#PIEZOELECTRIC TUNING FORK PDF#

1 shows a perspective view of a flat piezoelectric tuning fork 10 which may be manufactured using microphotolithographic processes from a quartz plate or wafer. Quartz tuning forks mounted in this manner exhibit enhanced suppression of overtone components when the overall length of the tuning fork is in the range of 100 to 500 mils the overall width of the tuning fork is in the range of 15 to 70 mils the thickness of the tuning fork is as much as 30 mils the tines of the tuning fork have a length in the range of 30 to 250 mils and the width of the tines is in the range of 5 to 30 mils. ) and f is the fundamental frequency of the tuning fork in kilohertz. Preferably, the stem includes a forward extension past the edge of the pedestal to the location of the crotch, this forward extension having a length d in the range of 2565n/f to 3135n/f, where d is the shortest distance (in mils) from the forward edge of the pedestal to the crotch n is an integer (1,2,3. To suppress overtone components when the tuning fork is operated at its fundamental frequency, the crotch of the tuning fork is positioned at one of several distinct locations spaced from the forward edge of the pedestal. A pair of tines extend from the forward portion of the stem and define between them a slot which terminates in a crotch where the tines join the stem. A flexural mode quartz tuning fork is supported by the pedestal by attachment of the rearward portion of the stem of the tuning fork to the support surface of the pedestal. In a preferred embodiment of the invention, a microresonator is provided of the type comprising a pedestal having a forward edge and at least one upper support surface. H03H9/15- Constructional features of resonators consisting of piezo-electric or electrostrictive material.H03H9/00- Networks comprising electromechanical or electro-acoustic devices Electromechanical resonators.Assignors: CHUANG, SHIH Application granted granted Critical Publication of US4429248A publication Critical patent/US4429248A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links OF CA reassignment STATEK CORPORATON, A CORP. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Statek Corp filed Critical Statek Corp Priority to US06/267,815 priority Critical patent/US4429248A/en Priority to CH297682A priority patent/CH655424GA3/fr Priority to GB8215276A priority patent/GB2100504B/en Priority to JP57088954A priority patent/JPS57199308A/en Assigned to STATEK CORPORATON, A CORP. Original Assignee Statek Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US06/267,815 Inventor Shih Chuang Current Assignee (The listed assignees may be inaccurate.

#PIEZOELECTRIC TUNING FORK PDF#

Google Patents Mounting apparatus and method for piezoelectric tuning forkĭownload PDF Info Publication number US4429248A US4429248A US06/267,815 US26781581A US4429248A US 4429248 A US4429248 A US 4429248A US 26781581 A US26781581 A US 26781581A US 4429248 A US4429248 A US 4429248A Authority US United States Prior art keywords tuning fork stem pedestal tines mils Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4429248A - Mounting apparatus and method for piezoelectric tuning fork US4429248A - Mounting apparatus and method for piezoelectric tuning fork

Piezoelectric tuning fork