Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-02-07
1998-08-11
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 40MM, 310 42, 310 47, 310 48, 310 73, 310 98, 362119, 362120, 362192, H02K 2124, H02K 1500, F21V 3100
Patent
active
057931305
ABSTRACT:
A miniature electric generator and lighting apparatus is provided for use in a power-driven tool. The apparatus includes a rotor assembly 22 having a permanent magnet, and a stator assembly 24 within which the shaft and magnet are received. The stator assembly 24 includes a pair of electrically conductive arms 38 extending on opposite sides of the rotor, an electrically conductive shank 40 connecting the arms together, and a winding 36 of electrically conductive wire presenting a pair of opposed ends. A lamp 54 is connected to the ends of the winding by a circuit 52 so that it is powered upon rotation of the shaft. A housing assembly 30 supports the stator assembly 24 on the output shaft of the tool, and is secured to the tool. The housing assembly 30 and cooperating structure 42 position the stator assembly 24 relative to the magnet 32 to prevent contact between the stator element 34 and the magnet during rotation of the output shaft 14. The generator 22, 24 can alternately be used to power a battery charger or any other mechanism, and an extension cord, drop cord or the like can be employed to supply electricity from the generator to a remote mechanism to be powered.
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Dougherty Thomas M.
Nguyen Tran N.
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