Abstract: A method and apparatus is provided for separating tar from gases leaking from the oven door of a coke oven. At least one gas extraction device is located at a point of leakage and is connected through a collection duct to an extractor fan for sucking the gases from the door. A means is provided for spraying hot ammonia liquor into the upstream portion of the collection duct and a means is provided for introducing saturated steam into the duct downstream of the ammonia spraying means.

Abstract: The charge accepting capacity of electrographic dielectric coatings is improved by dispersing in an organic solvent-soluble thermoplastic insulating resin having carboxyl functionality providing an acid value of from 5-100, from 0.05-3% by weight of calcium oxide or calcium hydroxide.

Abstract: A viscosity stable, stainable, wood textured aqueous latex caulking composition is disclosed in which wood particles have sorbed therein, water immiscible organic solvent providing a free-flowing, solvent-wet powder. An aqueous emulsion of film-forming resin particles is mixed in and an oily plasticizer for the resin particles is added to provide a T.sub.g below about -40.degree. C. unless the resin particles are internally plasticized. The proportion of wood particles, the solids content of the aqueous emulsion and the proportion of oily plasticizer or other thickener provides a viscous mass of gunable viscosity.

Abstract: A liquid developer for developing electrostatic images comprises a dispersion in aliphatic hydrocarbon solvent of particles of imaging material, binder and polymeric carbamate having a linear carbon backbone and carbamate side chains in which the carbamate groups contain at least one alkyl group having at least 5 carbon atoms carried by the nitrogen atom thereof, the binder and the polymeric carbamate are soluble in the hydrocarbon solvent when hot and insoluble in said hydrocarbon solvent at room temperature so as to be present in coprecipitated form in the developer.

Abstract: Printed wood paneling having a reduced flame spread rating is provided by embossing the wood surface to be finished to depress in a relatively uniform pattern of depressed portions at least about 20% up to about 70% of the surface area of the wood to a depth of at least about 0.01 inch, and these depressed portions are then filled with an intumescent fire retardant filler and the excess filler is substantially removed from the undepressed portions of the wood surface. The embossed panel with the depressed portions thereof filled with intumescent fire retardant filler is then finished in conventional fashion by applying a filler, sanding, base coating, printing, and usually embossing. A clear topcoat is then applied to protect the finish.

Abstract: Cationic amine functional copolymers which are stably dispersible in water with the aid of water miscible organic solvent, and which cure to provide superior detergent and corrosion resistance are provided by forming a solution copolymer of monoethylenically unsaturated monomers including from 3% to 35% of monomer having a basic amino groups and from 35% to 50% of isobutoxymethyl acrylamide or methacrylamide, the copolymer being neutralized up to about 90% with a solubilizing acid to render the copolymer cationic and dispersible in water.

Abstract: A locomotive is provided to move a quench car and a gas transition car parallel to a battery of coke ovens adjacent a coke guide car. A pivotable hood is provided on the guide car for covering part of the charging opening of the quench car. The quench car has generally parallel, pivotal flaps which can operate independently to open a portion of the quench car charge opening beneath the hood as coke is pushed from the guide and through the hood into the car. The flaps on either side of the hood can be held closed to seal the charge opening and prevent escape of the dirty gases out of the quench car. An extraction duct connects the quench car to the gas transition car cooperably connected with a gas collection duct which also runs parallel to the coke ovens and which has an opening running its length.

Abstract: A motion translation apparatus and method is provided which is particularly suitable for use with machine tools wherein the workpiece is moved relative to a tool. A stationary guideway member having a track of ball bearings mounted partially projecting from a V-shaped channel is fixed relative to the tool and relative to a rotatably driven turntable on which a hydraulic fluid operated actuator is pivotably mounted at one end. The piston of the actuator is pivotably secured to a link member which is in turn pivotably mounted on one end to the turntable. The free end of the link member opposite the end pivotably mounted to the turntable is pivotably connected to a movable guideway member which has a V-shaped channel adapted to receive and engage projecting portions of the ball bearings in the stationary guideway member for a predetermined arc of rotation of the turntable.

Abstract: After curing pig skins with hydrochloric acid, they are ground and then homogenized to a gel. The gel is extruded into a coagulating and tanning bath containing glutaraldehyde in a saturated sodium chloride solution to obtain a coagulated and tanned casing which is thereafter passed into a plasticizing bath containing glycerol and an oxidizing agent.

Abstract: A hood car having a hood, a coke guide, a coke guide car, and a quench train are all provided for movement parallel to a battery of chamber coke ovens between a quench plant and the ovens. The hood car hood has an opening reaching over the loading area of the quench train and is adapted to be connected through extraction ducts to a gas transition device which is movable on a stationary collection duct alongside the coke oven battery and which has an opening at the top. The opening can be sealed by a flexible cover belt which can be lifted off by the gas transition device. The collection duct is connected to a stationary extraction and purifying device which purifies the dirty gases. The movable hood car and the quench train have coupling means, functional in both directions of movement, for coupling together the hood car and the quench train. The hood car has a brake means for automatically stopping the car upon being uncoupled from the quench train.

Abstract: A dental instrument for preparing a tooth for receiving a crown in an area not visible to the dentist which includes a guide member disposed adjacent to the cutting instrument and is freely rotatable relative to the cutting instrument. The guide surrounds the cutting instrument and includes at its lower end a shield that prevents the cutting instrument from contacting the surrounding gum. The guide limits the horizontal depth of cut and vertical depth of cut into the tooth during the tooth preparation.

Abstract: The preparation of water dispersible amine-functional copolymers is disclosed in which a mixture of ethylenically unsaturated material including amine-functional monomer is slowly added to a heated heel of water miscible organic solvent containing a solubilizing acid in an amount to neutralize from 25% to 90% of the amine functionality in the copolymer, but insufficient to provide a pH below 5 when the copolymer is dispersed in aqueous medium.

Abstract: A process is provided for the opening of envelopes made of cellulosic paper in which there is applied to at least one envelope edge as the sole reactant with the cellulose therein a non-noxious organic acid having at least one pK value at room temperature between about 1.5 and about 5, followed by the application of heat and mild mechanical action to the envelope edge.

Abstract: Rovings impregnated with a semi solid mixture of thermosetting resin and thermoplastic resin and which can be handled in textile processing equipment are provided by overcoating the impregnated roving with a thermoplastic encapsulating resin to form an encapsulating membrane of thermoplastic resin around the impregnated roving which provides the strength, flexibility, and surface properties needed for textile handling. The thermosetting resin is preferably an epoxy-resin dicyan-diamide combination and it is preferably used in admixture with a polysulfone resin.

Abstract: Methods are disclosed for the production of a water dispersible solution of acidic copolymer in water soluble polyol with controlled limited reaction between the copolymer and the polyol. This method comprises copolymerizing monoethylenically unsaturated monomers including a proportion of carboxyl-functional monomer providing dispersibility in water with the aid of a base and from 0.5%-5%, based on the total weight of monomers, of a monoethylenically unsaturated monomer carrying a reactive group selected from dicarboxylic acid anhdyride functionality and N-methylol functionality, the copolymerization being carried out in solution in a water soluble polyol. This copolymerization is preceded by or carried out under conditions causing substantially complete reaction between the anhydride or the N-methylol functionality in the reactive monomer, and the hydroxy groups in the polyol. Aqueous coating compositions are provided by dispersing the copolymer solution in water with the aid of a volatile base.

Abstract: Seals for the edge of a pivoted blade are provided in which an elongated strip of rigid material of U-shaped cross-section having side walls the interior of at least one of which carries resilient teeth pointed toward the closed portion of the U, and the open end of the U is narrowed to enhance the grip of the seal on the edge of a blade. The preferred sealing expedient employs a flap which extends to one side of the strip and which is dimensioned so that it does not reach the free end of the adjacent side wall. In one form of the seal, the side wall opposite the flap is extended to lock with a bend on the edge of the blade. In a damper, the seal is mounted on the edge remote from the air flow into the damper so that the flap is biased against the adjoining blade and the air pressure serves to strengthen the seal.

Abstract: A method of forming a chlorine tablet for combatting bacterial and algaecidal contamination of swimming pools and the like, which includes the step of pressing a mixture of calcium hypochlorite and chloride of lime, together with a minor proportion of zinc stearate as a tabletting lubricant, into a tablet. The invention further relates to such a tablet.

Abstract: Coatings of increased strength and reduced tackiness are anodically electrodeposited on metal sheets, and particularly alkali-cleaned aluminum sheets, by passing a unidirectional electrical current through an aqueous bath having dispersed therein carboxyl-functional copolymer particles and heat-hardening formaldehyde condensate for curing the same, and then through the metal sheet as anode to deposit a coating, and especially a clear coating, on the metal sheet. The copolymer particles are provided by copolymerization in the presence of free radical polymerization catalyst of monoethylenic carboxylic acid in an aqueous dispersion of the monomers in a liquid mixture containing at least 0.5% by weight of polyhydric alcohol having a molecular weight in the range of about 300 to about 6000, the copolymerization providing copolymer particles having an average molecular weight in the range of 10,000 to 50,000 and an acid value of 3-200.