Abstract: A redundant control actuation system for an aircraft including an electro-mechanically controlled, hydraulically powered actuator for driving a main control valve of a servo-actuator control system. The actuator includes a tandem piston connected to the main control valve and a force motor driven tandem pilot valve axially movable in the piston for simultaneously controlling the differential application of fluid pressure from respective hydraulic systems on opposed pressure surfaces of respective piston sections to cause movement of the piston in response to relative axial movement of the pilot valve as long as at least one hydraulic system remains operative. The piston pressure surfaces are sized and arranged to minimize force unbalance on the piston due to pressure variations in the hydraulic systems. Also, a pilot valve centering spring device may be provided to minimize undesirable transient motions during system turn on and shut down.

Abstract: A control apparatus provides for automatic programmed sequencing of pressure bumps at precisely determined pressures in a molding press and optionally provides for full pressure or low pressure cure at the conclusion of the bumping operation. The control apparatus comprises a press pressure monitor that measures press clamp pressure and produces an output signal indicative of the measured press pressure, and a control circuit that compares the output signal with a program selected one of a number of reference signals respectively indicative of bump pressures at which a bump may be desired and directs the press to perform a bump upon a predetermined relationship between the output signal and reference signal, such being indicative of the attainment of the bump pressure indicated by the then selected reference signal. Upon completion of the bumping operation, either full or low pressure cure may be effected.

Abstract: A feed-in mechanism for feeding strip material in helical fashion into an accumulator while preventing any bending or bowing of the incoming strip material by maintaining the strip material in the helix under tension. The feed-in mechanism includes a plurality of circumferentially spaced, helically arranged strip guides which define a helical path for the incoming strip, and a traction feed and tensioning device respectively located at the entry and exit ends of the helical path. The traction feed pushes the strip material along the helical path while the tensioning device exerts a pulling force on the strip material to maintain the strip material in the helix under tension. The traction feed includes a stationary idler roller and a powered traction roller journaled in a pivoting frame.

Abstract: The invention relates to new chemical compounds corresponding to the following formula ##STR1## in which R is a non-hydrolyzable radical and Az represents aziridinyl ##STR2## These compounds may be used as medicaments.

Abstract: A foam extrusion apparatus and method in which extrudate is extruded into a sealed chamber which may be subjected to pressure variation such as a vacuum with the controlled shaping of the plastic being obtained by power driven rolls within the chamber downstream of the die. Because of the harsh environmental conditions within the chamber it is desirable that the shaping or forming rolls be driven by an externally powered source which will therefore be not subject to the pressure, vacuum, or other deliterious conditions found within the chamber. Moreover, because of the external position of the drive with regard to the chamber, the entire system need not then be shut down in order to open the chamber and make the required adjustments or repairs. The chamber is preferably the upper end of a barometric leg into which the extrudate passes. The upper end of the chamber is closed by one or more bulkheads which are movable toward and away from the upper end of the chamber.

Abstract: An improved method for generating gas from coal including caking and high sulfur coals, in a completely enclosed system wherein no oxygen or air is used to burn a portion of the coal and/or char to produce heat for the reaction. The heat for the reaction of the instant invention is produced by electric induction coils surrounding a vertical retort which possesses a plurality of compartments or cells whose walls are heated by induction. Energy requirement is reduced by pressurizing and methanating within the compartments in order to benefit from exothermic reaction of the methane formation. The coal charged is heated by said walls so that the coal is converted from coal to coke or char by driving the volatiles from the coal in a controlled and efficient manner. The char is further kept hot by the same heated walls of said compartments and also by direct induction to make possible the generation of gas, mainly CO and H.sub.2 by reacting steam with said hot char.

Abstract: Synchronous demodulation using a lock in amplifier technique improves substantially the signal to noise ratio in a conveyor belt rip detector. The lock in amplifier technique uses an analog multiplier to form a product of a received AC transmitter signal, i.e. that received by the rip detector receiver from an antenna carried by the conveyor belt, and an AC reference signal, which has the same frequency as the transmitted AC transmitter signal, i.e. that transmitted by the rip detector transmitter. A shift in the phase of the AC transmitter signal as it is coupled from the transmitter to the receiver requires a corresponding shift in the phase of the AC reference signal so that the latter is tuned to the same phase as that of the received AC transmitter signal.The invention lends itself to computer control and self diagnosis of faults of the overall rip detector system.

Abstract: A tire building machine of the bead set, ply down, and dual bladder turn-up type includes a bladder clamping system which may be used greatly to broaden the size range capability of existing tire building machines without affecting or replacing a substantial portion of the bladder clamping system or adjacent machinery such as the ply down assembly. Thus, by maintaining an inventory of a reduced number of parts, a machine may more easily be converted to manufacture sizes of tires beyond its standard. This is accomplished by changing the configuration in clamping rings and front nose of the outer bladder only.

Abstract: A lined hose has a hot melt adhesive bond between the thermoplastic liner and the outer thermoplastic fabric casing. The method of making this lined hose assembly includes the steps of extruding a tubular thermoplastic liner, applying hot melt adhesive to the liner, cooling and flattening the liner with adhesive, inserting the liner with adhesive into a hose casing, and bonding the liner to the thermoplastic casing by applying heat to melt and activate the adhesive and pressure to form the adhesive bond.

Abstract: A bowl mop for use in cleaning toilet bowls and the like including a disposable yarn head having a slide portion slidably received in a slot on a projecting end portion of a handle. The slide is releasably retained within the slot as by engagement of a cam projection on the slide in a recess in the handle end portion to permit the disposable yarn head to be snapped off for easy disposal and replaced with a replacement head. The handle end portion extends at an angle relative to the longitudinal axis of the handle to facilitate cleaning of difficult to reach areas. Also, the handle is adjustable to different lengths for safer, faster cleaning with less bending and stooping and less operator fatigue.

Abstract: An electrical survey of buried structures such as underwater or underground pipelines utilizes the steps of connecting one end of an economically disposable wire from a wire supply to the structure, either directly or through a heavier lead, the opposite end being electrically connected to a cell. The cell is moved along the structure together with a wire supply and a meter to obtain periodic measured structure-to-electrolyte potential values. If the wire is accidentally or intentionally disconnected during the survey, a stationary electrode is positioned at the wire break or last valid measured reading, such electrode being reconnected to the free end of the wire from the supply. The survey then continues periodically obtaining electrode-to-cell potential values. A structure-to-electrolyte potential profile is obtained by summing the last valid recorded structure-to-electrolyte potential value with each electrode-to-cell values. The summing may be done after the survey is completed by computer.

Abstract: An electro-mechanical direct drive valve servo system for an aircraft including a drive mechanism that couples the rotary output motion of a rotary force motor to linear motion at a sliding-type valve. The drive mechanism includes a pair of axially spaced rotary members connected to the force motor and a wobble member journaled between and canted by the rotary members with axial thrust bearings interposed between axially aligned opposed planar faces of the rotary and wobble members. A radial output arm on the wobble member is connected to the valve and is constrained for arcuate nutating movement whereby controlled rotation of the rotary member effects nutating movement of the wobble member and output arm which movement effects controlled linear movement of the valve. Additional control inputs such as braking and recentering function inputs are accommodated by the drive mechanism at its input end to take advantage of the mechanism's inherent gearing force ratio.

Abstract: An improved method and apparatus for making metallic iron from iron ore including low-grade ore by the use of a solid reductant such as coal in a completely enclosed system wherein the heat for reduction originates from induction coils surrounding a vertical retort, said retort possesses compartments made of steel walls, which walls are heated by induction. The charge material made up of ore and coal are pre-mixed and charged into said compartments at the top of the retort and the iron ore is reduced while descending within said compartments so that when the charged materials reach the bottom of said compartments, the iron ore is metallized to elemental iron. A discharge means removes sections of the metallized iron from said shaft at a temperature of around 1,800.degree. and is fed into a mixer for liquification, desulfurization, and deganguing.

Abstract: A fluid actuator including a lock mechanism for locking the actuator against movement in one position and a fluid operated sequence-power valve which when actuated by fluid pressure releases the lock mechanism and then ports such fluid pressure directly to the actuator to cause movement thereof in the desired direction following release of the lock mechanism.

Abstract: Actuator includes a lock mechanism for locking the actuator against movement in one end position, and a separate lock release assembly exteriorly mounted on the side of the actuator housing. The lock release assembly includes a toggle linkage directly engageable with the movable lock part to disengage the lock when a suitable force is applied to the toggle linkage exteriorly of the actuator. A lock spring is located immediately between the movable lock part and actuator piston for resetting the lock as the actuator nears such one end position.

Abstract: A rip detector system accurately monitors the integrity of a conveyor belt or the like substantially as a function of signals that establish a variable time frame determined according to belt speed and a further signal representing integrity. The belt includes rip sensors or antennas, for example embedded therein. Three detectors at related spaced apart locations relative to the conveyor belt system monitor the integrity of the antennas as an indication of the integrity of the belt. Two of the detectors are located upstream, i.e. relative to the belt travel direction, of a location frequently prone to encountering rips to produce information indicating both that an integral antenna has been detected and the effective speed of the belt, i.e. a speed relative time frame in which presence of that antenna at the third detector can be expected. The third detector is located downstream of the rip-prone location of the conveyor belt system.

Abstract: A circuit for generating plural AC signals, at least two of which may be relatively shifted in phase by a selected amount, includes a frequency divider for dividing the frequency of an AC input signal to derive a first AC signal at a relatively reduced second frequency, and a digital phase shifter responsive to the progress of the frequency divider for producing a second AC signal shifted in phase a selected amount from such first AC signal. The circuit is especially suited for use in a conveyor belt rip detector in which input and output coupling means couple an AC transmitter signal to antennas carried by the conveyor belt and receive an AC transmitter signal transmitted by respective antennas, and a detector monitors such AC signals received by said output coupling means and an AC reference signal to detect the integrity of the conveyor belt, for the circuit of the invention may be used to generate such AC signal and such reference signal relatively shifted in phase by a selected amount.

Abstract: A card frame kit includes end lates (10a, 10b) and cross rails (16) that can be assembled together to form the card frame. The kit is packaged in a box (30) with the end plates (10a, 10b) laid flat. When the kit is to be assembled, the box (30) is used as a temporary, disposable jig. To this end, inserts (40) that receive the cross-rails (16) comprise slots (44) in which the side plates (10a, 10b) can be stood up in the relative orientation they are to adopt in the assembled card frame. The assembler thus has his hands free to assemble at least some of the cross rails (16) to the side plates (10a, 10b) to form a self-supporting structure that can then be removed from the jig, if necessary or desired, to complete the assembly.