Abstract: Training ammunition including a projectile disposed in a cartridge case, the projectile having a rear portion with an axially extending recess and a charge disposed therein, a cover cap extending over the rear of the projectile in a formfitting manner, and at least one obturation member disposed proximate to the cover cap, the cover cap having an outer diameter at least equal to and/or slightly greater than the caliber of the projectile.

Abstract: Process of preparing a not discolored p-nitrobenzoic acid by oxidation of p-nitrotoluene with oxygen, which comprises contacting the oxygen with the p-nitrotoluene in an acetic acid reaction medium and in the presence of a cobalt-containing and bromine-containing catalyst at a temperature of 80.degree. to 150.degree. C. The cobalt is present as a cobalt salt in the amount of 0.01 to 0.1 moles per mole of p-nitrotoluene, and the amount of acetic acid is 3 to 15 moles per mole p-nitrotoluene.

Abstract: A process for the preparation of a thermostable polyester which is insoluble in tetrachloroethane and consists of about 40 to 200 units, said polyester having units of the formula ##STR1## combined with units of the formula ##STR2## wherein Ph is ##STR3## AND BOTH R radicals are methyl on some units and both R radicals are phenyl on the balance of the units, said methyl units comprising 5-30 mole percent of the total R-containing units which comprises heating and condensing in the absence of a catalyst 4,4'-dihydroxytetraphenylmethane having a melting point of at least 295.degree. C together with 2,2-bis-(4-hydroxyphenyl)-propane and terephthalic or isophthalic acid dichloride until there is prepared said polyester which is insoluble in tetrachlorethane.

Abstract: An installation for reducing suction forces on a flat or slightly inclined roof structure including disturbing or interfering elements or baffles arranged in the zone of the roof corners. The disturbing or interfering elements or baffles may be provided with either vertically or horizontally extending bars or may include a plurality of perforations or holes disposed in a plate member. Furthermore, the disturbing element or baffle may have a bracket-like configuration or consist of a wind guiding device of a snowplow shape.

Abstract: Porous silicic acid having a specific surface of about 50 to 1000 m.sup.2 /g and having an anion content below the chemically determinable limit of detection is made by hydrolyzing methyl or ethyl silicate or polymethyl or polyethyl silicate with about 70 to 120% of the stoichiometric amount of water with moderate stirring.Hydrolysis activators such as acids or bases may be present as well as alcoholates of oxides of transition metals which then appear in the end product. Alcohol may also be present to facilitate hydrolysis.The products are characterized by marked purity and their specific surface can be closely and reproducibly controlled.

Abstract: A method of deacetylation of ethylene-vinyl acetate copolymers to produce the corresponding olefinicaly unsaturated, linear polymers. The ethylene-vinyl acetate copolymers are deacetylated under a vacuum of less than about 50 Torr, by splitting acetic acid from the copolymers, and while continuously stirring the copolymers.

Abstract: An apparatus for testing the strength and/or the leakproofness of seams or joints formed between synthetic resin sheets comprising a semicylindrical shell of transparent material having rounded closed-in portions and forming with its peripheral edges, sealing strip means surrounding said opening a continuous frame for engaging said strip means and a flexible closure means operatively associated with said frame for sealing off the opening whereby a test chamber is formed and pump means connected to said chamber for applying a vacuum thereto.

Abstract: An improvement in a process for the impregnation of masonry with an alcoholic or benzine solution of an alkyltrialkoxysilane or a partial condensation product thereof which improvement involves including in the alcoholic or benzine solution an organofunctional silane having a basic organo group or an alcoholate of silicon, a metal of an element selected from the group consisting of the First Main Group of the Periodic System, a metal of the Second Main Group of the Periodic System, a metal of the Fourth Sub-Group of the Periodic System, and a metal of the Fifth Sub-Group of the Periodic System; an improved composition for the impregnation of masonry comprising a mixture of an alkyltrialkoxysilane or a partial condensation product thereof and an organofunctional silane having a basic organo group or an alcoholate of an element selected from the group consisting of silicon, a metal of the First Main Group of the Periodic System, a metal of the Second Main Group, a metal of the Fourth Sub-Group of the Periodic S

Abstract: An improvement in a process for the preparation of thermoplastically workable fluoro-polyolefins and their copolymers wherein a fluorine containing olefin is polymerized or copolymerized in the aqueous phase in the presence of a water-soluble, radical-forming catalyst and a polymerization regulator, the improvement residing in employing as the polymerization regulator a halogenated hydrocarbon having from one to three carbon atoms and at least three halogen atoms of which at least one is a fluorine atom and at least one is a bromine or iodine atom.

Abstract: An apparatus for the continuous manufacture of phenolic resin foam in an endless sheet which includes means for mixing expandable liquid phenolic resin with a blowing agent and an acid-containing curing agent, optionally with the addition of additives, and means for processing the mixture in a temperature-controllable double belt press. The apparatus also comprises a device for cooling the phenolic resin to a temperature of from about 8 to about 15.degree. C.

Abstract: A process for preparing a chloromethyl-tetrachlorobenzene which comprises the steps of:A. contacting a xylene in a chlorine resistant solvent with 0.5 to 2, preferably 1 to 2 weight percent of FeCl.sub.3, based upon the weight of said xylene, at a temperature of 20 to 70.degree. C in the absence of light in a vessel having a vapor space over the level of the xylene solution.B. introducing into said vapor space chlorine and passing the same over said solution while strongly agitating the solution, said chlorine being introduced such that an excess pressure of 0.01 to 1 atmosphere exists over said solution;C. maintaining said solution at said temperature of 20 to 70.degree. C for a period of time at least 0.5 hours, preferably between 3 and 6 hours;D. thereafter directing energy-rich light at said vapor space while adding chlorine into said vapor space and maintaining the excess pressure over said solution at 0.01 to 1 atmosphere while maintaining the solution at a temperature of 50.degree. to 80.degree.

Abstract: A hollow container having two chambers separated by a diaphragm. A flowable explosive is carried in one chamber and an incompressible fluid is forced into the other chamber as needed, thereby flexing the diaphragm and forcing out the explosive into a dispensing hose. The dispensing hose includes a nozzle with a seal for placing the explosive in a bore hole. The explosive being dispensed can be accurately metered.

Abstract: A process for coagulating a fluoro-elastomer in an aqueous medium which comprises adding to an aqueous acidic medium thereof an organic base or salt thereof which acts as a vulcanization accelerator.

Abstract: A process for the purification of contaminated 1,1,1-trifluoro-2-chloro-2-bromoethane by reaction of the compound with organic amines, yielding 1,1,1-trifluoro-2-chloro-2-bromoethane of sufficient purity for use as an anaesthetic.

Abstract: A high energy explosive composition comprising an inorganic oxygen supplying salt, a metallic fuel and a eutectic mixture comprising an oxygen supplying salt and a combustible compound capable of lowering the solidification point of the oxygen supplying salt in admixture therewith in the eutectic composition; a eutectic composition comprising an oxygen supplying salt, a compound capable of reducing the solidification of said oxygen supplying salt and in admixtured therewith at least 30% by weight of a composition comprising an alkanolamine nitrate or perchlorate.

Abstract: A separating element comprises a body member for securing at least two parts together. The body member has an electrically ignitable separating charge disposed in tamped form within a recess therein, means operatively associated with the separating charge, which when a predetermined temperature has been reached, renders the explosive effect of the separating charge ineffective and ignition means for igniting the separating charge within said recess when separation of the parts is required.

Abstract: A synthetic resin composite sheet is made of a synthetic resin such as soft PVC, for sealing non-graveled, single-shell roofs or the like, and is provided with a flameproofing layer. The flameproofing layer is embedded within the synthetic resin.

Abstract: A process for the preparation of a vanadyl alcoholate which comprises contacting vanadium pentoxide with an alcohol in the presence of an orthoester of the formula R' . C(OR").sub. 3 wherein:R' is hydrogen, a straight-chained alkyl group of 1 to 5 carbon atoms or a branched chain alkyl group of 1 to 5 carbon atoms; andR" is a straight-chained alkyl group of 1 to 12 carbon atoms, a branched-chain alkyl group of 1 to 12 carbon atoms or phenyl.

Abstract: Vinyl fluoride having an impurities content of less than 100 parts per million; a method of preparing vinyl fluoride with an impurities content of less than 100 parts per million which comprises contacting gaseous vinyl fluoride with a finely divided copper containing catalyst composition at a temperature of between 0.degree. and 100.degree. C.; a polyvinyl fluoride organosol having an organosol viscosity, determined in a 40 wt.% suspension in propylene carbonate of 20 to 100 cP; a method of producing a polyvinyl fluoride which when suspended in a suspension in polypropylene carbonate in an amount of 40 wt.% has an organosol viscosity of about 20 to 100 cP. which comprises heating vinyl fluoride in an aqueous medium containing a water soluble azo initiator at a pressure less than 140 kp./cm.sup.2 at a temperature of 60.degree.-85.degree. C.

Abstract: A process for the preparation of a partial or complete trichlorosilane ester of the formulaH-Si(OR).sub.3-n Cl.sub.nwherein n is 0 or 1, R is an alkyl group of 1 to 11 carbon atoms, an alkyl group of 1 to 11 carbon atoms containing an oxygen atom in the chain, or an alkyl group of 1 to 11 carbon atoms containing a sulfur atom in the chain which comprises:1. Forming a partial esterification product by contacting a trichlorosilane with up to a 10% stoichiometric excess of a primary alcohol, the stoichiometric amount corresponding to only partial esterification of said trichlorosilane, said contacting being conducted only in the liquid phase without any contact in the vapor phase;2. Removing HCl formed from the reaction vessel;3. Thereafter contacting the partial esterification product with additional primary alcohol and removing liberated residual HCl from the reaction vessel.