Abstract: A fuel injection system for alternate fuels such as coal-water slurry comprises a conventional fuel injection pump for supplying timed and metered pulses of diesel fuel to an injector assembly. The injector assembly includes a shuttle piston in a cylinder which is connected at one end by an injection line to the pump and at the other end by a passage to an injection nozzle. The alternate fuel is introduced into the injector assembly passage under pressure through a check valve between injection intervals. A bleed passage in the pump delivery valve provides a rapid pressure decay in the injection line following injection, permitting the shuttle piston to return to its starting position under the influence of the alternate fuel pressure. The timed and metered injection pulses are transferred by the shuttle piston from the diesel fuel to the alternate fuel to open the injection nozzle and inject the alternate fuel into an engine cylinder.

Abstract: The inner end of a spray hole in a fuel injection nozzle for an internal injection engine is electrochemically machined by providing a negative electrode inside a chamber in said body, while applying an electrolyte under pressure to the exterior of the nozzle body, so as to cause the electrolyte to flow through the spray hole inwardly of said body. The electrolyte is preferably an aqueous solution of NaCl.

Abstract: An adjustable V-belt pulley which may be selectively changed form one predetermined effective diameter to another without tools. The pulley comprises first and second separable pulley halves having juxtaposed frusto-conical faces adapted to receive a V-belt pulley therebetween. A plurality of spaced lugs extend axially from the first pulley half and a plurality of sets of cavities are provided in the second pulley half, each set being adapted to receive the lugs of the first pulley half. Each cavity set has a different cavity depth so that the effective pulley diameter is established by the choice of the cavity set into which the lugs are inserted. The pulley halves are concentrically disposed on a shaft and are held together by a wing nut or knurled nut on the threaded shaft end which clamps the pulley halves against a shoulder of the shaft.

Abstract: A pontoon log is formed by welding the upper flanged edges of a U-shaped hull member to the side edges of a flat top plate. At points at which the deck beams are to be attached to the log, the log top plate is notched and the weld is continued around the perimeter of each notch. The deck beams are bolted to the pontoon log with the bolts passing only through the hull flange in the region of the notches and hence outboard of the weld line. The modified embodiments, various types of spacers and clips are provided to reinforce the hull flange in the region of deck beam attachment.

Abstract: A combined terminal secondary lock and seal for securing a terminal within a connector cavity in sealed relation comprises a sleeve surrounding the end of the wire and a portion of the terminal and abutting against the widened terminal contact portion. The sleeve includes a plurality of apertures adjacent the insulated portion of the wire, which apertures define a plurality of axially aligned spaced slats sufficient to provide axial rigidity to the sleeve. A resilient seal ring is integrally molded into the apertures and extends outwardly into circumferential sealing engagement with a cavity of the connector and inwardly into circumferential sealing engagement with an insulated portion of the wire. A sleeve retainer is provided on the connector for securing the sleeve and terminal against axial movement.

Abstract: A multi-conductor terminal is disclosed which connects a plurality of discrete electrical connectors without the need for stripping insulation from the conductors.

Abstract: A rope guide for the recoil starter rope of a power lawn mower, said rope guide being adapted for attachment to an extruded mower handle member having a substantially C-shaped configuration without drilling, cutting or otherwise deforming the handle member. The guide comprises a tubular body portion having an inner configuration in substantial conformity with the outer configuration of the handle member and adapted to receive the handle member therewithin in close fitting, sliding relation. The body portion is attached to the handle member by means of a screw passing through a bore in the body portion, through the opening in the handle member and into a threaded plate within the handle member spanning the opening therein. An arm portion extending outwardly from the body portion includes an aperture therein for receiving and guiding the mower starter rope.

Abstract: The invention provides means for controlling the rate of fuel injection of an accumulator injector of the type employing a pressure amplifying piston assembly. In one form of the invention, the injection rate is controlled by restricting the pressure decay in the amplifier chamber. In another form of the invention, means are provided for delaying the full opening of the injector valve needle after an initial valve opening.

Abstract: Apparatus and a method for effecting fuel viscosity/density compensation are disclosed. A combination of fuel flow through a viscosity sensitive annular orifice and a swirl-type orifice are utilized to create pressure differentials for driving a piston for regulating fuel flow. The components are positioned such that the direct variation of pressure drop across the annular flow orifice with viscosity change and the inverse variation of pressure drop across the swirl orifice with viscosity change, are combined to create an increased force for achieving the desired control effect.

Abstract: A pressure and attitude responsive valve comprises a resilient substantially cylindrical hollow valve body having an opening in one end to receive a pressurized fluid to be regulated. The opposite valve body end is closed by a frusto-conical end wall having a central opening therein. A valve ball, larger than the opening but smaller than the valve body bore, is disposed within the valve body to open or close the opening depending on the attitude of the valve body. Longitudinal slits in the wall of the valve body permit resilient deformation of the wall and an opening of the slits upon occurrence of a predetermined pressure gradient. The valve is disposed in a valve housing in series with a check valve to comprise a shunt valve assembly for treatment of hydrocephalus.

Abstract: First and a second rotating members are driven in syntony with each other but at variable advance angles with respect to each other. A sensor (32) provides a position signal indicative of a predetermined rotational position of the first rotating member. A toothed wheel (40) is fixed to the second rotating member and a sensor (44) adjacent to the wheel provides a pulse indicative of each occurrence of tooth (42)/sensor (44) juxtaposition. The speed of the rotating members is determined by the pulse frequency or the time interval between the pulses. The advance angle is determined by measuring the time interval between the position signal and a particular pulse, such as the one immediately after the position signal, and multiplying the result by the determined speed.

Abstract: A walk-behind turf aerating apparatus includes two pairs of tine arm assemblies, each assembly having a pair of vertically reciprocating tine arms for driving coring tines into the turf. A tine arm return mechanism includes a gear box for each pair of tine arms, the lower ends of the tine arms being connected to cranks extending from the gear box to reposition the tine arms prior to ground engagement. Stops are provided to limit the tine arm travel. A spring-loaded lifting mechanism permits manual shifting of the tine arm mechanism from a lowered ground-engaging position to a raised transport position. A belt drive with clutch and reduction drive for the wheels also drives the tine arm mechanism with automatic disengagement when the wheels are in the transport position. A handle assembly is connected to the apparatus frame through a pivotal connection including vibration damping elements for minimizing transmittal of vibrations, particularly in the vertical plane, to the handle.

Abstract: An arrangement for providing access to the seal rings of a seatless high pressure valve includes an aperture in the valve body and a demountable sealed closure for the aperture. The sleeve within the valve body for transmitting the gland force to the seal rings is made in segments small enough for removal through the aperture to permit access to the seal rings. The valve seal rings may accordingly be replaced without disassembly of the major valve components including the valve plunger and gland.

Abstract: In a fuel injection system having a stepper motor (40) positioning the pump rack (32) in the fuel injection pump (18) to control the end of injection, a preloaded, compliant linkage (52,54,56) is interposed between the stepper motor output pinion gear (48) and the pump rack (32) to prevent a phase shift between the actual and the desired stepper motor position. The preload of the linkage (52,54,56) is set at greater than the normal operating load and less than the stepper motor output. The linkage includes a rack member (52) that is urged by a spring-loaded mechanism (76) against the output pinion (48) of the stepper motor (40) to maintain tooth engagement, and a clevis member (56) that is pivoted to allow the rack member to move away from the pinion in the event of a pump rack load of extremely high (tooth-damaging) magnitude. A closed throttle position is assured by a spring (99) urging the single-acting linkage against a stop (98).

Abstract: A slide control assembly includes a detent mechanism for providing a series of spaced set positions for the controlled device. The control setting can be changed only by first cocking the control lever in the direction of intended control movement to release the detent mechanism. An audible signal is produced by the detent mechanism to permit the operator to accurately gauge the movement of the control.

Abstract: A system for controlling delivery of fuel to a compression ignition engine having a predetermined characteristic ignition delay. A positive-displacement pump, typically a high-pressure, multiplunger in-line pump, receives fuel from a source and provides intermittent, pressurized pulses of fuel flow. A conduit extends from a pumping chamber to a node to which a normally-closed fuel injector is operatively connected. A normally-open, solenoid-controlled bypass valve has an inlet port connected to the conduit node for allowing fuel to bypass the injector. When a signal is applied to the bypass valve it rapidly closes, causing the pressure at the injector to rapidly increase to a first injector-opening level to inject pilot fuel. Thereafter, following a predetermined hydraulic delay, the pressure at the injector rapidly increases to a second level greater than the first to provide main fuel injection.

Abstract: A wrist pin lubricating system for a multi-cylinder two-cycle engine comprises a passage system for collecting and distributing crankcase condensate to the piston wrist pin bearings. A slot in each piston skirt provides continuous communication between each wrist pin bearing and a passage in the cylinder wall delivering condensate from the engine crankcases. The condensate is collected at the low point of each crankcase and is pumped to the wrist pin bearings by the pressure differential between two crankcases. Check valves are provided in the passages to maintain a directional flow of the condensate.

Abstract: A stepper motor (40) is used to position the pump rack (32A) via a preloaded compliant linkage (52,54,56) in a fuel injection pump (18), thereby exercising control over the end of injection event in response to various engine operating parameters. One part (52) of the compliant linkage (52,54,56) is engaged with the output shaft (46) of the stepper motor (40). The stop (96) is provided at the zero throttle position of the engaged part (52) of the linkage (52,54,56), at the exteme distal end of its positional range. A position sensor (100) is located at a predetermined reference position away from the stop (96) to provide a signal indicative of the engaged part (52) being at that position. When the stepper motor (40) is advanced to move the engaged part (52) away from the stop (96), the pulse count to the stepper motor is rereferenced when the reference position is reached.