Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1980-07-14
1982-10-19
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310367, 310368, 310320, H01L 4108
Patent
active
043552579
ABSTRACT:
A thickness shear type piezoelectric vibrator comprises a quartz crystal plate of uniform thickness having a rectangular vibrating portion and integral rectangular supporting portions of less width extending from opposite ends of the vibrating portion. Electrodes of conducting material have elongated rectangular active portions on obverse and reverse surfaces of the vibrating portions of the plate. The electrode on the obverse surface of the plate has an integral lead portion extending along the obverse surface of only one of the supporting portions. The electrode on the reverse surface of the plate has an integral lead portion extending along the reverse surface of the other only of the supporting portions so that an electric field is applied by the electrodes only to the vibrating portion of the plate and not to the supporting portions.
REFERENCES:
patent: 2306909 (1942-12-01), Sykes
patent: 3339091 (1967-08-01), Hammond et al.
patent: 3561831 (1971-02-01), Karrer et al.
patent: 4012648 (1977-03-01), Engdahl
patent: 4035674 (1977-07-01), Oguchi et al.
patent: 4071796 (1978-01-01), Zumsteg
patent: 4124809 (1978-11-01), Engdahl et al.
Ebihara Yasunori
Kawashima Hirofumi
Watanabe Akira
Adams Bruce L.
Budd Mark O.
Burns Robert E.
Kabushiki Kaisha Daini Seikosha
Lobato Emmanuel J.
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