Invention Grant
US5412374A Method and apparatus for detecting and indicating the location of a high
temperature zone along the length of a fire detecting cable
失效
用于检测和指示沿着火灾探测电缆的长度的高温区域的位置的方法和装置
- Patent Title: Method and apparatus for detecting and indicating the location of a high temperature zone along the length of a fire detecting cable
- Patent Title (中): 用于检测和指示沿着火灾探测电缆的长度的高温区域的位置的方法和装置
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Application No.: US248374Application Date: 1994-05-24
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Publication No.: US5412374APublication Date: 1995-05-02
- Inventor: Henry H. Clinton
- Applicant: Henry H. Clinton
- Assignee: Clinton; Henry H.
- Current Assignee: Clinton; Henry H.
- Main IPC: G08B17/06
- IPC: G08B17/06 ; G08B17/00
Abstract:
A method and related apparatus for sensing and indicating the location of a "hot spot" along a temperature sensing cable utilizes a linear stable voltage feedback loop circuit for maintaining a predetermined magnitude DC voltage across one conductor of a pair of conductors having electrically insulating jacket compositions which become electrically conductive when the temperature at any location along the surface exceeds a predetermined temperature wherein the voltage measurement is a direct indication of the distance from the NEAR END of the temperature sensing cable to the "hot spot".
Public/Granted literature
- US4939518A Analog to digital converter Public/Granted day:1990-07-03
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