US3710288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical interlock for electrical contactors
Assignee: Westinghouse Electric Corp
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Filing: 1971-11-08
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Granted: 1973-01-09
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Expires: 1991-11-08
Abstract
Abstract Mechanical interlock assembly for two or more electrical contactors in which the contactors each comprise a movable contact structure associated with electromagnetic means for actuating the movable contact structure for closing a circuit through the contactor; and a lever pivotally mounted between the contactors and having opposite end portions disposed in the path of movement of corresponding movable contact structures for holding one structure in a ''''closed-circuit'''' position and the other structure in an ''''open-circuit'''' position.
Inventors
- 👤 K Grunert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:30
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/32; H01H50/323
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
236 words
An electric control system comprising at least two control devices and a mechanical interlock, each control device comprising a stationary contact structure, an electromagnet including a magnetic armature, magnetic core and a coil, a movable structure movable as a unit and comprising a movable contact structure, a movable contact carrier, and said magnetic armature, the magnetic armature being movable relative to the core to move the movable contact structure between an operated position and an unoperated position to control an electric circuit, the mechanical interlock being between the control devices and including a lever reciprocally movable between first and second positions and having one end portion cooperable with the movable structure of one control device for holding the movable contact structure of the other control device in its unoperated position in said first position of said movable member and having another end portion cooperable with the movable structure of the other control device for holding said movable contact structure of said one control device in unoperated position in said second position of said movable member, means for mounting the lever between the control devices and comprising an adjusting bracket and a pivot pin, the lever being mounted on the pivot pin, the pivot pin being mounted on the adjusting bracket, and the pivot pin being Movable to varying positions in a line of travel substantially parallel to the lines of travel of the movable contact carriers.
Claim 2
Dependent Claim
236 words
An electric control system comprising at least two control devices and a mechanical interlock, each control device comprising a stationary contact structure, an electromagnet including a magnetic armature, magnetic core and a coil, a movable structure movable as a unit and comprising a movable contact structure, a movable contact carrier, and said magnetic armature, the magnetic armature being movable relative to the core to move the movable contact structure between an operated position and an unoperated position to control an electric circuit, the mechanical interlock being between the control devices and including a lever reciprocally movable between first and second positions and having one end portion cooperable with the movable structure of one control device for holding the movable contact structure of the other control device in its unoperated position in said first position of said movable member and having another end portion cooperable with the movable structure of the other control device for holding said movable contact structure of said one control device in unoperated position in said second position of said movable member, means for mounting the lever between the control devices and comprising an adjusting bracket and a pivot pin, the lever being mounted on the pivot pin, the pivot pin being mounted on the adjusting bracket, and the pivot pin being Movable to varying positions in a line of travel substantially parallel to the lines of travel of the movable contact carriers.
Claim 3
Dependent Claim
23 words
The electric control system of claim 1 in which there are means for biasing each control device movable structure in the unoperated position.
Claim 4
Dependent Claim
58 words
The electric control system of claim 1 in which there are three control devices and two of which devices are grouped as a pair with an interlock therebetween and with a third device being spaced from the pair of devices with a second interlock disposed between the third device and at least one of the pair of devices.
Claim 5
Dependent Claim
27 words
The electric control system of claim 1 in which each end portion of the movable member is adapted to engage the contact carrier at two spaced locations.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |