Pushbutton arrangement

Details Pushbutton arrangement Pushbutton arrangement

1977-06-28

1979-03-20

Price, William

Electricity: circuit makers and breakers

Liquid contact

Time delay

200153LA, H01H 1328

Patent

active

041455894

ABSTRACT:
A pushbutton, particularly a key of a keyboard, comprises an upper part for operation by finger touch and a lower part serving to operate an activating member, such as an electrical contact, the lower part being constructed with two surface portions of different inclination to the direction of movement of the pushbutton, said surface portions being engaged by a spring wire so as to create a sudden drop of the restoring spring force when the spring wire passes from the more inclined surface portion to the less inclined surface portion.

REFERENCES:
patent: 2951926 (1960-09-01), Frantz et al.
patent: 3193607 (1965-07-01), Anderson
patent: 3551614 (1970-12-01), Babler
patent: 3697706 (1972-10-01), Huggard
patent: 3732387 (1973-05-01), Berry
patent: 3743798 (1973-07-01), Pentecost

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