Title: Motorized X-ray tube assembly

Abstract: A motorized device for rotating i.e. tilting the X-ray tube assembly in a linear and/or complex tomography radiographic system comprising the combination of a permanent magnet stepper motor coupled to a rotatable X-ray tube assembly through a helicon gear set and a spur gear set. The X-ray tube assembly incrementally rotates one angular step with each input drive pulse applied to the stepper motor from a pulse generator operated in accordance with a control input applied from an electronic control system in response to sensed positional change of the X-ray tube assembly. The stepper motor when unenergized is nevertheless adapted to provide a holding torque capability which eliminates the need for a separate brake assembly.

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Inventors: Bunch, Laverne R. (Baltimore, MD, US)

Application Number: 845132
Filing Date: 1977-10-25
Publication_date: 1979-03-20
Assignee: CGR Medical Corporation (Baltimore, MD)
Primary Class(es): 378/26 378/27, 378/91, 378/181
Other Classes:
US Patent Ref:

3708664	Jan, 1973	Bock et al.	250/61.
3733487	May, 1973	Louche et al.	250/61.

Other Refs:
Primary Examiner: Church, Craig E.
Assistant Examiner: O'Hare, Thomas P.
Attorney: Brady, O'Boyle & Gates