Abstract: A new aluminum grain, together with a process for its preparation, suitable for use in blasting agents is described. The grain, obtained by shearing sheet material of various types with a modified cutter comprises largely flat particles with jagged edges, and contains minimal quantities both of oversize and undersize particles.

Abstract: A lawn cultivating machine comprising two parallel cutter shafts which are onnected together by a transmission gear and are rotatable about their axes, and on each of which shafts a plurality of cutters are arranged at spaced intervals from each other, the cutters of one shaft being displaced relative to the cutters of the other shaft, in which the speeds of the cutter shafts are in a certain transmission ratio and the directions of rotation of both cutter shafts are identical.

Abstract: A tool for reconditioning or restoring the threads of externally threaded members, such as bolts, studs, and the like, includes, in one embodiment, a collet having a bore formed therethrough with a portion of the bore defining a guide surface, and a threading insert that includes thread cutting means. In order to recondition threads, the threading insert is selectively positioned along the longitudinal axis of the threaded member with the thread cutting means engaging the threads of the member. The collet is placed over the end of the member and positioned such that the threading insert is received within a socket formed in the collet thereby retaining the threading insert in place against the externally threaded member. Rotation of the tool relative to the threaded member causes the cutting means to recondition the threads. In one alternate embodiment, the cutting means are associated with the collet rather than with the threading insert.

Abstract: An automatic golf ball teeing apparatus comprised of a chamber placed beneath the ground. A hollow piston is mounted in the chamber for vertical movement between first and second positions. Mounted within the piston is a pair of vertically spaced apart members; each of the members are movable relative to the piston; mounted between the members is a first coil spring and mounted between the lower member and the lower end of the piston is a second coil spring. A sleeve is mounted around the piston and is movable relative thereto and extends above the piston when the piston is in a lowered position. The sleeve is connected to the lower member such that the sleeve and lower member move together relative to the piston. A stop element is located at the top of the chamber for engaging the sleeve as the piston moves towards the second position for stopping movement of the sleeve relative to the piston, the second coil spring urging the sleeve back to its initial position as the piston is moved to its first position.

Abstract: The growth of a solid obtained by cooling a liquid solution is observed and controlled by measuring the variation in volume of the solid-liquid system at the time of solidification. The method is applicable to the control of oriented crystallization from an initial crystal seed or epitaxial growth on a substrate having a suitable crystal orientation. The rate of crystallization can be controlled by means of a furnace provided with means for producing regulated thermal gradients, temperature-measuring means, a chamber filled with an inert liquid, an open-topped container filled with the liquid to be solidified and immersed in the inert liquid, the container being suspended from one arm of the beam of an electrobalance.

Abstract: A corona generating apparatus for use in an electrophotographic copying machine is disclosed, which includes an elongated shield of a conductive net member defining an open ended chamber and a corona discharge electrode mounted in the chamber. The conductive net may be backed by a conventional conductive shield plate.

Abstract: The accumulator chamber communicates with the atmosphere through a passage which is formed therein with a restriction for restricting the cross sectional area of the passage or which is provided therein with a pressure control valve for opening the passage in response to a difference between the atmospheric pressure and the vacuum in the accumulator chamber which difference is above a predetermined value to maintain the vacuum differential between the accumulator and vacuum chambers above a predetermined value when the engine suction vacuum is above a predetermined value.

Abstract: A metal vapor source with a regulatable flow rate comprising an enclosure filled with said vapor, means for heating said enclosure to a first temperature, a tube connected to the enclosure and means for heating said tube to a second regulatable temperature, the first temperature being maintained above the second temperature.An ion analyzer comprising an enclosure in which is disposed a target to be analyzed, a lens for extracting secondary ions whose front face faces the target, an enclosure filled with an alkaline vapor, means for heating said enclosure to a first regulatable temperature, a vapor outflow tube connected to one end of the enclosure, while the other end penetrates the analyzer enclosure, traverses the extraction lens and assumes a position level with the front face of the extraction lens and means for heating said tube to a second regulatable temperature, the first temperature being kept above the second temperature of the outflow tube.

Abstract: A rear window washer wiper control comprising a first movable member and a second movable member, the movable members comprising a slide switch for a washer circuit and a slide switch for a wiper circuit. Both switches are incorporated in one case to energize a wiper motor by moving the second movable member to the right and also to push and move the second movable member accordingly when the first movable member is moved to the right, thereby working a washer motor and a wiper motor simultaneously.Once an operating piece of the first movable member is released, the first movable member is forced back to the original position thereof by virtue of a built-in spring for automatic resetting, thus resulting in the washer motor stopping. The wiper motor continues to work so long as the second movable member is not manually reset to the original state thereof.

Abstract: A feed for ruminants is produced by mixing 90-99.5% by weight of a vegetable fiber material which is indigestible by ruminants and 0.5-10% by weight of a non-protein nitrogen compound and inoculating the mixture with an effective amount of an alcoholic fermentation micro-organism, an organic acid fermentation microorganisms or an ester formation microorganisms and fermenting the inoculated mixture.

Abstract: A method for forming a contactor adapted to transmit oil from a reservoir of oil-impregnated wicking material formed of a fluent mixture of oil and oil retaining particles to a bearing surface, includes the steps of filling a mold cavity of a predetermined size and shape with a charge of fibrous particles, compressing the particles to a density such that the spaces between the particles form a network of interconnected pores sized smaller than the interstices between the particles in the wicking material, and bonding the particles together to form a solid porous mass.

Abstract: The method for controlling the migration of an electronegative chemical species within a solid substrate which exhibits ionic conduction consists in irradiating the substrate with electrons which have sufficient energy to penetrate into the substrate and to produce therein metastable excited negative ions of said species and in applying to said substrate an electric field having a direction opposite to the desired direction of migration.

Abstract: An internal combustion engine of the type wherein a particular group of engine cylinders are not supplied with air-fuel mixture during light load engine operation, comprises a gas supply device for supplying exhaust gas or fresh air into the particular group of cylinders when not supplied with air-fuel mixture, and a control device for stopping the supply of the exhaust gas or fresh air when a brake pedal is depressed to slow down the speed of a motor vehicle, so that engine brake becomes effective or is improved during light load engine operation.

Abstract: A fluid injection system and method for an internal combustion engine such as a spark-ignition or compression-ignition engine in which an injection nozzle injects a finely divided spray of fluid, such as water or a water solution, into the engine in response to a flow of atomizing air. The nozzle is connected to a fluid supply reservoir and to the outlet line of an air-injection pump that supplies pressurized air to the exhaust system of the engine. The air-injection pump provides the supply of atomizing air to the nozzle with the pressure of the air and therefore the fluid injection being responsive to both the engine speed and the exhaust gas pressure. The injected fluid advantageously functions as a cooling agent to suppress detonation and provide smoother engine operation and greater fuel efficiency.

Abstract: An adjustable headrest for a vehicle seat comprises a stationary guide rail, a slide rail slidable along the guide rail forwardly and backwardly of the seat among several adjusting positions, and means locking the slide rail in one of the adjusting positions, so that the headrest is adjustable back and forth to comfortably adapt to the desired postures of a seat occupant.

Abstract: A jacket conduit which surrounds the exhaust gas at a portion equipped with an engine exhaust gas component sensor and is spaced from the exhaust gas conduit to define an air chamber on same and is formed with an air inlet opening which opens from the atmosphere into the air chamber for admitting atmospheric air thereinto and a flow control valve for controlling the ramming atmospheric air into the air chamber in accordance with the exhaust gas temperature and preferably one of the atmospheric temperature and the engine coolant temperature.

Abstract: A connector for terminating the end of a sheathed heating element is formed by an elongated body having a cavity at one end. The cavity includes at least one surface having a diameter dimension adapted to slidingly engage one of the diameter surfaces of the heating element sheath, and a thrubore, concentrically located with respect to the cavity diameter, adapted to slidingly engage the terminal pin of the heating element. The connector will mate with a heating element if and only if the heating element terminal pin is properly located with respect to the heating element sheath.

Abstract: A piston slidably received in a tubular housing is movable in response to the instantaneous flow of intake air to vary the number of small diameter tubes through which fuel can be jetted under the influence of a variable electrostatic force induced by the application of a variable high voltage across an electrode immersed in the fuel upstream of the nozzles and an electrode arranged about and spaced from the tubular housing.

Abstract: A nuclear reactor that burns hydrogen bomb material 6-lithium deuterotritide to helium in successive microexplosions which are ignited electrically and enclosed by this same molten material, and that permits the conversion of the reaction heat into useful electrical power. A specially-constructed high-current pulse machine is discharged via a thermally-preformed highly conducting path through a mass of the molten salt .sup.6 LiD.sub.1-x T.sub.x (0<x<1). In the resulting dense, hot plasma filament primary nucleons are formed by field-accelerated fusion collisions. These hot particles initiate suprathermal multistepped propagating fission-fusion avalanches that heat the plasma by their own released energy up to thermonuclear temperature. The plasma is confined inertially and magnetically. Neutrons escaping sideways are utilized to breed tritium in the surrounding liquid blanket material, for participation in the next pulse.

Abstract: A heating and cooling unit for installation in a building and including a pair of vertically extending risers extending for the length of a housing and adapted for connection to risers of corresponding units located on adjacent floors to form a continuous flow circuit for a heat exchange medium through all of the units. The housing is adapted to receive a reversible air conditioning unit and provides for connections between the unit and the risers. Heat exchange fins may be associated with the risers to form a riser heat exchanger. The air conditioning unit can be used in a standard cycle cooling mode or in a reverse cycle heating mode, and can be used in conjunction with, or independent of, the riser heat exchanger. A fan is provided in the housing to circulate air from the particular room, through the housing and back into the room.