Pressure responsive control device and method of making the same

Details Pressure responsive control device and method of making the same Pressure responsive control device and method of making the same

1980-02-19

1981-11-17

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

336 30, G01L 910

Patent

active

043003966

ABSTRACT:
A pressure responsive control device having a housing carrying a flexible diaphragm therein that cooperates with the housing to define a pressure chamber therein that is adapted to receive a variable pressure that acts against the diaphragm to position the diaphragm relative to the housing in relation to the value of the pressure, the diaphragm being operatively interconnected to a plunger that follows movement of the diaphragm. The control device has a transducer operatively associated with the plunger to produce an electrical signal in relation to the position of the plunger, the transducer comprising a core carried by the plunger in axially aligned relation therewith and an induction coil carried by the control device and receiving the core therein. A range spring is carried by the housing and is operatively interconnected to the diaphragm to tend to oppose movement of the diaphragm in one direction of movement thereof. The range spring has one end bearing against a calibrating member and the other end bearing against an annular shoulder of the plunger. The induction coil is carried on a spool-like member that has an externally threaded portion, the calibrating member being threaded to the threaded portion to provide for calibrating movement thereof.

REFERENCES:
patent: 2740941 (1956-04-01), Kelly
patent: 2903678 (1959-09-01), Wills
patent: 3730146 (1973-05-01), Moulds et al.
patent: 4024483 (1977-05-01), Tomczak et al.
patent: 4024484 (1977-05-01), Tomczak et al.
patent: 4042899 (1977-08-01), Tomczak et al.
patent: 4161886 (1979-07-01), Eshelman et al.
patent: 4201240 (1980-05-01), Case

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