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:
Feb. 23, 1988
Filed:
Jul. 29, 1986
Alps Electric Co., Ltd., , JP;
Abstract
An optical rotary encoder is formed by a control pulse generator portion and a selector switch portion which are of the unitary construction. The control pulse generator portion is formed by a code plate having a plurality of alternately formed reflecting and non-reflecting areas, a plurality of light emitting and receiving elements facing the code plate and an inner shaft for rotating the code plate. The selector switch portion is formed by a second code plate having a plurality of light transmitting apertures, a plurality of light emitting elements facing the second code plate, a plurality of light receiving elements provided on the opposite side of the second code plate from those light emitting elements and an outer shaft for rotating the second code plate. The inner and outer shafts are connected to each other and have a common axis of rotation.