Abstract: A method for assembling microstructures onto a substrate through fluid transport. The microstructures being shaped blocks self-align into recessed regions located on a substrate such that the microstructure becomes integral with the substrate 20, 70, 90, 120, 200. The improved method includes a step of transferring the shaped blocks into a fluid to create a slurry. Such slurry is then poured evenly over the top surface of a substrate having recessed regions thereon. The microstructure via the shape and fluid tumbles onto the surface of the substrate, self-aligns, and engages into a recessed region.

Abstract: A method for detecting the presence of a substance in a heterogeneous sample or article (i.e., a contraband substance) in a magnetic field includes establishing a level-crossing condition (B.sub.LC) for the substance to be detected for a set time (t.sub.b), and subsequently measuring nuclear magnetic resonance (NMR) signals to detect some consequence of the level-crossing condition. A saturating signal is applied at the begining of each cyclic test. Apparatus for detecting the presence of predetermined substances is also disclosed.

Abstract: A method of Nuclear Quadrupole Resonance testing includes the steps of applying to a sample in which selected nuclei have an integral spin quantum number a series of at least three pulses of electromagnetic waves at a single radiofrequency to excite quadrupole resonance of the selected nuclei, and detecting responses at a plurality of times when echo response signals are expected to occur.

Abstract: The invention provides a controlled coefficient of thermal expansion alloy having in weight percent about 26-50% cobalt, about 20-40% nickel, about 20-35% iron, about 4-10% aluminum, about 0.5-5% niobium plus 1/2 of tantalum weight percent and about 1.5-10% chromium. Additionally the alloy may contain about 0-1% titanium, about 0-0.2% carbon, about 0-1% copper, about 0-2% manganese, about 0-2% silicon, about 0-8% molybdenum, about 0-8% tungsten, about 0-0.3% boron, about 0-2% rhenium, about 0-2% hafnium, about 0-0.3% zirconium, about 0-0.5% nitrogen, about 0-1% yttrium, about 0-1% lanthanum, about 0-1% total rare earths other than lanthanum, about 0-1% cerium, about 0-1% magnesium, about 0-1% calcium, about 0-4% oxidic dispersoid and incidental impurities. The alloy may be further optimized with respect to crack growth resistance by annealing at temperature below about 1010.degree. C. or temperatures between 1066.degree. C. or 1110.degree. C.

Abstract: The invention provides a controlled coefficient of thermal expansion alloy having in weight percent about 26-50% cobalt, about 20-40% nickel, about 20-35% iron, about 4-10% aluminum, about 0.5-5% niobium plus 1/2 of tantalum weight percent and about 1.5-10% chromium. Additionally the alloy may contain about 0-1% titanium, about 0-0.2% carbon, about 0-1% copper, about 0-2% manganese, about 0-2% silicon, about 0-8% molybdenum, about 0-8% tungsten, about 0-0.3% boron, about 0-2% rhenium, about 0-2% hafnium, about 0-0.3% zirconium, about 0-0.5% nitrogen, about 0-1% yttrium, about 0-1% lanthanum, about 0-1% total rare earths other than lanthanum, about 0-1% cerium, about 0-1% magnesium, about 0-1% calcium, about 0-4% oxidic dispersoid and incidental impurities. The alloy may be further optimized with respect to crack growth resistance by annealing at temperature below about 1010.degree. C. or temperatures between 1066.degree. C. or 1110.degree. C.

Abstract: An oxidation resistant alloy containing iron, cobalt, nickel and at least 4 to 5% by weight aluminum having at least a duplex crystalline structure. One crystalline component of this structure is a gamma (fcc) phase having a gamma prime phase dispersed therein. The second crystalline component is enriched in aluminum compared to the first crystalline component and exhibits characteristics under X-ray diffraction and electron diffraction analysis of a BCC B2 structured phase.

Abstract: A track conversion unit for wheel-driven tractors in which the forward steerable wheels and their axle of the wheel tractor are removed from the wheeled tractor and replaced with tandem wheel units respectively secured to the forward end of the tractor--one at each side--by a bracket attachment for connection therewith. These tandem wheel units include two inflated tires with tread and at each side of the tractor, a crawler track extends about these inflated tires from a regular large size treaded rear drive wheel of the tractor for the purpose of being driven in crawler-like fashion over snowbound and rough terrain areas. With the steerable wheels detached, the tractor with the crawler track treads will be dependent upon the trailing equipment for steering the tractor, which steering equipment will be connected through hydraulic means with the steering wheel of the tractor to be available to the driver.

Abstract: The detection of compounds containing both nuclei of a kind which exhibit nuclear magnetic resonance (nmr) and nuclei of a kind which exhibit nuclear quadrupole resonance (nqr), for example compounds containing both .sup.1 H and .sup.14 N nuclei, is carried out by subjecting a substance suspected of containing such a compound to a magnetic field and repetitively to three parallel activities A,H and B. Activity A comprises two similar rf pulse sequences P.sub.A and P.sub.B at the nmr frequency. Activity H is a temporary change in the value of the magnetic field, which may be a reduction to zero. Activity B is the application of additional rf signals. Activity H and/or activity B are different during each of the respective pulse sequences P.sub.A and P.sub.B. The activity B rf signals are at one or more frequencies selected so that in combination with the activity H in at least one of the pulse sequences the subsequent nmr signal is modified if such a compound is present.

Abstract: An apparatus for harvesting crayfish and similar crustaceans from ponds utilizing a hollow tube placed in the pond and provided with openings sized to allow crayfish to enter the hollow tube where they are pushed through the tube by the action of a plug being moved through the tube.

Abstract: Controlled low expansion alloys containing nickel, titanium, columbium, silicon, etc., and optionally cobalt can be heat treated using relatively short periods of time. Aging treatments can be less than eight hours, for example, four hours.

Abstract: Alternating layers of N+ GaAs (80 .ANG.) and N+ Ga.sub.1-x Al.sub.x As (300 .ANG.), all heavily doped with a uniform flux of Sn, and biased by 2V, provide a multiple quantum-well heterojunction structure for infrared detection with cutoff wavelength established by the choice of the value x which defines the depth of the wells. Fine tuning of the cutoff wavelength may be achieved by varying the bias voltage. By biasing the individual quantum-well layers progressively through a voltage divider, an avalanche mechanism may be achieved in the detector for signal amplification. The detectors may be fabricated in large two-dimensional arrays.

Abstract: A skid rail for a reheat furnace which supports the slabs or work pieces moving therethrough without excessive cooling or tiger striping of such work pieces including a hollow structural member having an upper surface, a wear bar having a plurality of support blocks secured thereto for supporting the wear bar in a position above the upper surface of the structural member, cleats engaging the blocks to secure the wear bar on the surface and insulation under the wear bar and around the blocks and cleats, the material of the wear bar and the blocks having low thermal conductivity and high strength when subjected to the elevated temperatures of the reheat furnace.

Abstract: In an age hardenable controlled expansion alloy essentially devoid of chromium, the combination of short term tensile properties and elevated temperature properties, particularly notch rupture strength, are improved by the inclusion therein of silicon in an amount leass than 1%.

Abstract: Fuel apparatus including a fuel vaporizing portion, an air conveying portion, a heating portion and a flow control portion; the fuel vaporizing portion including an enclosed chamber, the chamber including a liquid reservoir section and a vapor expansion section, the vapor expansion section including a plurality of baffles providing a tortuous path through the expansion section, a liquid fuel inlet to the chamber and a vapor outlet from the chamber, a first vapor conduit connecting the chamber outlet with a carburetor of an engine, a second vapor conduit connecting the engine carburetor with the chamber adjacent the vapor expansion section thereof; the air conveying portion including an air intake section, a divider for air flowing through the air intake section, a first duct for conveying one part of the air flow to a point adjacent the liquid reservoir section of the enclosed chamber, a second duct for conveying a second part of the air flow to the first vapor conduit; the heating portion being disposed adja

Abstract: A flange protector (P) is adapted for attachment to a machined surface (S) of a flange (F) of the type having an annular ridge (20) and a plurality of bolt holes (14), which bolt holes (14) extend from surface (S) through the flange. A cover (10) of flexible material has one side (10s) shaped substantially conforming to the shape of the machined surface (S) and extends over the bolt holes (14) to engage and protect the machined surface (S). A plurality of fastening means (M) extend from the engaging side (10s) of the cover (10) for frictionally engaging the interior surface (14i) of bolt holes (14) to retain the engaging side (10s) in engagement with surface (S). Each fastening means (M) includes an elongated tubular shank (12) extending from the cover (10) to an open end (12e). Each tubular shank (12) is hollow, having an inner bore (12b) substantially from the cover (10) to the open end (12 e).

Abstract: An arcuate card-clothed element is manufactured by combining a deformable sustaining element which may for example be a slotted stiffener or a layer of fibre glass with a flexible toothed foundation while the sustaining element is in a deformable condition and shaped to the desired arcuate contour of the card-clothed element, and introducing a hardenable bonding medium such as a resin to hold the foundation in the shape of the sustaining element and convert the sustaining element to a substantially rigid state. The card-clothed element may be made in individual sectors, or may comprise sectors cut from a cylindrical assembly built on a former.

Abstract: An apparatus for removing cartons from a stack of cartons arranged in horizontal layers with pairs of cartons in each layer arranged in perpendicular relatonship with adjacent pairs includes first gripping means for lifting a layer of cartons from the stack and separating cartons in the layer into two groupings and second gripping means adapted to grip each grouping of cartons and further separate cartons in the grouping for deposition at a spaced location. The second gripping means consists of reciprocating heads at least one of which is adapted to pivot about a vertical axis so as to reorient selected cartons so that the cartons can be deposited at the spaced location in parallel relationship. Further, the second gripping means are pivotal about a horizontal axis so as to be swingable into an out of the way position to allow another of the second gripping means to move along a preselected path from the first gripping means to the spaced location.

Abstract: An apparatus for assembling cartons and delivering the cartons in rows to preselected locations includes a framework upon which a conveyor is positioned to receive cartons and to advance the cartons to an assembly station, a stop gate at the assembly station adapted to stop-forward movement of the cartons as they are received at the assembly station, a positioning gate at the assembly station mounted for lateral, reciprocal movement to alternately shift cartons received at the assembly station in opposite lateral directions until a complete row of cartons extending laterally of the apparatus is assembled at the assembly station and a pair of pusher members disposed adjacent the assembly station to push the assembled row of cartons off the forward end of the apparatus.