The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 1997
Filed:
Sep. 08, 1995
Wayne R Hay, Pleasant Hill, CA (US);
Whittaker Corporation, Concord, CA (US);
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.