Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1985-06-18
1988-09-06
Dobeck, Benjamin
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
318281, 318434, 318488, 5 66, G05B 1132
Patent
active
047695846
ABSTRACT:
An electronic controller for a therapeutic table with a shaft encoder for sensing the angular position of a movably mounted patient support and means for controlling the movement in accordance with a comparison between the sensed angular position and an angular limit reference. The left and right preselected tilt angles are alternately automatically selected as the reference. Fault conditions, such as a jam condition, occurs when the drive mechanism to briefly reverse to automatically correct the condition prior to power termination. In the event of excessive tilt, actuation of limit switches results in reversal and movement of the patient support to a horizontal position before power termination. The jam condition is sensed by a strain gauge for detecting the work required for movement of the patient support and comparing it to a preselected work reference. In the event of drive clutch disengagement, power to the motor is terminated.
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Irigoyen Mario J.
Skubic Michael J.
Dobeck Benjamin
Ring Thomas J.
Ring Thomas J.
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