Abstract: The apparatus for monitoring respiration comprises a photoplethysmographic sensor whose LED transmitter element(s) is/(are) excited by a monitoring unit with a specified control power and/or control signal sequence or frequency. By means of a signal processing unit, both the frequency and depth of respiration can be measured, as can the pulse frequency or oxygen saturation of the peripheral blood. The use of such an apparatus guarantees significantly more reliable monitoring of respiration than the impedance pneumographic methods of the prior art.
Abstract: A lightweight vacuum pickup is constructed using a honeycomb platen as the sheet engaging member of the pickup. The cells of the honeycomb platen are selectively sealed to control the amount of vacuum drawn through the platen. When used to transfer heat softened glass sheets, the lower sheet engaging surface of the platen is sealed with a dense material cloth which restricts airflow therethrough. The cloth includes holes positioned within the periphery of the glass sheet to be engaged by the pickup.
Type:
Grant
Filed:
September 2, 1992
Date of Patent:
November 9, 1993
Assignee:
PPG Industries, Inc.
Inventors:
George R. Claassen, James H. Schwartz, Thomas L. Waterloo, Richard V. Posney
Abstract: A glass, which is particularly adapted to be melted in conventional glass melting furnaces and formed on a molten tin bath, and which demonstrates exceptional absorption of X-rays with a minimum linear absorption coefficient, measured at 0.6 Angstroms, of 24/cm. and having excellent resistance to electron browning and/or X-ray browning and contains the following components, by weight percent: SiO.sub.2 and Al.sub.2 O.sub.3 constituting about 57.0 to 68.0% with SiO.sub.2 constituting about 57.0 to 66.0% and Al.sub.2 O.sub.3 constituting about 0 to 5.0%; K.sub.2 O and Na.sub.2 O constituting about 10.0 to 18.0% with K.sub.2 O constituting about 7.0 to 11.0% and Na.sub.2 O constituting about 4.0 to 8.0%; BaO and SrO constituting about 16.0 to 24.0% with BaO constituting about 0 to 13.0% and SrO constituting about 11.0 to 21.0%; and CeO.sub.2 constituting about 0.1 to 1.0%.
Abstract: The electrical connections for an electrically heatable windshield are sealed prior to the laminating operation to prevent gas from entering the interior of the windshield through the bus bar leads when the windshield is subjected to the elevated temperatures and pressures of the laminating operation.
Abstract: A terminal connector for a heated window, a heated window provided with a plurality of terminal connectors constructed and arranged for simultaneous engagement to corresponding terminals of a multiple terminal housing and a method of assembling a heated window provided with at least two of said terminal connectors in a terminal connection area along a side edge of said heated window.
Type:
Grant
Filed:
November 1, 1990
Date of Patent:
May 4, 1993
Assignee:
PPG Industries, Inc.
Inventors:
John A. Winter, Bruce A. Bartrug, Harry S. Koontz
Abstract: A plurality of coated strands are conveyed through a drying oven. A plurality of nozzles impinge the upper surface of the coated strand as it passes therethrough. Baffle plates positioned below the strands redirect the gas stream such that, after the gas stream has passed through the strands, it is redirected so as to impinge on an opposite surface of the coated strand.
Abstract: An electrical resistance heated window having at least three heatable zones and at least one of the heatable zones is generally centrally located on the window and can be heated faster to a higher temperature than the other of the zones for faster defogging and deicing of that particular zone.
Abstract: A wireless velocity detector for a bicycle includes a coil mounted on the wheel hub of the bicycle which generates a rotating magnetic field as the wheel rotates, a receiver mounted on the handlebars that includes a pair of coils that sense variations in the strength of the rotating field as the bicycle moves and generates signals in response to the field variations and a microprocessor which converts the signals into information related to the movement of the bicycle, e.g. speed and distance. A liquid crystal display is used to display the information to the cyclist.
Type:
Grant
Filed:
May 31, 1991
Date of Patent:
January 5, 1993
Assignee:
PPG Industries, Inc.
Inventors:
Paul I. Waterhouse, Jeffrey C. Brower, Stuart P. Williams
Abstract: Bushings and bushing assemblies for supplying molten vitreous material in the form of exudations to be attenuated into filaments include a heat resistant cushioning material is provided under at least a portion of the flange portion of the bushing to thereby accommodate any thermal expansion of the bushing with respect to the insulation castable refractory material used to cement the bushing in place. The end walls of the bushing are contoured to thereby uniformly distribute the operating stresses occurring in the area of the junction of the flange and the side walls and the end walls of the bushing when the bushing is heated.
Abstract: A laminated transparency with an electroconductive coating positioned within the laminate. An edge coating composition is applied about the periphery of the laminate to seal the edge of the coating and prevent coating degradation.
Type:
Grant
Filed:
April 3, 1989
Date of Patent:
June 16, 1992
Assignee:
PPG Industries, Inc.
Inventors:
Amy M. Roginski, Bruce A. Connelly, George H. Bowser
Abstract: Apparatus for handling a hot glass sheet during conveyance from a hot atmosphere to a cold atmosphere comprising a ring-like member having an upper surface engaging a glass sheet outline that consists essentially of a phenolic resin reinforced with fibers composed of an aromatic polyamid composition and a support ring attached to the ring-like member in facing relation to the ring-like member and sufficiently smaller in the dimensions than those of the ring-like member to permit the ring-like member to interpose between the support ring and a supported edge of a glass sheet so as to provide thermal insulation as well as shielding between the metal support rings and the edge of the glass sheet.
Type:
Grant
Filed:
October 1, 1990
Date of Patent:
June 2, 1992
Assignee:
PPG Industries, Inc.
Inventors:
George R. Claassen, Robert G. Frank, Rudolph A. Karlo, John J. Ewing
Abstract: An automatic interlayer trimming assembly is provided with an abrasive belt that contacts the edge of a windshield assembly after lamination to remove any interlayer that has extruded out from the windshield edge during lamination. The belt is supported and advanced by a plurality of rollers and the windshield edge is moved in the same direction as the advancement of the belt. In addition, the belt may oscillate in a direction perpendicular to the belt advancement to help remove the interlayer.
Abstract: The number of bent laminated glass windshields having bull's-eyes that adversely affect its optical properties is reduced by using amorphous precipitated silica particles such as is used as flatting agents for paints, as a parting material between a pair of glass sheets during bending. The particles form relatively soft agglomerates that are milled and classified to produce a narrow distribution of particle sizes as compared to the distribution found in untreated silica, such as diatomaceous earths previously used as a parting material.
Type:
Grant
Filed:
December 28, 1990
Date of Patent:
May 5, 1992
Assignee:
PPG Industries, Inc.
Inventors:
Randy R. Kadunce, Paul W. Bush, Pamela L. Martino
Abstract: Selected portions of a glass sheet are heated to elevated temperatures and offset, i.e. reformed, relative to the remaining portions of the glass sheet while maintaining the optical properties of the remaining portions of the glass sheet. The reformed area can be used as a structure to which guide brackets are other hardware can be secured or as an integral glass ledge to guide the up and down movement of the glass sheet within a vehicle door frame.
Type:
Grant
Filed:
December 15, 1989
Date of Patent:
March 3, 1992
Assignee:
PPG Industries, Inc.
Inventors:
James G. Anderson, Jack A. Bricker, Earl L. May
Abstract: A dual lead electrically heatable windshield is provided with an internal jumper arrangement that allows the bus bar having the dual lead to be powered by a single external connection to one of the dual leads. A jumper arrangement may also be used in combination with a crack detector for the dual lead heatable windshield.
Type:
Grant
Filed:
October 2, 1990
Date of Patent:
February 18, 1992
Assignee:
PPG Industries, Inc.
Inventors:
Bruce A. Bartrug, Harry S. Koontz, John A. Winter
Abstract: A longitudinally extending row of closely spaced elongated flexible springs extend over an elongated slot of a furnace to prevent heat loss. The springs are deflected in turn as an arm moves along the length of the slot and the springs return to their original state after the arm passes by. The arm holds a glass handling device which holds a glass sheet within the furnace. The arm moves along the length of the slot so as to transport the glass sheet through the sections of the heat treating furnace.
Abstract: A bushing balance controller controls the overall average temperature of a multiple segment glass fiber forming bushing and the temperature of each individual bushing segment. Current shunting loops divert current away from each bushing segment as required to provide the proper bushing segment temperature profile as well as the desired average bushing temperature.
Abstract: An electrochromic window includes a first transparent substrate, an electroconductive film electrode, a transparent electrochromic film in contact with said electroconductive film, an ion-conductive layer in contact with said electrochromic film, a counter electrode in contact with said ion-conductive layer, and a second transparent substrate overlaying the counter electrode. A plurality of bus bars extend across the electroconductive film electrode to distribute electrical current throughout the film electrode and provide a more uniform current density between the film electrode and the counter electrode.
Type:
Grant
Filed:
September 13, 1989
Date of Patent:
November 19, 1991
Assignee:
PPG Industries, Inc.
Inventors:
David E. Singleton, Kuo-Chuan Ho, Charles B. Greenberg
Abstract: An alignment device is provided with stop members that are rotatably supported on a block member in a manner such that said stop members contact the edge of the sheet along the axis about which the stop members rotate.
Abstract: This invention relates to a novel bushing apparatus having unique nozzles or projecting orifices for the production of round glass fibers. Particularly, it relates to a bushing having tips with cross-sections in the form of finite-sided polygons. It is shown that the use of noncircular tips to produce round fibers can result in higher tip packing densities, higher throughputs, and increased forming process stability than are now possible using the present state of the art. Tips with square cross-sections are shown to be the most preferred embodiment.