Electrical resistors – Strain gauge type – Fluid- or gas pressure-actuated
Patent
1979-12-05
1981-10-13
Albritton, C. L.
Electrical resistors
Strain gauge type
Fluid- or gas pressure-actuated
29610SG, 338 42, G01L 122
Patent
active
042951160
ABSTRACT:
Sensing and electrical-signal characterization of fluid pressures is effected by a miniature precision transducer manufacturable at low cost from a combination of a pair of sub-assemblies, one of which consists of a single-piece metal transducer element having a flanged body with a blind-hole port leading from a mechanical pressure fitting to the inner side of a transverse thin diaphragm which forms the blunt flat end of the body except for a bonded covering of both the machined outer side of the diaphragm and its coplanar annular rigid rim by a foil-type rosette strain gage bridge array and its layer of supporting insulation. Both the contact tabs and certain abradable resistance components of the flat foil bridge array are distributed about and disposed in overlying adjacent relation to the rigid annular rim of the body, where there is accessibility for convenient testing and adjustment and electrical contacting before a second sub-assembly, which serves as a seal and electrical connector, is fitted over the closed end of the body in a protective and electrically-coupled relation to the gaged diaphragm.
REFERENCES:
patent: 3008109 (1961-11-01), Starr
patent: 3247719 (1966-04-01), Chelner
patent: 3289134 (1966-11-01), Laimins et al.
patent: 3303450 (1967-02-01), Brackett, Jr. et al.
patent: 3453873 (1969-07-01), Lambert
patent: 3486223 (1969-12-01), Butera
patent: 3527099 (1970-09-01), Herceg
patent: 4116075 (1978-09-01), Ort
Albritton C. L.
Bofors America, Inc.
Mrose James E.
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