A tool for cracking the shells of sea urchins, comprising a blade formed with central recess which enables the blade to penetrate the shell in the region of the mouth thereof without causing significant damage to the internal organs or roe of the sea urchin, and means for restraining the shell and for moving said blade laterally with respect to said restraining means to thereby open the shell. In ...

1. A lead storage cell with a supply of expander material disposed in the electrolyte, the expander material being separated from the electrolyte by a barrier material which dissolves over the life of the cell, characterized in that the barrier material comprises antimony or a lead/antimony alloy.

An expandible tire-building drum for making toric shaped tire carcasses built in the form of cylindrical sleeves is provided. The cylindrical sleeves have at their extremities, annular bulges which are circumferentially inextensible and are radially developed towards the inside. These bulges form the beads on the carcass. The height of the bead is one-half the difference between the internal diame...

The plate stacks are positioned for further processing in a clamping arrangement with clamping elements between stacks. Each element is displaceable by an amount of play X with respect to its neighboring element.

A plate stack clamping element is formed of adjacent leaf springs preformed to diverge where they extend beyond the plate stack. Compression of the diverging portions creates large area contact clamping force against the plate stack.

A lead battery comprises an active material derived from a lead monoxide. The lead monoxide has a density of 8.3 to 9.2 g/cc, an average particle size not larger than O.2 mu , an infrared absorption peak at a wave number of 1400 to 1410 cm<-1> and a chromatic anhydride reactivity of at least 94% or a heat- treatment product thereof. Starting materials previously used in the preparation of active m...

The present invention relates to an endo-tracheal or tracheotomic tube for anaesthesia, comprising a tubular body for conveying the ventilation and anaesthesia gases and provided in the vicinity of its distal end with an inflatable balloon ensuring tightness, a flexible thermal shield being disposed between said balloon and the proximal end of the tube, at some distance from said balloon. Accordin...

The present invention relates to a method and apparatus for cutting pieces of fabrics of uniform thickness and for stacking these pieces. The method generally includes arranging and maintaining a length of unrolled fabric on a cutting table which comprises a revolving cylinder which rotates so that the length of fabric is positioned to face a cutting instrument. The fabric is cut out according to ...

The instant invention is directed to a process for dissociating cellular and non-cellular polyurethane resins into re-usable starting products for the isocyanate polyaddition process, wherein the polyurethane is reacted with associates of lactams and adduct-formers having at least two Zerewitinoff-active hydrogen atoms at from 150 DEG to 250 DEG C., optionally at elevated pressure, the improveme...

A STEP-IN SKI BINDING A step-in ski binding with a laterally movable side-clamping member, a step-in member coupled to the side-clamping member, a force unit for providing a clamping force and connecting members for moving the movable side-clamping member from its open position to its closed position as the step-in member is moved from a clamp-opened position to a clamp-closed position and for app...

L'INVENTION CONCERNE UN DISPOSITIF DE FERMETURE ETANCHE ET D'ENTREE CONTROLEE D'AIR POUR UN RECIPIENT D'ALIMENTATION PAR SONDE.

SELON L'INVENTION, LE DISPOSITIF COMPORTE UN GOULOT 9 COMMUNIQUANT D'UN COTE AVEC L'INTERIEUR DU RECIPIENT ET DE L'AUTRE AVEC LE MILIEU EXTERIEUR, LEDIT GOULOT ETANT CONFORME AVEC UNE CHAMBRE 10 RECEVANT UNE BILLE 11 FORMANT ORGANE D'OBTURATION POUVANT ETRE MAINT...

PURPOSE:To reduce the apparatus in size, by securing to a rotary shaft a brake plate having an outside diameter substantially equal to that of an armature, and imcorporating an exciting coil in a bracket. CONSTITUTION:An exciting coil 17 is mounted inside a bracket 18 of a motor. One end of a brake pin 19 is secured to the bracket 18, and an armature 20 is slidably engaged through an engaging groo...

A method of producing cross-linked unsaturated polyesters from a solution of a linear unsaturated polyester in a cross-linking agent, wherein a reaction medium comprising said solution and containing free hydroxyl radicals is brought in contact, at room temperature and under atmospheric pressure, with at least one hydrolyzable chlorine-containing derivative in an amount from 0.1 to 10% by weight, ...

A snap rotary table carries thereon rims for abrading machining at the welding zone, which are subsequently moved to positions where the abrading tools, such as grinding wheel and abrasive bands, are operative. The rim supporting means comprise two cantilever facing spaced apart lower bearings and an upper clamping device. Thus, the zone to be machined is exposed on all sides and the abrading tool...

The end or the head of tools such as pliers, cutting pliers and the like is faceted, i.e. it exhibits surfaces which are located in different planes and intersect one another. The machine is suitable for the re-machining of the rough surfaces of such tools by means of preferably flexible grinding tools, such as, for example, belts. The tool is mounted on a workpiece holder which comprises a bearin...

A hydraulically actuated wheel brake with a built-in control device comprising a brake piston including two pressure surfaces each of which defines a different one of two working chambers. The pressure fluid inlet is connected directly to one of the two working chambers and via a valve to the other of the two working chambers, the valve being actuatable upon attainment of a predetermined value of ...

The device, which is connected to an element to be displaced, comprises a tubular body surrounded by sleeves which are inflated to a diameter slightly smaller than the diameter of the conduit. A motor-pump assembly located in the tubular body provides for the circulation of the fluid through the body so as to cause propulsion of the device within the conduit. Sensors may control automatic operatio...