Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1979-09-04
1982-06-01
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310332, 73516R, H01L 4108
Patent
active
043330290
ABSTRACT:
A seismic sensor for intrusion detection includes a base, a cantilever member of piezoelectric construction extending from the base, and a mass loading the end of the cantilever member remote from the base. The base defines a slot for receiving the end of the cantilever member, and holes, perpendicular to the slot, for receiving electrical conductors. These conductors are configured to orient the cantilever member at 45.degree. relative to the horizontal, providing a sensitivity in both the X direction and the Y direction. A housing encloses the sensor, and another leg extends from the housing at the end remote from the base, enhancing the mechanical coupling between the sensor and the surface on which it is supported.
REFERENCES:
patent: 2045404 (1936-06-01), Nicholides
patent: 2722614 (1955-11-01), Fryklund
patent: 2728869 (1955-12-01), Pohlman
patent: 2830202 (1958-04-01), Feinstein
patent: 3113223 (1963-12-01), Smith et al.
patent: 3186237 (1965-06-01), Forrest
patent: 3486047 (1969-12-01), Seney
patent: 3519009 (1970-07-01), Rubin
patent: 3622813 (1971-11-01), Kumon
patent: 3665259 (1972-05-01), Brailsford
Kolm Eric A.
Kolm Henry H.
Baker Industries Inc.
Budd Mark O.
Jennings James J.
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