Electrical generator or motor structure – Dynamoelectric – Reciprocating
Patent
1974-11-07
1976-02-24
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Reciprocating
310 37, 310 49R, 335228, H02K 706
Patent
active
039406423
ABSTRACT:
The invention relates to a stepping motor having at least one electromagnet disposed in a casing, a shaft which is mounted for rotation in the casing and on which is rotationally fixed a rotor which in turn is rotationally fastened to an armature mounted on the shaft for longitudinal sliding and cooperating with the electromagnet, and further having a first ball race concentric to the shaft and fastened to the casing and a second ball race cooperating therewith and mounted for rotation in the casing, balls being disposed between the races and the tracks of the latter being so shaped that an axial force on the rotatable ball race result in a rotary movement of the latter, and further having on the armature a flange which engages behind the rotatable ball race and which carries spur toothing having inclined flanks and cooperating with corresponding spur toothing on the rotatable ball race, and having restoring springs imparting to the rotatable ball race an initial stress oppositely to the direction of rotation produced by the armature, and having a catch device determining the steps.
REFERENCES:
patent: 3202849 (1965-08-01), Neal
patent: 3302045 (1967-01-01), Dotto
patent: 3320822 (1967-05-01), Tatom
patent: 3351789 (1967-11-01), Bertling
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