CA2140540C - Electrical contact cleaner and method - Google Patents
Electrical contact cleaner and methodInfo
- Publication number
- CA2140540C CA2140540C CA002140540A CA2140540A CA2140540C CA 2140540 C CA2140540 C CA 2140540C CA 002140540 A CA002140540 A CA 002140540A CA 2140540 A CA2140540 A CA 2140540A CA 2140540 C CA2140540 C CA 2140540C
- Authority
- CA
- Canada
- Prior art keywords
- composition
- agent
- wax
- oxidation
- occluding agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/18—Hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
- B05C17/002—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces with feed system for supplying material from an external source; Supply controls therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/002—Maintenance of line connectors, e.g. cleaning
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A composition is disclosed for maximizing electrical contact between contact sur faces, consisting essentially of a volatile cleaning agent and an oxidation occluding agent. Also disclosed are applicator d evices and methods for cleaning and protecting electrical contact surfaces utilizing this composition.
Description
2 1 ~ 0 ~
' -PATENT APPLICATION
DOCKET NO.: KME-001 ELECTRICAL CONTACT CLEANER AND METHOD
Backqround of the Invention This invention relates to compositions useful for cleaning electrical contact surfaces. More particularly, the invention is directed to methods and compositions for maximizing electrical contact between contacting metal surfaces, particularly between the battery contacts in electrical devices such as portable lights, calculators, mechanized toys and games and the like.
It is well known that the exposed surfaces of most metals tend to attract oxygen atoms, leading to the formation of metal oxides on the exposed surface. It also is known that the spontaneous growth of such an oxide film on an exposed metal surface can force its way between two contacting surfaces, particularly when contact pressure between the two metals is light, such as between disposable batteries and their spring mount electrical contacts. Because metal oxides are poor conductors (non-conductors or, at best, semi-conductors), an interfering oxide film between electrical contact surfaces can reduce the area over which good electrical contact can be made, progressively degrading and eventually precluding electrical conduction.
French Patent No. 1020679 describes a composition containing a rubber, linseed oil, glyceryl phthalate resin, graphite and terbene (a mixture of terpenes) for protecting battery terminals from acids. German Patent AMENDED SHEET
IP~A/EP
214~.~4~
.~_ protecting battery terminals from acids. German Patent No. 3937297 describes a stick-type device for dispensing and applying an adhesive.
It is an object of this invention to provide a composition and method for cleaning metal contact surfaces so as to effectively establish and maintain maximal electrical contact between electrically conducting surfaces, and to protect these surfaces from subsequent oxidation. It is another object of this invention to provide an inexpensive, reuseable device for applying the composition of the invention to terminals of disposable batteries and for carrying out a preferred embodiment of the method of this invention.
These and other objects and features of the invention will be apparent from the description, drawings, and claims which follow.
AMENDED SHEI~T
IPEA/EP
21405~ ~
' Summary of the Invention The invention provides a composition comprising a mixture or solution of a volatile metal cleaning agent and an oxidation occluding agent. The composition is useful for restoring and preserving maximal electrical contact between two metal surfaces when applied to one or both surfaces.
The composition is applied to the metal surface preferably simultaneously with or after the surface has been abraded. The action of abrading the metal contact surface serves to dissociate metal oxides and/or other contaminants from the metal surface. The volatile cleaning agent displaces the abraded material from the metal surface, and the oxidation occluding agent forms a protective coating over the cleaned metal surface, substantially inhibiting reoxidation of the exposed metal. The composition of the invention allows electrical contacts to be cleaned quickly, easily and safely, and without the need for granular abrasives.
Metal cleaning agents which can be used in the present composition include volatile hydrocarbon solvents which are compatible with the oxidation occluding agent of choice. Hydrocarbon solvents which are particularly preferred include one or more terpene solvents, such as for example, limonene.
Oxidation occluding agents which can be used include waxes and wax/oil combinations compatible with the desired cleaning agent, and which are capable of forming a protective coating on the metal contact surface. Currently preferred occluding agents include waxes which may be made up of one or more different wax components. For example, useful waxes include synthetic waxes; ester-AMENDED SHEET
IPEA/EP
2140~
W094/039~ PCT/US93/~806 .~_ type waxes such as carnauba wax and rAndelilla wax;hydrocarbon waxes such as beeswax, and natural or synthetic paraffins.
The composition may further contain additives, including fragrances and/or coloring agents. For example, coloring agents rArahle of coloring the treated electrical contact surfaces may be added, thereby allowing the user to identify the metal surface as treated.
By varying the components of the composition and their concentrations, the composition may be a waxy solid, paste, or liquid. When the composition is a solid or paste, it can be applied to the metal contact surface with a cloth or other material. The cloth 1~ preferably has a rough or abrasive surface so that when it is used to apply the composition, it simultaneously abrades, cleans and coats the surface. If the composition is liquid, it is first absorbed into a porous or wir~ing material which is cApAhle of absorbing the liquid and retAining it therein, and which preferably acts as an abrasive. The metal surface then is rubbed with the impregnated material to abrade the metal surface and to simultaneously apply the absorbed liquid composition to the surface, thereby 2~ abrading, cleAning and protecting the contact surface in a single step. It will be apparent to those skilled in the art that the metal contact surface also can be abraded by rllhhing the surface with a sufficiently stiff abrasive material prior to the application of the composition of this invention.
In a particularly preferred embodiment of the invention, the composition is applied to a battery terminal and/or its mating contact in a battery-powered light, calculator, electronic camera or the like, by means of a specially designed applicator device. The device comprises a housing defining a reservoir for holding the composition of the invention in liquid form, a wick which is in communication with the reservoir and is itself rubbing surface protruding from the housing, and a removable cap means which interfits with the housing, surrounds the wick and rubbing surface, and serves to prevent evaporation of the volatile cleaning agent from the wick. Preferably, this cap is adapted to fit over the wick and the reservoir. The cap also may be adapted to interfit with a hole in the end of the housing opposite the wick to prevent misplacement when the device is in use.
According to an aspect of this invention, there is provided a composition for cleaning and preserving electrical contact between contact surfaces of a battery and a friction-fitted battery contact in a battery powered device, said composition consisting essentially of: a terpene solvent capable of displacing particles on an abraded metal contact surface; and in admixture therewith, a nonvolatile, spreadable, contact-adherent oxidation-occluding agent capable of forming a substantially continuous film on said abraded metal surface and selected from the group consisting of a wax, or a combination of a wax and an oil, wherein the amount of terpene solvent is in the range of 20% to 99~ by weight of the total composition, and the amount of oxidation-occluding agent is in the range of 1~ to 80~ by weight of the total composition.
According to another aspect of this invention, there is provided a method for establishing and preserving electrical contact between a battery terminal and a r~
- 5a -battery contact in a battery-powered device, said method comprising the steps of: a) abrading the surface of at least one of said terminal and said contact, b) cleaning said abraded surface with a terpene solvent, and c) depositing a film of a nonvolatile, adherent oxidation occluding agent on said cleaned abraded surface, said agent comprising terpene solvent in the range of 20~ to 99~ by weight of the total composition and oxidation occluding agent in the range of 1~ to 80 by weight of the total composition.
According to a further aspect of this invention, there is provided a device for establishing and preserving maximal electrical contact between electrical contact surfaces, the device comprising: a housing comprising an elongated pen-like hollow tubular structure dimensioned to be held in a human hand; a reservoir disposed within the housing holding a mixture comprising a volatile organic cleaning agent and a substantially nonvolatile, metal surface-adherent oxidation occluding agent, said agent comprising terpene solvent in the range of 20~ to 99~ by weight of the total composition and oxidation occluding agent in the range of 1~ to 80~ by weight of the total composition, a wick in communication with said reservoir and with a rubbing surface protruding from said housing, said wick being capable of absorbing and transporting said mixture to said rubbing surface, and being of sufficient stiffness to abrade a metal contact surface when rubbed against said surface, removable means interfitting with said housing disposed about said rubbing surface for preventing evaporation of said volatile cleaning agent from the wick.
'~4 'J ~ 4 ~
W094/03934 PCT/US93/0680' Brief Description of Drawings:
The foregoing and other objects of this invention, the various features thereof, as well as the invention itself, may be more fully understood from the following description, when read together with the accompanying drawings, in which:
Figure 1 is a longit~Ain~l cross section of a preferred embodiment of the applicator of the invention, and Figure 2 is a perspective view of the applicator of the invention ready for use.
Like-referenced characters in the respective drawn figures in~ic~te corresponAing parts.
21~0S~
_ Detailed Description of the Invention The composition of the present invention cleans electrical contact surfaces and protects the surfaces from oxidation thereby maintaining maximal electrical contact. The composition comprises a volatile cleaning agent capable of removing from the metal surface metal oxides and other cont~rinAnts which have been dissociated from the metal contact surface by abrasion, and an oxidation occluding agent capable of forming a protective coating over the contact surface, thereby inhibiting reoxidation and the build-up of insulative oxides on the cleaned metal surface.
The volatile cleaning agent is a hydrocarbon solvent which is compatible with the oxidation occluding agent and which has a sufficiently low vapor pressure that the solvent evaporates shortly after application. Preferably, the cleaning agent also serves as a vehicle for application of the oxidation occluding agent and is mutually miscible with the occluding agent. Particularly preferred hydrocarbon solvents include one or more terpene solvents. A
mixture of solvents having different evaporation rates may be used to adjust the rapidity with which the solvent evaporates from the composition during its application.
Terpenes are organic materials which are found in nature in the essential oils of many plants. Terpenes have carbon skeletons made up of isoprene (CH2=C-CH=CH2) units joined together in a regular,head-to-tail configuration. Terpene compounds include, for example, limonene, citronellol, T-terpinene, isoborneol, camphene and squalene. Terpenes can be Al\/IENDED SHEET
IPEA/EP
2 1 ~
monocyclic (e.g., dipentene), dicyclic (e.g., pinene) or acyclic (e.g., myrcene). Terpenes which are particularly useful include limonene and mixtures including limonene. Limonene (ClOHl6) occurs naturally in oils found in lemons, caraway and oranges, for example. Terpene solvents are biodegradable and non-toxic.
The oxidation occluding agent is a wax or wax/oil combination agent that is compatible with the cleaning solvent, and which can be applied readily to a contact surface by rubbing. It should be adherent to metal surfaces, capable of forming a coating on the metal surface and relatively nonvolatile. The coating formed by the occluding agent should be a substantially continuous coating or film on the metal surface capable of protecting the exposed metal surface from atmospheric oxygen and contaminants without interfering with electrical conduction. It need not itself be an electrical conductor.
Waxes, oils and mixtures thereof are particularly useful as oxidation occluding agents for use in the composition of this invention. The occluding agent may contain one or more waxes and/or oils depending on the desired form of the composition, and on the type of cleaning solvent used. Useful waxes include hydrocarbon waxes such as beeswax and paraffins (natural or synthetic); ester-type waxes such as carnauba and candelilla waxes; and synthetic waxes such as polyethylene waxes. Useful oils include, for example, mineral oil and drying oils such as tung oil and linseed oil.
A formula for a composition made in accordance with the principles of the present invention and establishing the range of the constituents is as follows (all percentages are by weight unless otherwise indicated):
AMENDED SHEET
IPEAIEP
W094/039~ 2 1 ~ O r~ ~ ~ PCT/US93/~8~
_ g _ volatile cleaning agent ........ 20-99%
oxidation occluding agent ...... 1.0-80%
The composition preferably comprises from about 10%
to about 50% occluding agent, with the hAlAnce being comprised of the volatile cleAning agent.
It will be readily understood that the above formula may be varied appreciably, ~epe~Aing~ for esample on the nature of the comro~ents used, and on the desired form of the final product. For example, in one embodiment of the invention, the composition may be formulated as a paste. Here, the preferred amounts of osidation occluding agent to cleAn i ng agent is about 67% occluding agent to about 33% cleaning agent. The paste may be prepared, for example, by blenAi~g the occluding agent (e.g., a wax or mixture of oils and waxes) in the cle~Aning agent solvent at a temperature above the melting point of the wax and below the boiling point of the solvent. Upon cooling, the wax precipitates from the solution and forms a matrix of amorphous crystal-like structures which entrap the solvent. A small amount of the paste then may be applied to a battery contact terminal surface and/or the mating battery terminals of an electrical device with a cloth or other flexible material. The action of ~lh~ing the paste on the metal surface with the cloth releases the solvent from the wax matrix, allowing it to clean the metal surface. The rubbing or abrading action serves to distribute the wax over the contact surface in a thin continuous coating.
Where a fluid composition is desired, a smaller ratio of occluding agent to solvent is suggested (e.g., about 25% occluding agent to about 75% cleAning agent).
w094/039~ 21~ O a ~1 ~ PCT/US93/~80~
OptionAlly~ a combination of occluding agents can be used, preferably a combination comprising one or more wases and oils. For example, an oil to ~nhAnce r fluidity and reduce viscosity may be used in combination with a "soft" wax to provide a durable coating. Mineral oil is preferred for this purpose.
Preferred component ratios for liquid formulations are about 33% occluding agent about to 67% cleAning agent, ho~le~er, higher amounts of occluding agent can be used 10 as long as the composition is still wiC~hle. A fluid composition may be formed essentially in the same way as a paste composition, by, for example, combining the occluding agent with the solvent at an elevated temperature, preferably stirring the solution as it 1~ cools to maintain a single phase solution.
In addition to the two essential components, the composition may contain various additives, including fragrances and/or coloring agents cA~Ahle of StA i n i or coloring-treating metal surfaces.
The composition of this invention is used in a method for ~nhAncing and main~Aining electrical contact between two or more contact surfaces, typically battery terminals and their mating contact~ in a battery-powered device. The method is carried out by abrading 2~ one or more of the surfaces, preferably by rubbing the surface with a cloth or other fibrous material of sufficient stiffness to dislocate any metal ori~s, dust and grit associated with the contact surface. The surface then is cleaned and protected by applying and r~lh~i~g the composition of this invention on the abraded surface. As in~irAted earlier, the steps of abrading the metal and applying the composition may be, and preferably are, performed as a single step. The treated contact surface then is plAce~ in contact with W094/039~ 2 1 ~ O ~ g r~ PCT/US93/~806 its reciprocal contact surface. CleAning and coating the esposed contact surface serves both to establish a good electrical conncction and to reduce substantially the opportunity for subsequent metal oxide formation, thereby maximizing and helping to maintain electrical contact LeL-~_el. the surfaces.
In another aspect, the invention is embo~ie~ as an applicator device 5 shown in the drawing. The device may be better understood by referring to Figure 1, wherein a generally cylindrical, hollow housing 8, easily hand-held, defines a wiC~i~g reservoir 10 which contains the composition of this invention 11 in liquid form. Housing 8 defines a hole 9 in its base and a seAling surface 7 adapted to interfit with a cap 14.
The reservoir 10 further contains a porous wicking material 12 rArAhle of absorbing and re~A i n i ng the composition among its porous interstices. The wicking material 12 comprises a material of sufficient stiffness such that, when rubbed against a metal 2D contact surface, it is c~rAhle of abrading the surface sufficiently to dislocate any associated metal QYi~es.
Wick 12 may be fabricated from synthetic and/or natural felts, intertangled cellulosic fibers, and similar known wicki~g materials. Wick 12 preferably is made of polyester felt. The housing and other parts preferably are molded plastic such as, for eYample, high density polyethylene. Wick 12 protrudes from the housing 8 and terminates at a rubbing surface 13, here defined by a flat, bevel cut end of wick 12. The AprlirAtor further comprises a removable cap 14 cArAhle of substantially ~evenLing evaporation of the volatile solvent when interfitted with the housing about the protruding wick 12 at sealing surface 7. In a par~iclllArly preferred embodiment of the device, the removable cap is adapted W094/03934 0~ 4 ~ PCT/US93/~80' to be held in the hole 9 in the base of the housing 8 when not in use. The method of the invention may be practiced ~on~eniently by removing cap 14, manually r~hhin~ the contact to be treated with rubbing surface 13, and then replacing the cap until the next use.
W094/03934 2 1 ~ 0 5 ~ ~ PCT/US93/06806 ._ - 13 _ Equivalents The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicAted by the appen~ claims rather than by the foregoing description, and all changes which come within the meAning and range of equivalency of the claims are therefore inten~ to be embraced therein.
' -PATENT APPLICATION
DOCKET NO.: KME-001 ELECTRICAL CONTACT CLEANER AND METHOD
Backqround of the Invention This invention relates to compositions useful for cleaning electrical contact surfaces. More particularly, the invention is directed to methods and compositions for maximizing electrical contact between contacting metal surfaces, particularly between the battery contacts in electrical devices such as portable lights, calculators, mechanized toys and games and the like.
It is well known that the exposed surfaces of most metals tend to attract oxygen atoms, leading to the formation of metal oxides on the exposed surface. It also is known that the spontaneous growth of such an oxide film on an exposed metal surface can force its way between two contacting surfaces, particularly when contact pressure between the two metals is light, such as between disposable batteries and their spring mount electrical contacts. Because metal oxides are poor conductors (non-conductors or, at best, semi-conductors), an interfering oxide film between electrical contact surfaces can reduce the area over which good electrical contact can be made, progressively degrading and eventually precluding electrical conduction.
French Patent No. 1020679 describes a composition containing a rubber, linseed oil, glyceryl phthalate resin, graphite and terbene (a mixture of terpenes) for protecting battery terminals from acids. German Patent AMENDED SHEET
IP~A/EP
214~.~4~
.~_ protecting battery terminals from acids. German Patent No. 3937297 describes a stick-type device for dispensing and applying an adhesive.
It is an object of this invention to provide a composition and method for cleaning metal contact surfaces so as to effectively establish and maintain maximal electrical contact between electrically conducting surfaces, and to protect these surfaces from subsequent oxidation. It is another object of this invention to provide an inexpensive, reuseable device for applying the composition of the invention to terminals of disposable batteries and for carrying out a preferred embodiment of the method of this invention.
These and other objects and features of the invention will be apparent from the description, drawings, and claims which follow.
AMENDED SHEI~T
IPEA/EP
21405~ ~
' Summary of the Invention The invention provides a composition comprising a mixture or solution of a volatile metal cleaning agent and an oxidation occluding agent. The composition is useful for restoring and preserving maximal electrical contact between two metal surfaces when applied to one or both surfaces.
The composition is applied to the metal surface preferably simultaneously with or after the surface has been abraded. The action of abrading the metal contact surface serves to dissociate metal oxides and/or other contaminants from the metal surface. The volatile cleaning agent displaces the abraded material from the metal surface, and the oxidation occluding agent forms a protective coating over the cleaned metal surface, substantially inhibiting reoxidation of the exposed metal. The composition of the invention allows electrical contacts to be cleaned quickly, easily and safely, and without the need for granular abrasives.
Metal cleaning agents which can be used in the present composition include volatile hydrocarbon solvents which are compatible with the oxidation occluding agent of choice. Hydrocarbon solvents which are particularly preferred include one or more terpene solvents, such as for example, limonene.
Oxidation occluding agents which can be used include waxes and wax/oil combinations compatible with the desired cleaning agent, and which are capable of forming a protective coating on the metal contact surface. Currently preferred occluding agents include waxes which may be made up of one or more different wax components. For example, useful waxes include synthetic waxes; ester-AMENDED SHEET
IPEA/EP
2140~
W094/039~ PCT/US93/~806 .~_ type waxes such as carnauba wax and rAndelilla wax;hydrocarbon waxes such as beeswax, and natural or synthetic paraffins.
The composition may further contain additives, including fragrances and/or coloring agents. For example, coloring agents rArahle of coloring the treated electrical contact surfaces may be added, thereby allowing the user to identify the metal surface as treated.
By varying the components of the composition and their concentrations, the composition may be a waxy solid, paste, or liquid. When the composition is a solid or paste, it can be applied to the metal contact surface with a cloth or other material. The cloth 1~ preferably has a rough or abrasive surface so that when it is used to apply the composition, it simultaneously abrades, cleans and coats the surface. If the composition is liquid, it is first absorbed into a porous or wir~ing material which is cApAhle of absorbing the liquid and retAining it therein, and which preferably acts as an abrasive. The metal surface then is rubbed with the impregnated material to abrade the metal surface and to simultaneously apply the absorbed liquid composition to the surface, thereby 2~ abrading, cleAning and protecting the contact surface in a single step. It will be apparent to those skilled in the art that the metal contact surface also can be abraded by rllhhing the surface with a sufficiently stiff abrasive material prior to the application of the composition of this invention.
In a particularly preferred embodiment of the invention, the composition is applied to a battery terminal and/or its mating contact in a battery-powered light, calculator, electronic camera or the like, by means of a specially designed applicator device. The device comprises a housing defining a reservoir for holding the composition of the invention in liquid form, a wick which is in communication with the reservoir and is itself rubbing surface protruding from the housing, and a removable cap means which interfits with the housing, surrounds the wick and rubbing surface, and serves to prevent evaporation of the volatile cleaning agent from the wick. Preferably, this cap is adapted to fit over the wick and the reservoir. The cap also may be adapted to interfit with a hole in the end of the housing opposite the wick to prevent misplacement when the device is in use.
According to an aspect of this invention, there is provided a composition for cleaning and preserving electrical contact between contact surfaces of a battery and a friction-fitted battery contact in a battery powered device, said composition consisting essentially of: a terpene solvent capable of displacing particles on an abraded metal contact surface; and in admixture therewith, a nonvolatile, spreadable, contact-adherent oxidation-occluding agent capable of forming a substantially continuous film on said abraded metal surface and selected from the group consisting of a wax, or a combination of a wax and an oil, wherein the amount of terpene solvent is in the range of 20% to 99~ by weight of the total composition, and the amount of oxidation-occluding agent is in the range of 1~ to 80~ by weight of the total composition.
According to another aspect of this invention, there is provided a method for establishing and preserving electrical contact between a battery terminal and a r~
- 5a -battery contact in a battery-powered device, said method comprising the steps of: a) abrading the surface of at least one of said terminal and said contact, b) cleaning said abraded surface with a terpene solvent, and c) depositing a film of a nonvolatile, adherent oxidation occluding agent on said cleaned abraded surface, said agent comprising terpene solvent in the range of 20~ to 99~ by weight of the total composition and oxidation occluding agent in the range of 1~ to 80 by weight of the total composition.
According to a further aspect of this invention, there is provided a device for establishing and preserving maximal electrical contact between electrical contact surfaces, the device comprising: a housing comprising an elongated pen-like hollow tubular structure dimensioned to be held in a human hand; a reservoir disposed within the housing holding a mixture comprising a volatile organic cleaning agent and a substantially nonvolatile, metal surface-adherent oxidation occluding agent, said agent comprising terpene solvent in the range of 20~ to 99~ by weight of the total composition and oxidation occluding agent in the range of 1~ to 80~ by weight of the total composition, a wick in communication with said reservoir and with a rubbing surface protruding from said housing, said wick being capable of absorbing and transporting said mixture to said rubbing surface, and being of sufficient stiffness to abrade a metal contact surface when rubbed against said surface, removable means interfitting with said housing disposed about said rubbing surface for preventing evaporation of said volatile cleaning agent from the wick.
'~4 'J ~ 4 ~
W094/03934 PCT/US93/0680' Brief Description of Drawings:
The foregoing and other objects of this invention, the various features thereof, as well as the invention itself, may be more fully understood from the following description, when read together with the accompanying drawings, in which:
Figure 1 is a longit~Ain~l cross section of a preferred embodiment of the applicator of the invention, and Figure 2 is a perspective view of the applicator of the invention ready for use.
Like-referenced characters in the respective drawn figures in~ic~te corresponAing parts.
21~0S~
_ Detailed Description of the Invention The composition of the present invention cleans electrical contact surfaces and protects the surfaces from oxidation thereby maintaining maximal electrical contact. The composition comprises a volatile cleaning agent capable of removing from the metal surface metal oxides and other cont~rinAnts which have been dissociated from the metal contact surface by abrasion, and an oxidation occluding agent capable of forming a protective coating over the contact surface, thereby inhibiting reoxidation and the build-up of insulative oxides on the cleaned metal surface.
The volatile cleaning agent is a hydrocarbon solvent which is compatible with the oxidation occluding agent and which has a sufficiently low vapor pressure that the solvent evaporates shortly after application. Preferably, the cleaning agent also serves as a vehicle for application of the oxidation occluding agent and is mutually miscible with the occluding agent. Particularly preferred hydrocarbon solvents include one or more terpene solvents. A
mixture of solvents having different evaporation rates may be used to adjust the rapidity with which the solvent evaporates from the composition during its application.
Terpenes are organic materials which are found in nature in the essential oils of many plants. Terpenes have carbon skeletons made up of isoprene (CH2=C-CH=CH2) units joined together in a regular,head-to-tail configuration. Terpene compounds include, for example, limonene, citronellol, T-terpinene, isoborneol, camphene and squalene. Terpenes can be Al\/IENDED SHEET
IPEA/EP
2 1 ~
monocyclic (e.g., dipentene), dicyclic (e.g., pinene) or acyclic (e.g., myrcene). Terpenes which are particularly useful include limonene and mixtures including limonene. Limonene (ClOHl6) occurs naturally in oils found in lemons, caraway and oranges, for example. Terpene solvents are biodegradable and non-toxic.
The oxidation occluding agent is a wax or wax/oil combination agent that is compatible with the cleaning solvent, and which can be applied readily to a contact surface by rubbing. It should be adherent to metal surfaces, capable of forming a coating on the metal surface and relatively nonvolatile. The coating formed by the occluding agent should be a substantially continuous coating or film on the metal surface capable of protecting the exposed metal surface from atmospheric oxygen and contaminants without interfering with electrical conduction. It need not itself be an electrical conductor.
Waxes, oils and mixtures thereof are particularly useful as oxidation occluding agents for use in the composition of this invention. The occluding agent may contain one or more waxes and/or oils depending on the desired form of the composition, and on the type of cleaning solvent used. Useful waxes include hydrocarbon waxes such as beeswax and paraffins (natural or synthetic); ester-type waxes such as carnauba and candelilla waxes; and synthetic waxes such as polyethylene waxes. Useful oils include, for example, mineral oil and drying oils such as tung oil and linseed oil.
A formula for a composition made in accordance with the principles of the present invention and establishing the range of the constituents is as follows (all percentages are by weight unless otherwise indicated):
AMENDED SHEET
IPEAIEP
W094/039~ 2 1 ~ O r~ ~ ~ PCT/US93/~8~
_ g _ volatile cleaning agent ........ 20-99%
oxidation occluding agent ...... 1.0-80%
The composition preferably comprises from about 10%
to about 50% occluding agent, with the hAlAnce being comprised of the volatile cleAning agent.
It will be readily understood that the above formula may be varied appreciably, ~epe~Aing~ for esample on the nature of the comro~ents used, and on the desired form of the final product. For example, in one embodiment of the invention, the composition may be formulated as a paste. Here, the preferred amounts of osidation occluding agent to cleAn i ng agent is about 67% occluding agent to about 33% cleaning agent. The paste may be prepared, for example, by blenAi~g the occluding agent (e.g., a wax or mixture of oils and waxes) in the cle~Aning agent solvent at a temperature above the melting point of the wax and below the boiling point of the solvent. Upon cooling, the wax precipitates from the solution and forms a matrix of amorphous crystal-like structures which entrap the solvent. A small amount of the paste then may be applied to a battery contact terminal surface and/or the mating battery terminals of an electrical device with a cloth or other flexible material. The action of ~lh~ing the paste on the metal surface with the cloth releases the solvent from the wax matrix, allowing it to clean the metal surface. The rubbing or abrading action serves to distribute the wax over the contact surface in a thin continuous coating.
Where a fluid composition is desired, a smaller ratio of occluding agent to solvent is suggested (e.g., about 25% occluding agent to about 75% cleAning agent).
w094/039~ 21~ O a ~1 ~ PCT/US93/~80~
OptionAlly~ a combination of occluding agents can be used, preferably a combination comprising one or more wases and oils. For example, an oil to ~nhAnce r fluidity and reduce viscosity may be used in combination with a "soft" wax to provide a durable coating. Mineral oil is preferred for this purpose.
Preferred component ratios for liquid formulations are about 33% occluding agent about to 67% cleAning agent, ho~le~er, higher amounts of occluding agent can be used 10 as long as the composition is still wiC~hle. A fluid composition may be formed essentially in the same way as a paste composition, by, for example, combining the occluding agent with the solvent at an elevated temperature, preferably stirring the solution as it 1~ cools to maintain a single phase solution.
In addition to the two essential components, the composition may contain various additives, including fragrances and/or coloring agents cA~Ahle of StA i n i or coloring-treating metal surfaces.
The composition of this invention is used in a method for ~nhAncing and main~Aining electrical contact between two or more contact surfaces, typically battery terminals and their mating contact~ in a battery-powered device. The method is carried out by abrading 2~ one or more of the surfaces, preferably by rubbing the surface with a cloth or other fibrous material of sufficient stiffness to dislocate any metal ori~s, dust and grit associated with the contact surface. The surface then is cleaned and protected by applying and r~lh~i~g the composition of this invention on the abraded surface. As in~irAted earlier, the steps of abrading the metal and applying the composition may be, and preferably are, performed as a single step. The treated contact surface then is plAce~ in contact with W094/039~ 2 1 ~ O ~ g r~ PCT/US93/~806 its reciprocal contact surface. CleAning and coating the esposed contact surface serves both to establish a good electrical conncction and to reduce substantially the opportunity for subsequent metal oxide formation, thereby maximizing and helping to maintain electrical contact LeL-~_el. the surfaces.
In another aspect, the invention is embo~ie~ as an applicator device 5 shown in the drawing. The device may be better understood by referring to Figure 1, wherein a generally cylindrical, hollow housing 8, easily hand-held, defines a wiC~i~g reservoir 10 which contains the composition of this invention 11 in liquid form. Housing 8 defines a hole 9 in its base and a seAling surface 7 adapted to interfit with a cap 14.
The reservoir 10 further contains a porous wicking material 12 rArAhle of absorbing and re~A i n i ng the composition among its porous interstices. The wicking material 12 comprises a material of sufficient stiffness such that, when rubbed against a metal 2D contact surface, it is c~rAhle of abrading the surface sufficiently to dislocate any associated metal QYi~es.
Wick 12 may be fabricated from synthetic and/or natural felts, intertangled cellulosic fibers, and similar known wicki~g materials. Wick 12 preferably is made of polyester felt. The housing and other parts preferably are molded plastic such as, for eYample, high density polyethylene. Wick 12 protrudes from the housing 8 and terminates at a rubbing surface 13, here defined by a flat, bevel cut end of wick 12. The AprlirAtor further comprises a removable cap 14 cArAhle of substantially ~evenLing evaporation of the volatile solvent when interfitted with the housing about the protruding wick 12 at sealing surface 7. In a par~iclllArly preferred embodiment of the device, the removable cap is adapted W094/03934 0~ 4 ~ PCT/US93/~80' to be held in the hole 9 in the base of the housing 8 when not in use. The method of the invention may be practiced ~on~eniently by removing cap 14, manually r~hhin~ the contact to be treated with rubbing surface 13, and then replacing the cap until the next use.
W094/03934 2 1 ~ 0 5 ~ ~ PCT/US93/06806 ._ - 13 _ Equivalents The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicAted by the appen~ claims rather than by the foregoing description, and all changes which come within the meAning and range of equivalency of the claims are therefore inten~ to be embraced therein.
Claims (27)
1. A composition for cleaning and preserving electrical contact between contact surfaces of a battery and a friction-fitted battery contact in a battery powered device, said composition consisting essentially of:
a terpene solvent capable of displacing particles on an abraded metal contact surface; and in admixture therewith, a nonvolatile, spreadable, contact-adherent oxidation-occluding agent capable of forming a substantially continuous film on said abraded metal surface and selected from the group consisting of a wax, or a combination of a wax and an oil, wherein the amount of terpene solvent is in the range of 20% to 99% by weight of the total composition, and the amount of oxidation-occluding agent is in the range of 1% to 80% by weight of the total composition.
a terpene solvent capable of displacing particles on an abraded metal contact surface; and in admixture therewith, a nonvolatile, spreadable, contact-adherent oxidation-occluding agent capable of forming a substantially continuous film on said abraded metal surface and selected from the group consisting of a wax, or a combination of a wax and an oil, wherein the amount of terpene solvent is in the range of 20% to 99% by weight of the total composition, and the amount of oxidation-occluding agent is in the range of 1% to 80% by weight of the total composition.
2. The composition of claim 1 wherein said terpene solvent comprises a terpene or mixture of terpenes.
3. The composition of claim 2 wherein said terpene comprises limonene.
4. The composition of claim 1 wherein said occluding agent is a wax selected from the group consisting of: ester-type waxes, hydrocarbon waxes, and synthetic waxes.
5. The composition of claim 1 wherein said occluding agent is selected from the group consisting of:
carnauba wax, candelilla wax, beeswax, and paraffin waxes.
carnauba wax, candelilla wax, beeswax, and paraffin waxes.
6. The composition of claim 1 wherein the oil is mineral oil.
7. The composition of claim 1 further comprising an amount of a coloring agent sufficient to provide a visible color to said abraded metal contact surface when said composition is applied to said surface.
8. The composition of claim 1 wherein said composition comprises a paste.
9. The composition of claim 1 wherein the oxidation occluding agent comprises from about 10% to about 50% by weight of the total composition.
10. A method for establishing and preserving electrical contact between a battery terminal and a battery contact in a battery-powered device, said method comprising the steps of:
a) abrading the surface of at least one of said terminal and said contact, b) cleaning said abraded surface with a terpene solvent, and c) depositing a film of a nonvolatile, adherent oxidation occluding agent on said cleaned abraded surface, said agent comprising terpene solvent in the range of 20% to 99% by weight of the total composition and oxidation occluding agent in the range of 1% to 80% by weight of the total composition.
a) abrading the surface of at least one of said terminal and said contact, b) cleaning said abraded surface with a terpene solvent, and c) depositing a film of a nonvolatile, adherent oxidation occluding agent on said cleaned abraded surface, said agent comprising terpene solvent in the range of 20% to 99% by weight of the total composition and oxidation occluding agent in the range of 1% to 80% by weight of the total composition.
11. The method of claim 10 wherein steps (a) - (c) are performed simultaneously as a single step by manually rubbing said surface with an abrasive medium permeated with a mixture of a terpene solvent and an oxidation occluding agent.
12. The method of claim 10 wherein said terpene solvent comprises a terpene or mixture of terpenes.
13. The method of claim 10 wherein said terpene solvent comprises limonene.
14. The method of claim 12 wherein said occluding agent is a wax selected from the group consisting of: ester-type waxes, hydrocarbon waxes, and synthetic waxes.
15. The method of claim 12 wherein said occluding agent is a wax/oil combination.
16. A device for establishing and preserving maximal electrical contact between electrical contact surfaces, the device comprising:
a housing comprising an elongated pen-like hollow tubular structure dimensioned to be held in a human hand;
a reservoir disposed within the housing holding a mixture comprising a volatile organic cleaning agent and a substantially nonvolatile, metal surface-adherent oxidation occluding agent, said agent comprising terpene solvent in the range of 20% to 99% by weight of the total composition and oxidation occluding agent in the range of 1%
to 80% by weight of the total composition, a wick in communication with said reservoir and with a rubbing surface protruding from said housing, said wick being capable of absorbing and transporting said mixture to said rubbing surface, and being of sufficient stiffness to abrade a metal contact surface when rubbed against said surface, removable means interfitting with said housing disposed about said rubbing surface for preventing evaporation of said volatile cleaning agent from the wick.
a housing comprising an elongated pen-like hollow tubular structure dimensioned to be held in a human hand;
a reservoir disposed within the housing holding a mixture comprising a volatile organic cleaning agent and a substantially nonvolatile, metal surface-adherent oxidation occluding agent, said agent comprising terpene solvent in the range of 20% to 99% by weight of the total composition and oxidation occluding agent in the range of 1%
to 80% by weight of the total composition, a wick in communication with said reservoir and with a rubbing surface protruding from said housing, said wick being capable of absorbing and transporting said mixture to said rubbing surface, and being of sufficient stiffness to abrade a metal contact surface when rubbed against said surface, removable means interfitting with said housing disposed about said rubbing surface for preventing evaporation of said volatile cleaning agent from the wick.
17. The device of claim 16 wherein said mixture further comprises a dye capable of coloring said metal surface when applied to said surface.
18. The device of claim 16 wherein said wick comprises a polyester felt.
19. The device of claim 16 wherein said removable means for preventing evaporation of said volatile cleaning agent comprises a cap.
20. The device of claim 19 wherein said cap is further adapted to fit in a mating area disposed on the exterior of said housing for temporary storage.
21. The device of claim 16 wherein said metal cleaning agent comprises a terpene.
22. The device of claim 21 wherein said terpene is limonene.
23. The device of claim 16 wherein the occluding agent is a wax selected from the group consisting of:
ester-type waxes, hydrocarbon waxes and synthetic waxes.
ester-type waxes, hydrocarbon waxes and synthetic waxes.
24. The device of claim 23 wherein said wax is selected from the group consisting of carnauba wax, candelilla wax, beeswax, and paraffins.
25. The device of claim 16 wherein said occluding agent is a combination of a wax and oil.
26. The device of claim 25 wherein said oil is mineral oil.
27. The device of claim 16 wherein said oxidation occluding agent comprises up to about 50% by weight of said solution in said reservoir.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US92468092A | 1992-08-03 | 1992-08-03 | |
| US924,680 | 1992-08-03 |
Publications (2)
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| CA2140540A1 CA2140540A1 (en) | 1994-02-17 |
| CA2140540C true CA2140540C (en) | 1999-03-16 |
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ID=25450539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002140540A Expired - Fee Related CA2140540C (en) | 1992-08-03 | 1993-07-20 | Electrical contact cleaner and method |
Country Status (6)
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|---|---|
| US (2) | US5607512A (en) |
| EP (1) | EP0653107B1 (en) |
| AU (1) | AU4777393A (en) |
| CA (1) | CA2140540C (en) |
| DE (1) | DE69305859T2 (en) |
| WO (1) | WO1994003934A1 (en) |
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| US5989361A (en) * | 1996-03-25 | 1999-11-23 | Knapp; John W | V.E.T. video enhancement treatment |
| DE29620498U1 (en) * | 1996-11-25 | 1998-03-26 | Melitta Haushaltsprodukte | Device for descaling objects of all kinds |
| TW419400B (en) * | 1999-10-01 | 2001-01-21 | Winbond Electronics Corp | Cleaning device |
| CH695178A5 (en) * | 2000-04-19 | 2005-12-30 | Ecs Ag | Method and apparatus for reducing corrosion and abrasion of acted upon by plug-in contact means contact surfaces. |
| US6896741B2 (en) * | 2002-08-13 | 2005-05-24 | William N. Stelcher | Tool for gathering materials including particles and hairs |
| US7553100B2 (en) * | 2003-01-09 | 2009-06-30 | Audrey Muhr-Sweeney | Dual cleaning apparatus |
| US20040136770A1 (en) * | 2003-01-09 | 2004-07-15 | Audrey Muhr-Sweeney | Dual cleaning apparatus |
| EP2222808A2 (en) * | 2007-12-05 | 2010-09-01 | 3M Innovative Properties Company | Assembly bonded to a structural adhesive and method and applicator for making it |
| US20140182073A1 (en) * | 2012-12-29 | 2014-07-03 | Dean MacCauther Mitchell | Fully Disposable Toilet Bowl Brush |
| US9433854B1 (en) * | 2015-02-13 | 2016-09-06 | Andre D'Alessandro | Device and method for removing scratch-off coatings |
Family Cites Families (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US938846A (en) * | 1908-10-31 | 1909-11-02 | Adelbert G Gunn | Self-feeding marker. |
| US1105457A (en) * | 1913-01-29 | 1914-07-28 | George A Roberts | Felt polishing-stick. |
| US1297675A (en) * | 1917-10-08 | 1919-03-18 | Christopher A Garvey | Brush. |
| US1761499A (en) * | 1929-03-16 | 1930-06-03 | George H Sommerfield | Cleaning device |
| US1935639A (en) * | 1932-05-19 | 1933-11-21 | William T Keeshan | Container and applicator |
| US1935024A (en) * | 1932-12-01 | 1933-11-14 | Aaron Arthur Wiseberg | Spotting buffer |
| US2442051A (en) * | 1945-10-18 | 1948-05-25 | Joseph P Luscri | Swab for the removal of fingernail polish |
| US2530234A (en) * | 1946-06-29 | 1950-11-14 | Western Electric Co | Portable fluid applicator with controlled feed |
| US2541459A (en) * | 1948-08-13 | 1951-02-13 | Mildred B Bernard | Manicuring device |
| FR1020679A (en) * | 1950-06-22 | 1953-02-09 | Varnish, in particular for the protection of battery terminals and terminals | |
| GB808416A (en) * | 1954-06-30 | 1959-02-04 | Painton & Co Ltd | Electrical contact lubrication |
| US3000040A (en) * | 1955-11-03 | 1961-09-19 | Carlson Walter | Cleaning device |
| US3071479A (en) * | 1957-06-19 | 1963-01-01 | Jr Hal Fulenwider | Combination polishing and cleaning composition |
| US3041649A (en) * | 1959-11-25 | 1962-07-03 | Burthel B Isenhour | Tool for repairing electrical connections |
| GB1250761A (en) * | 1968-02-05 | 1971-10-20 | ||
| US4055687A (en) * | 1976-01-26 | 1977-10-25 | Blue Maurice R | Battery terminal post cleaner |
| US4578215A (en) * | 1983-08-12 | 1986-03-25 | Micro-Circuits Company | Electrical conductivity-enhancing and protecting material |
| US4749618A (en) * | 1985-03-11 | 1988-06-07 | Pilot Ink Co., Ltd. | Tip member for coating tool |
| US4673089A (en) * | 1985-10-18 | 1987-06-16 | Selfix, Inc. | Sliding mug/cup organizer |
| JPS62136617A (en) * | 1985-12-10 | 1987-06-19 | ランダレツテ，インコ−ポレ−テツド | Cleaning apparatus and kit for lens of telescope and camera or the like |
| DE3937297A1 (en) * | 1989-11-09 | 1991-06-06 | Henkel Kgaa | Pen-type adhesive applicator - has cartridge adhesive tank with capillary wick |
| US5148572A (en) * | 1989-12-20 | 1992-09-22 | Wells James M | Video game console and cartridge cleaning kit |
| US5042954A (en) * | 1990-10-03 | 1991-08-27 | Banks Robert E | Portable, purse or pocket size gemstone cleaner |
| DE4101785A1 (en) * | 1991-01-18 | 1992-07-23 | Ahrens Hans Joachim Dipl Phys | Applicator pen for liquids - has capillary pin for self-regulating pressure control system |
| US5080722A (en) * | 1991-02-26 | 1992-01-14 | At&T Bell Laboratories | Method for cleaning electrical connectors |
| US5181292A (en) * | 1991-03-15 | 1993-01-26 | Abraham Aghachi | Cleaning cartridge for video games and computers |
| AU1265092A (en) * | 1991-07-17 | 1993-02-23 | Church & Dwight Company, Inc. | Aqueous electronic circuit assembly cleaner and method |
| US5234506A (en) * | 1991-07-17 | 1993-08-10 | Church & Dwight Co., Inc. | Aqueous electronic circuit assembly cleaner and method |
| US5238504A (en) * | 1991-09-27 | 1993-08-24 | Advanced Research Technologies | Use of terpene hydrocarbons and ketone blends for electrical contact cleaning |
-
1993
- 1993-07-20 WO PCT/US1993/006806 patent/WO1994003934A1/en active IP Right Grant
- 1993-07-20 DE DE69305859T patent/DE69305859T2/en not_active Expired - Fee Related
- 1993-07-20 CA CA002140540A patent/CA2140540C/en not_active Expired - Fee Related
- 1993-07-20 EP EP93918263A patent/EP0653107B1/en not_active Expired - Lifetime
- 1993-07-20 AU AU47773/93A patent/AU4777393A/en not_active Abandoned
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1994
- 1994-02-28 US US08/204,464 patent/US5607512A/en not_active Expired - Fee Related
-
1996
- 1996-11-13 US US08/748,283 patent/US5661869A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US5607512A (en) | 1997-03-04 |
| EP0653107B1 (en) | 1996-11-06 |
| US5661869A (en) | 1997-09-02 |
| DE69305859T2 (en) | 1997-06-12 |
| DE69305859D1 (en) | 1996-12-12 |
| CA2140540A1 (en) | 1994-02-17 |
| AU4777393A (en) | 1994-03-03 |
| WO1994003934A1 (en) | 1994-02-17 |
| EP0653107A1 (en) | 1995-05-17 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |