Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-09-08
1997-11-25
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340592, 200 814, 7320413, G08B 2100
Patent
active
056917023
ABSTRACT:
Electrical circuitry associated with a pneumatic pressure detector for use in an overheat condition or fire alarm system for aircraft. The pressure detector comprises a plenum situated between a pair of deformable diaphragms and pressurized by a capillary type sensor containing an absorbed gas. A control electronics stage is located remotely from the pressure detector stage and is connected thereto by a single wire extending between them. The control electronics stage senses integrity failure of the pressure detector, an overheat or fire condition, and a ground fault in the connection between the two stages and provides corresponding output indications. The circuitry also includes ground connections at the control electronics stage and the pressure detector, respectively.
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patent: 3896423 (1975-07-01), Lindberg
patent: 4591677 (1986-05-01), Hirota et al.
patent: 5136278 (1992-08-01), Watson et al.
Bissell Henry M.
Hofsass Jeffery
Tweel , Jr. John
Whittaker Corporation
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