Magnetic brakes and clutches
OwnerCharles B. Fisher, Sidney T. Fisherinventors
Life of this patent
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Abstract
Drum-type brakes and band-type clutches which are activated by expansion or compression, or both, of one or more concentric magnetic members, with conducting windings carrying electric currents. Circular annular mating members carrying one or more conducting windings expand or contract in diameter, due to magnetic forces caused by currents in the winding or windings, and operate as a brake or a clutch.
Claims7
A frictional rotational torque transfer device, comprising external and internal circular cylindrical annular mating members, at least one of said members being magnetic and carrying at least one toroidal insulated conducting winding, and at least one of said members carrying a friction lining, which is actuated by changes in mechanical dimensions, caused by circumferential magnetic fields induced in one or both of said mating members of said device, by electric currents in said windings, which change the rotational friction between at least one of said members and at least one of said frictional linings.
Dependencies are inferred from the claim text.