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:
Apr. 03, 2001
Filed:
Apr. 13, 1999
Applicant:
Inventors:
Terry J. Ahrendt, Mesa, AZ (US);
Stephen G. Abel, Chandler, AZ (US);
Assignee:
AlliedSignal Inc., Morris Township, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 7/14 ;
U.S. Cl.
CPC ...
G01B 7/14 ;
Abstract
A circuit arrangement is described which detects when the moving member of an electromagnetic device is in motion by detecting coincidence of energization of the device coil and a negative first differential of the current/time waveform and a positive first differential of the voltage/time waveform through said coil.