Selector device for a character-carrying element on printing mac

Details Selector device for a character-carrying element on printing mac Selector device for a character-carrying element on printing mac

1986-05-23

1988-05-31

Pearson, Charles A.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including type-faces movable relative to type-face-carrier

4001544, B41J 106, B41J 126

Patent

active

047477083

ABSTRACT:
The selector device for a character-carrying element of a printing machine comprises a d.c. electric motor whose rotor is capable of selectively rotating in both rotational directions a coupling arrangement comprising a pinion on the motor shaft and a gear on the shaft which carries the hub for mounting a daisywheel printing element and a strobe disc which provides the position signals used to control character selection. A device for taking up clearances minimizes the radial clearances between the pinion and the gear. Thus the motor is mounted on trunnions and urged by a spring to tilt in the sense urging the pinion into the gear.

REFERENCES:
patent: 3094771 (1963-06-01), Robertson
patent: 3384216 (1968-05-01), Thayer
patent: 4324496 (1982-04-01), Link
patent: 4338035 (1982-07-01), Kondo et al.
patent: 4444519 (1984-04-01), Howell et al.
patent: 4504158 (1985-03-01), Ciampi et al.
patent: 4544290 (1985-10-01), Schuiling et al.
patent: 4565128 (1986-01-01), Moriyama et al.
Design of Machine Elements 5th ed. Prentice Hall, Englewood Cliff, NJ 1978 by Spotts, pp. 433-434.
Product Engineering Oct. 26, 1959, pp. 71-75, "18 Ways to Control Backlash in Gearing" by Gutmann.
Machinery's Handbook 20th ed. Industrial Press, NY, NY 1978 by Oberg et al., p. 611.

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