baber/WOPTO huggingface dataset:
Patent GB-538273-A (GB)
Title: Improvements in or relating to films for reducing or altering surface reflection from light-transmitting and other articles
IPC: G02B1/11
Filed: 1939-12-22
Abstract: 538,273. Altering and reducing surface reflection. BRITISH SCIENTIFIC INSTRUMENT RESEARCH ASSOCIATION Dec. 22, 1939, No. 32794 Convention date, March 20, 1939. [Class 97 (i)] Films altering or reducing, by interference effects, the reflection from a surface are formed by successively evaporating on to the surface dissimilar light-transmitting materials having different indices of refraction ; a layer a few molecules thick may be first applied to the surface to increase adhesion of the film. The thicknesses of the film may be controlled by use of a " crossed wedge " formed by evaporating one substance on to a glass plate inclined to a line joining the heater and the plate, so as to produce a deposit of gradually changing thickness in one direction, and then turning the plate through 90 degrees in its own plane and evaporating the second substance on to it to produce a deposit having a thickness gradually changing in a direction at right angles to the direction of change of the first deposit. The thicknesses necessary to produce the desired reflecting power are determined by the " crossed wedge," and deposition may be controlled photometrically during the evaporations on to the surface to be treated. The surface may be first coated with a chromium layer a few molecules thick which is oxidized by exposure to air and increases the adhesion of the film ; a film of aluminium oxide slightly thicker than quarter of a selected wavelength may then be produced by evaporation, and a film of quartz having a thickness a little less than the quarter wavelength may be produced thereon by. further evaporation. Such a film produces a reduced reflectivity in the spectral region to which the eye is most sensitive. Examples of other combinations of substances are given in the Specification, of which one produces selective increased reflectivity, and all are sufficiently rugged to withstand vigorous brushing with a soft brush. Ruggedness may be increased by baking the films.
Patent GB-946101-A (GB)
Title: Apparatus for guiding irregular surfaced paper to cutting machines
IPC: B44C7/02
Filed: 1959-09-26
Abstract: 946,101. Feeding webs. D.E.K. GRANT. Aug. 22, 1960 [Sept. 26, 1959], No. 32808/59. Heading B6B. A web is guided transversely by passage across a table 1 provided with a spring-pressed bar 4 and a longitudinally slotted spring- loaded slideway 8 provided with adjustable projections 17 which engage the web and prevent lateral deviation thereof. The spring loading of the bar 4 and slideway 8 enable them to rise and fall according to the nature of the paper surface.
Patent GB-500898-A (GB)
Title: Improvements in electric selective switching systems
IPC: H04Q3/00
Filed: 1937-11-27
Abstract: 500,898. Automatic exchange systems. SIEMENS BROS. & CO., Ltd., and PATTERSON, W. G. Nov. 27, 1937, No. 32811. Drawings to Specification. [Class 40 (iv)]  In a hunting switch in which the test relay is of low resistance while the marking potential is fed through a high resistance, the relay upon operation closes a holding circuit over a second winding to guard against the shunting effect of a similar test relay in another switch. A bidirectional finder is described which is identical with that described in Specification 500,891. Specification 405,436, [Group XXXVII], also is referred to.
Patent GB-423888-A (GB)
Title: Improvements in washing machines
IPC: D06F17/12
Filed: 1933-11-24
Abstract: 423,888. Washing-machines. BURSLEM, R., Saskatoon, Woodheys Drive, Ashton-on- Mersey. Nov. 24, 1933, No. 32831. Addition to 411,167. [Class 138 (ii)] In place of the fan for delivering compressed air beneath the perforated false bottom of the machine described in the parent Specification there is provided a member C having a semi-tubular central portion C<111> into which the supply pipe B discharges through a converging and rounded portion C<1>, and an enlarged semi-spherical portion C" positioned beneath a conical depression d<1> in the perforated false bottom D<1>.
Patent GB-764875-A (GB)
Title: Commutators
Inventor: VAUGHAN MONTAGUE
IPC: H01R39/02
Filed: 1954-11-12
Abstract: 764,875. Metallic powders. MORGAN CRUCIBLE CO., Ltd. Nov. 8, 1955 [Nov. 12, 1954], No. 32865/54. Class 83 (4). [Also in Group XXXV] Iron or steel commutator segments la are faced with a working layer of sintered copper or copper alloy, by assembling them into a strip with wedge-shaped carbon spacers 8 and applying a strip 11 of the cuprous material to the previously copper or nickel-plated top surfaces of the segments. Pressure of ten tons per square inch is applied between plates 10, 12 and the temperature is raised to 800 ‹ C. in a reducing or inert atmosphere. After sintering, the segments are separated. Specification 719,636 is referred to.
Patent GB-885485-A (GB)
Title: Improvements in the manufacture of ceramic industrial articles
IPC: C23C4/18
Filed: 1958-10-15
Abstract: Metal bodies are sprayed with refractory material, the surface of the refractory material is subjected to any necessary mechanical finishing treatment, and an epoxy resin is then applied thereto.  The expression "refractory material" is limited to aluminium oxide, zirconium oxides, mixtures of these, and silicon carbide.  When the body is of ferrous metal it may first be sprayed with nickel; the refractory material may then be applied by a flame-spraying device, and finally a stick of epoxy resin may be rubbed over the heated surface.  The body may then be heated to cure the resin.  Examples are given of coating a steel roller, and the grooves in a steel garniture block for a cigarette-making machine.  Specifications 629,853, 767,564 and 771,031 are referred to.ALSO:Metal bodies are sprayed with refractory material, the surface of the refractory material is subjected to any necessary mechanical finishing treatment, and an epoxy resin is then applied thereto.  The expression "refractory material" is limited to aluminium oxide, zirconium oxides, mixtures of these, and silicon carbide.  When the body is of ferrous metal it may first be sprayed with nickel; the refractory material may then be applied by a flame-spraying device, and finally a stick of epoxy resin may be rubbed over the heated surface.  The body may then be heated to cure the resin.  An example is given of coating the tape-receiving groove in a steel garniture block for a cigarette-making machine.  Specifications 629,853, 767,564 and 771,031 are referred to.
Patent GB-1035777-A (GB)
Title: Isoquinoline derivatives
Inventor: PESSON MARCEL
IPC: C07D217/24
Filed: 1963-08-20
Abstract: Compounds of the general formula <FORM:1035777/C2/1> (wherein R represents a straight or branched alkyl radical having at most four carbon atoms, or an aryl or aralkyl radical, and R1 represents a hydrogen atom, a straight or branched alkyl radical having at most four carbon atoms, or an aryl or aralkyl radical) and their acid addition salts are prepared by reacting a compound of the formula <FORM:1035777/C2/2> with a large excess of hydrazine or hydrazine hydrate in the absence of a further solvent, optionally followed by salt formation, and may be converted to compounds of the general formula <FORM:1035777/C2/3> and their acid addition salts by hydrogenation in the presence of Raney nickel, optionally followed by salt formation.  The preparation of a number of 1-chloroisoquinoline starting materials and of the hydrazone obtained by reacting benzaldehyde with 1-hydrazino - 4 - ethoxyisoquinoline is described. The hydrazino and amino compounds of the invention and their salts are coronary dilators and hypotensive agents, some are vasodilators and some are vasoconstrictors.  They may be administered in the form of pharmaceutical preparations containing them in association with a carrier.
Patent GB-325218-A (GB)
Title: Improvements in advertising and displaying devices
IPC: G09F23/00
Filed: 1928-11-12
Abstract: 325,218. Holophane, Ltd., Williams, R. G., and Hudson, G. J. Samms-. Nov. 12, 1928. Lantern screens.-A light projector for illuminating with varying colours, posters or other objects comprises a vertical translucent cylinder 17 having inclined bands of different colour thereon and supported upon a stationary vertical reflector 9 which encloses the light source 6 except for an aperture or apertures 10 through which the light passes. The cylinder 17 rotates outside the reflector 9 by convection currents impinging on vanes 21. A sheet of prismatic glass 26, a diffusing medium, and a colour screen may be arranged in the path of the light rays. Two or more projectors may be coupled together by gearing.
Patent GB-929621-A (GB)
Title: Improvements in and relating to engine fuel supply control arrangements for motor vehicles
Inventor: NOTT RICHARD KEITH
IPC: B60W30/18
Filed: 1959-09-30
Abstract: 929,621. Transistor switching circuits. SELF CHANGING GEARS Ltd. Sept. 30, 1960 [Sept. 30, 1959], No. 33188/59. Class 40 (6). [Also in Group XXIV] In a relay control for automatic closure of a motor vehicle engine throttle during upward gear changes, an input pulse at 16 operates flipflop circuit T1, T2, the trailing edge of the resulting output at 23 being selected by a diode 8 to produce a delayed output pulse. This is applied to a further flip-flop circuit T3, T4 to operate a relay 9 for a predetermined time. Alternatively, operating pulses may be applied at terminals 31 and 34.
Patent GB-623766-A (GB)
Title: Improvements in electron discharge devices and particularly magnetrons
IPC: H01J25/587
Filed: 1946-11-08
Abstract: 623,766. Magnetrons. WESTERN ELECTRIC CO., Inc. Nov. 8, 1946, No. 33284. Convention date, Feb. 12. [Class 39 (i)] [Also in Group XL (b)] The anode of a cavity magnetron has a wave-guide leading to one of the cavities; the wave-guide is defined by a slot leading into the cavity and by recesses at the top and bottom of the anode block, the slot intersecting the recesses at right angles. Fig. 6 shows an exploded view of an anode. The main anode block 10 contains the resonant cavities 12 which may be alternately coupled by anode straps 15, 16. The block 10 is provided also with a slot 17 extending to one of the cavities and with a pair of recesses 18, one on each face, which extend to the central recesses 14 above and below the resonators. The blocks 19, 20 are sealed to 10, as by brazing, thus defining an H-section wave-guide, of which the recesses 18 form the limbs and the slot 17 the cross-piece, communicating with one of the resonant cavities. This wave-guide is a quarter wavelength long. Fig. 2 shows a cross-section of the complete magnetron; it can be seen that the H-section wave-guide leads into a rectangular wave-guide 53 which is hermetically sealed by a cup member 54 containing a circular window 55 of glass transparent to the frequencies used. A coupling flange 57 is provided for connection to an external wave-guide; the coupling 57 and the guide 53 are provided with opposed annular slots 60, 61 to form choke joints which minimize power losses at the junction. The hollow polepieces 27 of the magnet fit into the apertures in the anode blocks 19, 20. One of the polepieces is sealed by the exhaust tube 29 and the other carries the indirectly heated cathode which is shown in detail in Fig. 3. The cathode tube 30 may bo of nickel or molybdenum and has an emissive coating 34 ; it carries two magnetic collars 39 and is attached to the support 32 by a sleeve 33. The sleeve 33 and heat radiator 40 may be of copper coated with zirconium. The anode is provided with cooling pins 26 which fit into the slots 25 cut in the blocks 19, 10, 20 on three sides. Specification 586,430 is referred to.
Patent GB-1508815-A (GB)
Title: Electronic timepiece
IPC: G01R31/36
Filed: 1975-08-11
Abstract: 1508815 Electronic timepieces SUWA SEIKOSHA K K 11 Aug 1975 [30 Aug 1974] 33390/75 Heading G3T [Also in Division G1] An electronic timepiece has a battery voltage level detecting circuit including a field effect transistor 2, Fig 1, manufactured so that the temperature coefficient of its drain current ID is zero or substantially zero when the battery voltage is within a voltage range between the maximum voltage produced by the battery and a predetermined voltage (e.g. between 1À58V and 1À50V). Erratic operation of the detecting circuit due to temperature change, is thereby avoided. In Fig. 1, the transistor 2 is conductive when E 1  exceeds its threshold voltage VTH (e.g. ¢E 1  max), so that load voltage E 2  will be substantially equal to E 1 . When El falls towards VTH, the voltage E2 which is proportional to drain current I D , will fall rapidly as transistor 2 goes to the non- conductive state; when E 1  is smaller than VTH the voltage E 2  will be substantially zero. When E 1  falls to a predetermined value (90-- 95% of E 1  max.) referred to as the "detecting voltage", the voltage E2 is substantially at the threshold voltage of an inverter 4 and as it falls below this value, there results an inversion of a signal at an output terminal 6 from an inverter 5, which inversion is used to indicate that the battery should be replaced. In an alternative embodiment, Fig. 7 (not shown), the gate of 2 is connected to an intermediate point on a voltage divider and its load resistor is adjustable. The P-MOSFET 2 and the inverters 4, 5 are formed on the same substrate. The timepiece may include a crystal controlled oscillator, frequency divider and liquid crystal time display.
Patent GB-1476139-A (GB)
Title: Video-recording
IPC: G11B15/467
Filed: 1974-07-29
Abstract: 1476139 Automatic speed control systems PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 29 July 1974 [1 Aug 1973] 33431/74 Heading G3R [Also in Division G5] The speed control of a video recorder drive is modified when starting a new recording so as to achieve minimal disturbance, on playback, between pre-recorded signals and the new recording. The actual and reference drive speed signals for the control 5 are obtained, in the recording mode, respectively from a tachometer 6 in the drive and from the vertical synchronizing signals 16 to be recorded. In the playback mode, the actual and measured speed signals are obtained from a reference source and from a scanning at 7 of a synchronising track 8 on the recording medium, e.g. tape 2. The tachometer 6 consists of a closed magnetizable track 21 co-operating with an equal number of equidistantly spaced magnetic heads 22 to 25 that are connected to a D.C. voltage in the playback mode, so as to magnetize the track 21, and in the recording mode one of the heads scans the track 21 to form the measured speed signal in this mode. Upon initiation of a new recording, the magnetic heads 22 to 25 are disconnected from the D.C. voltage and the system changed from the playback mode, using vertical synchronizing signals as the reference signals, to the recording mode using the next pulse from the synchronizing track 8. In the embodiment shown, the signals to be recorded on the synchronizing track 8, in the recording mode, are obtained from the vertical synchronizing signals to be recorded, or from the mains supply. For a new recording, the system may be modified as Fig. 2 (not shown) where the tachometer output, instead of the vertical synchronizing signals, is recorded on the synchronizing track 8. Alternatively, the tachometer output may be recorded on the synchronizing track for all recording modes as Fig. 3 (also not shown). After initiation by switch 29, the switching from playback to recording mode for a new recording, and the disconnection of the magnetic heads, is carried out using the next pulse from the synchronizing track by switch 31 which includes a bi-stable multi-vibrator. If no synchronizing pulses are recorded on the synchronizing track, a switching pulse may be obtained from a timing circuit (44) that is started when switch 29 is pressed. The speed servo 5, which uses signals from tachometer 6 or the synchronizing track 8 that have a frequency dependent upon the tape drive speed, may control the speed by an eddy current brake.
Patent GB-492647-A (GB)
Title: Apparatus for the production of ozone
IPC: C01B13/11
Filed: 1937-03-23
Abstract: 492,647. Ozone apparatus. SUTTON, F. C., and BROWNE, R. J. March 23, 1937, No. 33582/36. [Class 39 (i)] Apparatus for the production of ozone comprises electrodes in the form of hollow polygonal prisms arranged adjacent to each other so as to form a cellular structure, the electrodes being connected to sources of potential so that each electrode has at least one adjacent electrode, from which it is insulated, at a different potential. In the construction shown, the ozonizing chamber consists of a number of hexagonal tubes of dielectric material 14, lined with perforated aluminium electrodes 4, 5<1> and an outer electrode 3. The central and outer electrodes 4, 3 are connected to one terminal of a source of high potential and the ring of electrodes, which are electrically connected to each other by bolts 15, to the other terminal. Where a large number of tubes are used, the outer electrode may be dispensed with. The dielectric material may be micanite, silica or chlorinated naphthalene of high melting point. Preferably the air is introduced at a velocity which sets up and maintains turbulence in the ozonizing chamber.
Patent GB-1524364-A (GB)
Title: Tyre tread
IPC: B60C11/12
Filed: 1975-08-13
Abstract: 1524364 Tyre treads DUNLOP Ltd 13 Aug 1975 [27 Aug 1974] 33676/75 Heading B7C A tyre tread shown schematically in Fig. 1 comprises a plurality of blocks arranged in rows 5, 6, 7, 8 which extend in the longitudinal direction of the tread, said blocks when considered in plan view each comprising a rectangular part and an adjoining trapezoidal part, a longer side of the rectangular part of the blocks in the row 8 lying alternately transversely to and parallel to the longitudinal direction.
Patent GB-780792-A (GB)
Title: Improvements in or relating to processes for the production of slag wool
IPC: C03B37/06
Filed: 1955-11-29
Abstract: 780,792. Slag wool. MANNESMANN AKT.- GES. Nov. 29, 1955 [Dec. 2, 1954; Oct. 5, 1955], No. 34156/55. Class 56. In the production of slag wool the stream 2 of the wool, produced by an atomising device 1, is divided into upper and lower parts 2a, 2b, such that the upper part contains substantially only wool whilst the lower part contains all the beads &c. The division may be effected as by a wall 6 and/or by a suction fan or blower. The material in the lower part may be passed through separators 4 and the wool thus freed from the beads may then be passed through ducts 5 to the collector 3. Separation into the two parts may also be effected electrostatically.
Patent GB-1167398-A (GB)
Title: Resistance Thermometer Circuit
IPC: G01K7/20
Filed: 1967-07-25
Abstract: 1,167,398. Measuring temperature electrically; measuring bridge circuits. WESTINGHOUSE ELECTRIC CORP. July 25, 1967 [Oct.12, 1966], No. 34159/67. Headings G1N and G1U. A D.C. resistance bridge 12 Fig.1 for measuring temperature using a temperature sensitive resistor 40, has its unbalance voltage fed to an amplifier 50 whose output current I o  is fed through a shunt circuit including a resistor 44 in one branch of the bridge, whereby a change in temperature changes the input voltage and output current of amplifier 50 until a balanced condition is restored, and the output current I o  is them proportional to the value of resistor 40 and the temperature it is sensing.
Patent GB-846949-A (GB)
Title: New metalliferous monoazo dyestuffs containing halogenotriazinylamino groups
Inventor: VELLINS CYRIL ERIC
IPC: C09B62/095
Filed: 1957-11-04
Abstract: The invention comprises water-soluble metalliferous monoazo dyes, which in the form of the free acids are of formula:  <FORM:0846949/IV (c)/1> wherein A is an o-phenylene group optionally substituted by chlorine, nitro, alkoxy, alkyl sulphone, sulphamyl, carboxylic acid or sulphonic acid, X is -O- or -CO-O- and Y is an amino or methoxy group or an anilino group containing at least one sulphonic acid group.  The dyes may be obtained by reacting cyanuric chloride with an equimolecular proportion of an appropriate aminoazo dye or copper complex thereof followed by reaction with a molecular proportion of methanol, ammonia or a sulphoaniline and after-coppering if necessary.  Methods employing other reaction sequences are specified. A number of components used in the preparation of the aminoazo dyes are specified.  The dyes are used to colour nitrogenous and cellulose textile materials, if desired in conjunction with an alkaline agent. They dye cellulose in red, blue and brown shades.  In an example, Metanilic acid is condensed with the trisodium salt of the copper complex of 2-(21 : 41-dichloro-s-triazinylamino) - 6 - (211 - hydroxyphenylazo) - 5 - naphthol -1 : 511 : 7-trisulphonic acid, which is obtained by coppering the aminoazo dye 2-aminophenol -4- sulphonic acid --> 2 -amino -5-naphthol -1:7 - disulphonic acid and reacting with cyanuric chloride.  Further dyes are specified wherein the metanilic acid may be replaced by orthanilic, sulphanilic or aniline -2 : 5- disulphonic acid, methanol or ammonia and the 2-aminophenol -4- sulphonic acid by 4-chloro- or 4 : 5 dichloro -2- aminophenol, -6- sulphonic acid, 5-nitro -2- aminophenol, 4- or 5-sulpho -2-aminobenzoic acid and 3-nitro -2- aminobenzoic acid.  The Provisional Specification also describes water-soluble copper and nickel complexes of monoazo dyes which contain, linked through a nitrogen atom, an s-triazine group substituted by a halogen atom and by a substituent containing at most 13 carbon atoms.  The dyes are prepared by the methods described above.  The substituents on the triazine ring may be e.g. alkyl, cycloalkyl, aryl or heterocyclic linked directly or preferably through a nitrogen, oxygen or sulphur atom.  Many compounds capable of giving such groups, or to be used in the preparation of the intermediate aminoazo dyes, are specified. The properties and uses of the dyes are similar to those described above.  In examples the copper complexes of the dyes 2-aminophenol -4- ethyl sulphone --> 1-amino -8- naphthol -3 : 6-disulphonic acid and 6-chloro -2- aminophenol -4- sulphonic acid --> 1-amino -8- naphthol -3 : 6- disulphonic acid are reacted (1) with equimolecular proportions of 2- methoxy- or -phenoxy -4 : 6- dichloro -striazine and (2) with an equimolecular proportion of cyanuric chloride, followed by reaction with an equimolecular proportion of metanilic acid, aniline or ammonia.  Specification 797,946 is referred to.
Patent GB-1041040-A (GB)
Title: Process for the stepwise hardening of mixtures of unsaturated polyesters and copolymerisable monomers
IPC: C08F283/01
Filed: 1965-08-11
Abstract: In a process for the stepwise production of moulded articles from moulding masses of unsaturated polyesters and copolymerizable monomeric compounds with a content of polymerization catalysts and gellers and optionally of fillers, there are used as polymerization catalysts 1,2-substituted ethane derivatives <FORM:1041040/C3/1> in which R1 and R3, which may be the same or different, are aromatic radicals, R2 is a hydrogen atom or an aliphatic or aromatic radical, R4 is an aliphatic or aromatic radical and X and Y, which may be the same or different, are optionally blocked hydroxyl groups and/or optionally substituted amino groups and/or halogen atoms.  Catalysts mentioned are benzpinacone compounds; acetophenone-, xanthone- and fluorenone - pinacone compounds; 1,2 - di - (3-pyridyl) - 1,2 - diphenyl - ethane - 1,2 - diol; 1,2 - dichlorotetraphenyl - ethane; triphenyl glycol and triphenyl ethanolamine.  Gellers mentioned are boron trifluoride, sulphuric acid, phosphorus pentoxide, halides of Group III to V (Mendeleef) elements, possibly in admixture with mercaptans, alkyl metal and Grignard compounds as well as mixtures of amine salts and mercaptans, and strong reducing agents such as ascorbic acid.  Conventional unsaturated polyesters and copolymerizable monomers may be used as well as conventional polyester additives.  Prepolymers are obtained which can then be finally hardened.