Abstract: A switchgear installation has a cubicle with a door to provide access thereinto, and a low voltage circuit breaker is mounted therein and accessible through the door. Coupled to the circuit breaker is a logic module, and a portable user interface module is releasably mounted on the exterior of the cubicle and operatively connected to the logic module to display information concerning the operation of the breaker and to provide an interface for the user to interact with the logic module and thereby with the breaker. The user interface module includes a battery providing the required power for setting and monitoring the functions of the breaker.

Abstract: A method, machine system and thread cutting device for producing a threaded projection on a plate-shaped workpiece and in particular on a sheet-metal workpiece. A workpiece lug (2) is cut with a threaded contour in the principal plane of the workpiece and at least a section of the workpiece lug (2) featuring at least one threaded contour (5, 6) is permanently bent in the form of a threaded projection extending at the desired angle relative to the principal plane of the workpiece. A machine system (9) for implementing the method encompasses a cutting device for the relief cutting of workpiece lugs (2) as well as a thread cutting device. Also included is a bending device (15) by means of which at least a section of the workpiece lug (2) provided with at least one threaded contour (5, 6) can be permanently bent relative to the principal plane of the workpiece. A thread cutting device of the machine system (9) is appropriately configured for that purpose.

Abstract: A machine for cutting plate-shaped workpieces, incorporates a tool guide (7), an operating handle (13), and a cutting tool (6) which revolves along the tool guide (7). By moving the operating handle (13), the tool guide (7) with its cutting tool (6) can be shifted from an idle position into an active position. In its idle position the cutting tool (6) is disengaged from, and, in its active position it is engaged in, the workpiece to be processed. Provided between the operating handle (13) and the tool guide (7) is a variable ratio transmission mechanism (14, 18) with a transmission ratio which varies with the movement of the operating handle (13) as a function of the position of the tool guide (7) and its cutting tool (6) relative to the workpiece.

Abstract: A blow molded synthetic resin container having a body of generally V-shaped cross section defined by a pair of V-shaped side walls, end walls extending therebetween, and a bottom wall. A cylindrical neck is open at its upper end, and an upwardly inclined shoulder extends between the upper ends of the side and end walls and the lower end of the neck. One of the side walls has a pair of wall portions which converge inwardly of the body towards the center axis of the body and the other of the side walls has wall portions which converge outwardly from the axis of the body. The other panel has a recess therein for a label.

Abstract: A machine for the multi-stroke, continuous slotting of plate-shaped workpieces and especially sheet metal plates is described. A slotting tool (16) and the workpiece are movable in a forward direction relative to each other in a gate-cutting function and in at least one subsequent slot cutting stroke. This is followed by a return movement in the opposite direction (32) over a return length (A) that corresponds at a maximum to the length of the previously laterally cut slot. This is followed by a cross-cutting stroke in which the strip of material (31) that was laterally cut in the gate-cutting function and the minimum of one subsequent slotting stroke is severed at a distance from the point of its connection to the remaining workpiece. The slotting tool (16) is driven by a cam drive with a drive control, a return-drive system with a return-drive control and a forward-feed drive system with a feed-drive control.

Abstract: A method and device for determining the length (b) of at least one of two legs (13, 14), of a workpiece (12) bent toward each other at a bending angle (?) requires location of the workpiece (12) in a defined position. The position of the bending angle vertex (S) and the position of the end (E) of the leg (13, 14) to be measured are determined. Based on the position of the bending angle vertex (S) and of the end (E), the length (b) is calculated as the distance between the bending angle vertex (S) and the end (E). The measuring apparatus includes a system serving to determine the position of the bending angle vertex (S), a unit serving to determine the position of the end (E) and an evaluation unit which, based on the position of the bending angle vertex (S) and of the end (E), calculates the length (b) as the distance between the bending angle vertex (S) and the end (E).

Abstract: A method and machine for the multi-stroke, continuous slotting of plate-shaped workpieces and especially sheet metal plates are described. As part of a method for the continuous multi-stroke slotting of plate-shaped workpieces, a slotting tool (16) and the workpiece are moved in an advance direction relative to each other in a gate-cutting function and is at least one subsequent slot cutting stroke. This is followed by a return movement in the opposite direction (32) over a return length (A) that corresponds at a maximum to the length of the previously laterally cut slot. This is followed by a cross-cutting stroke in which the strip of material (31) that was laterally cut in the gate-cutting function and the minimum of one subsequent slotting stroke is severed at a distance from the point of its connection to the remaining workpiece.

Abstract: A tool for machining workpieces by motion of the machining tool relative to the workpiece has a support extending in the X-axis over a work support table and movable in the Y-axis. A machining tool housing is movable on the support in the Y-axis. A portion of the housing containing the machining tool is movable with respect to the mounted portion in the Y-axis within a limited range of motion. A computer control effects operation of drive motors to move the housing along the support and the support along the machining tool table to machine a workpiece supported on said worktable in X and Y axes, and the computer control can also effect operation of another drive motor to rapidly move of the housing portion and machining tool in the Y-axis when the desired length of motion in the Y-axis is within its range of motion.

Abstract: A skimmer guard has first and second brackets configured to bear against opposite walls of a skimmer passageway, and a plurality of resiliently deflectable ribs extending between the first and second brackets for blocking objects from passing into the skimmer. The ribs are configured and dimensioned to bias the first and second brackets against the second wall of the skimmer passageway to hold guard in a fixed position.

Abstract: A four stroke engine including a crankshaft. A power piston within a first cylinder connected to the crankshaft such that the power piston reciprocates through a power stroke and an exhaust stroke. A compression piston within a second cylinder is connected to the crankshaft such that the compression piston reciprocates through an intake stroke and a compression stroke. A gas passage interconnects the first and second cylinders and includes an inlet valve and an outlet valve defining a pressure chamber therebetween. An inlet manifold is in fluid communication with an inlet valve of the second cylinder. A bypass valve is in fluid communication with the second cylinder and the inlet manifold, wherein during a compression stroke the bypass valve allows a portion of the air to bypass the inlet valve and exhaust into the inlet manifold to provide a variable compression ratio.

Abstract: A photoelectric conversion element comprising a substrate and a light sensor disposed on a surface of the substrate and receiving high speed optical pulse signals and converting them into high frequency waves in which the light sensor comprises at least carbon nano-tubes, as well as a photoelectric conversion device having the element, for directly converting high speed optical pulses signals in a communication band into signals of high frequency waves or electromagnetic waves.

Abstract: A spiral-type guide member having a spiral channel extending about an open center portion is provided adjacent the gas inlet end of the laser discharge tube of a gas laser assembly. This guides the entering gas stream about the periphery of the laser discharge tube to improve the distribution of the power of the laser beam over the cross section of the laser discharge tube to the discharge tube of the laser beam 113 is provided for the laser gas in the feed line 123, through which at least part of the laser gas is fed to the laser-discharge tube 103.

Abstract: A machine tool having a C-shaped frame has a workpiece processing station adjacent the open end of the throat, and an elongated guide rail extends in a first axis perpendicularly to the throat. A carrier extends along the guide rail, and a multiplicity of guide units are spaced along and movable on the carrier in the first axis. Workpiece clamping units are carried by the guide units, and drive means moves the guide units on the carrier. The guide rail is movable in the throat along a second axis perpendicular to the first axis, and a second carrier supported on the frame extends in a second axis parallel to the throat. A multiplicity of guide elements is spaced along and movable on the second carrier and supports the guide rail for movement in the second axis of the second guide rail.

Abstract: A four stroke cycle internal combustion engine including a crankshaft, rotating about a crankshaft axis of the engine. A power piston is slidably received within a first cylinder and operatively connected to the crankshaft such that the power piston reciprocates through a power stroke and an exhaust stroke of a four stroke cycle during a single rotation of the crankshaft. A compression piston is slidably received within a second cylinder and operatively connected to the crankshaft such that the compression piston reciprocates through an intake stroke and a compression stroke of the same four stroke cycle during the same rotation of the crankshaft. The power piston reciprocates along a first piston-cylinder axis which is offset from the crankshaft axis. The offset substantially aligns a point of maximum combustion pressure applied to the power piston with a point of maximum torque applied to the crankshaft during the power stroke.

Abstract: A gas laser includes a control to modify the distribution of the intensity of the laser light over the laser beam cross section produced in the lasing gas within at least one laser tube by at least two electrodes and a voltage supply unit by means of which a voltage can be fed to electrodes. A discharge area forms in the lasing gas and this can be affected by adjusting the amplification profile of the laser over the excitation cross section of the laser tube.