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. 04, 2005
Filed:
Dec. 04, 2002
Peter Heimlicher, Freiburg, CH;
Peter Heimlicher, Freiburg, CH;
Optosys S.A., , CH;
Abstract
Photoelectric proximity switch for detecting the presence of an object in a monitored area. A light pulse transmitter emits transmitting light pulses into the monitored area. The pulses are triggered by an output signal of a random signal generator or a pseudo-random signal generator and are emitted with a time interval between them. A light receiver is arranged in relation to the light pulse transmitter and to the monitored area such that in the absence of an object to be detected in the monitored area, the receiver receives essentially no light from the light pulse transmitter, but in the presence of an object to be detected in the monitored area, it receives such light from the light pulse transmitter due to reflection that a receiving signal evaluating device connected to the light receiver and to random signal generator or the pseudo-random signal generator delivers an object detection signal.