Abstract: A dual cycle turbine system is presented which includes a combination of two engines with different cycle pressure ratios. The two engines are cross connected by a common regenerator that enables low specific fuel consumption under partial load conditions.

Abstract: Electrolytic process and apparatus employs the shroud and depending blades as anodes about a multi-cathode device in a bond material solutionizing electrolyte for obtaining proper contour smoothness without structural depletion of the shroud and/or blades.

Abstract: A gas turbine engine is constructed having a forward differentially geared power output with an adjacent inlet for the introduction of airflow to the engine. After the airflow is compressed, it is discharged into an annular regenerator which is heated by exhaust gases. A reverse flow can-type combustor is located within the annular regenerator and receives the preheated air therefrom. The exhaust gas from the combustor is directed forward, first, to the power turbine and then to the gasifier turbine, after which it is exhausted through the regenerator.

Abstract: A heat suppressor for a gas turbine engine is mounted on an aircraft by means separate from the engine mounts. A sleeve apparatus is needed to connect the exhaust duct of the engine to the suppressor duct for continuous flow of turbine gases. The sleeve apparatus is in the form of a bellows to absorb bending forces created by flexing of the air frame. This invention provides a unique connecting assembly to connect the bellows to the engine. The assembly consists of an annular socket fixed to the bellows and constructed to receive a radially extending flange on a connecting shroud fixed to the engine. The flange and socket are slidably engaged to allow twisting movement between the bellows and the engine, while the bellows allows relative displacement of the axes of the connecting passages.

Abstract: A multiplicity of retractable spoilers are placed at spaced angular intervals within the annular duct which carries the bypass airstream in a turbofan engine. Deployment of the spoilers into the bypass annular duct causes a partial blockage of the airstream. This results in a decrease in thrust from the engine without any change in throttle setting.

Abstract: In order to provide a frangible projectile for use in aircraft target practice, a combination steel and plastic projectile is constructed. This unit consists of a steel cup into which a glass reinforced plastic ogive is injection molded. During the same injection molding process, a plastic rotating band is installed around the periphery of the projectile.

Abstract: An improved Waddington drive, employed here as a bicycle wheel hub, provides an automatically shifting transmission driven by an operator's foot pedal crank. A number of planet gears journaled for rotation in the hub engage and revolve around a fixed sungear on a mounting shaft thereby carrying and rotating the hub with them. The planet gears are connected through one-way clutches to cranks whose arms follow a cylindrical cam, the eccentricity of which is variable as a function of speed and torque. The cam is pivotally mounted from the rotating input shaft and its eccentricity is controlled by the reaction force between the cam and its followers, the centrifugal force on the cam, and a restoring force developed by a cantilever spring urging the cam to return to an initial eccentricity selectable to match the operator's capabilities. The centrifugal control force is developed by a flyweight integral with the cam and by a counterweight serving to dynamically balance the input shaft.

Abstract: An apparatus for and method of suppressing infrared radiation emitted from hot metal parts at the aft end of a gas turbine engine and from the exhaust gas plume thereof during engine operation is provided and comprises a multiple purpose ejector vane assembly operatively attached to the engine for introducing cooling ambient air into the hot engine exhaust gases and hiding the hot metal parts and means attaching the vane assembly to the engine with the vane assembly comprising a duct structure for receiving and confining the engine exhaust gases and a plurality of radial ejector vanes supported by the duct structure for introducing cooling ambient air into hot engine exhaust gases during engine operation by ejector action while simultaneously imparting a spiral swirl to both the cooling ambient air and the exhaust gases with the swirl promoting mixing of ambient air within the duct structure and causing additional entrainment of ambient air downstream of the duct structure.

Abstract: The torque transmitted through a pair of helical gears mounted on a lay shaft imposes an axial force on the lay shaft which is reflected into fluid pressure to indicate the magnitude of the torque. By journaling the lay shaft within sleeves which are also the inner races of a pair of roller bearings its axial movements are sensitively transmitted to a nonrotating piston rod mounted in ball bearings within the bore of the lay shaft. The piston is displaceable into a cylinder supplied with pressurized lubricating fluid through a valve responsive to the axial displacenent of the piston. The fluid pressure in the cylinder balances the axial force transmitted to the piston and is proportional to the transmitted torque.

Abstract: A carbon ring seal for a shaft rotating at high speed is capable of preventing high temperature, high pressure gas from entering the oil system. The carbon seal is constructed so that at ambient temperature it works as a controlled gap seal, but when the seal runner reaches its full thermal growth the seal then functions as a positive contact seal. The carbon seal ring is not pinned against rotation, but rotation is limited by means of an integral drag pad. The seal housing is provided with a plurality of calibrated holes for predetermined internal pressurization and cooling.

Abstract: This invention relates to a device for selectively actuating the workpiece clamp of an automatically controlled bar tacker sewing machine utilizing electrically operated pneumatic cylinders operatively connected to the upper clamping element to cause release of the workpiece. The clamp feet are releasably independent of other sewing operations. The upper clamping plate and the feed plate are secured to the clamp assembly by quick change fittings.

Abstract: The invention relates to a chain of modules constructed to sequentially dry plastic particles each module comprises a mixing chamber having a trough formed therein, the trough having side walls inclined to the horizontal and a slot extending along the bottom thereof. The slot is covered by a grating to permit passage of air into the mixing chamber but to prevent particulate material from falling out of the trough through the slot. A pressure chamber is constructed immediately below the trough in the body portion of the module and means, are provided for delivering air to the pressure chamber thereby causing a stream of air to be forced upward into the mixing chamber through the slot in the trough. Each module is tilted to provide a flow of plastic particles through the trough.

Abstract: This invention involves a pallet for use in automatic stitching machines which insures proper registration of a workpiece with respect to the stitching instruments and maintenance of such registration during machine operation. Basically, the pallet is constructed of two outer plates hinged together to form a sandwich type arrangement having openings therein to allow for access of the stitching instruments to the workpiece. These openings are generally identical and are accurately located with respect to the stitching instruments. In the interior of the pallet means are provided for removably securing the workpiece in accurate registration with the stitching instruments. The access openings may be designed to receive overlay or overlapping portions of a composite workpiece and additional outer or interior plates may be provided to accommodate a wide variety of workpieces.

Abstract: In order to convert a standard manually converted bar tacker type sewing machine to automatic numerical control an assembly is constructed which consists of a stepping motor drive system operatively connected to the work clamp positioning levers through gear sectors mounted on pivot arms. In this manner rotation of the stepping motors causes movement of the work clamp along two axes similar to the motion caused by a style cam. The style cam is therefore eliminated. Collateral functions such as nipping and thread cutting are initiated by the knife cam which is driven through a clutch by the cam shaft. In order to remove the restrictions caused by gear ratio and cam size and shape, the knife cam is engaged only for the first and last few stitches of the tack design. The control system, therefore, initiates and times the positioning of the work clamp, starting and stopping of the machine and engagement and disengagement of the knife cam.

Abstract: Four hydraulic cylinders are mounted on support segments at approximately 90.degree. intervals about the sealing gland ring of an internal rotary mixer. The piston rods of the hydraulic cylinders directly engage the gland ring and the cylinders are supplied by a static hydraulic system. The hydraulic system supplies a pair of cylinder assemblies on either end of the rotor shaft thereby providing a continuously balanced force to the gland rings.

Abstract: In a standard screen printing machine a linkage assembly is provided for connecting the screen support and the printing bed support in such a manner that the screen support is movable into and out of an operative position. The link arrangement is selectively connected to the screen support to provide, in the alternative, movement according to a parallel linkage arrangement or tilting movement about an axis of the linkage assembly.

Abstract: The subject invention involves a device for sensing the depth to which a worn railroad wheel must be machined in order to reclaim the wheel tread and flange contour. The device consists of an assembly of gaging elements mounted on a support block which is, in turn, mounted on a guide rail for radial movement into contact with the wheel tread. The gaging elements include a flange edge contactor slidably mounted on the support block, a tread contactor slidably mounted on the flange edge contactor, and a flange contacting finger pivotally mounted to the tread contactor. In operation the assembly is moved radially toward the wheel until the wheel tread is contacted. The tread contactor thereafter retracts, causing the flange contacting finger to engage the gaging point on the wheel flange. Further, downward movement of the assembly causes the flange edge contactor to move into engagement with the wheel.

Abstract: Method for controlling the parameters of injection molding processes in a machine having a barrel with a plasticating chamber and a screw, rotatably and slidably disposed in said chamber, hopper means adjacent one end of said chamber communicating therewith and nozzle means disposed in the other end of said chamber communicating with a mold. Control of the injection molding process is achieved through an event recognition philosophy by sensing screw position, screw injection velocity, melt temperature, comparing the values at certain instances during the work cycle with known or desired values and using these values, changes of values and differences of values to monitor and initiate changes in the process parameters.

Abstract: The subject invention involves apparatus for simultaneously actuating a plurality of piston and cylinder assemblies which are used to drive the movable platen of a cutting press. The instant press has a platen driven by four piston and cylinder assemblies, each assembly being connected to a source of pressurized fluid through an appropriate spool valve. The spool valves are actuated simultaneously by the movement of a pair of actuator bars which are interconnected for coordinated movement through bell cranks to a single piston and cylinder drive means.