Abstract: This invention is a cable core made of two layers of helically wound strips of metal with one layer having a right hand lay and the other layer having a left hand lay. The angle of lay is such that the diameter of the core changes at a faster rate than the length of the strips change with differences in temperature. This increase in the change of the core diameter makes the change correspond more closely to that of a plastic jacket or insulation that surround the core and thus avoids excessive stresses in the insulation as it cools and resulting cracking of the insulation in the case of substantial changes in temperature. The angle of lay of one layer is different from that of the other layer so as to set up restraint conditions that provide stability for the composite construction.

Abstract: This invention conveys full and empty bobbins between different locations in a manufacturing facility for making communication cables. Most of the manual handling of the bobbins is eliminated by having a closed loop conveyor on to which bobbins are loaded and from which bobbins are ejected at selected locations; and the invention provides lift members for automatically spacing the bobbins on the conveyor at a location between a loading station and the next ejector. The spacing is accomplished while the conveyor is in continuous motion.

Abstract: This specification describes an improved method for making a container that has a square bag construction at its lower end and an upper end constructed as a folding box. The method produces such a container with a flexible handle that is permanently attached to the container in contrast with the prior art where economical construction requires that the user attach a separate handle to the container. With this invention, changes in the reinforcing of the upper panels of the container and a novel sequence in the manufacturing steps make the provision of a permanently attached handle both economical and practical. The product has novel features of construction that make it possible to manufacture the product on automatic machines which make conventional shopping bags and with limited alterations in the standard shopping bag machines.

Abstract: The valve element of this invention is generally cylindrical and has poppet valves at both ends for contact with seats at opposite ends of a chamber in which the valve element moves. Cylindrical side walls at each end of the chamber prevent interflow between ports during movement of the valve element from one end of its stroke to the other. For sub-sea use on offshore drilling well heads, a spring that moves the valve element in one direction is in a chamber sealed from an adjacent chamber to which the ambient sea water has access. Apparatus for pilot operation of the valve element has spaced, aligned bearing guides for guiding the valve element on opposite sides of an intervening chamber that holds the sea water.

Abstract: This specification discloses a cased-in book with overhanging hard covers; and a filler in the book made up of sheets having reading matter and/or pictures thereon, and the filler also includes a thick panel, made of material such as styrofoam, with one or more sockets in the thick panel for holding a sound record, preferably a tape cassette; and another socket, if desired, for holding transparent slides. The record and the transparencies provide audio-visual adjuncts to the material set forth in the bound pages of the book.

Abstract: Water sprays and foam, of the type used for fire fighting, have been used for dust suppression; but were not effective in removing the smaller particles from dust laden air. This invention uses a foam of high film strength that makes possible the bending of the foamed film to shorter radiuses of curvature and resultng smaller bubbles. Such a foam can be used to remove all of the detectable particulate matter from dust laden air or other gases.