Abstract: A cement for attaching covering to walls, floors and similar bases includes an adhesive substance which may be glue or a synthetic adhesive and a filler material which may be powdered glass or quartz and which has the property of not interacting with the adhesive nor to be dissolved therein and to adhere to the adhesive substance only slightly or not at all. When the layer of cement dries after attachment, e.g., of the wall covering to the wall, the covering may subsequently be removed therefrom by simply pulling and without damage to either the base or the covering, because the cement splits into two separate layers, one of which remains on the base and the other of which remains on the covering being removed. In another embodiment, a layer of cement is applied to the covering and then dried. For attachment of the covering to the base, another layer of either splittable or non-splittable cement is applied to the layer of dried cement already present.

Abstract: A diaphragm valve which may serve as an equal pressure valve or as a pressure equalizing valve of a fuel metering and distributing unit for an externally ignited internal combustion engine. The valve has a flexible diaphragm having a clamped diameter and a pocket in the diaphragm supports a valve plate. The valve plate operatively cooperates with a valve seat of the valve and has an annular recess arranged to receive a spring to center the valve plate. The valve also includes a stationary thrust plate which is concentrically disposed relative to the valve seat, which defines a knife-shaped edge which lies in a common plane with the valve seat and which operatively cooperates with the valve plate. The knife-shaped edge is penetrated by a plurality of radially extending means defining openings therein.

Abstract: A fuel injection system for externally ignited internal combustion engines including a device for injecting fuel into an air stream and an air measuring device comprising a valve having an airfoil portion. The air measuring valve is pivotably mounted within the suction tube of the engine, thereby exposing the air measuring valve to the air stream flowing through the suction tube. The air measuring valve is exposed to a combination of forces. One of the forces is an impedance induced force developed in accordance with the principle associated with impedance type valves and as a function of the pressure prevailing in front of and behind the air measuring valve when viewed in the direction of flow of the air stream in the suction tube. The other force is a lift force and is developed in accordance with the airfoil principle and as a result of an air flow about the airfoil portion of the air measuring valve.

Abstract: An apparatus to control the composition of the operating mixture of an internal combustion engine in which the fuel is apportioned by means of a variable cross-sectional apportionment area where the pressure drop is kept constant by a differential pressure valve. The uncontrolled pressure chamber (reference pressure chamber) of the differential pressure valve lies downstream of an apportioning recessed area. A given fuel discharge quantity from the controlled pressure chamber of the differential pressure valve is determined in accordance with the fluctuations of the pressure in the reference pressure chamber, and a positioning motor provided for the correction of the magnitude effecting the deviation of the reference pressure is further actuated in accordance with the discharge quantity.

Abstract: A reservoir for a fuel injection system including an intermediate plate and a yieldable member movable relative thereto. The intermediate plate includes a flow opening and a throttle opening, the opening and closing of which are controlled by a valve. The valve is operatively connected with the yieldable member, which is biased toward the intermediate plate by a reservoir spring.

Abstract: A fuel injection nozzle in which the needle valve has been improved so that all similarly constructed nozzles will exhibit exactly the same flow cross section with a fully opened valve, and so that, with a constant injection pressure, the fuel quantity injected will not vary between the various nozzles serving the engine. The needle valve is provided with a cyclindrical section, which together with an edge region of the nozzle body defines the narrowest flow cross section obtainable with a spray-forming portion of the needle valve at a fully opened position of the needle valve.

Abstract: A leveling control mechanism for motor vehicles includes an electric pump and a solenoid valve for raising and lowering the vehicle body and a leveling switch with an electronic damping device. The periodic measurement of the distance from the vehicle axle to the vehicle body is carried out by a mechanical-electrical converter, which converts the rotation of a shaft into an electrical signal. During acceleration and deceleration of the vehicle, as well as during the occurrence of centrifugal forces, suitably situated inertial switches inhibit the response of the leveling control mechanism.

Abstract: A long spinning machine, preferably a ring spinning machine, with a plurality of drawing means, which serve to draw the fiber strands with the drawing means being arranged adjacent to each other and extending lengthwise of the machine the drawing lower rollers of the drawing means formed by a plurality of long roller lines positively connected together at one point by drive gear transmissions which provide predetermined rpm ratios between the roller lines with some of the roller lines connected together by additional drive gear transmission at least at one additional point spaced from the one point to eliminate or substantially reduce torsion in the roller lines.

Abstract: An electronic control circuit for operating an internal combustion engine near its lean running limit includes means for measuring the scattering bandwidth of the cyclic fluctuations of the combustion chamber pressure. This measurement is made indirectly by measuring the angular speed a rotating engine member, e.g., the crankshaft, and by forming and storing an appropriate analog signal. Circuitry is provided which supplies a nominal value of the scattering bandwidth which is compared electrically with the measured actual value. An appropriately processed difference signal is fed to a fuel injection controller which changes the fuel-air mixture to the desired ratio.

Abstract: An electro-magnetic valve having a very fast response and a favorable temperature-gradient characteristic. The valve includes an iron core which carries a stationary magnetic winding within a valve housing, and a plunger coaxially oriented relative to the iron core and separated from the core by an air gap. The magnetic winding is made of a metal having a specific resistance greater than 20 milli-ohms per square millimeter of cross-sectional area per meter length at 20 degrees centigrade. The valve may also include a temperature compensating resistor connected in series with the magnetic winding.

Abstract: The controlled variable of a system, in particular the timing of an internal combustion engine, is changed on the basis of a set point signal by a closed control loop which alters the relative settings of the breaker points and the distributor shaft, for example. The set point is a single value related to a specific set of magnitudes of engine variables. When the engine exhibits this specific set of magnitudes, the control loop is closed and the engine timing is adjusted to the set point. At other times, the timing follows open-loop, forward control signals such as provided by vacuum advance mechanisms, flyweight governors, etc. The apparatus includes a locking mechanism for locking the relative position of the breaker plate after adjustment by the closed loop controller.

Abstract: The induction tube of an internal combustion engine is provided with a bypass conduit which feeds additional fresh air to the induction tube downstream of the carburetor and the main throttle plate. The flow through the bypass is controlled by a pneumatic control valve which is actuated by selective admission of a mixture of pressures taken from the main induction tube and from ambient sources. The selection takes place on the basis of transducer signals related to engine conditions which are processed by a regulator.

Abstract: A circuit to be used in association with a fuel mixture control system which includes an oxygen sensor in the exhaust system to determine the relative richness of the combustible mixture. When the engine operates at low speeds, its control response time becomes large due to decreased engine throughput. In order to prevent control oscillations from occcurring under these conditions, the time constant of integration of the oxygen sensor control loop is changed to accommodate to the longer engine response time. For this purpose, the zero crossings of the oxygen sensor signal are compared with the unstable time constant of a multivibrator and a transistor which normally shunts a timing resistor is blocked, thereby increasing the time constant of the control integrator.

Abstract: A pivoting member, especially the air flow rate meter of an internal combustion engine is disposed in a hub which surrounds a locally fixed shaft and is positioned in the induction tube upstream of the throttle valve. The shaft is received in a plurally perforated bearing portion formed integral with the wall of the induction tube. The axial perforation in the bearing receives a tubular element with fuel being fed about the exterior wall thereof to a metering valve and surplus fuel arranged to flow through the tubular element to a pressure control valve.

Abstract: A device which influences the composition of the operating mixture supplied to an internal combustion engine having a suction tube and a bypass. The suction tube includes an adjustable mixture quantity control member and the bypass line includes at least one throttle member. Structure is provided to vary the adjustment of the throttle member in proportion to the adjustment of the mixture quantity control member and thereby vary the flow cross section in the bypass. A second throttle member cooperates with the other throttle member and is controlled by a control device connected to the engine to further vary the flow cross section of the bypass. Alternatively, a stylus and cam structure are provided which are utilized to produce the further variance of the flow cross section of the bypass. In this regard the stylus is controlled by the control device.

Abstract: A wheel lock prevention apparatus for the brakes of a motor vehicle having a common control of the pressure applied to the brake cylinders of a particular vehicle axle in which a 3/2-way valve is arranged to control pressure in the line leading to the respective wheel cylinders with individual 2/2-way valves located in another line between the respective brake cylinders and ahead of the 3/2-way valve.

Abstract: The composition of the combustible mixture supplied to an internal combustion engine is controlled in dependence on the fluctuations in cylinder pressure which are monitored by sensing the fluctuations in the rotation of the engine crankshaft. These fluctuations are measured by comparison with a signal which simulates an engine running uniformly at the basic engine r.p.m. The signal which characterizes the r.p.m. fluctuations is compared with a nominal or command value and the resulting signal is used to control the mixture composition so as to maintain the fluctuations within predetermined limits.

Abstract: Disclosed is a manifold and carburetor system especially for motorcycles having a plurality of cylinders so that each cylinder can be assured of uniform fuel input. Balancing means in the manifold uniformly distributes a fuel charge to the plural cylinders, and a choice of carburetor adapter plates provides flexibility in the selection of carburetors to accommodate a variety of driving conditions.

Abstract: A radiological apparatus, especially for the examination of objects by tomographic scanning, and equipped with a plurality of X-ray detectors. Each detector includes a scintillator crystal which is coupled to a photomultiplier by a light collector. The light collector is shaped in such way that all or a substantial majority of the light emitted by the scintillator crystal is reflected into the photomultiplier. In particular, the surface of the collector is made reflecting and the various portions of the reflecting surface are configured to reflect light emerging from a corresponding crystal face in a direction which misses the scintillation crystal and which permits entry in the photomultiplier tube. Various embodiments are presented wherein the surface is composed of circular, parabolic and polygonal cylinders.

Abstract: A fuel injection nozzle including in assembly the following essential components: a nozzle body; a needle valve and a control member. Two stages of injection are produced both of which are controlled by the needle valve. The control member serves during the second stage of injection and cooperates with the needle valve to effect this stage of injection. For this purpose the control member fits, in a radially sealed manner, within a blind bore formed in the needle valve and defines a channel through which fuel flows under the control of the needle valve. The channel in turn is connected with injection opens for the injection of fuel during the second stage of injection.