Abstract: An RFI shielding hood with an integral RFI filter arrangement for a distributor cap, so constructed as to provide strong attenuation in a predetermined broadcast and radio-telephone frequency range.

Abstract: Electric low current signals are transmitted through two-wire circuits having coaxial connectors which are closed by windings that are coupled transformer-like to the coaxial connectors. This arrangement allows transmission of control signals for electric power consuming devices within automobile doors, low frequency audio signals, and electrical power to power the electric consumers. All signals are transmitted on a common data cable. Control signals are in binary coded form, modulated onto a carrier signal, as are modulated, low frequency audio signals. The signals are demodulated in a door module and separated according to frequency. The low frequency audio signals are amplified and transmitted to a loudspeaker. The control signals are processed by a microprocessor controller in conjunction with switching units that create corrective actions for the power consuming devices located in the door.

Abstract: A material for electric contacts based on silver-tin oxide is obtained by mixing a powder of silver or an alloy mainly containing silver with a powder consisting mainly of tin oxide and 0.01 to 10 wt. % (in relation to the quantity of tin oxide) of an additive consisting of one or more compounds containing silver, oxygen and a metal from sub-groups II to VI of the periodic system and/or antimony, bismuth, germanium, indium and gallium, compacting the mixture and sintering it. The tin oxide may be replaced by zinc oxide.

Abstract: An electric microswitch includes a base and a cap. The base has a bottom pair of terminals downwardly extending that are hermetically sealed because they are integrally formed as part of the base, while the same terminals extend upwardly from the top of the base, and are in the form of spring contacts. The housing has a pair of apertured extensions that receive a pair of pins located on the housing. The cap includes internal stops that push the spring contacts together when the cap is acted upon while in a pivotable position so that contact pieces on the springs complete the circuit. When the housing is in a non-movable position, the spring contacts and contact pieces are hermetically sealed by the housing acting against a shoulder on the base.

Abstract: The invention relates to a material for electric contacts taking silver tin-oxide as basis, consisting of silver or mainly silver-containing alloy, tin oxide and other oxides or carbides of tungsten, molybdenum, vanadium, bismuth, titanium, and/or copper.

Abstract: A powder-metallaurgically produced material or extruded semi-finished product for electric contacts of silver or a silver-based metal material with 0.5 to 10 wt. % carbon and 0 to 2 wt. % of an additional metal. The material contains powdered carbon in combination with carbon fibers in the mass ratio of 10:1 to 1:10, whereby the diameter of the powder particles is on average smaller than half the length of the fibers.

Abstract: The ignition distributor comprises a housing, in which a distributor rotor (4) is rotatably mounted, which comprises a first electrode (9) close to the axis of rotation (5) of the rotor, a second electrode (10) at that end of the rotor which is remote from the axis of rotation, and between said electrodes an electrical line (11), which connects the two electrodes. The housing is closed by a distributor cap (1), which is provided on its inside surface with a plurality of peripherally spaced apart stationary electrodes ( 3 ), which cooperate with the second electrode (10) of the distributor rotor, and also comprises a center electrode (2), which terminates at a small distance from and defines a spark gap with the first electrode (9) of the distributor rotor. One electrode of the pair consisting of the first electrode (9) of the distributor rotor and the center electrode (2) is pinlike and the other electrode (9) does not surround the pinlike electrode (2) or surrounds it around less than its entire periphery.

Abstract: The apparatus for a continuous selective electrodeposition on a strip comprises a carrier (2), which guides the strip (1) in its longitudinal direction, which are faced by electrolyte discharge orifices (3), through which the electrolyte, which has been discharged by a pump (4) is sprayed onto the strip (1), which is covered by a mask tape (5), The mask tape (5) is provided with at least one row of holes (6) and urges the strip (1) against the carrier (2). The strip (1) is provided with drive means (7) for moving the strip (1) relative to the mask tape (5). The carrier (2) is straight and one or more pressure-applying elements (8), which are parallel to the carrier (2), are associated with the carrier (2) and urge the mask tape (5) against the carrier (2). The carrier and the pressure-applying elements, individually or jointly, define openings (3), which face the electrolyte discharge orifices (3) and overlap the holes (6) of the mask tape (5).

Abstract: A semifinished product for electric contact made from a composite material based on silver-tin oxide is described as well as a powder-metallurgical process of making said product. The structure of the semifinished products contains regions which contain no metal oxide or very little metal oxide in alternation with regions which contain the entire metal oxide component or a greatly predominating/share thereof in a fine division.

Abstract: The electrode consists of a metal carrier (1) and a surface layer (3), which has been deposited on the carrier and has a thickness of 0.1 to 20 .mu.m and consists of a material which differs from the carrier material and distinguishes from the carrier material by having a smaller work function and lower thermal and electrical conductivities and is selected from the group tungsten, niobium, tantalum, rhenium and chromium. The carrier (1) consists of a deeply drawable material. There is preferably also an interlayer (2) made of a highly conductive metal.

Abstract: In the method of controlling the wiping interval, the interval of time between two consecutive wiping movements, of which at least the second wiping movement was started arbitrarily, is measured, the measured value is stored and is subsequently used as interval time unless a different interval time becomes stored due to another arbitrary starting of wiping movements, or unless the interval operation of the wiper is interrupted or unless the control circuit is deenergized.

Abstract: The bodies consist of a ceramic slab (1), which is covered on both sides by metal plates (2, 3), which are firmly bonded to the ceramic slab (1) throughout their contact surface without an interlayer and have marginal strips (5) which are reduced in thickness.

Abstract: A reader for a disk-shaped carrier with Wiegand wires is described which manages with only two permanent magnets (1, 2). the variation of the magnetic field needed for detecting the Wiegand wires is effected by flux concentrating pieces (3, 4, 7) attached to the permanent magnets (1, 2). In order to be able to read the carrier with the Wiegand wires without change when it is inserted into the reader rotated by 180.degree. round its longitudinal axis coinciding with the direction of insertion (14), the flux concentrating pieces (3, 4, 7) are arranged symmetrically with respect to the longitudinal axis (14) which is a two-fold axis of symmetry. To pick-up the Wiegand pulses, two E-shaped soft magnetic cores (9) are provided which carry on their center leg an electrical sensor winding (17). The free ends of the legs of the E-shaped cores (9) face one another and are also arranged symmetrically with respect to the longitudinal axis (14).

Abstract: A reader for a disk-shaped carrier with Wiegand wires is described which manages with only two permanent magnets (1, 2). The variation of the magnetic field needed for detecting the Wiegand wires is effected by flux concentrating pieces (3, 4, 7) attached to the permanent magnets (1, 2). In order to be able to read the carrier with the Wiegand wires without change when it is inserted into the reader rotated by 180.degree. round its longitudinal axis coinciding with the direction of insertion (14), the flux concentrating pieces (3, 4, 7) are arranged symmetrically with respect to the longitudinal axis (14) which is a two-fold axis of symmetry. To pick-up the Wiegand pulses, two E-shaped soft magnetic cores (9) are provided which carry on their center leg an electrical sensor winding (17). The free ends of the legs of the E-shaped cores (9) face one another and are also arranged symmetrically with respect to the longitudinal axis (14).

Abstract: The material for electric contacts having arc-quenching properties comprises an irreversibly cured polymeric molding compound, which contains 5 to 20 volume percent of a metal powder and optionally contains up to 40 volume percent of an additional filler consisting of an electrically non-conducting inorganic powder. The selected thermosettable molding compound can be cured without forming a liquid phase.

Abstract: There is described an improved process for the production of tri-metallic contact rivets, in the course of which a cylindrical slug is formed with increased diameter under constant plastic deformation (upsetting) from three wire segments, and on this slug a head is then formed on one end by transformation.

Abstract: The power circuit breaker particularly for use in medium-voltage switchgear comprises contacting parts consisting of a contact pin, which is displaceable in the direction of its longitudinal axis, and a contact socket, which is coaxial to said pin and comprises a forward portion adapted to contact the pin. That forward portion of the socket is formed with axial slots dividing that forward portion into axial segments. Each of said segments comprises at its tip a covex portion, which protrudes radially inwardly and resiliently bears on the pin when the breaker is closed. In such breaker the pin has a forward portion, which comprises a tip and which has a length that is smaller than the largest depth to which the pin can be inserted into the socket. That forward portion consists of a composite material, which contains a metal having a high electrical conductivity and a material which releases quenching gases under the action of an electric arc.

Abstract: The magnetic field sensor comprises a bundle consisting of a plurality of identical parallel bistable magnetic elements, which are surrounded by respective electrical windings, which are all wound in the same sense and are electrically connected in parallel.

Abstract: The reading head comprises a core, which carries an electric detector winding and which may be E-shaped for reading two rows of Wiegand wires or U-shaped for reading one row of Wiegand wires. Two platelike permanent magnets are spaced from the outer legs of the core. One pole face of each permanent magnet is covered by a low-reluctance element, which terminates close to the core in a top plan view on the reading surface. The core and the magnets include such an oblique angle that in the reading surface of the reading head each low-reluctance element is spaced in the reading direction from the adjacent free leg end of the core. This arrangement ensures that during the reading operation each Wiegand wire will first enter the relatively extensive magnetic field established between those pole faces which are not covered by low-reluctance elements. Thereafter, the Wiegand wire is trigger and then enters the region between the low-reluctance elements and is saturated in that region.

Abstract: To manufacture a catalyst for purifying the exhaust gases from internal combustion engines, which catalyst comprises a skeleton comprising sintered alumina and at least one stabilizing rare earth element oxide and is preferably provided as a coating on a metallic, mineral or ceramic support, and which catalyst comprises at least one noble metal, which is finely dispersed on said skeleton, a solution is provided, which contains at least one noble metal salt and at least one salt of at least one rare earth element and optionally also an aluminum salt. Said solution is subjected to spray pyrolysis in contact with oxygen to produce a composite powder consisting of at least one noble metal, at least one rare earth element oxide and, if desired, alumina. Said composite powder is applied and sintered to a surface layer of the alumina skeleton.