Electronic slide valve position indicator

Details Electronic slide valve position indicator Electronic slide valve position indicator

1992-05-19

1993-11-02

Bertsch, Richard A.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

418 2, 32420717, F01C 116, F01C 124

Patent

active

052579212

ABSTRACT:
A closed stainless steel tube is used to provide pressure and media isolation between the core and coils of a sensor in the form of a variable core transformer. The core is connected to and moved with a slide valve of a screw compressor and its actuating piston. The current output from the secondary coil is converted into a voltage, linearized and communicated to a microprocessor for controlling the position of the slide valve and thereby the loading of the compressor.

REFERENCES:
patent: 2459210 (1949-01-01), Ashcraft
patent: 4610613 (1986-09-01), Szymaszek
patent: 4783626 (1988-11-01), Shimizu
patent: 4857919 (1989-08-01), Braswell

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