Abstract: A pressurized natural gas flow, from which CO.sub.2 and H.sub.2 O are first removed using an adsorptive separation device, is subjected to liquefaction. The pre-purified natural gas flow is brought into heat exchange with at least one refrigerant routed in a refrigeration circuit and liquefied. The adsorptive separation device is regenerated by means of a regeneration gas containing a partial flow of the pre-purified natural gas flow and optionally additional residual gas flows such as a flash gas flow. During the cooling and liquefaction process of the natural gas flow at least the partial natural gas flow needed-for regeneration of the adsorptive separation device is separated when the temperature of the partial flow is such that the efficiency of cold use can be maximized by throttling to the regeneration gas pressure.

Abstract: Apparatus for injection of compressed air into a liquid such as waste water comprises a tubular basic body surrounded by a flexible, perforated membrane through which compressed air is supplied through radial openings in the basic body to be dispersed by the perforated membrane as fine bubbles into the liquid. The basic body is connected to a compressed air supply pipe through a hollow connecting body that supports the basic body and supplies compressed air to radial openings in the basic body. In one embodiment, air-conducting passageways are arranged concentrically about the hollow connecting body. The hollow connecting body provides a flooding zone in communication with the tubular basic body and sealed from the air-conducting passageways. Liquid flows therethrough to avoid dead zones of untreated liquid. The common flooding zone provides a floodable volume relative to a non-floodable volume of greater than 1.3.

Abstract: An apparatus for injecting compressed air into a liquid comprises a tubular basic body such as a pipe that is surrounded by a perforated membrane through which air is distributed into wastewater and is connected to the nipple of a compressed air supply through a hollow and cylindrical member that transfers compressed air to the space between the membrane and the tubular basic body and also has a passageway for wastewater so that wastewater can flow through the tubular basic body, thereby avoiding stagnant areas of untreated wastewater.

Abstract: A method for repairing a hot-blast, long-time cupola furnace by removing residual slag and relining the cupola furnace including feeding liquid nitrogen to the cupola furnace immediately at the end of a smelting operation and simultaneously with the feeding of the liquid nitrogen, removing residual slag from the furnace. The furnace is cooled with liquid nitrogen until the furnace reaches a temperature of less than or equal to 40.degree. C. after which the furnace is relined with fresh refractory tamping compound.

Abstract: A method and device for the economic and environmentally safe disposal of waste material and molten slag from a cupola furnace comprises admixing the waste material with either molten slag or granulated slag so as to form a homogeneous mixture of the waste material in the slag material and thereafter feeding the mixture to a collection container.

Abstract: A method for the manufacturing of a metal core pc board which provides for manufacturing of two or three dimensional metal core pc boards of any form. The manufacturing of such pc boards can occur by injection molding, injection/compression methods or by a pressing method. High-heat resistant thermoplastics, as well as thermoset plastics are preferably used as pc board materials. A metal with good thermal conductibility is used for the core. The material is selected such that the thermal expansion coefficients of the metal core and the pc board material are optimally equal. The manufacturing contains the following steps: lamination of the metal plate with a plastic foil on one or both sides; placing of such prepared metal core in an injection molding tool; and thermoforming the plastic on the laminated core over the plastic foil.

Abstract: An adapter for converting a right angle grinder into a random orbital sander which employs a sanding pad assembly, the right angle grinder having a threaded output shaft, the adapter including a cylindrical body having a bearing aperture on its front side and a threaded bore for screwing onto the threaded output shaft on its back side, the axis of the threaded bore corresponding to the axis of the cylindrical body; a bearing assembly fitted into the bearing aperture so that as to establish a second axis of rotation that is parallel to but offset from the axis of the cylindrical body; an attachment for attaching the sanding pad assembly to the bearing assembly so that the sanding pad assembly can rotate freely about the second axis; a counterweight mounted on the front side of the cylindrical body so as to be located relative to measurement along the cylindrical axis at a position that is between the center of mass of the bearing assembly and the sanding pad assembly when the sanding pad assembly is connected

Abstract: The test-probe manipulator for a test probe for use with semiconductor wafers utilizes three adjusting spindles (50,51,52) arranged on the same side of the manipulator. The test-probe manipulator occupies little space and is easy to operate. All three axes of translational freedom perform linear motions independent of each other. Accuracy of adjustment is improved as compared to conventional devices. Easy placement on and removal from a test platform are ensured.

Abstract: A printed circuit board includes an injected molded substrate having a pattern recessed in the substance surface of interconnect traces, through-connections and connecting rods. A trench-shaped depression is provided in the substrate surface in the region of each interconnect trace, and a planar depression is provided in the substrate's surface in at least one of (a) the region of each through-connection and (b) the region of each contact surfacae. The pattern of recesses is covered with a conductive metal coat, and the depth of each planar depression is greater than the depth of each trench-shaped depression, so that the metal coat fills the trench-shaped depressions to the surface of the substrate, while in the planar depressions a distance remains between the metal coat and the surface of the substrate. A solder stop lacquer can then be applied such as by roller coating, without the necessity of photo-structuring and without filling the planar depressions.

Abstract: A switching device in a system of switching devices, which can be coupled to mountable switching, auxiliary switching, or signal devices. In the case of a cylindrical, manually operated part, disposed in the housing, having a selector, a coupling element pair comprising a jaw-shaped coupling element and a cone-shaped coupling element are provided on the cylindrical part in the direction of the switching axis on a mounting side, the pair of coupling elements being movable behind a housing slot, and being forced in engagement connection with each other and arranged in a housing slot on the surface of a device to be attached.

Abstract: A method for the manufacturing of a metal core pc board which provides for manufacturing of two or three dimensional metal core pc boards of any form with or without throughplating. The manufacturing of such pc boards can occur by injection molding, injection/compressing molding or by a pressing method. High-heat resistant thermoplastics, as well as duroplastics are preferably employed as pc board materials. A metal with good thermal conductibility is used for the core. The material is selected such that the thermal expansion coefficients of the metal core and the pc board material are optimally equal.

Abstract: A tubular discharge vessel for a compact low pressure discharge lamp, espally a compact fluorescent lamp, is formed by heating and bending a straight glass tube into a U-shape with a plurality of straight sections and a 180.degree.-bend. Adequate vessel wall thickness is assured at the tubular sections where the bends are formed, by first heating a central section, moving sections lateral to the central section axially toward one another, thereby compressing the heated central section and thickening its walls, and bending or rotating the lateral sections into a parallel orientation. This prevents the bending process from unduly thinning the vessel walls, leading to breakage or rupture under internal gas pressure.

Abstract: A physiological monitoring device receives a plurality of physiological measurements, including the user's diastolic and systolic blood pressure, pulse rate and body temperature. The physiological measurements are stored in a memory which is controlled by a microprocessor. The microprocessor organizes the measurements and causes the measurements to be displayed for analysis on a screen in either digital or graph form, printed in either digital or graph form and/or transmitted over a phone line or other communication link for reproduction in either digital or graph from at a distant receiver located, for example, in a doctors office or hospital.

Abstract: An adjustable potentiometer assembly provides tuning voltages for application to a varactor diode tuner in a television receiver. The assembly includes a substrate having distributive resistive elements formed thereon each with a tuning area at which the correct tuning voltage is established. The distributive resistive elements are formed in at least one row with the tuning areas aligned. In addition, the width or tuning range of the tuning areas for each channel are substantially equal.

Abstract: A tantalum capacitor comprising a cylindrical body and an axial tantalum anode wire. This wire is first folded and then soldered to an anode connection wire roughly parallel to a cathode connection wire which is itself soldered to the body of this capacitor. The connection wires include preferably a double right-angled section so that the distance between the outward portions of this wire correspond to predetermined standards.

Abstract: Thirty telephone channels are time-division-multiplexed for transmission and reception in a PCM 30 transmission system. The control- and switching-signals of the thirty telephone channels (e.g., dialing pulses, busy signals, dial tone signals, etc.) are converted from the form of ordinary D.C. currents to an encoded form which the time-division-multiplex system can process. The processing of all the control- and switching-signal data is performed during computing time intervals of a time frame which has been subdivided into computing time intervals in real-time using a control logic which cooperates with a data storage, the control logic being comprised of programmable and permanently wired functional circuit stages. The selection of a particular program from those programmed in such functional circuit stages is performed in dependence upon the significance of the control- and switching-signal information being processed.

Abstract: The invention relates to a photographic camera of high quality and extremely small dimensions. To this end the camera objective and the film track are provided on the front and rear faces, respectively, of a generally block-shaped central housing body. An upper housing portion extends on both sides laterally beyond the central housing body and carries, on its projecting parts, the film drive motor and a battery. A lower housing portion defines chamber members on both sides of the central housing body. These chamber members are open at the top and are interconnected by a rear wall and a bottom plate to define a space therebetween which accommodates the central housing body. The take-up and supply spools are located in the chamber members and, in turn, accommodate the film drive motor and battery, respectively, which project downwards from the upper housing portion.

Abstract: In a safety ski binding, a sole plate secured against lifting off is rotatably mounted on the ski surface in the heel region of the ski boot on a pivot extending perpendicular to the ski surface. The sole plate has a toe holder at its front end and a spring-loaded automatic heel mechanism for the ski boot at its rear end that opens to release the ski boot on the occurrence of a frontal fall load exceeding the spring resistance. To obtain complete release of the ski boot from the sole plate and thus from the ski on the occurrence of an excessive rotary fall load and for returning the sole plate to its normal position after the ski boot has been released, the sole plate has a slideway in the toe region as well as the heel region of the ski boot for securing the sole plate against lifting off and the automatic heel mechanism has a second degree of movement. Release of the ski boot is effected after the resistance of a separate spring has been overcome.

Abstract: A self reversing drive mechanism is disclosed for providing a reversible speed reducing drive between a drive shaft and the rotary tuner mechanism of a television receiver. The drive mechanism comprises an idler wheel freely pivotally mounted about the drive shaft and in engagement with it. The idler wheel has a circumference which is greater than the distance between the drive shaft and the driven member of the rotatable tuner. As a result, the idler wheel mechanism rotates about the drive shaft in either direction until itself engages with the driven member of the rotary tuner. This is done without any additional external forces to accomplish tight engagement of the idler wheel between the drive shaft and the driven member.

Abstract: A potentiometer assembly particularly suited for supplying tuning voltages for all of the bands of signals capable of receipt by a television receiver or the like, includes three segments of resistive material arranged in a circle on a support member. Each of the segments corresponds to a different band of frequencies to which the television receiver may be tuned. Band selection is effected by comparable conductive segments on the support member.In one embodiment, a single wiper is used to sweep all of the resistive segments to supply the desired tuning voltage output. A cam arrangement is used to adjust the detented position of the wiper relative to the support member to effect fine tuning at each position. Other embodiments utilize individually adjustable wipers for each station or detent position of the tuner, with each wiper being preset to effect the fine tuning at the detented position of the potentiometer assembly.