US3662475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically latched switch and circuit therefor
Assignee: Eaton Corp
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Filing: 1967-02-21
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Granted: 1972-05-16
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Expires: 1987-02-21
Abstract
Abstract The switch-selector shaft is depressed to move latch plate against core magnetized by permanent magnet. This actuates various switches depending upon rotary position of the shaft. The termination pulse from the moisture sensing control passes through a coil to set up a counter magnetic field to allow a spring to move the latch and shaft to inactive position restoring switches to their normal positions.
Inventors
- 👤 Wilbert E Beller
- 👤 Abed G Kahale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:28
CPC Classifications
H; H01; H01H; H01H36/00; G; G05; G05D; G05D22/00; G05D22/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A control mechanism comprising, an actuator movable between active and inactive positions, means biasing the actuator to its inactive position, ferrous latch means engaged with the actuator and moved to an active position by the actuator when the actuator is moved to its active position, permanent magnet keeper means for retaining the latch means in active position, a coil associated with the keeper means and wound so a pulse of given sign and magnitude will oppose and neutralize the magnetic field of the keeper means so the biasing means can return the actuator to inactive position, said keeper means including spaced ferrous keepers having a permanent magnet fixed therebetween, said coil being arranged on one of the keepers.
Claim 2
Dependent Claim
118 words
A control mechanism comprising, an actuator movable between active and inactive positions, means biasing the actuator to its inactive position, ferrous latch means engaged with the actuator and moved to an active position by the actuator when the actuator is moved to its active position, permanent magnet keeper means for retaining the latch means in active position, a coil associated with the keeper means and wound so a pulse of given sign and magnitude will oppose and neutralize the magnetic field of the keeper means so the biasing means can return the actuator to inactive position, said keeper means including spaced ferrous keepers having a permanent magnet fixed therebetween, said coil being arranged on one of the keepers.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |