General Electric Company

Robert J Loyzim

John P Grajewski

An X-ray table base, an intermediate support mounted on the base for moving bidirectionally, and a carriage with a patient cradle on it mounted for moving bidirectionally on the support. There are individual servomotors for driving the support and cradle, respectively. Each servomotor drives an analog tachometer. The tachometer signals are compared with ramp signals. When, for example, the intermediate support nears the limit of its forward travel, its servo amplifier receives a decreasing ramp signal and the servo amplifier for the cradle motor receives a concurrent increasing ramp signal such that the support decelerates to zero velocity at a predetermined rate and the cradle accelerates to the previous constant velocity of the support at a rate that results in the cradle moving at a constant rate relative to the base.

Sectional X-ray table having dual servo drives

A braking system for a mobile medical diagnostic device having forward support wheels operatively associated with proportional electromechanical brakes and a single central steerable wheel assembly at the rear of the device. Means are provided for generating throttle command signals and actual velocity signals and for comparing the two and for applying current to the proportional brakes to a degree which is proportional to the difference in those two signals. When this difference exceeds a predetermined level, a motor brake is further actuated to augment the proportional braking system. Also included is a means for automatically reducing the throttle command signal in proportion to the degree that the steerable wheel assembly is turned from the straight-ahead position.

Growing community of inventors

Dousman, WI, United States of America

Robert J Loyzim