Abstract: The present proposal comtemplates an anti-theft device for unattended trailers, in the nature of a cover-plate assembly for locking the open end of the trailer tow bar to prevent unauthorized removal of the trailer as by connecting the open end of the trailer bar to a peg on a towing vehicle. The assembly may comprise an underplate with a centrally disposed pintle and an apertured overplate or coverplate constructed and arranged to coact with the underplate to effectively prevent access to the opening at the end of the tow bar. For convenience, the two plates may be joined in spaced relationship as by a steel cable fixed at its ends, respectively, to the top side of the coverplate and to the reverse side of the underplate.

Abstract: Air quench extrusion apparatus and method are described for extruding yarn from polyolefin material. The yarn is first extruded downwards into a hot zone surrounded by a shroud, and then passes through a quenching zone across which cooling air, or gas, is moved to cool the yarn. Immediately adjacent the lower end of the quenching zone is disposed a denier control roll for pulling the yarn out of the quenching zone at a controlled rate causing the yarn to be drawn down in denier in the hot zone. The hot zone is small in volume relative to the quenching zone and contains quiescent air at a temperature close to that at which the material is extruded. The height of the apparatus from extrusion to the denier control roll is less than 10 feet, allowing the apparatus to be located in a single story building. At least two multi-filament yarns are simultaneously extruded into the hot zone which is rectangular in cross-section.

Abstract: A brick comprising in combination a body element having oppositely disposed ends and spaced apart surfaces intermediate the ends, with the body element having a pair of elongated cavities extending between the oppositely disposed ends and through the spaced apart surfaces and a channel extending between the cavities. An aperture extends between each cavity and a respective one of each of the ends. Electrical lighting components are mounted in each of the cavities and include a light bulb socket secured to a wall of the cavity, a light bulb secured in the socket, first electrical wires connected to each light bulb socket through the channel, and second electrical wires connected to each light bulb socket and exiting from the body element through each aperture, such that adjacent bricks may be wired together.

Abstract: A system for converting an electrical signal to a number of pulses and counting those pulses to provide a digital signal related to the average of the original electrical signal. An accurate electronic clock is included to provide time information and to determine the period of measurement and of averaging. Digitized signal, average, and time information are displayed and provided for interfacing with other digital equipment. An output analog signal is derived alternately from the digitized input signal and from its average.

Abstract: A multiple sensing device has sensors, mounted on a common rotatable shaft, for sensing magnetic field, electric field, gas flow, angular acceleration and linear acceleration. The latter three of the sensing devices employ piezo electric crystals as the sensors, while the magnetic field sensor employs a pair of rotating coils and the electric sensing device employs a pair of rotating electrodes.

Abstract: In a hemodialysis system including a dialyzer having a semi-permeable membrane, apparatus for accurately proportioning and mixing fluids comprising a double acting piston/cylinder unit of which the cylinder is divided into two chambers by the piston and the volume of the cylinder swept by the piston at one end of the piston is lesser than that at the other end. An inlet connection for first liquid is made to one chamber, a conduit connects the two chambers and includes a connection to a source of the second liquid. Valve means are associated with the conduits and are effective to cause a charge of first liquid to be delivered to the one chamber and thereafter to be transferred to the other chamber, drawing liquid from the source of the second liquid to make up for the difference in volume. Said valve means then cooperate to cause the mixed liquids to be discharged from the other chamber as said one chamber is again charged with said first liquid.

Abstract: A fire extinguisher of the type comprising a burstable container adapted to provide a high mass flow rate of discharged extinguishant is provided with venting means so adapted to direct the flow of extinguishant from the container that the reaction forces upon the container during discharge of extinguishant compensate one another to reduce the resultant force upon the container.

Abstract: In can manufacturing apparatus there is provided an overhead magnetic conveyor for transferring cans from a conveyor upon which they are coated to a conveyor upon which the cans are dried. To remove excess coating material which tends to form a bead around the lowermost edge of a can, a bath of coating material solvent is disposed adjacent to the transfer conveyor and has within it an endless belt conveyor to which cans on the overhead conveyor are caused to fall and from which those cans are subsequently returned to an overhead conveyor. The upper, can carrying course of the endless belt conveyor is disposed at a predetermined depth below the surface of solvent within the bath so that excess material accumulating on the lower portions of the cans in the coating region is removed prior to entry of the cans into the drying oven.

Abstract: A method of extruding multi-filament polypropylene yarn in which the polypropylene is extruded at a temperature below 425.degree. F., such as in the range 415.degree. F. to 350.degree. F., particularly about 400.degree. F., into a hot zone having a temperature sufficiently high to retard cooling of the extruded polypropylene yarn. The temperature of the hot zone can be within 60.degree. F. of the temperature of extrusion. The yarn is then passed through a quenching zone across which air is blown to cool the yarn. The swell value of the polypropylene can be less than 3 and its melt flow may be greater than 30. The yarn is drawn down in the hot zone and the filaments may be drawn down to an undrawn denier of less than 40.

Abstract: Apparatus and method are described for extruding filaments of thermoplastic material, particularly polypropylene, by liquid quench melt spinning in which a baffle arrangement is disposed in the quench liquid around the location where the filaments enter to reduce turbulence, vortexing, and liquid level variation. The baffle arrangement forms an opentopped box-like structure with two quench liquid inlet apertures and one quench liquid outlet aperture. Yarn guides are disposed inside this structure and the filaments, after solidifying, pass around the yarn guides and then upwards, at an angle of about 30 degrees to the horizontal, through the quench liquid outlet aperture. The passage of the filaments creates a pumping action of the quench liquid in through the two inlet apertures and out through the outlet aperture. The area of the outlet aperture is less than the sum of the areas of the inlet apertures, to create an inefficient pump.

Abstract: A piston/cylinder type element particularly suited for embodiment in a refuse compactor as the ram thereof comprises adjustable guide means for guiding the piston-like element in sliding movement within the cylinder. The guide means are adjustable to accommodate wear in the mating surfaces thereof. There is also disclosed a discharge cone for a compactor which is releasably secured to the ramhousing structure in a selected one of a plurality of positions evenly to distribute wear on the cone produced by the passage of refuse therethrough and that cone is removable from the ram housing to be replaced by a different structure, depending upon the refuse to be compacted. Additionally, the ram member of a compactor includes novel teeth elements to cut through refuse which might otherwise be wedged between adjacent surfaces of the ram and cylinder and cause jamming.