Machine element or mechanism – Mechanical movements – Reciprocating to or from oscillating
Patent
1981-09-17
1984-08-21
Smith, Gary L.
Machine element or mechanism
Mechanical movements
Reciprocating to or from oscillating
200160, 200 681, 200 77, 250229, F16H 2518
Patent
active
044663021
ABSTRACT:
An electrical switch actuation mechanism is described. Principally useful for keyboard switch data entry devices, the mechanism operates by means of cammed surfaces to produce a generally nutating, rocking snap action. Depression of the key button moves a stem with cam surfaces on it which contact cammed surfaces on a rocking plate member. The action produces a first rocking motion in a first axis followed by second and third combined snapping and rocking actions about second and third axes in that plane, but at different angular orientations from the first action. A hypothetical vertical axis constructed through the plane of the rocking member will nutate or precess in a generally orbital fashion about a central pivot point. The motion of the plane of the rocking plate may be easily coupled to any of a variety of transducer devices be they contacts, capacitive, optical or inductive.
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IBM, TDB, vol. 21, No. 9, Feb. 1979, pp. 3727-3728.
IBM, TDB, vol. 20, No. 11B, Apr. 1978, pp. 4885-4888.
Duffield Edward H.
International Business Machines - Corporation
Raskob, Jr. Anthony W.
Smith Gary L.
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