Abstract: A crankshaft having a substantially cylindrical crank surface centered on a crank axis and a pair of axially confronting and axially spaced cheek surfaces flanking the crank surface and meeting the crank surface at respective fillets is ground by an apparatus having a shoe between the cheek surfaces and having an end directed at the crank surface and sides directed at and spaced inward from the cheek surfaces. A pair of side parts on the sides of the shoe each can move axially of the shoe relative to the crank axis and a flexible grinding band is stretched over the side parts and shoe. The crankshaft is rotated about the crank axis or an axis parallel thereto and the shoe is urged radially toward the crank axis to press the band against the crank surface. The crankshaft and the shoe between the cheek surfaces are relatively axially reciprocated and each of the side parts is urged axially outward away from the shoe to press the band axially against the cheek surfaces.

Abstract: An apparatus for the precision grinding of conical valve seats of nozzles, for example, injection nozzles for internal combustion engines. The body is entered hydraulically on a mandrel and a driver has a rubber O-ring braced against the nozzle body to frictionally engage it is rotation while passing through the mandrel for the shaft of a grinding tool which is located at the end of the mandrel. The system avoids radial clamping stresses on the workpiece and hence allows, precision low tolerance finish grinding to be achieved.

Abstract: A timing and control circuit and method for a synchronous vector processor (SVP) device having a plurality of one-bit processor elements organized in a linear array. This circuit includes a master controller circuit, a vertical timing generator circuit, a constant generator circuit, a horizontal timing generator circuit and an instruction generator circuit.

Abstract: A hydraulic system includes a hydraulic pump, a reservoir, a hydraulic function, such as a cylinder, and a power beyond valve for controlling communication between the pump, the reservoir and the cylinder. The pump provides pressurized fluid at a pump output as a function of the pressure in a load sensing port. For generating a pump controlling load sensing signal in case that the cylinder does not generate such a signal, it is proposed to provide a valve which blocks in a first position or opens in a second position communication between the feed line of the cylinder and the load sensing port of the pump. The valve functions in dependence of control pressures acting on each side of a valve member. A spring is provided biased to urge the valve member to its first closed position. Further, shift valve means are provided to supply selectively different pressures to both sides of the valve member.

Abstract: A position sensor assembly for sensing the rotary position of a rockshaft of a hitch mechanism includes a rotary potentiometer coupled to the rockshaft. The rockshaft is enclosed in a rockshaft housing and a sensor housing is attached to the rockshaft housing. The potentiometer is attached to an outside surface of the sensor housing and has a sensor shaft which extends through a portion of the sensor housing. The position sensor has a first set of gear teeth on the rockshaft meshing with a second set of gear teeth on the sensor shaft. The sensor housing at least partially encloses the second set of gear teeth. The first and second sets of gear teeth are preferably configured as gear segments. The sensor shaft is supported for rotation by the sensor housing. The potentiometer is preferably a spring-pre-loaded potentiometer. A second spring is mounted on the second set of gear teeth and is engagable with a wall of the sensor housing to define an assembly position.

Abstract: A photosensitive silver halide material comprising a support and at least one photosensitive silver halide emulsion layer, of which the emulsion contains an effective quantity of at least one compound from each of at least two classes A, B, C and D defined hereinafter:A) compounds corresponding to general formula I ##STR1## B) compounds corresponding to general formula II ##STR2## or tautomers thereof, C) compounds corresponding to general formula (III) ##STR3## D) compounds corresponding to general formula IV ##STR4## in which R.sub.1 -R.sub.3, R.sub.11 -R.sub.19, Y, Z, m and n are as defined in the specification,are distinguished by effective latent image stabilization for a minimum increase in fogging and loss of sensitivity.

Abstract: Improved photographic recording materials contain silver halide grains having at least two zones differing in their halide composition and, as stabilizer, a compound corresponding to the formula ##STR1##

Abstract: A heat developable color photographic recording material is improved in its D.sub.min /D.sub.max ratio and sensitivity if it contains a silver halide emulsion in which the grains have at least three zones differing in their silver halide composition.

Abstract: The sensitivity of highly sensitive color photographic recording materials may be enhanced by compounds releasing fogging or development accelerating compounds as a result of a reaction with color developer oxidation products and fogging may at the same time be reduced by using compounds corresponding to formula I as silver halide stabilizers: ##STR1## wherein Z denotes the atoms required for completing an oxazole or oxazine ring andY denotes a condensed aromatic ring system having at least one aromatic ring optionally substituted with an acid group, or a substituent carrying an acid group.

Abstract: A control system for the hitch of a tractor includes a motor for moving the mechanical control linkages connected to a hitch control valve, the motor being in the form of an electric motor. The motor is controlled by way of an electrical circuit which includes a main switch, one or more secondary switches which are disposed outside a driving cabin, and a safety switch. The safety switch permits flow of current to the motor only when positional regulation is selected by a hitch control mode selector lever.

Abstract: A new compound is disclosed, N-(chlorocarbonyloxy-5-norbornene-2,3-dicarboximide I, in addition to processes for its production and employment of the compound as starting product for the manufacture of non-symmetrical carbonate, urethane-protected amino acid or peptide, activated carrier and carrier-ligand-complexes. The new compound is reacted with alcohols as well as with hydroxyl-group-containing or amino-group-containing polymers.

Abstract: Improved silver halide emulsions are obtained by the combined use of an iridium compound and an imidazole before termination of crystal growth.

Abstract: A valve includes a valve housing having a valve bore with a first valve member movable therein to control fluid communication between a pump, a reservoir and a hydraulic function. The first valve member includes annular grooves which receive pressure controlled seals. A second valve member is movable in the valve bore and is connected to an actuator. The first and second valve members cooperate to form a pre-control valve which controls pressurization of the pressure controlled seals. The second valve member also connects the actuator with the first valve member so that the seals are relieved of pressure before the first valve member is moved.

Abstract: Photographic recording materials containing a silver halide emulsion in which the grains have zones of differing iodide content provide improved sensitometric results.

Abstract: Surface-sensitized silver halide grains having a core/shell structure show improved properties.

Abstract: An improved bushing assembly which includes a housing having a cylindrical bore formed therein. A bushing is engageable in the cylindrical bore of the housing and is journaled onto a rotatable shaft which extends out of the housing so as to be attached to a drive mechanism. The bushing contains a smooth internal bore and has a stepped outer circumferential profile. The profile includes a smooth circular lead-in surface with an external diameter approximately equal to the diameter of the cylindrical bore, a larger diameter surface containing self-tapping threads for positively engaging an inner portion of the housing which surrounds the cylindrical bore, and a collar formed adjacent to the threads and opposite to the lead-in surface. The collar has a tool receiving configuration so as to accept a tool for threading the bushing into the cylindrical bore. A thrust bearing is mounted on the rotatable shaft and is sandwiched between a shoulder on the shaft and the lead-in end of the bushing.

Abstract: An improved hydraulic control valve is disclosed for providing the metering of fluid to a steering arrangement such as that normally employed on a motorized vehicle. The steering arrangement includes a piston-cylinder assembly, a main pump for supplying pressurized fluid from a fluid reservoir to the control valve and a control pump connected to the control valve which is actuated by a manually operated steering mechanism. The improved control valve includes a housing having an elongated bore formed therein. Movably positioned within the bore is a valve spool which has at least three annular grooves formed thereon separated by a pair of lands. The valve spool also contains a longitudinal bore formed therein which intersects a transverse bore which opens into the centrally positioned annular groove. The valve spool cooperates with the elongated bore to form control pressure chambers at each end thereof.

Abstract: Blowdown device for steam power plants includes a tube extending into a volume of water, the tube being formed with a multiplicity of holes having a substantially uniform diameter for introducing, into the water, steam that is flowing in the tube, the holes being disposed in rows spaced one from another a distance equal to at least 2.5 times the diameter of the holes.

Abstract: A photographic material with at least one light-sensitive silver halide emulsion is disclosed. The emulsion has been prepared by carrying out the precipitation of the silver halide in the presence of certain imidazoles.

Abstract: Automatic recalibration and testing of the accuracy of an analog-to-digital converter is accomplished in a converter of the type that compares the analog input signal with a linearly changing ramp referene signal and measures the time interval required for the magnitude of the reference signal to reach the level of the analog input signal from an initial level. In the invention, the linearly changing ramp reference signal is allowed to continue beyond the end of the converter's measuring phase and is thereupon compared with a datum voltage by a comparator which determines when equality between the two occurs. At the end of the measuring phase, a control pulse of fixed duration is generated and if the time of occurrence of equality is within the duration of that pulse, the converter is then operating within a suitable range of accuracy.