Pneumatic timing attachment for an electromagnetic device

Details Pneumatic timing attachment for an electromagnetic device Pneumatic timing attachment for an electromagnetic device

1975-12-23

1977-06-14

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Retarded or delayed type

335 60, H01H 703, H01H 4300

Patent

active

040300544

ABSTRACT:
A timing attachment for a relay which may be easily programmed to provide an ON delay or an OFF delay operation of a switch having either normally open or normally closed contacts. The attachment includes a pair of identical latch levers and a pair of identical levers which operate to reset a timing mechanism and cause the timer to operate in the OFF or ON delay modes. The timing mechanism includes a pair of relatively rotatable discs having flat contacting surfaces with one of the discs having a pair of dead-ended concentric grooves and the other disc having an elongated hole which connects the concentric grooves at selected positions along their lengths to provide a metering air duct having a length that varies from zero to the full length of both grooves to provide a minimum to maximum time delay timing operation.

REFERENCES:
patent: 2656434 (1953-10-01), Jochem
patent: 3249716 (1966-05-01), Haydu et al.
patent: 3254177 (1966-05-01), Gottsacker et al.

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