US4012728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back up alarm system
Assignee: Lee Raymond Organization Inc
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Filing: 1975-03-31
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Granted: 1977-03-15
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Expires: 1995-03-31
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. The relay is electrically connected to the electric circuit of a burglar alarm system. When an electrical conductor of the burglar alarm system is cut, the relay 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 cut.
Inventors
- 👤 Eugene W. Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:42
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
179 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 raido transmitter in a back up circuit with the burglar alarm circuit in a manner whereby the relay means is energized by the electric circuit of 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 cut the relay means is deenergized 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 cut, said burglar alarm circuit and said back up circuit constituting different circuits.
Claim 2
Dependent Claim
179 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 raido transmitter in a back up circuit with the burglar alarm circuit in a manner whereby the relay means is energized by the electric circuit of 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 cut the relay means is deenergized 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 cut, said burglar alarm circuit and said back up circuit constituting different circuits.
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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |