Patent US3781728A successfully refreshed from Google Patents.
US3781728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric contactor
Assignee: Westinghouse Electric Corp
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Filing: 1972-10-06
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Granted: 1973-12-25
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Expires: 1992-10-06
Abstract
Abstract An electric contactor characterized by improvements including a movable contact carrier structure having a one piece bridge between a pair of movable contacts, the outer ends of which bridge are curved outwardly away from the corresponding stationary contacts, a magnetic coil for actuating the movable contact carrier structure and being embedded in an aluminum die cast base which serves as a better heat sink for the coil, an interlock between the cover and housing of the contactor for preventing operation of the contactor when a cover is removed, and a guide pin for the crossbar of the movable contact carrier structure which guide pin comprises a screw insert for the screw by which the cover is attached to the housing.
Inventors
- 👤 K Grunert
- 👤 J Dauer
- 👤 S Dobrosielski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:03
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/34; H01H9/345; H01H50/00; H01H50/16; H01H50/18; H01H50/20; H01H50/22; H01H50/54; H01H50/546
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
331 words
A contactor comprising an insulating housing, a cover detachably mounted on the housing, a stationary contact structure within the housing, a movable contact carrier structure within the housing and movable between open and closed positions relative to the stationary contact structure, biasing means for holding the movable contact carrier structure in one of the positions, electromagnetic means for actuating the contact carrier structure to the other of the positions and comprising a magnetic armature, a magnetic core, and a coil, means for detachably mounting the cover on the housing, interlock means for preventing movement of the movable carrier structure when the cover is removed from the housing, the interlock means comprising a flexible member movable into and out of a locking position in the path of travel of the movable contact carrier structure, the flexible member being mounted on the housing and being biased in the locked position, the cover having a projecting portion for holding the flexible member in the unlocked position when the cover is mounted on the housing, the electromagnetic means actuates the movable contact carrier structure to the closed position, the flexible member comprising one portion attached to the housing, another portion in the path of movement of the movable contact carrier structure and an intermediate portion inclined at an angle across the position otherwise occupied by the projecting portion when the cover is mounted on the housing, the flexible member comprises a pair of oppositely disposed and oppositely movable end portions movable into and out of the locking position of the movable contact carrier structure, the movable contact carrier structure comprises an apertured guide member, a guide pin on the housing and disposed in the apertured guide member, the guide pin having an end portion embedded in the insulating housing and having a threaded aperture in said end portion, a screw clampingly engaging the cover and seated in threaded aperture, and the flexible member being attached on periphery of the end portion of the guide pin.
Claim 2
Dependent Claim
331 words
A contactor comprising an insulating housing, a cover detachably mounted on the housing, a stationary contact structure within the housing, a movable contact carrier structure within the housing and movable between open and closed positions relative to the stationary contact structure, biasing means for holding the movable contact carrier structure in one of the positions, electromagnetic means for actuating the contact carrier structure to the other of the positions and comprising a magnetic armature, a magnetic core, and a coil, means for detachably mounting the cover on the housing, interlock means for preventing movement of the movable carrier structure when the cover is removed from the housing, the interlock means comprising a flexible member movable into and out of a locking position in the path of travel of the movable contact carrier structure, the flexible member being mounted on the housing and being biased in the locked position, the cover having a projecting portion for holding the flexible member in the unlocked position when the cover is mounted on the housing, the electromagnetic means actuates the movable contact carrier structure to the closed position, the flexible member comprising one portion attached to the housing, another portion in the path of movement of the movable contact carrier structure and an intermediate portion inclined at an angle across the position otherwise occupied by the projecting portion when the cover is mounted on the housing, the flexible member comprises a pair of oppositely disposed and oppositely movable end portions movable into and out of the locking position of the movable contact carrier structure, the movable contact carrier structure comprises an apertured guide member, a guide pin on the housing and disposed in the apertured guide member, the guide pin having an end portion embedded in the insulating housing and having a threaded aperture in said end portion, a screw clampingly engaging the cover and seated in threaded aperture, and the flexible member being attached on periphery of the end portion of the guide pin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |