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. 11, 1980
Filed:
Sep. 28, 1979
Applicant:
Inventor:
Jack Schwarzschild, Stamford, CT (US);
Assignee:
Timex Corporation, Waterbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04B / ; G04C / ; G08B / ;
U.S. Cl.
CPC ...
368 72 ; 368245 ; 368276 ; 3403 / ;
Abstract
A watch includes a piezoelectric wafer mounted on a membrane held by its peripheral edge inside a watch caseback. A frequency adjustment device mounted in the caseback includes a rotatable arm contacting the membrane and movable to adjust the resonant frequency of the membrane and piezoelectric crystal vibrating assembly. The frequency of the piezoelectric transducer may be adjusted to match a desired frequency of an electrical or sound signal.