In a laser surgical apparatus having a laser oscillator operable to oscillate to produce a laser beam, and an optical path connected to the laser oscillator for transmission of the laser beam, a hand piece at the fore end of the optical path is equipped with a vibrator element comprised of a piezoelectric transducer, and the vibrator element applies a vibration to the hand piece.

A ski safety binding has a sole clamp 14, preferably formed as two sole clamp halves 14', 14'', which is pressed by spring force against first and second abutment surfaces 12 provided on the binding housing 24 on respective sides of the central longitudinal axis 11. The first and second abutment surfaces 12 extend, at least in part, obliquely outwardly in the direction towards the ski boot in such...

Certain phenazine leucodyes are useful in electrochromic recording systems.

An aqueous copolyester dispersion suitable for the subbing of polyester film without use of organic solvents wherein the copolyester contains recurring ester groups derived from ethylene glycol and an acid mixture essentially consisting of 20 to 60 mole % of isophthalic acid, 6 to 10 mole % of sulphoisophthalic acid whose sulfo group is in salt from, 0.05 to 1 mole % of an aromatic polycarboxylic ...

The invention relates to a process for the manufacture of highly resilient, cold-curing polyurethane foams with the distinctive feature that polysiloxane-polyoxyalkylene block copolymers with the following characteristics are used as foam stabilizers: (a) the polysiloxane block is linear or branched and contains an average of 4 to 25 silicon atoms, wherein the organic radicals linked to the silico...

An electrical braking control circuit for use in a control system for a direct current traction motor which may be employed, for example, to propel an electrically driven vehicle. The electrical braking controller of the invention initiates electrical braking in a plug mode of braking and then, when conditions are suitable for regenerative braking, causes a transition to regenerative braking, foll...

A process is provided for mechanically surface-finishing a textile fabric which comprises ccontinuously feeding said fabric from a source of supply, such that said fabric lies in a single plane, subjecting successive adjacent sections of the fabric to intermittent mechanical impact with an abrasive means across the width of said fabric thereby avoiding substantial sustained contact between the fab...

A release ski binding having a sole plate which in its center area can be pivoted about an approximately vertical axis and can be tilted up about a transverse axis arranged in front of the vertical axis, which sole plate is held on the ski in the skiing position by a resilient holding mechanism, which holding mechanism is responsive to a swivelling movement of the sole plate relative to the ski an...

A release ski binding having a sole plate which in its center area can be pivoted about an approximately vertical axis and can be tilted up about a transverse axis arranged in front of the vertical axis, which in the skiing position is held on the ski by a holding mechanism biased by a release spring, which holding mechanism is responsive to a swivelling movement of the sole plate relative to the ...

Novel amphoteric emulsifiers are disclosed for solventless and solvent containing mixing grade, oil-in-water anionic and cationic bituminous emulsions, which emulsifiers are the modified reaction products of polyamines with certain polycarboxylic acids and sulfonated carboxylic acids. Modifications are carried out by reacting the nitrogen-containing intermediate with formaldehyde and sodium sulfit...

A method for producing a multi-component, porous PTFE article. Components of PTFE containing a liquid lubricant are placed in intimate contact, dried and then stretched in one or more directions. The PTFE components may optionally contain a filler. The resultant product has a virtually uninterrupted structure at the join and possesses very high bond strengths.

A seal of controlled detachability between a propylene polymer, such as polypropylene, heat sealed to an enamel coated surface comprised of an epoxy resin, an aminoplant resin and an adhesion promoting amount of a carboxylated polypropylene resin, is obtained by incorporating a butene polymer such as polybutene in the enamel coating composition prior to its application to a metal surface.

Polycarbonate water bottles are refurbished by automated cycling through conveyor system having a loading and unloading section, a temperature adjusting section, a vapor exposure section, and a cooling and curing section. Each of the sections are associated in a continuous circuit by means of a conveyor system which conveys a plurality of bottles through the refurbishing system. Each bottle is fir...

A method of preparing a silicone elastomer coated cloth having a surface coating of silicone resin is described. The coated cloth is elastic and pliable with a surface which has superior dirt resistance. The cloth is first coated with an addition-reaction-curing silicone elastomer composition which uses a platinum system catalyst or with an organic peroxide-curing silicone elastomer composition. T...

A multizone element, for quantitative analyte determination in whole blood, containing a porous spreading zone separated from a reagent zone by a barrier zone, said barrier zone comprising a non-porous film comprising a polymer of: from 30 to 95 percent by weight of polymerized monomer having the structure from 0.25 to 30 percent by weight of polymerized monomer having the structure

The present invention is directed to a method of preparing a phenolic foam that has cell walls which are substantially free of perforations. The method comprises using certain anhydrous aryl sulfonic acids as the foaming and curing catalysts. The useful anhydrous aryl sulfonic acids are those which have a pKa of less than about 2.0 and which change the compatibility of the phenolic resole with wat...

An improved apparatus is set forth wherein powder is produced by melting metal in a crucible where it is then poured into a tundish which directs the molten metal onto a spinning disc means. A nozzle plate has a central opening through which the metal is directed from the tundish to the disc means. An efficient annular nozzle means directs a cooling fluid around the disc means. The crucible has me...

CONTROLLING THE CURING TIME OF ALKALI METAL SILICATES USING DERIVATIVES OF GLYOXAL A liquid alkali metal silicate composition comprises water, an alkali metal, e.g., sodium silicate, and as curing agent for said alkali metal silicate, a derivative of glyoxal which is 2,3-dihydroxy-1,4-dioxane or glyoxal trimer. The composition optionally contains a Group I-III metal salt, e.g., calcium chloride an...

The invention relates to a method for producing insulating materials based upon polyvinyl-chloride, whereby extremely light poly-vinyl-chloride particles, in the form of flakes or tangled fibres, having a bulk-density of 10 to 200 g/l, are either encased in foil or are combined into light elements by heating or by adding bonding agents such as adhesives, hot-setting adhesives, hardenable polymers ...

A filament, and optionally a cord of cabled filaments, as a composite of (A) a filament and/or cord of steel, (B) a brass and/or zinc coating thereon and (C) a undercoat comprised of selected compounds. m e invention further relates to a composite of such filament and/or cord as a reinforcement with rubber.