Electrical stenographic machine

Typewriting machines – Including interposed inking device for record-medium – Endless ribbon or cartridge therefor

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B41J 326

Patent

active

042472083

ABSTRACT:
A stenographic machine having electrically powered paper advance and permitting control of key stroke length independent of the paper feed length. The print hammers are mechanically actuated by depression of the associated keys, as in a conventional mechanical stenographic machine. Operation of one or more of the keys actuates an optical switch to trigger a monostable multivibrator, the output of which energizes an actuator to rotate the platen, advancing the paper. The rest position of the keys can be controlled to control the key stroke length, without affecting the paper feed length. The paper advance is initiated on the return stroke of the keys, and so each printed word is visible to the operator immediately after the stroke for that word. In one embodiment the multivibrator energizes a solenoid to rotate the platen, while in a second embodiment the multivibrator energizes an electric motor. If desired, the duration of the multivibrator output pulse can be controlled to control the extent of movement of the solenoid plunger or of the electric motor and thus to control the paper advance length.

REFERENCES:
patent: 972940 (1910-10-01), Steele
patent: 1753450 (1930-04-01), Thompson
patent: 1955614 (1934-04-01), Thompson et al.
patent: 2192594 (1940-03-01), Brand et al.
patent: 2593371 (1952-04-01), Watson
patent: 2855082 (1958-10-01), Katz
patent: 3017980 (1962-01-01), D'Onofrio
patent: 3438477 (1969-04-01), Foersterline
patent: 3557927 (1971-01-01), Wright
patent: 3828911 (1974-08-01), Soderstrom
patent: 3892915 (1975-07-01), Budworth
patent: 3964062 (1976-06-01), Flagg et al.
patent: 4181444 (1980-01-01), Heider
patent: 4195940 (1980-04-01), Rekewitz
patent: 4205351 (1980-05-01), Michals

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Electrical stenographic machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrical stenographic machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical stenographic machine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1179080

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.