Abstract: Thermoplastic plasticized polyvinylbutyral molding compositions, in particular films of improved tensile strength and reduced tackiness are prepared by acetalization of polyvinyl alcohol, capable of association, in the associated state with n-butyraldehyde in aqueous phase in the presence of an acid catalyst and, if appropriate, of an organic sulfonic acid having an emulsifying action, after-treatment of the polyvinylbutyral under acetalization conditions at an elevated temperature in the presence of an organic sulfonic acid having 8 to 30 C atoms and having an emulsifying action, isolation and/or purification of the polyvinylbutyral and, if appropriate, admixture of conventional additives and mixing of the product, which may have been dried, with up to 40% by weight of plasticizer, relative to the polymer/plasticizer mixture, and molding, the plasticizers employed being esters of phthalic acid with C.sub.6 -C.sub.10 -alcohols and/or esters of adipic acid with C.sub.6 -C.sub.10 -alcohols.
November 3, 1987
Date of Patent:
November 13, 1990
Hans Dieter Hermann, Kurt Fock, Klaus Fabian
Abstract: An apparatus is designed to rotate a vehicle by ninety degrees for repair of the under carriage of the vehicle and other parts accessible from the bottom. The preferred vehicle is a forklift, and a mast support is provided to be secured to the mast of the forklift. Wheel supports are provided which may be rotated out of engagement with the wheels when the vehicle is vertical to allow unobstructed access to the vehicle. Removable support bars may be used in place of the wheel supports to engage the bottom of the vehicle during rotation. The apparatus sits on a flat floor and does not require approach ramps or the like. The apparatus may be moved to any location and is symmetrical so that it may be placed against a wall on the left or right by a simple interchange of parts. A jib is provided which may be used to hoist heavy parts of the vehicle.
Abstract: A dipstick handle of the invention includes a unitarily molded handle, such as a finger ring, having an integrally molded hollow shaft. The shaft has one or two pairs of opposed slots through its outside surface. A dipstick blade is received by one end of a hollow insert which has two pairs of tabs at its other end for snapping into the slots through the surface of the shaft. Pressure on the tabs engaged in the slots releases the tabs and enables the insert and dipstick blade to be withdrawn. The handle seals the tube into which the dipstick is fitted to avoid escape of noxious gases. The blade may be oriented in any of four directions with respect to a plane of the handle.
Abstract: A method of electro-hydraulic control of the cutting and self-advancing mine-roof support units in an automated longwall is carried out in dependence on the measured lengths to which the rams pushing the support are extended, with extraction by the cutter occurring in long cuts extending over almost the entire length of the longwall. After each extraction cut, the conveyor is advanced by an amount equal to the depth to which the cutter has cut, and the process of advancing each group is triggered in dependence on the length to which the pushing rams have been extended. The self-advancing roof-support units inserted in the longwall are divided into groups which, depending on the respective state of operation, are moved forward individually and successively, in each case by a preset extension length of the pushing rams.
August 11, 1989
Date of Patent:
October 23, 1990
Herman Hemscheidt Maschinenfrabrik GmbH & Co.
Abstract: A modular chimney unit includes a plurality of courses of joined bricks forming a closed shape and having a channel therethrough for receiving a section of chimney flue liner. Modular units of the invention are stacked vertically and joined, with the channels in vertical alignment, until the required chimney height is reached. A method of constructing a chimney using modular units is also described.
Abstract: A lens lapping pad comprising a zinc alloy foil having a thickness of about 0.1 mm, and a backing of cloth impregnated with a pressure sensitive adhesive, to give an overall pad thickness of about 0.5 mm. A peelable cover may protect the cloth backing.
Abstract: A purified common antigen for colorectal and mucinous ovarian cancer (COTA) is provided which is antigenically distinct from CSAp, CEA and Ca 19-9. The COTA antigen is useful for producing a COTA antibody which is nonreactive with CSAp, CEA or Ca 19-9.
Abstract: A pulse combustion device adapted for use in a liquid heating apparatus. The combustion device includes a combustion chamber having a forward end wall formed with an inlet port to be supplied with a mixture of gaseous fuel and air, an attachment plate unitedly provided with the forward end wall of the combustion chamber for engagement with a liquid vessel of the heating apparatus, a cylindrical decoupler arranged coaxially with the combustion chamber at its rear side, a plurality of tailpipes connected at their one ends to the combustion chamber and at their other ends to a front end of the decoupler, the tailpipes being arranged at their intermediate portions in parallel along the outer circumference of the decoupler, and an exhaust pipe connected at its one end to a rear portion of the decoupler and being extended forwardly along the circumference of the decoupler, said exhaust pipe being further extended forwardly through the attachment plate.
Abstract: As for high strength stainless steels and method for manufacturing the high strength stainless steels, the strength of the stainless steels are enhanced by adding an appropriate amount of both nitrogen and niobium to austenitic stainless steels, inhibiting boron, an impure element, and decreasing the carbon content. The strength of the stainless steels are further enhanced by such heat treatment as control rolling and low temperature solution heat treatment applied to the stainless steels after the control rolling.
Abstract: A method and apparatus for removing and/or modifying specific target substances in the blood is disclosed. The invention includes a column or chamber in which selected bioreactant molecules are suitably retained for reaction within a porous hydrogel polymer matrix by reversibly quenching the reactant propensity with a displaceable surrogate and polymerizing an insoluble cross-linked hydrogel in such manner that the hydrogel polymer replicates the shape of the bioreactant molecule. This replicated phantom shape in the polymer then exhibits profound dispersion-force affinity for the bioreactant. The invention provides for retention of a wide variety of therapeutic reactants and reaction products while confining the reaction within the column.
Abstract: A gas cooking appliance for cooking chow mein, pan cakes or the like on a hot plate mounted thereon, which cooking appliance includes a pulse combustion burner installed within as internal compartment of the appliance and having a combustion chamber coupled with a bottom portion of the hot plate to take place pulse combustion of a mixture of gaseous fuel and air supplied thereinto, wherein the hot plate is in the form of a thick metallic plate formed therein with a tailpipe passage which is connected at one end thereof to an exhaust port of the combustion chamber and extends outwardly through the metallic plate to permit the flow of combustion products discharged therethrough from said combustion chamber.
Abstract: A high strength non-magnetic stainless steel comprising by weight ratio, less than 0.20 % C, less than 1.00 % Si, 14-16 % Mn, less than 0.005 % S, 0.2-1.0 % Ni, 15-19 % Cr, 0.30-0.40 % N, and Fe and other impurity elements, of which C+N constitutes 0.40-0.55 % and the Mn equivalent equals 30-33. The stainless steel has a hardness more than Hv 500, a magnetic permeability less than 1.01 after drawing, the steel may be suitably used as the steel for the micro shafts of video tape recorders and electromagnetic valves.
Abstract: A pulse combustion unit for a liquid heating apparatus having a liquid vessel arranged to store an amount of liquid to be heated. The combustion unit includes a base plate mounted on the upper portion of an upright support structure, a pulse combustion burner assembly including a pulse combustion chamber secured to one surface of the base plate and a curved tailpipe having an inner end connected to an exhaust port of the combustion chamber and an outer end connected to the base plate, and an air-fuel mixer head secured to the other surface of the base plate and being in open communication with the interior of the combustion chamber through an opening of the base plate. The liquid vessel is coupled at its side wall with the base plate in such manner that the combustion chamber and tailpipe are arranged in the vessel.
Abstract: An electrode water boiler, preferably for the humidification of air, comprising a boiler having two or more electrodes connected to an electrical supply source between which current flows through the water in order to heat the water, the boiler also having a steam outlet, a valve for feeding water into the boiler, a valve for discharging water from the boiler, a sensor for sensing the current in one or more electrodes, and control means responsive to the sensed electrode current arranged to initiate the feed water valve when the electrode current is below a predetermined lower value and to initiate the water discharge valve after the electrode current has risen above a predetermined higher value and, following the initiation of the feed water valve and the electrode current subsequently rising to a predetermined intermediate value between the said lower and higher values, to effect the introduction, into the boiler, of a fixed measured quantity of feed water.
Abstract: A liquid heating apparatus of the type which includes a liquid vessel assembled within a support frame, a pulse combustion burner mounted to the vessel and having a combustion chamber secured at its inlet end to a side wall of the vessel and immersed in liquid in the vessel, a tailpipe connected at its one end to an exhaust port of the combustion chamber and being extended outwardly through the vessel, and an exhaust muffler assembly connected to an exhaust end of the tailpipe. The exhaust muffler assembly includes a plurality of mufflers connected in series to the exhaust end of the tailpipe, a final one of the mufflers being in the form of a resonance type muffler for reducing low frequency noises caused by pulse combustion in the combustion chamber. The final one of the mufflers is detachably mounted in place at the outside of the support frame for easy replacement with another resonance type muffler and connected to the preceding muffler in a disengageable manner.
Abstract: A device for discouraging small domestic or wild animals from frequenting areas where they may become a nuisance. The device comprises a mat made of non-conductive material to be spread over the area. A plurality of conductive surfaces are spaced on the upper surface of the mat so that adjacent conductive surfaces are electrically insulated from each other. An electric control is associated with the conductive surfaces and provides electric power thereto so that when an animal walks on the mat its body completes a circuit between live and ground areas on the mat and the animal is thereby provided with an unpleasant electrical sensation.
Abstract: A crystallized aromatic polycarbonate having a weight average molecular weight of from 6,000 to 200,000 and having a terminal hydroxyl group content of not greater than 0.03% by weight based on the weight of the polycarbonate is effectively produced by first heating a mixture of a dihydroxydiaryl compound comprising at least 85 mole % of a dihydroxydiaryl alkane with a diaryl carbonate to prepare a prepolymer having a weight average molecular weight of from 2,000 to 20,000 and having terminal aryl carbonate groups in an amount of greater than 50 mole %, based on the total number of moles of all the terminal groups of the prepolymer, secondly crystallizing the prepolymer and finally subjecting the crystallized prepolymer to solid-state polymerization. The crystallized aromatic polycarbonate does not contain impurities, is colorless and has excellent properties such as resistance to heat and to boiling water. Therefore, the polycarbonate is advantageously used as engineering plastics.
Abstract: A pulse combustion fat fryer of the table type includes a box-type cabinet having a front compartment and an upright rear compartment, an open-top vessel assembled within the front compartment to store an amount of cooking oil, the vessel having a front wall and a bottom wall the front part of which is located adjacent a bottom plate of the cabinet and the rear part of which is spaced upward from the bottom plate, a pulse combustion burner having a combustion chamber secured at its inlet end to the front wall of the vessel and immersed in the liquid in the vessel, a tailpipe connected at one end thereof to an exhaust port of the combustion chamber and being extended outwardly from the vessel, an air intake muffler and an exhaust muffler vertically disposed in parallel within the upright rear compartment of the cabinet, an air chamber casing secured to the front wall of the vessel and being connected to the air intake muffler to be supplied with fresh air, an exhaust decoupler located just below the rear part