Silencer for electric motion picture screens

Claim 1

A silencer for motorized projection screens whereby the screen fabric may be shifted into and out of its case, the device comprising a motor tube, picture screen roller tube axially positioned therein in spaced relationship, said tube having an inner longitudinal seam and an opposed longitudinal, inverted, V-like screen fabric attaching groove, an outer casing, said screen roller tube axially positioned in said casing in spaced relationship thereto, a reversible motor in said motor tube, electrical means to energize the motor, in combination with a cylindrical rubber silencer member anchored to the motor shaft, having a diameter substantially equal to the inner diameter of said roller tube and provided with opposed grooves for seating around said seam of said roller tube and the opposed, inverted, V-like screen fabric attachment groove for rotating the screen roller tube, a rotatable plastic collar on the end opposite the rubber member having circumferential marginal flanges, a second cylindrical rubber member on said collar having opposed grooves for seating around said roller screen seam and the opposed, inverted, V-like groove, a third rubber member seated in the end of said roller screen and anchored thereto and having opposed grooves for seating around the said seam and inverted, V-like groove, respectively, a pin anchored in and extending outwardly of said bearing, a stationary fourth rubber means provided with an axial cylindrical bearing for seating the extending portion, and means to close the ends of said casing, whereby, upon energization of the motor, the first rubber member will silently rotate the screen roller tube along with the second rotatable rubber member and about the pin in its bearing.