Space bar for low profile keyboards

Details Space bar for low profile keyboards Space bar for low profile keyboards

1982-09-23

1983-11-01

Crowder, Clifford D.

Typewriting machines

Key-board or key lever-actuating mechanism

Key lever or space-bar mounting structure

4004951, B41J 508

Patent

active

044127545

ABSTRACT:
A space bar construction is provided for low profile keyboards which will accommodate, with the same construction, from a 1 to 3 space bar up to a 1 to 9 space bar. The arrangement provides a leveling system for the space bar to maintain exactly equal the depressed distances of the space bar at each end thereof through the utilization of a torsion spring for the leveling wire. The torsion spring imparts a constant loading in the leveling wire, and consequently the key top to avoid any noisy "play" between the parts. The unit is assembled complete as a self-contained module for later insertion into a low profile keyboard.

REFERENCES:
patent: 3292761 (1966-12-01), Erpel
patent: 3720801 (1973-03-01), Yanaga
patent: 3750113 (1973-07-01), Cencel
patent: 3771636 (1973-11-01), Kerns, Jr.
patent: 4010838 (1977-03-01), Sims, Jr.
patent: 4090229 (1978-05-01), Cencel et al.
patent: 4300029 (1981-11-01), Master
patent: 4307268 (1981-12-01), Harper
patent: 4384796 (1983-05-01), Denley
Cassell, J. N., "Space Bar Mounting," IBM Technical Disclosure Bulletin, vol. 9, No. 12, May 1967; p. 1773.

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