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Patentes

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Número de publicaciónUS3598943 A
Tipo de publicaciónConcesión
Fecha de publicación10 Ago 1971
Fecha de presentación1 Dic 1969
Fecha de prioridad1 Dic 1969
También publicado comoCA921958A1, DE2058658A1
Número de publicaciónUS 3598943 A, US 3598943A, US-A-3598943, US3598943 A, US3598943A
InventoresBarrett Edward L
Cesionario originalIllinois Tool Works
Exportar citaBiBTeX, EndNote, RefMan
Enlaces externos: USPTO, Cesión de USPTO, Espacenet
Actuator assembly for toggle switch
US 3598943 A
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Descripción  (El texto procesado por OCR puede contener errores)

United States Patent Inventor Edward L. Barrett La Grange Park, 111. Appl. No. 881,049 Filed Dec. 1, 1969 Patented Aug. 10, 1971 Assignee lllino'm Tool Works Inc. Chicago, Ill.

ACTUATOR ASSEMBLY FOR TOGGLE SWITCH 4 Claims, 4 Drawing Figs.

References Cited UNITED STATES PATENTS 2,961,505 11/1960 Alio et a1. 200/68 UX 2,972,663 2/1961 Zanichkowsk et a1. 200/68 X 3,351,729 11/1967 Bergman 200/68 X FOREIGN PATENTS 1,306,612 9/1962 France ..200/67 D (UX) Primary Examiner-David Smith, Jr. Att0rneys-Robert W. Beart, Michael Kovac, Barry L. Clark and Jack R. Halvorsen ABSTRACT: Actuator assembly for snap action toggle switch has a rockerlike actuator member which is pivoted on a transverse axis. A roller mounted on the actuator member is adapted to be engaged for overcenter movement of the actuator at a point spaced from the pivot axis of the actuator member by a member on the end of the toggle lever having a curved outer surface resiliently biased into engagement with the roller. By the use of a pair of curved cooperating surfaces to cause overcenter movement, at least one of which is a 2,633,510 3/1953 Schellman 200/68 roller, which contact each other intermediate their respective 2,769,050 10/1956 Boume ZOO/67.7 UX pivot mountings, a very unstable teaseproof mounting is pro- 2,780,691 2/1957 Landin ZOO/67.7 UX vided.

,1: 48 I g l I/ I I I I I I I I l 64 62 1 64 52 1 l 54 I X i 70 60 I r T 58 4o 0 74 5 I L .\..Li

24 I4 I I r," 26

ACTUATOR ASSEMBLY FOR TOGGLE SWITCH BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to electrical switches and particularly to an actuator assembly for a snap action toggle switch which is teaseproof.

2. Description of the Prior Art Electrical toggle switcheshaving a spring-biased roller type of cam follower on the toggle lever have been used to cause a rocking movement of a pivoted actuator member having a cam surface thereon engageable with the roller to cause an overcenter movement of the actuator as shown in Landin U.S.

Pat. No. 2,780,691 or Puccini U.S. Pat. No. 3,322,914. Since the pivot axes for the toggle lever and for the rocking actuator member in Landin U.S. Pat. No. 2,780,691 are both on one side of the point of contact between the roller and cam surface the actuator assembly would not be as unstable or resistant to teasing as would be an assembly wherein the respective roller and cam-contacting surfaces were intermediate the pivot points of the two pivoted members. Schellman U.S. Pat. No. 2,633,510 shows a roller in association with a contact member wherein the mounting for the roller is not pivoted but is mounted on one end of a spring. The roller member in Schellman would have no positive overcenter position since its wobbly spring mounting would cause its effective pivot point to shift with the changes in loading applied to the anchored end of the spring as it is bent.

SUMMARY The toggle-type actuator assembly of the present invention includes a toggle lever pivotally mounted in the cover of a switch housing and a cradlelike actuator member pivotally rockable about an axis transverse of its length in a U-shaped support bracket affixed to the bottom of the switch housing. The ends of the actuator member may carry movable switch contacts which are adapted to contact fixed switch contacts in the housing. In a modified form of the invention, the ends of the cradlelike actuator member may be used to depress thepushbuttons of one or more switches affixed to the housing.

The actuator member is formed with a pair of upwardly extending trunnions which cradle and support the shaft of a roller mounted therein in such a manner that the axis of the roller is positioned parallel to the pivot axis of the actuator member and in a plane generally perpendicular to the general plane of the actuator which includes the pivot axis of the actuator. The roller on the actuator member is adapted to be engaged, to cause overcenter movement of the actuator member, by a spring-loaded cam member which is telescopically mounted within the toggle lever. The cam member on the toggle lever may be of various shapes such as, for example, a bullet-nosed member which is biased into contact with the roller at all times. When the cam member in the toggle lever is moved, by movement of the toggle lever, past a line connecting the actuator member pivot axis, and the roller pivot axis, it will cause an overcenter snap movement of the roller and actuator member about the actuator member pivot axis which will drive the actuator member to its opposite extreme position. Due to the presence of the roller member on the actuator, the mechanism is extremely teaseproof since the roller will roll as the cam member on the toggle lever is moved along its surface. By having the pivot axis for the actuator member and the pivot axis for the toggle lever positioned at points on opposite sides of the point of contact between the cam member and the roller member, the assembly is extremely unstable from the standpoint that it is almost impossible to tease as compared to having both pivot axes on the same side of the point of contact.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a switch housing incorporating the improved actuator assembly taken on the line l-l of FIG. 2, except that the working parts other than the toggle lever are left whole;

FIG. 2 is an end sectional view taken on the line 2-2 of FIG.

FIG. 3 is an exploded view showing the relationship between the roller, the actuator member and the actuator member support bracket; and

FIG. 4 is a diagrammatical side view of a modified form of actuator assembly wherein the actuator member operates the pushbuttons for a plurality of switches rather than carrying self-contacts as in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1, the improved actuator assembly indicated generally at 10 is mounted in a switch housing indicated generally at 12 which supports a pair of fixed contacts l4, 16 which are respectively integrally fastened to external terminal members 18, 20. A common terminal element 22 is affixed to the housing and to a generally U-shaped bracket 24 therein by means of a rivet 26. The U-shaped bracket member 24 has a pair of inwardly projecting deformations 28 which comprise pivot centers adapted to be engaged by mating depressions 30 formed in the opposite sides of actuator member 32. Arranged centrally of the actuator member 32 and attached thereto is a cradle support bracket 34 having a pair of trunnions 36 which engage the shaft ends 38 of a roller member 40. Movable contact members 42, 44 are attached at opposite ends of the actuator member 32 for selective engagement with the fixed contact members 14, 16.

A toggle lever 48 for operating the switch is pivotally mounted in the switch cover member indicated generally at 50. The cover member 50 comprises an upper plate member 52 having upwardly extending spherically shaped deformations 54 for engaging a spherical surface 56 formed on the toggle lever. Attached to the upper plate member 52 is a lower plate member 58 having downwardly extending spherically shaped deformed portions 60 adapted to engage the lower portion of the spherical surface 56 on the toggle lever 48. In order to maintain a firm mounting for the spherical portion 56 of the toggle lever 48 in plates 52, 58, astrip of resilient material 62 such as rubber is positioned between the plates 52 and 58 to permit the spherical deformations 54 and 60 to be maintained in slight compressive relationship with the toggle lever. The layers 52, 58 and 62 of the cover 50 may be held together by means such as rivets 64. Mounted in telescopic relationship with the toggle lever 48 is a bullet nosed fiber cam member 70 including a conical cam surface 72 terminating at its end in a spherical tip portion 74.

In operation of the actuator assembly, the toggle lever is pivoted from its solid line position shown in FIG. 1 to the second dotted position shown. During this movement, the cam member 70 is moved upwardly against the force of spring 76 as cam surface 72 moves upwardly along the surface of roller 40. Since the roller 40 has its shaft mounted in trunnions 36, it is free to rotate as cam surfaces 72 and 74 move over it with very little friction being produced to counteract the move ment of toggle lever 48. Furthermore, the lifting of the cam member 70 against the force of spring 76 will increase the force exerted on the roller 40 and the actuator 32 which in turn will tend to increase the force with which movable contact 42 bears on fixed contact 14. This increased force on the contacts will be released instantaneously and the movable contact 44 will be snapped into engagement with fixed contact 16 as the point of tangency between cam tip 74 and roller 40 passes through the point a on the roller. Point a is the overcenter point at which the point of tangency is in line with the line b which passes through the axis of the actuator pivot 28 and the roller shaft 38. By insuring that the contact force does not drop off during a switching operation, the switch can provide long operational life without arcing.

By mounting roller 40, as shown in FIG. 1, so that the axis of its support shaft 38 and its point of tangency a with the cam surface 74 is intermediate the pivot point for the toggle lever 48 and the actuator pivot point 28, the cam member 70 and the roller 40 are in an extremely unstable relationship to each other as cam tip 74 approaches the line b at which the actuator member 32 will snap overcenter. This unstable situation is enhanced by the fact that the cam member 70 is at its extreme upward position at this time so that it exerts the most spring force on the roller. Furthermore, since each of the surfaces 74 and 40 are curved and in rolling contact as they pass line b, there is no sliding friction present to impede the snap action of the actuator member 32 as would be the case if the respective contacting members were in sliding rather than rolling relationship.

in FIG. 4, the actuator assembly of the invention is diagrammatically shown in association with a pair of pushbutton switches'80, 82 having pushbuttons 84, 86 respectively, for operating the electrical contacts within them. Since certain users of switches specify that the axis of the toggle lever point to the contacts which are closed (a condition not met by the embodiment of FIG. 1 wherein pivot axis 28 is below, rather than above the axis of roller shaft 38), it should be noted that the embodiment of FIG. 4 wherein the actuator member 32 merely actuates other switches rather than carrying contacts could be used since the switches 80, 82 can readily be obtained with contacts which are either in a normally open or a normally closed position.

lclaim:

1. In an actuator assembly for making and breaking the contacts of an electric switch having a housing, a toggle lever member pivoted in the housing and an actuator member pivoted in the housing and engageable by the toggle lever to cause the switch contacts to be moved relative to each other,

the improvement comprising: pivot means mounted in said housing for supporting said actuator member, at least one roller mounted on said actuator member for rotational movement about an axis thereon spaced at a fixeddistance from the axis of said pivot means for said actuator member, the axis of the roller being positioned intermediate a cooperating member for engaging the roller and the axis of the actuator member pivot means, said cooperating member being resiliently biased into engagement with said actuator member and mounted for movement on the toggle lever in the direction of the length of the toggle lever, said cooperating member having a generally conical shape terminating in a generally spherically shaped apex tip which is resiliently biased into continuous rolling engagement with said roller on said actuator member and adapted to rock said actuator in one direction or the other as it moves past a point on said at least one roller which is in line with the axis of the roller and the axis of said pivot means.

2. An actuator assembly as defined in claim 1 wherein said actuator member comprises arocking plate carrying a contact at at least one of its ends, said contact on said rocking plate being movable into and out of engagement with a fixed contact mounted in the housing.

3. An actuator assembly as defined in claim 2 wherein said rocking plate has contacts on each of its ends adapted to be brought into alternate engagement with a pair of cooperating fixed contacts in thehousing.

4. An actuator assembly as defined in claim 3 wherein the rocking plane is mounted within a U-shaped bracket member having a pair of inwardly projecting spherical deformations defining pivot centers which are engaged by mating depressions formed on opposite sides of the actuator member.

Citas de patentes
Patente citada Fecha de presentación Fecha de publicación Solicitante Título
US2633510 *13 Sep 195131 Mar 1953Hetherington IncElectric switch
US2769050 *25 Abr 195530 Oct 1956Rotax LtdPush-button electric switches
US2780691 *9 Feb 19555 Feb 1957Hart Mfg CoElectric switch
US2961505 *10 Jul 195922 Nov 1960Allied Control CoToggle switch
US2972663 *3 Feb 195821 Feb 1961Allied Control CoToggle switch
US3351729 *20 Jun 19667 Nov 1967Saab AbSwitch means for selective control of plural circuits
FR1306612A * Título no disponible
Citada por
Patente citante Fecha de presentación Fecha de publicación Solicitante Título
US3806910 *19 Oct 197223 Abr 1974Check Mate Syst IncProduct monitoring device and system
US4147908 *30 Dic 19763 Abr 1979Swann David AElectric switches
US4190750 *11 May 197826 Feb 1980Eaton CorporationSnap-action switch of the roller contact type
US4215257 *20 Nov 197829 Jul 1980Otto Engineering, Inc.Precision toggle switch
US5382768 *13 Nov 199217 Ene 1995Leviton Manufacturing Co., Inc.Rocker-type electrical switch
US5500498 *17 Ene 199519 Mar 1996Liviton Manufacturing Co., Inc.Rocker-type electrical switch
US5597989 *11 Mar 199628 Ene 1997Kabushiki Kaisha Tokai Rika Denki SeisakushoSwitch assembly including cam operated pivoted contact
US5630502 *21 Feb 199620 May 1997Leviton Manufacturing CoRocker-type electrical switch
US5847638 *11 Jun 19968 Dic 1998Sorenson; Richard W.Thermal circuit protector and switch
US6686550 *12 Ago 20023 Feb 2004Niles Parts Co., Ltd.Switch
US7518078 *21 Mar 200714 Abr 2009Cooper Technologies CompanyFlipper mechanism
US759546021 Mar 200729 Sep 2009Cooper Technologies CompanyActuator assembly
US763872321 Mar 200729 Dic 2009Cooper Technologies CompanyToggle flange
US770976121 Mar 20074 May 2010Cooper Technologies CompanyElectrical device cradle with multiple integral support regions
US77282408 Nov 20071 Jun 2010Cooper Technologies CompanyElectrical control device
US773737721 Mar 200715 Jun 2010Cooper Technologies CompanySlip connection
US7819299 *4 Jun 200726 Oct 2010Ethicon Endo-Surgery, Inc.Surgical instrument having a common trigger for actuating an end effector closing system and a staple firing system
US78324084 Jun 200716 Nov 2010Ethicon Endo-Surgery, Inc.Surgical instrument having a directional switching mechanism
US7838788 *19 Sep 200723 Nov 2010Abb Patent GmbhElectrical switching device having at least one contact point
US79053804 Jun 200715 Mar 2011Ethicon Endo-Surgery, Inc.Surgical instrument having a multiple rate directional switching mechanism
US81134109 Feb 201114 Feb 2012Ethicon Endo-Surgery, Inc.Surgical stapling apparatus with control features
US81571534 Feb 201117 Abr 2012Ethicon Endo-Surgery, Inc.Surgical instrument with force-feedback capabilities
US816197723 Sep 200824 Abr 2012Ethicon Endo-Surgery, Inc.Accessing data stored in a memory of a surgical instrument
US816718518 Nov 20101 May 2012Ethicon Endo-Surgery, Inc.Surgical instrument having recording capabilities
US81721244 Feb 20118 May 2012Ethicon Endo-Surgery, Inc.Surgical instrument having recording capabilities
US818655531 Ene 200629 May 2012Ethicon Endo-Surgery, Inc.Motor-driven surgical cutting and fastening instrument with mechanical closure system
US818656016 Oct 200929 May 2012Ethicon Endo-Surgery, Inc.Surgical stapling systems and staple cartridges for deploying surgical staples with tissue compression features
US819679513 Ago 201012 Jun 2012Ethicon Endo-Surgery, Inc.Disposable motor-driven loading unit for use with a surgical cutting and stapling apparatus
US81967963 Feb 201112 Jun 2012Ethicon Endo-Surgery, Inc.Shaft based rotary drive system for surgical instruments
US82921552 Jun 201123 Oct 2012Ethicon Endo-Surgery, Inc.Motor-driven surgical cutting and fastening instrument with tactile position feedback
US831707028 Feb 200727 Nov 2012Ethicon Endo-Surgery, Inc.Surgical stapling devices that produce formed staples having different lengths
US834813129 Sep 20068 Ene 2013Ethicon Endo-Surgery, Inc.Surgical stapling instrument with mechanical indicator to show levels of tissue compression
US836029729 Sep 200629 Ene 2013Ethicon Endo-Surgery, Inc.Surgical cutting and stapling instrument with self adjusting anvil
US836597629 Sep 20065 Feb 2013Ethicon Endo-Surgery, Inc.Surgical staples having dissolvable, bioabsorbable or biofragmentable portions and stapling instruments for deploying the same
US83979715 Feb 200919 Mar 2013Ethicon Endo-Surgery, Inc.Sterilizable surgical instrument
US841457719 Nov 20099 Abr 2013Ethicon Endo-Surgery, Inc.Surgical instruments and components for use in sterile environments
US84247404 Nov 201023 Abr 2013Ethicon Endo-Surgery, Inc.Surgical instrument having a directional switching mechanism
US845952010 Ene 200711 Jun 2013Ethicon Endo-Surgery, Inc.Surgical instrument with wireless communication between control unit and remote sensor
US845952514 Feb 200811 Jun 2013Ethicon Endo-Sugery, Inc.Motorized surgical cutting and fastening instrument having a magnetic drive train torque limiting device
US846492328 Ene 201018 Jun 2013Ethicon Endo-Surgery, Inc.Surgical stapling devices for forming staples with different formed heights
US84799699 Feb 20129 Jul 2013Ethicon Endo-Surgery, Inc.Drive interface for operably coupling a manipulatable surgical tool to a robot
US848541229 Sep 200616 Jul 2013Ethicon Endo-Surgery, Inc.Surgical staples having attached drivers and stapling instruments for deploying the same
US849999312 Jun 20126 Ago 2013Ethicon Endo-Surgery, Inc.Surgical staple cartridge
US851724314 Feb 201127 Ago 2013Ethicon Endo-Surgery, Inc.Surgical instrument with wireless communication between control unit and remote sensor
US85345281 Mar 201117 Sep 2013Ethicon Endo-Surgery, Inc.Surgical instrument having a multiple rate directional switching mechanism
US854012811 Ene 200724 Sep 2013Ethicon Endo-Surgery, Inc.Surgical stapling device with a curved end effector
US85401308 Feb 201124 Sep 2013Ethicon Endo-Surgery, Inc.Disposable motor-driven loading unit for use with a surgical cutting and stapling apparatus
US856765628 Mar 201129 Oct 2013Ethicon Endo-Surgery, Inc.Staple cartridges for forming staples having differing formed staple heights
US85734619 Feb 20125 Nov 2013Ethicon Endo-Surgery, Inc.Surgical stapling instruments with cam-driven staple deployment arrangements
US85734659 Feb 20125 Nov 2013Ethicon Endo-Surgery, Inc.Robotically-controlled surgical end effector system with rotary actuated closure systems
US858491914 Feb 200819 Nov 2013Ethicon Endo-Sugery, Inc.Surgical stapling apparatus with load-sensitive firing mechanism
US859076229 Jun 200726 Nov 2013Ethicon Endo-Surgery, Inc.Staple cartridge cavity configurations
US86022871 Jun 201210 Dic 2013Ethicon Endo-Surgery, Inc.Motor driven surgical cutting instrument
US86022889 Feb 201210 Dic 2013Ethicon Endo-Surgery. Inc.Robotically-controlled motorized surgical end effector system with rotary actuated closure systems having variable actuation speeds
US860804510 Oct 200817 Dic 2013Ethicon Endo-Sugery, Inc.Powered surgical cutting and stapling apparatus with manually retractable firing system
US86164319 Feb 201231 Dic 2013Ethicon Endo-Surgery, Inc.Shiftable drive interface for robotically-controlled surgical tool
US862227414 Feb 20087 Ene 2014Ethicon Endo-Surgery, Inc.Motorized cutting and fastening instrument having control circuit for optimizing battery usage
US86361873 Feb 201128 Ene 2014Ethicon Endo-Surgery, Inc.Surgical stapling systems that produce formed staples having different lengths
US863673614 Feb 200828 Ene 2014Ethicon Endo-Surgery, Inc.Motorized surgical cutting and fastening instrument
US865212010 Ene 200718 Feb 2014Ethicon Endo-Surgery, Inc.Surgical instrument with wireless communication between control unit and sensor transponders
US865717414 Feb 200825 Feb 2014Ethicon Endo-Surgery, Inc.Motorized surgical cutting and fastening instrument having handle based power source
US86571789 Ene 201325 Feb 2014Ethicon Endo-Surgery, Inc.Surgical stapling apparatus
US866813024 May 201211 Mar 2014Ethicon Endo-Surgery, Inc.Surgical stapling systems and staple cartridges for deploying surgical staples with tissue compression features
US86722085 Mar 201018 Mar 2014Ethicon Endo-Surgery, Inc.Surgical stapling instrument having a releasable buttress material
US868425327 May 20111 Abr 2014Ethicon Endo-Surgery, Inc.Surgical instrument with wireless communication between a control unit of a robotic system and remote sensor
US87465292 Dic 201110 Jun 2014Ethicon Endo-Surgery, Inc.Accessing data stored in a memory of a surgical instrument
US874653028 Sep 201210 Jun 2014Ethicon Endo-Surgery, Inc.Surgical instrument with wireless communication between control unit and remote sensor
US874723828 Jun 201210 Jun 2014Ethicon Endo-Surgery, Inc.Rotary drive shaft assemblies for surgical instruments with articulatable end effectors
US875274720 Mar 201217 Jun 2014Ethicon Endo-Surgery, Inc.Surgical instrument having recording capabilities
US875274927 May 201117 Jun 2014Ethicon Endo-Surgery, Inc.Robotically-controlled disposable motor-driven loading unit
US87638756 Mar 20131 Jul 2014Ethicon Endo-Surgery, Inc.End effector for use with a surgical fastening instrument
US87638791 Mar 20111 Jul 2014Ethicon Endo-Surgery, Inc.Accessing data stored in a memory of surgical instrument
US87835419 Feb 201222 Jul 2014Frederick E. Shelton, IVRobotically-controlled surgical end effector system
Clasificaciones
Clasificación de EE.UU.200/437, 200/553, 200/573
Clasificación internacionalH01H23/24, H01H23/16, H01H23/00
Clasificación cooperativaH01H23/168
Clasificación europeaH01H23/16E