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:
May. 20, 2014
Filed:
Oct. 23, 1997
Donald W. Church, Halifax, CA;
Douglas George Pincock, Halifax, CA;
Theodore Gerard Bushnik, Dartmouth, CA;
John Roderick Campbell, Dartmouth, CA;
Gregory Emile Chauvin, Hatchett Lake, CA;
Donald W. Church, Halifax, CA;
Douglas George Pincock, Halifax, CA;
Theodore Gerard Bushnik, Dartmouth, CA;
John Roderick Campbell, Dartmouth, CA;
Gregory Emile Chauvin, Hatchett Lake, CA;
J.J. MacKay Canada Limited, , CA;
Abstract
A proximity detector for detecting the presence of a coin or token in a coin chute, comprising a pair of axially aligned coils disposed on opposed sides of the chute; a common-emitter amplifier having a base and a collector providing a detector output, one of the coils being connected to the collector and the other of the coils being connected to the base.