G - Physics – 01 – L
Patent
G - Physics
01
L
73/70
G01L 13/02 (2006.01) G01L 9/00 (2006.01)
Patent
CA 1304957
DUAL BOURDON TUBE TYPE SENSING PRESSURE TRANSDUCER Abstract of the Disclosure A pressure transducer in the nature of a differential pressure transmitter including an instrument housing defining a chamber in which is mounted a sensing transducer one of several known types powered to provide a gauge signal that is to be supplied to instrumentation such as a controller or recorder, with the pressure sensing arrangement of the instrument being in the form of two oppositely coiled bourdon tubes mounted one on other side of the sensing transducer, with like ends of the tubes each mounting an output lever, which levers are respectively resiliently connected to the movable element of the transducer and in an oppositely acting manner, with the other ends of the respective tubes being separately connected to a mounting block arranged to provide for connection of the respective tubes to separate, externally located, sources of pressure fluids, and with one of the output levers being adjustable as to length for calibrating the instrument so that the action of the two tubes on the sensing transducer may be made equivalent when equal static pressures are sensed by the respective tubes, this compensating for inequalities in the tubes to insure a "zero" readout of the instrument when the tubes sense equal static pressures.
552366
Dwyer Instruments Inc.
Macrae & Co.
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