An apparatus, particularly a microscope, for the examination of a plurality of gemstones, pearls or similar small objects, comprises means to create dark-field illumination and a slide-type displaceable specimen holder of plastics material which has an elongate recess in its upper surface with a cross-section which narrows towards the bottom of the recess for example. The means to create the dark-...

A bearing sensing device for use in an automatic vehicle guidance system has a lens, such as a fish eye lens (50) or a spherical reflecting lens (60), having a substantial angle of view in elevation and almost a full 360 DEG view in azimuth. Light from the lens (50, 60) is focused onto a substantially annular photo detector (54), which is connected to means for relating a focusing point (72) on t...

A gear wheel is formed from a pressed and sintered powder metal blank (2) by surface hardening the tooth, root and flank regions to establish densification in the range of 90 to 100 per cent to a depth of at least 380 microns.

A fast molding foamable composition comprising a terpolymer of ethylene, 10 to 40 percent by weight of a softening monomer and 1.0 to 20 percent by weight carbon monoxide, a free radical crosslinking agent and a chemical blowing agent.

PURPOSE:To obtain a Bi-based superconducting oxide thin film excellent in critical temperature and critical current density by forming an Sb thin film on the surface of a Bi-Sr-Ca-Cu-O-based oxide thin film and then heat-treating the resultant multilayered film. CONSTITUTION:An Sb thin film is formed on the surface of a Bi-Sr-Ca-Cu-O- based oxide thin film or a Bi thin film is further formed there...

PURPOSE:To enable the precise, rapid and stable manufacture of a superconductive billet and obtain a superconducting wire material having an excellent quality by combining a molding device for focusing and forming composite superconducting elements wire with heat treatment. CONSTITUTION:Composite superconducting element wires 1 are adjusted so that they can be precisely received in a vessel consis...

A process for preparing particles of a high water-absorbent resin which comprises mixing a powder of a high water-absorbent resin with a solution of a sorbitan surfactant having an HLB of 2.1 to 5.0 dissolved in an organic solvent, volatilizing the organic solvent from the mixture to give a resin powder with a content of the organic solvent of not more than 5% by weight, adding water to the mixtur...

An expanding-wedge device (6) is bolted onto a brake carrier (1), which in use is mounted on an axle stub, and has a collar (20) which is fitted into a through-opening (18) of the brake carrier. This through-opening (18) is coaxial with the axis of a diaphragm cylinder (8) co-acting with the expanding wedge device (8) and a guide tube (7) of the diaphragm cylinder (8) is directly or indirectly mou...

A device for discontinuing and automatically restoring the operational function of a spring brake actuator comprises a piston (9) with a piston rod (10) and a spring (13) actuating the piston and piston rod in a working direction for brake application at falling brake fluid pressure on the piston, a slitted, resilient locking ring (15) being arranged in grooves (16, 17) facing each other in the pi...

A burner for operating in a high temperature and high pressure atmosphere such as in a fuel burning gasifier, requires a high degree of cooling such as by water circulation through the burner. In the event of physical breakage or damage to the normal cooling system, means is provided for introducing a higher pressure coolant into the system. The latter fills the system, both upstream and downstrea...

This invention provides an erasable optical disk, on which information is recorded and reproduced repeatedly through the irradiation of laser beams, and an optical information recording/reproduction apparatus which records and reproduces information on the erasable optical disk. In erasing and then recording information on the erasable optical disk by using an erasing laser beam and a recording/re...

By drilling in the center of pure Nb ingot mould to make single-core Cu/Nb composite extrusion pipe to replace Nb pipe, putting 3rd elements such as Mg or Ti etc on Cu layer inside the Cu/Nb extrusion pipe or at the same time on Sn-Cu alloy enriched in tin, and using multicore Cu/Nb composite pipe or Cu/Nb alloy to replace copper sieeve, the present invention had overcome the disadvantage of the...

PURPOSE: To maximize the versatility of lighting configurations using lighting modules, by forming a lighting system out of a base, elongated stems, and at least one mounting frame. CONSTITUTION: A universal mounting system 10 comprises a base 12, elongated stems 13, and one or more mounting frames 14, and one end part of each elongated stem 13 attached to the base 12. The other end part of each e...

PURPOSE: To obtain an element with a horizontally isolated semiconductor region with a planar element structure and its vertical side wall by forming an insulated side wall impermeable against impurity and oxidation in order to horizontally insulate the semiconductor region formed on a substrate. CONSTITUTION: A polysilicon semiconductor layer 16, a silicon nitride insulating layer 18 and a dielec...

Disclosed is a method of reducing the friction coefficient between water and surfaces of polymeric articles and of increasing the water repellency of said surfaces, which method comprises treating said surfaces with a corrosive agent, and thereafter coating them with a thin layer of fluorinated polymer.

A differential (16) comprises a driving carrier (18) and two driven output gears (19) connected to joints (11) to driveshafts (12). The assembly (8) also comprises a clutch (48) by which one of the gears (19) may be connected directly to the carrier (18). The joint (11) associated with said gear (19) is positioned outside the differential (16) directly adjacent thereto and extends coaxially around...

PURPOSE: To exclude a harmful factor without using a filter device by periodically turning on/off a transmitter and performing reception or detection only during a pause of transmission. CONSTITUTION: A single device is so operated that the transmitter periodically radiates an electromagnetic pulse, which has a spectrum covering the resonance frequency of a label (wide band) and generates energy e...

An image blur correcting apparatus includes a lens-barrel part having a lens and an imaging device, an image signal processing device for forming a video signal from an electrical signal obtained at the imaging device, a supporting body for supporting the lens-barrel part in a freely pivoting manner around a rotation axis crossing a beam axis incident to the lens-barrel part at approximately right...

A phosphonate ester (vinyl phosphonic acid reacted with equimolar diol) will cure on command (e.g. exposure to light) in the presence of an initiator. By adding inert filler, poly(vinyl phosphonic acid), ion-leachable glass powder and water, a command-curable dental cement with glass ionomer characteristics is obtained.

A layer of material which is situated under water, for example sand and gravel, where the layer is overlaid with non- exploitable or unwanted bottom layers is extracted by a casing-conveying pipe 1 with a displaceable drill bit 2 and an oscillating rotating mechanism 4. In operation the drill bit passes through the unwanted layers in the closed position together with simultaneous flushing with wat...