Patent ID: 6064797
Filing Date: 2000-05-16
Classification: A61M,F04B

Abstract:
A rotation control for a device to be rotated comprising:a. a variable speed DC motor having a constant rotational speed upon receiving a selected fixed voltage electrical input power;b. an adjustable electrical input power supply connected to said motor for supplying selectably said selected fixed voltage;c. a switch circuit connected between said motor and said power supply activatable in response to a first electrical signal to turn said motor ""on"" and activatable in response to a second electrical signal to turn said motor ""off"";d. a selectable frequency, regular interval electrical signal device connected to said switch circuit to provide a series of said first electrical signals at regular timed intervals to activate said switch circuit to turn said motor ""on"";e. an encoder wheel coupled to said device to be rotated and to said motor for rotation of said encoder wheel at a speed proportional to said constant rotational speed of said motor, said encoder wheel having a plurality of openings around said encoder wheel with predetermined varied spacing there between, said spacing corresponding to a desired amount of device rotation during that part of the rotation of said encoder wheel; andf. a light sensor operatively positioned adjacent said encoder wheel for detecting said spaced openings and connected to said switch circuit to provide second electrical signals to turn said motor off when a subsequent one of said openings is detected by said sensor thereby allowing said device to traverse said desired amount of device rotation between said spaced-apart opening during said regular timed intervals.