Piston positioning indicator

Details Piston positioning indicator Piston positioning indicator

1977-02-16

1979-02-20

Schwadron, Martin P.

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

200 82R, 200 82D, 200 83F, F01B 2526, F01B 3112

Patent

active

041400453

ABSTRACT:
In a piston actuated valve, means for determining the position of the operating piston by means of at least one insulated contact probe which is inserted through the wall of the cylinder. Two or more can be used, one in each extreme position of the piston. As the piston moves into its extreme position, contact is made with the probe and a suitable signal is sent, indicating that the piston is in that extreme position.

REFERENCES:
patent: 777677 (1904-12-01), Kettering
patent: 2552746 (1951-05-01), Steider
patent: 3003473 (1961-10-01), Ottoson
patent: 3303755 (1967-02-01), Linker
patent: 3336451 (1967-08-01), Burton
patent: 3411133 (1968-11-01), Gardner
patent: 3457384 (1969-07-01), Topfer
patent: 3466978 (1969-09-01), Carlstedt
patent: 3546667 (1970-12-01), Thomas
patent: 3610853 (1971-10-01), Reznicek
patent: 3715538 (1973-02-01), Ito
patent: 3721791 (1973-03-01), Grieves
patent: 3912893 (1975-10-01), Stoler

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