Title: Typing machine repeat key action

Abstract: A gap is provided between two teeth on a power roll in a typing machine repeat key action, and a cam follower surface is provided on a repeat interposer. A repeat typing operation can be initiated only when the cam follower surface engages the gap. When the key action is not in a repeat position, a latch and a forked lever cooperate to hold the repeat interposer away from the power roll; when the key action is in the repeat position, the forked lever holds a single-action interposer out of the way. The gap prevents skipped and uneven repeat typing operations during high-speed operation by giving the actuator and the typebar enough time to settle into rest position.

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Other info:

Inventors: Sherman, Howard F. (McGraw, NY, US)
Shattuck, Richard E. (Cortland, NY, US)

Application Number: 501123
Filing Date: 1974-08-28
Publication_date: 1976-08-24
Assignee: SCM Corporation (New York, NY)
Primary Class(es): 400/368 400/375, 400/436, 400/440.2
Other Classes:
US Patent Ref:

2714948	Aug, 1955	Schremp et al.	197/17.
2723740	Nov, 1955	Toeppen	197/17.
2798584	Jul, 1957	Kennedy	197/17.
3001625	Sep, 1961	Cetran et al.	197/17.
3342295	Sep, 1967	Hishida	197/17.
3419123	Dec, 1968	Salzberger et al.	197/17.
3623587	Nov, 1971	Link	197/17.
3638775	Feb, 1972	Hishida et al.	197/17.
3706366	Dec, 1972	Hishida et al.	197/17.
3738470	Jun, 1973	Osaka	197/17.

Other Refs:
Primary Examiner: Grieb, Wm. H.
Assistant Examiner:
Attorney: Greb; Kenneth W., Wolson; Milton M.