Abstract: A tire pressure detector for motor vehicles which is to be fastened to a wheel rim comprises a pressure switch actuated by the air pressure in the tire for monitoring the tire pressure. The pressure switch includes a reference pressure chamber with an electrically conductive switching diaphragm which closes the chamber toward the tire and which cooperates with a contact pin of the reference pressure chamber and an electric oscillating circuit connected to the latter in the detector housing. The reference pressure chamber (23) is axially clamped between a supporting ring and a spacing ring of insulating material in the metallic detector housing by a radial collar, which is formed, so that an annular gap is formed between the collar and the inner wall of the detector housing.

Abstract: An emergency control device for a diesel internal combustion engine with electronically controlled fuel proportioning, which enables an optimal emergency driving operation in case of a defect of the transmitter or transmitters for the actual value of fuel volume. In the event of an error, the mechanism determining the desired value of fuel volume during normal operation, and the fuel volume regulating device, are separated from the fuel proportioning device and the latter is controlled by a special emergency driving signal. An error in the transmitters for the actual value of fuel volume is recognized in that this signal does not fall in the allowable area for the actual value of fuel volume. A first signal, which, together with a second signal, gives the emergency driving signal, is formed from the speed and the accelerator position. The second signal consists substantially of the differentiated speed signal.

Abstract: Wheel speed (V.sub.R) and braking pressure (P.sub.B) applied to a wheel are continuously measured and utilized to estimated values from a mathematical system model, to obtain the physical values: coefficient of friction (.mu.), vehicle speed (V.sub.F), slope of a slip curve (d.mu./dS), slip (S), and coefficient of friction of a stationary-rotary brake couple structure. At least one of the physical values so obtained, and preferably the coefficient of friction (.mu.), vehicle speed, and slope of wheel slip curve are used to control braking pressure being applied to the wheel. Braking pressure can be controlled for example for braking in accordance with coefficient of friction and slope of the friction-slip curve, for example to operate the wheel just before the coefficient of friction drops as the wheel begins to slip. Spinning of a wheel can be avoided by controlling the braking pressure to be below slippage value.

Abstract: A fuel injection apparatus for internal combustion engines in which via an electrically controlled valve communication is established between a pump work chamber of a fuel injection pump and a low-pressure fuel chamber, and the switching times and movement times of the valve member of the valve are detected with the aid of a switching position transducer. The actual switching times are used for correction of the control times of the valve and thus for correction of the quantity of fuel attaining injection.

Abstract: In a precision adjustment head for a machine tool a slide (9) is radially adjustable in a radially extending guide (8) in a substantially cylindrical housing (1), on which slide a tool carrier (11) can be fixed. In the housing (1) the positioning member 5 is axially displaceable and a positioning element (14) is fixed to the slide (9), with a groove (15) extending obliquely to the housing axis A and tapering to its groove bottom (15a), in which engages a projecting insert (19) provided on the positioning member (5), tapering towards its free end in correspondence with the groove cross section. The insert (19) is adjustable and fixable relative to the positioning member (5) perpendicular to the groove bottom (15a).

Abstract: The invention is directed to a method for assuring emergency driving functions with a diesel engine when the fuel temperature sensor fails, the diesel engine having a charging-air blower and a charging-air temperature sensor. The method includes performing a fuel temperature dependent correction of specific operating functions by taking the charging air temperature as a basis such that all functions corresponding to a fuel temperature of T.sub.K =+20.degree. C. are fulfilled at a charging air temperature of T.sub.L .gtoreq.0.degree. C. and all functions corresponding to a fuel temperature of T.sub.K =-10.degree. C. are fulfilled at a charging air temperature of T.sub.L <0.degree. C. The functions include the start control path, starting speed, idle speed, control path correction, and basic quantity control.

Abstract: An electric toaster wherein the housing defines a toasting chamber for slices of bread or other goods and the chamber has an outlet for toasted goods at or close to its lowermost portion. The chamber is flanked by two ceramic panels which can store substantial amounts of heat and transmit infrared radiation. Each panel defines with a semicylindrical reflector a compartment for one or more halogen lamps which emit radiation directly against the respective panel or indirectly as a result of deflection by the corresponding reflector. Gravitational descent of goods from the chamber can be blocked by a gate- or rod-like barrier which is movable into the outlet by hand or automatically in response to completion of a toasting operation.

Abstract: A piston machine, particularly a radial piston machine which includes a pintle supporting a rotor which has a plurality of radially extending bores in which radial pistons are guided. These bores are in communication with control chambers formed in the pintle. One of the chambers is a high-pressure chamber and the other is a low-pressure chamber. Pre-control grooves and additional passages are provided at the control chambers to prevent, during the operation of the radial piston machine the occurrence of pressure shocks at the inner and outer dead centers.

Abstract: In a safety and emergency driving control method and an associated arrangement for an internal combustion engine with self-ignition used to power a motor vehicle, various operating parameters of the engine are continuously monitored and respective signals indicative of gas pedal position, engine operating speed, brake actuation, and actual control rod displacement are generated and evaluated to determine simultaneous occurrence of a modified idling operation condition and of a predetermined minimum value of the actual control rod displacement signal. In response to such a simultaneous occurrence the engine control is switched over to another regulation branch which controls the control rod displacement in accordance with a minimum value characteristic line of the control rod displacement. Further peripheral devices are included for providing starting hysteresis and excess speed protection, and for supervising the operation of the control rod displacement sensor.

Abstract: An rpm governor for fuel injection pumps of internal combustion engines, having a pivotable spring tensioning lever which is engaged by an rpm signal transducer counter to the force, acting as the guide variable, of a governor spring and on which a pivot shaft following up the adjusting movement of the tensioning lever, of a two-armed transmission lever is disposed. The transmission lever is articulated on a quantity control member and is pivoted via an electrical adjusting motor. The adjusting motor is triggered by an electrical control unit, which processes engine and environmental parameters and effects a correction of the injection quantity.

Abstract: An axial piston pump for pumping a medium such as a viscous liquid in which a wobble element is set into rotating movement via a piston, the wobble element moving at least one feed piston in a piston bore. The piston bore is intended to communicate, via a transverse line and a further piston bore which is occupied by a control piston, with an intake line for the medium to be pumped. By means of this axial piston pump, which is valve-controlled on the compression side and slide-controlled on the intake side, liquid having a high viscosity can be pumped without a loss of efficiency, and any noise produced by the pump can be reduced. These latter advantages are reinforced still further provided the feed system is received in a pump insert that is supported with respect to a pump housing by means of elastic bearing elements.

Abstract: A differential pulse code modulation system wherein digital code words assigned to the signal differences adjacent to the signal difference "Zero" have the same number of bits of one or the other logical level. In this manner, "d.c. voltage" information in the transmitted signal is neutralized.

Abstract: To permit only centered insertion of variously sized cassettes (SML) of a set of cassettes into an opening leading into an insertion well of a tape transducer housing (H), cover flaps (1,3,7) are located across the opening, the cover flaps being positioned symmetrically with respect to a central axis of symmetry (XX) of the insertion path. One of the flaps, corresponding in size to the smallest one of the cassettes, closes off the path for the smallest cassette. The next flap is subdivided into two flap portions located, symetrically, adjacent the center flap, and cross-connected by a cross-connecting shaft or strap (3c,63c). Adjacent thereto are outer flap portions (7a,7b). The respective flap portions are locked in position by releasable locks (4) engageable by the leading edge of the respective cassettes. The locks are located adjacent the outer edges of the respective flap portions. Only if both appropriately sized flap portions are released from the locks, can the openings be completely uncovered.

Abstract: In a magnetic tape machine which can be played to reproduce television pictures at speeds different from the recording speed, in connection with which the video signals are stored in a picture memory, the video signals are stored under group addresses in 60-byte blocks, both for the luminance and chrominance signals. After a predetermined storage period has elapsed, the stored data are overwritten with erasing value signals. A circuit arrangement for this operation includes an administrative memory (4) for which the storage duration values for contents stored under every block address is, beginning after writing-in, successively reduced in value. When a zero value is reached, the corresponding block address is stored and used in its turn as a write-in address for the erasing value signals which replace the video data previously written in to the picture memory under this address.

Abstract: To prevent distortion of a cassette housing, and specifically of the top or plan surface (T) thereof upon engagement of the cassette housing with drive rollers, a drive shaft (34) extends transversely across the housing and carries a plurality of pairs of drive rollers (50,51; 52,53; 54,55), of increasing diameters starting from a central axis of symmetry (X--X), the respective pairs of rollers being spaced from each other by a distance which is just slightly smaller than the widths dimension of the respective cassette of the set to be introduced therein. A motor (35) is coupled to the shaft to rotate the shaft, for insertion, or ejecting movement.

Abstract: Hydraulic drilling apparatus and method suitable for use in a variety of applications including the drilling of deep holes for oil and gas wells and the drilling of vertical, horizontal or slanted holes, drilling through both consolidated and unconsolidated formations, and cutting and removing core samples. The drill head produces a whirling mass of pressurized cutting fluid, and this whirling fluid is applied to a discharge nozzle to produce a high velocity cutting jet. The cutting action is enhanced by abrasive material in the drilling fluid. The direction of the borehole is controlled by controlling the discharge of the drilling fluid either in side jets directed radially from the distal end portion of the drill string which carries the drill head or in a plurality of forwardly directed cutting jets.

Abstract: Brake equipment for a hydraulic vehicle brake system which has an actuating assembly and a feed pump secured elastically thereon. The two communicate with one another via at least one suction and pressure line each. To assure an inexpensive, dependable flexible line connection between component parts that move relative to one another, the suction and pressure lines are embodied as housing bores in the assembly and pump housings and for a liquid-tight connection of two successive housings bores at a time extending in the course of the lines in the assembly housing on the one hand and in the pump housing on the other, at least one connecting tube is disposed in two flush bearing bores in the assembly housing and in the pump housing. The connecting tube rests pivotably and longitudinally displaceably in the bearing bores sealing off the bearing bores.

Abstract: The housing of a machine for brewing coffee, tea or other hot beverages confines or carries a water container, a riser which conveys water from the container past an electric heater and into a manifold, and a filter holder. The manifold has two sections which are separably connected to each other to define an inlet connected with the riser, a first outlet which can deliver hot water to the filter holder, and a second outlet which can return water into the container. A disc-shaped valving element has a central portion clamped between the two sections of the manifold and a marginal portion which can snap over from a first position, in which the valving element seals the inlet of the manifold from the first outlet, to a second position in which the valving element seals the inlet from the second outlet of the manifold.

Abstract: A tire pressure detector for motor vehicles which is to be fastened at the circumference of a wheel rim and comprises an oscillating circuit having coupling coil which cooperates with a stationary receiver coil. In order to increase the minimum air gap between the rotating coupling coil and the stationary receiver coil, the coupling coil, which rotates with the wheel rim, is arranged on a middle limb of a plate-shaped ferrite core. The magnetic coupling for the stationary receiver coil is improved by means of the shape of the ferrite core (23).

Abstract: A housing having an inner part radially inside of an outer part so as to form a hollow space therebetween. The outer part has two opposite end portions which radially extend inward toward the inner part so as to further define the hollow space. The end portions and the inner part form interengaging projections and grooves. The inner and outer parts are composed of different materials with different heat expansion coefficients. The interengaging projections and grooves are thermally expanded against each other to effect a moisture-tight sealing of the hollow space.