Typewriting machines – For line-spacing by incremental rotation of platen – By electric-power drive
Patent
1981-04-14
1982-12-28
Sewell, Paul T.
Typewriting machines
For line-spacing by incremental rotation of platen
By electric-power drive
400569, 4005752, 400577, B41J 1992
Patent
active
043659047
ABSTRACT:
A linespacing apparatus includes a slip clutch assembly which is driven by an electric motor. The slip clutch assembly includes a face cam which drives a linkage which, in turn, indexes a platen in order to linespace the platen. The face cam includes an abutment portion which abruptly halts the motion of the linkage and the slip clutch assembly prevents bounce or recoil of the linkage thereby promoting smooth operation of the apparatus. The linkage may be adjusted by an operator to vary the amount of rotation of the platen during each operating stroke of the linkage.
REFERENCES:
patent: 2192351 (1940-03-01), Kleinschmidt
patent: 3433345 (1969-03-01), Gaissert et al.
patent: 3668942 (1972-06-01), Landis et al.
patent: 3978963 (1976-09-01), Baffo
Cryder Albert H.
Mueller Hans W.
Nelson John L.
Shattuck Richard E.
Greb Kenneth W.
Roock Daniel J.
SCM Corporation
Sewell Paul T.
Weinberger Ernest F.
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