Patent US4141009A successfully refreshed from Google Patents.
US4141009A
Expired / Lapsed
US
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Back up alarm system
Assignee: Individual
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Filing: 1977-08-01
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Granted: 1979-02-20
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Expires: 1997-08-01
Abstract
Abstract Electrically conductive leads electrically connect a relay, a source of electrical energy and a radio transmitter for transmitting radio signals in a back up circuit with a burglar alarm. The relay is electrically connected to the electric circuit of a burglar alarm system and is maintained unenergized by said system so that the relay is normally open. When an electrical conductor of the burglar alarm circuit is energized, the relay is energized and closes the back up circuit to actuate the transmitter to transmit radio signals indicating that an electrical conductor of the burglar alarm circuit has been energized.
Inventors
- 👤 Eugene W. Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:52
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/10; B60R25/102; G; G08; G08B; G08B19/00; G08B25/00; G08B25/01; G08B25/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A back up alarm system for a burglar alarm system utilizing an electric circuit having electrical conductors for operating a burglar alarm under predetermined circumstances, said back up alarm system comprising relay means electrically connected to the electric circuit of a burglar alarm system having electrical conductors; a source of electrical energy; a radio transmitter for transmitting radio signals; and electrically conductive leads electrically connecting the relay means, the source of electrical energy and the radio transmitter in a back up circuit with the burglar alarm in a manner whereby the relay means is maintained unenergized by the burglar alarm system and maintains the relay means normally open as long as the burglar alarm system is in operative condition and when an electrical conductor of the burglar alarm circuit is energized the relay means is energized and closes the back up circuit to actuate the transmitter to transmit radio signals indicating that an electrical conductor of the burglar alarm circuit has been energized.
Claim 2
Dependent Claim
163 words
A back up alarm system for a burglar alarm system utilizing an electric circuit having electrical conductors for operating a burglar alarm under predetermined circumstances, said back up alarm system comprising relay means electrically connected to the electric circuit of a burglar alarm system having electrical conductors; a source of electrical energy; a radio transmitter for transmitting radio signals; and electrically conductive leads electrically connecting the relay means, the source of electrical energy and the radio transmitter in a back up circuit with the burglar alarm in a manner whereby the relay means is maintained unenergized by the burglar alarm system and maintains the relay means normally open as long as the burglar alarm system is in operative condition and when an electrical conductor of the burglar alarm circuit is energized the relay means is energized and closes the back up circuit to actuate the transmitter to transmit radio signals indicating that an electrical conductor of the burglar alarm circuit has been energized.
Claim 3
Dependent Claim
28 words
A back up alarm system as claimed in claim 1, further comprising a reset switch electrically connected to the relay means for manually resetting the back up circuit.
Claim 4
Dependent Claim
27 words
A back up alarm system as claimed in claim 1, further comprising a radio receiver for receiving signals transmitted by the transmitter thereby indicating an alarm condition.
References Cited (Backward Citations)
US3893069A
Cited
US4012728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |