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:
Jan. 20, 1981
Filed:
Jan. 23, 1979
Applicant:
Inventors:
Assignee:
Citizen Watch Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
2502 / ; 3403 / ;
Abstract
A position detector has first and second timing disks, each having at least one light-transmissive portion. The second timing disk is rotated at a predetermined speed ratio with respect to the first timing disk. A timing sensor is disposed in close proximity to the outer circumference of the first and second timing disks to provide a timing signal when both the light-transmissive portions of the first and second timing disks rotating at predetermined speeds simultaneously pass by the position of the timing sensor.