Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1982-01-21
1984-10-09
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310368, 310348, H01L 4108
Patent
active
044764111
ABSTRACT:
A thickness shear quartz crystal oscillator has two major surfaces which extend in the direction the of X axis of the crystal and which are 5mm to 10mm long. X-Z plane defined by the X axis and Z axis of the crystal is rotated about the X axis by 35.degree.08' to 35.degree.16' so that the major surfaces are parallel to an X-Z' plane defined by the X axis and an imaginary Z' axis inclined to the Z axis at 35.degree.08' to 35.degree.16'. One of the major surfaces is displaced in the direction of the Z' axis to thereby cause the side faces of the oscillator to incline at an angle of 4.degree. to 6.degree..
REFERENCES:
patent: 2169301 (1939-08-01), Sykes
patent: 3311854 (1967-03-01), Mason
patent: 4234812 (1980-11-01), Kawashima
"Keeping the Bell System in Tune and One Time", Bell Laboratories Record, Band 55, No. 5, May 1977, pp. 137-141.
"Understanding Precision Crystal Time Bases", Electronics, Band 51, No. 17, Aug. 17, 1978, pp. 114-118.
Proceedings of the 32nd Annual Symposium on Frequency Control, 1978, pp. 267-276.
The Journal of the Acoustical Society of America, vol. 42, No. 6, 1967, pp. 1268-1277.
Akutsu Satoshi
Ebihara Susumu
Okazaki Masanobu
Budd Mark O.
Nihon Dempa Kogyo Co. Ltd.
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