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:
Jul. 01, 1991
Filed:
Oct. 01, 1989
Applicant:
Inventor:
Orgal T Holland, Fredericksburg, VA (US);
Assignee:
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01P / ;
U.S. Cl.
CPC ...
324166 ; 324177 ;
Abstract
A tachometer for measuring speed and armature position of a motor is disced whereby the counter electromotive force present in spikes on the power terminals are shaped, analyzed and displayed as tachometer information. The spikes occur as commutation takes place allowing a coarse angular armature shaft position to also be derived.