An improved hard facing for teeth and other surfaces of milled tooth rock bits comprises steel in the range of from 18 to 32 percent by weight, and filler in the range of from 68 to 82 percent by weight. The filler is cemented tungsten carbide and cast tungsten carbide free, and includes greater than 95 percent by weight single crystal monotungsten carbide particles. The single crystal monotungste...

The guide has nozzles (12,14,16) arranged in zones (6,8,10) inside its guide face. The nozzles (12) in the first zone (6) are formed by blow nozzles whose jet is directed in the transport direction (A) of the sheets. The nozzles (14,16) in the second and third zones (8,10) are formed by nozzle jets directed away from the longitudinal axis of the guide face to its edges. The nozzles of the first zo...

A probe such as an endoscope equipped with a biopsy needle is guided to a target in or adjacent to the respiratory system. The position of the probe is monitored and a representation of the probe is superposed on a previously acquired image of the respiratory system and adjacent tissues. Artifacts caused by motion due to respiration are suppressed by monitoring the respiratory state of the patient...

PCT No. PCT/GB92/01719 Sec. 371 Date Jun. 10, 1994 Sec. 102(e) Date Jun. 10, 1994 PCT Filed Sep. 18, 1992 PCT Pub. No. WO93/06045 PCT Pub. Date Apr. 1, 1993A method of reducing the concentration of at least one organic compound present in an aqueous feedstock, wherein said feedstock is supplied to one side of a substantially water-insoluble selectively permeable polymeric sheet or tubular membrane...

The utility model relates to a furnace utilizing the solar energy, which is composed of a circular convex lens with a major diameter, a lens holder, a heat transfer steel plate and a furnace platform, wherein, the convex lens is fixed on the lens holder and is positioned above the furnace platform. The heat transfer steel plate is arranged on the upper side of the furnace platform, and the focus p...

The present invention provides isolated recombinant nucleic acid constructs comprising a dual bacterial promoter operably linked to a heterologous nucleic acid which encodes a desired polypeptide. The constructs are useful for the expression of the desired polypeptides in bacterial cells at high levels.

The net consists of a number of woven net cords (V1-7), which are connected to form a mesh. At least a part of the net cords consists of a knitted fabric. The cords are made of threads with differently elasticities. Alternatively, the threads can be differently laid, i.e. have different pitches, so that the net cords have elasticity characteristics, which can be described with an elasticity charac...

A mobile measuring instrument that can be worn on the body of persons with a springless holder (1) for detachable fastening to pieces of clothing, with the following features: a plate (8) has a recess (9) with a cutout on one of two shorter sides; a flat slide element has a guide element (12) and is displaceably connected with same to the plate (8) via the cutout (10); both the plate (8) and the s...

Closed cell polyurethane foams, useful as thermal insulation for refrigerators and the like, are prepared by blending a polyisocyanate, a polyol and a suspension of at least one solid alkaline reagent, preferably sodium hydroxide, in an inert carrier liquid having a suitable viscosity. Preferred carrier liquids include polyepoxides and polyoxyalkylenediamines. The alkaline reagent reacts with and ...

A hair clipper body (10) has a support tongue (34) pivoted on an inclined front end (9). A cutter head assembly (12) engages with the clipper body using a tongue receiving socket (42) having a strap (40) on the bottom blade (14). Projections (50,52) are received in slots (44,46) when the support tongue is inserted and the head is attached to the body. The cutting head can be engaged with the body ...

The sinterability of a copper/tungsten green compact is improved by using copper oxide, tungsten oxide or both as the copper and/or tungsten source. Sinterability is further enhanced by including steam in the sintering atmosphere.

The polyester film has an opaque first layer having an optical density greater than 2.0, and a white second layer. The opaque first layer preferably contains carbon black. The film is particularly suitable for use as a base for a photographic sheet.

A watchdog circuit for a microprocessor which has a reset input and a control output, which output, when operation is normal, periodically delivers, under program control, a signal (P0B2) of predefined duration (t2); and having a capacitor (32) that can be charged via a charging circuit; having a discharging circuit (40, 42), controlled by the control output, for said capacitor (32), for periodic ...

A method and apparatus for introducing an oxidant mixed with a carrier gas into pre-heating zone of a continuous furnace for effectively removing lubricant from powder metal compacts prior to sintering at high temperatures. Mixing a controlled amount of a gaseous oxidizing agent such as moisture, carbon dioxide, air or mixtures thereof with a carrier gas and introducing the mixture into the prehea...

A tyre (T) is vulcanised by heating the tyre (T) from both an outer forming surface (So) of an outer mould (2) and an inner forming surface (Si) of an inner mould (3). The inner forming surface (Si) is divided into a plurality of inner forming surface portions (Si1,Si1,Si2) in accordance with portions of the tyre (T), and the inner mould (3) is provided with heaters (5U,5L,5M) capable of heating t...

A system for lowering the power output of a video display monitor for a computer during periods of operator inactivity senses the presence or absence of horizontal synchronization (HSYNC) and vertical synchronization (VSYNC) signals, which are normally supplied by the host computer to synchronize data transfer to the video monitor with horizontal and vertical sweep circuitry. Time sensing means at...

A process for the recovery of scrap polyurethane polymer in the form of a polyol, and the use of said polyol to prepare a fresh polyurethane polymer. Said process involves thermally treating scrap polyurethane at an elevated temperature with a liquid mixture which consists of an alkanolamine and a metal hydroxide and subsequently reacting the resulting intermediate product with an alkylene oxide c...

The invention is directed to methods for the pretreatment of a lignocellulose-containing biomass. Pretreatment comprises the addition of calcium hydroxide and water to the biomass to form a mixture, and subjecting the mixture to relatively high temperatures for a period of time sufficient to render the biomass amenable to digestion. The pretreated biomass is digested to produce useful products suc...

Method for determining at least one optimal trajectory between a point and a target situated in a medium and forming a centered volume, the position of each of whose points is known with geometrical uncertainties, characterized in that it consists in defining for the centered volume a gain which takes different values from the center to the peripheral boundary, and a zero value outside the centere...

A dyestuff capable of undergoing a clearly visible colour change when contacted with a color-developing material is dispersed in the body of a plastics film and used in the identification of goods. The film can be used for packaging of the goods or as a label or seal affixed to the goods. When testing the authenticity of packaging goods, the plastics film is marked with the color-developing chemic...