Timed contact switch

Details Timed contact switch Timed contact switch

1990-12-21

1992-12-08

Pellinen, A. D.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361196, H01H 4718

Patent

active

051703130

ABSTRACT:
A timed contact switch apparatus has a conventional pushbutton placing a main switch in an actuated state when the pushbutton is depressed. A timing circuit is activated by the pushbutton to provide power to activate an electromechanical latch which holds the main switch in its actuated state while the timing circuit times out. Preferably the timing circuit operation is initiated by output of a Hall sensor which is controlled by a magnet whose position is mechanically linked to the position of the pushbutton.

REFERENCES:
patent: 3593235 (1971-07-01), Nicol
patent: 3920149 (1975-12-01), Fortino et al.
patent: 4064381 (1977-12-01), Mullen et al.
patent: 4276483 (1981-06-01), Hayden
patent: 4450987 (1984-05-01), Boettcher et al.
patent: 4467219 (1984-08-01), Reid
patent: 4714977 (1987-12-01), Hoelzer
patent: 5107237 (1992-04-01), Peterson

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