Measuring and testing – Fluid pressure gauge – Bourdon
Patent
1979-05-03
1980-12-09
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Bourdon
G01L 704
Patent
active
042377382
ABSTRACT:
A pressure measuring sub-assembly for a pressure gauge is comprised of a Bourdon tube providing total support for the gauge amplifier operably connected to drive an output pointer shaft. Th sub-assembly can be installed as a unit in a gauge housing providing a self-supporting inlet connection for the Bourdon tube.
In a preferred embodiment, the amplifier is supported on the displacement portion of the Bourdon tube and in the process of manufacture a swageable clamp is loosely placed near the fixed end of the Bourdon tube to loosely receive the secureable end of an elongated wire actuator. The opposite actuator end extends into the motion path of the amplifier to define a pivot axis therefor. When calibrating the unit for linearity, the Bourdon tube is first pressurized to one-half of rated operating capacity, and while maintaining calibration pressure the clamp is subjected to a bi-directional swaging force which selectively crimps the clamp to secure it to the Bourdon tube and the actuator to the clamp.
REFERENCES:
patent: 1835561 (1931-12-01), Eshbaugh
patent: 2244334 (1941-06-01), Hopkins
patent: 2447739 (1948-08-01), Courtney
patent: 3398583 (1968-08-01), Heise et al.
patent: 4055085 (1977-10-01), Wetterhorn
Dresser Industries Inc.
Rubin Daniel
Woodiel Donald O.
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