Abstract: An arrangement for transmitting signals from a device (3) for monitoring the tire pressure in vehicle wheels (1), being arranged in the tire preferably as one module together with a valve, and comprising a pressure sensor arranged for measuring the tire pressure and generating an electric pressure signal, a control circuit, a battery as power source, and a transmitter with a sending antenna for transmitting the measured pressure signal as a radio-frequency (RF) signal under the control of the control circuit to a central evaluation and control unit (8), which is arranged in the vehicle (2) and which is connected to receiving antennas (4), to which individual wheels (1) or groups of wheels (1) of the vehicle (2) are allocated, via a RF receiver which comprises a demodulator and transforms the received RF signals to low-frequency (LF) signals.

Abstract: A method for allocating identifiers, that are contained in signals issued by transmitters arranged in a tire pressure monitoring system, to the positions of the wheels by transmitting the signals to a receiving and analysis circuit, which analyses the information, contained in the signal, wherein for differentiating between wheels on the right side of the vehicle and wheels on the left side of the vehicle, the sign of a translation acceleration b is determined for each running wheel, the sign of the variation of the centrifugal acceleration z occurring during the translation acceleration b is additionally determined and multiplied by the sign of the translation acceleration b determined for the respective wheel, and the differentiation between wheels on the right side of the vehicle and wheels on the left side of the vehicle is effected by comparing the products of the two signs determined for the wheels.

Abstract: The invention relates to a method for assigning identifiers, contained in signals emitted by transmitters in a tire pressure control system, to the position of the wheels where the transmitters are located. Said system comprises a pressure sensor, a transmitter and a transmit antenna on each of a plurality of wheels of a vehicle, one or more receive antennas on the vehicle body, and receiving and evaluating units connected to this body via cables. In this method, the signals containing the identifier are intercepted by the receive antenna(s) and transmitted to the receiving and evaluating units, where they are evaluated in accordance with their identifiers. The invention is characterized in that, for the monitored wheels, not just the air pressure in the tires, but also the acceleration obtained from the movement of the wheel is measured.

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: 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: 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: The distributor comprises a rotatably mounted rotor, which has close to its axis of rotation a first electrode and has at its end that is remote from the axis of rotation a second electrode, which is connected by an electric line to the first electrode. The distributor also comprises a housing, which is closed by a cap, which is provided on its inside peripheral surface with a plurality of peripherally spaced apart fixed electrodes for cooperating with the second electrode of the roto. The cap is further provided on its inside surface with a center electrode, which terminates at a distance from the first electrode of the rotor to form a spark gap therewith. To form a positive joint with the cap the embedded portion of the center electrode has a non-cylindrical peripheral surface, which is rounded and free of any edge.

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: 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 load-isolating switch comprises two coaxial electrodes 1 and 2, which are mechanically connected by an interposed insulator 3. A cam 4 is provided on the insulator 3 and is spanned by at least one contact bridge 5, which is axially displaceable by an axially displaceable slider 10, which has coupling elements 13, 14 for engaging the or each contact bridge 5. In one position the or each contact bridge 5 is in contact with both electrodes 1 and 2. The or each contact bridge is adapted to slide up on an inclined surface 4a of the cam to disengage the contact bridge 5 from one of said electrodes and is movable to a second position in which said slider is disengaged from at least said one electrode.