Abstract: The present invention relates to a guide device comprising a baseplate unit having formed therein a guide channel for guiding electronic devices, wherein at least two portions of the baseplate unit are spatially fixed, said guide device being characterized in that means for compensating the thermal expansion of the baseplate unit are provided. The invention additionally relates to a test apparatus which comprises the guide device according to the present invention.

Abstract: The invention relates to a device for testing electronic components (3) with at least two mechanical transfer elements (5a, 5b), of which each can be loaded in each case at a dedicated loading position with an electronic component (3) and with a common test position (7), into which the two transfer elements (5a, 5b) can be brought. Furthermore, the invention relates to a device for testing electronic components with at least two mechanical transfer elements (80a, 80b), of which each can be loaded in each case at a common loading position (88) with an electronic component (3) and with a common test position (89), into which the two transfer elements (80a, 80b) can be brought. The invention also relates to the associated method.

Abstract: The invention relates to a discharge lamp comprising a discharge vessel (2) and an electrode frame (3) which is provided with a lamp coil (33) and at least some sections of which extend into the discharge vessel (2). Electrode holders (31, 32) are connected to a glass bead (34), at least some areas of which are sealed into an end region (21) of the discharge vessel (2).

Abstract: The present invention relates to a guide device comprising a baseplate unit having formed therein a guide channel for guiding electronic devices, wherein at least two portions of the baseplate unit are spatially fixed, said guide device being characterized in that means for compensating the thermal expansion of the baseplate unit are provided. The invention additionally relates to a test apparatus which comprises the guide device according to the present invention.

Abstract: The invention relates to a device for testing electronic components (3) with at least two mechanical transfer elements (5a, 5b), of which each can be loaded in each case at a dedicated loading position with an electronic component (3) and with a common test position (7), into which the two transfer elements (5a, 5b) can be brought. Furthermore, the invention relates to a device for testing electronic components with at least two mechanical transfer elements (80a, 80b), of which each can be loaded in each case at a common loading position (88) with an electronic component (3) and with a common test position (89), into which the two transfer elements (80a, 80b) can be brought. The invention also relates to the associated method.

Abstract: A process for encapsulating a component made of organic semiconductors is provided which includes steps of: a) providing a housing including a substrate with electrical connections and a cover; b) mixing a soldering glass with at least one of a binder and a solvent; c) applying the soldering glass at least to the cover, in the form of an encircling bank; d) expelling the binder or solvent; e) sintering-on of the solder; f) covering the substrate with layers which represent the semiconductor component together with electrodes; g) placing the cover onto the substrate; and h) locally heating the soldering glass by means of a light source with a predetermined peak wavelength, wherein the housing parts and soldering glass are matched to one another such that their coefficients of thermal expansion differ from one another by less than 1.0×10?6K?1.

Abstract: The invention relates to a discharge lamp, in particular a high-pressure discharge lamp having a discharge vessel, which has at least one sealed-off end which is provided with a current feedthrough. The section of the electrode which extends into said sealed-off end is provided, according to the invention, with a coating, which contains a high-melting metal from the group of the platinum metals, preferably ruthenium.

Abstract: An opto-electronic semiconductor element has a radiation emitting or receiving, that is, radiation active semiconductor chip secured to an electrically conductive base frame. One, or a plurality of chips, are surrounded by a housing which may be integral with or have, separately, a cover. All materials of the housing, as well as of the conductive base frame, have mutually matching thermal coefficients of expansion within the temperature ranges which arise during manufacture and in application of the semiconductive element, singly or as a plurality in a common housing. Glass, quartz glass, ceramic or glass ceramic are suitable for the housing or parts thereof; the conductive base frame is preferably made of cladded or jacketed copper wire or strip with an iron-nickel core. Assembling a plurality of chips in a housing which has a luminescence conversion layer, e.g. a phosphor applied thereto, permits construction of a flat light source.

Abstract: A process for encapsulating a component made of organic semiconductors is provided which includes steps of: a) providing a housing including a substrate with electrical connections and a cover; b) mixing a soldering glass with at least one of a binder and a solvent; c) applying the soldering glass at least to the cover, in the form of an encircling bank; d) expelling the binder or solvent; e) sintering-on of the solder; f) covering the substrate with layers which represent the semiconductor component together with electrodes; g) placing the cover onto the substrate; and h) locally heating the soldering glass by means of a light source with a predetermined peak wavelength, wherein the housing parts and soldering glass are matched to one another such that their coefficients of thermal expansion differ from one another by less than 1.0×10−6K−1.

Abstract: An opto-electronic semiconductor element has a radiation emitting or receiving, that is, radiation active semiconductor chip secured to an electrically conductive base frame. One, or a plurality of chips, are surrounded by a housing which may be integral with or have, separately, a cover. All materials of the housing, as well as of the conductive base frame, have mutually matching thermal coefficients of expansion within the temperature ranges which arise during manufacture and in application of the semiconductive element, singly or as a plurality in a common housing. Glass, quartz glass, ceramic or glass ceramic are suitable for the housing or parts thereof; the conductive base frame is preferably made of cladded or jacketed copper wire or strip with an iron-nickel core. Assembling a plurality of chips in a housing which has a luminescence conversion layer, e.g. a phosphor applied thereto, permits construction of a flat light source.

Abstract: An opto-electronic semiconductor element has a radiation emitting or receiving, that is, radiation active semiconductor chip secured to an electrically conductive base frame. One, or a plurality of chips, are surrounded by a housing which may be integral with or have, separately, a cover. All materials of the housing, as well as of the conductive base frame, have mutually matching thermal coefficients of expansion within the temperature ranges which arise during manufacture and in application of the semiconductive element, singly or as a plurality in a common housing. Glass, quartz glass, ceramic or glass ceramic are suitable for the housing or parts thereof; the conductive base frame is preferably made of cladded or jacketed copper wire or strip with an iron-nickel core. Assembling a plurality of chips in a housing which has a luminescence conversion layer, e.g. a phosphor applied thereto, permits construction of a flat light source.

Abstract: A laboratory pump (1) for liquids has a pump housing (2) with an inlet opening (3) and an outlet opening (4) and in which at least one pump rotor (5) rotates. The pump rotor (5) is joined either directly or indirectly by means of a transmission with a magnet (6), which is magnetically coupled with a rotating magnetic field of a magnetic stirrer (8). In addition, the pump housing (2) of the pump (1) can be joined with the magnetic stirrer (8) in such a way that the magnet (6) comes under the influence range of the rotating magnetic field of the magnetic stirrer (8) and is driven by it. The pump has no driving means of its own, and therefore can be designed in an especially simple way. Magnetic stirrers (8) present in laboratories can be used for driving the pump (1), and thus obtain an additional function.

Abstract: Ultraviolet (UV) radiation in the UV-C and UV-B bands, which is particularly dangerous, is absorbed and filtered by quartz glass doped with between 0.065% and 3.25%, and preferably between 0.065% and 1.3% by weight, of cerium metal, or cerium as such. Preferably, the cerium is added to quartz sand and/or rock crystal, in form of a fine-grained powder of up to 2 0 .mu.m grain size, in form of cerium aluminate (CeAlO.sub.3), present in up to about 5% by weight, and preferably up to about 2%, and melted together in a single step. The quartz glass so obtained is particularly suitable for a metal halide discharge lamp, e.g. as an outer envelope (1), or as the discharge vessel (27) itself, or for halogen incandescent lamps, to form the quartz-glass light bulb or an envelope therefor. A small quantity of titanium oxide, up to about 0.05%, may be added as a further doping agent to the melt to further improve the UV absorption in the B and C bands.

Abstract: Ultraviolet (UV) radiation in the UV-C and UV-B bands, which is particularly dangerous, is absorbed and filtered by quartz glass doped with between 0.065% and 3.25%, and preferably between 0.065% and 1.3%, by weight, of cerium metal, or cerium as such. Preferably, the cerium is added to quartz sand and/or rock crystal, in form of a fine-grained powder of up to 20 .mu.m grain size, in form of cerium aluminate (CeAlO.sub.3), present in up to about 5% by weight, and preferably up to about 2%, by weight, and melted together in a single step. The quartz glass so obtained is particularly suitable for a metal halide discharge lamp, e.g. as an outer envelope (1), or as the discharge vessel (27) itself, or for halogen incandescent lamps, to form the quartz-glass light bulb or an envelope therefor. A small quantity of titanium oxide, up to about 0.05%, may be added as a further doping agent to the melt to further improve the UV absorption in the B and C bands.

Abstract: A process and apparatus for solvent extraction of fat from a sample. The ple is held in a thimble located in a sample vessel. The sample vessel holds solvent in which the sample is initially immersed. The solvent is vaporized by a heating unit and condenses on a cooling coil above the sample vessel. The condensed solvent is caught in a funnel equipped with a drain line leading to an external solvent collection vessel. A timer controlled valve opens and closes the drain line.

Abstract: An arrangement for carrier recovery of two pulse shift keyed signals comprising a bandpass filter at the input which is followed by a series connection of a full-wave rectifier, a carrier frequency filter and a frequency divider is particularly characterized in that the input signal is converted into a push-pull signal in a transformer and employed for driving an emitter-coupled amplifier, two pairs of emitter-coupled transistors being connected in series between the input and a pair of operational amplifiers. A first of the operational amplifiers is connected to a voltage controlled oscillator. Its output is connected to a first frequency divider, the first frequency divider being connected to a further frequency divider for a further division of two for connection to a demodulator which receives the input signal.

Abstract: A fluid pressure operated piston engine assembly, such as a pump assembly, including a fluid pressure operated piston engine and a fluid valve for coupling fluid under pressure to alternative portions of the piston chamber of the piston engine. As disclosed, as the drive shaft of the piston engine approaches each end of its stroke, fluid under pressure is coupled by the fluid valve to a portion of the piston chamber to effect reversal of direction of travel of the drive shaft. The fluid valve includes a valve rod which is translated to effect the alternative modes of coupling pressurized fluid to the piston chamber. To accomplish this a drive frame is mounted for limited translation on the valve rod and driven by a pair of pins, attached to the piston engine drive shaft, at the ends of the drive shaft stroke.

Abstract: Radio frequency heat sealing method and apparatus for simultaneously fabricating a plurality of separate items from separate sets of continuous plastic strips or sheets as these sets are indexed in unison past a heat sealing station. The technique utilizes a platen equipped with heat fusing and tear sealing dies on its opposite faces and which platen is located between separate sets of plastic strips and a pair of cooperating platens. The die equipped intermediate platen is preferably cooled to permit rapid cycling and indexing of the sets of stripping therepast.