Abstract: A method of controlling the erosion of a refractory threshold over which molten glass flows transverse to the longitudinal centerline thereof, which includes preferentially cooling the central portion of the threshold while maintaining the marginal edge portions at a temperature above the liquidus temperature of the molten glass. A cooling fluid conduit extending longitudinally through the refractory threshold is thermally insulated adjacent its end portions, thereby localizing the cooling effect towards the central portion of the threshold.

Abstract: A glass edge multiple glazed unit having fillets of substantially uniform thickness is produced by the application of heat to marginal edge portions of adjacent sheets, followed by a delay sufficient to establish a substantially uniform, greater than fusing temperature condition in the body of fillet-forming glass. The fused sheets are thereafter drawn apart a preselected distance to a spaced-apart face-to-face relation to form a glass-edge multiple glazed unit.

Abstract: An adhesion-promoting primer, e.g., an emulsion polymer, is employed to bond organic elastomers to silicone elastomer adhesives. A multiple glazed unit having an organic elastomer sealant about its periphery is mounted into a curtainwall system by first coating the exposed organic elastomer sealant with a suitable primer before bonding the multiple glazed unit to the curtainwall system with silicone elastomer adhesive.

Abstract: A method of vertically positioning ribbon engaging devices in a glass forming chamber includes suspending a contact member within the chamber a known vertical distance relative to the device, moving the contact member toward the surface of a pool of molten metal contained within the glass forming chamber while moving the device to maintain the known vertical distance; and generating a signal when the contact member engages the pool of molten metal to indicate that the device is vertically positioned said known vertical distance from the surface of the pool of molten metal.

Abstract: The marginal edge portions of an accelerating ribbon of float glass are engaged by a plurality of opposed pairs of attenuating devices, each pair exerting substantially equal forces. The pairs of attenuating devices are positioned longitudinally adjacent one another such that the ratio of the ribbon width intermediate adjacent pairs to the average of the ribbon widths at each pair is greater than 0.95. The attenuating devices may be edge rolls each rotating with a peripheral velocity a predetermined amount greater than the linear velocity of the ribbon immediately upstream.

Abstract: A method and apparatus for the control of reactive sputtering deposition of oxide-containing films, including the monitoring of and maintaining the constancy of the deposition rate and total pressure of the system by adjustment of the oxygen and argon input flow rates. Deposition rate is monitored by an activated quartz crystal, and behaves as a sensitive function of actual oxygen partial pressure. Stoichiometry, optical and electrical properties of the oxide-containing films are therefore controllable by maintaining constant oxygen partial pressure.

Abstract: An electroconductive laminated window having an electroconductive coating applied to one interior substrate surface with a pair of bus bars electrically connecting a source of electrical potential thereto. The bus bars include an electroconductive layer having volume resistivity less than about 10.sup.-2 ohm-cm interposed between and conformable to the surface configurations of the electroconductive coating and a flexible metallic current carrying member. The metallic current carrying member is preferably a mesh of thin copper foil which is substantially bendable in its own plane, and the electroconductive layer is preferably a metallic layer substantially free of non-metallic components, consisting of a mixture of finely divided electroconductive particles and finely divided metal alloy particles having a fusion temperature between about 70.degree. C. and about 150.degree. C.

Abstract: Shaping a glass sheet between pressing molds of complementary curvature while the glass sheet moves continuously from a furnace exit to a cooling area by moving the molds synchronously with the glass sheet and simultaneously toward and away from one another in such a manner that their relative orientation to one another is not changed during glass sheet engagement.

Abstract: An edge roll apparatus for engaging the marginal edge portion of a hot ribbon of glass, including a body portion and circumferentially positioned teeth. The teeth are shaped to establish at least a 90.degree. angle between the surface of the glass and the leading and outwardly directed edges of the teeth during at least one half of a tooth's engagement path to improve gripping ability.

Abstract: A burner tip for passing fuel into a glass melting chamber having a fuel passageway and discrete cooling fluid passageways therein for cooling and shielding the burner tip from attack by a hostile gaseous chamber environment. A ceramic collar member is provided for minimizing inspirated air and cooling fluid may be passed through the burner tip during both the firing cycle and off-firing cycle. The burner tip is provided with small diameter cooling fluid passageways to establish a low volume, high velocity flow of cooling fluid sufficient to shield the burner tip from sting-out attack.

Abstract: Apparatus for engaging the marginal edge portion of a ribbon of molten glass is mounted to the exterior sidewall of a float chamber below the sidewall opening and above the floor level. The vertical arcuate movement of the elongated barrel is controlled by a pair of screw jack assemblies symmetrically positioned on opposite sides of the longitudinal centerline of the barrel, themselves controlled alternatively by a motor or manual driving force. The motor may be back-driven by the manual control to provide both remote and manual fine tune capabilities. The elongated barrel includes an outer tubular member and an inner rotatable tubular drive member which is supported therein by a heat resistant toroidal bushing near its insertable end and by a precision bearing near its drive end.

Abstract: An edge engaging device for attenuating a ribbon of float glass having a single elongated barrel and a plurality of operatively interconnected edge rolls secured near one end thereof. The edge rolls are rotatable about a generally horizontal axis angularly related to the longitudinal center line of the elongated barrel, and means are provided to adjust the angular relationship thereof.