Abstract: A split correction-imaging ribbon comprising a longitudinal strip of film-base adhesive correction composition and an adjacent longitudinal strip of film-base pressure-transferable imaging composition. The two strips are overlapped and bonded together by means of the adhesive correction composition to provide a unitary element such as a typewriter ribbon which is bifunctional, i.e. capable of producing typed images on a copy sheet and also capable of removing such typed images as may be erroneous.

Abstract: A hot air duct is formed from thin walled metal tubing. The duct is provided with a plurality of linearly spaced reinforcing rings. Each reinforcing ring is formed from sheet metal and is channel-shaped in cross-section. The rings are rigidly secured to the outer surface of the duct and positioned so they project radially outwardly from the duct with the channel portion inwardly open and facing the outer surface of the duct. With this arrangement the channel portions are closed off, defining ring shaped chambers around the duct. Each ring shaped chamber surrounding the duct is provided with holes to provide communication between the ring-shaped chamber and the ambient air around the external surface of the duct.

Abstract: A compact ratchet mechanism for box end or similar wrenches comprises a driver ring with cam teeth on one face, a driven ring rotatably confined in the driver ring and having the wrench configuration in its interior, and a pawl ring rotatably supported on the driven ring. The pawl ring has cam teeth cooperating with the driver cam teeth, and the pawl ring and driven ring have shorter interfitting teeth. The cam teeth have sufficient rise to hold the shorter teeth engaged when the driver ring is rotated one way, and to allow the shorter teeth to disengage when the driver ring is rotated the other way.

Abstract: An apparatus for providing information, for example, tourist information, comprising a sound reproducing device which can receive a prerecorded tape, such as a cassette, having informative touring information for a specific location, the apparatus being manually energizable and being shut off at predetermined points by the tape. The tape can have numbers thereon viewable by the operator and for indicating the road exit or location.

Abstract: An anodizing system uses both positive and negative current pulses. Such pulses are adjustable to achieve different adjusted values of positive and negative currents. These values are sensed and used to maintain automatically such values. The ratio of negative current to positive current is preferably greater than 3% for the production of relatively thick, dyeable, hard anodized coatings and conventional (normal) anodic coatings of light shades of integral colors using a simple sulfuric acid bath which may be maintained at relatively high temperatures. Current may be applied at nearly full current density initially without burning. In some cases, additional means may be provided to increase the throwing power by eliminating the negative current and using means such as capacitors or inductors to prolong the decay of the positive pulses, preferably such that the then composite positive pulses are maintained above a zero value.

Abstract: Pentachloronitrobenzene having less than 0.6% hexachlorobenzene is prepared by reacting pentachlorobenzene with mixed nitration acid at a temperature in the range of 100.degree.-120.degree. C then heating the reaction mixture to an intermediate temperature to deplete excess nitric acid prior to melting and recrystallization.

Abstract: Disclosed are chlorinated low unsaturation rubbers exhibiting improved adhesion properties and improved covulcanization ability with high unsaturation rubbers. Also disclosed is a method of preparing these rubbers which comprises reacting the chlorinated rubber with certain bromine and/or iodine containing compounds.

Abstract: An improved seed planting roller for planting seeds in individual holes in the ground, and having means for reclosing the hole over the planted seed. Also, means are shown for altering the circumference of the roller for adjustment of planted seed spacing.

Abstract: An improved gown belting means is described for back-closure gowns, or gowns commonly known as "sterile back" gowns, having one tie attached to the gown at the outer edge of a rear panel with an intermediate segment of the tie retained in a tunnel loop near the inner edge of the rear panel and a portion of the free end of the tie looped in a transfer tab, and a second tie attached to the gown at the inner edge of a second rear panel, having an intermediate segment releasably attached to the gown or held within a loop. The second tie has a free, unattached end retained at or above waist-level by the attached intermediate segment.

Abstract: An improved housing embedded in the ground for use in crushing of ore. The housing has a generally figure eight configuration in plan defined by a pair of hollow, upright cylindrical segments with a common wall between the points of intersection of the segments. One segment houses a dump pocket, an ore crusher, a surge chamber and a discharge feeder and conveyor in descending order, and the other segment contains drive machinery, dust control apparatus, a lubrication system, hoist ways, elevator shaft, and other service facilities. The crusher in the first segment is supported on a floor supported by the wall of the first segment itself. The housing requires only a minimum of concrete and reinforcing steel since the cylindrical configuration of the sections thereof provide the most efficient resistance to lateral pressures resulting from earth backfill and surcharge from heavy haul trucks.

Abstract: A dry duplicating method comprising the steps of pressure-imaging a continuous master web with images capable of exuding liquid ink under the effects of contact pressure such as roller pressure and collecting the imaged master web on a roll for duplicating use. The master web is such that at least one surface is receptive to the pressure-applied images but neither surface is capable of absorbing the liquid ink to any substantial degree. The imaged web is duplicated by continuously bringing it into surface contact with an ink-absorbent copy web while pressure is applied to exude the liquid ink from the master images onto the copy web to form a duplicate copy, after which the web is continuously rolled up on another roller for reuse.

Abstract: The apparatus and the method of the invention dyes the yarn ends of a sheet thereof individually at predetermined positions along their lengths and manufactures tufted carpets therefrom in a tufting machine to provide a predetermined multi-colored complex pattern in the carpet. The invention includes pretreatment of the yarn in a wetting and cleansing bath, removing excess bath liquid in preparation for dyeing, synchronizing the yarn feed at the start with the feed to the tufting machine, simultaneous dyeing of pairs of adjacent yarn ends and separating them for delivery to the tufting machine in an arrangement to produce identical patterns side-by-side in the carpet.

Abstract: A battery charger receives electrical power from an external source of direct current electrical power. The power is received through a first inductor which supplies it to a second node. First switching means receives the power from the second node and supplies it to a third node. A second inductor receives the power from the third node and supplies it to the battery to be charged through output connector means. Second switching means are connected to the second node and to a capacitor which is connected to the third node so that the second switching means can switch the capacitor between series circuit and parallel circuit configurations with respect to the first and second inductors. A safety circuit is connected to temperature sensing means positioned to sense the temperature of the battery to be charged, to the first node and to the first switching means. The safety circuit causes the first switching means to become nonconductive upon detection of unsafe conditions which may occur when charging.

Abstract: Short term creep compensation for load cells, platform scales, bench scales and the like is achieved by introducing a thermo-couple in series with one of the output leads from the load cell and utilizing an amplified output signal derived from the original output signal to generate heat which is transferred to a terminal or both terminals of the thermo-couple. The thermo-couple provides a compensating signal which is equal and opposite to the output drift resulting from the creep characteristics so that the final output signal is fully compensated. Proper generation of the compensating signal can be controlled by the gain of the amplifier, polarity of the input signal to the amplifier, and the transfer characteristics from the heater to the thermo-couple terminal.

Abstract: Horizontally loaded load cells are isolated by using an integrally formed flexure in the load cell body. Two or more of these cells can be secured to a platform to form a platform scale and the flexure isolation prevents the introduction of interaction terms resulting from extraneous torsion forces or moments from off-center loading on the platform.

Abstract: This disclosure describes mixtures of novel sulfonyl-substituted 1,2,4-triazole-3-carboxamides which possess antiviral activity.

Abstract: An improved construction for electrically illuminated otoscopes whereby more light is provided and the light is whiter and more uniform than the light output of prior art instruments. To obtain more light, a larger than normal lamp is employed which preferably is a halogen lamp as the latter gives a whiter light than a vacuum lamp and has a longer life span. Since a larger lamp produces more heat and would be more of an obstruction if positioned in the usual location, the lamp is positioned in the base of the instrument and its light is transmitted from there to a point in the viewing passage through the instrument by a bundle of optical fibers. The fiber bundle minimizes viewing passage obstruction and assists in providing the uniform, diffuse illumination that is desired without light loss.

Abstract: A control computer produces a position error signal in accordance with the difference between the desired position of a controlled device and the actual position of the controlled device. The position error signal is amplified and compensated to produce a series of discrete control pulses of controlled but variable duration which regulate a servo actuating system connected to the controlled device so as to reposition the controlled device to the desired position. The servo actuating system is a simple on-off integrating valve which does not depend on feedback or other techniques to regulate the position of the controlled device in response to the control pulses from the control computer.

Abstract: In a foil gas bearing or other similar machine element the relatively rigid shaft is coated with a glaze-forming oxide layer between 0.003 and 0.020 ins. thick, while the relatively thin foils are coated with a layer of a compound comprising cobalt and chromium carbide to a depth of up to 0.003 ins., the surface layer of which is oxidized to a depth of 0.0001 ins. to 0.0005 ins.