Device for monitoring control elements

Details Device for monitoring control elements Device for monitoring control elements

1974-03-04

1976-02-10

Cohan, Alan

Fluid handling

Systems

Valves with separate, correlated, actuators

91459, 13759616, F15B 2000

Patent

active

039372545

ABSTRACT:
A device for monitoring the relative position of synchronously moved valve cases in safety valves controlling pneumatic or hydraulic drives. Fixedly attached to each valve case and symmetrically disposed one to the other is a member of a metallic material, arranged proximate to the free ends of a pivotally mounted magnetic bar. The axis of rotation of the magnetic bar, which is aligned with the synchronous position of the valve cases in its basic position, is parallel to the direction of movement of the valve cases, and a swing of the magnetic bar, which only occurs in the event of a defect, i.e. if the valve cases do not operate in synchronism, provides a signal for making the monitored drive inoperative.

REFERENCES:
patent: 2289574 (1942-07-01), Carlson
patent: 2912218 (1959-11-01), Stillwagon
patent: 3139109 (1964-06-01), Ruchser
patent: 3194269 (1965-07-01), Williams
patent: 3670767 (1972-06-01), Mahorney

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