Abstract: A brake pressure regulating valve to be inserted in a fluid line between a master brake cylinder and a wheel brake cylinder of one axle of a vehicle comprises a stepped differential bore having its larger diameter section by-passed by an internal bore and a control valve controlling the inlet port of the internal bore including a shoulder of a housing for the regulating valve and a sealing ring disposed on the smaller diameter section of the differential piston and sealingly engage the housing bore encompassing the larger diameter section of the differential piston.

Abstract: A pressure reducer for hydraulic brake systems comprising a valve formed by the head of a spring-loaded piston and by a sealing ring which is urged by a spring against a step of the housing. Arranged between the spring and the sealing ring is an engaging plate which is carried along by the piston after the piston has travelled an amount smaller than the valve stroke. This results in an exactly defined valve stroke and at the same time results in a quick opening of the valve upon decrease of the inlet pressure.

Abstract: The two channel transmit only antenna includes a balanced antenna and a ground plane disposed between the two radiators of the balanced antenna. The two radiators are fed by a three wire arrangement having one conductor connected to ground and the ground plane and two conductors each connected to a different one of the two radiators. A first channel filter is coupled between a first source providing a first transmit signal in a first frequency channel and one of the two conductors and a second filter is coupled between a second source providing a second transmit signal in a second frequency channel and the other of the two conductors. At least one resistor is connected between the two radiators.

Abstract: The frequency synthesizer to generate a selected, adjustable discrete frequency output signal comprises a pair of acoustic means, a circuit to excite one of the pair of acoustic means with pulses having a given repetition frequency and to excite the other of the pair of acoustic means by the pulses after being delayed a given variable amount, and a frequency mixer coupled to each of the pair of acoustic menas to provide the selected discrete frequency output signal. Several embodiments of the acoustic means are disclosed.

Abstract: The weight of a cast piece, such as a brake caliper casting, is reduced by inserting a core element of lower density than the density of the moulded or cast material into those areas of the cast piece which are not highly stressed when the cast piece is subjected to bending forces. Preferably, the core element is cast in place along with the casting material.

Abstract: A monolithic integrable R-2R resistor network comprises a number of series resistors connected to a terminal resistor; and a plurality of 2R resistor units each capable of being switched by two electronic switches either to ground or to another reference point, a different plurality of 2R resistor units being coupled to the nodes between each of the series resistors, to the node between the terminal resistor and the last resistor of the series resistors and to the node ahead of the first resistor of the series resistors. To compensate for the effects of the variations of the switch resistances caused during manufacture by process parameter fluctuations upon the accuracy of a D/A converter, a switch structure is inserted at each of the nodes which, with respect to the two electronic switches, is of the same kind, and which is permanently in an electrically conducting state.

Abstract: A pressure reducer for hydraulic brake systems comprises a stepped piston carrying a sealing ring in a circumferential groove thereof. The sealing section of the sealing ring begins at the groove wall adjacent the outlet chamber and joins a transitional section of smaller diameter adjacent the inlet chamber. The sealing ring fills the groove essentially completely at least in the sealing section. Preferably the sealing ring abuts the bottom of the groove over its entire axial length. This results in a defined position for the sealing section without excessive friction and wear occurring during operation.

Abstract: Converters are known where input pulses are coupled to a detector stage via an adding device and a first integrating register. The detector stage provides an output signal relative to threshold values which increases, keep constant or reduce the contents of a second integrating register. The contents of the second register are coupled to the minus input of the adding device. The time variation of the input pulses may be coupled from the detector stage. According to the present invention the dynamic behavior, stability and suppression of disturbances is improved by differentiating the input pulse train, coupling this pulse train to the detector stage and to integrate the output of the detector stage with the integration factor being constantly adjusted to the output signal of the detector stage.

Abstract: To reduce the brake-application travel necessary for brake shoe actuation, to reduce the brake fluid volume consumption of the brake-shoe-actuating member in a hydraulic brake, to reduce the brake pedal travel required for a braking operation and to improve the efficiency of a floating caliper disc brake, there is inserted a spreading device between the brake-shoe actuating device and the brake pad connecting the circumferential travel of the brake pad caused by engagement with the brake disc into an axial displacement increasing the axial distance between the brake-shoe actuating device and the brake shoe, when the spreading device is moved out of its spring-biased central position into engagement with a supporting surface at the brake housing.

Abstract: Dual circuit pressure control valves for brake system are known in which the control pistons are located parallel to each other with each control piston controlling a different one of two brake circuits. Both control pistons are loaded by a common preloading force. The known arrangement is complicated in its construction and has a large overall length. According to the present invention, the construction is simplified and the overall length is reduced by providing a torsion spring which provides the preloading force acting on the control pistons via stationarily supported swivelling levers.

Abstract: The brake actuating device is disposed in a cylindrical bore of a disc brake caliper leg and comprises an actuating spindle and an actuating nut interconnected by a ball bearing thread. The actuating spindle has a central bore receiving an adjusting spindle surrounded by a sleeve, one end of which is connected to an adjusting nut threaded onto the adjusting spindle and transmitting the actuating force thereon. The other end of the sleeve is accessible through a bore from the outside of the caliper leg and can be turned with a tool in order to reset the adjusting nut for replacement of the worn brake pads.

Abstract: A decoupling arrangement for non-insulated track circuits is disclosed wherein the receiving circuit of the evaluating unit for the AC track currents is electrically separated from the traction-current-carrying parts of the track. The cross bonds between the two rails of a track may be shorting bonds or so-called S bonds. The arrangement according to the invention improves the tuning behavior of the track circuit receivers considerably.

Abstract: A hydraulic booster comprising a booster piston, an annular piston bearing against the booster piston and a central piston which is movable within limits relative to the annular piston by the brake pedal to control flow of a pressurized fluid. The central piston and the annular piston are coupled together to move as a unit after the force of a spring is overcome. The central piston is subject to the pressure acting on the booster piston. In order to reduce the force reaction on the brake pedal, the central piston is operated by the brake pedal through a pin subjected to the pressurized fluid, the pin extending centrally through the annular piston in a sealed relationship thereto.

Abstract: Dual circuit brake force control units are known in which the initial preloading force is changeable dependent on the vehicle load. The preloading force is distributed to the control pistons by means of a lever. Due to the tolerances and erosion of the individual elements, considerable differences in pressure in both brake circuits may occur. Therefore, according to the present invention a lever is provided which directly acts on both control pistons and which is rotatable around an axis parallel to the direction of displacement of the control pistons and additionally around the longitudinal axis of the lever. The lever is in interaction with its housing mount at one support point at least and at two support points at the most with the support point or support points being located at least approximately in the longitudinal axis of the lever.

Abstract: Brake systems having an antiskid control apparatus are known in which pressure fluid is additionally supplied from a dynamic circuit into the static brake circuit when pressure fluid has been taken therefrom due to an antiskid control operation. In this situation, the known systems were not able to maintain the master cylinder pressure at a constant value. Therefore, according to the present invention a valve device is provided which is acted upon by the static master cylinder pressure in the opening direction and by the dynamic auxiliary pressure in the closing direction.

Abstract: A carrier member for replaceable friction linings for clutch-type disc brakes wherein the friction linings are guided and held radially relative to a brake disc by a positive engagement with grooves in an adjacent surface of the carrier member with the friction linings being supported in the circumferential direction relative to the disc by supporting elements connected to the carrier member. The supporting elements engage bores in the carrier member perpendicular to the adjacent surface and are held in their mounted position by a friction lining overlapping an edge of the adjacent supporting element.

Abstract: The wire cutting, skinning and wrapping tool includes a hollow sleeve, a knife carried by the sleeve, a bit provided with a longitudinal groove which is able to slide in a forward and backward direction in the sleeve, the bit and the knife skinning an insulated wire over a predetermined length and a means to move the bit from a backward to a forward position during the skinning operation. The sleeve is provided by normally closed sleeve halves with the insulated wire opening the sleeve halves during the skinning operation and with the sleeve halves closing again when the bit is in the forward position after each skinning operation. The length of skinned wire is captured between the bit groove and the closed sleeve halves.

Abstract: An arrangement is disclosed for an electronic cabinet housing at least one removable electronic chassis enabling n plugs mounted on one of the chassis and the cabinet to reliably engage n receptacles mounted on the other of the chassis and the cabinet, where n is a natural number including one.

Abstract: In a dual-circuit pressure control valve for hydraulic brake systems, the control pistons disposed parallel to one another are each loaded by a first arm of an associated angular lever. Each of the levers have a second arm perpendicular to the first arm acted upon by a common tension spring disposed therebetween. The levers are located approximately in a plane defined by the axes of the control pistons. The tilting axes of the levers are disposed perpendicular to this plane and are disposed outside the axes of the control pistons. This results in a short overall length in both the axial and radial direction. In addition, a carrier device is provided which couples one of the control pistons with the lever of the other control piston after a small relative movement of the control pistons. This carrier device becomes effective upon failure of one brake circuit. The carrier device may be formed by extensions of the first arms which overlap one another with play.

Abstract: A floating caliper disc brake comprising a brake support with two arms projecting over the edge of the disc, a brake caliper extending between the arms and embracing the disc, and brake shoes arranged on opposite sides of the disc. The caliper is supported radially inwardly at the arms and the brake shoes are supported radially outwardly at the arms. The brake shoes and the caliper are connected to and maintained in their position at the arm of the brake support by a detachable holding arrangement.