baber/WOPTO huggingface dataset:
Patent GB-1324174-A (GB)
Title: Switching networks
IPC: H03K17/74
Filed: 1970-10-21
Abstract: 1324174 Gating network; diversity reception WESTERN ELECTRIC CO Inc 21 Oct 1970 [21 Oct 1969] 49928/70 Headings H3P H3T and H4L A switching network comprises a bridge having two pairs of opposite arms interconnecting four nodes, a pair of oppositely poled asymmetrically conducting devices 21, 22; 23, 24; 25, 26 and 27, 28 included in each arm, means 35 operable selectively with respect to either pair of opposite arms for enabling application of forward biasing potential simultaneously to both devices 21, 22 and 25, 26 in each of one pair of opposite arms at a time, and impedance means 30, 31 connected to each of the nodes for developing back bias potential for both devices 23, 24 and 27, 28 in each of the other pair of opposite arms in response to the forward bias being applied. As shown diodes 21, 22 and 25, 26 are biased on to connect input A to output AB and input B to output BA. The switch 35 applies earth to diodes 23, 24 and 27, 28 which are biased off by the potential developed across resistors 31 by current flowing through the diodes 21-26. By changing the switch 35 to position 2 diodes 23, 24 and 27, 28 conduct to connect input B to output AB and input A to output BA and diodes 21, 22 and 25, 26 are non-conducting. Each contact of switch 35 may be replaced by the conduction path of a transistor and a complementary transistor could be included to simultaneously open the path through resistor 33 when a given centre point is grounded to conserve biasing power. The power sources and diodes may be reversed in polarity and the switching device 35 may be a suitable pulse supply. The input and output connections to the bridge may be via coaxial transmission lines. A further bridge circuit (Fig. 3, not shown) may be connected so as to use a common arm (40) of the first bridge circuit so as to increase the switching interconnections. Further bridge circuits may be added so that a new bridge is formed which shares one arm with the previous bridge. Diversity reception.-The changeover switch 13 of Fig. 2, may be used to connect the signal from a receiver (10, Fig. 1, not shown) to output AB and to connect the signal from a receiver (11) to output BA for dissipation in a load 19. If a monitor (18) determines a failure of the signal A from receiver (10) when the signal B from receiver (11) is satisfactory, switch 13 is operated to its second position to connect the signal B to the output (12) and to connect the defective signal A to the load (19).
Patent GB-1349700-A (GB)
Title: Machine tool including broken tool detector means
IPC: G01M99/00
Filed: 1972-10-31
Abstract: 1349700 Punching; gauging W A WHITNEY CORP 31 Oct 1972 [15 Nov 1971] 50129/72 Headings B3W and B3B A tool, such as a punch 13 mounted on a reciprocable ram 11 of a press, has a passage 27 extending almost to the working end 34 of the punch and connected at the other end via a passage 32 through the ram to a supply of pressurized air means, responsive to a change in the preselected pressure in the passage when the passage end 33 is vented on breakage of the tool, producing a signal indicating the breakage. Preferably the pressure change is detected by means of a needle value 25 in the air circuit, between a pressure regulator 23 and the punch, arranged in parallel with a differential pressure switch 26 which produces an electric signal. The signal may cause the press to stop or merely turn on an indicator light. A shut-off valve 36 allows the detector system to be immobilized, e.g. for tool-changing.
Patent GB-1034608-A (GB)
Title: Tranquilizer compositions comprising 2-amino-pyrimidine derivatives
IPC: C07D239/46
Filed: 1964-12-10
Abstract: 2-Aminopyrimidine derivatives of general formula <FORM:1034608/C2/1> where R1 is Cl, Br or CH3; R2 is Cl, CH3, C2H5, O.CH3 or CF3; R3 is H or CH3; R4 is H, CH3, C2H5, n- or iso-C3H7, or cyclopropyl, may be prepared by (a) condensation, followed by ring closure, of an appropriate guanidine derivative with an appropriate reactive methylene compound, e.g. diethyl malonate, ethyl acetoacetate, trifluoroacetylacetone, ethyl propionylacetate, to form the 2-aminopyrimidine derivatives, or the 2-amino-4-(or 4,6)-hydroxypyrimidine derivatives which are converted to the 2-amino-4-(or 4,6)-chloropyrimidine derivatives by treatment with POCl3; or (b) by reacting 2 - ethylmercapto - 4 - hydroxy - 6 - methylpyrimidine under pressure with the appropriate amine, and converting the hydroxy pyrimidine to the chloropyrimidine by means of POCl3; or (c) in the case of 2-amino-4-chloro-6-methoxypyrimidine, by reacting 2-amino-4,6-dichloropyrimidine with sodium methoxide in methanol; or (d), in the case of 2-amino-4-bromo - 6 - methylpyrimidine, by reacting 2-amino - 4 - hydroxy - 6 - methylpyrimidine with POBr3, the product being purified via the picrate salt. Organic and inorganic acid addition salts of the above derivatives may be prepared by conventional methods.ALSO:Pharmaceutical compositions having tranquillizing activity comprise a pyrimidine compound of general formula <FORM:1034608/A5-A6/1> wherein R1 is Cl, Br, or CH3; R2 is Cl, CH3, C2H5, O.CH3, or CF3; R3 is H or CH3; and R4 is H, CH3, C2H5, n, iso, or cyclo-propyl, or a pharmaceutically-acceptable acid addition salt thereof, and a pharmaceutical carrier in dosage unit form.  The carrier may be either solid or liquid and may include a time-delay material.  The compositions may be in the forms of tablets, powders, capsules, troches, lozenges, solutions or suspensions.
Patent GB-978996-A (GB)
Title: Improvements in windscreen wipers
IPC: B60S1/34
Filed: 1963-12-20
Abstract: 978,996. Windscreen wipers. FORD MOTOR CO. Ltd. Dec. 20, 1963 [Jan. 7, 1963], No. 50563/63. Heading A4F. A windscreen wiper arm comprising a socket 18 connected to an oscillatory drive shaft 17 and a member 16 carrying a wiper blade pivoted at 30 to the socket for movement towards and away from the screen is characterized in that the pivot axis is adjustable to move the wiper blade nearer to the windscreen edge when the wiper arm is in its parked position. The shaft 17 has a knurled head the knurls being spaced at 4¢ degree intervals and the socket is internally knurled to fit the shaft. The pivotal connection at 30 comprises a bolt 31 extending through bushing 33 in the socket and holes 36 and 42 in the yokeshaped end of the member 16, the bolt being held in position by a nut 32. Cams 45 and 46 on the bolt engage the holes 36 and 42 respectively. To adjust the arm the nut 32 is unscrewed and the bolt rotated to change the pivot axis whereby the position of the member 16 relative to the socket 18 is changed.
Patent GB-1490173-A (GB)
Title: Wall decorations
IPC: D21H27/20
Filed: 1975-12-10
Abstract: 1490173 Laminates SEIBU POLYMER KASEI KK 10 Dec 1975 [11 Dec 1974] 50702/75 Heading B5N A wall decorating material comprises a sheet of paper, a plurality of areas of adhesive synthetic resin applied to one side of the sheet at appropriate intervals and a coarse-woven cloth, e.g. Victoria lawn made from staple fibre or flax, adherent to the areas of synthetic resin. The resin, e.g. molten polyvinyl chloride or acrylic resin emulsion, may be applied to the paper sheet as zig-zag lines, stripes or dots and the paper then heated by passage through a heating furnace to gel the resin after placing the cloth thereon. The paper and cloth may then be pressed together by passage through printing and/or embossing rolls.
Patent GB-1282739-A (GB)
Title: Automatic detection of rail vehicles having defects likely to lead to their derailment
Inventor: HANCOCK ROBERT MICHAEL
IPC: G01G19/04
Filed: 1969-10-16
Abstract: 1282739 Track apparatus BRITISH RAILWAYS BOARD 13 Oct 1970 [16 Oct 1969] 50845/69 Heading B7N [Also in Division G1] The "derailment potential" of railway vehicles is determined by simultaneously sensing the individual loading of each wheel of a pair having a common axis and comparing the ratio of the wheel loadings with a predetermined ratio. An alarm may be activated if the predetermined ratio is exceeded, and an axle counter may be used to identify the unevenly loaded axle. The sensing means may be strain gauge bridge circuits on the track webs or strain gauge load cells under a sleeper. The track leading up to them should be adjusted for line, cross-level and top, for about seven chains. Each sensing means preferably produces two identical output signals, one of which is recorded (Fig. 2, not shown) and the other of which goes to the ratio determining means. An alarm may be operated if the signals fail to reach a predetermined level. The apparatus is calibrated by passing a train of varying axle loads over the test site. A mathematical analysis is given.
Patent GB-1152540-A (GB)
Title: Process for the Manufacture of Dispersions
IPC: C08F2/22
Filed: 1967-11-08
Abstract: 1,152,540. Aqueous emulsion polymerization. FARBWERKE HOECHST A.G. 8 Nov., 1967 [8 Nov., 1966], No. 50870/67. Heading C3P. An aqueous dispersion of a polymer is prepared by emulsion-polymerization of a vinyl ester, an ester of acrylic acid, an ester of methacrylic acid or more than one such unsaturated ester, if necessary or desired with one or more other olefinically unsaturated monomers in the presence of a water-soluble free radical polymerization catalyst, the polymerization being carried out in the presence of at least one lightsensitive, non-ionic, water-soluble, emulsifier having the general formula in which R represents a methyl group, a phenyl group or a phenyl group substituted in the meta- or para-position by a linear or branched chain alkyl group containing 1 to 18 carbon atoms, n represents an integer within the range of 1 to 200, and if necessary or desired in the presence of one or more other emulsifiers and/or one or more protective colloids. Examples describe the copolymerization of vinyl acetate and vinyl ester of a mixture of aliphatic carboxylic acids branched in a-position and containing 9 to 11 carbon atoms in the presence of hydroxyethylation products of parahydroxybenzophenone with ethylene oxide, where n=14 and 30, the sodium salt of vinyl sulphonic acid, sodium acetate, poly-N-vinyl-2-pyrrolidone and potassium persulphate. Films made from the dispersion were cross-linked by radiation. The films may be pigmented with TiO 2 , BaSO 4 , talcum and chalk.
Patent GB-1091888-A (GB)
Title: Parking device, more particularly for motor vehicles
IPC: E04H6/18
Filed: 1964-12-14
Abstract: 1,091,888. Mechanical garages; garage lifts. R. DARMSTADT. Dec. 14, 1964 [Dec. 13, 1963; May 2, 1964], No. 50900/64. Headings B8E and B8H. [Also in Division E1] A parking device comprises three platforms O, M, U, Fig. 1, which are mounted for vertical movement relative to a main frame 1 with the platform O vertically movable relative to the platform M, U so that any one platform may be moved to and from a loading level intermediate the height of the device. Extending from the frame 1 are four columns 3 ... 6 in which are housed threaded spindles 19 ... 22, the latter being engaged by nuts 30, Fig. 2 (not shown), rotatably secured to the platforms and drivably connected to a motor 38, Fig. 3 (not shown); the pitch of the thread is such as to give a selfbraking effect. The device is controlled from a switch box 40, Fig. 4 (not shown), the operation of a garage door or barrier being effected by hand or in association with safety relays. A plurality of the devices P are incorporated in a multi-storey garage, Figs. 11 to 13 (not shown), the access to the storeys being by twin up and down helical ramps 63, 64, the centre axes of which are spaced; the ramps are of different hand and adjacent parts thereof which are at the same level at each storey provide entrances and exits 73, 74. In the centre of the ramps there may be passenger lifts or staircases. Additional parking devices S, H are provided in which platforms are respectively lowered and raised to the levels of the floors of the garage. In a modification, Fig. 14 (not shown), the garage has two adjacent but laterally spaced helical ramps. In other modifications, the platforms may be moved hydraulically, e.g. from a central hydraulic plant comprising an accumulator or by hand and they may carry more than one vehicle. The vehicles may be moved laterally on to the platforms with the aid of additional devices.
Patent GB-1355579-A (GB)
Title: Machines for cutting panels or parts thereof
Inventor: KUTASSI P
IPC: B23D45/02
Filed: 1971-11-02
Abstract: 1355579 Panel sawing machine F MEYER & SCHWABEDISSEN 2 Nov 1971 [13 Jan 1971] 50925/71 Heading B5L A panel-cutting machine comprises endless conveyer means 2 extending lengthwise of the machine, a work-table divided transversely into first and second parts 3, 4, each of which is movable relative to the other in a heightwise direction between a first position below the upper run of the conveyer means, and a second position above the conveyer means, and saw means mounted for movement above the worktable for cutting a panel or panels positioned on the work-table. As described the conveyer means is a plurality of spaced parallel endless belts between which are located portions of the work-table parts 3, 4. Panels fed by the belts 2 whilst the work-table parts are in their first positions are located by stops 5, and are fastened to the work-table parts 3, 4, after raising the latter, by clamps 7, 8. The saw means comprises longitudinal and cross-cut saws 10 and 11 respectively mounted on a carriage 9 which is movable longitudinally of the machine to locate the saws in the desired positions relative to the panels. The panels are held by a clamping bar 12 during operation of the saw 11.  The machine may be operated to cut the panels into smaller panels of various sizes. Pieces cut from the leading edges of the panels by saw 11 may be fed out of the machine by the belts 2 after lowering the table part 4 whilst the remainder of the panels are held on the part 3. Alternatively pieces cut by the saw 11 may merely be fed up against stops 6 so as to space them from the remaining pieces and so enable them to be cut by saw 10 along different lines to the remaining pieces.
Patent GB-1447998-A (GB)
Title: Current supply circuit
IPC: H01L21/822
Filed: 1973-11-02
Abstract: 1447998 Automatic current control ITT INDUSTRIES Inc 2 Nov 1973 [18 Nov 1972]  51021/73 Heading G3R A circuit for supplying constant current to an integrated circuit comprises a series supply transistor with its collector connected to the emitter of a multi-collector current distribution transistor. The current in one collector of the distribution transistor is compared with a reference value in a regulating circuit which provides a control signal to the base of the supply transistor. The reference value is derived from the base-emitter threshold voltage of at least one transistor. As shown in Fig. 1, transistors T1, T2 are connected in series across a dry cell battery supply voltage U B . Transistor T2 is of the multi-collector type, and a resistor R senses the current in one of the collectors and provides a control signal through a regulating amplifier V to the base of supply transistor T1 in order to keep constant the currents in each of the collector circuits of transistor T2. The other collectors may be connected to various stages of an integrated circuit containing an oscillator and frequency divider driving an electro-mechanical transducer. The voltage at the base of transistor T2 is fixed by a constant voltage device B, which may be one or more diodes, a Zener diode or a transistor. The amplifier V may use the baseemitter voltage of one or more transistors as a reference value, and additional transistors or groups of transistors may be connected with base-emitter paths in parallel with those of transistors T1, T2, Figs. 2-6 (not shown).
Patent GB-1415865-A (GB)
Title: Oxidation of butane to maleic anhydride
IPC: C07D307/60
Filed: 1972-11-06
Abstract: 1415865 Maleic anhydride CHEM SYSTEMS Inc 6 Nov 1972 [3 Jan 1972 27 Oct 1972] 51075/72 Heading C2C Maleic anhydride is obtained by contacting a feedstock containing at least 50% by volume of its hydrocarbon content as n-butane and a gas containing molecular oxygen in the vapour phase with a catalyst complex containing phosphorus, vanadium, oxygen and a zinc, copper, bismuth or lithium metal activator, said catalyst complex containing from 0À5 to 5 atoms of phosphorus for each atom of vanadium and from 0À05 to 0À5 metal atoms of said activator for each atom of vanadium. The reaction is suitably carried out at a temperature of 300- 650‹ C. with a contact time of 0À05-5 seconds. The catalyst may be supported on an inert carrier and a fixed or fluidized catalyst bed may be employed. When a fixed bed catalyst is employed the feedstock preferably contains 0À1 -4 mole per cent butane; when a fluidized catalyst bed is used the feedstock preferably contains 1-20 mole per cent butane. The hydrocarbon feed mixture may be pure butane, or butane-isobutane, butane-butene or butanebutadiene mixtures or combinations thereof.
Patent GB-1236157-A (GB)
Title: Improvements in or relating to impatt diodes
IPC: H01L29/866
Filed: 1969-10-17
Abstract: 1,236,157. Semi-conductor devices. FUJITSU Ltd. 17 Oct., 1969 [17 Oct., 1968], No. 51219/69. Heading H1K. An IMPATT diode comprises a high resistivity epitaxial layer of one conductivity type on the surface of a low resistivity substrate of the opposite conductivity type, a diffused region of said opposite conductivity type extending through the epitaxial layer, and a diffused region of said one conductivity type extending across the first diffused region at the surface of the epitaxial layer to define an active junction area between the two diffused regions having a lower breakdown voltage than the junction area between the epitaxial layer and the substrate. As shown Fig. 1, a P type Si epitaxial layer 2 doped with B is deposited on an N<SP>+</SP>type substrate 1 doped with Sb. P is diffused-in to form N type region 3 and B is then diffused-in to form a P type region 4. The resulting junction ABCDEF has a lower breakdown voltage over the active region CD than over the regions AB and DF so that the avalanche occurs in the centre of the device. The edge of the wafer may be provided with a protective layer (not shown) e.g. of silicon oxide, to passivate the junction. The active part of the structure may have a P<SP>+</SP>NN<SP>+</SP> or P<SP>+</SP>NIN<SP>+</SP> structure depending on the impurity concentration profile. N<SP>+</SP>PP<SP>+</SP> and N<SP>+</SP>PIP<SP>+</SP> structures may also be produced and the semi-conductor material used may be Ge or a III-V compound such as GaAs instead of Si. The diode (10) may be inverted and mounted with the surface of the epitaxial layer (2) in contact with a pedestal on a gold-plated copper heat sink (5) so that the heat generated at junction part CD is readily dissipated Fig. 2 (not shown). The pedestal and diode are surrounded by a ceramic tube (7) secured to the heat sink (5) and closed with a metal disc 9 to which the substrate (1) of the diode is connected by means of a gold ribbon lead (11).
Patent GB-1316286-A (GB)
Title: Device for spraying electrified powdered materials for the coating or surface treatment of various parts
IPC: B05B15/12
Filed: 1970-10-29
Abstract: 1316286 Spray producers SOC CARRIER SA 29 Oct 1970 [4 Nov 1969] 51579/70 Heading B2F In the electrostatic spraying of articles with a mixture of powder and air the articles are passed through a chamber 1 on a carrier, the chamber being at a lower pressure than its surroundings, the carrier passing through lockchambers 2 and in front of at least one spraying device 18, this being supplied with powder and air from a feeding tank 4 having a dosimeter-mixer 9 therein, supplied with compressed air from a pipe 16, and also having means 7 to ensure the recycling of powder not deposited on the sprayed articles, the spraying device having a dividing element 21 (Fig. 2) in the slot from which the material is sprayed. As shown the spraying device 18 comprises a vertical tube which is supplied with the powder-air mixture through a homogenizing tube 17, the dividing member 21 consisting here of a plate with grooves or notches 22, 23 on alternate sides thereof, these defining individual spray orifices, the electrostatic charging being by a wire 26 (Fig. 1) connected to a voltage supply 29, although this may optionally be directly connected to dividing element 21 if this is of metal and the tube in which it is mounted is of insulating material. A flap 18 1  at the top of the tube controls the pressure therein to prevent the spraying being at too great a pressure. The pressure in the chamber 1 is reduced through pipe 30. The dosimetermixer 9 has at the end 12 of a tube 10, a shutter flap 13, this being moveable (through member 14 and control 15) to vary the degree of suction caused by the air supplied through pipe 16 and so to vary the amount of spray material supplied to the spraying device. Alternative dividing members may be incorporated in the spray device 18, these consisting of a member with teeth defining the orifices, these varying in size along the length of the device 18 to ensure uniform spraying along the length of the device (Fig. 4, not shown) and a strip or wire which is corrugated to define the orifices, the corrugations similarly of varying sizes (Fig. 5, not shown). As an alternative to the supply and recirculation device shown for the powder-air mixture, a fluidized bed may be used (Fig. 6, not shown), a vibrator connected to a filter connected to the bottom of the chamber by a pipe controlling the supply of powder to the bed, this being on a mesh screen over a chamber supplied with air for the fluidization of the bed, the material being drawn from the bed through an ejector. An embodiment with two spraying devices positioned to spray both sides of the articles is also described.
Patent GB-1030217-A (GB)
Title: A process for thermally stabilizing images produced in layers of photochromic material by ultra-violet irradiation
IPC: G03C1/685
Filed: 1964-12-21
Abstract: 1,030,217. Photographic processes using photochromic materials. NATIONAL CASH REGISTER CO. Dec. 21, 1964 [Jan. 16, 1964], No. 51792/64. Heading G2C. Thermally stabilized images are produced in a layer of one or more non-crystalline, photochromic spiropyran compounds by imagewise exposing the material to ultra-violet radiation and treating the layer before or after exposure with a hydrogen halide or sulphur dioxide vapour to form an acid complex. Preferably the imaged layer is heated to drive off the acid vapour from the non-image areas. The yellow image may be converted to a blue image by treating the layer with alkali but if the layer, is then re-exposed to a different image and treated with acid vapour two yellow images are produced. Multi-colour images may be produced by image-wise exposing a benzoindolinospiropyran to ultra-violet and treating with hydrochloric acid vapour, removing the background areas with toluene, recoating with a different spiropyran, image-wise exposing and treating with hydrogen chloride and then with ammonia to give one purple and one blue image. The layer may be exposed to hydrogen halide vapours before or after image-wise exposure but to sulphur dioxide vapours only after image-wise exposure.
Patent GB-1134888-A (GB)
Title: Cured polymer and method of preparing same
IPC: C08G73/24
Filed: 1965-12-08
Abstract: 1,134,888. Cross - linking fluoronitrosoalkane polymers. UNITED STATES OF AMERICA, ARMY SECRETARY OF. 8 Dec., 1965 [8 Dec., 1964], No. 52038/65. Heading C3P. A copolymer of a fluorine-containing nitrosoalkane, a fluorine-containing olefin, and a monomer providing pendant carboxylic acid groups is cured by reacting it with a chromium salt that forms Wemer-type complexes. Suitable polymers are from trifluoronitroso methane, tetrafluoroethylene, or trifluorochloroethylene, and omega-nitroso-perfluorobutyric acid. Suitable salts include chromic acetate and chromium triperfluoroacetate.