Abstract: An adjustable can opener that includes a space adjustment assembly disposed between a main body and a washer set is provided. The space adjustment assembly includes a retaining base coupled to the main body and an adjustment shifting block fitted on the retaining base. The retaining base has a stepped portion having multiple steps. The adjustment shifting block also has a stepped portion having multiple steps. Responsive to manual rotation of the adjustment shifting block, the position where one of the steps of the adjustment shifting block is in contact with a respective one of the steps of the retaining base is changed to adjust the space between a traction wheel and a cutter wheel of the can opener.

Abstract: An apparatus is provided for modifying the geometry of at least one part of a turbine, which can include a shell assembly that includes an outer shell that is shaped to modify the shape of a pre-existing element of a turbine. The outer shell of the shell assembly can be composed of a fiber-reinforced polymeric material and can at least partially define an inner cavity. The outer shell can be bonded to a structure to modify the geometrical shape of that structure. Thereafter, a polymer casting can be injected into the inner cavity via at least one injection port attached to the shell assembly. In some embodiments, one or more stiffeners and/or a core can be positioned within the inner cavity to help improve the bonding of the polymer casting to the shell and/or improve a structural property of the apparatus.

Abstract: A method is provided for monitoring and/or analysis of electrical machines during operation. An electrical machine has at least one generator with a shaft, an exciter system and drive device that drives the shaft. In this case, a first signal, which describes a voltage across a rotor winding, and a second signal, which describes a current flowing through the rotor winding, are measured simultaneously. The two signals are supplied to an analysis unit. The signals are split into individual frequency components in the analysis unit. The impedance of the rotor winding is then determined in order to identify fault states in the electrical machine.

Abstract: A method of predicting the occurrence of a wind gust at a wind turbine is described. The values of at least one parameter measured for the wind turbine as input data are obtained on a predetermined frequency. A group of input data of predetermined size that was most recently obtained is selected. The probability of the occurrence of a wind gust is calculated based on the selected group of input data. The calculated probability that a wind gust will occur is verified to be above a predetermined probability level. And the occurrence of the wind gust is predicted.

Abstract: A device for impregnating an insulation of a winding bar of an electric machine includes a container accommodating the winding rod and connected to a tank containing an impregnation agent. The container, which remains open during the impregnation process, is surrounded by an evacuation container to create a negative pressure within the container. To achieve a more rapid penetration of the impregnation agent and to simplify the overall process, a vacuum-tight sleeve acts as the container, the sleeve being encompassed by a pressure-resistant sleeve, and a conduit of an assembly that generates a vacuum leads into the interior of the sleeve. The impregnation agent is supplied with a pressure that is lower than the prevailing pressure in the pressure-resistant sleeve. The container can be a multi-part tool defining an interior for surrounding and accommodating the winding bar in a positive fit at least during an evacuation and impregnation process.

Abstract: A membrane seal includes a pair of confronting annular sealing grooves. A first annular sealing member is received in one of the oppositely facing sealing grooves and a second annular sealing member is received in the other of the oppositely facing sealing grooves. The first and second sealing members are sealably connected together by an annular membrane. A pressure difference across the membrane forces the first and second sealing members into contact with a side wall of each of the oppositely facing sealing grooves to effect a seal. Known sealing members have a circular cross-section but in the present invention at least one of them has an oval cross-section. The oval cross-section gives the first and/or second sealing member(s) a larger zone of contact with the oppositely facing sealing groove(s). This reduces the amount of wear on the first and/or second sealing member(s) and produces a better seal.

Abstract: A can opener has a shaft for effecting rotation of a traction wheel for moving a can relative to a cutting wheel to sever an upper annular lateral side of the can, and is equipped with an adjustment element, which is screwed onto a threaded outward end portion of the shaft, and which has two wing portions in contact with corresponding sloping portions of a hexagonal member so that when the shaft is turned together with a rotary lever in the cutting direction, the hexagonal member is first turned relative to the adjustment element for a small angle for the higher portions of the sloping portions to be pressed against the wing portions to cause reduction to the space between the traction wheel and the cutting wheel; thus, the wheels can clip an annular wall of a end cover of a can in between.

Abstract: A method is for protecting a DC generator against overvoltage in the event of a loss of load. A voltage limit value is defined and, when starting the current generator, one or a few small current pulses are generated during an initial phase. The voltage is measured across the output of the current generator during the initial phase and the voltages measured across the output of the current generator are compared with the voltage limit value. There is a changeover to normal operation only if all the voltages across the output of the current generator measured during the initial phase are below the voltage limit value. The current generation is interrupted and a loss of load is indicated if any one of the voltages across the output of the current generator measured during the initial phase exceeds the voltage limit value.

Abstract: A trackside power distribution apparatus includes overlapping feeders. A first signal supply unit has an input adapted to receive power from a first electrical power source and an output for supply of power to a feeder. A first portion of feeder is connected to the output of the first signal supply unit and extends alongside a track to a unit requiring power. A second signal supply unit has an input adapted to receive power from a second electrical power source and an output for supply of power to a feeder. A second portion of feeder is connected to the output of the second signal supply unit and extends alongside the track to the unit requiring power. A selection apparatus is also provided which selects which feeder portion is used to supply power to the unit. The provision of the two feeder portions improves the reliability of the apparatus in the event that one power source fails.

Abstract: A can opener includes a first lever, and a second lever pivotally connected to the first lever. The levers are in laid down position when a cutting wheel of the can opener is cutting a can. The first lever is equipped with a first wheel having domed protrusions spaced around the center. The second lever is equipped with a second wheel having main round recesses spaced around the center. Smaller round recesses and curved trenches are formed between the main recesses; the curved trenches are similar to annular trenches provided on trust block seating of thrust ball bearings. The first, and the second wheels are disposed face to face so as to help prevent change of position of the pivotal axis of the levers in the course of one of the levers moving relative to the other, helping the can opener operated with precision.

Abstract: For supporting the cooling of an air-cooled gas turbine set, it is proposed to arrange, in the cooling air ducts of the cooling system, means for increasing the pressure of the flowing cooling air. In an embodiment, the cooling system (17) is supplied with high pressure compressor air from the end stages of the compressor (1) of a gas turbine set (1, 2, 3, 4). This cooling system branches into a first branch (18), by means of which the combustor (2) and the first stages, particularly the first guide blade row of the turbine (3), are cooled. A second branch (19) conducts cooling air to the further turbine stages. An ejector (20) is provided for increasing, as needed, the pressure drop available by means of the first branch (18) of the cooling system. Its ejector nozzle (22) is supplied with live steam (9) taken from a waste heat steam generator (51), the live steam supply being adjustable by means of an adjusting member (21).

Abstract: A protection and control system incorporates status acquisition apparatus for use in monitoring the status of a device in the protection and control system, such as a protection relay in a high voltage electrical circuit. The status acquisition apparatus comprises a conversion circuit which converts an input voltage to a pulse width modulated signal and a comparison circuit which monitors the pulse width modulated signal to determine the status of the device. The mark-space ratio of the pulse width modulated signal decreases as the input voltage is increased to minimize power dissipation over a range of input voltages. The status acquisition apparatus may form an integral part of a protective switching device, although other applications are envisaged.

Abstract: A power-factor correction arrangement incorporates an active inductance source and a passive capacitance source switchably connected in parallel across a source of AC power. The active and passive sources are directly interconnected at their switched ends by a resistance, the value of which is chosen so that, when the passive source is switched into circuit while the active source is already connected to the AC source, the current through the passive source suffers virtually no surge.

Abstract: There are provided an induction heating coil for carrying out high frequency induction heating (heating during movement) of a hot rolled steel or the like by surrounding the hot rolled steel or the like which is placed on a plurality of conveying rollers and conveyed, and an induction heating apparatus using this induction heating coil. In an induction heating coil 2 for induction heating a heated body (a thin slab 8 or the like) by surrounding it, a first coil portion 13 wound in a spiral form while transferring in one direction (the direction of the arrow mark &agr;) along a coil axis S and a second coil portion 14 which is connected to a terminal (turn point 18) of the first coil portion 13 and wound back while transferring in the other direction (the direction of the arrow mark &bgr;) along the coil axis S are combined so as to overlap in the non-contact state.

Abstract: A device which suspends a horizontal heat-exchanger tube from a vertical supporting tube, including a flat section member adapted to be welded to an outside wall of the vertical supporting tube and parallel to an axis thereof, the flat section member being provided with a rounded notch which receives a support piece adapted to accommodate the horizontal tube, wherein the tube-receiving support piece is a folded metal sheet that is folded to match a shape of the notch and adapted to surround a portion of an outside periphery of the tube, the support piece having a top end and a bottom end, each of the ends being folded over towards the flat section member so as to be welded thereto, and wherein a collar adapted to enclose the horizontal tube is fixed against the tube-receiving support piece.

Abstract: A hybrid card reader for IC cards/magnetic cards includes a casing consisting of an upper casing and a lower casing defining a card passage therebetween. A reduction gear train is mounted on the upper casing and driven by a motor mounted in the casing for driving a roller. Two parallel walls are mounted on the lower casing and include aligned slots defined therein. An idle wheel is mounted to face the roller to sandwich a card therebetween. A fixing member is swivelably mounted to the casing for supporting a magnetic head. A frame is slidably guided by the slots of the parallel walls for contacting with an IC on the card. The idle wheel contacts with the roller under the action of a spring wire when the card is not inserted into the card passage. When the card is inserted into the card passage, the card is sandwiched between the idle wheel and the roller and conveyed under rolling friction upon rotation of the roller.