Abstract: A hand propelled air glider type aerodynamic toy. The toy includes an elongated fuselage, a nosepiece which acts as a balance weight, a flat plastic or styrofoam member with an offset cutout which acts as the wings of the device, and a wing adjuster which secures the wing to the fuselage. The wing adjuster slidably accepts the fuselage to provide adjustments of the wing for different flight characteristics. The plastic fuselage passes through the cutout of the wing member thereby causing a slight upturn of the rear portion of the wing. The combination of the wing cutout and the angle of the wing construction with respect to the fuselage gives the device its aerodynamic properties.

Abstract: A plant tissue culture device is disclosed for the culturing of a plurality of plant cell tissue cultures or callus cultures on a liquid medium. The cultures are maintained in culture wells on a culture plate and a porous wick is used to transport nutrient medium to the cultures from a supply of medium in a medium vessel underneath the culture plate.

Abstract: A hinged vehicle gate arm is mounted for automatic traffic control on a gate operating mechanism. The arm includes a first section mounted to the gate operating mechanism and a second section attached to the first section by a hinge assembly for pivotal deflection of the second section upwardly of the first section. A resilient roller is mounted for longitudinal rotation below and substantially the length of the second section. The resilient roller and hinged section section limit damage to a vehicle contacted by the arm lowered by the gate operating device.

Abstract: The weather strip is intended to be applied to the edge of an aperture or closure element of the body of a motor vehicle and comprises an anchoring section of elastomeric material with a channel section, and a tubular sealing section also of elastomeric material coextruded with the anchoring section. In the portions of the weather strip intended to be applied to corner portions of the edge of the aperture or closure element, or to portions of the edge close to which there are obstacles, the tubular sealing section is curved relative to the anchoring section and is connected to the anchoring section along a curved line.The invention also relates to an extrusion head for extruding a weather strip of the said type.

Abstract: A centerless grinding machine is provided with a ferris wheel arrangement having multiple, circumferential pockets in which an annular workpiece is received from a loading chute, is internally ground by a grinding wheel and is discharged into an unloading chute after grinding by indexed rotation of the ferris wheel. The grinding machine includes a stationary alignment shoe cooperating with an individual alignment shoe carried in each pocket of the ferris wheel. In the grinding position, the stationary shoe preferably is at the 3 o'clock position while the alignment shoe in the adjacent pocket is at the 6 o'clock position. The grinding wheel is positioned on one side of the ferris wheel and a workpiece driver means is positioned on the opposite side. With the inventive grinding machine, annular workpieces, such as bearing raceways, can be loaded, ground and unloaded in rapid succession with high accuracy maintained during grinding.

Abstract: A method for the precision sharpening of the cutting edges of a fluted milling tool having a cylindrical cutting head, and apparatus for positioning the milling tool during sharpening. The method involves supportively contacting the flutes with an abutment finger capable of adjustable movement in a path perpendicular to the axis of the tool, whereby the cutting edge is accurately presented to a grinding wheel. The apparatus provides means whereby the position of the abutment finger may be controlled to provide cutting edges of a predetermined angle for tools of various diameter.

Abstract: An exhaust shroud adapted for mounting on the casing of a portable sanding machine is provided with a resiliently deformable lip arranged to engage with a surface of a driven sanding member or workpiece outwardly of such member in such a manner as to provide for an effectively controlled, vacuum induced flow of dust generated by a sanding operation into the shroud, while at the same time not producing a vacuum induced braking effect on movements of the sanding member or movements of the machine relative to the workpiece.

Abstract: A bed/shelter unit comprising a lightweight air mattress and a lightweight tent on the mattress adapted to be erected as a shelter over the mattress and to be collapsed on the mattress, the mattress, when deflated, and the tent, when collapsed on the mattress, being adapted to be compactly packed as by rolling them up into a lightweight bundle. The tent comprises a panel of lightweight flexible tent material adapted to arch over the inflated mattress from one side thereof to the other, the panel having inflatable arches at its ends adapted when inflated to extend over the mattress from one side to the other. End closures at the ends of the tent hold the arches in an erected position with the panel drawn between the arches and thereby arched over the mattress.

Abstract: An apparatus for displaying articles comprising: modular panels adapted to be joined together and fastened to a support wall, each panel having a back wall, a plurality of ribs extending outwardly from the back wall at separated intervals, a plurality of flanges each extending from the other end of the rib to form surfaces parallel to the back wall and coplanar with the surfaces of the other flanges and, to form channels between the back wall and adjacent flanges, a lower extension of the back wall, and an upper extension of the back wall extending beyond the uppermost flange, having a furrow for receiving the lower extension of another panel and having an indentation for indicating positions of bores for driving fasteners through the upper extension to fasten the panel to said wall. The lowermost flange of the other panel covers the fasteners when the lower extension is received by the furrow.

Abstract: A rooftop parapet, for a thermally-insulated-curtain-walled building, comprises: a parapet base; a thermally-insulated curtain wall having an upper part spaced apart from the parapet base with a gap therebetween; a moisture-proof sheet covering the gap; a thermally insulating material laid over an upper edge of the parapet base, the moisture-proof sheet, and an upper edge of the curtain wall; a waterproof sheet superposed over the insulating material; and a coping plate superposed over the waterproof sheet. Either the moisture-proof sheet or the waterproof sheet has a sagged portion so that the coping plate can follow the deflection of the curtain wall's upper part due to wind pressure acting on the curtain wall. The moisture-proof sheet serves to prevent the thermally insulating material from absorbing moisture inside the building, while the waterproof sheet serves to prevent dewdrops on an inner face of the coping plate from coming down to the insulating material.

Abstract: A dome structure wherein all of the junctures of surface struts or plates follow a design based on a modified helix formula.

Abstract: The apparatus comprises means for pivotally attaching one end of a link means to the structure, means for pivotally attaching the other end of the link means to the beam at a point distal from the structure, and means for supplying a compressing force to the beam intermediate the ends of the link means, the compressing force responsive to relative motion between the beam and the structure.

Abstract: The method of applying a glass flushly to a flanged window aperture comprises the steps of attaching resilient fixing clips (10), which have means (11) for attachment to the glass (4) and catch means (16) for locating positively on the window aperture flange, at spaced intervals around the periphery of the glass, applying a bead or beads of sealant (8) at least on the outwardly facing surface of the window aperture flange (1), locating the glass with the fixing clips attached in the window aperture and pressing down on to the sealant bead(s), and further pressing the glass home towards the flange until the fixing clips act under the applied pressure and against their resilience so as to deform intermediate sections B thereof sufficiently to permit their catch means to pass through the flange aperture, release of said further pressure permitting the fixing clips, due to their resilience, to restore into their original form and cause the catch means to locate behind said flange and thus positively hold the glas

Abstract: A unit type curtain wall assembly has an array of standardized curtain wall units each having a passageway for air and another passageway for hot or cold water extending through its frame members for room temperature control. For sealing a gap between the opposed side frame members of every two horizontally adjoining curtain wall units so as to minimize the loss of heat energy, an indoor sealing band and a first outdoor sealing band are connected between the opposed side frame members to close the indoor and outdoor sides of the gap therebetween. A second outdoor sealing band is connected exteriorly of the first outdoor sealing band to provide another closed space therebetween so as to prevent heat transmission from the outside. The three sealing bands with the two intervening closed spaces constitute in combination an effective heat insulator. The sealing bands are engaged with the side frame members so as to allow the relative displacement of the curtain wall units in their own plane.

Abstract: A preassembled door casement adapted to be received within an opening of a wall of selected thickness is provided with a positionable nailing fin about the assembly for securing the assembly to the opening. The position of the nailing fin with respect to the casement is selectable so as to accommodate the particular wall thickness.

Abstract: A building wall panel (14) is adapted to be mounted directly on the framework of a building and includes an exterior facing composed of thin, presized masonry panels (16) of, for instance, granite or marble, mounted on a support frame (18) by a plurality of attachment assemblies (24). Each attachment assembly (24) also includes a first subassembly composed of a pair of studs (30) extending diagonally rearwardly from panel (16) to extend within a pocket (28) defined by an enclosure member (26) of a second attachment subassembly secured to the support frame (18). The studs (30) together form a forwardly open bight which loops around a crosspin (32) extending through the enclosure member, through the interior of pocket (28) to engage with support frame (18). Pocket (28) is filled with a bonding medium (34) that creates a rigid interconnection between studs (30) and support frame (18).

Abstract: A channel end cap for use, in a mechanical fastening system for mechanically securing a flexible sheet, with a channel member of generally rectangular form, in transverse cross section, wherein the end cap is comprised of a flexible resilient material of a shape generally corresponding to that of the channel member and having first bottom, side and top wall portions separated by an intermediate abutment means from second bottom, side and top wall portions, extending from their corresponding first wall portions, axially outwardly of the channel member axial outer end surface, with the abutment means acting as stop means and abutting the channel member axial outer end surface.

Abstract: A beam member for use in a suspended ceiling system for retaining removable panel sections includes at each longitudinal end an integral tongue and a tongue-receiving recess for joining the beam member in end-to-end relationship with another beam member having an end of corresponding configuration. The tongue is characterized by inwardly diverging sidewalls, and an outwardly offset and a rearwardly extending detent. The detent has an edge defining a circular arc, and the recess includes an arcuate central portion for abutting the edge of the arcuate detent of another beam member when the beam members are joined and outwardly diverging sidewalls. Interlocked tongues of such configuration are capable of withstanding large tensile separating forces.

Abstract: A can stuffer and method of stuffing a can with a flexible sheet product by placing the product in a generally flat receiver chamber and pushing the product edgewise to crowd the product into one edge region of the chamber by forming longitudinal folds or creases in the product to effectively reinforce and strengthen the product in the direction of the folds, and endwise ejecting or ramming the strengthened folded or creased product from the chamber into a container or can.

Abstract: A cup dispenser for cups containing freshly made beverages comprises a discharge opening connecting a dispensing chamber with the interior of the dispenser. This discharge opening is from the inside filled by a rotor mounted about a vertical shaft. The peripheral wall of the rotor closes completely the discharge opening in any position of the rotor apart from the position in which a recess opposes the discharge opening. This recess is shaped in such a manner that it may receive a cup situated therein when the dispenser is activated. Subsequently, the cup is filled with the desired beverage at a filling station and optionally provided with a cover at a cover dispensing device. Such a dispenser protects the interior parts thereof efficiently against the environment, and furthermore it allows the positioning of the covers on the filled cups in a simple manner.

Abstract: A machine for stacking and bundling flexible sheets, such as the signatures that are delivered from a printed press, includes a succession of aligned conveyors. The sheets are deposited on the first conveyor where they accumulate in a generally horizontal disposition, one on top of the other, and the first conveyor withdraws sheets from the bottom of this pile and conveys them to a gate in a shingled condition. At the gate, which is narrower in width than the sheets, the sheets bow forwardly and rise upwardly at their leading edges until they stand on edge. It is in this condition that the sheets pass onto a second conveyor which moves them through another gate that is narrower than the first gate, so that the degree of bowing increases. The second conveyor moves slower than the first conveyor and as a result the flexible sheets consolidate in the upright condition on the second conveyor.

Abstract: The stacker of the device for aligning and banding paper sheets is movable between a lower position for receiving and holding paper sheets from a supply belt and an upper position for forwarding the paper sheets to a subsequent step. A coil spring is connected at one end to a fixed part and at the other to a movable operating unit, and is associated with a holding plate through the operating unit. When the stacker has been moved to the upper position, the holding plate is moved upwards relative to the stacker to clear the stack of paper sheets in the stacker.

Abstract: A case loader for loading pet beverage or other product bottles with a prominent neck flange in cases includes support rails spaced by gaps which support the bottles by the neck flange in suspended condition as they are moved by pusher bars from a grouping station to a case filling station.

Abstract: A stirrup stay for adjusting the horizontal angle of a horse saddle stirrup is constructed from a strip of sheet material that is adapted to be received in the space between the inner and outer portions of a stirrup strap and resting in the loop at the bottom of the strap. The strip of sheet material is hand-deformable by twisting to selectively impart the desired degree of twist to the stirrup strap. The strip may be formed from sheet metal having a cushioning coating protecting a majority of the edges. In one embodiment, a sheet metal strip is bent by 180 degrees near its center to bring opposite longitudinal ends together, and the opposite halves of the strip are covered by a sheath of leather, rubber, or other yieldable material. A central portion of the strip near the bend may remain uncovered and is protected, in use, by placement of the stirrup with its pivot pin resting in the bend.

Abstract: In a lawn mower for wheel drive, two switch yokes 16 and 18, pivoted swingably below the handlebar 10, are provided as switch members for the turning on and disconnecting of the motor and the engagement and disengagement of the clutch respectively. The clutch switch yoke 18 is, in this connection, developed as an entrainment lever which holds the motor switch yoke 16 in engaged position after said yoke has been released. A safety button must be depressed before the swinging of the motor switch yoke 16. It is not possible to turn the motor on by means of the clutch switch yoke.

Abstract: A belt-type power transfer assembly for driving the separating mechanism of a rotary combine harvester is disclosed wherein the assembly includes spaced apart driving and driven pulleys, an endless flexible belt interengaged between the pulleys to transfer rotational power therebetween and spring-loaded tensioning means operably engaged with the flexible belt to take up the slack thereof and to maintain proper tension therein when transferring rotational power. Stop means are associated with the spring-loaded tensioning means for restricting biasing movement thereof in the direction of the flexible belt, causing the tensioning means to act as fixedly positioned tensioning means after an initial belt tensioning movement thereof. The power transfer assembly according to the invention may be used to drive the separating mechanism of a rotary combine harvester.

Abstract: A disc mower-conditioner having a disc cutterbar with transversely spaced rotatable disc cutters to sever standing crop material by an impact action and a rotatable conditioning mechanism mounted rearwardly of the cutterbar to receive and condition severed crop material is disclosed wherein each disc cutter member is provided with a crop lifting ramp portion adjacent the peripheral edge of the disc cutter adjacent each knife in both leading and trailing relationships thereto. The inclined ramp portions are operable to lift previously severed crop material away from the corresponding knife before the knife severs standing crop material and to feed the severed crop material into the conditioning mechanism. The inclined ramp portions are provided on both sides of the knives to permit the disc cutter member to be rotatable in either clockwise or counterclockwise directions and still provide a leading crop lifting action.

Abstract: The wheeled assembly supports and converts a hand-held power grass trimmer device into a wheeled power mower. The assembly includes a wheeled frame and a two-part detachable joint. The frame is mounted on ground-engaging, support wheels. The two-part joint includes (1) a bracelet which is fixably and releasably mounted on the trimmer's shaft without impairing the operator's ability to hand manipulate the trimmer when it is fully detached from the frame, and (2) a casing secured to the frame which detachably receives and holds the bracelet together with its shaft in a predetermined upstanding and inclined position against downward and rotational movements, but leaves the casing free to release the lock between the bracelet and the casing when a pull is exerted on the trimmer handle in an upward direction along the longitudinal axis of the trimmer shaft.

Abstract: An adjustable multiple row head assembly for a crop harvester provides cantilevered support arms for a plurality of row head units. The units are adjustably positioned for harvesting crops planted in differently spaced rows. An adjusting device for the row head units provides infinitely variable adjustment, and specifically includes a jackscrew operating between a moveable frame member of the row head unit and the fixed cantilevered support arm therefor. The row head units extend in a fore-and-aft direction with respect to a base and include gathering conveyors driven by sprockets. The conveyors cooperatively form passageways having inlets for the crop, and engage idler sprockets adjustable in accordance with the row head unit adjustment to maintain proper tension in the conveyors.

Abstract: A pole mounted, fruit picking device for collecting fruit from trees. The fruit picker is comprised of a double ring jaw assembly mounted on the top end of a pole, with the bottom jaw being stationary and having a receiving bag or chute attached to it. The upper ring has a cutting edge and is pivotally movable by a pull device on the pole handle to snap down against the lower jaw and sever a fruit stem. The severed fruit drops through the bottom ring into the receiving chute. Flexible guard bands on the top ring extend around both sides of the cutting edge, and serve to protect the fruit against damage as a fruit stem is severed.

Abstract: A spinning frame 10 is disclosed for processing a strand at a varying strand movement speed to produce a strand processed with uniform tension. The spinning frame includes a motor 21 and a planetary gear box 30 which operates as a differential having first and second speed input elements formed by the rotation of the gear box housing 31 and a variable speed shaft 36. Housing 31 rotates at a constant speed and shaft 36 at a variable speed determined by the speed of rotation of a motor 50 which is controlled by an input to a variable capacity pump 45. A computer 70 operates through a servo-valve 60 to vary the speed of cylinder 18 to produce a speed required to maintain uniform tension on the strand.

Abstract: Thermally curable wet-impregnated rovings in which the fibers of the roving are impregnated with liquid polyepoxides lacking polymerizable unsaturation and having dispersed therein a latent heat-activatable epoxy curing catalyst, such as dicyandiamide. The polyepoxide dispersion has a room temperature viscosity of from 2000 to 5000 centipoises and a tack of less than about 6 on a Thwing-Albert inkometer. The rovings are produced without organic solvent using an elevated temperature which is insufficient to activate the curing catalyst and which lowers the viscosity to enable uniform impregnation in the absence of excess impregnant. The wet rovings can be stored without running in a supply package which may be cop wound, and running is also resisted in a void-free wet fiber composite so that the wet composite can be wrapped and then heated to cure the same.

Abstract: A jig is disclosed for assembling a track chain which includes pin adapters and bushing adapters attached detachably to tool bars. Each adapter is provided with an outer cylinder, an inner cylinder received slidably in the outer cylinder, a biasing device held within the outer cylinder for biasing the fore end of said inner cylinder so that it protrudes outwardly from the fore end opening of the outer cylinder, and a stop attached to the outer cylinder for preventing the inner cylinder from protruding excessively out of the outer cylinder. Circular recesses are formed in the inner peripheral surface of the fore end opening of the outer cylinder.

Abstract: A diametrically opposed pair of radially inwardly directed vortex-disturbing tabs are secured to a compressor intake assembly to eliminate vortex whistle therein.

Abstract: A gas turbine engine for aircraft. A generator, which undertakes to supply energy for auxiliary devices, is spaced between a compressor and a turbine. A heat exchanger which surrounds the generator housing, and through which compressor air and fuel flow, is provided for cooling the generator. The compressor air which is cooled by the fuel is supplied to the rotor of the generator, and possibly to a bearing of the rotor shaft.

Abstract: A fully aerobatic oil system for an aircraft gas turbine engine includes two re-circulatory oil systems the pumps for which have inlets 19 and 31a disposed at locations in the engine such that when one inlet is starved of oil, due to the aircraft attitude changing, oil will be supplied to the other one. In a specific embodiment, the breather of the oil system 30 (FIG. 2) is positioned in the engine gearbox and provides the lowest pressure point in the system. The breather is of the type described in UK Pat. No. 1,508,212 which includes a rotating compartment filled with RETIMET (Regd. Trade Mark). The bearing chambers are pressurised with air from the engine and the air/oil mixture in each chamber is vented via a first series of vents 24 to the breather where the air and oil are separated. The breather is used as a pump to pump the separated oil back to the oil tank via a scavenge line 35 which includes a relief valve 38.

Abstract: An improvement in a gas turbine engine fuel system of the type having an air pump delivering a stream of pressurized air at pump discharge pressure to a powdered coal manifold which manifold meters powdered coal into the airstream for delivery to and combustion in a combustor maintained at engine compressor discharge pressure, the improvement residing in the provision of an inlet restricting valve at the air pump inlet responsive to compressor discharge pressure and to pump discharge pressure to control the airflow inlet area to the pump so that pump discharge pressure varies directly with compressor discharge pressure and is maintained in excess of compressor discharge pressure with the ratio of pump discharge pressure to compressor discharge pressure remaining substantially constant throughout the operating range of the engine.

Abstract: A general purpose fluid displacement device for use as an external combustion engine, a compound expansion engine, a hydraulic pump, or as an air compressor. At least one bank of circumferentially spaced pistons are operably connected to and radially disposed about a rotor member that is eccentrically disposed to an imaginary circle collectively defined by said pistons such that the amount of eccentricity of said rotor determines the throw of said pistons as the pistons orbit the rotor attendant operation of the device.

Abstract: Damping of a helicopter rotor drive train, the drive train including the free turbines of a gas turbine engine propulsion system, the aircraft main and tail rotors, and associated shafts and gears, is accomplished through active modulation of the fuel flow to the engine gas generator. The fuel flow is varied such that a transient torque will be developed by the free turbines which is opposite in phase to drive train resonances.

Abstract: In order to combat flutter in rotor blades rotating within a duct bounded by a duct wall, the duct wall incorporates cavities tuned for resonance to a known flutter frequency. The cavities, which may comprise tubes immediately underlying a facing sheet of the duct wall, are arrayed around the circumference of the duct wall and communicate with the duct through openings in the duct wall near the tips of the blades. Flutter energy from the blades is transferred directly to the cavities by pressure waves and produces resonance in the cavities so that the flutter is damped aerodynamically. The invention is applicable to fans in turbofan engines.

Abstract: A wall flow monolith, for example, of circular configuration has its outer surface at the inlet end cut on tangents so as to provide four chordal flat surfaces with at least alternate channels next to these surfaces plugged at the inlet end so that exhaust flow is through these chordal surfaces into these channels whereby particulates are collected on the chordal surface. Glow plugs are positioned to ignite particulates on these chordal surfaces and, these glow plugs are energized either individually or in sets as an accumulated time function of engine operation.

Abstract: A compact expansion chamber for increasing the power of small internal combustion engines, particularly outboard engines for model boats. Its very compact, generally S-shaped configuration allows its center of gravity to be quite close to the engine to which it is attached, thus providing a very short moment arm. This allows model boats upon which it is installed to remain well balanced and level so that they are more maneuverable and quicker to respond to the radio control signals. The expansion chamber (10) comprises: a straight inlet pipe (12) having a flange (22), a diverging section (14) having a 150 degree bend, a straight tubular section (16), a converging section (18) having a 90 degree bend in the direction opposite to the bend in the diverging section, and an outlet pipe (20). A pressure tap fitting (24) connects to the fuel tank pressure line so as to improve fuel flow to the engine.

Abstract: A hydrostatic transmission including a pump and motor unit wherein the pump unit is displaceable effectuated by an operative member integral to the pump unit. A neutral start switch communicating with a carrying machine is mounted in the pump unit to contact the operative member in a manner causing the neutral start switch to become operative only when the operative member is assuming a neutral position.

Abstract: There is disclosed a hydraulic circuit system for use in a swivel type excavator. The circuit system having a plurality of variable displacement pumps for supplying pressurized fluid for manipulations of work implements and swivel means of the excavator, and control means operative to automatically adjust pump displacement to the output hosepower of a prime mover driving the pumps. The control means includes hydraulic pressure detector means, servo-control means respectively provided in the pumps, negative control valves for respectively controlling the servo-control means by the action of the pressure detector means, cut off valves respectively connected in series with the negative control valves, and summing valves respectively connected in series with some of the cut off valves so as to control pressurized fluid to be supplied into the servo-control means by the action of the fluid pressure delivered from the pumps.

Abstract: A control and regulating arrangement for an adjustable hydrostatic unit is provided in which the regulating device has an auxiliary control constant pump in the feed line of which there is a restrictor, in which case the pressure retained in front of the latter acts on a pressure chamber in which a regulating piston capable of sliding against the force of a spring and which influences the position of a regulating piston connected with the final control element of the hydrostatic unit and capable of sliding in a regulating cylinder is capable of sliding, characterized in that the unit is a hydrostatic motor and the auxiliary control pump is connected to its output shaft.

Abstract: In a hydraulic system for a combine harvester, each of three subsystems is supplied with fluid through its own individual reservoir outlet. The total return flows from the three subsystems is distributed between two inlet ports of the reservoir. A pair of wire mesh delivery tubes is connected between the respective return inlet ports and two of the outlet ports. The hydraulic circuitry is arranged so that the return flow at each inlet port exceeds the supply flow demanded at the corresponding outlet port so that, while some of the return fluid is directly recirculated through the delivery tube to that outlet, there is a net flow outwards through the wire mesh of the tubes to mix with the fluid supply held in the reservoir.

Abstract: A flushing valve system suitable for use in a closed circuit hydrostatic transmission including a variable displacement hydraulic pump, a hydraulic actuator and two main lines. The flushing valve system includes poppet valves mounted in passages for respectively communicating the main lines with a fluid tank, passages mounting throttles for causing the pressure in the main lines to act on pressure chambers to keep poppets of the poppet valves from moving to an open position, and a change-over valve responsive to the pressure differential between the main lines to communicate the pressure chamber of the poppet valve connected to the main line on the lower pressure side with the fluid tank. The poppet valve connected to the main line on the lower pressure side opens when a predetermined pressure level is exceeded by the pressure in the main line, to thereby allow working fluid in the main line to be drained to the fluid tank.

Abstract: A brake actuation assembly 10 having a master cylinder 12 attached to a stationary wall (14) of a vehicle and a power assist apparatus 16. Linkage 66 connects a movable wall 125 in the power assist apparatus 16 with pistons 64 and 68 in chambers 60 and 62 in the master cylinder 12. A valve 133 responds to an input from an operator to allow a pressure differential to be created across wall 125. The pressure differential moves the wall 125 while at the same time the linkage moves pistons 64 and 68 to pressurize fluid in the master cylinder 12. An adjustment mechanism 82 acts on the piston 68 to control the timing of the interruption of fluid communication between a reservoir 46 and chambers 60 and 62 as a direct function of movement of wall 125.

Abstract: A process for producing nitrogen and oxygen from a precompressed and cooled air, comprising compression of air to a pressure of from 0.3 to 0.6 MPa, cooling the compressed air to a saturated state with a partial liquefaction at a temperature of from 90.degree. to 100.degree. K. The cooled air with a partial content of the liquid is supplied to separation into at least one vortex tube.An apparatus for carrying said process comprises a compressor (1) and heat-exchangers (2) positioned along the path of movement of the compressed air, which heat-exchangers have a high-pressure cavity and a low-pressure cavity, and a vortex tube (4) having, at one end thereof, an inlet nozzle (5) and a diaphragm (6) for discharging nitrogen and, at the other end thereof, a diffuser (7) for discharging oxygen.

Abstract: A low-temperature pump having a throttling valve formed by tilting radially disposed vanes in side-by-side relation, capable of fully opening a pump port to a process chamber. Motion from one vane can be coupled to the next through shims which support the vanes and form a seal when the vanes are flat in a common plane. One of the vanes may be controlled independently of the others so that coarse and fine modes of operation may be achieved by separately controlling (N-1) vanes and the Nth vane. The vanes are maintained in thermal contact with a chilled outer wall surface of a first pumping stage of a two-stage pump, the second stage coaxially surrounding a first stage maintained at a very low temperature. A central hub, at the convergence region for the vanes, supports a shield, protecting the second stage from radiation through a port in the upper regions of the pump.