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. 10, 2002
Filed:
Jan. 02, 2001
Applicant:
Inventor:
Hiroo Fujita, Tokorozawa, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/34 ; G01B 1/114 ;
U.S. Cl.
CPC ...
G01D 5/34 ; G01B 1/114 ;
Abstract
A dimension measuring apparatus comprises a moving member adapted to move for dimension measurement, a grid device for moving with the moving member, an optical device for irradiating the grid device, a light receiving device for receiving the light radiated from the optical device and transmitted through the grid device and for generating a non-sinusoidal wave signal in accordance with the movement of the moving member, and a processing device for measuring the moving distance of the moving member based on the non-sinusoidal wave signal.