Vibration detecting device

Details Vibration detecting device Vibration detecting device

1989-09-22

1990-12-18

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

73 35, H01L 4108

Patent

active

049788833

ABSTRACT:
A vibration detecting device which comprises a bush of metal having a cylindrical portion at its center; a casing of a resinous material which is formed by insertion-molding along with the bush so as to form a receiving portion at the outer side of the cylindrical portion; a piezoelectric element, a terminal and a weight placed along the outer periphery of the cylindrical portion of the bush in the receiving portion; a nut fastened to the cylindrical portion to secure the piezoelectric element, the terminal and the weight, and a filler for sealing the nut and the other elements received in the receiving portion, wherein one side of the receiving portion with respect to the vibration detecting direction is open.

REFERENCES:
patent: 3060333 (1962-10-01), Bradley, Jr.
patent: 3389276 (1968-06-01), Gradin et al.
patent: 3400284 (1968-09-01), Elazar
patent: 4225802 (1980-01-01), Suzuki et al.
patent: 4359658 (1982-11-01), Cartier
patent: 4399705 (1983-08-01), Weiger et al.
patent: 4660409 (1987-04-01), Miyata et al.
patent: 4869095 (1989-09-01), Komurasaki

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