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:
Mar. 11, 1980
Filed:
Sep. 29, 1977
Henry R Killian, Sugarland, TX (US);
Other;
Abstract
A digital control device wherein both an input drive, which, in response to signal pulses, produces a specific increment rotation of an output drive, and a feedback drive, which is driven in proportion to the incremental rotation so produced, are connected to drive a differential gear device, the output of which drives a pair of multi-stage, intermittent drive counting devices, one in a forward direction, the other in reverse. Movement of the last stages of such devices are conditioned to activate said output drive and they are set in null positions wherein a very few advancing increments of movement of the first stage will generate incremental movement of all subsequent stages. When the input drive starts, the last stage of only the advancing counter will advance and activate the output drive in a direction to oppose the input. Return of the counters to null positions will deactivate the output drive.