Abstract: Oxide deposits containing chromium are dissolved by contacting the deposits sequentially with(i) a permanganate salt in acid solution to remove chromium therefrom as hexavalent chromium;(ii) a reducing agent in acid solution to destroy excess permanganate ions and manganese dioxide formed by reduction of the permanganate; and(iii) a mixture of a reducing agent and complexing acid to dissolve the residual chromium depleted oxide.

Abstract: The restoration of monuments and other objects made of stone is described. The process is carried out by immersing the stone object in deionized water in order to dissolve the calcium sulfate contamination present on the deteriorated stone which is caused by the pollutants present in air, then circulating the water containing the dissolved calcium sulfate through an ion exchange resin which can selectively trap the sulfate and release calcium hydroxide into the solution, followed by exposure to carbon dioxide under controlled conditions in order to thereby reprecipitate the calcium ions on the stone object as the carbonate in the calcite crystalline form.

Abstract: Fluorine-containing phosphonates and phosphonic acids are described. The method of preparation is a reaction of trialkylphosphites with dihalodifluoromethanes or a reaction of the salts of dialkylphosphites with halodifluoromethylphosphonates. The corresponding phosphonic acids are prepared by hydrolysis of the phosphonates.

Abstract: Compounds of general formula: ##STR1## wherein X represents a hydrogen or halogen atom, R represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms and A represents the 1,2,5,6-tetrahydro-4-pyridyl or the 1,2,3,4,5,6-hexahydro-4-pyridyl radical, with the proviso that when A is the 1,2,3,4,5,6-hexahydro-4-pyridyl radical, R is alkyl having 1 to 3 carbon atoms, are disclosed together with methods for their preparation and their use in the treatment of migraines, as antithrombosis agents or as rapid acting thymoanaleptic medicaments.

Abstract: The invention concerns the oilproofing and waterproofing treatment of construction materials by applying to them a composition which comprises by weight:(A) from 0.1 to 25% of a fluorinated copolymer formed from(1) 5 to 70% of a fluorinated ester of the formula: ##STR1## in which Rf represents a perfluoro-alkyl radical, Q represents an oxygen or sulfur atom, W represent a bivalent linkage, one of the symbols R represents a hydrogen atom and the other a hydrogen atom or an alkyl radical,(2) 4 to 50% of a monomer of the formula: ##STR2## in which R' represent a hydrogen atom or an alkyl radical and R' represents an alkylene radical and(3) 0 to 91% of any other monomers'(B) from 2 to 25% of a polyisocyanate or isocyanate prepolymer;(C) from 0.1 to 10% of a catalyst; and(D) one or more diluting solvents to make up to 100%.

Abstract: A process and catalyst is disclosed for the reduction of the ignition temperature of diesel soot filtered out of the exhaust fumes of diesel engines by passing the exhaust stream through a filter element. The filter element is a temperature resistant inert support onto which is deposited a catalytically effective amount of silver vanadate or a mixture of the temperature resistant carrier material and a catalytically effective amount of silver vanadate.

Abstract: A liquid composition is disclosed which is useful in the fabrication of concrete articles. The composition may be used to coat molds or forms into which freshly mixed concrete is poured, or it may be used as an additive to the concrete. Formed of a diesel fuel oil and rosin, the mixture is found to result in speeding up of the curing of the freshly poured concrete, water proofing of concrete, fireproofing concrete and acting as a rust inhibitor. Additionally, the mixture enables the reduction in thickness of cast sections without sacrificing strength. Also, the mixture enables freshly made concrete to be used for bonding to old concrete to obtain a very strong bond.

Abstract: An apparatus for the catalytic transformation of fuel for use with an internal combustion engine is described. The apparatus comprises a catalytic reactor in the form of a chamber containing catalytic material, and through which liquid or vaporized fuel is passed, the reactor chamber being in close thermal communication with the exhaust gases leaving the internal combustion engine. Said reactor chamber is either placed within the exhaust gas chamber of the engine exhaust manifold, or in very close proximity thereto. In a preferred arrangement, there are two reactor chambers in series, one being formed within the exhaust manifold of the engine, and the other being mounted closely adjacent thereto.

Abstract: A process is described for oxidizing pretreatment of chromium (III) oxide containing films, resulting from corrosion of base metal surfaces of piping systems and the like, to render the corrosion films more amenable to conventional chemical cleaning treatments. The process uses a dilute aqueous solution of an iron (VI) salt (FeO.sub.4.sup.2-).

Abstract: An improved apparatus for transferring coins to a coin counting system, a coin selecting system or the like by way of a coin passage under centrifugal force caused by rotation of a rotary disc is disclosed. The improvement consists in that the rotary disc includes a first surface portion constituting an inside part thereof from which coins are displaced onto the coin passage one after another with a single line of arrangement maintained, a circular boundary wall defining the outer periphery of the first surface portion and having a height appreciably less than the thickness of the smallest coins to be transferred and a second surface portion extending outward of the circular boundary wall in the radial direction. A coin guiding member is disposed so as to allow the coins on the second surface portion to be displaced back onto the first surface portion while the rotary disc rotates.

Abstract: Conventional automatic drip coffee makers require about one minute of manual involvement to commence a brewing cycle.The automatic drip coffee maker herein disclosed makes a full decanter of coffee within 11/2-2 minutes following the one minute manual involvement.The automatic drip coffee maker of the present invention uses preheated water but only the amount required for a decanter of coffee (1/2 gallon) making it unnecessary to employ a large reservoir. The concept, in a preferred embodiment, is to commence the brewing cycle by an almost instantaneous dump of the preheated water to a transfer tank which, in turn, meters heated water to the grounds at such a rate as to insure almost immediate contact between all the coffee grounds and all the hot water. The dump time for preheated water from the preheated reservoir to the transfer tank is less than the time required to fill a receptacle with cold water.

Abstract: A device for inserting a myringotomy tube while permitting a twisting action to be imparted during the inserting step. A shaft of the device has a proximal and a distal end, and the proximal end is provided with a rotatable head which enables the deliberate rotation of the shaft. The distal end is adapted to releasably hold a myringotomy tube. A sleeve is provided and is adapted to movably hold a length of the shaft, while permitting the distal end of the shaft to be retracted into the sleeve. As the distal end is retracted into the sleeve, a pressure is exerted by the sleeve against a myringotomy tube held on the distal end, such that the tube is caused to be released from the distal end of the shaft. The invention also includes a provision for a handle fixedly attached to the sleeve and including a movable portion which can be caused to engage the rotatable head to move the head away from the sleeve, so that the distal end of the shaft is caused to be retracted into the sleeve.

Abstract: An electrochemical cell having dished electrodes received in rectangular frame members, and arranged to form a bipolar stack. Electrolyte inlets and outlets open into plenum chambers defined between the dished electrodes and the frame members. A turbulence promoter substantially fills the flowpath between the electrolyte inlet and electrolyte outlet.

Abstract: A surgical drape has a main sheet for draping over a patient's torso, a pair of leg flaps for draping over the patient's legs, and a liquid impervious sheet which has an opening for providing access to the patient.The leg flaps are connected to the main sheet and they extend laterally inwardly. Their forward and distal edges are movable so they may cover the legs of either a reclining patient whose knees are straight or a reclining patient whose knees are raised and bent in a lithotomy position.The liquid impervious sheet has its forward end connected to the main sheet. It has a second opening which provides a second access to the patient and a drain opening which permits the drainage of liquid. Removable liquid impervious coverings are provided over the latter two openings. To prevent liquid from flowing over the sides of the impervious sheet, its margins are provided with adhesive areas which are used to form tucks in the sheet.

Abstract: In a disc brake, the backing plate of the friction pads is guided and supported by the caliper outside of the brake disc, and both end portions of the backing plate is slidably supported by both end portions, arranged in the circumferential direction, of the ceiling surface which is provided on the caliper so as to mount over the brake disc. A piece extended from the central portion of the peripheral portion of backing plate is inserted into a groove formed in the central portion of the ceiling surface.

Abstract: A shutter operating system for a shutter hinged along a horizontal axis of an opening such as a fenestration in a wall includes cables attached to the free end of the shutter which are threaded through passages in the wall above the fenestration and to a horizontal counterweight member operating multiple cable pull points evenly through use of vertical equalizer brackets and restraint roller assemblies, assisted in operation by a hydraulic or pneumatic piston assembly, which opens and closes the shutter. The shutter operating system can also be operated manually without the assistance of the hydraulic or pneumatic piston assembly.

Abstract: A die casting system comprises a machine of the balanced, dual movement type wherein the part is cast and trimmed without any lateral movement. Both halves of the molds or dies are moved equal distances to and from the part plane. The machine incorporates a system of metal injection on the mold parting line with a runner-drain provision; provision for supporting the part at a plurality of points after the die opening; hydraulic fluid volumetric flow reduction; various nozzle configuration options and a heat transfer system for the dies. In addition, a part trimming machine is disclosed together with a cable transfer for moving the part from the casting machine to the trimming machine.

Abstract: A method of applying a descaling reagent comprising a one-electron reducing agent which is a low oxidation state transition metal ion in combination with a complexing agent to a surface to be treated to descale the surface which method comprises:(i) maintaining a low oxidation state transition metal ion either in solution under an inert atmosphere in a container made of or lined with an inert material or as a solid salt under an inert atmosphere;(ii) preparing a solution of the complexing agent and removing oxygen therefrom; and(iii) mixing the ingredients from steps (i) and (ii) either in situ in contact with the surface to be treated, or mixing the ingredients from steps (i) and (ii) prior to application to the surface to be treated under conditions whereby no substantial decomposition of the so-formed reagent occurs.

Abstract: A simple and quickly appliable bag closure device which automatically tightens the neck of the bag. According to a preferred embodiment of the invention the device comprises a label holder in the form of a generally flattened base and a cover for closure over the base. Said base and cover are provided with means permitting them to be sealed in the closed position by means of a security seal. The base is centrally formed with a cavity shaped to receive a lever which is a separate part of the label holder although connected thereto by a string fixed at one end to one of various points along the length of the lever and at the other end to a label. The lever is formed, with relation to the cavity, so that it may be pivoted about one end to apply an automatic tightening to the neck of the bag about which the lever is passed before being placed in the cavity. The closure of the cover over the base also closes the lever in the cavity.