A lead/acid battery having markedly improved performance characteristics is designed, in particular, for use as a starter, lighting and ignition battery for automotive vehicles. Compared with conventional batteries for such applications, the novel battery has a substantially increased peak current and a substantially increased cold-start current level per unit weight and/or per unit volume of the ...

PURPOSE:To enable to obtain sufficiently large dynamic range by attenuating a laser light emitted from a laser oscillator in response to an incident angle. CONSTITUTION:When an angle of 56.7 deg. is applied in the interior of a laser tube 11 to a rectilinear deflecting plate 16, P-wave is theoretically transmitted by 100% through a rectlinearly deflecting plate 16, S-wave is reflected by 15% or mo...

1. A sheet of transparent plastics material of high optical quality comprising a layer based on polyurethane having energy-absorbing properties, characterised in that the layer having energy-absorbing properties is formed essentially of a polyurethane obtained by reactive casting on a flat horizontal support of a reaction mixture of an isocyanate component of viscosity less than 5 Pas at 40 degree...

1. A sheet of transparent plastics material of high optical quality comprising a layer based on polyurethane having energy-absorbing properties, characterised in that the layer having energy-absorbing properties is formed essentially of a polyurethane obtained by reactive casting on a flat horizontal support of a reaction mixture of an isocyanate component of viscosity less than 5 Pas at 40 degree...

In mining a heavy coal seam that must be excavated in several benches, the excavation of the uppermost bench is accompanied by the introduction of a cementitious slurry into the resulting stope for consolidating the waste rock present therein, preparatorily to the excavation of the next-lower bench, and proceeding in like manner with the second bench if a third one is to follow. The cementitious s...

Apparatus for severing thermoplastic sheet continuously produced from an extruder and successively feeding a length of plastic web to an intermittently operated forming machine. The extruded and cooled sheet drops from a roller down on a belt conveyor running at the same speed as the extrusion rate and is transferred towards the forming machine by a pair of clamp chains. The chains extend from spr...

PURPOSE:To observe crystal defects in a substrate of a rare earth matallic pentaphosphate due to bubbles contained in the substrate by etching technique by bringing the surface of the substrate into contact with H2SO4, K2S2O7 or NH4F. HF at a specified temp. CONSTITUTION:A crystal substrate of NdP5O14, LaP5O14 or other rare earth metallic pentaphosphate is brough into contact with H2SO4 at 120-250...

In a lawnmower of the type having a wheel-mounted or roller-mounted frame carrying a horizontal cutter bar under a bladed rotor for cutting grass between them, the rotor consists of a number of spaced rotor plates (11,12) coaxially mounted on a shaft, each plate having a circular peripheral series of pitched blades (13) which, as the rotor is driven, move sequentially from front to rear over the c...

1. Felt consisting of fibres of a glass material, the fibres being produced by passage of the material in the molten state through orifices disposed on the periphery of a centrifuge and possibly drawn out by gaseous currents surrounding the centrifuge, characterised in that the mass of particles of a diameter greater than ten times the mean diameter of the fibres constitutes less than 1% of the ma...

A hydraulic elevator buffer includes a fluid container 16 containing a piston 12 which is pushed down within a cylinder 18 into a volume of hydraulic fluid. The buffer has no seals separating its interior from the atmosphere. As the piston 12 is pushed down, the displaced liquid is forced through ports 18a in the cylinder 18 which gives rise to a restricting force. The displaced liquid escapes int...

PURPOSE:To improve the working efficiency by winding a coil in the prescribed number of turns, simultaneously engaging the end of the wound coil with a hook provided at a commutator, and sequentially continuing the winding operation. CONSTITUTION:The unit coil 47 of a flat armature coil is wound in the prescribed number of turns by the rotation of a flier 18 which rotates simultaneously with a rot...

An object is produced from a tubular blank (10,15,17) of thermoplastic material of polyester or polyamide, preferably of polyethylene terephthalate by reducing the thickness of amorphous material in one or several areas of the blank by means of one or several consecutive re-shaping operations. A mechanical shaping device (23,29,71,81) moves a transitional zone (13,14,113) situated between thicker ...

PURPOSE:To enable to perform a stable bonding by elevationally moving upward and downward a clamper at an oblique angle substantially equal to that of a guide hole of a horn, and forming an escape at the inlet of the guide hole of a tool, thereby obtaining the necessary length of wire to bond a bonding surface. CONSTITUTION:The first guide hole 6 is disposed at an angle larger than the angle of a ...

PURPOSE:To realize a washer for semiconductor substrates, capable of easily removing the electrification of static electricity to generate at the time of washing, by a method wherein introducing ports for ionized gas are provided with a washing vessel and the foam of the ionized gas is introduced in washing solution in such a figure as to come in contact to the semiconductor substrates. CONSTITUTI...

PURPOSE:To bring both lowering of surface density and abnormal depth of a diffusion layer to nil by a method wherein a diffusion source heating device, with which the diffusion source will be preheated to the temperature close to the diffusion temperature independently from the source of heating, is provided on the feeding side of diffusion source of a heating vessel. CONSTITUTION:A diffusion sour...

PURPOSE:To increase the rising and falling temperature speed by changing the temperature of a substrate while the temperature of a furnace is being maintained constantly by a method wherein the rising and falling temperatures of the substrate are controlled by changing the putting-in and taking-out speed of a boat carrying a semiconductor substrate into or out of a furnace. CONSTITUTION:The output...

PURPOSE:To improve the corrosion resistance of a Pb-Ca alloy contg. Ca by an amount exceeding the limit of solubilization at room temp. without reducing the mechanical strength by repeatedly subjecting the Pb-Ca alloy to soln. heat treatment and age hardening several times. CONSTITUTION:A Pb-Ca alloy contg. Ca by an amount exceeding the limit of solubilization at room temp. such as a Pb-Ca-Sn allo...