US3864650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually set magnetic relay
Assignee: Texas Instruments Inc
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Filing: 1973-12-05
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Granted: 1975-02-04
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Expires: 1993-12-05
Abstract
Abstract A manually set magnetic relay is utilized to override an electrical interlock in a one-time operation. Once the relay has been utilized, it automatically disables itself and must be manually set again for another operation. The relay includes an electromagnetic coil which closes a set of load contacts that are connected in parallel with the electrical interlock. A secondary circuit for energizing the coil includes a pair of flexible conductors forming a switch which is latched open when the coil is de-energized. To close the switch and energize the coil, a manually actuated plunger engages one of the conductors and moves it from the latched position into contact with the other conductor of the switch. The plunger, during actuation, also holds the load contacts open to provide trip-free operation. A one-piece push button having flexible sidewalls is conveniently used to actuate the plunger.
Inventors
- 👤 Thomas E Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:06
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/32; H01H50/326; B; B60; B60R; B60R22/00; B60R22/48; B60R2022/4883
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
186 words
A manually set magnetic relay for one-time operations comprising: first switch means operatively connectible in a load circuit; electromotive force generating means including an electromagnetic coil operatively connected to the first switch means for completing the load circuit upon energization of the coil; second switch means serially coupled to the coil to permit energization and de-energization of the coil, the second switch means including first and second movable conductors positioned with portions of the conductors in overlying relationship for movement in and out of electrical contact to close or open the circuit through the second switching means and the coil; latch means operatively engageable with the first conductor of the second switch means for holding the first conductor in a latched position out of contact with the second conductor of the second switch means; the electromotive force generating means also being operatively coupled to the second conductor of the second switch means for moving the first conductor into the latched position; and manually operable actuator means engagable with the first conductor of the second switch means for moving the first conductor out of the latched position.
Claim 2
Dependent Claim
186 words
A manually set magnetic relay for one-time operations comprising: first switch means operatively connectible in a load circuit; electromotive force generating means including an electromagnetic coil operatively connected to the first switch means for completing the load circuit upon energization of the coil; second switch means serially coupled to the coil to permit energization and de-energization of the coil, the second switch means including first and second movable conductors positioned with portions of the conductors in overlying relationship for movement in and out of electrical contact to close or open the circuit through the second switching means and the coil; latch means operatively engageable with the first conductor of the second switch means for holding the first conductor in a latched position out of contact with the second conductor of the second switch means; the electromotive force generating means also being operatively coupled to the second conductor of the second switch means for moving the first conductor into the latched position; and manually operable actuator means engagable with the first conductor of the second switch means for moving the first conductor out of the latched position.
Claim 3
Dependent Claim
47 words
A manually set magnetic relay as defined in claim 1 wherein: the first and second conductors of the second switch means are flexible conductors resiliently biased into contact in the unlatched position of the first conductor and positioned in angularly disposed and overlying relationship when in contact.
Claim 4
Dependent Claim
88 words
A manually set magnetic relay as defined in claim 2 wherein: the electromotive force generating means is mechanically coupled by the second conductor of the second switch means to the first conductor of the second switch means for latching whereby energization of the force generating means moves the first conductor in contact with the second conductor toward the latched condition by means of the second conductor and de-energization of the force generating means leaves the first conductor in the latched position out of contact with the second conductor.
Claim 5
Dependent Claim
77 words
A manually set magnetic relay as defined in claim 3 wherein: the first switch means includes a clapper arm operatively connected with the coil of the force generating means for closing the first switch means and a switch contact mounted on the clapper arm; and the second conductor of the second switch means is opeRatively engaged with the clapper arm for movement of the first conductor with the clapper arm in response to the force generating means.
Claim 6
Dependent Claim
69 words
A manually set magnetic relay as defined in claim 1 wherein: the latch means includes a support member on which the first conductor of the second switch means rests in the latched position out of contact with the second conductor; and the manually operable actuator means comprises a manually displaceable member engagable with the first conductor in the latched position to force the first conductor from the support member.
Claim 7
Dependent Claim
42 words
A manually set relay as defined in claim 5 wherein: the manually displaceable member of the actuator means is a plunger having a camming surface engaging the first conductor of the second switch means to move the conductor from the latched position.
Claim 8
Dependent Claim
40 words
The manually set magnetic relay of claim 6 wherein the manually operable actuator means further includes a return spring connected with the plunger for moving the camming surface of the plunger away from the second conductor in the latched position.
Claim 9
Dependent Claim
46 words
A manually set relay as defined in claim 1 wherein: the manually operable actuator means is also engagable with the first switch means for positively holding the first switch means open before moving the first conductor of the second switch means out of the latched position.
Claim 10
Dependent Claim
57 words
The manually set magnetic relay of claim 1 further including: a cover enclosing the first and second switch means, the electromotive force generating means and the latch means; and wherein: the manually operable actuator includes a push button projecting through the cover and comprised of a resilient one-piece hat-shaped member mounted in sealing relationship to the cover.
References Cited (Backward Citations)
US2361564A
Cited
US3449714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |