Of Wire, Rod, Tube Or Filament Patents (Class 156/158)
  • Patent number: 4648926
    Abstract: A coupler for electrically-isolating two conductive sections of fluid-passing line includes two nonconductively-interconnected pieces of tubing for insertion in the line. The pieces of tubing each have a divergently-flared end, and the flared ends are nonconductively-interconnected within two dielectric wafers. Each wafer has a tapered hole extending through it that matches the flared ends and enlarges to a face on the wafer. The flared ends are each bonded within a separate one of the tapered holes in a position recessed from the face with the flare of the end paralleling the taper of the hole, and the faces are bonded together with the larger ends of the tapered holes aligned and the flared ends sealed in fluid communication with an electrically-nonconductive gap between them.
    Type: Grant
    Filed: November 8, 1985
    Date of Patent: March 10, 1987
    Assignee: General Dynamics Pomona Division
    Inventors: Oakley G. Ross, Mark L. Kline, Larry D. Wedertz
  • Patent number: 4644741
    Abstract: A certain process and exemplary machinery for making yarn which is particularly useful for producing mops and mats utilizes yarn generally of a mixture of cotton and certain synthetic fibers and subjects the yarn to heat and pressure. The heat melts the surface of the synthetic fibers and pressure urges the cotton fibers into engagement with the synthetic fibers. Upon cooling, the cotton fibers are mechanically bonded to the synthetic fibers and provide a mop yarn which is fluid absorbant, durable and resistant to scrubbing abrasion and maintains integrity for repeated use and washings.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: February 24, 1987
    Assignee: Golden Star, Inc.
    Inventors: J. Gary Gradinger, Robert W. Quearry, Robert D. Chalfant, Charles G. Wilson
  • Patent number: 4640732
    Abstract: The apparatus increases the hydraulic pressure in rams 16 until one pipe moves towards a heater plate 14. The movement is detected by a limit switch 26 and a microprocessor-based control system 28 adds a pre-programmed value of pressure to that pressure which caused the movement (drag pressure). The total pressure is applied to force the pipe ends against a heater plate 14 to form end beads (bead-up). After heating for a pre-programmed period the control system automatically initiates plate retraction and forces the pipe ends together (fusion) for another programmed period. The applied pressure is the sum of the recorded drag pressure and a pre-programmed added pressure. Operator judgement of bead size, pressures and time periods is eliminated. Pressurised fluid is supplied to the rams 16 from a pump and accumulator combination. The sense of ram motion is determined by changeover valves controlled by the control system 28.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: February 3, 1987
    Assignee: British Gas Corporation
    Inventor: Trevor G. Stafford
  • Patent number: 4636272
    Abstract: The process for thermally bonding plastics is capable of bonding two tubings over a very small circumferential overlap area and the bond formed thereby, is able to withstand high peel and shear forces. The method includes the steps of: providing a stepped mandrel having a smaller diameter portion and a larger diameter portion; sliding a first tubing over the smaller portion; sliding a second tubing over the larger portion and slightly over the first tubing to establish an overlapping area to be bonded; sliding a shrink tubing over the second tubing to a position over the overlapping area; placing the overlapping area in a die; and heating the die a sufficient amount for a sufficient time to cause bonding of the first tubing to the second tubing. Preferably, the first tubing is made of a substantially non-crosslinked olefin and the second tubing is made of a highly crosslinked (heat shrink) polyolefin.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: January 13, 1987
    Assignee: Cordis Corporation
    Inventor: Gary T. Riggs
  • Patent number: 4630846
    Abstract: A pipe joint wherein an annular connecting resin body in contact and engagement with the outer periphery of one end of at least one pipe is used for connecting the end of the pipe to one end of another pipe. The joint comprises a device for reinforcing the bond between said one pipe and the connecting resin body in addition to sanding provided for the outer periphery of the end of said one pipe. The bond reinforcing device is a barbed wire, barbed tape, piano wire or the combination of engaging grooves and engaging projections, which prevents the axial displacement of said one pipe relative to the resin body to avoid cracking due to such displacement.
    Type: Grant
    Filed: April 7, 1983
    Date of Patent: December 23, 1986
    Assignee: Hitachi Zosen Corporation
    Inventors: Yoshinori Nishino, Masahiko Yamamoto, Tadayoshi Uda, Tomoyoshi Kanazawa
  • Patent number: 4610742
    Abstract: The tubular food casings and especially wet sausage casings are spliced together by means of splicing tape comprising cellulose backing coated with a saran polymer. The tape and joined casing sections are bonded by application of controlled heat and pressure to form machinable and stuffable splices with exceptionally high peel strengths when wet.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: September 9, 1986
    Assignee: Teepak, Inc.
    Inventors: Jaap Rop, Jacobus H. A. Verboekend
  • Patent number: 4600457
    Abstract: A method is provided for splicing carbonized PAN tows in which the tows to be spliced are cut square and coated at the ends thereof with a resin solution, following which the coated ends are joined together, heated so as to cure the resin solution and then pinched to compact the resulting splice. The resin solution is comprised of a mixture of a solid acrylic polymer, a liquid acrylic polymer, a solid epoxy resin and a solvent.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: July 15, 1986
    Assignee: Hitco
    Inventors: Raymond G. Spain, James E. Massie
  • Patent number: 4594121
    Abstract: An end portion of an elongate member of generally cylindrical form, such as an optical fiber, is placed in a predetermined position utilizing a substrate having a surface that is defined by a generatrix that is a straight line, e.g. a flat surface. A foil of flexible material is secured to the surface of the substrate and defines with the substrate a generally straight, elongate passageway that is parallel to the generatrix of the surface and has a first portion of substantially uniform cross-section adapted to receive an end of the elongate member in closely fitting relationship and also has a second portion that tapers towards the first portion. The end portion of the elongate member is inserted into the first portion of the passageway by way of the second portion thereof.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: June 10, 1986
    Assignee: Tektronix, Inc.
    Inventor: John H. Mitch
  • Patent number: 4586970
    Abstract: A method of forming a connection part for polyolefin insulated electrical wires or cables is disclosed which comprises a cross-linkable reinforcing insulation layer around said connection part, providing around said reinforcing insulation layer a heat shrinkable tube consisting of an integrated assembly of a semiconductive layer and a specific insulated portion consisting of at least two cylindrical heat shrinkable semiconductive members in combination with each other through an insulation material, and then heating said tube under pressure to effect crosslinking of said reinforcing insulation layer and cause said reinforcing layer to become integrated with said heat shrinkable tube. A heat shrinkable tube for use in this method is also described.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: May 6, 1986
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kojiro Ishise, Keiichi Kojima
  • Patent number: 4575372
    Abstract: An intraocular lens loop, with an eyelet formed on the loop, and a method of forming the eyelet employing ultrasound energy. There is also disclosed a special fixture for use in manufacturing the eyelet loop.
    Type: Grant
    Filed: June 22, 1983
    Date of Patent: March 11, 1986
    Assignee: Iolab Corporation
    Inventor: Ivan Gundersen
  • Patent number: 4565593
    Abstract: Inspection of a fusion splice between the ends of two optical fibres, said splice being reinforced by a support member, is facilitated. In particular, inspection of the joint between the optical fibre cores in a fusion splice is facilitated. The splice is held in a transparent support member by means of a transparent adhesive matched in refractive index to the cladding of the fibre. Apparatus is described which allows the splice to be viewed in two directions at right angles by means of a microscope whose position may be adjusted therefor without rotation relative to the support member. The arrangement is of particular relevance to splices between monomode fibres whose small core diameters call for a high degree of precision in jointing in order to avoid optical loss.
    Type: Grant
    Filed: October 5, 1983
    Date of Patent: January 21, 1986
    Assignee: British Telecommunications
    Inventor: Donald Marr
  • Patent number: 4548630
    Abstract: A method and apparatus for fusion splicing optical fibres, in which the first clamping arrangement comprising arms 3 and 4 and clamps 3a, 4a pivots over from a first position to a second position in which magnetic fibre clamps 14a, 14b hold the fibre ends in a two-part fibre V-location 8a, 8b to precisely coaxially align the fibre ends. Fusion electrodes 11, 12 fuse the ends together.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: October 22, 1985
    Assignee: ITT Industries, Inc.
    Inventor: Ryszard Biedka
  • Patent number: 4541883
    Abstract: The present invention provides a method for making a thermoplastic mandrel in which at least two sections of a thermoplastic rod, comprising a thermoplastic material which has been compounded with a finely divided metal or a metallic oxide filler, is subjected to a high voltage electrical induction field in a mold, causing fusion of the rod ends. Prior to the fusion, the ends of the thermoplastic rod are cut in a wedge shape, and in the preferred method, the wedge shaped ends meet at an angle of 90.degree. and are pressed together in the mold. The heat resulting from energizing the metal filler in said thermoplastic rods by induction, causes simultaneous melting of both thermoplastic rod ends and subsequent fusion of said rod ends. The thermoplastic mandrel made according to this method has a bond at the splicing point which is smooth, flash free, fused, solid and seamless, said mandrel being free of warping, shrinking and deformation.
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: September 17, 1985
    Assignee: Dayco Corporation
    Inventor: Charles M. Lewis
  • Patent number: 4522669
    Abstract: A mould portion and/or protective element of the type consisting of a material subjected to deformation is disclosed. A method and a device for manufacturing such a mould portion and/or protective element are also disclosed.The mould portion and/or protective element is preferably intended to be used as a mould portion in moulding an article and/or as a protective element to prevent access of soil and water to a surface portion of the article during transportation and storage thereof.Such materials subjected to dimensional changes as can be used as mould portions and/or protective elements present the advantages of being inexpensive and permitting removal of the article without difficulty. One such material is for example cellular plastics. The dimensional changes, however, have entailed so great difficulties in using mould portions and/or protective elements of such materials that they have made the use of the material impossible.
    Type: Grant
    Filed: September 1, 1982
    Date of Patent: June 11, 1985
    Assignee: Forsheda AB
    Inventors: Olof Nordin, Soren Forsberg
  • Patent number: 4518445
    Abstract: This invention relates to continuous manufacturing of insulated wire and conductor, and in particular to heating cables having "cold ends". A process is described by which predetermined lengths of resistance conductor (4) and of cold end conductor (9) are continuously and alternatively jointed together. After insulation and provision of additional protective sheats the continuous composite conductor is cut into cold end heating cables. A conductor jointing process is described.
    Type: Grant
    Filed: March 5, 1984
    Date of Patent: May 21, 1985
    Assignee: International Standard Electric Corporation
    Inventors: Jack R. Pedersen, Sigmund Ege
  • Patent number: 4517536
    Abstract: The air gap in the joints between millimeter wavelength, dielectric waveguide circuit components is filled with a slurry made from an inorganic dielectric, such as barium titanate; and an organic binder, such as cellulose nitrate. The proportions of the dielectric and binder are taken so as to have a composite dielectric constant the same as that of the components being joined. This removes breaks or discontinuities and in turn reduces the insertion loss at the joints.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: May 14, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Richard A. Stern, Richard W. Babbitt
  • Patent number: 4514244
    Abstract: A plastic pipe element comprises an inner one-piece liner of thermoplastic material. The liner is formed so as to include at least one cylindrical leg having a free outer end and inner end disposed intermediate opposite ends of the liner. At least one pipe section is formed comprising an inner thermoplastic lining and a fiber reinforced outer layer. That pipe section is bonded to an outer surface of the cylindrical leg such that an inner end edge of the pipe section overlies the liner. A sheet of fiber reinforced thermosetting resin molding compound is applied externally around the inner end edge of the pipe section and is subjected to pressure and heat to form the sheet into a desired shape. Thereafter, the sheet is allowed to harden. Elements formed in this manner include a T-fitting, a pipe flange, a 90.degree. fitting, a reducer fitting, a 45.degree. fitting, and a pipe cap.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: April 30, 1985
    Assignee: Nibco Inc.
    Inventors: Robert R. Shaefer, Kenneth J. Matthews
  • Patent number: 4514243
    Abstract: A tire for a wheelchair wheel or the like in the form of a composite extrusion comprising a relatively soft, elastomeric casing extruded over a semirigid core. End faces of a length of extruded stock are joined by thermal fusion developed by a ferromagnetic element inserted in the tire and exposed to high frequency electromagnetic radiation.
    Type: Grant
    Filed: July 9, 1982
    Date of Patent: April 30, 1985
    Assignee: Dan T. Moore Co.
    Inventors: Dan T. Moore, III, Michael F. Fischer
  • Patent number: 4502214
    Abstract: A method of making a wire reference electrode in an electrolytic cell is provided wherein the wire reference electrode comprises a lead-in wire portion, a reference wire portion, a sealing material to seal the junction of the lead-in and wire reference portions, and a heat shrinkable insulating material which is heated for a predetermined period of time to collapse the heat shrinkable insulating material about the sealing material.
    Type: Grant
    Filed: April 29, 1982
    Date of Patent: March 5, 1985
    Assignee: Olin Corporation
    Inventors: Ronald C. Miles, George W. Geren, R. W. Peel
  • Patent number: 4499216
    Abstract: A method is provided for splicing carbonized PAN tows in which the tows to be spliced are cut square and coated at the ends thereof with a resin solution, following which the coated ends are joined together, heated so as to cure the resin solution and then pinched to compact the resulting splice. The resin solution is comprised of a mixture of a solid acrylic polymer, a liquid acrylic polymer, a solid epoxy resin and a solvent.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: February 12, 1985
    Assignee: Hitco
    Inventors: Raymond G. Spain, James E. Massie
  • Patent number: 4487475
    Abstract: The disclosed invention provides a lightguide and a process for connecting optical fibers to produce it by which there is obtained a lightguide having a small light loss at the point of connection and which permits easy removal of excess (leaked out) adhesive at the point of adhesion. In the connecting process, at the time of connecting the optical fibers together, only the adhesive held between the end surfaces of plural optical fibers is cured without curing the excess part of the adhesive protruding out of the end surfaces of the optical fibers so that the excess part of the adhesive can easily be removed with an organic solvent or the like.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: December 11, 1984
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kazufumi Ogawa
  • Patent number: 4484975
    Abstract: A hand held apparatus for joining coaxially two lengths of small diameter plastic pipe comprises two parts. One part forms a first handle, and is attached to a horizontal frame at right angles. The frame holds at one end a stationary clamp into which one end of a first pipe can be inserted and locked in position. The other end holds a movable clamp which is a cylindrical tubular device into which the second pipe is positioned and clamped. The tube of the second clamp slides axially in a cylindrical portion attached to the second end of the frame at the point of junction of the handle and the frame. A second handle comprises an arm with a U-shaped portion. One end of the second handle is pivoted at a selected point on the frame so that the second handle can rotate about the pivot which is perpendicular to the plane of the first handle and frame. The rotatable handle is adapted to reciprocate the movable clamp so as to bring the facing end of the second pipe towards the facing end of the first pipe.
    Type: Grant
    Filed: January 23, 1984
    Date of Patent: November 27, 1984
    Assignee: McElroy Manufacturing, Inc.
    Inventor: Arthur H. McElroy
  • Patent number: 4441947
    Abstract: A patterned, nonwoven, articulated fabric exhibiting a substantially uniform texture and comprised of a multiplicity of synthetic fiber elements, the opposing free ends of each of said synthetic fiber elements being joined to one another to form substantially continuous loops, said loops being interconnected to one another in a predetermined pattern. Method for producing said nonwoven fabric using specially prepared fiber elements which curl in a predetermined configuration in response to an external stimulus is also disclosed.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: April 10, 1984
    Assignee: The Procter & Gamble Company
    Inventor: Edward F. Leonard
  • Patent number: 4439255
    Abstract: A heat-resistant insulated electric wire and cable which comprises an electric conduction; the first coating layer thereon consists of a mixture of a binder and a finely ground and unmelted inorganic substance; and the second organic insulating coating layer formed on the first coating layer. Said heat-resistant insulated electric wire can advantageously be used for a coil of a magnet or a motor.
    Type: Grant
    Filed: March 9, 1982
    Date of Patent: March 27, 1984
    Assignee: Nippondenso Co., Ltd.
    Inventors: Takeshi Imai, Naohiro Kako
  • Patent number: 4439221
    Abstract: An apparatus and method are described for making an optical fiber coupler. A pair of optical fibers are supported in predetermined orientation by positioning means. The latter are spaced apart along a common axis. The optical fibers are positioned within tube means of a selected size intermediate the positioning means. In use, the tube means functions as a furnace to distribute heat uniformly to at least a portion of the fibers to fuse the same together. One of the positioning means preferable is rotatable, to enable twisting of the fibers. It is also preferable that at least one fiber has a tensile force applied to it. More preferably, the tensile force is sufficient to cause necking of the heated fiber, thereby forming a biconical section therein. Rotation of one positioning means through about one half revolution normally causes twisting of the biconical section and fusion thereof to the other fiber. Typically, both fibers are subject to a pulling force to create biconical sections.
    Type: Grant
    Filed: January 14, 1983
    Date of Patent: March 27, 1984
    Assignee: Her Majesty the Queen in right of Canada as represented by the Minister of National Defence
    Inventors: Lawrence C. Smyth, Alexander W. Lightstone
  • Patent number: 4436567
    Abstract: A method and apparatus for joining webs of aseptic pouches such that the internal asepsis of the pouches is preserved includes bringing the ends of the webs to be joined into overlapping relationship to form an overlapping area, applying a double-sided microbicidal adhesive tape between the overlapping ends so that the ends are held in overlapping relationship, applying heat to the overlapping area sufficient to form a peel seal between the opposing walls of the webs in the overlapping area, making a transverse fusion-like incision within the peel seal in the overlapping area, applying a microbicidal adhesive tape to outside surfaces of the webs in the overlapping area to microbicidally seal the fusion-like incision, and separating the walls of the webs thereby forming a continuous and sterile passageway between the pouches through the incision.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: March 13, 1984
    Inventor: Roy J. Weikert
  • Patent number: 4433896
    Abstract: Fiber optic coupler for coupling two mutually isolated optical fibers to a third union fiber rapidly and easily. Two mechanical elements are used, the first one being a hollow cylinder with an inside diameter equal to twice the fiber outside diameter, and the second being a second hollow cylinder with an inside diameter equal to one fiber diameter and an outside diameter equal to twice the fiber diameter. The union fiber is inserted into the smaller cylinder, the two mutually isolated fibers are inserted into the larger cylinder, the empty space in the larger cylinder is filled with an index-matching cement, and the two cylinders are then pushed together. This provides a simple and economical assembly of a coupler which will work for plastic fibers, and does not require any expensive manufacturing steps. Preferably stainless steel is used for the two cylinders.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: February 28, 1984
    Assignee: Texas Instruments Incorporated
    Inventor: Gary A. Frazier
  • Patent number: 4428992
    Abstract: Reinforcement fiber for fiber-reinforced resin composites such as graphite tows are spliced by applying a solution of a linear, soluble, high glass transition temperature polyimide having good thermal-oxidative stability to the broken ends of a fiber, placing the ends in contact and removing solvent. The preferred polyimide is an aromatic-cycloaliphatic diamine such as 5,(6)-amino-1-(4' amino phenyl)-1,3-trimethylindane (DAPI) imidized with a dianhydride such as PMDA or BTDA. The soluble polyimide can be preapplied to the fiber as a sizing. The splices are not apparent by visual inspection nor by instrumental scanning of cured composites indicating there is no blistering nor loss of strength.
    Type: Grant
    Filed: November 21, 1981
    Date of Patent: January 31, 1984
    Assignee: Hitco
    Inventor: Sidney W. Street
  • Patent number: 4423923
    Abstract: Coupler for joining two optical fibers to a third fiber, while preserving good optical isolation between the first two fibers. The coupler is preferably formed of an approximately index-matching plastic, and the fiber ends are cemented in place. The two fibers which are to be isolted are located parallel and adjacent to each other, and their ends are glued into an elongated hole on one side of the coupler. Opposite to this hole is a second hole into which the union fiber is seated. Epoxy glue is used to connect the fibers in place. Plastic fibers are preferably used.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: January 3, 1984
    Assignee: Texas Instruments Incorporated
    Inventors: Gary A. Frazier, Milo R. Johnson
  • Patent number: 4412878
    Abstract: A method of joining together optical fibre undersea cables. In a first step, a given length of a carrier vault (1, 2) which surrounds the optical-fibre containing core (3, 4) of the cable end is cut off so as to clear a sufficient length of optical fibre (5, 6), a part (9, 10) with at least one opening (11, 12) in which said optical fibre (5, 6) is inserted is placed in each said cable ends between the strands of the carrier vault, the ends of said carrier vaults (1, 2) are brought together and fixed substantially in contact each with another, said optical fibre ends (5, 6) of each of said cables are connected together then the excess length of fibre thus formed is stretched and helically wound around a sleeve (14).
    Type: Grant
    Filed: April 6, 1982
    Date of Patent: November 1, 1983
    Assignee: Societe Anonyme dite: Les Cables de Lyon
    Inventor: Lucien Guazzo
  • Patent number: 4402777
    Abstract: There is presented various methods and articles utilizing heat shrinkable and heat sealable sheets, films and materials.
    Type: Grant
    Filed: July 28, 1981
    Date of Patent: September 6, 1983
    Assignee: Radiation Dynamics, Inc.
    Inventor: Rodney L. Derbyshire
  • Patent number: 4398795
    Abstract: A low-loss fiber optic tap is fabricated by mounting a portion of an optical fiber with epoxy resin along the curved surface of a solid support form. After curing of the epoxy, a planar surface extending partially into and along the fiber is established by lapping and polishing the device to a carefully controlled depth. A prism having a preferred characteristic angle of 70.degree. is attached to the planar surface along the optical fiber and a photodiode is mounted adjacent thereto. The disclosure teaches how the parameters of the device may be tailored to the specific signal tap requirements of particular fiber optic transmission lines.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: August 16, 1983
    Assignee: General Dynamics, Pomona Division
    Inventor: John P. Palmer
  • Patent number: 4376231
    Abstract: An improved, solvent-resistant sealing compound is described. It is an acrylic rubber composition adapted particularly for sealing splice case closures around telecommunications cable.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: March 8, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Raffaele A. Sabia, James L. Williams
  • Patent number: 4364788
    Abstract: A transition device (10) is provided to facilitate the forming of a lightguide ribbon cable unit (22) from a plurality of individual insulated light conductors (24). The light conductors (24), which each include a light-conductive glass fiber (12) surrounded by an inner layer (14) of insulation and an outer layer (16) of insulation, are mounted into converging channels (44) of the transition device (10), such that portions of the glass fibers which have been stripped of insulation extend from an exit end (50) of the device arranged in a parallel side-by-side array between two strips of pressure-sensitive adhesive tapes (18 and 20) to form the ribbon cable unit (22). The assembled transition device (10), ribbon cable unit (22) and light conductors (24) produce an optical fiber assembly (93).
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: December 21, 1982
    Assignee: Western Electric Company, Inc.
    Inventors: Lonnie B. Bloodworth, Jr., Christian Scholly, Thomas L. Williford, Jr.
  • Patent number: 4364380
    Abstract: A device is disclosed for fitting a fracture wire around a tooth as part of an interdental arch wiring technique. In a preferred embodiment of the invention, the wire is U-shaped and the ends of a loop of dental floss are secured to respectively opposite end portions of the wire. Portions of the dental floss loop adjacent the ends of the wire are inserted downwardly into the respective interdental spaces on opposite sides of the tooth in question and the dental floss is then used to lead the wire into those spaces and to a position in which the bight of the wire embraces the tooth.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: December 21, 1982
    Inventor: Michael Lewis
  • Patent number: 4363687
    Abstract: A completely self-contained apparatus and associated technique for the manufacture of large fiberglass structures. In a preferred embodiment, the system is designed to manufacture large fiberglass storage tanks for liquids, and is self-contained from the point of view that the machine is capable of performing all manufacturing steps without any auxiliary equipment and may be set up virtually anywhere that can provide a source of electricity and air. The main components of the machine include an operator's carriage which is cantilevered from a rear frame so as to enable same to be inserted into the open end of a large, substantially cylindrical revolving mold having a closed, substantially hemispherical end portion. The carriage includes an overhead canopy for the protection of the operator, as well as fresh air intake and exhaust fans to provide adequate ventilation for the operator.
    Type: Grant
    Filed: April 10, 1981
    Date of Patent: December 14, 1982
    Inventor: Stephen W. Anderson
  • Patent number: 4360248
    Abstract: A multiport optical cable or bus, composed of bundles of parallel fibers interconnected by an optical star structure, has a higher packing fraction and greater efficiency in the mixing and redistribution functions because the star's radiating arms have their individual cladding layers omitted or removed and because they are fused together to form the mixer section or a part of it. Where the numbers of input and output ports and arms are unequal, the unclad arms have their fused portions optically spliced or connected to form a composite mixer section. Several sections may be cascaded, using the same structural principles, to provide additional lower-level optical outputs for control or other purposes. The cladding function for the star structure is provided by separately encasing the radiating arms and mixer section or sections in a light-reflecting material. Preferably, this is a plastic potting compound having an optical index of refraction lower than those of the star arms or mixer portions.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: November 23, 1982
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Gary W. Bickel, David L. Baldwin
  • Patent number: 4352708
    Abstract: A portable wheeled apparatus for fusing plastic pipe having a support frame with stationary clamps attached thereto and movable clamps in axial alignment therewith. A first pipe section is secured within the stationary clamps and a second pipe section is secured within the movable clamps and are brought into contact for facing, heating and fusing by a manually operated handle. The apparatus is provided with retention devices to maintain a given axial force applied to the pipe sections during fusing. An indicator device is in communication with the movable clamps to display the force applied to the pipes.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: October 5, 1982
    Inventor: Arthur H. McElroy
  • Patent number: 4319951
    Abstract: Conventional communication cables must be spliced and so must fiber optic cables. Special care must be taken at splice points or locations so as not to cause faults in the optical fibers and still have an organized packaging and splicing arrangement. Optical fibers, unlike copper wire conductors, have memory. This causes a problem, for example, since one can splice a copper pair, coil it up or place it in a splice case, and it will stay. If the same thing is done on an optical fiber, it will not stay as placed and in fact will recoil like a spring. This invention comprises a fiber organizer, made up of a series of channels, and it can accommodate and secure individual spliced fibers from each length of the optical cables. Also the organizer provides a fiber splice support section in which the splices are placed upon completion.
    Type: Grant
    Filed: April 29, 1980
    Date of Patent: March 16, 1982
    Assignee: GK Technologies, Incorporated
    Inventors: Kenneth N. Korbelak, Joseph B. Masterson
  • Patent number: 4303458
    Abstract: Conduits (3a, 3b, 3c) are joined with a one-piece tubular connecting piece (1) by inserting support members (5a, 5b, 5c) through a sealable opening (6) in the connecting piece to support the conduit ends while said ends are secured to the connecting piece to communicate with openings (4a, 4b, 4c) in the connecting piece. After securing the conduit ends to the connecting piece, the support members are withdrawn through the sealable opening and that opening is then sealed. The support members can also act as electrodes for welding the conduit ends to the connecting piece, especially when the conduit ends and connecting piece are formed of thermoplastics. The method has particular, but not exclusive, application to smoothly connecting tubes for conveying blood.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: December 1, 1981
    Assignee: Gambro AB
    Inventor: Kaj O. Stenberg
  • Patent number: 4302267
    Abstract: Apparatus and method for aligning a pair of optical fibers wherein a first fiber is positioned in a holder, adjusted along two axes in a plane, and rotated about an axis perpendicular to the plane. A second fiber is mounted in a universal fixture by a first set of adjustable positioning screws opposed to each other in a housing, and a second set of adjustable positioning screws opposed to the first set positioning the housing on an adjustable structure. The optical fibers are brought into position and flush contact effected by the flexibility of the universal fixture. Thereafter the structure is adjusted in a plane defined by two separate axes to effect alignment about the axes, and rotated about the third axis to complete alignment. A laser or other light source and a light sensitive element are utilized to determine when maximum light transmission is achieved, thus signifying proper alignment.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: November 24, 1981
    Assignee: General Dynamics, Pomona Division
    Inventors: John P. Palmer, Phillip B. Ward, Jr.
  • Patent number: 4292099
    Abstract: The present invention relates to a device and method for environmentally sealing a wire splice for use in nuclear power stations and the like. More particularly the device includes three components, an end cap, a sleeve and a separator. The end cap is cross-linked and heat shrinkable. The sleeve and separator fuses under the temperature required for shrinking the end cap. Upon fusing, the sleeve and separator mixes into an impermeable unitary mass in which are embedded the wires.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: September 29, 1981
    Assignee: AMP Incorporated
    Inventor: Leon J. Dinger
  • Patent number: 4288266
    Abstract: In a method for heated tool butt welding of pipe consisting of a thermoplastic material by placing or pressing the surfaces to be joined of the pipes to be welded into contact with a heated tool to form an inner weld bead at each end to be joined, subsequently heating the surfaces at a reduced contact pressure to the welding temperature and fitting the surfaces together under pressure after having removed the heated tool, the improvement for minimizing the formation of a protrusion within the resultant pipes which comprises pressing an elastic insert against the inner weld bead while joining said surfaces of said pipe together.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: September 8, 1981
    Assignee: Ruhrchemie Aktiengesellschaft
    Inventors: Klaus-Dieter Konrad, Rudolf Kellersohn, Hans Steck, Josef Schaub
  • Patent number: 4288143
    Abstract: For the splicing of trunks of optical fibers, confronting trunk ends are closely juxtaposed in a surrounding enclosure which is subjected to vibrations transverse to its axis to generate an oscillating air column setting the trunk ends in vibration, the fiber trunks being clamped at points spaced from these ends by a distance sufficient to give rise to several standing-wave nodes at the applied frequency on the free fiber extremities. With these extremities vibrating in unison but at limited amplitudes compatible with the maximum permissible offset of the trunk axes, the confronting trunk ends are joined by the hardening of a blob of cement matching their refractive index, by electric fusion, or with the aid of a laser beam.
    Type: Grant
    Filed: December 27, 1979
    Date of Patent: September 8, 1981
    Assignee: CSELT - Centro Studi e Laboratori Telecomunicazioni S.p.A.
    Inventor: Pietro Di Vita
  • Patent number: 4276113
    Abstract: Optical fibers are held and aligned by means of a base member and a cover. The base member has a longitudinal recessed V-shaped groove along a fiber engaging face thereof, and a plurality of rectangular transverse slots spaced along the groove. The slots extend to a depth extending the groove. The cover has a longitudinal extended V-shaped protuberance along a face of the cover which engages the base member. The protuberance corresponds in size and shape to the recessed V-shaped groove, but is blunt at its apex. A plurality of rectangular transverse inverted V-shaped fingers are spaced along the protuberance, and are blunt at their apices. The fingers have a length not exceeding the depth of the slots.A system for splicing two optical fibers in alignment with each other utilizes three of the foregoing clamps, two to hold the fibers temporarily in place and one as the splice part itself. Optical adhesive is used for affixing the ends of the fibers and the splice clamp to each other.
    Type: Grant
    Filed: October 4, 1979
    Date of Patent: June 30, 1981
    Assignee: GTE Laboratories Incorporated
    Inventors: W. John Carlsen, Mark L. Dakss, Gary M. Lambert
  • Patent number: 4266997
    Abstract: The coupling of two tubular elements is achieved by welding them together by energization of an electrical resistance element, the one element comprising a male end, the other a socket end. The coupling operation is carried out by means of a composite connecting piece comprising two rings which are fitted on one another, one acting as a support for a bifilar electrical resistance element and the other as a sheath. The electrical resistance element is thus uniformly coated in plastic material and is accurately centered, thereby ensuring uniform heating and welding. This coupling method is for use in coupling discharge pipelines for waste water and rain water and for conduits for industrial fluids.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: May 12, 1981
    Assignee: Pont-A-Mousson S.A.
    Inventor: Noel Lippera
  • Patent number: 4263084
    Abstract: A machine for welding thermoplastic components which has a pair of clamps for holding two thermoplastic parts to be welded, one mounted on a slide, and action piston for moving the slidably mounted clamp towards the other clamp so as to press thermoplastic components held in the clamps against each other for welding, the action piston being located eccentrically of the clamps and a second, reaction piston located in dimension so as to provide a reaction force couple which nullifies the force couple arising from the eccentricity of the main action piston. This is the advantage that the force couple is not applied to the clamp which is slidably mounted and to components associated with the slide and provides assurance of an evenly distributed pressure between the two thermoplastic components to be welded therefore assuring better quality welds.
    Type: Grant
    Filed: June 18, 1980
    Date of Patent: April 21, 1981
    Assignee: Impala Plastics (Pty) Limited
    Inventor: Seppo I. Takala
  • Patent number: 4256412
    Abstract: In an axially extending rod-shaped connection element a plastics material rt having at least one layer of unidirectional fibers is connected to a transition element in an overlapping arrangement. Each of the plastic material part and transition element has an axially extending tapered surface joined by an adhesive layer over the axial length of the overlapping connection. The angle of the tapered surfaces is in the range of 2.degree. to 5.degree. relative to the axial direction of the connecting element.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: March 17, 1981
    Assignee: Messerschmitt-Bolkow-Blohm Gesellschaft mit beschrankter Haftung
    Inventors: Gerd Tybus, Hilmar Laube
  • Patent number: 4248499
    Abstract: A device for connecting individual light waveguides or conductors together using a splicing element which has a center portion for receiving and guiding the waveguides and end portions for engaging and gripping the sheath of the waveguides characterized by a pair of holders for holding light waveguides extending at an acute angle to a base of a splicing element which is held in a splicing element holder. The splicing element is movable relative to the ends of the fibers so that the ends of the individual light waveguides are moved towards one another in a centering groove of the center portion of the splicing element and are brought into mutual contact. Each of the holding devices for the light waveguides are mounted to move around a pivot, which lies beneath the plane of the waveguides when moved to a horizontal position and that each of the holders has a clamp for the portion of the light waveguide which is free of the sheath and for the sheath of the light waveguide.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: February 3, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventors: Heinrich Liertz, Dieter Kunze, Richard Parstorfer
  • Patent number: 4242385
    Abstract: There is disclosed a method of making an endless band, or a plurality of separably connected endless bands, from flexible weldable material especially plastics material. The method involves, basically, joining together two superimposed like strips of such material by welding together each pair of corresponding ends. Large quantities of such bands, separably connected together, can be continuously produced by feeding two batches of strip material forward in superimposed relationship, welding them together at intervals, and forming a tear-seal connection at the weld. Endless bands so formed are disclosed.
    Type: Grant
    Filed: October 7, 1977
    Date of Patent: December 30, 1980
    Assignee: TI Raleigh Industries Limited
    Inventors: Keith F. Hutcheon, Laurence A. Cordingley