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. 28, 1984
Filed:
May. 11, 1981
Yuki Yorifuji, Hirakata, JP;
Seiichi Uyama, Katano, JP;
Katsuhiko Fukutake, Matsuzaka, JP;
Masaharu Miyazaki, Mie, JP;
Matsushita Electric Works, Ltd., Kadoma, JP;
Abstract
A photoelectric switching apparatus includes a light transmitter part having a first built in oscillator and a detachable light transmitter circuit driven by the first oscillator. A detachable light emitter is provided for emitting light in response to a signal from the light transmitter circuit. A light receiver part includes a photoelectric transducer for converting a light signal incident thereon to a converted electric signal and a second oscillator which is separate from the light transmitter part and can be connected to the light transmitter circuit when the light transmitter circuit and the light emitter together are detached from the first oscillator. The light receiver part has a D-flip-flop which reads input data based on the converted electric signal by utilizing an output signal of the first oscillator as its clock pulse. The first oscillator issues an output signal which is substantially synchronous with the converted electric signal to the D-flip-flop by utilizing a signal based on the converted electric signal when the light transmitter circuit and the light emitter are detached from the first oscillator. The first oscillator issues an output signal which drives the light transmitter circuit, to the D-flip-flop when the light transmitter is connected to the first oscillator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile