Abstract: A substantially planar insulating sheet of high temperature printed circuit board material (11) is used to form a leadframe strip (18, 19, 21) for a semiconductor package (20). The leadframe strip (18, 19, 21) includes a die attach opening (12) through the insulating sheet (11). A plurality of metallized areas (13, 22, 23) on the insulating sheet (11) form bonding pads (13) and package leads (22). Conductive holes (14) electrically connect the bonding pads (13) and the package leads (22).

Abstract: Jet fuels are tested for thermal stability by passing the fuel over a hea metal tube and measuring the amount of residue deposited as a film on the tube as a result of chemical changes to the fuel. The thickness distribution and volume of a deposited film on a tube are calculated by scanning the length of the tube with an optical probe, shining light onto the tube, measuring the intensity of reflected light of a preselected wavelength from the tube, and correlating the reflected light intensity with positions on the tube. The tube is then partially rotated, and the process is repeated until the entire surface of the tube is scanned. The volumes of each longitudinal slice of the tube are summed to give the total deposit volume on the tube.

Abstract: A papermakers fabric and method of designing and manufacturing same which exhibits high tolerance to temperature and/or moisture variation and as a result, retains dimensional stability avoiding these problems. A specific fabric construction is selected having a defined machine direction (MD) and cross machine direction (CMD) yarn components. A mathematical model of the selected fabric structure is then defined in terms of the dimensions of the yarn components in relationship to the machine direction length of the fabric. The percent change in fabric length is then determined as a function of both the dimensions and the expansion characteristics of the MD and CMD yarns. The fabric is then designed to have calculated expansion characteristics within selected tolerances.

Abstract: An end terminated high power chip resistor-printed circuit board assembly (9) suitable for use in applications requiring miniature surface mount resistors capable of high power dissipation. An end terminated high power chip resistor (8) is constructed by coating a portion of the bottom of an end terminated chip resistor with a conductive plate (12). The end terminated high power chip resistor (8) is mounted to a printed circuit board having at least one via (23) lined with metal (20) wherein the conductive plate (12) is positioned above the via (23) lined with metal (20). A heat sink (16) is mounted to the printed circuit board opposite to the side to which the end terminated high power chip resistor (8) is mounted and is in contact with the metal (20) lining via (23).

Abstract: An apparatus for removing a cylindrical tubular elastomeric cover from and applying a cylindrical tubular elastomeric cover to a cylindrical top roll mandrel of a top roll. An attachment holder holds a selected cover removing or cover applying attachment. A cover applying attachment is held by the attachment holder for carrying a top roll cover to be applied to the top roll mandrel. A cover stripping attachment is provided for being held by the attachment holder and for stripping a cover from a top roll mandrel. A chuck is provided for holding a top roll mandrel with a cover to be removed by the cover stripping attachment, or a top roll mandrel without a cover for receiving a cover applied by the cover applying attachment. A piston and cylinder assembly moves the top roll mandrel reciprocally to and from the attachment holder and the cover applying attachment or the cover stripping attachment held by the attachment holder to thereby apply a cover to or remove the cover from the top roll mandrel.

Abstract: A process for the production of bags from thermoplastic synthetic resin sheeting with a bottom seam and/or a lateral seam fashioned as a cutoff weld seam obtained by severing tubular film sheets in the bottom zone, wherein there is produced by heat contact welding, at a station upstream of a transverse seam cutoff welding of the bottom seam or lateral seam, a wide flush weld seam over the entire width of the tubular film sheet and/or of the bag bottom to be produced, and subsequently the transverse cutoff weld seam is formed over the flush weld seam, extending within the flush weld seam.

Abstract: Bags, especially shopping bags, of a thermoplastic synthetic resin sheeting, are made to be free-standing. In the process for the production of the bags, the bags are provided in pairs. Each bag is provided with a handle hole and designed as a standing bag having an approximately sinusoidal load-bearing rim, with lateral cutoff weld seams and with a bottom pleat, with corner weld seams provided separately in the two pleat sections of the bottom pleat and extending from the bag sides obliquely toward the bag bottom, and with a flat bottom formed by the corner weld seams.

Abstract: A shopping bag of thermoplastic synthetic resin sheeting with lateral weld seams wherein, at the bag opening, the front wall is fashioned with a straight rim, and the rear wall is fashioned to project beyond the front wall with an approximately sinusoidal rim to form a protruding flap. The sinusoidal rim of the rear wall terminates either above or below the rim of the front wall in the lateral weld seams. A process for the production of the shopping bags by sinusoidal cutting apart of a film ply of a tubular sheet involves a series of sequential operation at successive stages or stations.

Abstract: The invention relates to a process and apparatus for the paired manufacture of carry bags from synthetic resin sheeting with lateral weld seams and an approximately sinusoidal load-bearing rim with punched-in handle openings, wherein a laid-flat tubular film is cut open in wave shape, and the two cut-apart semitubular sheets (1a, 1b) are pulled apart transversely to the conveying direction, the wave crests are folded over at least in part in parallel to the folding edges (3) in each case either toward the outside or toward the inside, then the semitubular sheets are again united in order to compensate for at least a portion of the gap S produced by folding over the flaps, and after achieving a synchronous run of the folded over flaps (51, 52), the latter are welded to the lower and upper sheet layers (10a, 10b) of the semitubular sheets (1a, 1b) in the area (15) surrounding the subsequent handle opening (4), the wave crests, prior to being folded over, being electrically discharged and, after having been fold

Abstract: A broadband infrared microwave modulator is fabricated with a thin film electro-optic waveguide mounted to a metal base substrate having a dielectric wafer buried therein to allow high power operation of the modulator.

Abstract: A single instruction, multiple data stream parallel computer using bit-serial arithmetic whereby the machine's basic operation is performing Boolean operations on huge vectors of 0's and 1's. The machine utilizes an architectural approach whereby the memory of a conventional machine having 2.sup.k words each t bits long, is reorganized into p registers each 2.sup.k bits in length and adding processor logic to each bit position of the registers and a communication network being added which allows for the 2.sup.k pieces of processing logic to interact. This machine is capable of executing a wide variety of algorithms at a speed of 2.sup.k /p to 2.sup.k /p.sup.2 faster than conventional machines. The machine provides for an ability to handle a variety of algorithms by interconnecting the individual processor elements in a general interconnection network capable of performing a permutation of n bits held one in every processor element in a time of (O(log(n)).

Abstract: A pressure-tight vessel for the storage of hydrogen in a metal matrix body and in which a matrix body is arranged in a tube preferably made of aluminum, the outside diameter of the matrix body before activation is less than the inside diameter of the vessel, and in which discs are provided filling the tube cross-section, which discs rest against the end faces of the matrix body and are displaceable axially outwards against resistance within the tube, as a result of which it becomes possible for the matrix body to expand in the axial direction. For a faster absorption and emission of hydrogen, the matrix body is preferably provided with a central extraction tube which is guided through the discs. Any deformation of the vessel as a result of changes in volume of the matrix body is avoided by this construction.

Abstract: Each landing gear of the undercarriage of an aircraft includes an hydraulic cylinder, and the hydraulic cylinders are interconnected through hydraulic restoring devices. The hydraulic restoring devices yieldably urge the pistons in each of the hydraulic cylinders to an equilibrium position, thereby restoring the length of each landing gear to an equilibrium length following a disturbance. In non-level landings, the hydraulically interconnected system causes the landing gear that strikes the ground first to be compressed and the other landing gears to be extended; this absorbs some of the energy of the impact. Extension of the other landing gears tends to limit the extent to which landing energy is converted to angular velocity of the aircraft caused by pivoting of the center of gravity of the aircraft about the first landing gear to contact the ground.

Abstract: An array of optical fibers is precisely positioned in channels in a head when liquid metal, such as tin-lead solder, is used. This is compared to irregular locating which is obtained with organic resins. A glass fiber is first ion plated with about 1.times.10.sup.-6 m of a metal such as nickel which is wetted by the solder. The fiber is placed loosely in a channel in a metal holder and solder is infiltrated. In an embodiment, strain on the glass fiber where it exits its holder channel is alleviated when the polymer jacket is also ion plated with metal and soldered to the holder.

Abstract: A strain isolation technique for a surface acoustic wave (SAW) device having a piezoelectric SAW substrate is disclosed. A cut in the surface of the piezoelectric SAW substrate forms an isolated surface region where active SAW signal propagation occurs. The cut prevents undesirable surface strains from affecting SAW signal propagation in the isolated region.

Abstract: An improved SAW pressure sensor structure includes a dual substrate sensor having a SAW substrate with a SAW delay line disposed in an active signal region on a first one of two parallel major surfaces thereof, and having a centrally apertured base substrate of the same material bonded at a mating surface thereof to the second one of the SAW substrate major surfaces with a glass seal, the dual substrates being bonded in crystallographic orientation, the central aperture having segmented portions to provide a major diameter opening at the mating surface coextensive with the active signal region to form a diaphragm and having a minor diameter opening at a second surface of the base substrate at a value less than one half that of the major diameter, the base substrate further including an O-ring groove adapted to receive one end of a cylindrical metal sleeve in a vacuum sealing relationship, the metal sleeve having a diameter equal to one half that of the aperture major diameter, the sleeve being bonded at anoth

Abstract: A surface acoustic wave (SAW) device having a substrate of desired material is vacuum encapsulated in a structure fabricated from the same material as that comprising the substrate.

Abstract: A plurality of different monolithic, three-dimensional thin-film infared waveguide structures having high optical power handling capability, low optical propagating loss, long propagation and interaction length and distortion-free characteristics are fabricated through high precision mechanical, chemo-mechanical, and ion-beam thinning of a bulk crystal wafer.

Abstract: A novel AC superconducting article comprising a composite structure having a superconducting surface along with a high thermally conductive material wherein the superconducting surface has the desired physical properties, geometrical shape and surface finish produced by the steps of depositing a superconducting layer upon a substrate having a predetermined surface finish and shape which conforms to that of the desired superconducting article, depositing a supporting layer of material on the superconducting layer and removing the substrate, the surface of the superconductor being a replica of the substrate surface.

Abstract: A novel AC superconducting article comprising a composite structure having a superconducting surface along with a high thermally conductive material wherein the superconducting surface has the desired physical properties, geometrical shape and surface finish produced by the steps of depositing a superconducting layer upon a substrate having a predetermined surface finish and shape which conforms to that of the desired superconducting article, depositing a supporting layer of material on the superconducting layer and removing the substrate, the surface of the superconductor being a replica of the substrate surface.