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. 23, 1985
Filed:
Mar. 26, 1984
Applicant:
Inventor:
William F Hill, Stafford, GB;
Assignee:
Lucas Industries, Birmingham, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; F02P / ;
U.S. Cl.
CPC ...
324208 ; 324232 ; 123617 ;
Abstract
An ignition system transducer comprising a ferro-magnetic disc mounted on a distributor shaft and having four pairs of protuberances, the spacing of the two protuberances of each pair corresponding to the maximum and minimum spark advance positions. Rotation of the protuberances about the distributor shaft is detected by a first variable reluctance pick-up mounted in a fixed position, and by a second variable reluctance pickup movable in accordance with an engine load sensor. These two pick-ups in conjunction with signal generators produced a fixed phase waveform, and a variable phase waveform which varies in accordance with engine load.