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:
Nov. 06, 1990
Filed:
Apr. 26, 1988
Applicant:
Inventor:
Yoshihiro Takiguchi, Shizuoka, JP;
Assignee:
Hamamatsu Photonics K.K., Shizuoka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356354 ; 25023114 ;
Abstract
A non-contacting revolving speed detecting apparatus for detecting the speed of rotation of a rotary body includes a diffraction plate that may be attached to the surface of the rotary body, a light source for radiating monochromatic laser light onto the diffraction plate, a light detector for detecting an output diffraction pattern of reflected and diffracted light from the diffraction plate, and circuitry for processing an output signal from the light detector means to detect and display the speed of rotation of the rotary body in either a digital or an analog manner.