Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1975-01-10
1976-06-29
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, 310 71, 310 72, H02K 2114
Patent
active
039671470
ABSTRACT:
A low power synchronous motor is disclosed having a rotor including a pair of rotor discs between which is sandwiched a permanent magnet which is polarized such that one of the rotor discs is a north pole and the other is a south pole. The stator includes an energizing winding having a core passing therethrough. A pair of complementary stator plates are secured at each end of the energizing winding to the core and are bent at right angles to form a coplanar stator air gap portion. The coplanar portion of the stator has a notched, circular air gap into which the rotor is positioned. The flat stator plates provide for easy assembly of the motor in a clock movement. The electrical energy coupled to the energizing winding is attenuated by means of a pair of impedance elements connected in series with the energizing winding and situated in the plug of the energizing circuit. The impedance elements reduce the current flow into the clock and hence prevent the possibility of a hazardous shock to someone coming in contact with an exposed wire.
REFERENCES:
patent: 2259359 (1941-10-01), Thompson
patent: 3111641 (1963-11-01), Wilentchik
patent: 3469131 (1969-09-01), Stellwagen
Preiser Ralph H.
Rigazio Anthony W.
Stellwagen Frank W.
Duggan Donovan F.
General Time Corporation
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