US4737769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire detection alarm system
Assignee: LIGHT CIRCUIT BREAKER Inc
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Filing: 1986-01-03
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Granted: 1988-04-12
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Expires: 2006-01-03
Abstract
Abstract An alarm system utilizing existing electrical wiring in conjunction with an alarm box. An alarm signal is manually or automatically generated and is converted to an RF signal which is conducted over the existing electrical wiring to an alarm box. The RF signal is re-converted to an electronic or electrical signal and the alarm signal is visually displayed. Various sensors for sensing the presence of various conditions, such as fire or unauthorized intrusion are removeably or directly affixed to plug receptacles or wall switches. Additionally, the system is connected to circuit protection devices, such as circuit breakers which could be tripped, should a fire conduction be sensed.
Inventors
- 👤 Oscar V. Masot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:43
CPC Classifications
G; G08; G08B; G08B25/00; G08B25/01; G08B25/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
249 words
An alarm system utilizing the existing electrical wiring provided in the structure and wall mounted electrical receptacles and wall-mounted switchplates connected to said wiring, each of said wall-mounted electrical receptacles and switchplates provided in a protective area, comprising: at least one alarm signal generating means connected to said receptacles or switchplates for producing an alarm signal; a plurality of first conversion means connected between said alarm signal generating means and said electrical wiring for converting the signal produced by said alarm signal generating means to an encoded RF signal and conducting said signal over said existing electrical wiring, each of said first conversion means provided with an encoder for producing an encoded signal different than the signal produced by at least one other first conversion means; second conversion means connected to each of said first conversion means by said electrical wiring for converting the respective encoded RF signal produced by each of said first conversion means and transmitted over the existing wiring to said second conversion means to an electrical or electronic signal; a panel box provided with a plurality of circuit protective devices therein, said panel box connected to said electrical wiring downstream from each of said first conversion means; and a central monitor provided at a location remote from said panel box for displaying the location of each of said alarm signal generating means, said central monitor visually displaying the location of each of said produced alarm signal based upon the signals generated by said conversion means.
Claim 2
Dependent Claim
249 words
An alarm system utilizing the existing electrical wiring provided in the structure and wall mounted electrical receptacles and wall-mounted switchplates connected to said wiring, each of said wall-mounted electrical receptacles and switchplates provided in a protective area, comprising: at least one alarm signal generating means connected to said receptacles or switchplates for producing an alarm signal; a plurality of first conversion means connected between said alarm signal generating means and said electrical wiring for converting the signal produced by said alarm signal generating means to an encoded RF signal and conducting said signal over said existing electrical wiring, each of said first conversion means provided with an encoder for producing an encoded signal different than the signal produced by at least one other first conversion means; second conversion means connected to each of said first conversion means by said electrical wiring for converting the respective encoded RF signal produced by each of said first conversion means and transmitted over the existing wiring to said second conversion means to an electrical or electronic signal; a panel box provided with a plurality of circuit protective devices therein, said panel box connected to said electrical wiring downstream from each of said first conversion means; and a central monitor provided at a location remote from said panel box for displaying the location of each of said alarm signal generating means, said central monitor visually displaying the location of each of said produced alarm signal based upon the signals generated by said conversion means.
Claim 3
Dependent Claim
26 words
The alarm system in accordance with claim 1 wherein said panel box is provided between said plurality of first conversion means and said second conversion means.
Claim 4
Dependent Claim
23 words
The alarm system in accordance with claim 1 wherein said panel box is provided between said second conversion means and said central monitor.
Claim 5
Dependent Claim
75 words
The alarm system in accordance with claim 1 wherein said wall-mounted electrical receptacles and switchplates and further provided with at least one sensing means directly affixed thereto for sensing the presence of a fire condition in the environment in proximity to said receptacles and switchplates, said sensor providing a signal which is connected to one of said first conversion means which would ultimately trip said circuit protective device associated with said respective receptacle and switchplate.
Claim 6
Dependent Claim
17 words
The alarm system in accordance with claim 1 wherein said alarm signal generating means is manually activated.
Claim 7
Dependent Claim
17 words
The alarm system in accordance with claim 1 wherein said alarm signal generating means is automatically activated.
Claim 8
Dependent Claim
20 words
The alarm system in accordance with claim 1 wherein said alarm signal generating means is directly affixed to said receptacles.
Claim 9
Dependent Claim
20 words
The alarm system in accordance with claim 1 wherein said alarm signal generating means is removably connected to said receptacles.
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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) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |