EP0078443A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fire detection system
Assignee: Armtec Industries Inc
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Filing: 1982-10-19
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Granted: —
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Expires: 2002-10-19
Abstract
Abstract An optical fire detector has a radiant energy detector mounted within a housing including a window through which radiant energy is received by the detector. An optical fiber bundle arranged in the wall of the housing has an end emitting light to the detector through the window, and another end receiving light from a test lamp also within the housing but shielded from the detector by an optical shield.
Inventors
- 👤 Roger A. Wendt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/12; G08B29/14; G08B29/145; G08B17/00; G08B17/10; G08B17/11; G08B17/113
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
An optical fire detection system comprising a housing, a portion of said housing including means allowing passage of radiant energy from the exterior to the interior of said housing, a radiant energy detector located within said housing and adapted to detect radiant energy through said passage means and to energize an alarm when said radiant energy exceeds a pre- determined level, wherein the improvement comprises a radiant energy emitting test means located in said housing, an optical light transmission means for transmitting radiant energy from said test means to the exterior of said passage means, said transmission means having a light receiving end facing said test means and a light emitting end located outside said passage means for emitting light to said radiant energy detector through said passage means.
Claim 2
Dependent Claim
129 words
An optical fire detection system comprising a housing, a portion of said housing including means allowing passage of radiant energy from the exterior to the interior of said housing, a radiant energy detector located within said housing and adapted to detect radiant energy through said passage means and to energize an alarm when said radiant energy exceeds a pre- determined level, wherein the improvement comprises a radiant energy emitting test means located in said housing, an optical light transmission means for transmitting radiant energy from said test means to the exterior of said passage means, said transmission means having a light receiving end facing said test means and a light emitting end located outside said passage means for emitting light to said radiant energy detector through said passage means.
Claim 3
Dependent Claim
20 words
The optical fire detector system of claim 1 in which said optical light transmission means comprises an optical fiber bundle.
Claim 4
Dependent Claim
39 words
The optical fire detector system of claim 1 further including an optical shield means arranged to shield said radiant energy detector from radiant energy being transmitted directly within said housing from said test means to said radiant energy detector.
Claim 5
Dependent Claim
30 words
The optical fire detection system of claim 1, 2, or 3 wherein said housing includes a wall extending past said passage means, said wall containing said optical light transmission means.
Claim 6
Dependent Claim
176 words
An optical fire detection system comprising a housing, a first portion of said housing including means for allowing passage of radiant energy from the exterior to the interior of said housing, and a second portion of said housing extending exteriorly of said passage means, a radiant energy detector located with said housing and adapted to detect radiant energy through said passage means and to energize a first alarm when said radiant energy exceeds a pre- determined level, a radiant energy emitting test means located in said housing, an optical fiber light transmission means for transmitting radiant energy from said test means, from the interior of said housing to the exterior of said passage means, said transmission means having a light receiving end facing said test means and a light emitting end located in said second housing portion for emitting light to said radiant energy detector through said passage means, and an optical shield means arranged to shield said radiant energy detector from radiant energy transmitted directly within said housing from said test means to said detector.
Claim 7
Dependent Claim
176 words
An optical fire detection system comprising a housing, a first portion of said housing including means for allowing passage of radiant energy from the exterior to the interior of said housing, and a second portion of said housing extending exteriorly of said passage means, a radiant energy detector located with said housing and adapted to detect radiant energy through said passage means and to energize a first alarm when said radiant energy exceeds a pre- determined level, a radiant energy emitting test means located in said housing, an optical fiber light transmission means for transmitting radiant energy from said test means, from the interior of said housing to the exterior of said passage means, said transmission means having a light receiving end facing said test means and a light emitting end located in said second housing portion for emitting light to said radiant energy detector through said passage means, and an optical shield means arranged to shield said radiant energy detector from radiant energy transmitted directly within said housing from said test means to said detector.
References Cited (Backward Citations)
No citation records indexed.
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