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:
Jun. 12, 1990
Filed:
Feb. 24, 1989
Applicant:
Inventor:
Jeffrey S McGee, San Diego, CA (US);
Assignee:
Cipher Data Products, Inc., San Diego, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ; H01S / ; G01P / ;
U.S. Cl.
CPC ...
324175 ; 25023113 ; 295921 ;
Abstract
A tachometer assembly includes a precision manufactured hub assembly or member having a cylindrical hub and a backing plate for mounting on a shaft of a drive motor, a fine line disc having a plurality of radial reference lines circumferentially disposed about an outer periphery thereof, a hub bore formed in the disc concentric with the reference lines and sized to fit the cylindrical hub within two thousandths of an inch, and a circular spring retainer having a central bore with internal teeth for press fitting on the cylindrical hub and an annular rim for biasing the disc into support engagement with the backing plate.