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:
Jul. 26, 1983
Filed:
Jul. 02, 1981
Gerald Avison, Cambridge, GB;
Philip T Blenkinsop, Herts, GB;
Spiralux Limited, Kent, GB;
Abstract
A daisy wheel printer wherein a non-contacting sensor (24) is employed to detect the rotational position of the daisy wheel (10) by response to the interrupting action of the character stalks (12, 14) and to produce a train of pulses providing positional information in accordance with said interrupting action. In accordance with the invention, each stalk of the daisy wheel is divided by a longitudinal slit (26) into two or more branches (28, 20) thereby to increase the frequency of the interrupting action and, for a given rotation of the wheel, to cause the sensor to produce a train of pulses (32) containing a number of pulses which is an integral multiple of the number of stalks passing the sensor.