Abstract:
There is disclosed a process for producing continuous, multicolored glass objects, such as stained glass windows without leading, which includes blowing a glass object, maintaining at least one colored pattern piece in contact with the surface of the object until the pattern piece becomes soft enough to be blown and then blowing the object to a final form whereby the pattern piece becomes incorporated in the glass object. Sheet material may be produced by blowing a cylinder, splitting the cylinder and flattening the cylindrical wall.
Abstract:
A crucible of pure transparent silica glass or pure translucent or opaque silica glass for the production of monocrystals used in making semiconductor elements which includes a hollow cylindrical part and a welded-on head. The head end of the hollow cylindrical part is formed from a tube with a head margin portion constricted towards the tube axis which is formed by shaping one end of the tube. A plate is welded into the aperture formed by the constricted head margin portion and has an area equal to at least one-tenth and at most four-fifths of the total head area made up by the head margin portion and the head.
Abstract:
A process for heat-bonding optical fibers comprising aligning a number of optical fibers in a mould with at least one of whose end surfaces is open and with end members slidable towards the inside of the mould from positions at which the end surfaces are open whereby a gas present among the optical fibers can be discharged, heating the optical fibers and evacuating the gas in the mould, closing the open end surfaces and applying pressure to the optical fibers through a press member and the end members, thereby heat-bonding the optical fibers; and an apparatus for heat-bonding optical fibers, comprising a mould with at least one of whose end surfaces is open, and including a press member as a wall of the mould, at least one end member provided for the end surfaces of the mould, and being capable of sliding inwardly along inclined surfaces of the press member upon application of a presssure on the press member.
Abstract:
A method and apparatus are described for permanently splicing glass optical fibers. The fibers are aligned colinearly, and their ends are brought into contact. Electric and magnetic fields are generated in the vicinity of the fiber end portions. The electric field creates an arc which moves along the fiber junction under the influence of the magnetic field, thereby ensuring complete fusing of the fiber endfaces.
Abstract:
1. THE METHOD OF MAKING AN EXTRUSION DIE FOR EXTRUSION FORMING OF A MATERIAL INTO A CELLULAR MEMBER OR BODY TO BE SUBSEQUENTLY USED AS A CORE MEMBER FOR A CATALYTIC CONVERTER OR THE LIKE, SUCH METHOD COMPRISING; (A) PROVING A MULTIPLICITY OF RELATIVELY THIN PLATES OR DISKS OF A SELECTED SIZE AND OF A GLASSY MATERIAL, EACH SUCH PLATE HAVING PLANAR OPPOSITE SURFACES; (B) SELECTIVELY ECHING ALMOST THROUGH ONE OF SAID PLATES IN THE DIRECTION NORMAL TO SAID PLANAR SURFACES THEREOF AND FROM ONE OF SUCH SURFACES TOWARDS THE OTHER WHILE LEAVING ADJACENT TO AND BENEATH SUCH OTHER PLANAR SURFACE A CONTINUOUS SUBSTANTIALLY THIN AND PLANAR SUPPORT LAYER OF THE PLATE MATERIAL AND THEREBY PROVIDING, IN SUCH PLATE AND EXTENDING IN PLANES PARALLEL WITH SAID PLANAR SURFACES, A RELATIVELY NARROW CURVED CHANNEL PREFERABLY CONCENTRIC AND PARALLEL WITH THE OUTER PERIMETER OF THE PLATE AND SPACED THEREFROM A SELECTED DISTANCE AND A REPETITIVE PATTER OF RELATIVELY NARROW AND SHORT STRAIGHT-LINE INTERCONNECTING AND NON-LINEARLY CONTINUOUS OR COEXTENSIVE CHANNELS, SOME OF WHICH CONNECT WITH SAID CURVED CHANNEL AND GROUPS OF SIX OF WHICH CHANNELS INTERSECT EACH OTHER AT SUBSTANTIALLY EQUAL ANGLES ON THE ORDER OF ABOUT SIXTY DEGREES AND PROVIDE A COMMON CENTER AXIS OF INTERSECTION OF THE CENTER LINES OF THE SIX CHANNELS OF EACH SAID GROUP OF SIX CHANNELS WITH EACH SUCH CENTER AXIS BEING SPACED SUBSTANTIALLY THE SAME DISTANCE FROM THE CORRESPONDING CENTER AXIS OF EACH OF THE SIMILAR ADJOINING GROUPS OF SIX CHANNELS, THE WALLS OF SAID PATTERN OF CHANNELS BEING DEFINED BY THE SIDEWALLS OF A MULTITUDE OF CLOSELY AND CORRESPONDINGLY SPACED-APART COLUMNS HAVING, WHERE POSSIBLE, CORRESPONDING PLANAR CROSS-SECTIONAL GEOMETRIC CONFIGURATIONS GENERALLY THOSE OF RHOMBUSES WITH ACUTE OBLIQUE ANGLES ON THE ORDER OF ABOUT SIXTY DEGREES; (C) SELECTIVELY ETCHING COMPLETELY THROUGH EACH OF A SUCCESSION OF SAID MULTIPLICITY OF PLATES AND IN THE DIRECTION NORMAL TO SAID PLANAR SURFACES THEREOF A MULTIPLICITY OF RADIATE PASSAGES HAVING PLANAR GEOMETRICALLY SIMILAR RADIATE CONFIGURATIONS SEPARATED FROM EACH OTHER AND EACH HAVING HAVING SIX RADICALS WITH THE CENTER AXES OF SUCH PASSAGES IN EACH OF SUCH SUCCESSION OF PLATES BEING EQUALLY SPACED FROM THE CENTER AXES OF EACH OF LTHE ADJOINING PASSAGES IN SUCH PLATE A DISTANCE CORRESPONDING TO THE DISTANCE BETWEEN SAID CENTER AXES OF SAID ADJOINING GROUPS OF SIX CHANNELS IN SAID ONE ETCHED PLATE, AND WITH SAID RADIATE PASSAGES IN EACH SUCCEDING ONE OF SAID SUCCESSION OF PLATES BEING GEOMETRICALLY SIMILAR TO SUCH PASSAGES IN ANY IMMEDIATELY PRECEDING ONE OF SUCH SUCCESSION OF PLATES BUT HAVING SMALLER DIMENSIONS IN THE DIRECTION OF THE PLANES OF SAID PLANAR SURFACES OF THE PLATES; (D) SELECTIVELY ETCHING COMPLETELY THROUGH A PLURALITY OF REMAINING ONES OF SAID MULTIPLICITY OF PLATES AND IN THE DIRECTION NORMAL TO SAID PLANAR SURFACES THEREOF A MULTIPLICITY OF CIRCULAR PASSAGES EACH HAVING A DIAMETER SUBSTANTIALLY CORRESPONDING TO THE DISTANCE BETWEEN THE ENDS A PAIR OF OPPOSITE ONES OF THE RADICALS OF THE LARGEST ONES OF SAID RAIDATE PASSAGES ETCHED THROUGH SAID SUCCESSION OF PLATES AND WITH THE CENTER AXES OF THE CIRCULAR PASSAGES THROUGH EACH OF SUCH PLURALITY OF PLATES EQUALLY SPACED FROM THE CENTER AXIS OF EACH OF THE ADJOINING PASSAGES IN SUCH PLATE A DISTANCE CORRESPONDING TO THE DISTANCE BETWEEN SAID CENTER AXES OF SAID ADJOINING RADIATE PASSAGES ETCHED IN SAID SUCCESSION OF PLATES; (E) MAKING A STACK OF SAID ETCHED PLATES WITH THE PLANAR SURFACES THEREOF ABUTTING AND WITH SAID CENTER AXES OF THE PASSAGES AND CHANNELS ETCHED THEREIN GENERALLY ACIALLY ALIGNED WITH EACH OTHER, SUCH STACK COMPRISING: (I) SAID SUCCESSION OF PLATES IN ITS SUCCESSIVE ORDER WITH THE PLATE HAVING THE LARGEST DIMENSIONAL PASSAGES THERETHROUGH AT A FIRST END OF SUCH SUCCESSION AND THE PLATE HAVING THE SMALLEST DIMENSIONAL PASSAGES THERETHROUGH AT THE SECOND END OF THE SUCCESSION; (II) SAID PLURALITY OF PLATES WITH THE PLANAR SURFACE OF ONE OF THE END PLATES OF SUCH PLURALITY REMAINING EXPOSED AND THE PLANAR SURFACE OF THE OTHER END PLATE OF SUCH PLURALITY ABUTTING AGAINST THE PLANAR SURFACE OF SAID PLATE AT SAID FIRST END OF SAID SUCCESSION OF PLATES, AND (III) SAID ONE PLATE WITH SAID ONE ETCHED PLANAR SURFACE THEREOF ABUTTING AGAINST THE PLANAR SURFACE OF SAID PLATE AT THE SECOND END OF SAID SUCCESSION OF PLATES AND SAID OTHER PLANAR SURFACE OF SUCH ONE PLATE REMAINING EXPOSED; (F) HEATING SAID STACK OF PLATES TO FUSE ALL OF THE PLATES OF SUCH STACK INTO A HOMOGENEOUS UNITARY BODY AND THEN PERMITTING SUCH BODY TO COOL; AND (G) GRINDING OR ABRAIDING SAID OTHER PLANAR SURFACE OF SAID ONE PLATE AND THROUGH SAID CONTINUOUS PLANAR SUPPORT LAYER ADJACENT TO AND BENEATH SUCH OTHER PLANAR SURFACE TO REMOVE SUCH LAYER AND EXPOSE SAID ETCHED CHANNELS PROVIDED IN SUCH ONE PLATE AND THEREBY COMPLETE THE MAKING OF SAID EXTRUSION DIE.
Abstract:
A method of forming an article such as a light focusing fiber waveguide by applying to a substantially cylindrical starting member a layer of soot having a radially varying composition by means of flame hydrolysis. The starting member is removed and the resulting substantially cylindrical hollow cylinder is heated and drawn to reduce the cross-sectional area and to collapse the hole to form a fiber having a solid cross-sectional area with a radially varying composition.
Abstract:
A frit capacitor of either the discrete or integrated microcircuit variety having a ferroelectric glass-ceramic dielectric whose dielectric constant is of intermediate value between about 20 and 400. The desired value of dielectric constant is accurately obtained in a readily reproducible manner by mixing a batch containing appropriate quantities of stable non-crystallizable glass particles and glass particles capable of forming a ferroelectric crystal phase. The desired dielectric constant is obtained by subjecting the batch to heat treatment. By controlling the weight ratio of the two glass components during the batch preparation, individual capacitor dielectrics having different dielectric constants can be provided utilizing the same firing schedule for each.
Abstract:
In accordance with the invention a high temperature resistant optical element having transparency in the visible and infrared wave length regions of the electromagnetic spectrum is manufactured by heating to a temperature of from about 800* C to 1,250* C, in a vacuum, a composition containing substantially equal molar amounts of magnesium oxide and aluminum oxide, the composition having a sub-micron particle size and having uniformly mixed therewith from about 0.2 to 4 percent by weight powdered lithium fluoride, and then applying a pressure of at least about 8000 psi to the composition for from about 1/2 to 3 hours after the temperature of the composition has been raised to about from 1300* C to 1600* C.
Abstract:
A side of a polygonal cross-sectioned glass laser rod core may be clad by applying a slab of a suitable cladding glass material thereto. The fusing of the slab to the core without the formation of entrapped gas bubbles therebetween is accomplished by allowing the slab to rest in essentially line contact with the side of the core at the end adjacent a suitable drawing furnace. The other end of the slab is spaced away from the core material. Means is provided for urging the slab of cladding material toward the side of the encore such that as the core and cladding material are drawn within the drawing furnace, the line of contact between the core and cladding gradually traverses the length of the core and cladding thereby forcing any gas out of the space which exists between the core and cladding to provide a bubble-free interface in the resulting clad glass laser rod.
Abstract:
A method of manufacturing a perforated plate comprising placing a plurality of tubes in the holes of at least one perforated base plate, and filling the space between the tubes with a material having a lower softening temperature than that of the tubes. This formed block is then cut in a direction transverse to the tubes to form thinner perforated plates.