Abstract: Injection molding process for polyamide composition and shaped articles produced therefrom wherein the polymer is the condensation product of a terephthalyl moiety and a 2,4,4- or 2,2,4-trimethylhexamethylenediamine-1,6 which polymer has a viscosity number of 120 to 180, preferably 125 to 140, as measured according to DIN 53,727.

Abstract: A process for joining abutting thermoplastic synthetic resin foam structures by a strip which covers a junction zone formed between the foam structures including the steps of pressing a metal strip heated to above the softening point and or the melting temperature of the synthetic resin foam under slight pressure onto the junction zone and then allowing the metal strip to cool. In this manner, a bond is formed between the foam structures and the metal strip.

Abstract: In the production of sodium aluminum hydride by reaction of an aluminum chloride etherate with sodium hydride in an inert liquid dispersing agent, the improvement which comprises using as said sodium hydride reagent coarse-grained sodium hydride which is first ground in said dispersing agent to a particle size less than about 12 microns; preferably the inert dispersible agent is tetrahydrofurane or a lower alkyl ether of a lower alkylene glycol, whereupon the resulting sodium aluminum hydride dissolves in the reaction medium.

Abstract: A thermally conductive refractory electrical insulating embedding composition comprising granular magnesium oxide and granular fused magnesium iron alumino silicate; and electrical heating assembly having an electrically conductive heating member and a jacket and disposed between said member and said jacket a thermally conductive refractory electrically insulating embedding composition comprising granular magnesium oxide and granular fused magnesium iron alumino silicate.

Abstract: A stabilized 1,1,1-trichloroethane composition containing, as stabilizer therefor, a mixture consisting of a nitrile, 1,4-dioxane, and nitromethane.

Abstract: A process for the production of multiple-layer sheets, panels, shaped articles, or the like laminates having at least one layer of polyurethane foam material wherein at least one side of the polyurethane foam layer is bonded under the action of heat to a layer of cross-linked polyethylene foam material.

Abstract: A copolymer of vinyl chloride with ethylene or propylene having a K-value of 45 to 65 and an alkylene (ethylene or propylene) content of 0.5 to 10 weight percent. This product is particularly useful for forming plasticizer-free coatings on substrates by known fluidized bed coating processes and for forming plastizer-free shaped articles by rotational molding processes.

Abstract: The use of certain chloroplatinic complex compounds of the formula:[Pt R.sup.1 Cl.sub.2 ].sub.awherein a is 1 or 2 and R.sup.1 is an unsaturated ketone residue, to catalyze the addition of alkoxy, aryloxy or halo hydrogen silanes to aliphatically unsaturated compounds (carbon to carbon unsaturation such as olefins and/or acetylenes).

Abstract: Practice device for mortars having a central tube for receiving a subcaliber training ammunition. A locking member is firmly and detachably connected at the rear end of the tube and receives and mounts the subcaliber training ammunition therein. The tube also is arranged to receive thereabout an annular member having a lateral dimension corresponding to a predetermined mortar caliber and a nut member which is secured to the front end with the annular member being positioned between the nut member and the locking member whereby the practice device may be fired from a mortar barrel of the predetermined caliber and may be reused.

Abstract: Warhead for bombs, projectiles, rockets and the like having a casing with several projectiles accommodated therein. The projectiles are disposed in launcher tubes which are connected with each other by a common central connecting component to form an independent unit in a symmetrical arrangement with respect to the axis of the component. The independent unit is equipped with a descent-retarding device on one side thereof positioned toward one direction of the axis, while the other side is provided with a stabilizing device toward the other direction of the axis to vertically position the axis during descent. Preferred embodiments use parachutes as descent-retarding devices and rigid stabilizer rods or flexible members to interconnect a stabilizing weight with the respective independent units. Accommodations are made to telescope the stabilizer rods into one another to limit the total space utilized in the stored position.

Abstract: A stabilized hydrolyzed silicic acid ester composition comprising a hydrolyzed silicic acid ester in which is dissolved a stabilizer selected from the group consisting of cyclic ethers, ether alcohols, carboxylic acid esters and ketones.

Abstract: In a process for the manufacture of a polyimide from a polyamide carboxylic acid solution by cyclodehydration of the polyamide carboxylic acid, the improvement which comprises carrying out said cyclodehydration in the presence of a nitrogen containing compound selected from the group consisting of quinoline, isoquinoline, mono-substituted alkyl pyridines, dialkyl substituted pyridines, mono-substituted alkyl quinolines, dialkyl substituted quinolines, monoaralkyl substituted quinolines, diaralkyl substituted quinolines, monoalkyl substituted isoquinolines, dialkyl substituted isoquinolines, monoaralkyl substituted isoquinolines, diaralkyl substituted isoquinolines and mixtures thereof.

Abstract: An arrangement of profile members for sash windows, sliding doors and the like which includes interconnected blind frame profile members of similar cross-section along the length thereof connected to one another to form a blind frame. Sash frames are also formed by constant cross-section sash frame profile members interconnected to one another. To accommodate a simple attachment and detachment of a sash frame to a blind frame, a V-shaped elastic mounting profile element is provided which snap-fittingly attaches to the blind frame and guidingly accommodates the sash frame. This elastic profile mounting element is provided along three sides of the frame construction with the other side including a T-shaped aluminum guide rail for accommodating sash rollers or the like.

Abstract: A process for preparing an alkylalkoxysilane containing polysulfide bridges which silane has the formula:(RO).sub.3.sub.-m R.sub.m Si--Z--S.sub.2.sub.+x --Z--SiR.sub.m (OR).sub.3.sub.-m,wherein R represents identical or different linear or branched alkyl radicals having 1 to 6 carbon atoms or phenyl, Z represents linear or branched alkylene radicals having 1 to 8 carbon atoms, m is 0 to 3 and x is 1 to 4, which comprises contacting a bis-alkyl-alkoxysilyldisulfide of the formula:(RO).sub.3.sub.-m R.sub.m Si--Z--S--S--Z--SiR.sub.m (OR).sub.3.sub.-mwherein R, Z and m have the previously assigned significance, with sulfur at a temperature between 100.degree. and 200.degree.C.

Abstract: Ejection head for projectiles, rockets or the like having at least one ejection section including a carrier plate, a plurality of ejection tubes for containing active elements mounted annularly about the carrier plate, a descent controller connected to the carrier plate wherein the tubes are movable from a folded position to a spread-apart position for discharging the active elements contained therein. A locking device is provided for locking the tubes in the folded position and a spreading device is provided for spreading the tubes apart with a pyrotechnical element being provided for generating compressed gas for triggering the locking device to unlock the ejection tubes and causing the spreading device to spread the ejection tube apart.

Abstract: L(+)- or D(-)-.alpha.-azidophenylacetic acid is produced by a process which involves the steps of reacting a water-soluble salt of DL-.alpha.-azidophenylacetic acid with a water-soluble salt of an optically active .alpha.-phenylethylamine in an aqueous medium, effecting crystallization of the resulting reaction product, that is, the diastereomeric salt, and splitting of the thus-obtained salt.

Abstract: An electric fuze, especially for hand grenades, having a power source which is activatable by the effect of a force for supplying output power and a delay unit for delaying the ignition of a primer with respect to the time of activation of the power source. The delay unit has a variable time constant and includes an RC circuit formed of a plurality of series or parallel connected resistors and/or capacitors which are functionally connected with one another by electrical leads which leads are arranged to be open-circuited for the purpose of changing the delay time in a predetermined manner.

Abstract: A process for welding explosive-clad metal sheets together with one another and/or with metal pipes, connecting elements, or the like, includes producing at least one unjoined zone between the base metal and the cladding metal in a defined manner during an explosive cladding step, and thereafter welding in the region of at least one of unjoined zones.

Abstract: A draw pulling pallet and method of making same, wherein the pallet is constructed of a thin flexible sheet of resinous material, preferably thermoplastic synthetic resinous material, which has been roughened on one side to prevent slippage of cargo therefrom. In preferred embodiments, the side of the sheet is roughened by longitudinally extending grooves and/or rhomboid pattern grooves. Preferred embodiments also include markings indicating the direction which the pallet is to be pulled. In one preferred embodiment, these markings are in the form of arrow shaped embossments and in other preferred embodiments, these markings are in the form of longitudinally extending colored embossments adjacent one side of the pallet. Preferred embodiments of the pallets also include perforations for accommodating drainage of water therefrom.

Abstract: A process and apparatus for continuous production of molded sheets of a foamed thermoplastic synthetic resin, wherein a synthetic resin is fed into a screw extruder and a low boiling point liquid expanding agent is introduced under high pressure into the extruder and admixed with the resin in the extruder and thereafter the resulting admixture is extruded in the form of a plurality of foam filaments to insure proper distribution of the admixture to the nozzles of the extruder. A gear pump is provided for each nozzle. Also, to avoid collapsing of the foam means are provided for tempering the foam filaments by the application of heat.