Abstract: A valve assembly has an outer body with an internal passageway for gas containing a valve seat and a valve member which can be lifted from the valve seat by rearward pressure. An inner body is threaded in the passageway, and itself includes an internal passage and a plunger within the passage. The plunger has a forward hollow sleeve portion and two arms extending rearwardly at diametrally opposite positions, the arms being linked at their rearward ends by a bridge from which extends an activating member adapted to hold the valve member away from the valve seat. The plunger has a sealing member forwardly of the activating member for closing the internal passage when the plunger is in a forward position. The inner body has two opposed grooves to receiving the arms, thus interlocking the plunger and the inner body so that rotation of the one requires rotation of the other. The bridge portion can be engaged by a forked tool for rotating it.

Abstract: A valve assembly for dispensing a gas, particularly for medical use into a connector of a gas using device, comprising: an outer body with an internal passageway containing a valve seat and a valve member which is lifted from said seat by rearward pressure, an inner body threaded into the passageway of the outer body and having an internal passage and a plunger within said passage which includes an activating member adopted to hold the valve member away from the valve seat when the plunger is moved rearwardly, the plunger and inner body having interlocking parts by which rotation of the plunger requires rotation of the inner body, said inner body has a stepped profile on the outside for mating with a complementary stepped bore in the outer body and a stepped bore on the inside for mating with a hose connector.

Abstract: A fence structure is described consisting of modular panels mounted on posts. The modular panels are of thermoplastic or thermoset material having a rail portion and a connector at each end for fitting over the posts. The connector has an integral expansion joint in its central passage and each connector is offset in opposite directions to the longitudinal center of the panel to provide a hinged effect with the connectors of adjacent panels in the fence. The construction is readily adaptable to sloping ground and variation in height between panels and provides simplified installation by easy alignment.

Abstract: A method for determining the optimum component ratios in an exothermic process for producing polyurethane foam is described which consists of continuously measuring the temperature differential with respect to time and then determining the optimum component ratios by comparing the maximum value of each of the sequential temperature differential peaks and the times at which they occur.

Abstract: This invention provides an improved method for employing a plasma-arc cutting torch to cut a metal plate. The improvement consists in operating the torch with its lower portion submerged in a layer of water provided over the workpiece. In order to allow automatic adjustment of the torch to the appropriate working height above the workpiece, a mechanism is provided for mounting the torch with respect to the support carriage which guides its horizontal path. This mounting mechanism is such as to allow relative up and down movement between the torch and the support carriage and includes a detecting mechanism including a frame and vertical slides on which the cutting torch is secured so that when the mounting mechanism is lowered to the point where the torch touches the metal plate, the detecting mechanism communicates a signal for the upward movement of the mounting mechanism thereby raising the torch to a predetermined cutting distance from the metal plate.

Abstract: A process for dispersing fine particle size carbon blacks in low density polyethylene whereby an initially prepared carbon black--low density polyethylene masterbatch, consisting of from 20-50 percent by weight carbon black, is let-down by intensive mixing, in a dry blended mixture of low density polyethylene and high density polyethylene, or propylene polymer, to form an intermediate masterbatch, which is further let-down in low density polyethylene by a second intensive mixing stage. The proportions of each component are chosen to yield a final product consisting of (on a weight basis) from 1-5% carbon black, 1-10% high density polyethylene or propylene polymer, and at least 50% of the remainder being low density polyethylene.

Abstract: A process for embossing a twin-web of film is described wherein a length of two superimposed webs of film are heated to a temperature above the vicat softening point, then passing the webs between a pair of embossing rolls at least one of which has an engraved surface which is sufficiently cooled to cool the webs to a temperature below the vicat softening point. The embossed webs are then passed into the nip of a pair of counter rotating driven rolls each having a high friction surface, separating the webs downstream of the nip by each of the webs maintaining contact with the surface of its respective driven roll, releasing each of the webs from its respective driven roll by continuing its passage over a co-operating pick-up or nip roll and then drawing each of the webs to separate wind-up stations.

Abstract: A film forming composition was prepared which comprises a homogeneous mixture of (a) from 2% to 10% by weight of polyisobutylene having a Staudinger molecular weight of from 3,000 to 50,000; (b) from 3% to 20% by weight of an ethylene-propylene copolymer rubber having a melt index of from 0.2 to 2.0 dg/min. and an ethylene/propylene copolymerization ratio of from 30/70 to 70/30 and (c) the remainder of the mixture being an olefin polymer selected from polyethylene having a density of from 0.915 to 0.930 gm/cc and a melt index of from 0.3 to 5.0 dg/min. and an ethylene-vinyl acetate copolymer wherein vinyl acetate comprises up to 20% of the copolymer. Film prepared from the composition exhibited improved cling properties down to at least -40.degree. C.

Abstract: A battery canister is described which comprises a plurality of electrically conductive trays of polygonal configuration each containing a set of drycell batteries set firmly in position whereby the negative terminals of the batteries are connected in parallel by contact with the base of the tray. The trays are stacked one above the other wherein the positive terminals of one set of batteries are in series contact with the batteries directly above them through pressure contact through the tray. The trays are sealed within a casing and electrically insulated therefrom with the base of the bottom tray being connected to a negative terminal on the casing and the positive terminals of the top tray being connected to a positive terminal on said casing, thereby reducing the number of soldering points required for the canister construction.