Keyboards incorporating keys pivotable against biased detent mea

Details Keyboards incorporating keys pivotable against biased detent mea Keyboards incorporating keys pivotable against biased detent mea

1983-03-21

1984-09-18

Marcus, Stephen

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200339, 200323, 200291, 200308, 200315, H01H 920, H01H 2302

Patent

active

044726104

ABSTRACT:
A keyboard, particularly for control of electronics in vehicles, has at least one key mounted in a recess in the keyboard and pivotable about a pivot to press against a shaped portion of a rubber gasket to operate an electrical switch. A display, preferably a multiple character LCD, for labellingthe switch is visible through a transparent member and connected to a p.c.b. by zebra striped members. The display is not obscured by a finger operating the key. The key has a transverse bore in which a compression spring is mounted with balls at the end of the spring to co-operate with stepped generally cylindrical members mounted with their axes perpendicular to the pivot pin and forming detent means to give the key a tactile operation. Preferably the key operates three switches by way of three shaped portions.

REFERENCES:
patent: 2817721 (1957-12-01), Edwards
patent: 3155806 (1964-11-01), Klingenberg
patent: 3225156 (1965-12-01), Sahrbacker
patent: 3482542 (1969-12-01), Mace
patent: 4024362 (1977-05-01), Morgan et al.
patent: 4096364 (1978-06-01), Lynn et al.
patent: 4191873 (1980-03-01), Woodard
patent: 4259551 (1981-03-01), Ohtani et al.
patent: 4324956 (1982-04-01), Sakakino

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