Electrical generator or motor structure – Dynamoelectric – Reciprocating
Patent
1974-08-29
1978-07-18
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Reciprocating
310 30, 354135, H02K 3500
Patent
active
041017927
ABSTRACT:
A compact electric generator that is powered by a tensioned spring and adapted to serve as an integral and permanent source of electric energy for a photographic camera or other apparatus. The generator includes a permanent magnet, a pole piece and a reciprocally-movable armature that define a magnetic circuit. The permanent magnet is also movable with respect to the pole piece and armature and is so oriented, when the generator is cocked, that the field strength of the magnetic circuit is sufficient to permit the pole piece to magnetically "capture" the armature and hold it in a predetermined position against the action of the tensioned spring. The generator is tripped by displacing the permanent magnet and thus weakening the field strength of the magnetic circuit. This permits the tensioned spring to overcome the magnetic "lock" on the armature and rapidly propel the latter away from the pole piece. The resultant sudden change in the flux density of the magnetic circuit induces a voltage pulse in an associated wire coil.
REFERENCES:
patent: 3065366 (1962-11-01), Speiser et al.
patent: 3153735 (1964-10-01), Branagan et al.
Bratkowski Walter V.
Shoupp William E.
Buleza D. S.
Duggan Donovan F.
Westinghouse Electric Corp.
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