Abstract: A vehicle brake control valve includes a piston assembly which is movable a stepped cylindrical bore of a valve housing in response to an actuating force against the force of a spring. The piston assembly includes port control edges which control communication between a brake pressure chamber which can be connected to the vehicle brakes, a reservoir, and a pump. Both the pump and the actuating force contribute to the brake pressure which builds up in the brake pressure chamber. The piston assembly includes an actuator piston and an annular piston that sealingly slides within a larger portion of the stepped bore. After the actuator piston moves a pre-set distance (H) it carries with it the annular piston. The annular piston, the actuator piston and a wall of the larger diameter portion of the stepped bore enclose a fill pressure chamber which is separated from the brake pressure chamber to achieve two-stage pressure build-up during manual braking (emergency braking) when the pump is inoperative.

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 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: A force sensor has a hollow flexible body with a fixed end and a free end. The force to be measured is applied perpendicular to the axis of the flexible body by a link coupled to the free end. A rigid gauge rod is connected to the free end of the flexible body and extends through the interior of the flexible body. The rod carries on its free end a permanent magnet which is near a Hall-effect sensor which is fixed to the fixed end of the body. The flexible body has a relatively low bending stiffness at its free end (in the area of force application) and an increasing bending stiffness towards its fixed end. The flexible body has a relatively low bending stiffness in the direction of force application and a higher bending stiffness in a perpendicular direction. The permanent magnet is arranged so that its poles are aligned parallel to the direction of force application.

Abstract: A valve control system includes a stepping motor coupled to an eccentric via a clutch. A valve member is urged into engagement with the eccentric by a spring. Rotation of the eccentric causes axial movement of the valve member which controls fluid flow through the valve. A detent releasably holds the eccentric in a neutral position.

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.