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:
Dec. 08, 1981
Filed:
Apr. 12, 1979
Applicant:
Inventor:
Kunio Makita, Chiryu, JP;
Assignee:
Nippondenso Co., Ltd., Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08C / ; G01B / ;
U.S. Cl.
CPC ...
34087031 ; 310168 ; 324208 ; 324174 ; 324 / ; 3403 / ;
Abstract
A single sensor is located close to a ring gear on the periphery of which teeth are disposed equiangularly except at an angular reference position. When the ring gear rotates, the sensor generates output signals, with the period of the output pulse which corresponds to the reference position being larger than that of the other output pulses which correspond to the angular positions. A capacitor is charged during half of each the periods of the output pulses, so that the reference position can be discriminated by comparing the amplitude of the charged voltage or the discharging period of the capacitor with a predetermined value.