Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1975-08-08
1977-09-27
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310363, H01L 4104
Patent
active
040513971
ABSTRACT:
A two sensitivity level detector for sensing motion of an object on which the detector is placed. The detector includes a sensing unit that responds to movement of the object by supplying electrical current to sensing circuitry adapted to provide an indication of movement upon receipt of such current. The housing of the detector is formed with at least one exterior planar surface and at least one spherical surface so that detector movement in response to movement of the object is dependent upon whether the detector has its planar or spherical surface in contact with the object.
REFERENCES:
patent: 3186234 (1965-06-01), Forrest
patent: 3371234 (1968-02-01), Cady
patent: 3432843 (1969-03-01), Spring
patent: 3611345 (1971-10-01), Pintell
patent: 3631271 (1971-12-01), Shimada
patent: 3710371 (1973-06-01), Whalen
Alexander Cruzan
Budd Mark O.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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