Abstract: A filing guide for saw chain which includes a plate having a flat expanse joining with a curved expanse at the forward end of the guide which forms a cylinder. The guide is useable, with one side facing upwardly and the cylinder seated in a pocket defined in a saw chain, to guide a file during filing of a depth gauge and a safety projection in the saw chain. With the guide turned over from this position, and the cylinder again seated in the pocket, the guide is useable to guide a file during filing of a cutting edge in the saw chain.

Abstract: A switching current supply circuit, in response to a control voltage, controls the current flowing in an inductive load. Included is a pair of terminals adapted for connection to such a load and a bridge network connected to the terminals for producing a voltage indicative of the current flowing through the load. A comparator switches an output voltage between two distinct values in response to a differential input voltage having components derived, at least in part from the control voltage and the load-current-indicating voltage. Finally, a polarity-changeable voltage source, in response to the output voltage, applies, selectively and reversibly, known voltages of opposite polarity through the bridge network to the load-connectable terminals. These known voltages effect a change in load current level appropriate to decrease the absolute value of the above-mentioned input voltage.

Abstract: An elongate cushion for therapeutically supporting a person in an arched face-down prone position. The cushion has an upper surface which slopes upwardly from each end toward the middle. At least one end has a channel the sides of which support a person's head placed face-down therein, with the channel serving as an unobstructed air passageway. The preferred embodiment consists of an assembly of three nestable pillows. Two end pillows, each having a channel, support an intermediate pillow. Also, the end pillows are sized so that, when spaced apart, they will, in cooperation with a horizontal support surface on which they are placed, support a person in a supine position.

Abstract: A liquid-flow control valve with pressure-sensitive gas-bleed apparatus having a debris-catching feature. Included is a disc sealingly seatable selectively against a valve seat to open and close the valve. Apertures, which extend through the disc, remain open when the disc is seated on the seat. An aperture closure device, disposed adjacent the disc on the side from which fluid normally flows, has a pressure-responsive flex web biased by natural internal relaxed-state memory to form, in cooperation with the disc, a cavity which communicates with the apertures. The web has openings which are offset from the apertures when viewed along the adjustment axis of the valve and which communicate with the cavity. The web is moveable under the influence of liquid pressure from within the body toward the disc to collapse the cavity and to close the apertures when the disc is seated on the seat.

Abstract: A nontoxic, immunologically crossreactive toxin A protein produced by a PAO-PR1 mutant strain of Pseudomonas aeruginosa. The protein, in activated form, has substantially no adenosine diphosphate-ribosylating activity, and is nontoxic to cells known to be susceptible to the parent PAO-1 strain of Pseudomonas aeruginosa from which strain PAO-PR1 was derived. The nontoxic toxin A protein is immunologically indistinguishable from, and has a molecular weight similar to, native toxin A protein produced by the PAO-1 strain.

Abstract: Apparatus for producing a preselected final image in a travelling magnetic image-storage medium, which image is formed of an arrangement of individual magnetic image units and line segments formed of a plurality of linearly disposed contiguous units having a predetermined center-to-center spacing. Adjacent units in adjacent line segments have substantially the same predetermined center-to-center spacing when viewed in a direction substantially normal to the direction of travel, and also have a known maximum actual center-to-center spacing. Plural magnetic writing heads, each capable of producing an image unit, are distributed to have, when viewed in a direction substantially parallel with the direction of travel of the medium, a center-to-center spacing equalling that of contiguous units in a line segment. The actual center-to-center spacing between heads capable of forming adjacent image units in a line segment exceeds the mentioned center-to-center spacings between adjacent units.

Abstract: A fluid layering device for use with a syringe to facilitate layering a liquid from the syringe onto a denser liquid contained in an open-top centrifuge tube. A fitting in the device is releasably attachable to the syringe for receiving liquid therefrom. An elongate nozzle carried on the fitting has a pair of opposed end faces, and a pair of flow-constricting bores communicating associated nozzle end faces with liquid received in the fitting. An annular step formed on the fitting is engageable by friction fit with the tube's upper open end to hold the nozzle at an axially aligned position within the tube. At this position, each of the nozzle end faces confronts, and is spaced from, an inner wall portion in the tube by a clearance which is adapted to produce, with liquid being forced from the syringe through the associated bore in the nozzle, a controlled-flow ribbon of liquid down the wall of the tube onto the upper surface of the denser liquid in the tube.

Abstract: A device providing reciprocating drive for a vehicle having a sprocket or drive wheel rotatably mounted on a frame. The mechanism is operable to reciprocally rotate a pair of independent hubs which impart a torque on such a wheel in a known direction when rotated in one direction and impart no force when rotated in the other direction. Included in the mechanism is a pair of spaced-apart sheaves rotatably mountable on such a frame and lever arms for applying rotational force to the sheaves. In one preferred embodiment, each sheave is operably attachable to a different hub. A pair of opposing cables with an end fixed on the rim of each sheave extend around separate idler pulleys interposed the sheaves in such a manner that the cables apply opposing rotational forces on each rim when placed under tension. The cables may be connected in such a manner that only one of the sheaves tends to rotate a hub in a torque-imparting direction.

Abstract: A test slide for the performance of a series of immunoassay tests having: a substantially elongated and thin body of solid material; a plurality of individual test wells formed in said body; alignment means formed in said body in association with each of said wells; and movement facilitating means formed in said body; said slide being suitable for insertion into an automated testing device, said slide moving by said movement facilitating means, and said wells being aligned for detection by said alignment means.

Abstract: Apparatus for effecting clarification of liquid having particulate material entrained therewithin includes a filter screen and a filter-cleaning device disposed adjacent thereto operable for removing particulate material from the filter screen which has been deposited or accumulated thereon from a particulate-laden liquid discharged onto the filter screen. The filter-cleaning device includes a dispenser which is selectively positioned, in an automatic manner, relative to the filter screen to direct a fluid flow against the filter screen at variable locations thereon to impart movement to the retained particulate material relative to the filter screen. Additionally, the filter-cleaning device of the present invention includes a plurality of nozzles, which form the dispensing device, mounted on a carriage which is operable for carrying the dispensing device so that the nozzles will be presented over the filter screen in a selective, reciprocally shifting manner.

Abstract: A compartmentalized, variable cushioning sole construction in footwear having a top attached to an inner sole. The construction includes an outer sole and a flexible wall structure joining the peripheral edges of the inner and outer soles to form an enclosed space therebetween. This space is partitioned into fluid-tight, independently inflatable compartments corresponding to the heel, arch and ball regions of a foot. Resilient support structure in each of the compartments provides resilient weight support between the inner and outer soles when the compartments are deflated.

Abstract: A chain saw mountable on a powered vehicle having a chain support with a loop-defining chain run including an exposed cutting run portion. The chain support has a lower surface which defines a lower tree-cutting surface along which the lower support surface travels during cutting. The non-cutting run portion of the chain loop is disposed coincident with or above this lower surface. The upper surface of the support covers the non-cutting run portion and has a general wedge-shaped tapering toward the cutting run portion.

Abstract: A composition for treating wood to impart fire retardance prepared by converting dicyandiamide to an aqueous guanyl urea solution, methylolating the guanyl urea and introducing phosphoric acid to produce a phosphate salt of the methylolated guanyl urea.

Abstract: A belt grinder cooling method and apparatus featuring specially controlled flows of a coolant liquid--one in the interface region between the working run of the belt and a supporting platen, another in the interface region between a workpiece and the belt's working run, and a third onto the belt downstream from where the belt contacts a workpiece.

Abstract: A structural member including a chord member and a web joined through an edge to the chord member. The web has a multi-layered laminated construction with opposite plies forming the faces thereof having grain which is perpendicular to the grain of the chord member. One face ply is thicker than the opposite face ply, and protrudes beyond the opposite face ply. A groove in the chord member having a cross-sectional profile matching the cross-sectional profile of the edge of the web receives the edge of the web.

Abstract: Apparatus for use in a skyline logging system. A carriage mounted for reversible travel on a skyline is transported by a skidding line connected to a hoisting line which feeds through the carriage for attachment to logs. A tagline is attached at one end to the skidding line and its other end is received by a take-up reel mounted on the carriage which is disengageably drivingly connected to a radio-controlled unidirectionally operable power-operated drive motor mounted on the carriage. When operated in an engaged mode, the reel takes up the tagline and hence the skidding line. The reel is allowed to pay out the tagline in a disengaged mode. Additionally, the motor is connected to a pinch-roll device, also mounted on the carriage, for pulling the hoisting line into and through the carriage in cooperation with the take-up reel.

Abstract: Scissors with thumb retainer for receiving the two phalanges of the thumb. The thumb retainer integrally joins and is generally in line with the shank of the thumb-actuated blade. It includes a cup portion against which the outer end of the distal phalanx seats and an elongate sleeve portion joined to the cup portion, constructed to restrain the two thumb phalanges therein. During a cutting operation, upward and downward movement of the thumb occurs in the swing plane of the blades and is generally parallel to the palm of the hand.

Abstract: Apparatus for washing a delivery cart of the type having an open side. The apparatus includes a chamber and a floor-mounted platform defining a chamber washing station. A pair of side-by-side, vertically disposed spray booms are mounted within the chamber for swinging movement adjacent the open side of the cart positioned at the washing station. A drive system in the apparatus is operable to produce coordinated oscillation of the two booms, to direct pressurized wash water therefrom against substantially the entire inner cart surfaces to be washed. A rotary spray boom mounted in the chamber for rotation about the washing station is operable through another drive system to direct pressurized wash water against substantially the entire outer surface of the cart. The cart is discharged from the chamber, after washing, by a gravity-assisted off-feed device.

Abstract: A redeemable carbonated beverage can on the lid of which there is provided a pair of spaced, redundant, arcuately distributed code patches containing regional redemption information. The code patches are read by a scanning laser beam. These patches may be formed in several different ways, as by impressing them, embossing them, or printing them. Information in the patches may be coded in any convenient manner, as, for example, in a binary-type code or in a frequency-type code.