Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1990-04-26
1991-06-11
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
34082544, 34082546, 310268, H01L 4104
Patent
active
050235044
ABSTRACT:
A piezo-electric resonant vibrator is described comprising a resonant armature having a centrally located weight, and at least four planar circular spring members which provide a restoring force normal to the movement of the weighted armature within a non-magnetic housing which encloses and supports the armature. A piezo-electric driver is coupled to the armature for inducing movement of the armature at a predetermined resonant frequency. A ferromagnetic plate is mounted to the housing and magnetically couples to a magnet which is coupled to the weight to maintain tension on the armature when an excitation signal is not supplied to the piezo-electric driver, and the armature is at equilibrium.
REFERENCES:
patent: 1882394 (1932-10-01), Pierce
patent: 2144343 (1936-01-01), Newnham
patent: 4132910 (1979-01-01), Kiss et al.
patent: 4439640 (1984-03-01), Takaya
patent: 4491759 (1985-01-01), Kunz et al.
patent: 4720710 (1988-01-01), Akahori et al.
patent: 4918438 (1990-04-01), Yamasaki
Holden Irving H.
Mooney Charles W.
Budd Mark O.
Dougherty Thomas M.
Ingrassia Vincent B.
Koch William E.
Macnak Philip P.
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