Friction bearing system for a rapidly rotating shaft

Details Friction bearing system for a rapidly rotating shaft Friction bearing system for a rapidly rotating shaft

1988-11-04

1989-10-10

Hannon, Thomas R.

Bearings

Rotary bearing

Plain bearing

350274, 384446, F16C 3510, G02B 2604

Patent

active

048727695

ABSTRACT:
In a friction bearing system for a rapidly rotating shaft of an apparatus for measuring the optical absorption of a sample under analysis by way of an optical radiation source projecting a beam on the sample, the chopper system for the periodical interruption of the beam includes a rotatably mounted chopper disk provided with light-admitting openings and a controlled-speed drive system, as well as a radiation detector for the light affected by the sample. Both ends of the shaft fixedly joined to the chopper disk are provided with pivots corresponding to bushes, one of which is held by a spider which is affixed to the housing part that holds the other bush. The spider is provided with a bore running at an angle to the shaft, and the longitudinal axis of this bore intersects the axis of rotation of the shaft. A magnet is held for longitudinal displacement in the bore and its field acts upon a ring disposed on the shaft in order to assure the quiet and wear-free spinning of the chopper disk.

REFERENCES:
patent: 4149365 (1979-04-01), Kobayashi et al.
patent: 4152594 (1979-05-01), Schunck et al.
patent: 4655616 (1987-04-01), Ducan
patent: 4719352 (1988-01-01), Miyatake et al.
patent: 4773210 (1988-09-01), Landwehrkamp et al.

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