Abstract: A ski attachment device having safety, functional and decorative features. The ski attachment includes a sheath adapted to be retainably received over the tip of the ski, a battery-powered light, and a housing for mounting the light on the sheath so as to aid a skier during periods when sufficient illumination is not available. The ski attachment device is particularly useful in alpine and cross-country skiing to illuminate the trail in front of the skier, to assist the skier in always knowing the position and alignment of his ski tips, and to aid other skiers in being able to see the position and direction of motion of the skier. A hood-like extension at the forward end of the housing directs a major portion of the generated light in a forward direction and an aperture in the extension allows a smaller portion of the light to be directed rearwardly and upwardly for alignment purposes.

Abstract: A safety cover for a door knob is designed to complicate the opening of the door by small children but permits the opening of the door by other persons by proper manipulation of the safety cover. A pair of inner and outer annular cover parts with interengaging fastening formations surround the shank and door knob. A resilient pressure pad is carried by the outer cover part between a flexible wall portion thereof and the front surface of the door knob. The safety cover when turned by a small child rotates freely on the door knob. When a sufficient force is applied to the flexible wall portion of the outer cover part, the resilient pressure pad is urged against the front surface of the door knob to frictionally grip same thus permitting the safety cover to turn the door knob.

Abstract: The disclosed vibratory cable plot has two in line plow blades supported on a trailer having a transverse horizontal pivot and a vibrator which imparts a rocking oscillatory motion to the trailer and the blades. The first blade is preferably shorter, but thicker than the second trailing blade. The second blade is longer than the first blade and has a trailing cable guide guiding flexible cable, pipe and the like into the slot cut by the blades. The double blade assembly is more efficient than a single blade and reduces blade wear.

Abstract: A V-shaped, substantially flat, sheet metal, combined web-connector plate having diverging web-forming legs and integral apex and leg end connector portions provided with struck-out teeth for embedding within spaced apart wooden chord members to form a wood chord-metal web type truss. The connector plate is offset inwardly from the end of the chord and the connector plate is positioned to slightly overlap a beam or columnar support to reduce shear stress in the chord.

Abstract: In the method of making dental crowns and bridges, wherein from a bite simulating articulated master model of the patient's jaws, there has been sliced and separated a master die of the particular tooth and adjacent jaw requiring a crown or bridge, the steps of marking a contrasting finish line on and around the master die, and applying a layer of plastic sheet spacing material around said die down to the finish line. Further steps include applying a supportive plastic coping over the spacing material overlapping the finish line, and thereafter trimming said coping at the finish line and simultaneously forming a V-shaped channel around the die in registry with the finish line. Further steps include removing the spacing material and reapplying the master die and coping to the master model. Applying molten wax into the cavity of a preselected metal stamp having an occlusal or lingual anatomy approximating the optimum shape of the particular tooth creating a preformed occlusal pattern the depth of the stamp.

Abstract: A method of forming a self-supporting contoured foam plastic laminate, including spraying a relatively flexible open cell plastic foam, preferably polyurethane, on a sheet which is to become part of the laminate, applying a second sheet over the foam layer and promptly forming the contoured laminate under pressure in a die. The disclosed laminate includes a corrugated paper sheet, wherein the corrugations extend into and are bonded to the foam layer and a relatively flexible finish sheet bonded to the foam layer. In the disclosed automotive headliner, the corrugations extend perpendicular to the headliner side edges, providing support for the concave midportion of the headliner and preventing delamination of the paper and foam laminae.

Abstract: A simple plastic valve cartridge and faucet valve utilizing a concentric metal pipe having an enlarged bore receiving the valve cartridge. The cartridge includes a cylindrical stationary valve member having an axially off-set inlet bore and an opposed axially projecting peripheral rim portion, a rotatable valve member having an inlet port axially off-set for communication with the port of the stationary valve member and a transverse outlet port, and an annular closure member having an axially projecting peripheral rim portion cooperating with the stationary valve member rim portion to define a cylindrical chamber receiving the rotatable valve member. The valve cartridge thus eliminates the requirement of complex machined metal parts while providing the anti-noise and flow features of the prior art.

Abstract: The method of this disclosure permits the application of a foam layer, in fluid form, to a relatively porous substrate and the formation of a contoured foam laminate using a relatively rigid foam. The method includes heating the substrate prior to application of the fluid foam and forming the laminate in a die prior to completion of foaming. The laminate includes a flexible substrate, preferably a polyurethane foam layer and a lattice skrim located between the substrate and the exposed surface of the foam layer.

Abstract: Workpieces of a synthetic plastics material are heated to enable further lding thereof to be effected. Heating is effected by infra-red radiators and, in order to ensure that localized overheating is avoided, the surface of the workpiece which is exposed to radiation is cooled during the heating process.

Abstract: An apparatus is provided for the mixing and extruding of thermo-plastic and thermo-setting materials in which a rotor member is rotatable within a barrel member. The members are provided with interacting rotor and barrel helical grooves in the mixing stage of the apparatus which includes a rotor to barrel stock transfer zone and a barrel to rotor stock transfer zone. The grooves of the rotor and barrel members, in the rotor to barrel zone, being sized, with the extrusion capacity of the helical groove in the rotor member decreasing and with the helical groove in the barrel member providing the extrusion capacity for the material. With such a construction relative rotational movement between the barrel and rotor members forces material or stock from the groove in the rotor member into the groove of the barrel member at an approximate uniform rate along the length of the rotor to barrel zone.

Abstract: An angle control, particularly for a bulldozer or tractor blade having a U-shaped frame, including a pair of piston-cylinders on each side of the vehicle and a hydraulic control. The cylinders of each pair of piston-cylinders are rigidly connected in vertically stacked overlapping relation above the side portions of the U-shaped frame with the piston rods extending in opposite directions. One piston rod of each pair is operably connected to one side of the blade and the opposed piston rods are connected to the frame. The control simultaneously extends one pair of piston-cylinders while retracting the opposed pair to angle the blade about a vertical axis. In one embodiment, the piston rods are solid with the hydraulic control including flexible lines connected to the hydraulic cylinders. In the other embodiment, the rearwardly extending piston rods are hollow having passages to the head and rod ends of the hydraulic cylinders.

Abstract: A bulldozer having a transverse blade and angling cylinders on opposed sides each cylinder having a rod connected to the bulldozer and a forwardly extensible cylinder operably connected to the sides of the blade for hydraulically angling the blade about a vertical axis. The hydraulic control includes a plurality of lines extending in an arch from adjacent the bottom of the front of the bulldozer to the back of the blade. The blade includes a channel-shaped shroud or guard extending from one side of the blade to the other which receives the lines. The lines then extend in opposite directions to the angle cylinders, eliminating the present requirement for hollow rod-trunnion mounted angle cylinders and permitting the use of solid rod piston cylinders.

Abstract: A nickel base, relatively low temperature brazing alloy, particularly suitable for brazing, carbon and low alloy steels, nickel base alloys, copper alloys and stainless steels, (including thin sections, eg. honeycomb) in dry-hydrogen or inert atmospheres and in partial-pressure or high vacuums. The brazing alloy is also suitable for brazing in "wet" endothermic and dissociated ammonia atmospheres. The brazing alloy consists essentially of, by weight, about 19 to 23 percent manganese, 5 to 8 percent silicon, 4 to 6 percent copper, 0.6 to 1.8 percent boron, 0.01 to 0.2 percent rare earth, preferably mischmetal, additions of up to 3 percent tantalum, molybdenum, columbium, tungsten, and aluminum, under 0.03 percent carbon and the balance nickel. The brazing alloys of this invention will braze below 1850.degree. F, permit multiple braze cycles without remelting and provide joint service temperature to 1700.degree. F.

Abstract: The portable antenna assembly is for use indoors with a television receiver for receiving very high and ultra-high frequency television signal carrier waves radiated from transmitters located at varying distances and in different directions from the antenna assembly. The antenna assembly comprises a stand having a base member upon which is rotatably mounted a vertically extending antenna support member which carries first and second tubular antennas, each antenna being of generally rectangular configuration. The second antenna is located within the space subscribed by the first antenna and both antennas are located on the same side of the support member in generally the same vertical plane. The first and largest antenna is connected by a flexible cable to the very high frequency terminals of the television receiver and the second antenna is connected by a flexible cable to the ultra-high frequency terminals of the television receiver.

Abstract: A spot light assembly includes a support tube journalled upon a frame, having a handle assembly secured over one end of the tube and a head assembly secured over the other end of the tube and mounting a spot light. Rotation of the handle assembly in a vertical plane effects the corresponding angular adjustment of the spot light. A rotatable drive shaft within the tube at its ends extends respectively into the handle assembly and head assembly. An upright stud is supported in the head assembly. The handle assembly includes a handle rotatable in a horizontal plane. Intermeshing gears on the handle, on end portions of the drive shaft and on the stud are connected to the spot light whereby rotation of the handle in a horizontal plane effects a corresponding rotation of the spot light. The improvement lies in the drive shaft at one end being in brush contact with the stud.

Abstract: A blow mold structure for the blowing of containers, bottles or the like rein a coolant fluid is circulated through the mold. The blow mold includes a pair of openable and closable mold blocks, each carrying a mold insert. The changeable inserts cooperably define the mold cavity, and coolant fluid is circulated between each insert and the adjacent mold block to cool the cavity-defining inserts. A series of grooves is formed in the exterior surface of the mold insert, the insert is sealed to its mold block and coolant fluid is introduced into and removed from the grooves through supply passages in the mold block. A chamfered abutment at one end of each insert and a mounting flange at the other end insures quick changing of inserts while maintaining structural rigidity during use.

Abstract: The hydronic heating and cooling system includes a packaged or integrated outdoor combination heat and cool unit for both residential and commercial installations comprising control valve means for directing water or liquid through alternately an evaporator for cooling the liquid during the cooling mode of the system or a heater for heating the liquid during the heating mode of the system. With such a construction the liquid passes through the heater in both the heating and cooling modes of the system; however, the heater is energized only in the heating mode.

Abstract: A method and apparatus for rotatably driving phonograph records, memory disks or the like while substantially reducing if not eliminating the undesirably effects of mechanical vibration and drive speed fluctuations. A support frame houses a tank which holds a quantity of liquid such as a mixture of silicon oil and water. A first generally circular member having a plurality of spaced vanes thereon is mounted within the tank adjacent the bottom thereof so that it can be positively rotatably driven from a drive mechanism external to the tank. A second generally circular member having a plurality of spaced vanes thereon is positioned vertically above the first member so that it is free to rotate with respect thereto. At least a portion of the vanes of the second member extend downwardly into the liquid but remain vertically spaced apart from the vanes of the first member.

Abstract: Method for manufacturing blanks from a synthetic plastics material includes mould cavity defined between a mandrel and an outer mould. A retractable sleeve is slidably mounted on the mandrel and is displaceable within the cavity at a rate which depends on the rate at which the plastics material is injected into the cavity.

Abstract: When a metal piece is forced to undergo a 180.degree. bend with a press, in order that the outer end face of the bent portion be square rather than rounded, the portion to be bent is put in a die and buckled toward the folding line while bending is effected. Also a number of T-shaped projections radially extending from the outer periphery of an annular iron plate are formed with the lug portions of such projections bent so that the outer ends of the bent portions are formed flat.