Abstract: The system includes a hydraulic surface actuator for operating a piston coupled to a structural member of an aircraft for moving the structural member. An electrical feedback sensor is coupled to the actuator piston rod. A summing circuit for receiving a command signal and the feedback signal is provided having an output which is coupled to a loop gain compensator for operating a servo motor. The shaft of the servo motor drives the shaft of a variable displacement pump having ports leading to the ports of the actuator. The variable displacement pump has a swash plate the angle of which is reduced by a hinge moment sensor and a de-stroking actuator when the load on the surface actuator exceeds a given percentage of maximum. A pump gain sensor measures the reduction in pump gain and produces an electrical output which is applied to the loop gain compensator to compensate for reduction in pump gain.

Abstract: The weight has a sound chamber and a tail section. The sound chamber embodies a plunger stem, a plunger seat, a flexible reed or spring biased balls and a compression spring. The tail section embodies a tail canal and an amplifier which forms a venture having a vortex and a vertex intersecting the tail canal. The sound is made when the plunger stem is pulled, the flexible reed or spring biased balls mounted in the plunger seat deflects the sound chamber grooves of the sound chamber. The plunger stem reaches it's maximum travel when the plunger seat reaches the spring seat. The compression spring retracts the plunger stem when the pull is released. The spring's retraction allows the flexible reed or spring biased balls on the plunger set to deflect the sound grooves in the opposite direction until the plunger seats meets the tail seat. The sound induced in the sound chamber is transferred to the tail canal where it is amplified through the vortex and vertex making an amplifier.

Abstract: The apparatus includes a motor with a shaft for rotating a fan. A retaining ring and a thrust washer are located around the shaft on one side of the hub of the fan and a torque washer is located on the outer side of the hub with the end of the shaft extending through a central aperture of the torque washer. The retaining ring supports the thrust washer and the thrust washer engages and supports the hub of the fan. The aperture of the torque washer and the side of the shaft at the end thereof have planar surfaces which engage each other which prevents rotation between the torque washer and the shaft. Bosses are formed on the outer side of the hub which fit into apertures formed through the torque washer outward of the central aperture to transfer torque radially outward to the hub. A screw has a threaded shaft extending through the central aperture of the torque washer and which is screwed into a threaded aperture formed in the end of the motor shaft to tighten the torque washer to the hub.

Abstract: The apparatus of the invention is used for severing a metal conduit disposed in a borehole extending downward into the earth. The apparatus includes a body adapted to be lowered into the metal conduit to be severed. The body is formed by a surrounding wall defining an elongated chamber with a central axis and having a lower portion, an intermediate portion, and an upper portion. The lower portion defines a cavity with a plurality of apertures extending through the wall in a given plane at angularly spaced apart positions located 360° around the axis for providing passages from said cavity to the outside of the wall. A combustible charge is located in the intermediate portion, and a movable seal member is located in the cavity above the apertures and below the combustible charge.

Abstract: An elongated guide member is supported by a support system over a bed. The guide member has an elongated cavity with a slot formed in its lower wall leading to the cavity. The slot has a plurality of spaced apart enlarged openings along its length. A plunger is provided which has a first portion located in the cavity and a second portion extending through the slot for movement along the length of the cavity and slot. Biasing means is provided for normally urging the first portion of the plunger toward the upper side of the cavity to normally maintain the first portion of the plunger in the cavity.

Abstract: The catalyst of the invention includes Aluminium, Lead, Copper, Tin, Antimony, Zinc and Nickel located to be in contact with the fuel to be burned. Each of the elements is present in a preferred concentration range by weight which varies depending on the type of fuel. In a preferred embodiment, the Aluminium forms a container having an inlet and an outlet which defines a flow path through which the fuel flows. The other elements are located in the flow path such that all of the elements are in contact with the fuel as it flows through the container.

Abstract: The oven comprises a housing and a ceramic support member located in the housing for supporting food to be cooked. A lower electrical heating element is located below the support member. Two laterally spaced apart upper electrical heating elements are supported above the support member and the food to be cooked. An electrical system is provided for supplying electrical power to the lower electrical heating element and to the two upper electrical heating elements. A control unit is provided for controlling electrical power applied to the lower heating element and to the two upper electrical heating elements to allow electrical power to be applied to each of the two upper electrical heating elements simultaneous or separately.

Abstract: The compression refrigeration unit includes a compressor, a gas refrigeration unit, an expansion apparatus, and an evaporator, which are connected to one another in a circulation system, which contains a coolant, characterized in that the degree of filling of the coolant is between 50% and 100% of the critical density of the coolant. Preferably the coolant is carbon dioxide and the degree of filling of the carbon dioxide coolant is between 0.25 and 0.45 kg/L. Also provided, in another embodiment, is an intermediate heat exchanger with a first heat exchanger branch and a second heat exchanger branch, connected to the first heat exchanger branch by a thermic coupling, wherein the first heat exchanger branch is connected to the gas refrigeration unit and the expansion apparatus and the second heat exchanger branch are connected to the evaporator and the compressor.

Abstract: The apparatus, in one embodiment has guide housing with a shaft extending through the guide housing with a drill bit coupled to its forward end. The shaft may be moved to a forward drilling position or to a rearward shifting position relative to the guide housing. A cam is located inside of the guide housing. A cam follower is coupled to the shaft. In the shifting mode, the cam follower is disengaged from the cam. A clutch is provided for coupling the cam to the shaft when the shaft is in the shifting position such that the cam follower may be rotated with the shaft relative to the cam to allow the cam follower to engage the cam when the shaft is moved to the forward drilling position. In the forward drilling position of the shaft, the clutch release the cam from the shaft and the cam follower engages the cam to allow straight drilling to occur or to cause the axis of said guide housing to shift relative to the axis of the shaft to cause the direction of drilling by the shaft and drill bit to change.

Abstract: The pump is formed by pump housing defining a pump housing cavity and a column housing defining an elongated cavity. The front of the column housing is coupled to the rear of the pump housing cavity. A shaft axially from the rear of the column housing cavity into the pump housing cavity. An impeller is connected to the front of the shaft for rotation in the pump housing cavity for moving liquid from the front inlet through an outlet transverse to the axis. The impeller has vanes on its front and rear sides. A baffle is fixedly secured to the front of the column housing around the shaft and has vanes on its rear side for preventing liquid rearward of the baffle in the column housing cavity from rotating.

Abstract: The reed employs two spaced apart cylinders with slots in their outer surfaces. The slots extend around the axis of each cylinder a given distance. The slots of each cylinder flare out from each other from one edge to an opposite edge. Dents are supported for movement between the two cylinders and have guides located in the slots of each cylinder. The two cylinders can be rotated together in one direction or in an opposite direction for causing the slots to move the guides and hence the dents apart or together to obtain changes in the width of the fabric along the warp direction. This change in width will cause the warp density to vary along the length of the fabric while maintaining continuous warp yarn. This feature also allows warp strands of different cross-section to be woven.

Abstract: The cleaning system includes a portable water tank, pump, and nozzle member for cleaning air conditioning coils with water at a high volume and low pressure. In the preferred embodiment the system is to be operated to spray water within a range of about 15 to 46 gallons per minute at a pressure of about 350 to 850 psi.

Abstract: The apparatus includes a battery support for supporting a battery at a fill position, a head assembly with a plurality of heads each with an opening formed therethrough, an acid tank, a circulating conduit with a pump for circulating acid, and a valve for stopping the circulation of acid. The head assembly is moved from an upper position to a lower position for engaging the head openings with the upper cell openings of the battery. A plurality of fill conduits extend from the circulating conduit between the pump and the valve to the heads for injecting acid into the battery openings by way of the head openings. A plurality of leveling tubes extend through the head openings and beyond the lower ends of the heads for with removing excess acid by way of a plurality of leveling chambers operated together with a piston.

Abstract: In one embodiment, the apparatus has two planar anterior surfaces, and two posterior planar surfaces located such that the two anterior surfaces are at the front of the apparatus and the two posterior surfaces are at the rear of the apparatus. Opposite anterior and posterior surfaces flare outward and downward relative to each other at angles of about 20 degrees. As seen from an upper plan view of the apparatus, adjacent surfaces form an angle of 90 degrees. A cavity is formed in the apparatus from the lower end for receiving a person's head with the anterior surfaces being located at the front of the person's head and the posterior surfaces being located at the rear of the person's head.

Abstract: Rectangular shaped members are provided for covering the gaps formed at the rear of a pickup truck and as seen in the rear wheel wells between the frame and side walls of the rear bed. Each of the rectangular shaped members has two elongated edges and two shorter edges with apertures formed therethrough near one of the elongated edges for receiving fastening means for attaching the rectangular shaped members to the side wall of the wheel well or to the frame on each of the sides of the pickup truck for covering the gap.

Abstract: A toilet odor removal system which uses an overflow tube in the water tank and a float valve to open and close an opening in the overflow tube for water overflow purposes and for odor removal purposes respectively. The overflow tube extends through a side wall of the water tank to an exhaust system.

Abstract: The apparatus includes an electrical circuit for producing a high voltage at a high frequency with very little current and an elongated and electrically insulated electrical conductive member coupled to the circuit for producing an electrical discharge when in close proximity to a metal object in the ground. The electrical circuit is capable of producing 50,000 volts and higher. In using the apparatus, the electrical conductive member may be moved to scan the ground over a metal object to obtain an image of the shape of the metal object.

Abstract: The canopy has a front and rear frame coupled to a top frame such that the lower edges of the front and rear frames are forward and rearward respectively of the top frame. The front frame has an upper window pane coupled thereto and a lower window pane having its upper edge pivotally coupled to the front frame. A window pane also is provided for the rear frame. Two pairs of flexible windows are provided for the two sides of the canopy. Two seat belt members are connected to the rear frame.

Abstract: A plurality of retention clips are employed in a DC motor for holding permanent magnets at spaced apart positions in the housing against its annular side wall. The DC motor is of the type having a housing formed by end walls secured to the annular side wall by attaching rods which extend between the end walls inside the annular side wall and are located radially outward of the armature. Each of the retention clips is formed by a thin spring member having two spaced apart clip ends for engaging adjacent ends of two permanent magnets with the spring member extending from one of the clip ends to the other of the clip ends to successively form a first outwardly extending partially open loop, an intermediate inwardly extending partially open loop, and a second outwardly extending partially open loop with the first and second partially open loops having entrances on an inner side of the spring member and the intermediate partially open loop having an entrance on an outer side opposite the inner side.