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:
Sep. 01, 1981
Filed:
Aug. 14, 1979
Fumio Kamiya, Kyoto, JP;
Hisatoshi Nodera, Kusatsu, JP;
Kenji Ueda, Muko, JP;
Hiroyuki Miyamoto, Kameoka, JP;
Omron Tateisi Electronics Co., Kyoto, JP;
Abstract
A proximity switching device is disclosed, which comprises an oscillating circuit including a detection coil, a signal producing circuit for producing a detection signal in response to an oscillating amplitude of said oscillating circuit, and an output circuit for producing an output signal in response to said detection signal. The output circuit comprises a pair of Darlington circuits and a driving transistor for driving said Darlington circuits, one of said Darlington circuits operating as a NPN transistor and another operating as a PNP transistor, said Darlington circuit being connected complementarily for providing complementary output signals.