Abstract: A compressor-expander assembly for use in a refrigeration system which includes a housing defining compression and expansion chambers of generally cylindrical section arranged side by side. Compressor and expander rotors of cylindrical shape are journaled for rotation in the respective chambers. The rotor shaft is offset from the chamber axis so that the surface of each rotor extends closely adjacent to the wall of the chamber causing each chamber to have a convergent side and a divergent side. Equally spaced about the rotor periphery are a set of vanes having their outer edges extending into engagement with the walls of the respective chambers so as to define a series of compartments of changing volume. The compression chamber has an arcuate inlet port which extends over substantially the entire divergent side and a concentrated outlet port which is located near the end of the convergent side.

Abstract: A liquid scintillation counting composition of the type comprising an aromatic hydrocarbon solvent, an ethoxylated alkyl phenol surfactant, and a scintillation solute, contains a small amount of a substituted ethoxylated carboxylate acid and/or a tertiary amine salt or a quaternary ammonium salt of such acid. The free acid reduces chemiluminescence upon the addition of an alkaline sample to the composition, while the tertiary amine or quaternary ammonium salt enhances the water miscibility of the composition.

Abstract: An inking system for applying ink to a printing plate which includes a fountain roller and a series of ink feed rollers with at least one vibrated roller or drum. Means are provided for automatically regulating the temperature of the fountain roller thereby to maintain constant the amount of ink fed over a long press run for maintenance of a predetermined full tone density. Means are also provided for automatically regulating the temperature of the vibrated roller thereby to maintain constant the printing contrast in the half tone portions of the plate. The temperature regulating means includes both a source of heat and a source of cold, making it possible to either warm or cool the rollers thereby permitting automatic operation over a wide range of conditions including a wide variation in the ambient temperature. In the preferred embodiment the temperature of the rollers is maintained by circulating a fluid such as water through the rollers from a reservoir of fluid at a controlled rate and temperature.

Abstract: A metal drum or container having rubber rolling hoops extending around the outer surface thereof is provided with an improved fastening means for securing the hoops to the drum. The rubber rolling hoops are fitted between pairs of beads in the wall of the drum so that the drum can be rolled on the hoops, with each hoop forming a pair of grooves where the hoop can be clamped to the drum. A pair of metal hoop rings are fitted into the grooves in each hoop for clamping the hoop to the container. A fastener is threaded onto one end of each ring with a hole extending through the fastener for receiving the other end of the ring, which is threaded so that a nut can be screwed onto the free end of the ring and against the fastener for drawing the ring through the fastener and tightly against the hoop and the drum so as to clamp the hoop against the drum.

Abstract: A pressure intensifier unit formed of a low pressure air cylinder and a high pressure hydraulic cylinder joined substantially end-to-end, with a large diameter air piston in the low pressure cylinder and a cylindrical piston, in the form of a straight-sided post, secured to the air piston and extending into the high pressure cylinder. An annular gland is provided at the junction between the cylinders for surrounding and sealing the cylindrical piston and for isolating the cylinders from one another. The inner diameter of the high pressure cylinder is greater than the diameter of the cylindrical piston so that, when the cylindrical piston moves into the high pressure cylinder upon application of air to the low pressure cylinder, clearance exists around the cylindrical piston, with hydraulic fluid being volumetrically displaced. The gland serves to mount a pair of axially spaced annular sealing elements with a replenishment port in between them connected to a source of replenishing fluid.

Abstract: In a sign-making machine, a stylus is mounted within the free end portion of an arm carrying a router to follow a template for cutting grooves in a workpiece to produce a sign. The stylus includes a body slidably mounted in the arm for movement between extended and retracted positions with respect to the arm and a spring acts between the stylus body and the arm to urge the stylus into its extended position for engagement with the template before the router bit cuts into the workpiece as the arm is lowered from a raised position into a working position. An adjustable stop connected to the stylus abuts the arm to support the arm against sliding downwardly on the stylus below a selected distance from the tip of the stylus and is movable vertically relative to the lower end to vary the selected distance while cutting a groove in the workpiece so as to move the arm vertically and thereby adjust the position of the router to follow the surface of the workpiece.

Abstract: A sound-deadening device for use in a feed tube for bar stock includes a radially resilient sleeve having a relaxed diameter greater than the diameter of said tube so as to be held frictionally within the tube in a preselected position by expanding outwardly against the interior surface of the tube. Telescoped into the sleeve is a generally cylindrical backing having the outer ends of a plurality of generally radial bristles embedded therein. The bristles extend inwardly from the backing and include inner ends defining a central passage through the sleeve. The bristles support bar stock within the feed tube and, during rotation of the stock, resiliently cushion the stock against striking the interior of the tube thereby deadening the noise otherwise caused by rotation of the stock within the tube.

Abstract: When turned to a locked position, a turn button causes the outside operating lever of the latch to be held against rotation so as to lock the door against entry from the outside. Turning of the inside operating lever in either direction to open the door causes the turn button to return automatically to its unlocked position to prevent inadvertent locking of the door. Automatic return of the locking button is effected through the coaction of a spring-loaded pin on the inside lever with a pair of shoulders on the inner face of the turn button.

Abstract: A rotational drive assembly including a pair of pinion gears journalled on idler shafts disposed laterally on either side of a drive shaft and meshing with the teeth of a drive gear and a ring gear. The drive shaft is universally journalled for rotation and for permitting a limited range of movement of the drive gear toward and away from the ring gear to substantially equalize tooth contact between the drive gear and each of the pinion gears as the drive shaft is rotated. A slotted bearing may be provided to preclude excess lateral movement of the drive shaft.

Abstract: Upper and lower milling cutters scalp the top and bottom surfaces of an ingot as the ingot is advanced between the cutters by a carriage. The carriage comprises a pair of laterally spaced and longitudinally movable slides which support sharp-pointed plungers adapted to dig into the sides of the ingot to clamp and support the ingot for movement with the slides. The carriage formed by the slides and the plungers is of open-ended construction and is adapted to move into and out of straddling relationship with the ingot in order to reduce the dwell time of the carriage when picking up and releasing the ingot.

Abstract: A belt conveyor construction in which narrow belts are trained about rollers supported on square flanged holders that slidably fit in opposite ends of square spacers. Simple screws adjust belt tension and secure the holders in the spacers. The weight supporting run of the belts pass over flanged support rollers journalled on the spacers, and the support roller flanges extend less than the thickness of the belts.

Abstract: A maximum security padlock of the type having a monolithic lock body or case with a plurality of shackle and lock-receiving bores therein is made of a compressed and sintered powder metal alloy of an austenitic stainless steel. As a consequence of this unique material, the lock body is readily made with most or all of the bores formed in compressing the powder metal. While the resulting sintered lock body is relatively, substantially, softer than a conventional lock body and the shackle, when an attempt is made to saw or otherwise cut through the body the stainless steel work-hardens to resist and slow down further cutting. Improvements in the lock mechanism augment the characteristics provided by powder metal fabrication.

Abstract: Apparatus for milling the end edge surfaces of truck rims to remove weld projections including a frame having a clamping means for holding the rim in an operating station, a pair of spaced apart power heads carrying cutting tools and actuator means for moving the power heads and cutting tools at a predetermined spaced apart distance transversely with respect to the axis of the rim to remove the weld projections. The upper power head and cutting tool are mounted for vertical movement and stop means carried by the upper power head directly locates the spaced apart position for the upper cutter to remove the top weld projection on the rim.

Abstract: A method and apparatus for ultrasonically welding the overlapped portions of a continuous metal strip that has been rolled about a longitudinal axis to form a tubular product. The metal strip is rolled around the outer surface of an internal mandrel by means of one or more forming tools disposed around the mandrel. At the exit end of the forming tool, a stationary, rigid, non-resonant anvil is formed by a portion of the outer surface of the mandrel so that the anvil is located inside the rolled metal strip and supported by that portion of the mandrel which extends outwardly between the longitudinal edges of the strip upstream of the point where the strip edges are brought together. As the rolled metal strip is advanced, the longitudinal edges thereof are overlapped and passed over the anvil.

Abstract: A method of colorimetrically analyzing even heavily turbid or already strongly colored water by first sensing transmitted light from a light beam through a sample of the fluid, adding color-producing test reagents to the sample, again sensing transmitted light from an identical light beam, and comparing the sensed light readings to detect the change, if any, produced by the added reagents. Two colorimetric cells are used, one for testing before the addition of reagents and the other after, with the cells being defined by glass cylinders in which pistons reciprocate to pump measured samples to the cylinders, clean the cylinders on each pumping stroke, and "valve" or block the light beam so that the other cylinder can be "read". Simple displacement pumps for the reagents, and the cell pistons, cooperate with valves defined by pincher arms squeezing flexible tubing to move measured amounts of sample and reagent throughout the analyzer.

Abstract: An automatic steering system for vessels, operational in a manual mode to select a desired heading, and in an automatic mode to maintain the selected heading. In the manual mode, a magnetic compass incorporated in a servo loop is maintained at a null position to continually monitor the vessel heading. When the system is switched to the automatic mode, the compass servo loop is deactivated and a control loop activated. The control loop keeps the compass output at null by maintaining the vessel on the selected heading. Automatic course corrections are accomplished by turning the helm an amount proportional to a deviation signal, and immediately returning the helm to its original position less a small preset angle. A wireless remote control unit affords the capability of remotely steering the vessel, selecting a new course, and switching between automatic and manual modes.

Abstract: The converter includes a dc. motor energizable from a battery and adapted to drive an alternator which produces an ac. output for powering a remote load device. The latter is adapted to be connected to the converter by a three-wire extension cord having a ground wire for grounding the load device. A manually operable switch is located near the output end of the extension cord and is connected across the ground wire and one of the conducting wires of the cord. The motor of the converter may be started by momentarily closing the switch and may be stopped when the switch is next closed momentarily.

Abstract: A hydraulic pressure amplifier with a scavenging pump operable to establish a negative return line pressure to effect a positive and rapid return of the rod of a one-way hydraulic actuator and thereby eliminate the necessity of third line-type systems that depend on gravity and/or spring-loaded actuators to return the hydraulic fluid to the tank.

Abstract: A device for positioning the shoe of a golfer with the outside edge of the shoe elevated with respect to the inside edge includes a crosspiece extending laterally across the instep of the shoe and a strap which is connected between the opposite ends of the crosspiece to hold the latter on the shoe. An arm is connected pivotally to the inner end portion of the crosspiece to swing between an out-of-the-way position within the instep for walking and a support position for elevating the outside edge of the shoe. In the support position, the outer end portion of the arm is spaced downwardly from the crosspiece to engage the ground and the arm is held in such position by a brace having one end hinged to the outer end portion of the arm and an opposite free end which abuts the crosspiece. To collapse the device for walking, the free end of the brace is swung from beneath the crosspiece to enable the arm to be swung into its out-of-the-way position.

Abstract: An elevating-type scraper for earth-moving purposes having an open fronted bowl which includes a pair of spaced vertical side sheets, back wall and floor, the bowl being supported by a pair of draft members extending from the tractor-supported draft frame. An apron extends transversely between the side sheets in the front portion of the bowl and carries a scraper blade. An elevator is rearwardly inclined over the apron for conveying loosened soil from the blade into the bowl. A strike-off member is hinged, in fixed position, to the front edge of the floor to the rear of the apron. The apron is pivoted to the bowl for forward swinging movement to actuate the striker and to create sizable discharge opening ahead of the floor for dumping of the material collected in the bowl, the discharged material being leveled smoothly over the entire bowl width.