EP0143976A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fire detector equipped with sensor
Assignee: Nohmi Bosai Ltd
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Filing: 1984-10-25
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Granted: —
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Expires: 2004-10-25
Abstract
Abstract A fire detector which is equipped with a sensor detecting physical quantity of heat, light or smoke and which, in particular, indicates output levels of the sensor at the time when the detector has operated and at predetermined intervals until the detector has operated together with the time of its operation and the predetermined time whenever necessity arises later.
Inventors
- 👤 Ltd. Okayama Yoshiaki C/O Nohmi Bosai Kogyo Co.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 03:13
CPC Classifications
G; G08; G08B; G08B17/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A fire detector which is equipped with a sensor detecting physical quantity of heat, light or smoke, which continously monitors changes in output level of the sensor and operates when a predetermined basic level is exceeded, and which is further equipped with a means to store the output level of the sensor together with the time when the fire detector has operated, a means to store output levels in order of time set at proper intervals until the fire detector operates, and a means to indicate, at any time, the stored output levels and time.
Claim 2
Dependent Claim
95 words
A fire detector which is equipped with a sensor detecting physical quantity of heat, light or smoke, which continously monitors changes in output level of the sensor and operates when a predetermined basic level is exceeded, and which is further equipped with a means to store the output level of the sensor together with the time when the fire detector has operated, a means to store output levels in order of time set at proper intervals until the fire detector operates, and a means to indicate, at any time, the stored output levels and time.
Claim 3
Dependent Claim
60 words
A fire detector equipped with a sensor as set forth in Claim 1 wherein the means to store the output level of the sensor together with the time when the fire detector has operated is to store the maximum value of the above-mentioned output level whilst in the alarming condition together with the initial response time of the fire detector.
Claim 4
Dependent Claim
60 words
A fire detector equipped with a sensor as set forth in Claim 1 or 2, wherein the means to store the output levels in order of time set at proper intervals until the fire detector operates is to cancel the stored output levels and time in order as from the oldest ones whenever new output levels and time are stored.
References Cited (Backward Citations)
US3623087A
Cited
US4032908A
Cited
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