Key switch actuation by torsion spring

Details Key switch actuation by torsion spring Key switch actuation by torsion spring

1980-02-26

1981-11-17

Little, Willis

Electricity: circuit makers and breakers

Electric switch details

Indicators

200159R, 200340, H01H 900, H01H 1352

Patent

active

043013457

ABSTRACT:
This invention relates to a novel actuation mechanism useful, for example, in key switch operation wherein a key stem shaped to mate with apertures in a keyboard arrangement or as individual switches contains oppositely disposed, inwardly deformable, flanged members for captivating the key stem within the key apertures and further includes a torsion spring carried by the key stem and adjustably mounted for rotative movement about a pivot on the key stem. The ends of the torsion spring are movably captivated by the supporting aperture, e.g. keyboard, which in operation provides an excellent resistive tactile feel, and ease of operation on the key release stroke.

REFERENCES:
patent: 3286050 (1966-11-01), Campbell et al.
patent: 3920943 (1975-11-01), LaPointe
patent: 4029924 (1977-06-01), Frank et al.
patent: 4056700 (1977-11-01), Stannek
patent: 4112284 (1978-09-01), Leworthy

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