Keyboard switch actuator and locking assembly

Details Keyboard switch actuator and locking assembly Keyboard switch actuator and locking assembly

1978-01-19

1980-02-12

Pieprz, William

Typewriting machines

Case-shift mechanism

For locking case-shift mechanism in position

400479, 400496, 400678, 200 50C, 200 5B, B41J 522, H01H 926, H01H 320

Patent

active

041881362

ABSTRACT:
A switch actuator and position-locking means for module keyboard assemblies such as are used in data-processing machines and the like, utilizing key operable electric switches. The switch actuator is of the type normally associated with what is commonly called a "shift key" or "spacer bar," wherein the finger-engaging portion of the actuator is of a size greater than a single switch module, with the switch adapted to be mechanically locked in operative position and released by successive actuation of a related switch module.

REFERENCES:
patent: 2622160 (1952-12-01), Werner
patent: 3392592 (1968-07-01), Waldorf et al.
patent: 3626120 (1971-12-01), Wright
patent: 3711685 (1973-01-01), Castle
patent: 3863748 (1975-02-01), Trezise
patent: 3882295 (1975-05-01), Madland
patent: 4010838 (1977-03-01), Sims, Jr.
patent: 4071719 (1978-01-01), Madland
Harris, Electronic Keyboard Shiftlock Mechanism, IBM Technical Disclosure Bulletin, vol. 20, No. 10, p. 4037, 3/78.
Crome, Electronic Keyboard Shiftlock Mechanism, IBM Technical Disclosure Bulletin, vol. 20, No. 1, p. 258, 6/77.

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