Switching apparatus

Details Switching apparatus Switching apparatus

1989-05-26

1990-01-30

Deboer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

361 94, 361179, 200 18, 200 47, 307116, 307119, 307113, 324422, 324423, 340644, H01H 3500, H01H 316

Patent

active

048977543

ABSTRACT:
There are provided a first switch which is switched to the on state or the off state in association with a displacement of an actuator which causes a displacement by a contact with an object and a second switch which is switched to the on state or off state later than the first switch in association with the displacement of the actuator. A switch output is produced and an abnormality is detected in accordance with the on and off states of these switches.

REFERENCES:
patent: 3059071 (1962-10-01), Dobes
patent: 4247744 (1981-01-01), Birkle
patent: 4670812 (1987-06-01), Doerfler et al.

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