Abstract: A stratified charge rotary combustion engine having at least two fuel nozzles for discharging fuel into each working chamber after the charge therein has been substantially compressed, the fuel discharging from one nozzle being ignited as it discharges into an engine working chamber and the combustion flame produced by this ignition functioning as a pilot flame to ignite fuel discharging from a second nozzle mounted on a side wall of the engine housing.

Abstract: A rotary trochoidal compressor comprising a rotor mounted for planetary motion within a housing and in which the peripheral surface of the compressor rotor is substantially a hypotrochoid and the peripheral inner surface of the housing is the outer envelope of the rotor and in which a compressible layer is provided on the inner surface of the rotor housing for sealing against the rotor peripheral surface.

Abstract: A rotary trochoidal compressor comprising a rotor mounted for planetary motion within a housing and in which the periphery of the rotor is substantially a hypotrochoid and the peripheral inner surface of the housing is the outer envelope of the rotor and in which a radially movable or elastic seal means is provided in the housing at the hypotrochoid generating points and the intake and outlet ports are so disposed in the housing on opposite sides of each hypotrochoid generating point such that each working chamber closes to an intake port before it opens to an outlet port, the working chamber being formed between the seal means at the rotor nose portions or between seal means at a rotor nose portion and at a hypotrochoid generating point.

Abstract: A rotary trochoidal compressor comprising a rotor mounted for planetary motion within a housing and in which the periphery of the compressor rotor is substantially a hypotrochoid and the peripheral inner surface of the housing is the outer envelope of the rotor and in which labyrinth seal means is provided between the rotor and housing.

Abstract: The sealing grid is for a rotary piston mechanism having a multi-profile rotor forming apex portions, which rotor is supported for planetary rotary movement in a housing cavity. The sealing grid comprises an apex seal assembly carried in each of the apex portions of the rotor, which assembly includes an apex seal blade. Also forming part of the sealing grid are apex seal pins disposed in the opposite side faces of the rotor and at each of the apex portions. The grid additionally includes side gas seal strips carried in each of the opposite side faces of the rotor. One end portion of each side gas seal strip is disposed in abutment against an apex seal blade at one apex portion while the opposite end portion engages the apex seal pin located at an adjacent apex portion. The grid further includes a biasing means for each side gas seal strip for urging the associated side gas seal strip in an endwise direction and into abutment against the apex seal blade associated therewith.

Abstract: The improved system for liquid cooling of a rotor of a rotary piston mechanism applies to those types having two housing walls spaced apart by a trochoidal shaped peripheral wall to define a multi-lobed cavity within which a multi-cornered rotor is eccentrically supported for planetary movement, and in which the rotor has a hub portion and peripheral wall portions defining therebetween cooling spaces which communicate with the area exteriorly of the rotor through an opening adjacent each end of the hub portion. The improved rotor cooling system comprises a cooling liquid discharge nozzle disposed in at least one of the housing walls and connecting the discharge nozzle to a source of pressurized cooling liquid. The discharge nozzle is positioned so as to direct emitted cooling liquid into the adjacent rotor opening and the cooling spaces in the rotor.

Abstract: The improved combination of a rotary internal combustion engine and spark plug provides a bore in the engine housing extending from the exterior of the housing into communication with the rotor cavity defined by the housing. The bore has a threaded portion to receive the threaded shank portion of the spark plug and an annular shoulder extending in a plane substantially normal to the longitudinal axis of the bore. The spark plug has a complementary annular shoulder portion extending in a plane substantially parallel to the plane of the shoulder of the bore. The shoulder portion of the spark plug is so located as to engage the shoulder of the bore to thereby position the spark gap end of the spark plug relative to the rotor cavity. An annular channel means is provided adjacent the shoulder of the bore to provide an annular space into which is placed a gasket to prevent fluid leakage through the interstices between the bore and spark plug.

Abstract: The gear train speed changing transmission for transmitting rotation from an input member to an output member comprises planet gears carried at the distal end portion of the input member for planetary rotation and connected together for conjoined rotation about their respective axes, at least one of the planet gears being in mesh with a reaction gear and at least one planet gear being in mesh with a gear carried by the output member. The transmission also includes a coil spring brake means disposed to coact with the reaction gear to selectively prevent or permit rotation of the gear.In a more limited aspect of the invention the transmission has two or more gear trains interconnecting the input member with the output member and wherein each train includes a reaction gear and a brake means for selecting which gear train rotary transmission is to be effected.

Abstract: A rotary diesel engine in which the engine has seal means providing sealing cooperation between each working face of the engine rotor and the engine housing in the region of a lobe junction of the multi-lobe profile of said housing so that during compression, each working chamber is divided by said seal means into leading and trailing portions with the compression of the intake charge of said chamber being substantially confined to its said trailing portion whereby each working chamber compresses its charge to a substantially greater degree than would be the case in the absence of said seal means.

Abstract: The multi-pass heat exchanger comprises an open-ended shell for receiving a first fluid and at least one tube bank disposed in the shell and connected to pass a second fluid in indirect heat transfer with the first fluid. The tube bank may comprise one or more conduits each of which are of polygonal configuration in cross-section and have spaced rows of fins extending from the large sized surfaces of the conduits. Each of the conduits is formed into a flattened helical configuration consisting of substantially straight portions so arranged that alternate straight portions extend in substantial parallelism and having return bend portions interconnecting end-to-end next adjacent straight portions so that series flow of second fluid is provided through the straight portions.

Abstract: The dual-fuel feed system for a gas turbine engine, having a plurality of fuel nozzles arranged to effect admixture of air and fuel in a combustor of the engine for combustion of fuel, comprises a fuel feed conduit means communicating with each of the fuel nozzles and separate sources of different fuels and flow control means for alternating flow of fuel from one source or the other to the fuel nozzles.

Abstract: The improved fuel injection system is for a rotary internal combustion engine having a housing within which a rotor is disposed for planetary rotary motion and which defines with the housing a plurality of combustion chambers. The improved fuel injection systems has a positive displacement fuel pump, such as of the plunger and barrel type, which is connected to deliver fuel to a fuel nozzle located to emit fuel into the combustion chambers upon actuation of the plunger. An actuating means, such as multi-profile cam is supported for rotation at a speed proportionate to rotor speed and disposed to effect reciprocative movement of the plunger.

Abstract: The lubrication system for rotary mechanisms of the Wankel type, having a housing in which a rotor planetates, comprises an elongated, shallow trough in the inner peripheral surface of the trochoid housing of the mechanism, which trough extends substantially across the entire width of the surface and with its longitudinal axis canted relative to the trace line of the inner peripheral surface. A supply means is provided to conduct metered amounts of lubricant to the trough from a suitable source of lubricant to fill and maintain the trough in a full condition so that the apex seal blade carried by the rotor picks-up and distributes lubricant along the inner peripheral surface.

Abstract: The normally engaged spring clutch assembly has a helical spring in interference fit with driving and driven clutch drums to transmit rotation from one clutch drum to the other. A control sleeve surrounds and is in close spaced relation to the spring. Each of the opposite end portions of the spring are engageable with the sleeve so that, in the engaged condition of operation, the sleeve rotates with the spring and, in the disengaged condition of operation when rotation of the control sleeve is arrested, the spring is caused to release its grip on a clutch drum. The disengagement of the spring clutch assembly is achieved whichever clutch drum is the driving clutch drum.In another embodiment, the spring is so formed that, upon disengagement by arresting rotation of the control sleeve, a portion of the spring engages the control sleeve to stop the overrun of the driven clutch drum.

Abstract: A rotary combustion engine comprising a housing having an inner trochoidal surface and a rotor mounted within the housing and having apex portions having sealing cooperation with said trochoidal surface to form a plurality of working chambers therebetween and in which said trochoidal surface is modified at least in the region at the ends of its minor axis by displacing said surface outwardly in this region to avoid the usual crest in each of these regions and further in which the rotor periphery is modified so that it is substantially the inner envelope of this modified trochoidal surface.

Abstract: A rotary combustion engine having a fuel nozzle for discharging fuel into each working chamber just prior to combustion and in which means are provided for increasing the width of the spray angle of the fuel discharged by said nozzle as the quantity of fuel discharged by the nozzle into each working chamber is increased.

Abstract: The built-up tube and tubesheet assembly for multi-conduit heat exchangers having a plurality of conduits each of which have end portions of four-sided polygonal shape in cross-section comprises a plurality of peripheral walls secured together to form a four-sided polygonal shaped frame and, at least, one partition wall connected at opposite ends to opposite peripheral walls to thereby form two openings shaped and dimensioned to receive therein the end portions of the conduits. A securing and sealing means is provided to connect the end portions of the conduits and the peripheral and partition walls together and seal the interstices between the surfaces of the end portions and the adjacent surfaces of the peripheral and partition walls. In the method of fabrication the securing and sealing means is provided by dip soldering or brazing within a molten solder bath.

Abstract: An internal combustion engine having an intake port with a valve movable to open and close the intake port and with the duration of the period in which the valve is fully open during each intake phase being varied to regulate the power output of the engine.

Abstract: A rotary combustion engine designed for operation as a stratified charge engine with two separately controllable fuel injection means combined into a single unitary fuel injection nozzle structure.

Abstract: Molding apparatus and method for producing die castings having high, closely spaced projections extending therefrom formed by mold portions which are re-entrant or interleaved between the projections of the casting. Such re-entrant mold portions do not cool rapidly between casting shots and their tips are liable to stick to the casting, making it difficult or impossible to release. The invention provides a die mold having such re-entrant portions and a method of rapidly cooling such portions between casting shots in order to provide acceptable production rates.