Apparatus for adjusting the rotational speed of a drive mechanism
AssigneesKarl Vockenhuber, Raimund Hauser
InventorsGottfried Pammer, Rudolf Kvasnicka
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Abstract
The invention concerns a device for adjusting the rotational speed of a drive mechanism preferably of the type used in a movie projector and provided with a drive motor having a stationary fixed stator, a rotor rotating in only one direction and connected to a friction wheel with at least one, preferably two, oppositely disposed friction discs fixed on a drive shaft for driving engagement with the friction wheel, the friction wheel being adjustable with respect to the friction discs in a radial direction to thereby adjust the rotational speed of the driving mechanism.
Claims6
Apparatus for adjusting the rotational speed of a drive mechanism of the type incorporated in a movie projector or the like, comprising, in combination, a drive motor having a stationary mounted stator and a rotor including a shaft rotating in one direction with said rotor and stator arranged for relative movement, a rotatably mounted drive shaft, at least one friction disc mounted on said drive shaft,
- a friction wheel mounted on said rotor for movement by said rotor in a radial direction with respect to said friction disc, an adjustment mechanism engageable with said motor shaft in an axial direction for moving said rotor with respect to said stationary stator for driving engagement between said friction wheel and said friction disc in either a first or second radial position with respect to said disc for adjusting the rotational speed of the drive mechanism.
Dependencies are inferred from the claim text.