Abstract: A process and apparatus for preheating glass batch ingredients is disclosed. The invention uses a heat exchange method that preferably employs furnace exhaust gases. The heated batch then is fed to a glass melting furnace.

Abstract: The device for proportioning a gaseous fuel and air for combustion in an internal combustion engine includes a plate-like first member having a peripheral edge portion and a second member cooperating with the first member having a peripheral edge portion and a second member cooperating with the first member to define a mixing chamber having an outlet adapted to be connected in communication with the air intake of the engine carburetor. The second member also includes an annular portion having an arcuate first wall which is convex to and spaced from the peripheral edge portion of the first member to define an annular venturi having an inlet in communication with the atmosphere and an annular outlet in communication with the mixing chamber. A base member or second wall cooperates with the arcuate wall to form a substantially closed, annular plenum chamber into which a gaseous fuel, such as natural gas, is admitted when the engine is to be operated on the gaseous fuel.

Abstract: A container between the output of a melting furnace wherein the molten mass is also refined, such as for glass, and the ducts to a plurality of forming machines comprising a larger first zone and a plurality of smaller second zones corresponding to each forming machine, in which container the molten mass is controlled in temperature above and below its liquid level as it flows through the first and second zone toward a forming machine so that the cross-sectional area of the molten mass at the outlet duct from each second zone has substantially a uniform temperature.

Abstract: A process for feeding scrap glass to a glass melting furnace is disclosed. The scrap glass is fed onto a blanket of batch in the furnace so that organics are burned off before the scrap melts.

Abstract: An apparatus for bending a glass tube to a U shape having a pair of chucks for holding the glass tube at both sides, a heating device for heating and softening the glass tube held by the chucks at the predetermined zone for bending, and a turning mechanism for the chucks. The turning centers of the turning mechanism are set each at positions located at a predetermined distance inwardly from an axis of the unbent glass tube held by the chucks. The distance between the turning centers is less than the distance between the axes of straight zones of the glass tube formed after bending. There is also a bending drum for guiding bending, which drum moves forwardly and backwardly into and away from the predetermined zone for bending of the glass tube.

Abstract: Process for manufacture of plate glass including pouring molten glass onto a bath of molten metal (4) contained in a tank having side wall (1), an inlet wall (2) and an outlet wall (3). The glass is advanced by means to form a glass ribbon (7) and extraction means draw the ribbon in a glass drawing space (II and III). Pairs of baffles (13 and 14) are positioned in the drawing zone between each side edge of the ribbon and the side walls to limit upstream flow of cooler molten metal in a direction towards the inlet wall.A device for manufacture of plate glass including a tank having an inlet wall (2), an outlet wall (3) and side walls (1) for holding a bath of molten metal (4) onto which molten glass is poured by feed means (6). The glass is advanced by advance means (9) in a drawing space to form a ribbon (7).

Abstract: Appratus for automatically removing stuck and down ware from an automatic glassware forming machine conveyor produces a first signal for each item of normal ware, stuck ware and down ware which is conveyed past an inspection location. Each of the first signals has a duration corresponding to the time required for passage of the corresponding item past the inspection location. In order to prevent the generation of spurious first signals, two spaced radiant energy beams are sensed which are directed transversely across the transport path of the wares and which are in coplanar alignment perpendicular to the transport path of the wares. A first one of the beams is aligned with the bases of upright wares and the other of the beams is aligned above the first beam. The first signal is produced if either of the beams is interrupted.

Abstract: A process for preventing deposits in the pipes of waste heat boilers employed for cooling gases in the partial autothermal oxidation of fossil fuels to prepare hydrogen or synthesis gases, wherein the pipes are flushed, at the operating temperature, with hydrogen-containing gases which contain little or no H.sub.2 S.

Abstract: Quartz glass includes iron and aluminum. The total iron content ranges from 0.01 to 5% by weight, and the total aluminum content ranges from 0.01 to 10% by weight. The quartz glass exhibits infrared rays-absorbing ability and visible light-transmitting ability. Also a process for making such a quartz glass is disclosed.

Abstract: A delivery system for use for delivering gobs of glass from a plurality of feeder orifices to a plurality of sets of a plurality of blank molds. The blank mold sets are rotated about a central axis with each blank mold of each set being positioned a different radial distance from the axis. The delivery system includes individual gob guiding units each having a lower end positioned over its associated blank mold as each set of blank molds are rotated underneath. The lower end of each unit is moved at a different relative tangential velocity to match the different relative tangential velocity of its associated blank mold. The scoops of the gob guiding units are independently moveable into and out of their feeding positions.

Abstract: An improved lead-free glass or glass plus alumina ceramic sealing material composition for making compression glass sealed electrical leads in semiconductor device packages is described wherein the improved sealing material consists essentially of the following range of ingredients, by weight percent:______________________________________ Pb-Free Glass Element Composition Range Glass Plus Alumina ______________________________________ SiO.sub.2 40-50 34-50 Al.sub.2 O.sub.3 2-12 2-25 K.sub.2 O 2-6 2-6 Na.sub.2 O 5-9 4-9 Li.sub.2 O 2-6 2-6 CaO 0-4 0-4 ZnO 5-12 4-12 BaO 1-5 1-5 TiO.sub.2 2-6 2-6 B.sub.2 O.sub.

Abstract: Hot glass panes are displaced without sagging through a treatment station, such as an oven, on a roller grate which is linearly reciprocated while the rollers of the grate receive a translatory angular velocity component and an angular oscillation so that the velocity at a glass pane relative to the traveling grate is R.multidot..omega..sub.osc +R.multidot..omega..sub.trans, where R is the radius of the rollers at a point of contact with the pane, .omega..sub.osc is the angular oscillation velocity component of the roller displacement and .omega..sub.trans is the angular translatory component.

Abstract: A glassware forming apparatus including at least one split below mold moveable between an open and closed position. At least one bottom plate is mounted on the machine for movement into and out of engagement with the blow mold. The means for moving the bottom plate is separate from the means for moving the blow mold. Additionally, a mechanism is provided for moving the bottom plate toward the blow mold along a path in which the bottom plate first pivots about a fixed pivot point and then moves along a straight line coaxial with the axis of the blow mold.

Abstract: A method and installation for cleaning a squeegee device. The installation includes a housing with a door through which the squeegee device can be introduced and mounted in a tiltable supporting element. After the closing of the door the squeegee device is internally and externally flushed and rinsed by means of a number of stationary and traveling spraying nozzles through which a cleaning liquid is sprayed upon the squeegee device.

Abstract: An apparatus and method is disclosed for cooling a molten stream of glass flowing in a firebrick hearth from an entrance end to an exit end of a glass furnace forehearth, the method comprising the steps of: cooling the bottom of the hearth which cools the molten glass by forcing air through ducts in the hearth bottom insulation; cooling each side of the hearth which cools the molten glass by forcing air through ducts along the side of the hearth.

Abstract: An apparatus for analyzing biological liquids comprises a measuring block including measuring means for measuring characteristics of said liquids. The measuring block is mounted within a thermal shield or housing by means of a base member interconnecting a minor part of the inner wall of the housing and the measuring block so as to define a space between the inner walls of the housing and the measuring block, said space being filled with air or another medium having a poor thermal conductivity.The thermal shield or housing and the base member are made of a material with good thermal conductivity, and heating and/or cooling means are arranged in heat conductive contact with the said shield. The function of the heating and/or cooling means is controlled by a temperature sensor arranged in heat conductive contact with the measuring block, so as to maintain the temperature of said block at a substantially constant predetermined value.

Abstract: The invention comprises an injection tank for cleaning boilers and heat exchangers. The tank is pressurized by connection to a potable city water supply. The filling, pressurization and injection of cleaning of treatment materials are carefully controlled by the provision of control and check valves on the inlet and outlet of the tank. An interior perforated tank baffle assures that the treatment materials are fully cleared from the tank during injection and thoroughly mixed with pressurized incoming water. The tank is light and portable without requiring separate powered pressurization means.

Abstract: A decorative vitreous article is produced by blowing a glass parison in a mold against a coherent flexible web of glass fibers which thereby become partly or entirely embedded therein. After reheating, possibly by immersion of the parison in a bath of molten glass to cover exposed web portions by a further glass layer, the resulting body is blown into its final shape.

Abstract: The invention provides a method and apparatus for the manufacture of glass film having a thickness not in excess of 0.003 inches and accomplished by drawing the film through a narrow slot-like orifice. The walls of the orifice are defined by an electrically conductive, hot glass resistant metal and electrical currents are introduced into the metal walls of the orifice to effectively maintain the central portions of the orifice walls at a higher temperature than each of the two lateral end walls of the orifice, thereby producing a temperature differential in the drawn film on the order of 40.degree. F. between the edges of the film and the central portions of the film.

Abstract: A method and an apparatus for the heat treatment of a float glass ribbon in which a tunnel lehr is provided with arrays of parallel heat-exchange tubes above and below the path of the ribbon and for each of the longitudinally divided zones of these arrays, the tubes are grouped and provided with respective heaters at the upstream end of the zone while all of the tubes at the zone are connected to a flow at the downstream end for drawing the heated air through the tubes. The temperature of the glass ribbon is measured at the upstream end and the throughflow of the individual groups is controlled selectively to ensure a homogeneous temperature distribution in the glass ribbon.