Abstract: Bio-and blood compatible materials are prepared by treating the surface of a substrate to provide reactive primary or secondary amine groups sites which are activated by treatment with a dialdehyde or arylchloride for coupling to a biological in an amount sufficient to provide compatibility. The use of specific substrates, such as a compliant, and elastic material, such as a fabric-elastomer membrane matrix, results in a product having advantageous qualities as a thermal burn dressing. Detailed procedures and various products are described including gloves and sleeves and tubes with or without adhesive to facilitate formation of sheet materials into various forms and products. The products may have small holes provided therein for the rapid passage of accumulated fluid away from the wound or infusion of liquid materials to the wound site.

Abstract: An improved vending machine having an enclosure for storage of articles and an access door is provided with an arm affixed to the door and which has a free end, with a hydraulic door closer connected between the free end and the machine. A stop element is affixed to the machine enclosure and projects into the door opening of the access door for stopping movement of the arm thereby to limit the opening movement of the door and thus prevent application of excessive force to the hydraulic door closer. The vending machine also includes a latch hook releasably engageable with the stop element for restraining the door in an open position against return to a closed position.

Abstract: Jamming caused by absorbent members in sponge core barrels or loss of coring information caused by oil wipes in oil field boreholes in which sponge core coring tools are disposed can be avoided by employing a method and tool wherein the absorbent member is formed in placed in contact about the core after the has been cut and disposed within the inner tube. In the illustrated embodiment, a liquid foam is catalytically formed from two constituent parts. The constituent parts are hydraulically forced from longitudinal chambers defined within the inner tube walls into an area in the throat of the bit where the parts meet and exothermically generate a liquid foam. The liquid foam rises into a plurality of longitudinal open chambers defined within the inner tube. Each of the open chambers has a longitudinal slot defined therethrough which communicates the chamber with the axial bore in which the core is disposed.

Abstract: A retractable gun for mounting within the fuselage of an aircraft, typically a helicopter, is disposed in a firing position and aimed by rotation of a turret which is coupled to and parallel to the longitudinal axis of the aircraft. The gun is aimed by simultaneous and independent rotation of the gun about an elevation pivot axis through which the gun is coupled to the turret. The turret axis and turret is disposed within an enclosure or within the fuselage of the airplane to allow withdrawal of the gun and turret from their exposed position. However, even in the enclosed position the gun can be fired. The elevation pivot axis is approximately perpendicular to the turret axis and permits two independent degrees of rotational freedom with which the gun may be aimed. Thus, the gun may be aimed at any point within at least a hemispherical range beneath the fuselage of an aircraft.

Abstract: A carrier for facilitating hand carrying of several garment hangers of the type having a hook for suspending the hanger from a horizontal rod or the like. The carrier includes a carrier body, a slot defined in the body for receiving a number of garment hanger hooks, carrying handle or flexible straps connected to the carrier body, and releasable retainers for closing the slot and prevent accidental withdrawal of hanger hooks from the slot, so that the hangers associated with the hooks can be conveniently carried together while suspended from the carrier body with or without garments hung therefrom.

Abstract: A hoist is provided for facilitating the loading and unloading of a vehicle. The hoist comprises a mounting for mounting to an underlying structure, an upright post connected to the mounting, a column rotatably seated on the post and having a boom pivotally connected thereto, a drive connected between the boom and column to raise and lower a free end of the boom, a sheave carried at the free end of the boom, a hoist cable looped over the sheave, an eye affixed to the column near its lower end, a chain threaded through the eye and secured at one end to the hoist cable, and an anchor located upwardly above the eye for the releasably securing the other end of the chain to the column.

Abstract: A two-part drill bushing assembly makes use of a sleeve, identified in the trade as a lock liner bushing which is embedded in a jig plate for reception of a separate slip renewable bushing element. Extending through the renewable bushing element is an axial bore within which a drill bit rotates during operation on a workpiece. On the exterior of the renewable bushing element is a helical shoulder which, when rotated, interlocks with a locking shoulder of the liner bushing. The invention involves a stiff wire rod, a mid-portion of which is bent to form the locking shoulder and from which legs extend to positions of snapped-on attachment to the liner bushing.

Abstract: For lifting loads there is provided an eyebolt with an annular ring swivelly mounted on a stud so as to freely rotate in a horizontal plane through a full 360.degree.. A lifting loop has oppositely disposed pivot pins in swivel engagement with the annular ring to allow the loop to pivot in a vertical arc as well as to rotate about the stud. The stud in turn is adapted to be anchored in fixed position to the load, whatever the load may be. Snap rings at free ends of the pivot pins serve to resist pulling the pins free of the annular ring when a heavy lifting force is applied to the lifting loop.

Abstract: A reciprocating sander particularly adapted for sanding remote surfaces such as ceilings and walls is provided by concentrating a substantial part of the weight of the sander in a motor assembly. A lightweight extension tube extends from the motor assembly to a universal joint which in turn is coupled to a sanding attachment. The sanding attachment includes clips which secures a piece of sandpaper in a mechanism for converting angular rotation of the universal joint into relative reciprocating motion of a sanding plate and sandpaper with respect to the sanding attachment. By bringing relative force between the sanding attachment and the motor assembly, a resiliently retained driving rod within the extension tube, which is coupled to the universal joint and sanding attachment, is forced downwardly in the extension tube toward the motor assembly. This ultimately causes two clutch parts to engage thereby permitting the transmission of the motive force to the sanding attachment.

Abstract: Multistate mud pulsing is achieved by generating both positive and negative pulses within a drill string by means of a plurality of selectively operable bypass passages around a restriction to primary mud flow within a drill string or by venting to outside of the drill string. A fraction of the hydraulic mud is drawn from a location upstream from the restriction into a valve manifold. The removed fraction of hydraulic mud is selectively communicated from the valve manifold either to a point inside a drill string downstream from the restriction or to a point exterior to the drill string in annulus between the outside of the drill string in the borehole. Mud reinjected downstream from the restriction creates a positive pressure pulse within the drill string. Mud which is diverted to the annulus outside of the drill string creates a negative mud pulse within the drill string.

Abstract: An articulated float arm for a sanitary toilet flushing mechanism is normally bent at an angle by a detent mechanism to maintain a low water level in the toilet water tank. A linkage is provided to the exterior of the tank for releasing the detent mechanism, allowing the buoyant float to straighten the arm thereby admitting additional water into the tank to obtain more vigorous flushing action.

Abstract: A tool useful in facilitating the safe twist-off of an automotive radiator cap. The novel tool comprises a wrench element having an elongated handle with a radiator cap receiving socket at the lower end of the handle, and a shield element having a tubular grip with a hood skirt affixed at the lower end of the grip tube. The shield element is open at both its ends and the elongated wrench handle is both rotatable and axially slideable within the shield grip. In an operative assembled condition of the tool the wrench element is axially inserted into the shield element so as to shroud the cap wrench socket within the hood for deflecting hot liquid or stem ejected from a radiator, the hot fluid being diverted by the hood away from the person operating the tool.

Abstract: The loading, firing and ejection of beltless, cased ammunition is facilitated by the use of an oscillating breech having two breech chambers defined therethrough, which breech is disposed between two parallel ammunition chutes. Unfired rounds are provided to a load position in a first ammunition chute and the oscillating breech rotated to align one chamber with the load position. The unfired round is rammed into the aligned chamber, thereby forcing the spent cartridge just fired from the opposing end of the chamber into an eject position in a second opposing ammunition chute. Meanwhile, a second chamber within the oscillating breech is simultaneously aligned with a corresponding one of two barrel bores and fired.

Abstract: A diamond cutting tooth for use in a petroleum drag bit is provided with an extended and expanded effective diamond cutting surface by providing a linear sequence of triangular prismatic, synthetic, polycrystalline, diamond cutting elements generally along the line of direction of cutting within each tooth. Each element is offset from the preceding element in the sequence in a direction nonparallel to the line of cutting. More particularly, equilateral triangular prismatic diamond elements are laid within a V-shaped groove within a mold from which the cutting tooth is molded through conventional infiltration matrix techniques. The apical opening of the groove is 70 degrees, whereas the apical extent of each of the triangular apexes is 60 degrees. Each triangular element is laid on one side or other of the longitudinal groove.

Abstract: Accurate gap adjustments in an optical encoder used in a magnetic disk drive are achieved within a vane encoder assembly which incorporates a four-bar linkage. The optical encoder includes a fixed reticle and movable vane disposed between a light source and light detector. The fixed reticle is coupled indirectly to a housing which has a prismatic cavity defined therethrough. The prismatic cavity is characterized by a prismatic axis which is generally perpendicular to the direction of gap adjustment between the reticle and movable vane of the optical encoder. The prismatic cavity further defines four generally parallel hinge lines within the housing in a direction parallel to the prismatic axis of the cavity. A single adjustment screw is coupled to the housing to apply a compressive force to the housing in the direction of the gap adjustment.

Abstract: The present invention provides an eyeglass retainer headband comprised of a tube of pliable material having two open ends, a tube segment at each end being turned into itself to form a double walled end portion of somewhat reduced inner diameter and increased stiffness while also providing a smoothly contoured or finished edge around each opening of the tube to prevent fraying of the fabric. Although it is presently preferred that the tube be made of a knitted fabric, the invention is not restricted to such material and may extend to other pliable elastic materials.