The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 1979
Filed:
Mar. 08, 1978
Francis H Shepard, Jr, Summit, NJ (US);
Realty & Industrial Corporation, Morristown, NJ (US);
Abstract
A drive arrangement for a single element typewriter in which the element is mounted on a moving carrier, for facilitating proportional spacing incremental movements of the carrier. The carrier is bidirectionally driven by a servo motor which rotates bidirectionally in response to the output of a digital counter. The counter counts in one direction in response to input stepping pulses as well as pulses corresponding to incremental rotational movements of the drive shaft in a given direction, and counts in the other direction in response to pulses corresponding to incremental rotational movements of the drive shaft in the opposite direction. The pulses corresponding to incremental rotational movements of the drive shaft are optically derived from a rotating disk having alternating transparent and opaque radial striations. Provision is made for automatic carrier return by setting the output of the counter accordingly.