Typewriting machines – Including type-set-assemblage mounted on carrier and... – Imprint by movement of record-medium against type-face
Patent
1986-12-24
1990-03-13
Eisenzopf, Reinhard J.
Typewriting machines
Including type-set-assemblage mounted on carrier and...
Imprint by movement of record-medium against type-face
324226, 32420716, 32420724, 400 55, 400704, B41J 938, B41J 1118, G01B 714
Patent
active
049079018
ABSTRACT:
A method and apparatus including a circuit for measuring the displacement of an electromagnetic device wherein the measuring is effected by utilizing the perturbations which occur in the energizing current of the device when the moveable member contacts a second member during a "gap" measurement, for example. The circuit includes circuitry for obtaining a first derivative signal having indicator portions corresponding to the perturbations. An apparatus including a test block is used for testing center-to-center distances.
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Edmonds Warren S.
Eisenzopf Reinhard J.
Hawk Jr. Wilbert
NCR Corporation
Sessler Jr. Albert L.
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