Abstract: Techniques are disclosed for systems and methods to reduce mechanical vibrations within a cryocooler/refrigeration system configured to provide cryogenic and/or general cooling of a device or sensor system. A cryocooler includes a motor driver controller configured to receive operational parameters and generate motor driver control signals and/or balancer system control signals based, at least in part, on the received operational parameters, and a motor driver configured to receive the control signals and generate drive signals to drive a motor and/or a balancer system of the cryocooler. The cryocooler includes a motorized and/or actively balanced expander configured to drive and/or balance motion of a displacer of the expander. The expander includes a magnet ring fixed to the displacer and a motor coil disposed within a cylinder head of the motorized and/or actively balanced expander.

Abstract: A transmission housing includes a profile body configured to enclose transmission components, two side walls configured to enclose the transmission components in the profile body, and a hub rail inserted into a recess of one of the two side walls and fastened to the one of the two side walls, The hub rail includes at least two hubs and is defined by a hub width which is higher than a wall thickness of each of the two side wails. The profile body, the two side walls and the hub rail are each configured without joints in a radial direction of the at least two hubs in order to prevent radial insertion of a one of the transmission components into the hubs.

Abstract: Techniques are disclosed for systems and methods using microelectromechanical systems MEMS techniques to provide cryogenic and/or general cooling of a device or sensor system. In one embodiment, a system includes a compressor assembly and MEMS expander assembly in fluid communication with the compressor assembly via a gas transfer line configured to physically separate and thermally decouple the MEMS expander assembly from the compressor assembly. The MEMS expander assembly includes a plurality of expander cells each including a MEMS displacer, a cell regenerator, and an expansion volume disposed between the MEMS displacer and the cell regenerator, and the plurality of cell regenerators are configured to combine to form a contiguous shared regenerator for the MEMS expander assembly.

Abstract: Techniques are disclosed for systems and methods using microelectromechanical systems MEMS techniques to provide cryogenic and/or general cooling of a device or sensor system. In one embodiment, a system includes a compressor assembly and MEMS expander assembly in fluid communication with the compressor assembly via a gas transfer line configured to physically separate and thermally decouple the MEMS expander assembly from the compressor assembly. The MEMS expander assembly includes a plurality of expander cells each including a MEMS displacer, a cell regenerator, and an expansion volume disposed between the MEMS displacer and the cell regenerator, and the plurality of cell regenerators are configured to combine to form a contiguous shared regenerator for the MEMS expander assembly.

Abstract: Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer.

Abstract: A sliding door lock system comprising a sliding door lock mechanism having a top plate which is fixed to a door frame via two flaps, each comprising a bolt receiving element for fixing the sliding door lock mechanism to the door frame using a fixing element, said top plate being shifted with respect to the door frame so that a cavity is formed, limited by side walls extending between the shifted part of the top plate and the flaps, said sliding door lock system comprising a reinforcement element which is disposed on at least one of the flaps and next to at least one of the side walls, wherein a support wall of the reinforcement element is adapted to support the adjacent side wall of the sliding door lock mechanism so that an outward deformation or a bending can be prevented.

Abstract: Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer.

Abstract: Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer.

Abstract: A sliding door lock system comprising a sliding door lock mechanism having a top plate which is fixed to a door frame via two flaps, each comprising a bolt receiving element for fixing the sliding door lock mechanism to the door frame using a fixing element, said top plate being shifted with respect to the door frame so that a cavity is formed, limited by side walls extending between the shifted part of the top plate and the flaps, said sliding door lock system comprising a reinforcement element which is disposed on at least one of the flaps and next to at least one of the side walls, wherein a support wall of the reinforcement element is adapted to support the adjacent side wall of the sliding door lock mechanism so that an outward deformation or a bending can be prevented.

Abstract: Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer.

Abstract: Methods for assembling a reciprocating body, such as a piston, within a bore using a design are described. The piston is substantially centered within the bore and then connected at one end through a rotational coupling to a substantially laterally fixed structure connected to the bore such that during normal operation the piston can rotate within the bore along the bore axis of symmetry but can no longer move laterally. Before fixing the rotational coupling, the piston is connected to an external gas source and substantially aligned along the bore axis of symmetry by a gas bearing having one or more gas bearing ports disposed toward the bore. During normal operation, the gas bearing provides a rotational force sufficient to realize a non-frictional bearing between the piston and the bore.

Abstract: A method and a device are provided for determining a content of at least one foreign substance in a matrix of a solid or liquid food. At least one reagent area for providing at least one reagent has a receptacle for a replaceable reagent container for replaceably connecting a sample container including at least the matrix; a transfer line is provided between the reagent area and the reaction area, by which the at least one reagent can be fed to the reaction area; a sensor area is provided for demonstrating the foreign substance released from the matrix; a carrier gas line is provided between the reaction area and the sensor area, by which the released foreign substance can be fed to the sensor area; and an output line is provided through which the dissolved foreign substance can be fed outward from the sensor area.

Abstract: Methods for assembling a reciprocating body, such as a piston, within a bore using a design are described. The piston is substantially centered within the bore and then connected at one end through a rotational coupling to a substantially laterally fixed structure connected to the bore such that during normal operation the piston can rotate within the bore along the bore axis of symmetry but can no longer move laterally. Before fixing the rotational coupling, the piston is connected to an external gas source and substantially aligned along the bore axis of symmetry by a gas bearing having one or more gas bearing ports disposed toward the bore. During normal operation, the gas bearing provides a rotational force sufficient to realize a non-frictional bearing between the piston and the bore.

Abstract: A heat exchanger assembly for transferring heat across a wall of a housing is disclosed. The assembly comprises an outer heat exchanger having an outer ring disposed outside the housing and having an interior surface in contact with an exterior surface of the wall; an inner support disposed inside the housing and having an exterior surface; and a plurality of inner heat fins connecting the exterior surface of the inner support to an interior surface of the wall of the housing.

Abstract: A drive for the piston of a linear cooler includes a magnet (6), a linear oscillation coil (3) and a power supply for the coil (3) with a flexible section of line (11) running from a fixed support component (1) to the oscillating coil (3). To increase its life-time, the line section (11) is either made from a bent strip of metal, preferably copper or a copper alloy, or from three components, a metal core, an insulating sheath surround the metal core and a support spring surrounding said sheath.

Abstract: An apparatus for determining a component present in a liquid sample in free state or bound to constituents, preferably for measuring the SO2 content in the sample, has a locating space for the liquid sample, a sensor preferably responding selectively to the component, preferably based on an electrochemical cell, and a gas piping system via which a carrier gas can be passed from the locating space through the sensor (FIG. 1).