Abstract: A structure, such as for a full-size stadium roof, which has a retractable central portion capable of opening up about one-half of the total roof area. Two retractable roof panels, rectangular in plan, cover an area that can be larger than a football field, and move in the direction of the main axis of the stadium.

Abstract: In a method for decreasing the alcohol content of alcohol-containing beverages, particularly wine or sparkling wine, according to the reverse osmosis process, extract substances are added to the dealcoholized beverage. In order to avoid addition of foreign water to the beverage, the alcohol-containing permeate obtained by reverse osmosis from the beverage subjected to dealcoholization is distilled in a vacuum. The permeate water produced therefrom is re-fed to the beverage subjected to the dealcoholization. The amount of permeate distillate removed from the beverage subjected to dealcoholization by the reverse osmosis and subsequent vacuum distillation, which essentially consists of alcohol, is fed to the beverage subjected to the dealcoholization in the form of water, which has also been obtained by vacuum distillation from an additional beverage. In this manner, particularly high quality sparkling wine may be produced.

Abstract: A method of treating formed refractory articles for protection against attack by molten aluminum metal, including the steps of impregnating surface portions of the formed articles with an aqueous solution of magnesium fluosilicate and heating to decompose the magnesium fluosilicate for producing, in situ, fluoride values that inhibit wetting of the treated surfaces by the molten metal. Colliodal alumina may be incorporated in the impregnating solution. A silicate coating may be applied over the impregnated surface portions; in such case, the coating when dried is itself impregnated with a further application of magnesium fluosilicate solution. The treated articles have anti-wetting fluoride values on or in their surface portions and exhibit enhanced resistance to attack by molten aluminum.

Abstract: A method of setting up tooling on parallel rotary arbors for cutting plural parallel longitudinal slits in a web of sheet material advancing between the arbors, using a set of tooling comprising multiple circular cutter elements and multiple circular spacer elements, the elements having various nominal axial lengths with a common axial length tolerance of .+-.t. Each element, measured to determine the deviation between its actual and nominal axial length, is detectably identified (e.g. by color coding) with one of plural discrete successive subranges of the overall tolerance range .+-.t, viz., with that subrange in which its measured axial length deviation lines.

Abstract: An anodic oxide film is formed on aluminium strip by continuously passing the strip through a phosphoric acid electrolyte at from 25.degree. C. to 80.degree. C., the contact time between the strip and the electrolyte being not more than 15 seconds during which time the strip is anodized at a current density of at least 250 A/m.sup.2. In the resulting film, the pores are enlarged so that the effected surface area is increased. The film forms an excellent substrate for lacquer, paint, or adhesive.

Abstract: An input buffer circuit comprised of MOS transistors includes an input terminal for receiving a tri-state input signal capable of taking any one of three potential levels, such as V.sub.pp, V.sub.cc and V.sub.ss. The input buffer circuit also includes a first detecting circuit having a first threshold level located between V.sub.pp and V.sub.cc and a second detecting circuit having a second threshold level located between V.sub.cc and V.sub.ss. Also provided is a third detecting circuit connected to the first and second detecting circuits to determine the level of the input signal applied to the input terminal.

Abstract: In a telematic system, a plurality of response timings for a page boundary command, a page end command and the like from a sending system are prepared. A proper timing is selected in accordance with the type of sending system or an instruction from the sending system.

Abstract: A method for detecting or removing a substance in a medium is presented. Magnetic material, particularly magnetic bacteria or magnetic particles contained therein, are treated to render them receptive to binding or attachment to the substance sought to be detected or removed. Following binding or attachment to the treated magnetic material, the medium is subjected to a magnetic field, which results in removal of the magnetic material and the substance bound or attached thereto.

Abstract: A method of determining the depth of the molten electrolyte layer in an aluminium electrolytic reduction cell, and using the measurement to control the operation of the cell, is based on the fact that when an anode is raised, the current passing through it drops to zero when the anode carbon face loses physical contact with the molten electrolyte. The method involves raising the anode and noting the distance travelled before the current falls to a predetermined fraction of its initial value. The method is well adapted to automatic control of electrolyte depth.

Abstract: Apparatus and procedure for applying a paint or like coating to an elongated strip article using a coating head having an open-sided slot to which coating material is supplied under pressure, and a support such as a roll around which the strip is advanced past the head for receiving from the slot a layer of paint metered between the head and the strip, wherein a load is continuously exerted on the head during operation for urging the head against the applied paint layer on the strip so as to maintain a uniform metering gap between the head and the coated strip surface. The load may be exerted by devices such as air cylinders acting on the head and capable of adjustment to vary the magnitude of the load for different coating operations.

Abstract: An electrical power control apparatus in which power to a load is shared between a plurality of power semiconductors, only one of which is shown. Each power semiconductor forms part of a separate servo loop comprising, in its simplest form, a current sensor whose output signal modulates the output pulse width of a signal generator. The output from the signal generator is used to control the conduction times of the power semiconductor via drive circuit. Although it is possible, indeed desirable, to synchronise operation of the signal generators of the different servo loops, the loops are completely independent of one another, and the instantaneous pulse width of the drive pulses in any one servo loop is controlled only by the characteristics of that loop.

Abstract: An aircushion and fluid film bearing arrangement particularly suitable for supporting the undersurfaces of the outer edges of the transport belt in a horizontal belt vacuum filter is disclosed wherein the respective air box sections beneath the edges are fabricated into parallel members each exteriorly rectangular in form and having an air pressure chamber therein triangular in cross-section with its apex forming a longitudinal slot centrally disposed in the flat upper surface of the box, which slot communicates the air pressure admitted to the chamber to the upper surface of the box. Longitudinal sealing guides are upstandingly mounted on the upper edges of each air box and form fluid-pressure chambers above the flat upper surfaces in cooperation with the undersurface of the transport belt, which chambers contain the communicated air pressure and create a fluid cushion exerting evenly balanced supporting forces across the outer undersides of the belt.

Abstract: There is disclosed a system for reading a meter, e.g., a utility meter, over a telephone line. The system includes circuitry for detecting when an input signal within a predetermined frequency range is present. The input signal is fed to two timing devices. One of the timing devices is set to produce a constant output when the input frequency is above the higher limit of the predetermined frequency range. The other device is set to produce a constant output when the frequency is above the lower limit of the same range. The outputs of both timing devices are connected to logic circuitry. The two timing devices are connected to the telephone line. When a signal in the selected frequency range is received from the telephone exchange, the frequency detector acknowledges to the exchange the receipt of that signal, and activates a recorder in a meter reading apparatus at the subscriber's location to transmit the recorded reading of the meter over the telephone line to the exchange, where it is suitably recorded.

Abstract: An improved carriage assembly for use in ink jet printers is provided. The present ink jet printer carriage assembly includes a holder for holding an ink droplet projection nozzle and a charging electrode for charging ink droplets and the holder is so structured that it may be pivoted vertically as well as horizontally. Thus the ink jet projection direction may be adjusted with respect to its pitch direction as well as yaw direction. A deflection stage including a pair of oppositely arranged deflector electrodes is fixedly mounted on the carriage body; however, a gutter for collecting non-deflected ink droplets is adjustably provided. With such a structure, the whole assembly may be constructed quite with ease since minor mismatches may be corrected after assemblage; moreover, printed characters or images of excellent quality may be obtained.

Abstract: Web-type stock material having upwardly projecting filamentary elements and a defined periphery, comprising, in combination, a flexible base member for overlying a floor surface in immediately surrounding relation to a liquid egress opening in the surface, the base member having a central hole for register with the egress opening; and a three-dimensional mat carried by the base member and comprising filamentary elements distributed throughout a volume extending horizontally at least over the entire area of the hole and vertically upwardly above the base member to a locality spaced above the base member for engaging and arresting liquid-carried debris such as hair outside and above the egress opening while permitting flow of liquid downwardly into the egress opening.

Abstract: This invention relates to a method for the non-surgical treatment of tumors. The method of this invention involves the use of shock waves to effect subcellular destruction of tumor cells, to alter their tumorigenic potential, and to suppress tumor growth.

Abstract: The present invention provides a metal oxide magnetic substance represented by the general formula I:MeO.multidot.n[Al.sub.X M.sub.Y Fe.sub.2-x-(m/3)Y O.sub.3 ](wherein, Me is at least one member of Ba, Sr and Pb, M is at least one member of Zn, Sc, In, Cr, Ir, Ru, Rh, Ti, Ta, Sn and Ge, 5.ltoreq.n.ltoreq.6, 0<X.ltoreq.0.8, 0<Y.ltoreq.0.6, and m is the ionic valency of M), a magnetic film consisting thereof, and a magneto optical recording medium and a perpendicular magnetic recording medium having the magnetic film.

Abstract: The present invention provides a metal oxide magnetic substance represented by the general formula I:MeO.n[Ga.sub.X M.sub.Y.sup.I Fe.sub.2-X-(m/3)Y O.sub.3 ](wherein, Me is at least one member of Ba, Sr and Pb. M.sup.I is at least one member of Zn, Sc, In, Cr, Ir, Ru, Rh, Ti, Ta, Sn and Ge, 5.ltoreq.n.ltoreq.6, O<X.ltoreq.0.8, O<Y.ltoreq.0.8 and m is the ionic valency of M.sup.I) or represented by the general formula II:MeO.n[M.sub.T.sup.II Fe.sub.2-T O.sub.3 ](wherein, Me is at least one member of Ba, Sr and Pb, M.sup.II is at least one member of Ga and Al, 5.ltoreq.n.ltoreq.6 and O<T.ltoreq.1.0), a magnetic film consisting thereof, and a magneto optical recording medium and parpendicular magnetic recording medium having the magnetic film.

Abstract: A piston for combustion engines has connecting rod mounting apertures or pin bosses for receiving a gudgeon pin for a connecting rod, which bosses have resilient regions in the form of annular resilient sectors (17, 16) by the formation of slots in the axial direction of the piston. These annular spring sectors can however also be provided on the little end. Upon the occurrence of disturbing oscillations coming from the region of the crank shaft, these are transmitted axially of the resilient annular sectors and suppressed.

Abstract: A method for controlling the rate of aluminum fluoride addition to a cryolite-based electrolyte of an aluminum electrolytic reduction cell makes use of the known ratio between cell temperature and bath (NaF:AlF.sub.3) ratio. A target temperature is established corresponding to a target bath ratio. The cell temperature is measured at intervals and the rate of AlF.sub.3 addition altered depending on whether the measured temperature is above or below the target temperature. The method is faster than traditional methods involving analysis of electrolyte samples, and is amendable to computer control.