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Publication numberUS3867598 A
Publication typeGrant
Publication dateFeb 18, 1975
Filing dateOct 9, 1973
Priority dateOct 9, 1973
Also published asCA979961A1, DE2443872A1, US3864535
Publication numberUS 3867598 A, US 3867598A, US-A-3867598, US3867598 A, US3867598A
InventorsDobrosielski Stephen S, Richards Edward L
Original AssigneeWestinghouse Electric Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Control switch
US 3867598 A
Abstract
A switch device characterized by an overcenter toggle structure mounted on an electrically insulating housing, in which housing separable contacts are mounted for movement between open and closed circuit positions, and a connecting member between the toggle structure and the movable contact which connecting member extends through an opening in the housing and is movable therein rectilinearly between the open and closed positions to the stationary contact.
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Description  (OCR text may contain errors)

United States Patent 1 Richards et al.

[ Feb. 18, 1975 CONTROL SWITCH [75] Inventors: Edward L. Richards, Aliquippa; Stephen S. Dobrosielski, Beaver,

both of Pa.

[73] Assignee: Westinghouse Electric Corporation,

Pittsburgh, Pa.

[22] Filed: Oct. 9, 1973 211 Appl. No.: 404,579

[52] US. Cl. 200/153 G, 200/337 [51] Int. Cl. 1101b 3/46 [58] Field of Search..... 200/153 G, 332, 337, 153 T [5 6] References Cited UNITED STATES PATENTS 1,496,636 6/1924 Hilliard 200/153 G X 3,008,024 11/1961 Roeser 200/153 T X 3,187,120 6/1965 Akst 200/153 G X 3,243,565 3/1966 Sutton 200/337 X 3,569,655 3/1971 Jakubauskas. ZOO/337 X 3,649,785 3/1972 Dietrich 200/47 Primary Examiner-R0bert K. Schaefer Assistant ExaminerWilliam .1. Smith Attorney, Agent, or FirmL. P. Johns [57] ABSTRACT A switch device characterized by an overcenter toggle structure mounted on an electrically insulating housing, in which housing separable contacts are mounted for movement between open and closed circuit positions, and a connecting member between the toggle structure and the movable contact which connecting member extends through an opening in the housing and is movable therein rectilinearly between the open and closed positions to the stationary contact.

11 Claims, 2 Drawing Figures CONTROL SWITCH CROSS REFERENCE TO RELATED APPLICATIONS As shown in FIG. 1 a manually operated switch is The invention is related to the invention disclosed in 5 generally indicated at and it comprises a base or the application of Edward L. Richards and Stephen S. Dobrosielski, Ser. No. 410,154, filed Oct. 26, 1973 BACKGROUND OF THE INVENTION l. Field of the Invention This invention relates to a switch device and, more particularly, it pertains to a toggle-operated switch which provides for fast closing and opening of circuit contacts.

2. Description of the Prior Art I-Ieretofore, the overcenter toggle mechanism has been used primarily for operating one or more contact arms of the clapper type, on each of which arms a single contact is mounted for movement through an arc between open and closed positions with a stationary contact. A disadvantage of that type of switch is that intensity of an electric arc incurred during the opening of a circuit is concentrated at each contact.

Associated with the foregoing has been the problem of imparting fast-acting movement to circuit breaker contacts in order to, among other reasons, minimize the duration of the arc generated.

SUMMARY OF THE INVENTION In accordance with this invention it has been found that the foregoing problems may be overcome by providing a switch device comprising an electrically insulating housing and an overcenter toggle structure mounted on the external surface of the housing, the housing having an aperture therethrough, a plurality of sets of contacts within the housing and comprising stationary contacts and movable contacts between open and closed positions with the stationary contacts, a connecting member pivotally connecting the overcenter toggle structure to the set of movable contacts, the connecting member extending through the aperture in the housing and being slidably movable therein to effect rectilinear movement between the movable contacts and the stationary contacts, the overcenter toggle structure comprising upper and lower links and a laterally movable handle and the upper and lower links being movable through arcuate paths which movements are converted to the rectilinear movement of the movable contacts by the connecting member.

The advantage of the switch device of this invention is that it combines the advantages of a double pole contactor and the overcenter toggle-mechanism of a circuit breaker to provide for a manually operated control switch in which the lateral movement of the handle to the off and on positions moves the contacts longitudinally with respect to each other. The switch device is particularly adaptable to a miniaturized three-pole 600 volt manually operated motor control switch, because the overcenter toggle mechanism provides for fast closing and opening of the double circuit contact members.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a side view partly in section showing the switch device of this invention; and

FIG. 2 is a vertical sectional view taken on the line 11-11 of FIG. 1.

electrically insulating housing 12 and a-manually operated over-center toggle mechanism 14. The base or housing 12 is a box-like member having opposite side and end walls as well as partitions having opposite side and end walls as well as partitions 16 (FIG. 2) for separating the contact areas of the three poles. The housing 12 also comprises a cover 18 on which the toggle mechanism 14 is securely mounted. In turn, the cover 18 is secured by suitable means such as screws 20 at the corners of the cover.

Terminals 22 and 24 are located at opposite ends of each pole compartment and include conductor portions 26 and 28 as well as stationary contacts 30 and 32. The assembly of the terminals, conductor portions, and stationary contacts for each pole constitute a stationary contact structure.

A movable contact structure is located within the housing 12 and comprises a crossbar 34 on which a plurality of, such as three, movable contact carriers are mounted. Each carrier comprises a pair of movable contacts 38 and 40 and are moved vertically, or rectilinearly, with respect to the stationary contacts 30 and 32, respectively. The particular construction of the contact carrier 36 as well as the manner in which the movable contacts are mounted is shown more particularly in US. Pat. No. 3,727,157. Thus, the contact carrier 36 is movable between the closed and open circuit positions such as shown by the solid and broken line positions of FIG. 1. The assembly of the crossbar 34, the contact carrier 36 and the contacts 38, 40 constitute the movable contact structure which together with the stationary contact structure are contained within the housing 12.

In accordance with this invention the toggle mechanism is disposed externally of the housing 12 and includes a pair of upright frames 42 and 44 (FIG. 2), an overcenter toggle structure generally indicated at 46, and a manual handle 48. Each frame 42, 44 comprises a base flange 50 which is secured to the cover 18 by suitable means such as base screws 52. Each frame 42, 44 comprises a V-shaped notch 54.

The overcenter toggle structure 46, being similar to overcenter toggle structure, such as shown in US. Pat. No. 3,263,042, comprises an operating lever 56, a pair of toggle springs 58, a pair of closely spaced latch plates 60,'upper toggle links 62, lower toggle links 64, and a connecting member 66. As shown in FIG. 2 the operating lever 56 is an inverted U-shaped member, the lower ends of which are seated at the apex of the V- shaped notches 54 at 66 (FIG. 1). The handle 48 is mounted on the upper portion of the latch plates 60 which are secured in place between the frames 42, 44 and which provide pivotal support at 70 for the upper ends of the upper toggle link 62. The lower ends of the links 62 are pivoted at 72 to the lower toggle links 64 which in turn are pivotally secured by pivot pins 74 to the connector member 68.

The toggle mechanism 14 operates in a manner similar to other overcenter toggle mechanisms, whereby it is movable from the closed circuit position of the contacts 30, 32, 38, 40 to the open circuit position as indicated by the broken lines position 36a. Thus, when the handle 48 is moved from the on position (FIG. 2) to the of position, the contact carrier 36 moves to the open circuit position 36a.

In accordance with this invention the connector member 68 is preferably a rectangular member which extends through opening means such as a rectangular opening 76 in the cover 18. Sufficient clearance between the walls of the cover forming an opening 76 and the surfaces of the connector member 68 is provided to enable sliding movement vertically of the member. However, the clearance between the members 68 and the walls of the holes 76 are sufficiently small to enable said walls to serve as a guide means for the member; so that when the overcenter toggle structure 46 is moved to the off" position, the lower links 64 move to the broken line position 64a (FIG. 1), thereby raising the connector member 68 to the broken line position 680 and thereby lifting the contact carrier 36 to the open circuit position 36a. As shown in FIG. 1, the connector member 68 includes a notch 78 ofinterlocking configuration such as a T-shape and the crossbar 34 includes a corresponding T-shaped member 80 which is seated in the notch 78.

Accordingly, the switch device of this invention comprises an overcenter toggle mechanism the toggle links of which are movable in conventional arcuate paths, which motions are converted to longitudinal or rectilinear motions of the connector member and the associated crossbar 34.

What is claimed is:

l. A switch device comprising an electrically insulating housing having housing walls, at least one of the walls having an opening, a stationary contact structure within the housing, a movable contact structure within the housing and being movable rectilinearly between open and closed positions relative to the stationary contact structure, operating mechanism for the movable contact structure external of the housing and comprising an operating lever and a switch handle thereon for manually moving the operating lever, the operating mechanism also comprising an overcenter toggle operable by the operating lever to effect movement of the movable contact structure, a connecting member operatively connected between the movable contact structure and the overcenter toggle, the connecting member extending through said opening and comprising upper and lower toggle links and the lower toggle link being pivotally connected to the connecting member, the upper and lower toggle links being movable arcuately, the overcenter toggle also comprising spring means extending between the pivotal connection to the connecting member and the lever adjacent to the switch handle.

2. The switch device of claim 1 in which the connecting member is pivotally connected at one end to the overcenter toggle.

3. The switch device of claim 1 in which the surfaces of the wall forming the opening providing guide means for the connecting member.

4. The switch device of claim 1 in which the pivotal connection between the lower toggle link and the connecting member converts the arcuate movement of the links to rectilinear movement of the connecting member.

5. The switch device ofclaim 4 in which the connecting member is slidably movable rectilinearly in the opening in response to actuation of the overcenter toggle.

6. A switch device comprising an electrically insulating housing and an overcenter toggle structure, said housing comprising walls forming a chamber, a stationary contact structure within the housing, a movable contact structure within the housing and movable rectilinearly between open and closed positions relative to the stationary contact structure, the overcenter toggle structure being mounted externally on the housing and comprising a connecting member and a pair of links movable in arcuate paths and the connecting member being pivotally connected to one of the links to effect movement of the member rectilinearly, the overcenter toggle structure also comprising spring means for biasing the overcenter toggle structure in positions corresponding to the open and closed positions of the movable contact structure, the connecting member being pivotally connected between the pair of links and the movable contact structure, and opening means in the one wall communicating with the chamber for guiding movement of the connecting member.

7. The switch device of claim 6 in which surfaces ofv the opening -means are parallel to the direction of movement of the movable contact structure.

8. The switch device of claim 7 in which the pair of links comprise upper and lower links operatively connected together for arcuate movement, and the connecting member is movable in the opening means.

9. A switch device comprising an electrically insulating housing and an overcenter toggle structure on the housing, a plurality of sets of contacts within the housing and comprising stationary contacts and movable contacts movable between open and closed positions with the stationary contacts, pivotal means for pivotally connecting the overcenter toggle structure to the set of movable contacts, the pivotal means comprising a connecting member, an opening in the housing, the connecting member extending through the opening and being slidably movable therein, the over-center toggle structure comprising upper and lower links and spring means, the lower link being pivotally connected to the connecting member, the spring means being operatively connected to the links for biasing the overcenter toggle structure in positions corresponding to the open and closed positions of the movable contacts, and the overcenter toggle structure comprising a handle movablepivotally to effect rectilinear movement of the contacts in the direction of movement of the movable contacts.

10. The switch device of claim 9 in which movable contacts are mounted on a crossbar, and in which the crossbar is mounted on the connecting member and within the housing.

11. The switch device of claim 10 in which the crossbar moves rectilinearly with respect to the stationary contacts.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1496636 *Jul 8, 1921Jun 3, 1924Gen ElectricAutomatically locked open and closed circuit breaker
US3008024 *Jan 12, 1959Nov 7, 1961Illinois Tool WorksToggle switch mechanism
US3187120 *Oct 8, 1962Jun 1, 1965Burroughs CorpMulti-contact manually-operated electric switch with lever actuating means
US3243565 *Jul 22, 1964Mar 29, 1966Gen ElectricPivotal switch-operating assembly
US3569655 *Dec 1, 1969Mar 9, 1971Jakubauskas Alexander JRoller-actuated switch-operating assembly
US3649785 *Jul 30, 1969Mar 14, 1972Arrow Hart IncElectrical limit switch
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4011423 *Sep 12, 1975Mar 8, 1977I-T-E Imperial CorporationCommon reset extension for plurality of overload relays
US4146766 *Apr 25, 1977Mar 27, 1979Associated Electrical Industries LimitedActuating mechanisms for vacuum interrupters
US4945194 *Jan 24, 1989Jul 31, 1990Elektro-Apparatebau Olten AgElectric multiple switch assembly with pushbutton actuator and force transmitting insert
US6535377 *Mar 28, 2001Mar 18, 2003Bull S.A.Power distribution unit for electrical devices
US7115829 *Sep 16, 2004Oct 3, 2006Moeller Gebäudeautomation KGSwitch
DE2838630A1 *Sep 5, 1978Mar 8, 1979Square D CoMehrpoliger niederspannungsschalter mit ueberstromausloesung
EP0049550A1 *Oct 2, 1981Apr 14, 1982B.V. Hollandse Apparatenfabriek "H.A.F."Automatic switching device
Classifications
U.S. Classification200/449, 200/337, 200/466
International ClassificationH01H23/16, H01H23/00, H01H23/02, H01H9/00
Cooperative ClassificationH01H23/164, H01H23/162, H01H9/0066, H01H9/00, H01H23/02
European ClassificationH01H9/00C, H01H23/02, H01H9/00, H01H23/16B, H01H23/16C