Armature movement detection circuit

Details Armature movement detection circuit Armature movement detection circuit

1992-02-10

1993-08-31

DeBoer, Todd E.

Electrical transmission or interconnection systems

Electromagnet or highly inductive systems

361154, 361187, H01H 900

Patent

active

052412180

ABSTRACT:
A solenoid valve includes a monitoring circuit adapted to sense the current drop that occurs through the solenoid coil when the solenoid armature moves correctly, sensing of the drop being used to cause a neon to glow continuously so as to indicate correct operation of the solenoid. If the drop is not sensed, the neon is caused to blink so as to indicate incorrect operation of the solenoid. The circuit may in addition or alternatively be arranged to generate a voltage signal, upon correct operation of the solenoid, for transmission to a remotely located programmable logic controller used to control operation of the valve and like valves that form part of a pneumatically controlled machine.

REFERENCES:
patent: 3553571 (1971-01-01), Fendt et al.
patent: 4321946 (1982-03-01), Paulos et al.
patent: 4886114 (1989-12-01), Perkins et al.
patent: 4970622 (1990-11-01), Buchl

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