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:
Jan. 03, 1989
Filed:
Aug. 05, 1987
Hiroshi Ishida, Tokyo, JP;
Mitsuyuki Taniguchi, Tokyo, JP;
Fanuc Ltd., Yamanashi, JP;
Abstract
A circuit for an encoder apparatus of an incremental-type construction, including: a unit mechanically joined to a movable machine; a unit for outputting at least two signals having a phase shift and a periodic waveform in response to movement of the unit; a battery-type power supply; and an electric ciruit including a circuit for generating a timing pulse having predetermined frequency and pulse width, a circuit for detecting a change of the signals from the signal outputting circuit and for outputting a pulse signal in response to the change of signals, and a circuit for counting the pulse signal from the signal-change detecting circuit. The apparatus may be optical or magnetic in construction.