摘要 |
The present invention provides several improvements in a slip ring ( 36 ) that is adapted to provide electrical contact between a rotor ( 42 ) and stator ( 40 ). In one aspect, a brush tube ( 39 ) is crimped around the upper marginal end portions of a plurality of individual fibers ( 38 ) inserted therein. In another aspect, a collimator tube ( 41 ) extends downwardly beyond the end of the brush tube to limit lateral movement of the fibers in the bundle when the rotor rotates. In yet another arrangement, a spring ( 55, 56 ) is arranged to bear against a current-carrying conductor to adjustably vary the force by which the lower ends of the fibers are urged to move toward the rotor.
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