Abstract: Process for the production of technical grade biuret, readily in a form suitable for use as animal feed, by the controlled pyrolysis of urea in two stages, the first stage involving the partial pyrolysis of urea at a temperature above the melting point of urea to produce a first stage intermediate reaction product containing from about 20% to about 60% urea, and not more than about 25% cyanuric acid by weight, such reaction product being then cooled and comminuted, the comminuted product then being subjected, in solid form and in the absence of a liquid carrier, to a temperature at or slightly below the softening point of the solid particulate (suitable at a temperature of from about 100.degree. C. to about 140.degree. C.) with forced air circulation through the comminuted product for a sufficient time to lower its urea content by partial sublimation of the urea and partial further reaction thereof to biuret with only minimal further conversion of urea to cyanuric acid.

Abstract: A shaft boring machine including a rotatable cutterwheel assembly with a horizontal axis mounted on a carriage having vertical travel. The carriage is mounted on a slewing base frame and rotates about the vertical axis of the machine. An excavating unit for muck removal is mounted opposite the cutterwheel on the slewing base frame and loads directly from the shaft bottom into a muck hopper. When the hopper is full, it is discharged into a hoist bucket which is hoisted to the surface. The machine is positioned in the shaft by upper and lower gripper systems. Walking cylinders between the two gripper rings advance the machine up or down the shaft.

Abstract: A lockable, hinged garment hanger wherein the locking mechanism is gravity actuated and substantially enclosed between spring biased hanger arms, the locking mechanism including a lock actuator arranged between first and second wedging surfaces, each carried by an associated hanger arm and facing the other hanger arm, the configuration of the wedging surfaces and the lock actuator being such that, with the hanger upright and the hanger arms closed, the wedging surfaces retain the lock actuator in a lower position to hold the hanger arms closed, the hanger arms being unlocked and opened under spring action by inverting the hanger and manually squeezing the hanger arms together slightly, enabling the lock actuator to move by gravity from its wedged locking position toward the hinged ends of the hanger arms and release the arms to open.

Abstract: A head restraining device for preventing possibly injurious forward and lateral motion of the head of a child seated in a child's seat, such device comprising a rigid U-shaped restraining member which surrounds the forward and lateral portions of the child's head, and is of a size to be separated therefrom by a slight air gap so as to not be uncomfortable yet be capable of being engaged by the child's head and restraining such from any more than minimal forward and lateral motion. A flexible tether removably and adjustably anchors the head restraint to the back of the child's seat at any selected height. With the restrainer thus anchored, support members at the ends thereof aid in maintaining the restrainer rigid with respect to the front surface of the seat back and preventing the device from slipping out of place relative to the child's head.

Abstract: Cutlery apparatus with readily interchangeable cutting tools such as knives, the cutting tools being either double ended or a plurality of single ended tools pivotally mounted in a handle, either directly between the handle sides or on a generally U-shaped tool holding member which is in turn pivotally movable in and out of a slotted handle, the apparatus being further provided with lock arm means also pivotally mounted on the handle, forming a part of the handle when closed and retaining the tool rigidly in the handle without use of spring means when the tool is locked in the handle in a position of use. The apparatus which in certain embodiments is of a type commonly called swap blade knives, is readily disassembleable for tool interchange or cleaning. Double ended knives embodying the invention have the strength of a full tang knife with the versatility of a multi-bladed folding knife.

Abstract: A method of rescuing a person who has fallen overboard from a boat, including the following steps. As a first step, promptly after the person has fallen overboard, stopping the boat and deploying into the water a flotation sling on a floating tether line secured to the boat. As a second step, maneuvering the boat in order to progressively circle the person in the water so that the tether line and then the flotation sling are in reach of or contact the person, whereupon the person can place the flotation sling under his arms, and does so. As a third step, essentially stopping the boat. As a fourth step, hauling in the tether line so that the person in the flotation sling is drawn alongside the boat. And, as a fifth step, hoisting the flotation sling and person supported therein out of the water and onboard the boat to complete the rescue.

Abstract: A quick change tool chuck system including:(a) a chuck having: a cylindrical housing member having a lateral aperture for receiving two diametrically opposed jaw members; two jaw members for gripping the shank of a tool, each of the jaw members having an outer surface which is sloped, and each of the jaw members also having an inner surface forming one or more driving surfaces for rotating the shank of a tool and multiple holding surfaces for clamping the shank of the tool; and a cylindrical sleeve member slidably positioned over the housing member, the sleeve member having two diametrically opposed wedge members positioned on the interior surface thereof; and(b) a tool having: a work performing portion; and a round shank connected to the work performing portion, the shank having multiple identical planar surfaces recessed therein, each of the planar surfaces being spaced an equal distance from the crown of the shank, and at least two of the planar surfaces being in contact with at least two of the driving su

Abstract: Preparation of high yields of mixtures rich in polychlorinated pyridines by maintaining a chlorine to alpha-picoline weight ratio of greater than about 5:1 when feeding chlorine and alpha-picoline to reactor means at a temperature in the range of from about 100.degree. C. to about 250.degree. C., the reactants being contained in a well mixed diluent producing less than one mole of hydrogen chlorine per mole of diluent by reacting with the chlorine in the indicated temperature range.

Abstract: A dental handpiece having a low noise level consisting of: an elongated main housing having a head portion at the forward end thereof; a drive shaft located within the main housing and supported by fore and aft bearings mounted within the main housing; a rotor/burr holder located within the head portion of the main housing and supported by bearings mounted within the head portion, the rotor/burr holder being adapted to receive a burr drill or the like; an air-driven axial flow turbine wheel located and supported within the rear portion of the main housing, the turbine wheel being operably connected to the drive shaft; and, a coupling system for operably coupling the forward portion of the drive shaft to the rotor/burr holder. In one embodiment of the invention, the coupling system consists of a set of cylindrical driving magnets mounted on the forward portion of the drive shaft and a corresponding set of cylindrical driven magnets mounted on the rotor/burr holder.

Abstract: A video entertainment system by which human viewers conduct simulated voice conversations with screen actors or cartoon characters in a branching story game shown on a television screen. The actors and cartoon characters reply responsively with lip-sync sound to words spoken by viewers. Different audio and video frames are generated from a videodisc and data memory to provide one of several alternative replies or alternative actions at each branch point in the game, depending on what the viewer says to a speech-recognition unit. A simple speech-recognition unit can be used because the number of words to be recognized at each branch point is restricted to just a few words. A menu of prompting words is displayed on a hand-held unit to inform viewers of what words they can use at each branch point. The prompting words are programmed to be phonetically distinct to be easily distinguishable from each other.

Abstract: Preparation of high yields of mixtures rich in 3-chloro-2-trichloromethyl pyridine by maintaining a chlorine to alpha-picoline weight ratio of at least about 8:1 when feeding alpha-picoline hydrochloride and excess chlorine to reactor means at a temperature in the range of about 135.degree. C. to about 170.degree. C. and in the absence of a catalyst, the reactants being contained in a well mixed diluent producing essentially no hydrogen chloride by reaction with chlorine in the indicated temperature range.

Abstract: Production of polychloropyridine reaction product rich in 2,3,5-trichloropyridine by non-catalytic liquid phase chlorination of 3,5-dichloro-2-trichloromethyl pyridine at a temperature in the range from about 170.degree. to about 220.degree. C.2,3,5-Trichloropyridine is useful and an intermediate for the preparation of agricultural chemicals, especially herbicides.

Abstract: Skipping stones having characteristics enhancing their ability to skip a large number of times on the surface of a body of water and enhancing the distance they will travel across the water before sinking. The stones are formed of somewhat porous, cementitious material and have a lower, generally circular water engaging surface which is slightly dimpled in its near-center region and slightly convex in its near-edge region with a sharply convex peripheral edge and a generally cylindrical, slightly upwardly converging side wall, the configuration of the peripheral edge of the water engaging surface and the adjoining sidewall being such as to minimize surface tension induced suction on the stone, caused by the water across which the water engaging surface of the stone is moving. The upper surface of the stone is generally flat so as to readily distinguish it from its lower, water engaging surface. The stone suitably comprises a cast mixture of gypsum cement and fine sand in approximately equal parts by volume.

Abstract: Furniture quality game table with multiple plane surfaces on at least three sides of a cubical game board assembly, with end panels journaled for rotation on end standards spanning the board assembly, and with endwise removable locking pins and a handle for locking the board assembly with any one of the game board surfaces in an upper horizontal position, with the handle configured to cover the locking pins from view when engaged. The typical game board assembly is rotatable on a fixed trunnion bar on which a lighting fixture is mounted for back lighting of the game board surfaces. The table includes in its lower portion a storage compartment for game pieces, playing cards and the like.

Abstract: An exercising apparatus that is designed particularly for therapeutic purposes. The apparatus includes a rotatable turntable on a stationary base, and a post extending through the weight supporting center of the turntable for supporting a person. A pipe frame is mounted on the base for being grasped by the person so as to twist himself on the device. A pull rope is tied to the turntable and passed over a pulley on the base for hand-rotating the same.