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:
Sep. 14, 1982
Filed:
Jun. 19, 1979
Hideo Hoshi, Tokyo, JP;
Shiro Mitsugi, Tokyo, JP;
Hiroichi Teruyama, Tokyo, JP;
Hideo Tabata, Tokyo, JP;
Kabushiki Kaisha Daini Seikosha, Tokyo, JP;
Abstract
A quartz crystal tuning fork resonator has a pair of vibratable arms vibratable in the flexural mode in response to excitation of driving electrodes positioned at both major surfaces and both side surfaces of each vibratable arm. The vibratable arms have a width w as measured in the widthwise direction of the major surfaces, a thickness t, and are spaced apart a distance s and the vibratable arms are dimensioned so as to satisfy the relationships s/t.gtoreq.1 and s/w.gtoreq.0.4. The resonator preferably has an overall length L.ltoreq.5 mm, an overall width W.ltoreq.1 mm and a thickness t>50 and is formed by etching. The driving electrodes are configured to establish an electric field component directed parallel to the major surfaces to thereby drive the vibrating arms in the flexural mode.