Typewriting machines – Key-board or key lever-actuating mechanism – Including means generating a signal for type selecting or...
Patent
1982-06-01
1984-04-03
Burr, Edgar S.
Typewriting machines
Key-board or key lever-actuating mechanism
Including means generating a signal for type selecting or...
400485, 400490, 340365R, 200 5R, B41J 528
Patent
active
044405154
ABSTRACT:
A keyboard (61) includes plural keybar actuators (11) each including plural keys (19, 23, 27, 31) hingedly interconnected (25, 29, 33) and a sensing device (13). The keys of a keybar actuator are all actuated by a common finger (45) in touch typing and therefore are not jointly actuated. Depression of one key causes the keybar actuator (11) to pivot and the sensing device (13) indicates which key is depressed depending upon the amount of keybar actuator rotation. Alternate sensing devices include individual contact switches (79-81) associated with each key.
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Burr Edgar S.
Girvin, Jr. John W.
International Business Machines - Corporation
Wiecking David A.
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