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:
Oct. 18, 1983
Filed:
Apr. 24, 1981
Applicant:
Inventor:
Shigeru Kogure, Suwa, JP;
Assignee:
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310370 ; 310351 ; 310352 ;
Abstract
A mode coupled tuning fork type quartz crystal resonator is mounted to a plug using support members of selected contour and dimensions to prevent acoustic energy loss from the plug and to avoid reduction in Q factor. A bend of 180 degrees in the support member and controlled length are factors in isolating fundamental and first overtone vibrations in flexure and fundamental torsional vibrations so as to reduce energy loss, maintain stable oscillation and improve the Q factor. A laterally extended base portion and/or tapered ends of the tuning fork arms enhance the beneficial results.