Abstract: A pneumatic mechanism for the application of uniform pressure to a mechanically adjustable spindle. The mechanism includes a support shelf with a double-acting piston attached at its non-pressure end to the support shaft. A cylinder receives the piston for telescopingly sliding movement of the piston relative to the cylinder. A lifting stop rod is connected to the pressure end of the piston and an externally threaded tube engages the pressure end of the piston and telescopingly receives the lifting stop rod. A worm wheel engages the threaded tube and a worm gear engages the worm wheel. A hand wheel is connected to the worm gear for rotating the worm gear and the worm wheel. An adjustable connection is provided between the lifting stop rod and the threaded tube permitting limited stop movement of the lifting stop rod by the piston relative to the threaded tube.

Abstract: A pneumatic mechanism for incrementally adjusting a glass sheet washing machine of the type having upper and lower sets of brushes and rollers spaced apart vertically to wash sheets of glass of various thicknesses passing between the sets. The upper set of brushes and rollers is carried by an upper frame member and the lower set of brushes and rollers is carried by a lower frame member. The pneumatic mechanism includes a pair of stacked pneumatic cylinders arranged in lifting engagement with the upper frame member at each corner of the upper frame. A selector is provided to sequentially actuate one and then the other of the pneumatic cylinders in a stack to extend their piston rods which are of different lengths to raise the upper frame relative to the lower frame by incremental distances defined by the extended lengths of the respective piston rods.

Abstract: A yieldable gripper unit for a conveyor of the type in which the gripper units form two endless tracks which converge to engage and support a sheet of material clamped between them. The gripper units of the endless tracks move on rails mounted on tubular supports. One of the endless conveyor tracks is equipped with non-yielding gripper units and the other is equipped with yieldable gripper units. Each yieldable gripper unit includes a generally rectangular base plate having one side facing the sheet of material which is to be clamped and the other side facing its tubular supports. A yieldable arm is cantileverly attached to the base plate and is inclined at an acute angle relative to its base plate on the sheet material side thereof to permit the arm to yield towards the base plate when the sheet of material is clamped. A plurality of rubber buttons are mounted on the yieldable arm and are positioned to engage the sheet of material which is to be clamped by the gripper unit.