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:
Aug. 14, 1984
Filed:
Feb. 17, 1982
Applicant:
Inventor:
William F Hill, Stafford, GB;
Assignee:
Lucas Industries Limited, Birmingham, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08G / ; G08G / ; G01B / ;
U.S. Cl.
CPC ...
34087031 ; 324174 ; 324208 ; 340672 ;
Abstract
A transducer includes a winding in a magnetic circuit including a magnet, a pole-piece and a disc which has pairs of protuberances in its periphery, each pair being connected by a web of lesser radial distance from the disc axis than the peaks of the protuberances. The winding is connected in a discriminating circuit including an integrator which integrates the winding output, and a zero crossing detector. An output circuit receives signals from the integrator and the zero crossing detector and produces an output signal for the whole period during which the web between two protuberances is passing the pole piece.