Patent US3815110A successfully refreshed from Google Patents.
US3815110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warning alarm for providing an alarm upon operating means being unintentionally connected to a power source
Assignee: Individual
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Filing: 1972-03-23
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Granted: 1974-06-04
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Expires: 1992-03-23
Abstract
Abstract A warning alarm for providing an alarm upon first switch means being operated including an alarm device includes, a first solid state device electrically associated with a first switch and an alarm device for completing an energization path for the alarm device upon being operated. The first solid state device has a gate for receiving current for operating the first solid state device upon operation of the first switch. A second solid state device is electrically associated with the first switch, a second switch and the first solid state device. The second solid state device has a gate for receiving current for operating the second solid state device upon operation of the second switch. The second solid state device, when operated, shunts the gate of the first solid state device to preclude operation of the first solid state device and thereby interrupts the energization path for the alarm device.
Inventors
- 👤 S Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:20
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/80; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; H02J2105/00; H02J2105/30; H02J2105/33
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A warning alarm for providing an alarm upon first switch means being operated, comprising: a. an alarm device for providing said alarm upon being operated; b. a first solid state device electrically associated with said first switch means and said alarm device and for completing an energization path for said alarm device upon being operated, said solid state device having a gate for receiving current for operating said first solid state device upon said first switch means being operated; c. second switch means; and d. a second solid state device electrically associated with said first switch means, said second switch means and said first solid state device, said second solid state device having a gate for receiving current for operating said second solid state device upon said second switch means being operated, said second solid state device upon being operated shunting said gate of said first solid state device to preclude operation of said first solid state device thereby interrupting said energization path for said alarm device.
Claim 2
Dependent Claim
167 words
A warning alarm for providing an alarm upon first switch means being operated, comprising: a. an alarm device for providing said alarm upon being operated; b. a first solid state device electrically associated with said first switch means and said alarm device and for completing an energization path for said alarm device upon being operated, said solid state device having a gate for receiving current for operating said first solid state device upon said first switch means being operated; c. second switch means; and d. a second solid state device electrically associated with said first switch means, said second switch means and said first solid state device, said second solid state device having a gate for receiving current for operating said second solid state device upon said second switch means being operated, said second solid state device upon being operated shunting said gate of said first solid state device to preclude operation of said first solid state device thereby interrupting said energization path for said alarm device.
Claim 3
Dependent Claim
66 words
A warning alarm according to claim 1 further including a diode connected between said second solid state device and said gate of said first solid state device and for providing a voltage drop thereacross substantially equal to the voltage drop across said second solid state device when operated thereby precluding operation of said first solid state device upon the operation of said second solid state device.
Claim 4
Dependent Claim
16 words
A warning alarm according to claim 1 wherein said first solid state device is a Triac.
Claim 5
Dependent Claim
17 words
A warning alarm according to claim 1 wherein said first and second solid state devices are SCR''s.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |