US4816808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire alarm system
Assignee: Nohmi Bosai Ltd
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Filing: 1987-03-27
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Granted: 1989-03-28
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Expires: 2007-03-27
Abstract
Abstract In a fire alarm system wherein a receiver polls terminal devices having CPU's, such as fire detectors, fire sensors and repeaters, and the receiver reads monitoring information called from the terminal device or transmits control information thereto; a fire alarm system constructed so that each of said terminal devices having a CPU brings said CPU included therein into a standby status when a polling address of said receiver and an intrinsic address of said terminal device are different.
Inventors
- 👤 Toshikazu Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:15
CPC Classifications
G; G08; G08B; G08B26/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
A fire alarm system wherein a receiver polls terminal devices each have a CPU, said terminal devices including at least one of fire directors, fire sensors and repeaters, and wherein said receiver reads monitoring information called from said terminal devices or transmits control information thereto; wherein each of said respective terminal devices include: a transmission signal-receiving means for receiving signals from said receiver; a determining means for determining whether or not a polling address received by said transmission signal-receiving means coincides with a self-address of the terminal device; and a waiting state set means for setting the CPU in the terminal device to a waiting state when a non-coincidence between said polling address and said self address is determined by said determining means.
Claim 2
Dependent Claim
123 words
A fire alarm system wherein a receiver polls terminal devices each have a CPU, said terminal devices including at least one of fire directors, fire sensors and repeaters, and wherein said receiver reads monitoring information called from said terminal devices or transmits control information thereto; wherein each of said respective terminal devices include: a transmission signal-receiving means for receiving signals from said receiver; a determining means for determining whether or not a polling address received by said transmission signal-receiving means coincides with a self-address of the terminal device; and a waiting state set means for setting the CPU in the terminal device to a waiting state when a non-coincidence between said polling address and said self address is determined by said determining means.
Claim 3
Dependent Claim
60 words
A fire alarm system as defined in claim 1, wherein each of said transmission signal-receiving means includes an interruption signal output means for outputting a received interruption signal when an address signal is received, said CPU of its corresponding terminal device being set to an operating state by said received interruption output signal output from said interruption signal output means.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |