Abstract: An explosion protected socket of the ignition protected type for double pin base fluorescent bulbs including a protected clamping device for securing the socket pins against coming loose and associated electrical connecting structure configured so that a receiving element provided with insertion openings for the socket pins is mounted to be movable within limits in the socket housing. The clamping device is coupled to an actuating device which becomes active jointly for both socket pins. A locking device which is positively coupled to the clamping device is disposed at the receiving element and is equipped with at least one locking element which is movable between an active position and an inactive position to hold the socket pins at a predetermined safety distance from voltage carrying parts of the electrical connecting structure.

Abstract: A semiconductor means is integrated monolithically on a substrate and comprises at least one power diode (3), its cathode being at a higher potential (6) than the potential (5) of the substrate. Its anode forms the emitter and its cathode forms the base of a parasitic substrate transistor (4). In order to reduce the power loss caused by means of this parasitic substrate transistor (4), means (8) for increasing the collector path resistance (41) of the parasitic transistor (4) are provided.

Abstract: A power tool for trimming laminate having a motor, a motor housing, interchangeable bases, and a clamping ring. The motor housing has a lower portion having a smaller diameter than that of the rest of the housing. The clamping ring extends from and over the base and clamps around the lower portion of the motor housing. The interchangeable bases are formed as a trim router, laminate trimmer, offset trimmer, and tilt base trimmer, all of which clamp onto the lower portion of the motor housing so that the same motor can be used with any of the bases. The motor housing is also rotatable relative to the base into any one of a plurality of relative angular positions without affecting depth of cut of a bit.

Abstract: An electromagnetically actuatable fuel injection valve which has an internal scavenging system for cleaning dirt particles from a magnetic field air gap. A portion of the fuel flowing in via an inflow line and an inflow opening reaches the vicinity of an air gap defined on one side by an armature and on the other by magnetic poles and flows through this gap, and then flows via an outflow opening to enter an outflow line that communicates with a fuel return. As a result of the described scavenging of the air gap, dirt particles are prevented from becoming firmly attached there and causing impairment of the performance of the fuel injection valve.

Abstract: In a permanent-magnet-excited commutator motor, especially a small motor for motor vehicles, the short-circuit ring (13) of the stator (12) has soft iron auxiliary poles (16), to attain an inverse speed characteristic. The permanent magnets (15) rest with their arc-shaped outer face on the short-circuit ring (13) and are laterally supported on one side by a side flank of the auxiliary poles (16) and on the other side by a supporting element retained on the short-circuit ring (13). To enable securing the permanent magnets in a manner suitable for large-scale mass production, the supporting elements are embodied as protrusions (19) bulging radially in the inward direction and integral with the short-circuit ring (13). Assembly is accomplished by simple insertion of the permanent magnets (15) between the auxiliary poles (16) and the associated protrusions (19).

Abstract: An acceleration detector, the spring is a substrate plate, e.g., of Al.sub.2 O.sub.3, which is fixed at one end in a housing. The resistors and the evaluating circuit are arranged on the spiral spring and can be applied to the substrate plate in a single work step using thick-film technology.

Abstract: The acceleration sensor consists substantially of a leaf spring (12) with an eddy current disk (13), which is arranged at its free end as an inertia mass, and an eddy current brake with magnets which are polarized in opposite directions (16, 17), and a flux conducting piece consisting of low reluctance iron. The latter serves the purpose of oscillation damping of the spring-mass system formed by the leaf spring (12) and eddy current disk (13). By means of a sensor magnet (19) and a Hall element (20), the lift of the inertia mass is transformed into output voltage which is proportional to the acceleration. Such an acceleration sensor is installed in a motor vehicle, for example, and serves to trigger safety devices such as belt tighteners. It has the advantage that the frequency response is only slightly dependent upon temperature and is very simply and compactly constructed.

Abstract: An apparatus for measuring the mass of a flowing medium and a method for producing the apparatus. The apparatus includes a carrier, to which at least one resistor layer is applied. To calibrate the resistance value of the resistor layer, material can be removed in a calibration zone on the end of the resistor layer remote from the incident direction of flow. To this end, the resistor layer is connected with a current source furnishing a constant current. The temperature of the resistor layer is measured by means of a temperature measuring device and compared in an electronic device with a predetermined temperature, and the electronic device, upon a deviation of the measured temperature from the predetermined temperature triggers a material removing device for the removal of resistor material in the calibration zone (trimming zone).

Abstract: A multiple service fitting for enabling through-floor passage of a plurality of different types of conductors, from a multi-cell underfloor raceway source thereof to an in-floor or above-floor outlet therefor.A mechanism operable from the accessible end of such fitting enables secure engagement thereof with the top walls of the multi-cell underfloor raceway without moving the fitting body portion, to compensate for floor slab deflection.A grommet and conduit extending tube, seated in and projecting from the opening in the top wall of the underfloor raceway cell, isolate and protect conductors passing therethrough.

Abstract: An exhaust gas recirculation valve construction and method of making the same are provided, the valve construction comprising a housing provided with an inlet and an outlet separated by a valve seat, a movable valve member carried by the housing for opening and closing the valve seat and an electrically operated stepper motor carried by the housing and being operatively interconnected to the valve member for positioning the valve member relative to the valve seat. The valve member and the valve seat are arranged so as to be reverse acting and a spring is operatively interconnected to the valve member to tend to move the valve member to its closed position with the valve seat upon loss of electrical current to the motor.

Abstract: Two logic circuits (4A, 4B) are utilized in alternation for controlling the processing of successive pixels that are detected to be erroneous. Each logic circuit has its own counter 5A and 5B for associating the undisturbed pixels with ordinal numbers designating their spacing from the disturbed pixel under processing and likewise has a separate PROM (6A, 6B) and a separate multiplier for weighting the undisturbed pixel values, as well as an accumulator (10A, 10B) for summing the weighted values to produce a substitute value, so that undisturbed pixels lying between two disturbed pixels can all be used, where necessary, both for compensating for a preceding disturbed pixel and a following disturbed pixel.

Abstract: A brake pressure booster and modulator for vehicle brake systems, in which a displaceable part is disposed in a pressure chamber that is acted upon by a master cylinder and communicates with the wheel brake cylinders, this part being in turn part of a permanent magnet, so that with increasing or decreasing pressure from the master brake cylinder, a transfer storage of potential energy takes place to a simultaneously increasing extent in one or the other direction by a magnetic operative connection with a second magnet. To effect pressure modulations when anti-skid functions are realized, the second permanent magnet is in operative magnetic communication with the first magnet and simultaneously is subjected to the movement of this second permanent magnet to open a relief pressure chamber while simultaneously closing the primary pressure chamber.

Abstract: A connector for pipes has two tubular parts each with three angularly spaced inclined bores intersecting the inner surface of the parts and containing balls engaging inclined wedge surfaces and biassed axially by respective springs. In use the parts are drawn together by rotating nuts on studs and the balls grip the pipes and compress a seal, the balls gouging into the pipes. The recesses could be on the outer side of the parts for engaging an external pipe. The balls can move axially and radially in the recesses for accommodating local ovality and engage surfaces over an arc of circumference of the balls. The parts need not be tubular and one part could be closed off to provide an end cap for the pipe in the other to form a clamp.

Abstract: A device for injecting fuel into a combustion chamber of an internal combustion engine, having a glow coil (22, 92) disposed on the outlet side of the injection nozzle and increasing in size conically toward the combustion chamber; the coil is surrounded by a sleeve (30, 96) which firmly holds the end turn (88, 93) of the glow coil (22, 92) toward the combustion chamber and has a contact ring washer (46, 98), on which the other end turn (86, 94) of the glow coil (22, 92) is secured. The end turn (88, 93) toward the combustion chamber rests on an annular shoulder (90, 107), oriented according to the invention toward the combustion chamber, of the sleeve (30, 96), which surrounds an insertion opening (91, 106) the inside diameter of which is smaller than the outside diameter of the end turn (88, 93) toward the combustion chamber, but greater than the outside diameters of all the other turns of the glow element (22, 92).

Abstract: A motion-damping apparatus is proposed which has a shock absorber disposed between a vehicle axle and a vehicle body. A piston that is supported on the vehicle body via a piston rod is movably supported in an inner jacket tube of the shock absorber. The piston divides work chambers filled with an electrorheological fluid as a damping fluid. The work chambers communicate with one another via an overflow cross section, the size of which is defined by a control slide the position of which is determined by an axially movable sheath. The sheath forms a first electrode, while the walls of an annular conduit receiving the sheath form a second electrode. The intensity of an electrostatic field that can be developed between the electrodes has an influence on the magnitude of the shear stress of the damping fluid flowing in the annular conduit and hence on the deflection of the sheath. In this way, the damping of the shock absorber can be adjusted via the electrostatic field present at the electrodes.

Abstract: A dual-circuit brake system for utility vehicles is disclosed which enables simultaneous anti-skid regulation in two brake circuits (I, II). To this end, the brake cylinders of the axle of the first brake circuit (I) that is equipped with sensors is monitored directly by pressure control valves and dependent thereon the brake cylinders of the second brake circuit (II) are monitored via relay valves. The circuits are secured from one another via a pressure control lock valve.

Abstract: In an automotive engine control microcomputer the frequency of interrupt programs initiated by a pulse from an engine speed tachogenerator is prevented from being excessive as a result of loose connections or other malfunctions or distrubances by blocking the access of tachogenerator pulses to the interrupt port of the microcomputer for a predetermined interval following a successful interrupt from that source. If another signal that would produce an interrupt from that source is received during that interval, a circumstance indicative of probable malfunction, the blocking of interrupts from that source is continued for another interval of the same length.

Abstract: Contact pins of fuel injection valves are typically sealed off from the valve housing with sealing rings and provided with small plastic caps to protect them from an extruded plastic coating. The present invention simplifies this sealing. Accordingly, the housing includes axially aligned ducting bores with each ducting bore including a bore wall, each ducting bore of a valve housing is provided with at least two spaced bore grooves and each contact pin has at least two spaced contact pin grooves. Automatic sealing of the bores is attained by extrusion filling of the ducting bores and extrusion covering of the contact pins in the vicinity of the contact pin grooves based on the different temperature coefficients of the valve housing and plastic covering used.

Abstract: To retain a plate-like sensing element, for example made of ceramic, in position within a metallic housing without danger of breakage or loosening under conditions of vibrations or shock or wide swings of temperature and substantial temperature gradients, a metallic housing has a longitudinal opening wherein in which two sealing elements are located, for example made of aluminum oxide. The sealing elements are formed, each, with an internal pocket, for example extending conically outwardly towards their meeting surfaces, to form a chamber. The chamber is filled with a resiliently compressible powder or pulverized material, for example talcum, and separates the elements by a gap (31) extending outwardly to the walls of the metallic housing. The sensor element is passed through slits formed in the end regions of the sealing elements (26, 27) and is retained in position by the compressible powder or pulverized material.

Abstract: A system for controlling injection time points and quantity of the fuel injection in a self-igniting internal combustion engine includes a transmitter of reference pulses (R) coupled to a crankshaft and a transmitter of speed pulses (D) and of a synchronizing pulse coupled to the camshaft. From the distance of two speed pulses immediately preceding a reference pulse, a measuring interval and instantaneous angular speed are determined. The injection time point is computed as a function of the instantaneous angular speed and of engine variables. By means of the synchronizing pulse, the measuring section and the reference pulse are assigned to a corresponding cylinder.