Timed electric switch

Details Timed electric switch Timed electric switch

1980-10-27

1983-01-25

Rubinson, G. Z.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307590, 335186, H01H 4324

Patent

active

043705650

ABSTRACT:
A timed switch for controlling an electric load has a relay mounted within the switch housing. The relay has a pair of contacts which are connected to the load, a movable core connected to one of the contacts and a holding coil which holds the core in and holds the contacts closed when energized and releases them when deenergized. The switch also has a timer; and a manual actuator for moving the core and closing the contacts, actuating the timer and actuating the relay coil. The timer is connected to the relay coil to deenergize the coil and release the contacts upon expiration of a predetermined interval measured by the timer. The contacts may also be opened by actuation of the manual actuator without having to overcome the holding force of the relay coil on the core.

REFERENCES:
patent: 2898433 (1959-08-01), Felt
patent: 3303396 (1967-02-01), Culbertson
patent: 3393604 (1968-07-01), Lundin
patent: 3842375 (1974-10-01), Collette
patent: 3858027 (1974-12-01), Phillips
patent: 3898423 (1975-08-01), Taylor et al.
patent: 3939361 (1976-02-01), Aidala et al.
patent: 3944893 (1976-03-01), Hayden
patent: 3973140 (1976-08-01), Phillips
patent: 4047375 (1977-09-01), Wolff
patent: 4095213 (1978-06-01), Hayden
patent: 4101001 (1978-07-01), Smith

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