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:
Oct. 19, 1993
Filed:
Nov. 27, 1990
Applicant:
Inventors:
Munenori Kimura, Aichi, JP;
Takuji Magara, Aichi, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23H / ;
U.S. Cl.
CPC ...
219 6913 ; 219 6912 ; 219 6916 ; 219 6919 ; 324559 ;
Abstract
A device for positioning a first and second conductive elements and, in particular, detecting contact at a gap therebetween without causing damage to either element. A pulse voltage, having a low duty, is applied to the gap. The occurrence of a contact is identified by a voltage drop at the gap, which is detected by comparing the gap voltage to a reference. A control circuit, comprising a flip-flop or one-shot operative in synchronism with the source of pulse voltage, generates a contact identification signal in response to the detection of a voltage drop at the gap.