Abstract: A multistep reduction-gear attachment for multipurpose electric motors. Its casing-like gear box, whcih can be attached to a collar that surrounds the shaft of the motor and is intended for securing accessories, accommodates two axially parallel belt wheels or toothed wheels. One wheel is screwed onto the motor shaft, which engages inside the the gear box when the motor is in operation. The other wheel is screwed onto a drill spindle that is inserted into the gear box from the opposite side. To reduce manufacturing costs and simplify mounting accessories, the gear box (2) consist of two angled components (3), each flank (5) of which has at the end a chuck (6) for the collar (8) of the electric motor (1) or for the drill spindle (9) and which are secured together with means (4 & 13) of attachment that can be loosened in such a way that the components can move toward each other along said flank and the angled components, the belt wheels, and the wall plates (14) are similar to each other in shape.

Abstract: A fluid flow controller comprises a casing and includes a valve that is actuatable by either a diaphragm or a piston. Diaphragm actuation is provided by a diaphragm held by a retainer, the retainer being axially moveable within the casing in response to fluid pressure on the diaphragm. Piston actuation is provided by (i) the retainer and (ii) sealing means at the periphery of the retainer for providing fluid tight engagement between the casing and the retainer. With either diaphragm or piston actuation, even if the diaphragm ruptures, substantially no fluid can bypass the retainer, and the flow controller continues to function. A relief valve prevents rupture of the diaphragm if the fluid pressure exceeds a predetermined valve.

Abstract: A valve core or insides for a valve device, said core being made primarily of plastic such that its manufacturing costs are considerably reduced, the core being specially configured to allow for substantial air flow through the core while insuring good dynamic sealing.

Abstract: A valve including annular valve seats, made of a resilient material such as rubber, fitted in respective valve seat retainers provided in the peripheral portions of fluid passages in the valve body. A gate is slidingly moved to open or close the valve, with its wall surface being maintained in contact with each valve seat. Each of said annular valve seats are brought into close contact with the wall of the gate when the gate is moved to a closed position to provide sealing therebetween. In addition, the valve comprises a fluid passage provided in the gate which serves to decrease the pressure of the fluid acting on the valve seat on the upstream side at the initial stage of the movement of the gate from the closed position to the open position, whereby the valve seat is biased from the gate.

Abstract: A compact inexpensive dryer unit for photographic processors which includes a liquid removing squeegee unit, transport rollers and guiding means for moving photographic sheet material through the drying area, a pair of opposed tapered air distribution manifolds to uniformly distribute warm drying air against both sides of the sheet material in close proximity thereto as it travels through the dryer with provision for recirculating substantial portions of the warmed air after it travels through the drying area of the unit, one of said manifolds being hinged to facilitate access to said drying area for servicing.

Abstract: A valve with a pair of valve plates includes a valve-plate actuating mechanism operably connected between the valve plates and a valve shaft for transforming the movement of the valve shaft to the movement of the valve plates such that the latter are pivotably movable about the axis of the valve shaft and displaceable along an axis perpendicular to the axis of the valve shaft.

Abstract: A high-pressure butterfly valve having pressure enhanced sealing which comprises a valve body defined by a pair of interfitting body plates that are retained in assembly by bolts that also secure the valve mechanism into a flow line. The interfitting valve plates also cooperate to define a seal recess within which is received an annular sealing element that provides a peripheral seal about a butterfly disc that is rotatably supported within a flow passage defined by the valve body plates. The annular sealing element also includes a pressure-responsive portion that is energized by pressure upstream of the butterfly element and which is directly responsive to pressure to urge the sealing portion thereof into sealing engagement with the periphery of the butterfly element.