Abstract: For producing readings representative of the position of a fluid-powered actuator, a magnetic position-sensing system is used which is out of contact with the actuator's ram and is completely united with the actuator's cylinder. The sensing system has a periodic magnetic field pattern of the ram itself and a number of magnetic field detectors placed in an end plate of the actuator clear of the ram's outer face. The true position of the ram within one period of the magnetization pattern is measured by electrical interpolation based on output signals of the different magnetic field detectors.

Abstract: The invention deals with a gripping mechanism which is pivotable about an axis having a horizontal component, in particular a welding tong, with gripping members which can be moved toward one another, between which a workpiece can be clamped, and with a clamping drive, which is supplied with energy from an energy source and produces relative movement between the gripping members. An angle indicator determines the angular position of the gripping mechanism with respect to a vertical reference and a modulator responsive to an output signal of the angle indicator is connected between the energy source and the clamping drive and regulates the energy supplied to the clamping drive in dependence on the position of the gripping mechanism with respect to the vertical reference, so that the gripping members are held closed with a clamping force which is dependent in a predetermined manner on such angular position.

Abstract: A solenoid valve having a valve body and a magnetic head with a chamber arranged between a pair of magnetic cores. A movable armature is provided in the chamber and has a sealing member movable therewith between open and closed positions relative to a passageway through one of the magnet cores. A spring is provided for biassing the armature and, accordingly, the associated sealing member toward one of the two positions thereof. The force of the magnetic field generated by the electrically energizable magnetic coil encircling the magnet cores is greater than the return force of the return spring.

Abstract: A pneumatically operated grinding apparatus having a dust removal structure. The grinding apparatus has a housing and a movable work plate which is driven by a compressed-air motor. An inlet piping connection is provided for compressed air and is connected in fluid circuit with an inlet opening of the compressed-air motor. A suction piping connection is also provided which is connected to the inside of the housing and to which a suction device can be connected. A discharge-air piping connection is provided which is connected to an outlet of the compressed-air motor and is guided outwardly from the housing.

Abstract: A multiway valve having a housing with an axially movable main valve body reciprocally mounted therein between first and second positions. The main valve body is received in a main valve chamber and a control valve chamber. A flexible and axially movable diaphragm is connected to and extends between the housing and the main valve body to block the communication between the main valve chamber and the control valve chamber. The housing has a working port and a main vent bore therein communicating with each other past a valve seating structure on the housing and the main housing valve body which controls communication therebetween in response to movements of the main valve body between the first and second positions. One side of the diaphragm is in communication with the main vent bore at all times. A passageway is provided in the housing and a valve is disposed in the passageway for controlling the supply of pressurized fluid to the control valve chamber.

Abstract: A valve arrangement having a housing with an inlet for pressurized fluid and an outlet. A chamber is provided in the housing having a flexible diaphragm therein dividing the chamber into a control chamber and a pressure chamber. The pressure chamber and the control chamber are each connected in fluid circuit with the pressurized fluid supplied to the inlet through a constant cross section throttle opening. An analogue pressure regulator is provided for maintaining the pressure of the pressurized fluid in the control chamber constant independent of pressure variations in the pressure of the pressurized fluid. The analogue pressure regulator includes a control opening providing fluid communication from the control chamber to the outlet and a pivotally supported armature movable into and out of blocking relation with the control opening.

Abstract: An apparatus for processing short lengthed, elongate waste timber workpieces to usable timber beams of relatively long length includes a cutter device for cutting wedge-shaped tenons into the ends of the elongate workpieces, a gluing device for applying a thin coating of glue to the cut tenons on each end of each workpiece, and a press device for pressing the workpieces together such that the cut tenon ends of each workpiece is glued to the cut tenon ends of another workpiece to form a timber beam. A length-cutting device can be used to cut the timber beam into the appropriate lengths as desired.

Abstract: A system for connecting and locking a collector bowl to a connecting housing attached to an air conditioning device. The collector bowl, near its open end, is provided with radially outwardly extending multiple counter-lugs, and the connecting housing, near its open end, is provided with inwardly extending multiple lugs. When the open end of the collector bowl is fitted within the open end of the connecting housing, the counter-lugs are moved past the lugs due to the (discontinuity) areas therebetween and the collector bowl is twisted to produce a connecting engagement between the lugs and the counter-lugs. Snap projections on the collector bowl or spring-load latching parts on the connecting housing, appropriately located, can function to lock the collector bowl to the connecting housing by preventing disengagement of the lugs and counter lugs.