Abstract: Apparatus for removing and disposing of scrap paper chips impaled on a roller rotating away from the cutting region of a rotary cutter has a pneumatic baffle plate located a distance of 3/8 to 11/2 inches away from the roller, defining a narrow flow channel through which an air stream is sucked by a centrifugal fan. The baffle is spaced apart from the roller a distance such as to impart a high velocity to the air stream due to aerodynamic effects, causing chips to be forcibly removed from the roller when the chips reach an area above the flow channel. The baffle along with a chute that supports it and duct leading to the fan provide an enclosed channel for movement of the chips. The baffle edge adjacent the roller is provided with a curved surface to provide smooth flow of the air stream. The output of the fan has an air duct connected for conveying the chips to disposal.

Abstract: The operating lifetime of mild steel stub ends in anode electrode assemblies for aluminum reduction cells is increased by providing a coating of stainless steel or other corrosion-resistant alloy on the stub end extending upward from its juncture with a carbon block anode in which the stub end is embedded. This prevents corrosion and resulting necking down of the stub, which would otherwise occur as a result of exposure of the stub end to fluorine or fluorine containing gases as well as solid particles. The coating may be applied by welding or metalizing procedures.

Abstract: A bearing chocking assembly for mill rolls includes an inner ring engageable with the bearing structure and having on its outer face axially inclined wedge-shaped cam surfaces. These surfaces are arranged to come into contact with similar mating surfaces on the inward face on an outer ring. Both of the rings have circumferential flanges with axial holes around their entire circumference to enable the flanges to be bolted together upon being rotated to effect axial positioning of the assembly. The inner ring rests on a surface of the mill roll shaft and is secured in place by a split thrust ring disposed in the shaft groove. This assembly enables a mill roll to be removed for regrinding and replaced without separating the rings from one another and avoids the need for removing a split inner adjustment ring from the groove. Provision of flanges with holes around their entire circumferences allows for fine adjustments over a wide range of positions.

Abstract: A double-containment thermoplastic pipe assembly provides for transfer of differential thermal expansion forces to rigid external supports. The assembly includes a flanged restraint coupling having an inner carrier pipe portion, an outer containment pipe portion, a wall connecting the inner and outer pipe portions, and a radially extending flange around the outside of the containment pipe portion. The flange is secured to an external support such as a manhole for underground system by being cast into the wall of a cast-in-place manhole or by being engaged by rings on each side of the flange for precast manhole systems. The outer pipe terminates at the manhole wall so that the containment function within the manhole is performed by the manhole inself. For above-ground applications, the coupling is secured by engagement of the flange with a cast concrete wall or metal saddle connected to an underground footing.

Abstract: A storage device for storage of socket wrenches thereon in end-to-end relation. The device is made of springy material and includes a body having extending arm portions with mutually engageable locking surfaces on the distal ends thereof. The locking action is accomplished as a result of one end member being biased against and retained against the second arm member as a result of the spring action of the material.

Abstract: An unvented gas-fired heater assembly including a base having a gas burner mounted thereon in a combustion area. Gas logs are disposed in the combustion area for heating by the gas burner. A duct assembly is provided which directs heated air from the heater assembly, and the duct assembly is height adjustable to change the height at which air is discharged from the unit. All of the components of the heater are assembled as a unit so that the unit is easily insertable and mountable in an enclosure sure as a fireplace.

Abstract: An acousto-optic correlator for wideband signals. The invention is defined by and relates to device in which a laser beam is split into two paths of a Mach-Zehnder interferometer arrangement. A first Bragg cell of which, modulated with a signal Re{S.sub.1 (t)exp(jw.sub.o t)}, receives the first beam that is reflected off a first flat mirror. A second Bragg cell of which, modulated with a signal Re{S.sub.2 (t)exp(jw.sub.o t)}, receives a beam that is reflected off a second flat mirror. The undiffracted light from both of the modulators is blocked. The diffracted light emitted from the first and second Bragg cells passes through first and second imaging lenses respectively. The two diffracted light beams are then combined with an angular separation between beams. The combined beam is incident upon a square-law detector array which is at the image plane of the imaging lenses. Due to the square-law detection process, terms of low frequency biases and complex correlation on a spatial carrier develop.

Abstract: Apparatus for a backyard golf practice range including a stake with an enclosed aperture that allows a looped cord to slide until the end of the cord loop is reached. A cold processed monofilament nylon cord, a golf ball with a bore allowing the ball to slide over the cord, and a keeper plate for securing the cord ends together to form a loop are also included. The keeper plate has two sets of three holes each through which the cord ends are threaded in a prescribed manner to provide a secure connection. The required structure for the golf ball and suitable cord and bore sizes are also given.

Abstract: Apparatus for excavating ballast from a railroad bed adjacent to the cross ties of a railroad track and for cleaning the excavated ballast for return thereof to the railroad bed. The apparatus includes a vehicle for supporting a pair of excavating assemblies on opposite sides of the support vehicle and thus on opposite sides of the railroad track and a discrete cleaning station for each of the separate excavating assemblies. Each cleaning station is disposed for receiving and cleaning the ballast excavated by the associated excavating assembly.

Abstract: An aerator device for attachment to the front end of a power riding lawn mower has two features which enable a spiked roller assembly to guide itself smoothly through a desired path and to make turns without excessive digging in of the spikes. The roller assembly includes a plurality, and preferably three, of rollers disposed coaxially on a shaft with each roller being rotatable independently of the others, facilitating turning. Self-tracking of the rollers on a desired path is provided by vertical mounting of a pivot pin connected to the roller assembly in a journal supported by a frame forward of the roller axis. The roller assembly pivots to follow the frame journal without operator intervention when propelled forward.

Abstract: Perforated plate heat exchangers and cryocoolers based on plates with extremely small, tubular holes are disclosed. The plates may have hole diameters down to the low micron size range and length-to-diameter ratios above unity and from 2 to 6 for typical applications. Such perforated plates function as tubes rather than screens and provide high efficiency, especially for compact cryocooler applications. The plates, which are made of a high thermal conductivity metal, and alternating spacers of low thermal conductivity material are disposed in an elongated stacked array of a large number of units such as 100. For use in a recuperative heat exchanger for a cryocooler employing the Linde-Hampson cycle, webs at the plate and spacer edges and a strip across the middle define two flow chambers, one for gas flow in each direction. One end of the array communicates with a high-pressure gas inlet for introducing gas in one chamber and a low-pressure gas outlet for removing gas from the other chamber.

Abstract: A measurement system for measuring discrete voltages of serially connected battery modules making up a battery power supply wherein there would be connected to each junction between cells one terminal of a dual-level voltage responsive switch and wherein the other terminal of each switch is connected to a common terminal. The switches are identical, and each would close at a first voltage across it and open at a second, slight higher, voltage. A ramp voltage is generated and connected from the common terminal and the high voltage terminal of the supply. The ramp voltage and current through this circuit are concurrently measured and displayed wherein the difference in voltage between the appearance of two current pulses is illustrative of the battery voltage of the battery module connected between switches giving rise to the current pulses.

Abstract: An insulated concrete building panel having an internal slab of insulating material, layers of concrete on each of the slab faces, and a concrete frame around its edges. One face of the slab has a pattern of grooves into which concrete is cast to provide ribs that are cast integral with the outer layer on that face. The other face has ridges, preferably of trapezoidal cross section that, when placed upon a bottom layer of cast but uncured concrete, become intermeshed with the bottom layer. The panels are prepared by first casting a layer of concrete on a horizontal surface, placing the slab, grooved face up, on the cast but uncured layer, and casting concrete over the grooved face, into the grooves and around the slab edges. Panels having this structure are useful for constructing buildings such as warehouses where long panel lengths of concrete inner face and internal insulation are needed.

Abstract: An apparatus and method for lifting, inverting, and stacking trailer chassis has a pair of support arms engageable with arms of a forklift vehicle and a frame pivotally mounted on outer ends of the support arms. The frame is mounted by engagement of pivot pins on the arm ends with apertures in side members of the frame, the apertures being located inwardly from the center of the length of the side members. This off-center placement of the axis of rotation of the frame enables it to be rotated when the forklift arms are raised without requiring power other than normal forklift lifting power. Clamps including a fixed L-shaped bracket and a cooperating slideable bracket are provided on the underside of the frame for engaging chassis beams of a trailer. A locking pin for securing the frame in a position generally coplanar with the support arms is also provided.

Abstract: A missile launcher assembly for launching a missile from an airborne, shipborne, or ground-installed platform has a carriage mounted for limited forward and rearward movement on a track provided on the platform. The carriage supports the missile in fixed relation to the carriage by hooks having an inclined surface that engage mating surfaces within the missile body and a pivotally mounted restraint pawl that engages a surface within the missile body so as to keep the missile from sliding off the hooks. A camming surface engageable with a pawl-restraining rocker link is located on the platform so that when the missile and carriage are moved forward upon ignition of the missile motor, the front end of the link is cammed downward, forcing its rear end upward and releasing the pawl. The pawl, upon being released, rotates upward out of the missible body, allowing the missible to slide off the hook.

Abstract: A sustained-release, perfume-containing coating is provided for applications to advertising samplers and the like. A coating is made up of perfume oil having dissolved therein a suitable polymer, and particularly ethyl cellulose, in an amount sufficient to provide a specified viscosity that enables ready application to a substrate by printing and prevents interaction of fragrance oil with a printed image. Advertising samplers having such a coating applied to a paper substrate are also disclosed. The samplers may have a printed image applied thereto underneath the perfume-containing coating. The polymer in the perfume oil serves to modify the oil so as to cause the fragrances therein to be released slowly and without premature release of top-note components. This measure also prevents degradation of the perfume oil from inks used to print images on the sampler.

Abstract: A ribbon cassette having top and bottom enclosures forming a cavity including a ribbon storage compartment. Ribbon drive means, which includes a pair of spaced elements, is mounted in the cavity for engaging or "pinching" the ribbon therebetween for advancement into the storage compartment. One or both of the elements may be a gear. When only one element is a gear, the other element is a spring assembly. A combined gear support and "stripper" assembly is molded with the upper and lower enclosures and serves as a support for rotatably supporting the gear or gears in the cavity while also preventing the ribbon from winding around or otherwise binding to the gear or gears.

Abstract: An extendible hose assembly for extending from a .Iadd.holding tank of a .Iaddend.portable toilet service truck or similar service vehicle to a portable toilet or similar tank to be serviced. The assembly has two rotational hinges for horizontal movement of hoses and at least one hinge allowing vertical movement of hoses. The combination of hinges allows the hoses to be extended for use in any direction from the .Iadd.tank carried by the .Iaddend.service vehicle .Iadd.and to be compactly folded in substantially "side-by-side" relation longitudinally along the length of the holding tank.Iaddend..