Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1983-07-08
1984-06-19
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310367, 310366, H01L 4108
Patent
active
044555024
ABSTRACT:
This disclosure is directed to an improved strip type or rectangular type piezoelectric resonator utilizing length mode vibration, which includes a piezoelectric ceramic substrate, and first and second main electrode faces formed on opposite surfaces of the piezoelectric ceramic substrate, and which is characterized in that there is further provided a groove formed in one of the first and second main electrode faces so as to extend over an entire length of the piezoelectric ceramic substrate in a direction parallel to its longitudinal direction, and at a position deviated from a center in a widthwise direction of the piezoelectric ceramic substrate by more than 2% of the width of the piezoelectric ceramic substrate.
REFERENCES:
patent: 2018246 (1935-10-01), Beard
patent: 2543500 (1951-02-01), Kettering et al.
patent: 3036231 (1962-05-01), Henry
patent: 3421109 (1969-01-01), Wiggins et al.
Budd Mark O.
Murata Manufacturing Co. Ltd.
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