The non-flammable rigid foam e.g. used as a building material complies with the requirements of DIN 4102 and which provides a non-toxicity of the combustion fumes according to DIN 53436. It has a mass ratio of resin component:filler of at least 1:2,5 and a bulk density amounting to 50 kg/m3 to 450 kg/m3. The resin component is formed by reaction of 50-62 mass parts resolic resin, 0-15 mass parts f...

The invention relates to a method wherein uncured urethane formulations are bonded to a cured rubber or synthetic rubber substrate in such a manner so as to provide greater bonding strength than has been achieved previously in urethane formulation bonding to rubber or synthetic rubber. The substrate is cleaned, a coating of a cyanoacrylate adhesive is applied, followed by a liquid or paste urethan...

The repair of a reinforced elastomer article (10) having a hollow (12) therein relates to utilizing an amine curable polymer or prepolymer and a cured elastomer patch. The hollow (12) in the elastomer as well as the areas juxtaposition to the patch (20) is coated with a treating agent (30). The amine curable polymer or prepolymer (40) which may have rubber particles therein is then applied to the ...

A process and composition for applying and bonding an amine curable polymer or prepolymer at ambient temperatures to the surface of a cured elastomer substrate. The elastomer article or substrate is treated with an organic oxidant such as an N-halohydantoin, N-haloamide, or an N-haloimide, for example, the various isomers of mono-, di-, and trichloroisocyanuric acid. A polyisocyanate is applied th...

A fluid pressure operated disc brake having one brake disc affixed to the housing of a brake cylinder unit and the other disc affixed to a service brake piston of the brake cylinder unit, which further includes an auxiliary brake piston between the service brake piston and cylinder head, thereby forming on opposite sides thereof a service brake actuating chamber and an auxiliary brake actuating ch...

Resilient polyester foam materials. Acyl halide, polyol, and polyhydroxy cross-linking agent are reacted in the presence of alkali metal carbonate to prepare the resilient polyester foams. A process similar to that used in the one-shot preparation of polyurethane foams is used. Preferred reactants are adipyl chloride, quadrafunctional polyol based on pentaerythritol, propoxylated pentaerythritol c...

- A process for economically recovering metal values, especially precious metal values, from waste waters comprising a mixture of natural surface water, industrial waste water and organic waste, where the metal values appear in concentrations below levels previously commercially of interest, including the steps of concentrating the metal values of the waste waters by bacterial treatment thereof to...

An actuator mechanism for a brake having a plurality of friction disc compressed between a pressure plate and a backing plate. The actuator mechanism has a piston located in a bore of a housing. A pin fixed to the housing extends through and locates the piston in the bore. A first tube made of an insulator material is located in the bore between the piston and the pressure plate. A second tube con...

In a well testing tool system for isolating vertically spaced portions of a well bore and measuring well conditions such as pressure, and temperature, and including a wireline supported tool train and a locking sub connectible on a removable lock mandrel for releasably locking the tool train in a well bore, the tool train has a locking probe releasably connectible in the locking sub, a probe mandr...

The invention relates to a hydraulic brake booster device for passenger vehicles which can be adapted for the handicapped using minimal means. The hydraulic brake booster device comprises a hydraulic booster, provided with a transmission piston which can be loaded with oil under pressure by means of a control slide valve. The control slide valve is displaceable by means of a brake actuating cylind...

Procédé pour la fixation et la rectification, notamment le finissage, d'un arbre lequel est placé dans une fixation de pièce où il repose sur au moins deux points d'appui et où il est relié à un système d'entraînement pour l'usinage. Au moins une meule peut être amenée au contact avec l'arbre tournant en dehors des points d'appui. Aux points d'appui, l'arbre 3 est entouré respectivement par deu...

Process for the manufacture of an artificial stone which has the external aesthetic characteristics of a natural stone such as granite. The process according to the invention consists in manufacturing moulds from a silicone resin whose shape varies as a function of the utilisation, fireplaces, funerary monuments, building stones into which is poured a mixture whose characteristic components are th...

L'invention concerne une méthode et un appareillage de détection des fractures par échographie ultra-sonique le long de la paroi d'un matériau ou d'une formation.
La méthode proposée comporte l'émission et la réception d'un faisceau de faible angle d'ouverture de signaux ultra-soniques ayant une direction de propagation perpendiculaire à la paroi, ces signaux traversant une faible épaisse...

This invention discloses an instrument package 20 for a drilling a unit which gathers the information from a pitch sensing device 52, a roll sensing device 53, and a 3-position magnetometer 51 along with a gamma counter 50, and converts the information to a multiplexed signal which is subsequently used to frequency modulate a pulse train. The pulse train is then transmitted down a long cable to a ...

A polypropylene film which is useful for electrical devices is produced by biaxially stretching an unstretched polypropylene molded article having, on at least one side, a surface layer having beta -form crystals, of mean diameter over 7 mu m, under such conditions that the stretching temperature at the stretch initiation point is in the range of 145 DEG to 176 DEG C., and the stretch ratio in...

The invention relates to a sound-damping element (1), in the outer layers (3, 5) of which U-profiles (6-11) are inserted. The U-profiles (6-11), preferably made of steel, increase the sound-damping value of the element from 39 dB to 44 dB. Gluing the U-profiles (6-11) into the outer layers (3, 5) of the element moreover ensures better rigidity of the element (1).

PCT No. PCT/CH80/00108 Sec. 371 Date May 29, 1981 Sec. 102(e) Date May 29, 1981 PCT Filed Sep. 18, 1980 PCT Pub. No. WO81/00967 PCT Pub. Date Apr. 16, 1981.A bench type exerciser device has a pad (6) which is swivel-mounted on a rotatably mounted lever (5). This lever (5) is swingably connected, via a connecting member (17), to one end of an arcuate lever arm (13), the other end of which is hinged...

The advancement device for the longitudinal and vertical advancement of a grinding machine contains an advancement drive (1) which comprises a drive device (4) coupled to the reciprocating table (5) of the machine tool, and a changeover switch (6) and is intended for the relative longitudinal displacement of a grinding wheel (2) and a workpiece (3). The changeover-switching input (7) of the change...

For the coating of plastics with polyvinylidene fluoride, finely divided polyvinylidene fluoride is dispersed in a solvent mixture of (a) at least one high-boiling, organic solvent with a boiling point up to 250 DEG C., which dissolves polyvinylidene fluoride little or not at all, and (b) at least one strongly polar latent organic solvent for polyvinylidene fluoride, the dispersion obtained is di...

L'invention concerne une installation à rayons X pour l'examen radiologique de sujets.
Elle comporte une source X de rayons X qui émet un faisceau B passant par la position P d'un patient, vers un récepteur R. Ce faisceau est transmis par des fenêtres allongées W1, W2 de masques mobiles coordonnés D1, D2 disposés respectivement entre le tube à rayons X et le patient, et entre ce dernier e...