Magnetically operated power transmission apparatus

Machine element or mechanism – Mechanical movements – Grip units and features

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Details

74DIG4, 74210, 74215, 74193, F16H 1516, F16H 1312, F16H 5534

Patent

active

046165193

ABSTRACT:
An improved stepless power transmission apparatus of the type utilizing magnetic force for making an operative connection between a driving pulley and a driven pulley. The apparatus essentially comprises a primary shaft operatively connected for rotation to a prime mover and having a spirally extending groove formed thereon, a disc-shaped driving pulley displaceably fitted onto the primary shaft in operational engagement with the spirally extending groove, an expansive spring for causing the driving pulley to be normally urged in a direction away from the proper input end of the primary shaft, a truncated cone-shaped driven pulley whose outer conical surface is adapted to come in rolling contact with the peripheral surface of the driving pulley and a secondary shaft made integral with the driven pulley and operatively connected to a power consuming machine or apparatus via a universal joint. The driving pulley is made of a plurality of radially extending permanent magnets with spacers of non-magnetic material interposed in spaces between adjacent ones of the magnets, while the driven pulley is made of non-magnetic material and has a number of rod-shaped magnetizable pieces embedded in the outer conical surface thereof whereby reliable operative connection is made between the pulleys with the aid of magnetic force. The rod-shaped magnetizable pieces may be replaced with axially extending plate-shaped magnetizable pieces.

REFERENCES:
patent: 1036134 (1912-08-01), McLaughlin
patent: 1178834 (1916-04-01), Beland
patent: 1486389 (1924-03-01), Ockfen
patent: 1559975 (1925-11-01), Murray
patent: 1986436 (1935-01-01), Heinze
patent: 2167641 (1939-08-01), Dewan
patent: 2275404 (1942-03-01), Banning
patent: 3048046 (1962-08-01), Cosby
patent: 4067438 (1978-01-01), Spurr et al.
patent: 4459868 (1984-07-01), Sargent

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