Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1993-09-21
1996-01-09
Dougherty, Thomas M.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
318129, 318126, H02P 116
Patent
active
054831318
ABSTRACT:
A self-starting swinging apparatus including a free-running oscillation circuit comprising two transistors which are a PNP transistor and an NPN transistor, the bases of both transistors being connected respectively to the collector of one transistor directly and to the collector of the other transistor through a capacitor for setting a time constant; a driving coil connected to the collector of the transistor with the capacitor connected thereto, as a load on the transistor; and a permanent magnet having a relatively repulsive magnetic pole arrangement of the same polarity as, or having a relatively attractive magnetic pole arrangement of a different polarity from, that of a magnetic pole in a magnetic field which ought to be generated in the driving coil when an electric current is fed to the driving coil from the oscillation circuit, the permanent magnet being relatively movable with respect to the driving coil and capable of performing a relative swing motion under the action of an arbitrary restoring force, one of the permanent magnet and the driving coil being fixed to a swinging side and the other fixed to a stationary side in a position near or deviated from a neutral point of a swing motion of the swinging side.
REFERENCES:
patent: 3443242 (1969-05-01), Reich
patent: 3474314 (1969-10-01), Ito
patent: 3973571 (1976-08-01), Suhel
patent: 5086267 (1991-01-01), Janda et al.
Dougherty Thomas M.
Jones Judson H.
Kokusai Display Kogyo Co., Ltd.
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