baber/WOPTO huggingface dataset:
Patent GB-1029188-A (GB)
Title: Improvements in or relating to coherent light generators
Inventor: THOMAS ERIC LIONEL
IPC: H01S3/30
Filed: 1963-11-05
Abstract: 1,029,188. Lasers. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Nov. 4, 1964 [Nov. 5, 1963], No. 43653/63. Heading H3B. A coherent light generator comprises laser active material 2 (e.g. ruby) in a resonant cavity 1, 4, the laser beam being directed through a Raman effect material 3 (e.g. liquid benzene) and the transmitted beam 10 being directed through a non-linear dielectric material 5 (e.g. ADP, KDP, quartz, calcite or CdS). Laser pulses are generated by Q-switching by means of a rotating prism 1, the pumping source 7 being synchronized with the rotation by contacts 11. Alternatively a fixed mirror may be provided and the output controlled an electrooptical switching device rendered translucent by a control signal. The dielectric crystal 5 may be placed in the resonant cavity, or both crystal 5 and Raman effect material 3 may be placed outside the cavity. In operation material 3 transmits energy at the original laser frequency and at Raman shifted frequencies. Crystal 5 generates sum and difference frequencies and harmonies of the frequencies incident upon it. Crystal 5 is preferably arranged in the phasematching position so that the chosen output ray and the vector sum of the rays from which it is derived are in phase throughout the crystal. Where phase matching is impossible the crystal may be arranged to subject the beam to multiple internal reflections, the path length between successive reflections being selected to cause 180 degrees differential phase shift between the output ray and the rays producing it. Alternatively multiple reflections between a pair of parallel dielectric crystals may be utilized without differential phase shift. The system may be operated on a CW basis. Suggested applications are in the study of the Raman effect and identification of Raman effect materials.
Patent GB-1524607-A (GB)
Title: Crucible-free zone melting of semiconductor rods
IPC: C30B29/06
Filed: 1976-10-21
Abstract: 1524607 Crucible-free zone melting WACKER-CHEMITRONIC GES FUR ELEKTRONIK-GRUNDSTOFFE mbH 21 Oct 1976 [4 Dec 1975] 43719/76 Heading BIS  In crucible-free zone-melting in which the semi-conductor rod is vertically mounted and is melted by means of a coaxial induction coil, the rod is electrically insulated from the closed containing vessel. Suitable apparatus comprises rotatable upper and lower shafts 1, 11. A rod mounting 4 is attached to the upper shaft via a quartz insulator 2 and a screw 3, the insulator and corresponding section of the screw being non-circular e.g. square. The lower end of the rod is attached via a seed crystal 8, a mounting 9, a quartz ring 10 and a receiving member 12 to the lower shaft 11. The insulating material may alternatively be ceramic e.g. silicon nitride and aluminium oxide. The semi-conductor may be silicon. The mountings themselves may be of insulating material. The coil 13 may be a solenoid, a single- or multiwinding toroidal coil, or a single-winding flat coil.
Patent GB-931734-A (GB)
Title: A contact screen for reproduction photography and the production thereof
Inventor: REBNER WERNER
IPC: G03F5/16
Filed: 1959-12-24
Abstract: 931,734. Photographic contact screens; silver halide materials. AGFA A.G. Dec. 24, 1959 [Dec. 27, 1958], No. 43880/59. Drawings to Specification. Class 98 (2). A contact screen comprises screen dots wherein the density gradation of each dot extends from a density minimum to a density maximum along a path which sags from the straight line joining the density minimum to the density maximum, the sagging range (as defined in the Specification) being within the range of 15-35%. The contact screen may be prepared by exposing, through a screen, a photographic material the density curve of which sags by 20-35% in the positive or negative direction between the density stages 0.3 and 3.0, and developing the exposed material. The photographic material may comprise a Brovira-hard and a Brovira-soft emulsion coated as a mixture in a single layer or as separate layers, or it may comprise a mixture of Brovira-extra hard emulsions which differ in speed. Details of the preparation of suitable emulsions are given. Specifications 845,217, 878,487 and 884,251 are referred to.
Patent GB-1550547-A (GB)
Title: Shuttleless loom
IPC: D03D47/34
Filed: 1977-10-21
Abstract: A shuttleless weaving machine has the following elements between the stationary yarn package (6) and the shed, in this order: a thread draw-off device (5), a storage device (10), a thread clamp (12) controlled in time with the weft insertions, and an insertion member (3). The thread clamp (12) is arranged on the slay (1). This prevents the weft thread (4) from being overstretched during throw-on, where the thread clamp (12) is closed. <IMAGE>
Patent GB-1245924-A (GB)
Title: Improvements relating to thermo-recording
Inventor: BRINCKMAN ERIC MARIA
IPC: B41M5/04
Filed: 1967-09-27
Abstract: 1,245,924. Thermographic processes. AGFA GEVAERT. Sept.13, 1968 [Sept.27, 1967], No.44038/67. Heading G2C. A thermographic process comprising imagewise heating a material containing a recording layer with one of the following polymers or polymeric compositions:- (a) galactomannan, (b) hydroxypropyl methyl cellulose, (c) a methylol- or etherified methylol-melamine resin which has been slightly hardened, (d) a resorcinol formaldehyde resin, (e) a polyvinyl alcohol mixed with a compound containing reactive carbonyl groups (f) a water-insoluble polymer of formula wherein Z completes an aromatic nucleus and R is hydrogen or a group which maintains the basic properties of the nitrogen atom to which it is attached mixed with an acidic compound (g) a water-soluble polymer or co-polymer of an α, #-ethylenically unsaturated compound containing at least one carboxylic acid mixed with a reactant such as 2, 4-dihydroxy benezophenone which forms a product less soluble in water than the unsaturated compound which is dissociated on heating, (h) a phenol- or a cresol-formaldehyde Novalak (i) a polymer containing an azo group linked through a carbon atom to a nitrile group (j) poly-N-vinylpyrrolidene, (k) crude and/or bleached shellac (1) poly (1, 2-dihydro-2, 2, 4- trimethyl-quinoline (m) poly-N- vinylpyrrolidene mixed with water-soluble melamineformaldehyde resins (n) polyvinyl alcohol or hydrolysed polyvinyl acetate mixed with a quinone diazide and an aldehyde or compound splitting off aldehyde on heating (o) a copolymer of styrene and N-vinyl pyrrolidene (p) a copolymer of styrene and an acrylic ester and (q) a styrene/butadiene copolymer mixed with an o-quinone diazide, these polymers or compositions becoming more soluble in a solvent on heating, treating the recording layer with such a solvent so as to (i) remove the heated areas by rubbing or rinsing, (ii) transfer the heated areas to a receptor sheet or (iii) form a visible image by using a solvent with a dye or a colour former (if the recording layer contains the other component) or a bleach (if the recording layer contains a substance which can be bleached out). Specified solvents are water for compositions (a) to (g), aqueous alkali for compositions (h) to (k), ethyl alcohol for compositions (k) to (o), a Ketone for compositions (o) and (p) and a chlorinated hydrocarbon for composition (q). The recording layer may contain a light or infrared absorbing, heat-generating pigment and be imagewise exposed to flash as disclosed in Specifications 1,139,891 and 1,160,221. Printing plates may be produced if the heated areas are removed and reversed plates may be produced by using the process of Specification 1,142,422. Alternatively, the heat-generating pigment may be included in a subbing or overcoat layer; if in the latter, this is removed when the material is developed. Hectographic masters may be produced if the recording layer contains an appropriate dye.
Patent GB-1404282-A (GB)
Title: Method of removing fission products from a nuclear reactor coolant
IPC: G21C19/31
Filed: 1973-09-20
Abstract: 1404282 Nuclear reactors WESTINGHOUSE ELECTRIC CORP 20 Sept 1973 [28 Sept 1972] 44065/73 Heading G6C Fission products are removed from the coolant of a nuclear reactor by passing the coolant in a flow loop connected to the reactor primary circuit 12, the coolant being conducted through a first vessel 22 at a relatively high temperature, where it picks up precipitation-facilitating reactants, and then through a second vessel 24 at a relatively low temperature, where reactants and fission products are precipitated, and, when the reactants in the first vessel are substantially exhausted, the flow direction is reversed so that coolant passes first through the second vessel 24 at a relatively high temperature, where reactants and fission products become re-dissolved in the coolant, and then through the first vessel 22 at a relatively low temperature, where reactants and fission products are precipitated. The direction of flow is determined by the settings of various valves 18-20 which are switched automatically by means of a monitor 25 which senses the radio-active impurity concentration in the loop between the two vessels 22, 24 and hence assesses when the reactant contents of the appropriate vessel 22 or 24 has fallen to a level requiring flow reversal. Automatic switching is also effected by the monitor 25 to change the mode of operation of the appropriate vessel 22 or 24 from hot to cold and vice versa. Wire mesh within the vessels, and on which the deposits collect, are replaced as necessary when indicated by a monitor 26 on the output side of the loop. Where the reactor is a fast breeder employing liquid sodium as coolant, the reactants comprise NaH, Na 2 O, and NaI for removal of tritium, Ba-140, Cs-134, Cs-137; Cs-141, Zr-95, I-125 and I-131.
Patent GB-863060-A (GB)
Title: Sulphanilamido-pyrazoles
IPC: C07D231/42
Filed: 1959-12-30
Abstract: The invention comprises sulphanilamidopyrazoles of the formula: <FORM:0863060/IV (b)/1> wherein R1 and R2 are alkyl (e.g. methyl, ethyl, n-propyl and isopropyl) or cycloalkyl (e.g. cyclohexyl) radicals, R1 and R2 together containing 2-8 carbon atoms, and acyl derivatives of these compounds, and their preparation either by reacting a benzensulphonyl halide bearing a p-amino or p-acylaminosubstituent with the appropriate substituted 5-amino-pyrazole-1 : 2, or by reacting an acylacetyl sulphonamide <FORM:0863060/IV (b)/2> wherein W is a p-amino- or p-acylamino group, with a hydrazine derivative H2N,NHR1 or a functional derivative thereof, in an acid medium, the acylamino group W in the above processes being subsequently converted an amino group by saponification, if desired. 5-Amino-pyrazoles bearing substituents R1 and R2 in the 1- and 3-positions, used as starting materials, are made by reacting an acylacetonitrile R2CO,CH2,CN with a hydrazine H2N,NHR1. N1-Acylacetyl-sulphonamides <FORM:0863060/IV (b)/3> used as starting materials are made by the reaction of an alkali-metal salt of a sulphonamide with a phenyl ester of a b -keto-carboxylic acid or by the known diketene method.
Patent GB-1196098-A (GB)
Title: A Semiconductor Device and a method of Manufacturing the same
IPC: H01L21/316
Filed: 1968-09-19
Abstract: 1,196,098. Semi-conductor devices. HITACHI Ltd. 19 Sept., 1968 [2 Oct., 1967]. No. 44663/68. Heading H1K. In a semi-conductor device, such as the PNP Si transistor illustrated, a P-type region 25 is diffused into an N-type region 24 through an aperture in a thermally grown oxide layer 22a, 22b and a layer containing the dopant which is deposited during the diffusion process is then removed. A further insulating layer 26 is then deposited over the exposed P-type region 25 at a temperature at which no further acceptor diffusion occurs. The layer 26 may be of silicon oxide deposited by vapour deposition, sputtering or the pyrolytic decomposition of tetraethoxysilane at 750 C. or of monosilane at 320 C., or it may be of Al 2 O 3  or Si 3 N 4  alone or combined with silicon oxide. In the embodiment shown the layer 26 is deposited over a photo-resist layer on the thermally grown oxide layer 22a, 22b, the unwanted portions being removed. Alternatively the layer 26 may be deposited directly on to the layer 22a, 22b as well as on to the exposed P-type region 25, and may be retained thereon to improve passivation. In the device shown Sb, B and P are respectively diffused into the P-type collector region 21 to form the base region 24, emitter region 25 and base contact zone 29. Al, Mo or Zr is used for the electrodes 30, 31. The collector region 21 may be formed as an epitaxial P-type layer on a P + substrate and a P + guard ring may also be provided around the base region 24.
Patent GB-1530209-A (GB)
Title: Diapositive slide frame
IPC: G03B21/64
Filed: 1976-10-28
Abstract: 1530209 Slide transparency frame F HETZMANNSEDER [trading as BONUMWERK INH FRIEDRICH HETZMANNSEDER]  28 Oct 1976 [2 Sept 1976] 44743/76 Heading G2X A slide frame comprises two plastic component frames 1, 1a, and two bars 6 which are mounted for a limited longitudinal sliding movement adjacent and substantially parallel to two opposite edges of the frame window 4, the bars serving to hold a mounted slide transparency (F) in a planar condition in alignment with the window and having teeth 7 for engaging the slide perforations 8, the bars in the completed frame being free from spring bias and restrained by each other and/or the component frame against displacement towards one another.
Patent GB-1511480-A (GB)
Title: Vehicle lamps
IPC: F21S8/10
Filed: 1974-10-16
Abstract: 1511480 Vehicle lamps LUCAS INDUSTRIES Ltd 17 Sept 1975 [16 Oct 1974] 44791/74 Addition to 1148761 Heading F4R A vehicle headlamp unit is adjustably secured to a support 12 by means of a screw 18 which is rotatably mounted in the rim 16 of the unit and engages a nut 22 slidable in a sleeve 24 secured to the support. The nut, which is formed at one end of a sleeve 23, is urged away from the support by a spring 28, and a rotatable cam acting on the sleeve 23 moves the nut and screw against the force of the spring to give a coarse adjustment of the headlamp position, rotation of the screw giving fine adjustment. The cam is rotated through a Bowden cable or the like by a knob on the dashboard, the cams of a pair of headlamps being interconnected.
Patent GB-1133453-A (GB)
Title: Ductile tungsten composition
IPC: C22C32/00
Filed: 1965-10-22
Abstract: 1,133,453. Ductile tungsten; sintered tungsten. BENDIX CORP. Oct.22, 1965 [Oct.26, 1964], No.44833/65. Headings C7A and C7D. A ductile composition consists of sintered tungsten containing less than 20% by volume of magnesium aluminate, magnesium chromate zinc aluminate, nickel aluminate, calcium chromate or mixtures thereof. The composite powder was heated to 2700‹ F. in dry hydrogen then to 3600‹ F. in argon and sintered at this temperature for four hours.
Patent GB-1160564-A (GB)
Title: Improvements in or relating to Reciprocating Pumps for Liquefied Gases
IPC: F04B53/16
Filed: 1966-10-07
Abstract: 1,160,564. Reciprocating pumps. PHILIPS' GLOEILAMPENFABRIEKEN N. V. Oct. 7, 1966 [Oct. 11, 1965], No.44936/66. Heading F1A. A reciprocating pump for delivering liquefied gas from a vessel 2 to a circulating system includes two concentric chambers, defined by tubes 6 and 9, which surround the piston rod 18. Liquefied gas is delivered to the circulating system through a first chamber surrounding the piston rod and having an outlet 17 and returned from the system through an inlet 12 to the second chamber defined between the tubes 6 and 9. The second chamber is provided with apertures 15 for return of liquid to the vessel 2 and an outlet 13 for vapour, arranged above the inlet 12, and communicating with the atmosphere through a jacket 21 filled with heat insulating material, e. g. sponge polystyrene. The pump may be constructed of stainless steel and driven by an electric motor 20.
Patent GB-1196927-A (GB)
Title: Corona Generating Device
IPC: H05F3/04
Filed: 1967-10-04
Abstract: 1,196,927. Corona charging apparatus. RANK XEROX Ltd. Oct.4, 1967 [Oct.11, 1966], No. 45222/67. Heading G2H. A corona charging apparatus has one or more corona wires 48 secured at one end to insulating blocks 52 secured between side walls 44, 46 of a U-shaped shield and at the opposite end to longitundinally slidable insulating blocks 60 urged outwardly by springs 70 which maintain constant tension in the wires 48 during expansion and contraction of the wires. The apparatus may be used for charging sheet material (12) Fig. 1 (not shown) during passage around a drum (20) which conveys the material past an infrared fixing apparatus (32).
Patent GB-1101235-A (GB)
Title: Improvements relating to photographic exposure control
IPC: G03B7/16
Filed: 1965-10-27
Abstract: 1,101,235. Exposure control; cameras. INTERNATIONAL POLAROID CORPORATION. Oct. 27, 1965 [Oct. 29, 1964], No.45520/65. Heading G2A. In a camera, an exposure aperture 30 and an aperture 31 for an extinction photo-meter or for a photo-cell driving a null-meter are defined by notches in the pivotal diaphragm vanes 26, 27 which are manually adjusted by actuator 32, these vanes carrying indicating indicia 51, 52 calibrated in terms of subject distance for direct manual setting with flash lighting. The camera has a fixed speed shutter as disclosed in Specification 1,101, 234 and cam means 34, having a helical slot 39 receiving cam followers 38, is rotated by handle 33 to adjust vanes 26, 27 in a scissor movement. This adjustment sets the light intensity to the standard value of a lamp in the photo-meter or to the null-point of the galvanometer needle if a photo-cell is used, and in each case the exposure aperture is thereby set. The indicia 51, 52 extend through the camera casing for direct viewing during flash setting.
Patent GB-1069226-A (GB)
Title: Polyvinylchloride-containing compositions
IPC: C08K5/00
Filed: 1965-10-27
Abstract: A composition comprises a polymer of vinyl chloride having at least 55% of its chlorine atoms arranged in a syndiotactic manner and a plasticizer in an amount of from 20 to 60% by weight of the total composition.  The polymer may be a copolymer of vinyl chloride with another ethylenically unsaturated monomer such as vinyl acetate.
Patent GB-1409800-A (GB)
Title: Precision balance having a device for raising weights
IPC: G01G1/28
Filed: 1972-10-04
Abstract: 1409800 Precision balance LIBRA ROTOGET SRL 4 Oct 1972 [5 Oct 1971]  45667/72 Heading G1W A precision balance comprises a beam 3 pivoted at 4, a counterweight 6, a set of balance weights 8 which normally load beam 3 so that the beam is balanced with no load on the pan 2, and a mechanism for selectively raising the weights to balance the beam when a load is placed on pan 2. The weights 8 are in the form of horizontal concentric annular rings supported from the beam 3 by rods 9 and slotted arms 15, a member 10 connected to the rods 9 resting on a pivot 11 of the arm Fig. 2. The mechanism for selectively raising the weights to balance the beam comprises four rotatable annular plates 30, 31, 32, 33 which have camming profiles 34 on their upper surfaces, and vertically slidable pins 28, 29 carried by cross-members 26 and co-operating with the profiles 34 whereby, according to the angular positions of the plates 30, 31, 32, 33, selected pins are displaced vertically upwards to raise-selected weights 8 off the arms 15 and to hold the raised weights against crosspieces 25. Each plate 30, 31, 32, 33 is supported by three gear-wheels 36 meshing with gear teeth 35 formed on the underside of the plate, and one of the three gear-wheels 36 is linked to a weight setting control knob 12, 12a, 13 or 13a on the front of the balance Fig. 3. Each control knob is provided with a detent device 55, 56 for locating it in the correct weight raising position. Each weight is raised by two diametrically opposed pins 28 which co-operate with a single or a pair of camming profiles 34, and each pin is spring-loaded Fig. 7 (not shown). A device for locking the annular plates 30, 31, 32, 33 in a desired position Fig. 8 consists of a plate 59 provided with pins which engage holes in the plates, the plate being normally biased to the non-locked position by springs 68, but actuation of a lever 70 Fig. 1 causing beam 69 to fall and move the plate 59 upwardly into its locking position by means of lever 63. The beam 3 is also provided with a damping device 7, and with an optical projection vernier read-out device.
Patent GB-1278355-A (GB)
Title: Reaction products of certain metal/borate ester complexes and chlorosilanes
IPC: C07F15/02
Filed: 1969-09-16
Abstract: 1278355 Complexes and polymers form chlorosilanes borate esters and metal chlorides VENTRON CORP 16 Sept 1969 [23 Dec 1968] 45680/69 Headings C3S and C3T A complex or polymer is prepared by heating between room temperature and 200‹ C., until organic chloride ceases to be evolved, a chlorosilane Cl n SiR 4-n , wherein n is 1-4 and R is a C 1-8  alkyl or a phenyl or tolyl radical, with a complex obtained by heating a borate ester with a chloride of trivalent Al, Fe, Ga, or In, tetravalent Ti, Zr, Hf, or Sn, pentavalent Sb, Mo, Nb, or Ta, or hexavalent W, in a ratio of at least 0À33 moles of borate per mole of metal chloride in an inert diluent between room temperature and 200‹ C. until organic chloride ceases to be evolved, the molar quantity of silane not exceeding that of the metal in the complex. In examples the product from reaction of 0À5 mole of TiCl 4  with 1 mole B(OCH 3 ) 3  in CH 2 Cl 2  was heated with (C 6 H 5 ) 2 SiCl 2  or (CH 3 ) 2 SiCl 2  or (CH 3 ) 3 SiCl. The products are hydrolysed by water to give water-repellent gums. The products of Examples 1 and 2 have analyses corresponding to structures of the type and
Patent GB-1159566-A (GB)
Title: Liquid Polythiopolymercaptan Product and Process
IPC: C08G18/83
Filed: 1966-10-12
Abstract: 1,159,566. Polythiopolymercaptan urethane polymers. THIOKOL CHEMICAL CORP. 12 Oct., 1966 [23 Oct., 1965], No. 45681/66. Heading C3R. Polythiopolymercaptan urethane polymers that are liquid at 100 C. are prepared by reacting at 20 to 150 C., a disulphide-containing polyol of M.W. 150 to 15,000, a polyisocyanate of M. W. 150 to 1,000 and a polymercaptan having 2 to 4 mercaptan groups and of M.W. 90 to 1,000 in a non-alkaline environment such that the ratio of equivalents of NCO to OH groups is 1: 1 and the ratio of equivalents of SH groups to -S-S- groups is from 1: 130 to 4: 1. The reaction preferably takes place in the liquid state by adding the polymercaptan to the polyol reactant and/or its urethane chain extended polymer intermediate. A suggested reaction scheme indicates a mercaptan disulphide interchange and a disulphide interchange, occurring at the disulphide linkages of the urethane chain extended polymer intermediate to form the polymers of the invention. Numerous disulphide-containing polyols are listed, those preferred being dithiodiglycol and/or dithiopropanol and their chain extended derivatives e.g. those prepared by reaction with alkylene oxides, aldehydes or ketones or by polyetherification. Of the numerous polyisocyanates listed those exemplified are toluene diisocyanates, and 1,3,6-hexamethylene triisocyanate. The mercaptans exemplified are ethylene dimercaptan and 1,3,5,7,-heptane tetramercaptan. Inert organic solvents such as aliphatic and aromatic hydrocarbons, chlorinated hydrocarbons, chlorinated phenylethers, ketones, ethers, esters, polymeric ethers and siloxane oils may also be used. The reaction products which contain mercaptan groups may be cured by conventional means e.g. by reaction with Sb 2 O 5 .