US3601645A - Electrical contact brushes - Google Patents
Electrical contact brushes Download PDFInfo
- Publication number
- US3601645A US3601645A US825305A US3601645DA US3601645A US 3601645 A US3601645 A US 3601645A US 825305 A US825305 A US 825305A US 3601645D A US3601645D A US 3601645DA US 3601645 A US3601645 A US 3601645A
- Authority
- US
- United States
- Prior art keywords
- metal
- metallic layer
- layer
- electrical
- brush
- 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 - Lifetime
Links
- 239000004020 conductor Substances 0.000 claims abstract description 37
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 7
- 239000004615 ingredient Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 2
- 239000000843 powder Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/36—Connections of cable or wire to brush
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49119—Brush
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
An electrical brush comprises a metal-and-carbon containing body and a metallic layer to which an electrical conductor is or may be secured and electrically connected. The metal-and-carbon containing body is sintered with the metallic layer in an area which is greater than the area at the connection of the electrical conductor to the layer.
Description
United States Patent 72] inventor Colin Whiteheart Morden, England [21] Appl. No. 825,305
[22] Filed May 16, 1969 [45] Patented Aug. 24, 1971 [73] Assignee Marganite Carbon Limited London, England [32] Priority May 23, 1968 [33] Great Britain [54] ELECTRICAL CONTACT BRUSHES 10 Claims, 7 Drawing Figs.
[52] 11.8. CI 310/249, 29/630 E, 310/251, 310/252 [51] Int. Cl 1101! 39/36 [50] Field of Search 219/226; 245/247; 310/249, 251, 252, 253
[56} References Cited UNITED STATES PATENTS 1,053,881 2/1913 Scott eta] 310/251 Primary Examiner-D. F. Duggan Assistant ExaminerB. A. Reynolds AttorneyBa1dwin, Wight & Brown ABSTRACT: An electrical brush comprises a metal-and-carbon containing body and a metallic layer to which an electrical conductor is or may be secured and electrically connected. The metal-and-carbon containing body is sintered with the metallic layer in an area which is greater than the area at the connection of the electrical conductor to the layer.
ELECTRICAL CONTACT BRUSHES This invention relates to electrical contact brushes and to the manner in which a flexible electrical conductor is attached to the'body of the brush.
It is known to attach a flexible conductor to a brush by inserting the conductor in a hole formed in the body of the brush and thereafter securing the conductor within the hole by means of, for example, solder or compressed metal, or a rivet, or by swagging the brush around the conductor. These methods are well established but they are not all universally applicable; consequently a particular method of attachment must be selected for a particular brush design or construction. For example, it is very difficult to drill a suitable hole if the brush is very small. Also the various methods have their own particular disadvantages. The use of compressed powders in a hole may not provide adequate securing strength when the conductor is subjected to intermittent vibration and shock. Soldering presents problem due to the shrinkage of the material when the solder cools. Swagging raises the brush material density in the area at which the swagging takes place, and this represents a waste of expensive copper, for example, and it can also lead to disintegration of the brush material at the swagging area.
The present invention seeks to overcome these disad-.
vantages.
According to the present invention an electrical contact brush comprises a metal-and-carbon containing body, a metallic layer sintered with said body, and electrical conductor means secured to said metallic layer and electrically connected therewith, said metallic layer having a greater tensile strength than that of said body.
The brush body may be made of a number of materials known in the art of electrical brush manufacture. Thus it may be selected from a wide range of materials going from a mixture of carbon with various metals or alloys (for example copper or copper with one or more additives such as lead, tin, manganese or silver), carbon/metal mixtures containing small quantities of other additives such as nonconducting abrasives and lubricants including molybdenum disulflde and P.T.F.E., i.e. polytetrafluoroethylene, through to metals containing only small amounts of carbon and/or other additives.
The main purpose of this invention is to overcome the problems encountered with brush designs wherein there is a weakness in the area of the junction between the body and the flexible conductor and particularly in the body portion immediately surrounding the junction. Therefore, whilst the invention might be applicable to almost all brushes, it is particularly concerned with brushes whose body construction is such that problems have been encountered in usage due to fracture near the junction of the body with the flexible conductor.
Thus the metallic material of the layer sintered onto the body is chosen to have a greater tensile strength than the material of the body (which itself may contain a large proportion of metal), and the area of contact between the metallic layer and the body should be larger than the area of contact between the flexible conductor and the metallic layer, thereby effectively spreading the load over a relatively large area of the body if any jerks are applied to the flexible conductor.
In one preferred embodiment of the invention the metallic layer effectively covers the face of the body of the brush opposite to the working (electrical contact) face.
Examples of the present invention will now be described with reference to the accompanying drawing in which:
FIG. I is a-side view of one embodiment of an electrical contact brush,
FIG, 2 is a view, in cross section, of another embodiment of an electrical contact brush, and
FIGS. 3 7 illustrates varioussteps in the manufacture of an electrical contact brush.
In the figures an'electrical contact brush comprises a body 1 having attached thereto a metallic layer 2 to which is secured a flexible electrical conductor 3. The brush body 1 is composedprimarily of a metal and graphite and the metal canbe, for example, copper together with alloyconstituents known in the art. The metallic layer 2 can be composed of, for example, copper or iron, or a mixture thereof but the invention is not limited to the use of such metals. The flexible conductor 3 may be formed from thin electrically conductive metal strands of, for example, copper. The strands can, of course, be formed from any other suitable metal.
In the example illustrated in FIG. 1 the flexible electrical conductor 3 is attached to a surface of the metal layer 2 by welding. The welded joint is indicated at 4. It is preferred that the welded joint is made by using a pressure-resistance welding technique.
In FIG. 2 the flexible conductor 3 is secured to the metal layer 2 by forming a bore in the layer 2 and thereafter securing one end of the flexible conductor within the bore by tamping with, for example, copper particles 6.
Although not illustrated the flexible conductor 3 can, if desired, be placed in the bore and thereafter soldered to the metallic layer 2.
The brush body 1 is composed primarily of a metal and a graphite, and the metal may be copper with alloy constituents known in the art. Copper, or any other suitable metal can be present up to percent of the total brush composition. A wide variety of materials may be used for the brush body, for example, compositions of metal and graphite in the range of from 25 percent copper, 75 percent graphite to 95 percent copper, 5 percent graphite, and the compositions may include lead, tin, zinc or a combination of these up to about 15 percent of the total composition so that, at the extreme, the brush composition may consist of 95 percent metal or alloy and 5 percent graphite. It will thus be realized that the actual brush materials themselves are not of prime importance but the present invention is particularly useful when it is necessary to attach a flexible copper conductor to a brush containing a major proportion of metal.
It is arranged that the surface area of contact between the metallic layer 2 and the brush body 1 is larger than that between the flexible conductor 3 and the metal layer 2. With this arrangement should the flexible conductor 3 be subjected to any form of tensile loading, the load per unit area on the body is comparatively reduced and certainly less than what it would be if the conductor were attached directly to the body.
It is preferred that the metallic layer 2 is formed and attached to the brush body 1 by cocompacting and cosintering the layer material together with the brush body material.
The compacting and sintering processes are illustrated schematically in FIGS. 3-7. FIG. 3 represents a compaction press which includes a die 7 having a pair of reciprocal plungers 8 and 9. Metallic powders to form the brush body 1 are placed in the die as shown in FIG. 4. The bottom plunger 8 is then lowered by a specified amount. Powders which constitute the metallic layer 2 are then put in the die 7 on top of the constituent powders of the brush body 1. This is shown in FIG. 6. The top plunger 9 is then brought down to compress and so compact the powders together and the compacted constituents are then sintered at a suitable temperature for a suitable period of time.
In one particular example of the present invention the following metallic powders were blended together with a small amount of die lubricant, stearic acid (zinc steareate was also suitable as the die lubricant):
78 parts by weight of mesh copper powder,
10 parts by weight of 200 mesh lead powder,
six parts by weight of 100 mesh manganese powder, and
six parts by weight of 200 mesh natural graphite.
The mixture of powders was put into the die of a compaction pressand on to the top of this powder was placed a measured quantity of I00 mesh reduced sponge iron powder to form a layer of 5 mm. depth. The powders were then cocompacted together at 10 tons per square inch pressure and were cosintered at 840 for 1 hour in a suitable protected atmosphere.
It should be noted that the powders forming the brush body 1 can be compressed before the powders constituting the metallic layer 2 are placed thereon. However, subsequent compaction does not provide a bond between the body and the layer as good as that of the first'mentioned process. Accordingly, the first process is preferred.
The cocompacting and cosintering processes provide an excellent physical and electrical bond between the brush body and the metal layer. The joint between the flexible electrical conductor and the metallic layer, whether it be made by welding, tamping or soldering, is physically strong since the attachment is made between two metals. And since the surface area at the interface between the metallic layer and the brush body is larger than that between the flexible conductor and the layer' any tensile loading applied to the flexible conductor will be distributed evenly over the rush at said interface.
What I claim is:
1. An electrical brush comprising a metal-and-carbon containing body, a metallic layer sintered with said body, said metallic layer comprising a metal other than any ingredient of said body, and electrical conductor means secured to said metallic layer and electrically connected therewith, said metallic layer having a greater tensile strength than that of said body.
2. An electrical brush according to claim 1 wherein the surface area of contact at the interface between said metallic layer and said body is greater than that between said metallic layer and said conductor means.
. metallic layer comprises copper.
.7. An electrical brush according to claim 1 wherein said metallic layer consists essentially of a metal alloy.
8. An electrical brush according to claim 1 wherein said metallic layer consists essentially of a mixture of copper and iron.
9. An electrical brush according to claim 1 wherein said body is a composition essentially of copper and graphite in the range of from 25 percentcopper, percent graphite to percent copper, 5 percent graphite.
10. An electrical brush comprising a body of sintered metaland-carbon; a sintered metallic material layer, said metal-andcarbon of said body being cosintered with the metallic material of said layer, said metallic material layer comprising a metal other than any ingredient of said body; and electrical conductor means secured to said layer and electrically connected therewith, said layer having a greater tensile strength than said body.
Claims (10)
1. An electrical brush comprising a metal-and-carbon containing body, a metallic layer sintered with said body, said metallic layer comprising a metal other than any ingredient of said body, and electrical conductor means secured to said metallic layer and electrically connected therewith, said metallic layer having a greater tensile strength than that of said body.
2. An electrical brush according to claim 1 wherein the surface area of contact at the interface between said metallic layer and said body is greater than that between said metallic layer and said conductor means.
3. An electrical brush according to claim 1 wherein said conductor means comprises a flexible electrical conductor, said flexible conductor being secured integrally to said metallic layer.
4. An electrical brush according to claim 1 wherein said metallic layer consists essentially of a metal.
5. An electrical brush according to claim 4 wherein said metal is iron.
6. An electrical brush according to claim 1 wherein said metallic layer comprises copper.
7. An electrical brush according to claim 1 wherein said metallic layer consists essentially of a metal alloy.
8. An electrical brush according to claim 1 wherein said metallic layer consists essentially of a mixture of copper and iron.
9. An electrical brush according to claim 1 wherein said body is a composition essentially of copper and graphite in the range of from 25 percent copper, 75 percent graphite to 95 percent copper, 5 percent graphite.
10. AN electrical brush comprising a body of sintered metal-and-carbon; a sintered metallic material layer, said metal-and-carbon of said body being cosintered with the metallic material of said layer, said metallic material layer comprising a metal other than any ingredient of said body; and electrical conductor means secured to said layer and electrically connected therewith, said layer having a greater tensile strength than said body.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2463768 | 1968-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3601645A true US3601645A (en) | 1971-08-24 |
Family
ID=10214872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US825305A Expired - Lifetime US3601645A (en) | 1968-05-23 | 1969-05-16 | Electrical contact brushes |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3601645A (en) |
| JP (1) | JPS5311641B1 (en) |
| AT (1) | AT288535B (en) |
| BE (1) | BE733581A (en) |
| DE (1) | DE1926203A1 (en) |
| ES (1) | ES367569A1 (en) |
| FR (1) | FR2009196A1 (en) |
| GB (1) | GB1259454A (en) |
| NL (1) | NL6907728A (en) |
| SE (1) | SE367735B (en) |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3786292A (en) * | 1972-04-26 | 1974-01-15 | Morganite Carbon Ltd | An electrical contact brush assembly with anti-vibration head |
| US4101453A (en) * | 1976-03-20 | 1978-07-18 | Lucas Industries Limited | Sintered composition |
| US4131460A (en) * | 1976-03-20 | 1978-12-26 | Lucas Industries Limited | Method of producing a sintered composition |
| US4366361A (en) * | 1976-04-09 | 1982-12-28 | Lucas Industries Limited | Method of producing an electrical component |
| US5152380A (en) * | 1988-06-23 | 1992-10-06 | Hoffmann & Co. Elektrokohle Gesellschaft Mbh | Collector shoe for collector and process for producing it |
| US5214335A (en) * | 1992-07-07 | 1993-05-25 | General Motors Corporation | Brush and slip ring apparatus for dynamoelectric machines |
| US5263562A (en) * | 1988-06-23 | 1993-11-23 | Hoffman & Co. Elektrokohle Gesellschaft M.B.H | Carbon brush for collector |
| EP0627795A1 (en) * | 1993-06-04 | 1994-12-07 | Le Carbone Lorraine | A simplified method for producing brushes |
| US5447681A (en) * | 1993-12-21 | 1995-09-05 | Mando Corporation | Method for manufacturing metal graphite brush |
| US5701046A (en) * | 1993-09-02 | 1997-12-23 | Le Carbone Lorraine | Process for the production of multi-layered brushes and brushes obtained by the process |
| EP1003269A1 (en) * | 1997-08-06 | 2000-05-24 | Mitsuba Corporation | Carbon commutator and method of producing the same |
| US6091051A (en) * | 1996-12-28 | 2000-07-18 | Minolta Co., Ltd. | Heating device |
| US20030047032A1 (en) * | 2001-06-22 | 2003-03-13 | Newman Keith E. | Method of producing powder metal parts from metallurgical powders including sponge iron |
| US20030094074A1 (en) * | 2001-10-25 | 2003-05-22 | Tris Inc. | Metal-graphite brush |
| US20030141777A1 (en) * | 2002-01-30 | 2003-07-31 | Tris Inc. | Copper-graphite brush |
| US20030190249A1 (en) * | 2002-04-04 | 2003-10-09 | Tris Inc. | Metal-graphite brush and production method thereof |
| US20040174088A1 (en) * | 2003-02-04 | 2004-09-09 | Kyoji Inukai | Multilayer brush |
| WO2005064756A1 (en) * | 2003-12-19 | 2005-07-14 | Hoffmann & Co. Elektrokohle Aktiengesellschaft | Carbon brush and method and material for the production thereof |
| US20060087197A1 (en) * | 2001-10-25 | 2006-04-27 | Tris Inc. | Metal-graphite brush |
| US20070042650A1 (en) * | 2003-08-01 | 2007-02-22 | Wilhelm Latz | Sliding electrical contact part |
| US20090261687A1 (en) * | 2006-02-08 | 2009-10-22 | Schunk Kohlenstofftechnik Gmbh | Method and device for manufacturing a multilayer compression moulded element |
| US7631206B2 (en) * | 2006-02-10 | 2009-12-08 | Intel Corporation | Method and apparatus to support enhanced energy efficiency in a processing system |
| US20100133951A1 (en) * | 2008-11-28 | 2010-06-03 | Schunk Kohlenstofftechnik Gmbh | Carbon brush for transmitting high currents |
| US20230006405A1 (en) * | 2019-11-25 | 2023-01-05 | Tris Inc. | Metal graphite grounding brush mainly composed of silver and method for producing same |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2840372C3 (en) * | 1978-09-16 | 1981-09-24 | Deutsche Carbone Ag, 6000 Frankfurt | Process and tool for the production of carbon brushes |
| IT1164343B (en) * | 1982-08-14 | 1987-04-08 | Mtu Muenchen Gmbh | ARRANGEMENT OF DISCRETE COMPONENTS, ESPECIALLY HEAT EXCHANGERS |
| GB9118968D0 (en) * | 1991-09-04 | 1991-10-23 | Morganite Elect Carbon | Electrically conductive bonding of carbon to metal |
| EP1128496B1 (en) | 2000-02-22 | 2008-12-10 | Denso Corporation | Method of manufacturing of a multi-layered brush of rotary electric machine |
| EP1507021A1 (en) * | 2003-08-15 | 2005-02-16 | Deutsche Carbone Ag | Method of applying a metallic coating on graphite discs or blocks and corresponding products |
| FR2972082B1 (en) | 2011-02-28 | 2013-03-29 | Mersen France Amiens Sas | CONTACT BROOM |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US661669A (en) * | 1898-07-22 | 1900-11-13 | Gen Electric | Connecting conductors to carbon brushes. |
| US764391A (en) * | 1903-07-15 | 1904-07-05 | Le Carbone Sa | Electrical connection. |
| US1053881A (en) * | 1911-09-21 | 1913-02-18 | Campbell Scott | Composition of matter. |
| US1067003A (en) * | 1909-08-16 | 1913-07-08 | Nat Carbon Co | Process of making electrical conductors. |
| US1633815A (en) * | 1925-09-14 | 1927-06-28 | Gen Electric | Electric terminal |
| US1708192A (en) * | 1927-05-07 | 1929-04-09 | Sherwood Charles Frederic | Manufacture of bodies from metal powder |
| US1712477A (en) * | 1926-05-03 | 1929-05-07 | Globar Corp | Electrical connection |
| US2092627A (en) * | 1935-04-27 | 1937-09-07 | Gen Electric | Carbon brush |
| US2098062A (en) * | 1935-04-26 | 1937-11-02 | Gen Electric | Carbon brush |
| US2319240A (en) * | 1940-03-19 | 1943-05-18 | Mallory & Co Inc P R | Electric contact and the like |
| US2353047A (en) * | 1942-04-04 | 1944-07-04 | Carter Carburetor Corp | Electric motor structure |
| US2989490A (en) * | 1958-02-19 | 1961-06-20 | Union Carbide Corp | Electrical contact brush for high altitude use |
-
1968
- 1968-05-23 GB GB2463768A patent/GB1259454A/en not_active Expired
-
1969
- 1969-05-16 US US825305A patent/US3601645A/en not_active Expired - Lifetime
- 1969-05-20 NL NL6907728A patent/NL6907728A/xx unknown
- 1969-05-22 DE DE19691926203 patent/DE1926203A1/en active Pending
- 1969-05-22 SE SE07256/69A patent/SE367735B/xx unknown
- 1969-05-22 FR FR6916784A patent/FR2009196A1/fr not_active Withdrawn
- 1969-05-22 ES ES367569A patent/ES367569A1/en not_active Expired
- 1969-05-23 BE BE733581D patent/BE733581A/xx unknown
- 1969-05-23 JP JP3965469A patent/JPS5311641B1/ja active Pending
- 1969-05-23 AT AT495169A patent/AT288535B/en not_active IP Right Cessation
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US661669A (en) * | 1898-07-22 | 1900-11-13 | Gen Electric | Connecting conductors to carbon brushes. |
| US764391A (en) * | 1903-07-15 | 1904-07-05 | Le Carbone Sa | Electrical connection. |
| US1067003A (en) * | 1909-08-16 | 1913-07-08 | Nat Carbon Co | Process of making electrical conductors. |
| US1053881A (en) * | 1911-09-21 | 1913-02-18 | Campbell Scott | Composition of matter. |
| US1633815A (en) * | 1925-09-14 | 1927-06-28 | Gen Electric | Electric terminal |
| US1712477A (en) * | 1926-05-03 | 1929-05-07 | Globar Corp | Electrical connection |
| US1708192A (en) * | 1927-05-07 | 1929-04-09 | Sherwood Charles Frederic | Manufacture of bodies from metal powder |
| US2098062A (en) * | 1935-04-26 | 1937-11-02 | Gen Electric | Carbon brush |
| US2092627A (en) * | 1935-04-27 | 1937-09-07 | Gen Electric | Carbon brush |
| US2319240A (en) * | 1940-03-19 | 1943-05-18 | Mallory & Co Inc P R | Electric contact and the like |
| US2353047A (en) * | 1942-04-04 | 1944-07-04 | Carter Carburetor Corp | Electric motor structure |
| US2989490A (en) * | 1958-02-19 | 1961-06-20 | Union Carbide Corp | Electrical contact brush for high altitude use |
Cited By (41)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3786292A (en) * | 1972-04-26 | 1974-01-15 | Morganite Carbon Ltd | An electrical contact brush assembly with anti-vibration head |
| US4101453A (en) * | 1976-03-20 | 1978-07-18 | Lucas Industries Limited | Sintered composition |
| US4131460A (en) * | 1976-03-20 | 1978-12-26 | Lucas Industries Limited | Method of producing a sintered composition |
| US4366361A (en) * | 1976-04-09 | 1982-12-28 | Lucas Industries Limited | Method of producing an electrical component |
| US5263562A (en) * | 1988-06-23 | 1993-11-23 | Hoffman & Co. Elektrokohle Gesellschaft M.B.H | Carbon brush for collector |
| US5152380A (en) * | 1988-06-23 | 1992-10-06 | Hoffmann & Co. Elektrokohle Gesellschaft Mbh | Collector shoe for collector and process for producing it |
| US5214335A (en) * | 1992-07-07 | 1993-05-25 | General Motors Corporation | Brush and slip ring apparatus for dynamoelectric machines |
| EP0627795A1 (en) * | 1993-06-04 | 1994-12-07 | Le Carbone Lorraine | A simplified method for producing brushes |
| FR2706089A1 (en) * | 1993-06-04 | 1994-12-09 | Lorraine Carbone | Simplified process for making brooms. |
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Also Published As
| Publication number | Publication date |
|---|---|
| BE733581A (en) | 1969-11-24 |
| DE1926203A1 (en) | 1969-11-27 |
| JPS5311641B1 (en) | 1978-04-24 |
| FR2009196A1 (en) | 1970-01-30 |
| ES367569A1 (en) | 1971-04-01 |
| NL6907728A (en) | 1969-11-25 |
| SE367735B (en) | 1974-06-04 |
| AT288535B (en) | 1971-03-10 |
| GB1259454A (en) | 1972-01-05 |
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