Keyboard assembled from individual keys

Details Keyboard assembled from individual keys Keyboard assembled from individual keys

1979-02-21

1982-09-14

Coven, Edward M.

Typewriting machines

Key-board or key lever-actuating mechanism

Key-cap or key-stem structure

400475, 400472, 400479, B41J 508

Patent

active

043492860

ABSTRACT:
A keyboard which can be assembled from individual keys is disclosed. The individual keys include a key button, a key shaft for switching electric circuits, a stationary key body, and a spring for influencing the relative movement between the key shaft and key body. A base structure having cutouts is provided for receiving the keys. A circuit board carrying control elements cooperates with the key arrangement. The key buttons have several receiving openings for the key shafts. The cutouts in the base structure and the arrangement of the control elements on the circuit board are staggered relative to each other from row to row by a half spacing.

REFERENCES:
patent: 3169701 (1965-02-01), Dombrowski
patent: 3890480 (1975-06-01), Berling et al.
patent: 3900712 (1975-08-01), Fukao
patent: 3962556 (1976-06-01), Kravchuck
patent: 4124313 (1978-11-01), Schmidt et al.
patent: 4158130 (1979-06-01), Speraw et al.
Sales Literature, "Kienzle Daten Systeme", `3000`.

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