Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1974-09-25
1976-03-16
Wood, Jr., M. H.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
73393, 200 83B, 200 83N, 280150AB, 340242, H01H 3534
Patent
active
039447693
ABSTRACT:
A pressure sensing means having a housing provided with a chamber therein. A double wall fluid operated device is disposed in the chamber of the housing and is carried by the same, the walls of the device defining a chamber therebetween that is interconnected to the exterior of the housing by a passage. A charge of pressure fluid is sealed in the chamber of the housing to initially hold the walls of the device in flat abutting relation in a manner to prevent an adverse permanent set thereof. Subsequently, the chamber of the double wall fluid operated device is interconnected to the pressurized chamber of a container means for a vehicular air bag safety system whereby the pressure sensing means can subsequently detect loss or gain of pressure differential across at least one of the walls of the double wall operated device for detection purposes or the like.
REFERENCES:
patent: 1665381 (1928-04-01), Siddal
patent: 2439561 (1948-04-01), Cressey
patent: 2839630 (1958-06-01), Wood
patent: 3246093 (1966-04-01), Boettinger
patent: 3302269 (1967-02-01), Cooper
patent: 3359388 (1967-12-01), Houser
patent: 3723684 (1973-03-01), Greenwood
patent: 3728899 (1973-04-01), Dijkema
patent: 3735376 (1973-05-01), Kermer
patent: 3818764 (1974-06-01), Wagner
Robertshaw Controls Company
Silverstrim John P.
Wood, Jr. M. H.
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