US3623153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
On-circuit buzzer device with bucking for automobiles coil cancel
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1969-04-29
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Granted: 1971-11-23
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Expires: 1989-04-29
Abstract
Abstract This is an on-circuit buzzer device for automotive use which utilizes a pair of coils in electrical bucking arrangement to operate a buzzer when certain conditions are met. The device uses the bucking arrangement as a cancelling means.
Inventors
- 👤 Rodney Hayden
- 👤 Mario Guarasci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:27
CPC Classifications
B; B60; B60Q; B60Q9/00; B60Q9/001; B60Q11/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
An electric buzzer relay-type device for automotive use comprising a buzzer electric relay having a core, a normally open pair of contacts, a first winding and a second winding on said core, the first winding connected to an input and to a switch connected to ground, and the second winding connected to a terminal and to the switch and to the first winding, one of the contacts connected to one end of the first winding and the other connected to the other end of the first winding whereby a plus voltage on the input with the switch closed and the terminal having no voltage thereon will cause the buzzer to operate.
Claim 2
Dependent Claim
111 words
An electric buzzer relay-type device for automotive use comprising a buzzer electric relay having a core, a normally open pair of contacts, a first winding and a second winding on said core, the first winding connected to an input and to a switch connected to ground, and the second winding connected to a terminal and to the switch and to the first winding, one of the contacts connected to one end of the first winding and the other connected to the other end of the first winding whereby a plus voltage on the input with the switch closed and the terminal having no voltage thereon will cause the buzzer to operate.
Claim 3
Dependent Claim
41 words
The device of claim 1, in which said terminal is connected to an automotive ignition circuit and the ohmic resistance of the device is greater than 100 ohms whereby the ignition circuit in the off condition serves as effective chassis ground.
References Cited (Backward Citations)
US2507398A
Cited
US3172080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |