Keyboard space bar stabilizer

Details Keyboard space bar stabilizer Keyboard space bar stabilizer

1982-03-18

1983-05-24

Burr, Edgar S.

Typewriting machines

Key-board or key lever-actuating mechanism

Key lever or space-bar mounting structure

4004951, 200340, B41J 508

Patent

active

043847960

ABSTRACT:
A keyboard has a space bar centrally mounted on a plunger and supported at its ends by a torsion rod. The torsion rod has crank arms at its ends which are connected to the space bar and serve to distribute the actuating force on the space bar so that the plunger will move smoothly up and down and not bind. An attachment element in the nature of a yoke is provided for connecting the crank arms of the torsion rod to the space bar. A spring connected to the space bar flexibly engages the crank arm. The attachment element accommodates the natural, arcuate motion of the crank arm while simultaneously maintaining engagement with the crank arm to secure the space bar to the torsion rod and prevent the space bar from rattling or vibrating.

REFERENCES:
patent: 3711685 (1973-01-01), Castle
patent: 3720801 (1973-03-01), Yanaga
patent: 3962556 (1976-06-01), Kravchuck
patent: 4010838 (1977-03-01), Sims, Jr.
IBM Technical Disclosure Bulletin, "Self Biasing Space Bar Stabilizer Mechanism" vol. 21 No. 9 Feb. 1979 pp. 3725-3726 by Harris.

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