BUTTERFLY VALVE CONTROL SYSTEM
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A low power consumption butterfly valve control system to be located in the ducting between a vacuum box and a blower in an air system of a sheet feeding apparatus in order to reduce the average power drawn by solenoids is disclosed. The butterfly valve control system includes an over center torsion spring and two small tubular solenoids adapted to actuate the butterfly valve by each being pulsed only long enough to initiate movement to the butterfly valve to overcome the over center force exerted by the torsion spring. This control system reduces power requirements for the solenoids from 11.5 watts of a conventional system to 0.4 watts.