Abstract: A control system is provided for a combine or other vehicle having an engine for driving both the ground wheels of the vehicle and at least one auxiliary mechanism, such as the crop-processing mechanisms of a combine. The engine is coupled to the ground wheels through a hydrostatic transmission, and the power takeoff for the auxiliary mechanism is located on the engine side of the transmission. A speed droop governor regulates the fuel input to the engine in response to changes in the engine speed. Transmission control means adjusts the setting of the hydrostatic transmission, and thus the load applied to the engine via the transmission, in response to changes in engine speed or another parameter that varies with engine load so as to control the speed changes effected by the droop governor.

Abstract: An extracting screw apparatus comprises a hydraulic control which operates during starting of the extracting screw after a period of nonuse. The hydraulic control comprises a double-acting hydraulic actuator having a piston rod connected to an intermittent drive such as an overrunning clutch for rotating a driving shaft for the extracting screw about its axis. The intermittent drive converts linear reciprocating movement transmitted by the hydraulic actuator into intermittent angular movement. A hydraulic motor alone insures rotation of the extracting screw about its axis after starting and also insures the sweep movement of the extracting screw about a vertical axis. A hydraulic control circuit connected between a line running from a pump to the hydraulic motor for cutting off hydraulic fluid to the double-acting hydraulic actuator after normal operating torque is reached.

Abstract: An electrohydraulic control system which includes first and second electrically controlled fully variable hydraulic pumps adapted to be driven by the vehicle engine. In the specific embodiment of the invention herein disclosed, the first pump is coupled to the steering and braking control valves, and the second pump is coupled to the bucket and hoist control valves. An electrically controlled poppet valve selectively interconnects the respective pump outputs. Operator-responsive controllers, namely a bucket/hoist joy-stick controller, a vehicle propulsion controller and a steering controller, provide associated electrical signals as respective functions of operator demand. Electrically operated valves control application of hydraulic fluid to the bucket and hoist drive mechanisms, and pressure and position sensors are connected to such valves and actuating mechanisms.

Abstract: An enlarged funnel is releasably mounted at the open end of a length of cladding by an encircling length of shrink tubing which securely engages outer surfaces of both the funnel and cladding. The shrink tubing overlaps an annular shoulder against which pulling force can be exerted to remove the tubing from the cladding. The shoulder can be provided on a separate collar or ring, or on the funnel itself.

Abstract: A single-ring magnetic cusp low gas pressure ion source designed for use in a sealed, nonpumped neutron generator utilizes a cathode and an anode, three electrically floating electrodes (a reflector behind the cathode, a heat shield around the anode, and an aperture plate), together with a single ring-cusp magnetic field, to establish and energy-filtering mechanism for producing atomic-hydrogen ions.

Abstract: A rotating servomotor apparatus for use in rotating guide vanes in a hydraulic machine, wherein for the purpose of suppressing occurrence of flow-induced vibrations, there is provided a bearing to support wicket gates, a rotating servomotor which includes a movable spindle projecting in the axial direction and which has a plurality of movable partition members, a cylinder having a plurality of stationary partition members disposed around the spindle, and a plurality of compartments partitioned between the movable partition members and the stationary partition members; and a first distributing valve connected to one side of plural compartments within the cylinder of the rotating servomotor means, a second distributing valve connected to the other side of plural compartments within the cylinder of the rotating servomotor means, wherein the respective distributing valves have valve piston members sized and arrangeable with respect to fluid inlets and outlets to define a neutral position in which fluid is supplie

Abstract: A cylinder (3) is positioned to rotate on a fixed axle (1) in such a way that several leakproof chambers (3B, 3D) are formed: a second, longer cylinder (4) is positioned to slide along the first (3) and to turn on the fixed axle (1) in such a way that several leakproof chambers are formed (4A, 4B). Communicating pressurized fluids into the various chambers makes the cylinders (3, 4) turn a distance proportionate to a value x, and can make the second cylinder move axially along the first cylinder a distance proportionate to another value y; these values x and y being derived from several variables and sensors (10a to 10d) "read" the surface contours of the second cylinder (4), representing, for example, a function f (x,y).

Abstract: A vacuum actuator having a vacuum chamber and an atmospheric chamber separated from each other by means of a diaphragm, and an actuator rod connected at its one end to the diaphragm and extending across the atmospheric chamber to the outside of the actuator so as to be connected to an object to be actuated. An annular solenoid coil is mounted on the upper surface of the upper wall of the case defining the vacuum chamber, in such a manner that the axis of the solenoid coil extends substantially at a right angle to the axis of the actuator rod. A plunger disposed in the annular solenoid coil is adapted to be moved in one and the other directions along the axis of the annular solenoid coil. The end of the plunger is adapted to be moved into and out of a valve case in which is defined a control pressure chamber.

Abstract: A closed center four-way poppet actuator control device is incorporated into a pneumatic actuation system for controlling the movement of flight surfaces. The closed center four-way poppet actuator control device has a housing, a pair of two-way poppet valves in the housing, a rocker arm assembly mounted on the housing and connected to the pair of two-way poppet valves, and a diaphragm assembly also mounted in the housing and in contact with the two-way valves. A torque motor-driver assembly connected to the diaphragm assembly actuates the two-way valves as determined by control signals. The rocker arm causes the two-way valves to function oppositely each other: one allows high pressure gas to be input to a lobe motor actuator while the other allows gas to be output from the lobe motor actuator. Each two-way valve has a cylindrical poppet valve for inletting the gas to the actuator and a disk poppet valve for outputting the gas from the actuator to a vent.

Abstract: A meter-out load sensing hydraulic system controlling one or more motors, supplied by a variable displacement pump through a directional control valve. The compensating means of the pump senses pressure and flow on the discharge or return side of the motor to determine the pump cam plate position. The signal line connecting this discharge side of the motor to the compensating means is also supplied with a low pressure signal flow which causes the pump to standby at a low pressure level in a neutral valve position or when metering down a gravity load.

Abstract: This invention relates to a pump arrangement (54) for use in a linear fluid operated device having a reciprocating piston (14) separating a first active fluid chamber (30) and a second chamber (32) which eliminates the problem associated with fluid leakage buildup developing in the second chamber. The pump arrangement (54) is connected to the reciprocating piston (14) and pumps leakage fluid present in the second chamber (32) from the second chamber (32) and into the first chamber (30) in response to a force of a preselected minimum magnitude being applied to the pump arrangement (54). Thus, the problems of inefficient linear fluid operated device operation, reduced piston stroke length, external fluid leakage, and erratic piston travel speed are eliminated. The pump arrangement (54) is particularly suited for use in a single acting linear hydraulic jack (12) such as used on a material handling vehicle.

Abstract: A piston head structure in which a piston head made of a ceramic is firmly secured to the top portion of a metallic piston body through the medium of a metallic ring fitted to the lower part of the piston head. In assembling, the ceramic piston head to which the metallic ring is fitted beforehand is secured to the top portion of the piston body by a shrink fit or, alternatively, the assembly of the ceramic piston head and the metallic ring is inserted to the metallic material of the piston body during casting of the latter, and the cast piston body is then subjected to necessary mechanical processing. In this structure, the separation of the piston head from the piston body is prevented due to the close fit of the ceramic piston head and the metallic ring to the metallic piston body. Such a fit prevents separation even when the piston body is expanded due to the heat generated during operation of the engine.

Abstract: A fluid pressure actuator includes a lock mechanism for locking the actuator against movement in one end position, and an external lock release lever engageable with an external extension of the lock mechanism for releasing same. The lock release lever is engageable by a lock piston upon application of system pressure thereto to release the lock mechanism. During movement of the lock piston in the unlocking direction, and after disengagement of the lock mechanism, system pressure is ported through the lock piston both to the extend side of the actuator and the opposite end of the lock piston. By using substantially the same size seals on the opposite pressurized side of the lock piston and external extension of the lock mechanism, any effect of fluid pressure acting on such external extension of the lock mechanism is substantially negated.