Rotary drive systems

Details Rotary drive systems Rotary drive systems

1977-12-01

1980-04-15

Herrmann, Allan D.

Machine element or mechanism

Mechanical movements

Rotary to intermittent unidirectional motion

74427, F16H 2704

Patent

active

041977556

ABSTRACT:
In radiographic apparatus of the kind known as computerized tomographic (CT) apparatus, a source of radiation is moved around a patient to irradiate the patients body from a plurality of directions. In certain types of CT apparatus the motion includes a stepped rotation. During each rotational step reaction forces are transferred to the fixed part of the apparatus and for rapid movements the reaction forces can become excessive. To reduce the reaction forces a compensating means is provided to oppose the reaction forces. This may be a resilient member such as a spring and may react against a member, such as a cam, which is shaped to adjust the compensating force to a suitable value.

REFERENCES:
patent: 1037205 (1912-09-01), Clark
patent: 1113172 (1914-10-01), Fassett
patent: 1322599 (1919-11-01), Montgomery
patent: 1603557 (1926-10-01), Schleier
patent: 3049017 (1962-08-01), McDonald et al.
patent: 3778614 (1973-12-01), Hounsfield
patent: 3848477 (1974-11-01), Giandinoto
patent: 3946234 (1976-03-01), Hounsfield

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