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. 29, 1987
Filed:
Nov. 06, 1984
Yoshiaki Ogawa, Kamakura, JP;
Nippon Gear Co., Ltd., Fujisawa, JP;
Abstract
A rotary encoder includes a train of gears meshed together in a multi-stage so as to reduce the driving number successively and encoders provided with the gear shafts in desired stages in order to count the number of revolutions of a power input shaft. The driving wheel and its corresponding driven wheel between desired two stages of the train of the gears are formed into such intermittent feed means as permitting idling of the driving wheel by cutting off suitable parts of the meshing portion of at least either one of the driving wheel and driven wheel in accordance with the reduction ratio required in driving number between the desired two stages. The present invention can thus provide economical and highly-accurate rotary encoders of the absolute type, which has a wide counterable range, without need for especially-high accuracy with respect to their designing accuracy, the machining accuracy of their gears, assembling accuracy and the like.