Abstract: An electrical switching device for a low cost measuring apparatus. The device comprises fixed contact elements which are made as straps implanted in a printed circuit board and a movable contact element made as a flexible blade mounted on a carrier device arranged on a slide attached to the PC board. The straps may be positioned by an automatic component insertion machine.

Abstract: In a hydraulic motor vehicle servo brake comprising a tandem master cylinder (11), a brake valve (17) is provided which upon actuation through the brake pedal (16) applies, in controlled manner, pressure medium supplied by a hydraulic pump (18) connected to an intake reservoir (27) to the first master piston (24) and to a brake circuit (III) directly, to provide there a controlled pressure. A wheel slip brake control system at an initial slip of one or more motor vehicle wheels, will reduce automatically the brake force on the motor vehicle wheels to a value just sufficient to turn the wheels. Two switch valves (21, 21') to which the controlled pressure is applied are normally closed and open upon a beginning slip of one or several motor vehicle wheels to apply the controlled pressure to the master cylinder (11) from where the pressure medium is passed by way of two check valves (23, 123) to the pressure chambers located behind the master pistons (24, 80).

Abstract: This invention relates to a hydraulic brake system for automotive vehicle with a master cylinder (2) and with a hydraulic power booster (1) connected upstream of the master cylinder (2) and having a pressure chamber (4) in which an auxiliary pressure depending on the actuating force (F) may be modulated via a pedal-operable brake valve (7). Wheel brakes (51, 53) of a first brake circuit are connected at the pressure chamber (4), wheel brakes (50, 52) of a second brake circuit being connected at the master cylinder (2). The braking pressure active in the wheel brakes (50 through 53) is controllable by valve members (39, 54 through 59) controllable in dependence on the slip. In case of control, a hydraulic communication will be established between the pressure chamber (4) of a hydraulic power booster (1) and the master cylinder.

Abstract: A pressure-fluid-operable vehicle brake system is proposed, which is fed by an auxiliary energy supply system (3) and which comprises a master cylinder device (1), in which a booster piston (40) adapted to be acted upon by the auxiliary energy is slidable in a pressure fluid chamber (26). When the auxiliary energy supply system (3) is intact, the booster piston (40) comprises an effective area for the pressurization of a wheel brake cylinder which is larger than an effective area which results upon failure of the auxiliary energy supply system. Upon failure of the auxiliary energy supply system (3), the necessary deacceleration is achieved because of a smaller effective area at the booster piston (40) and at a greater displacement travel of the booster piston (40) and with less pedal force (F).

Abstract: A slip control hydraulic brake system for wheel brakes wherein a sliding booster piston and a second piston form a working chamber with hydraulic pressure that acts upon a wheel brake. The booster piston and the brake system housing form two annular chambers, the second annular housing chamber larger than the first, whereby upon actuating travel of the booster piston the first annular housing chamber increases in volume and the second annular housing chamber decreases in volume.

Abstract: An antilocking arrangement with piston pumps for pumping the braking agent back from the wheel cylinders to the master cylinder, all modulators are combined in one housing in such a way that the pump piston can be driven by a single eccentric. For this purpose, all pistons as well as all paths of movement of the pistons are disposed in the plane of rotation of the eccentric.

Abstract: A method and a device for the generation of numerical values which are proportional to the frequency of the measured pulses of a measured-pulse train are proposed which make available the numerical values covering a wide measuring range with high precision and in a shortest possible time. To this end, in invariably predetermined reference time intervals, the number of the periods of the measured pulses is in each case measured as an approximate value for the frequency, and a correction value is added to the approximate value. The correction values are contained in at least one table as table values under respective addresses, the table values being derived from the difference between the time durations measured in successive reference time intervals up to the respective last measured pulse in the reference time interval.

Abstract: An auxiliary-energy-operable hydraulic brake system for automotive vehicles, in which a valve device connected to a pressure medium source and to an unpressurized reservoir and controlling an actuating pressure is operable by an actuating element which, irrespective of its direction of actuation, may be pressurized by a reaction force depending on the actuating pressure. The valve device is operable electromagnetically and controllable by an electric switching device connected with the actuating element.

Abstract: The present invention relates to a dual-circuit hydraulic brake system with slip control, in particular for automotive vehicles, wherein wheel brakes (26, 27, 41, 42) are connected via electromagnetically actuatable multiple-position valves (38, 39, 88, 40, 24, 89) to brake circuits which are hydraulically isolated from one another, wherein the brake circuits are adapted to be pressurized by a tandem master cylinder (1), on the one hand, and are connectible to a dual-circuit pump aggregate (76, 77) adapted to be driven electromotively, on the other hand. Both outlets of the pump aggregate (76, 77) are connected to normally closed brake valves (43, 44) which are governed by the master cylinder pressure and separating valves (11, 12) which are adapted to be closed by the outlet pressure of the brake valves (43, 44) are inserted into the connections between the tandem master cylinder (1) and the wheel brakes (26, 27, 41, 42).

Abstract: A center retention system for retaining a wheel cover on a vehicle wheel. The system includes a center piece coaxially disposed about the axis of the wheel. A plurality of radially extending straps are provided. The radially outer ends of the straps include hook portions which respectively wrap around the radially inner walls of the air hole slots in the wheel. The other ends of the straps are fastened to the center piece to rigidly locate the center piece along the axis of the wheel. The wheel cover is removably fastened to the center piece by a lock bolt or the like. The torque-tool-engaging surface of the lock bolt is provided in a keyed configuration requiring a unique tool for removal of the lock bolt.

Abstract: Electric switches whose fixed contacts (3) are formed by the conductors on a printed circuit board (1), which are coated with a layer of noble metal, the connections between the fixed contacts provided on a contact path (2) and electrically connected among each other, extend outside the contact paths (2) of the movable contacts. Prior to the application of the layer of noble metal the connecting lines are covered and, therefore, a considerable saving of noble metal results.

Abstract: A multiple lamp assembly is disclosed which uses stamped metal conductors. The problem of obtaining good contact to the center terminal of the lamp is corrected by providing an additional spring to the lamp recess. The added spring is held by a stepped extension fitted in a slot in the lamp recess.

Abstract: A switch with fastening holes in its housing is stably mounted on the web of a switching device. A plastics fastening element is used, which has three portions with differing diameters and which are inserted with press-fit in the fastening hole of the switch, on opposite sides of the switch, in receiving bores of webs aligned parallel to one other.

Abstract: A shock-absorbing resilient support for the suspension of a body on a support structure, particularly for the suspension of motor vehicle engines, motor lorry cabs and the like, comprises a chamber having a variable volume, which is filled with gas under pressure and serves to support at least part of the weight of the suspended body. The support further comprises two variable volume chambers filled with a viscous fluid and separated by a dividing wall provided with at least one passage for the transfer of viscous fluid from one chamber to the other upon displacement of the suspended body with respect to the support structure. Valve means are provided to vary the overall flow cross-section which puts the two chambers filled with the viscous fluid into communication with one another in the event of low frequency, high amplitude displacements of the suspended body with respect to the support structure.

Abstract: A resonator device comprises an elastic beam driven electrostatically at its natural frequency, or an harmonic thereof, by voltage pulses applied to an integral paddle member. The voltage pulses are derived from optical pulses fed via an optical fibre and reflected from the paddle member to a photodiode array. There is thus minimal coupling between the beam and the drive system. A positive feedback loop is provided in which light retroreflected from the paddle member is recaptured by the optical fibre and electronically detected, amplified and fed back in phase with the beam oscillations by modulating the optical pulses.

Abstract: A hydraulic brake system with slip control for automotive vehicles, with a pedal-operable braking pressure generator (1, 2) and with wheel brakes (16, 17, 22, 23) connected to the braking pressure generator, in which brake system between the braking pressure generator (1, 2) and wheel brakes (16, 17, 22, 23) valve means (14, 15, 18, 19, 24, 26) are arranged which are controllable by slip control electronics and by means of which the connections to the wheel brakes (16, 17, 22, 23) may be locked and connections may be established between the wheel brakes (16, 17, 22, 23) and a storage reservoir (21). For control of the acceleration slip by means of the slip control electronics in the brake system wheel brakes (22, 23) associated with the driven wheels communicate with an auxiliary pressure source (6) by way of a normally locking connecting valve (25) controllable by the slip control electronics.

Abstract: A novel space-saving socket and base assembly for high-voltage picture tubes is disclosed. The inventive socket, which does not project over the base in the direction of the longitudinal axis of the picture tube, is obtained by optimizing the air and creepage paths of the socket and base through the use of an aperture positioned in the base for locating the high-voltage lead. This effectively reduces the overall length requirements for mounting these tubes inside equipment housings, and the size of these housings thereby.

Abstract: A pressure control device to be inserted into a connection between a front wheel brake and a rear wheel brake which determines the rear brake hydraulic pressure in dependence upon front brake hydraulic pressure. The pressure control device provides a plurality of valve pistons hydraulically connected in parallel and displaceable by front axle hydraulic pressure in opposition to a control force. A predetermined change-over hydraulic pressure develops a braking pressure in the rear brake which is less than the front brake pressure. The valve pistons are provided by stepped pistons guided within stepped bores, each of which pistons provides smaller and larger effective pressure surfaces.

Abstract: In a radial piston machine, there is provided an outer stator and an inner rotor rotatable on a control pintle provided with supply and discharge channels. The rotor contains at least one radial bore in which is slidable a spherical piston comprising an outer ball and an inner cylindrical sleeve. The radially inward end of the sleeve, which end is adapted to be acted upon by the outlet pressure of the machine, includes a sealing lip which, during operation, in particular at higher pressures, expands circumferentially and, under certain circumstances, moves in sealing abutment with the inner wall of the radial bore.

Abstract: In the braking system of a motor vehicle, a hydraulically or electromagnetically actuatable valve is inserted into the return line to control and monitor hydraulic brake slip control devices supplied with energy from an external source. This valve opens or closes the return passage of hydraulic fluid from pressure reducing valves of static brake circuits in dependence upon the dynamic pressure developing in the booster chamber of brake valve network or in the prechamber of the master cylinder upon application of the brake or upon start of the brake slip control. Pressure reduction in the static brake circuits for preventing a wheel lock-up will thereby be avoided, if in the event of a control action no dynamic pressure develops in the booster chamber or in the prechamber on account of a defect.