Abstract: A construction hole alignment device includes a tapered body having a smaller diameter first end, a larger diameter second end, and a series of stepped sections having progressively larger diameters extending between the first and second ends. The body has a central axis extending between the first and second ends, and the first end of the body includes a center aligned with the central axis. Each of the stepped sections has an annular outer wall. The tapered body includes flanges extending outwardly from the central axis for interconnecting adjacent stepped sections. The tapered body is insertable into a first construction hole until the outer diameter of one of the stepped sections matches the inner diameter of the first construction hole, whereby the center at the first end of the inserted body defines a target location for a second construction hole on a second floor.

Abstract: A scoop for conveniently picking up waste, such as dog feces, is constructed from a single sheet of thin material and developed into a trough shape with a rearwardly directed handle. The scoop configuration is of a shape which allows a plurality of scoops to be nested together in a convenient package.

Abstract: A scoop for conveniently picking up waste, such as dog feces, is constructed from a single sheet of thin material and developed into a triangular shape with sloping sides and rearwardly directed handle. The scoop configuration is of a shape which allows a plurality of scoops to be nested together in a convenient package.

Abstract: A leak detection cable for detecting aqueous based liquids that contain a surfactant is composed of an insulated wire conductor (1 and 2) wrapped with a water resistant yarn (3) and a braided second conductor (4).

Abstract: A leak detection system and method are disclosed in which an electrical circuit uses time domain reflectometry techniques to monitor one or more leak detection cables for impedance changes which are caused when a cable is contacted by a leaking liquid. The circuit of the system includes an electrical pulse generator means for generating a single electrical launch pulse, and for selectively transmitting the launch pulse down one of the cables. A delay means responsive to the launch pulse produces a reset signal upon the transmission of the launch pulse. A sensing means connected to a selected cable produces a trip signal upon receiving a reflected launch pulse which exceeds one or more predetermined thresholds. A latch means connected to the sensing means latches (sets) upon receiving the trip signal and unlatches upon receiving the reset signal. A counter means which is responsive to the reset signal and the trip signal measures a time difference therebetween.

Abstract: A single chamber continuous chemical vapor deposition (CVD) reactor is described for depositing continuously on flat substrates, for example, epitaxial layers of semiconductor materials. The single chamber reactor is formed into three separate zones by baffles or tubes carrying chemical source material and a carrier gas in one gas stream and hydrogen gas in the other stream without interaction while the wafers are heated to deposition temperature. Diffusion of the two gas streams on heated wafers effects the epitaxial deposition in the intermediate zone and the wafers are cooled in the final zone by coolant gases. A CVD reactor for batch processing is also described embodying the deposition principles of the continuous reactor.

Abstract: A susceptor for use in a rotary disc reactor comprises a disc having a plurality of radial slots formed adjacent the periphery of the disc. The slots are circumferentially spaced from each other such that the oppositely-flowing heating currents in the sectors disposed between the slots are forced to be adjacent each other to cause a cancelling effect. A plurality of such discs may be supported in stack-like relationship by supporting posts having the ends thereof adapted to fit into the radial slots. Each disc also has radiation shielding means attached to and extending beyond the periphery thereof. The radiation shielding means is made of a material different from the susceptor material of the disc.

Abstract: An improved liner for crucibles and dies used to melt silicon comprising one or more sheets of graphite each of which has on at least the surface facing the silicon melt a layer of silicon nitride or silicon oxynitride.

Abstract: A method and apparatus for growing crystal ribbon from a liquid melt by the EFG technique includes the use of a die having a capillary feed passage adjacent the ribbon pulling mechanism and gas scrubbing passages on each side of the capillary feed passage. Thus, gas entrapped in the liquid melt can diffuse through the gas scrubbing passages to minimize the presence of microvoids in the ribbon. In a particular embodiment, the capillary die can include lateral communicating passages between the capillary feed passage and the gas scrubbing passage so that gas in the capillary feed passage can diffuse out to the gas scrubbing passage.

Abstract: The thermal profile at the top of an EFG die is improved by including heat radiation deflectors within the crucible to change the level of radiation heating experienced by at least some portions of the die.

Abstract: A crucible for containing a melt and die for EFG growth of sapphire is supported by a pyrolytic graphite crucible support plate having the C axis of the pyrolytic graphite perpendicular to the bottom of the crucible which is supported by the plate. This thermally insulates the crucible from the pedestal which supports the support plate.

Abstract: An improved apparatus characterized by an R-F coil, a crucible for confining a silicon melt, and a susceptor for supporting the crucible facilitating an electrical coupling of the coil with the melt. The susceptor comprises a pair of susceptor halves of a thickness less than two skin depths, each being the mirror image of the other, disposed in mutually opposed, electrically insulated relation, while the crucible comprises a quartz body supported by the graphite susceptor, whereby the R-F coil is electrically coupled with the melt.

Abstract: An auxiliary tool for holding a rotatable fastener in engaged relation with a driving tool until the fastener can be started into the work is versatile and can be used with many different kinds of driving tools. In use, the present tool is secured magnetically to a ferrous metal portion of the driving tool. Spring rods on the tool can be separated and engaged with a fastener to hold the fastener therebetween and in engagement with the driving portion of the driving tool. Once the fastener is well started into the work, the present tool can be quickly and easily removed to permit the driving tool to be used alone.

Abstract: A tool attachment for holding a fastener to a driver therefor comprises a magnetic holding assembly to which are attached spring fingers for grasping a fastener. The construction of the magnetic holding assembly provides for attachment of the device to elongated shafts of various shapes and sizes. The magnetic holding assembly is particularly characterized by an elongated, centrally-disposed pole piece which extends in the same direction as the axis of rotation of the shaft of the driver tool, when the attachment is in place. Magnets are attached to opposite sides of the pole piece in like-pole to like-pole relation, and the holding force so provided is quite high.

Abstract: In combination with a susceptor particularly suited for use in growing a ribbon crystal employing edge-defined film-fed growth techniques and characterized by a susceptor including a die through which a melt is drawn for forming a crystal ribbon, a pair of jets for directing a stream of fluid coolant along a path extended to impinge on the susceptor in close proximity with the die in non-incident relation with the crystal being grown.

Abstract: A drawing template for forming relatively large alphanumeric characters is comprised of a thin substrate in which a plurality of both linear and non-linear slots are formed. Lines drawn through selected ones of the slots form an outline of a desired character.

Abstract: Apparatus for pulling a ribbon shaped crystal from a melt of the same downwardly through a shaping guide having a "V" shaped longitudinal trough for containing the melt. The inner wall of the trough is a die set having a longitudinal slit at the apex of the "V".

Abstract: Mechanical components such as dies and crucibles, which come in contact with a silicon melt during the formation of single crystalline shaped silicon particles, e.g. thin sheets or ribbons, are coated with silicon oxynitride deposited by chemical vapor deposition techniques.

Abstract: An integral graphite susceptor of the type comprising a hollow polyhedron, adapted to support a semiconductor substrate on an outer planar surface of a wall thereof, has a recessed cavity adjacent the inner surface of the wall and shaped so that the floor of the cavity is parallel to the outer planar surface. The cavity may comprise an oblong-shaped slot machined into the wall of the susceptor, which is typically a hollow truncated pyramid.