baber/WOPTO huggingface dataset:
Patent GB-1309024-A (GB)
Title: Laundering of articles
IPC: D06F13/02
Filed: 1971-04-19
Abstract: 1309024 Washing machines PHILCO-FORD CORP 19 April 1971 [9 March 1970] 23350/71 Heading D1A An agitator of a washing machine is oscillated about a vertical axis through an arc in the range from 65‹ to 105‹ and at a frequency between 155 and 250 cycles per minute and preferably with an average angular velocity between 500‹ and 550‹ per second. The agitator is of polypropylene and comprises a skirt 24 and three upper radial vanes 22 to which they are connected by helical sections 23.
Patent GB-461960-A (GB)
Title: Improvements in or relating to refractory articles
IPC: C22C32/00
Filed: 1935-08-20
Abstract: A refractory article comprises refractory aggregates having a residual carbon bond and having uniformly incorporated in and dispersed throughout one or more finely divided oxidizable metals, metal alloys, silicides or carbides of the same capable of forming by surface oxidation a vitreous protective coating of fused silicate on the article, silica being present in the aggregates if a metal, or an alloy which contains no silicon, is used.  The aggregates may be graphite, crystalline or amorphous aluminium silicates, crystalline or amorphous aluminium oxide, crystalline or amorphous silica, silicon carbide, zircon and zirconia.  The metals, &c., may be (singly or in combination) iron, steel, manganese, magnesium, copper, lead, zinc, ferro-manganese-aluminium-silicon, ferro-manganese carbide, ferro-manganese, ferro-silicon, ferro-chrome and German silver. The initial bond may be tar, pitch, resin, molasses, dextrin, or glutin.
Patent GB-208751-A (GB)
Title: Improvements in or relating to the manufacture of cellulose
IPC: D21C3/22
Filed: 1922-08-29
Abstract: 208,751. Thornley, F. C., Tapping, F. F., and Reynard, O. Aug. 29, 1922. Pulp, preparation of.-In a process for obtaining cellulose from vegetable materials, for example saw dust, wood waste, rushes, bamboos, sea weed, &c., in which the material is treated with sulphur dioxide gas in a liquid medium, the gas is used in a finely divided state produced mechanically by intense agitation. The liquid medium may be lime water, milk of lime, a soluble alkaline carbonate, or the oxide, hydroxide, or carbonate of an alkaline earth suspended in water, the suspended or dissolved substance acting as a carrier for the sulphur dioxide. In an example, 1 ton of vegetable matter mixed with 4 tons of liquid medium is agitated for 2-12 hours by a screw propeller in a gas-tight pan while 100-200 lbs. SO2 per ton of material is led in through the bottom of the pan at a temperature of about 100‹ C. The liquid medium contains preferably 17-34 pounds of magnesium carbonate per 100 gallons liquid. The product obtained consists of a solid portion consisting mainly of cellulose and a small liquid portion containing the non cellulose constituencies with only a small proportion of mineral matter.
Patent GB-625828-A (GB)
Title: Process for the manufacture of a rubber latex composition
IPC: C08L7/02
Filed: 1946-08-07
Abstract: A uniform mass is obtained by adding to rubber latex containing one or more binding agents at least one substance of the character of stabilising agents, self vulcanizing agents, pigments, and filling materials except cellulose and then adding cellulose until an emulsion of desired thickness is obtained without substantial coagulation.  The binding agents may be sulphur and glue in which case the mass is vulcanized after drying, or water glass in which case talcum powder may also be added.  In an example gum tragacanth, ammonium caseinate, water glass, colloidal sulphur and zinc oxide is added to latex and ground cellulose added and the mixture dried to give a product suitable for covering furniture, trunks, for carpet making and for shoe manufacture.  The mixture may also be applied to one or both sides of a linen, cotton or jute fabric and then rolled into sheets or strips.  The cellulose may be in the form of wood pulp, wood flour, sawdust or wadding.  Dyes may be added in solution or by spraying, and coloured or non-coloured textile fibres or cork may also be added by spraying.
Patent GB-808765-A (GB)
Title: Improvements in or relating to sewing machines
IPC: D05B27/04
Filed: 1955-08-16
Abstract: 808,765. Sewing machines. PFAFF, A.G., G. M. Aug. 16, 1955 [Aug. 16, 1954], No. 23528/55. Class 112 In order to prevent puckering of material, such as fabrics woven from synthetic fibre, a work-feeding presser foot 21 in a sewing machine has a toe 41 extending in front of the sewing needle 17 and a heel 45 behind the latter, means being provided for displacing the heel relatively to the toe to stretch the material at the point where the needle penetrates it. The needle bar 15 and feeding presser bar 20 are carried by an oscillating frame 16, and the presser foot 21 co-operates with a fourmotion feed dog 22. Heel 45 is pivoted at 50 to a depending arm of a bell crank lever 47 pivoted at 48 to the presser foot. A horizontal arm of lever 47 is formed with an enlarged portion 51 provided with a vertical slot 52 and a pair of aligned slots 54. The shank 53 of the main presser foot 24 passes through slot 52, and a pin projecting from shank 53 engages slots 54. The arrangement is such that when presser foot 21 and feed dog 22 move rearwardly in the feeding stroke, lever 47 is swung in the clockwise direction to carry heel 45 away from toe 41.
Patent GB-363976-A (GB)
Title: Improvements in and relating to metallic vapour rectifiers
IPC: H01J13/12
Filed: 1931-08-21
Abstract: 363,976. Mercury-vapour rectifiers. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.-(Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin.) Aug. 21, 1931, No. 23594. Convention date, Aug. 21, 1930. [Class 39 (i).] The cathode spot is located by means of a ring which is made of ceramic material, such as quartz, porcelain, or fireclay, and is composed of segments secured together by metallic rings. The segments may be formed with interengaging tongues and grooves, Fig. 2, or of overlapping curved plates b, Fig. 4, held in iron channel-shaped rings, or of curved segments c, Fig. 6, assembled to form two rings.
Patent GB-628384-A (GB)
Title: Improvements relating to field control systems for synchronous electric motors
IPC: H02P1/46
Filed: 1944-11-27
Abstract: 628,384. Starting synchronous motors. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 27, 1944, No. 23623. Convention date, Nov. 27, 1943. [Class 38(iii)] Apparatus for applying D.C. excitation to an induction-starting synchronous motor 1 when synchronous speed is approached comprises a pivoted armature 9 coupled to the field switch and controlled jointly by a spring 10 and electromagnets 11, 12, 13, the spring normally biassing the switch to the open position shown in which the field 5 is disconnected from the D.C. supply 6 and shunted by a discharge resistor 8. The motor is started by closure of the main A.C. switch 4, the field 5 and resistor 8 forming a closed secondary circuit carrying current of slip frequency. Magnet 12 is energized upon closure of 4 but is unable at high slip to overcome the combined effects of spring 10 and magnet 11, the winding 15 of which is energized through a half-wave rectifier 16 from resistor 8. A short-circuited winding 17 tends to maintain the flux in magnet 11 during the half cycles. in which the rectifier is non-conducting. When the slip has fallen to a low value-determined by a rheostat 27-magnet 12 overcomes magnet 11 as winding 17 is then unable to maintain the flux sufficiently long during the non-conducting periods of the rectifier. Armature 9 in consequence is attracted to magnet 12 and closes the field switch to apply D.C. excitation. Condenser 28 and resistor 29 determine the point in the slip cycle at which D.C. excitation is applied. Condenser 28 also affects the inductive effect of winding 15 at high slip frequencies so as to ensure adequate current in this wind. ing on starting. The movement of the armature towards magnet 12 interrupts the energizing circuits of both magnets, a short-circuited winding 22, however, maintains the flux in magnet 12 sufficiently long for electromagnet 13 to become energized from the D.C. supply and hold the armature. D.C. is preferably applied to only a portion of the winding of magnet '13, the whole winding being shunted by a condenser 25 for the purpose of ensuring a quick release of the armature and removal of excitation in event of the machine losing synchronism. Specification 566,750 is referred to.
Patent GB-517846-A (GB)
Title: Pin for artificial teeth and method of making same
IPC: A61C13/10
Filed: 1938-08-10
Abstract: 517,846. Artificial teeth ; metal articles; soldering. JACKSON, L. MELLERSH-. (Dentists' Supply Co.). Aug. 10, 1938, No. 23631. [Class 81 (ii)] [Also in Group XXII] A pin for attaching artificial teeth to a denture has a block of solder 22 extending from the end thereof, the block having integral wings 27 parallel with the pin and embedded therein. The block of solder is cut from a strip of material 17 which has a central longitudinal ridge 18 and longitudinal side flanges 19. 'The ribbon is cut into sections as shown at 4-4. The ribbon may be rolled, drawn or extruded, which process tends to harden the solder, thus rendering it easier when the pin 13 is placed on the centre of a piece of the ribbon and the flanges bent up parallel with the pin, to swage these flanges round and into the material of the pin. The protruding edges may be machined off and the pin can be readily inserted in the socket of an artificial tooth since the solder extends only slightly laterally from the stem of the pin. The socket in the tooth is preferably prepared by incorporating a coil or ferrule in it when fixing. The solder when heated unites the pin to the coil. U.S.A. Specification 1,821,301 is referred to.
Patent GB-1011304-A (GB)
Title: Improvements in or relating to antenna arrays
IPC: H01Q21/20
Filed: 1962-11-23
Abstract: 1,011,304. Aerials. SIEMENS & HALSKE A.G. Nov. 23, 1962 [Nov. 23, 1961], No. 23631/65. Divided out of 1,011,303. Heading H4A. Means are described for modifying a known aerial array, Fig. 1, comprising four half - wave dipole assemblies 2 and 3 (the other two not being shown), fed with signals from a common source via individual feeders such that at a certain frequency the phase of the energy reaching the dipole assemblies advances by 90 degrees from one assembly to the next, whereby the aerial can operate over a frequency range of 0À85 fm to 1À15 fm, where fm is the geometric mean frequency, without the minimum radiated energy in the horizontal plane falling below half the maximum value. In the arrangement of Fig. 2, dipole assembly 33 is fed with a feed line #n/4 shorter than that feeding dipole assembly 32, dipole assembly 34 is fed with a feed line the same length as that feeding assembly 32, but with the addition of a phase reversing unit, and dipole assembly 35 is fed with a feed line the same length as that feeding assembly 33, but with the addition of a phase reversing unit. By this arrangement the phase difference between the energies at dipole assemblies 32 and 33, and between dipole assemblies 34 and 35, increases with increasing frequency, whilst that between dipole assemblies 33 and 34, and between dipole assemblies 35 and 32, decreases with increasing frequency. Dipole assemblies 33 and 35 are moved clockwise along their respective sides of the tower support 31, such that the distance d 1  between the adjacent dipole assemblies 34/35 and 32/33 is equal to 1À25 #m and greater than the distance d 2  (0À75 #m) between the adjacent dipole assemblies 33/34 and 35/32. With this arrangement the horizontal lobe diagrams for f = fm, 0À85fm and 1À15 fm are as shown at 42, 43 and 44, respectively. Further improvements in the lobes can be obtained by basing the staggering of the dipole assemblies on a higher frequency than fm.
Patent GB-447397-A (GB)
Title: Semaphore or colour signalling device for street crossing traffic with travelling progressive time indicator
IPC: H01H63/04
Filed: 1934-08-16
Abstract: 447,397. Road signals for controlling traffic. BEDONI, M., 6, Via del Campidoglio, Rome. Aug. 16, 1934, Nos. 23680 and 23681. Void [Abridged as open to inspection under Sect. 91 of the Acts, Feb. 18, 1935]. [Class 118 (ii)] To indicate the time available before a change in signals, either a band having transparent and opaque sections is moved across a lamp opening or a row of lamps is lit and the lamps successively extinguished. The speed of the driving motor of the unit can be altered to vary the cycle time. As shown in Figs. 5 and 6, the bands 12 move across the red and green signals, the lamp 13 or 14 lighting as the opaque portion commences to cross the opening and being extinguished and replaced by the other lamp when the opening is covered. In the alternative arrangement indicated in Figs. 12 and 13, a main lamp and a row of auxiliary lamps are provided for each colour, all the lamps of a colour being lit when the signal changes and the auxiliary lamps being successively extinguished as the period elapses. The apparatus is controlled by a motor-driven drum, the speed of the motor being variable to alter the cycle time. The motor may be arranged to run at different speeds for the red and green periods, suitable resistances being cut into and out of the circuit by cams driven by the motor.
Patent GB-858369-A (GB)
Title: Improvements in printed matter adapted for electrical sensing
Inventor: HARRISON ERNEST HANDYSIDE
IPC: B42D15/00
Filed: 1958-07-23
Abstract: Conductive lines on postage stamps (see Group XV) are printed on the obverse of the stamp using an ink containing deflocculated graphite and in which the pigment is suspended in alkyd resins and thinned with a mixture of solvents of the ketone groups.  Curing is effected by infra-red heaters.
Patent GB-466390-A (GB)
Title: Improvements in electrical devices for detecting a gas in a gaseous mixture and for determining the amount thereof
IPC: G01N27/16
Filed: 1936-08-29
Abstract: <PICT:0466390/III/1> In the estimation of combustible constituents of a gas mixture by determining the change of resistance of an electric conductor, the latter comprises a wire or rod 17 of material having a constant resistance value and temperature coefficient which is enclosed in a tube of porous material 18 coated or impregnated with the catalytic agent 19.  Two such elements are arranged in a Wheatstone bridge in the known manner for comparing the gas with a standard gas, which may be a portion of the gas under test from which the combustible constituents have been removed.  The element exposed to the standard gas may or may not contain catalyst; in the former case the gas connections of the two cells may be changed over when the first catalyst becomes exhausted.
Patent GB-1268445-A (GB)
Title: Data acquisition and control systems
Inventor: WRIGLEY WILLIAM R
IPC: H04L27/32
Filed: 1969-05-09
Abstract: 1,268,445. Telegraphy; stations connected to a common channel. W. R. WRIGLEY. 9 May, 1969 [20 May, 1968], No. 23749/69. Heading H4P. [Also in Division G4] Communication between a plurality of remote units and a central data unit of a computer is over an interrogate line and a response line only, the central unit transmitting synchronizing pulses and frequency modulated address and data words in a predetermined sequence. A master sync. pulse from the central unit is followed by a sequence of octal coded frequencies to select a desired remote unit, a subsequent reset pulse resets all remote units except the addressed unit, and this is followed by one or more data words comprising a sequence of frequencies, each data word except the last having an end of word pulse and the transmission being ended by an end of message pulse. One data word may be compared with data inputs at the remote unit and another data word may be checked for validity at the remote unit, the results of the comparison and validity check being transmitted over the response line. The validity-checked word is fed to command outputs.
Patent GB-599339-A (GB)
Title: Improvements in or relating to discriminator circuits for signal modulated electric pulses
IPC: G01S1/30
Filed: 1945-09-14
Abstract: 599,339. Pulse modulation. STANDARD TELEPHONES & CABLES, Ltd. Sept. 14, 1945, No. 23831. Convention date, Sept. 11, 1944. [Class 40 (v)] For deriving the modulating signal from a train of pulses in which alternate pulses have a substantially uniform recurrence frequency and the time spacing between successive pulses is variable in accordance with the signal, even and odd harmonics of said recurrence frequency are selected from the pulse train and used, after rectification, for operating a visual or audible signal reproducer. In one embodiment, a radio pulse train receiver 2 feeds its demodulated pulse output to circuits 6, 7, which select predetermined odd and even harmonics respectively of the alternate pulse recurrence frequency. Their outputs are rectified by diodes 13, 14 respectively and feed the mutually perpendicular coils 26, 27 respectively of an indicator 28, a pivoted magnet 29 being mounted in the field of the coils, and bearing a pointer 30. In a further embodiment, the main rectifiers feed a push-pull transformer coupled to an audio reproducer, and an A.V.C. potential is derived from a resistance common to both rectifier circuits.
Patent GB-1387018-A (GB)
Title: Method of manufacturing capacitors in an electronic microstructure
IPC: H01L21/00
Filed: 1972-05-22
Abstract: 1387018 Capacitors PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 22 May 1972 [24 May 1971] 23890/72 Headings H1M and H1K In a method of manufacturing a capacitor an insulating layer 2 of, e.g. SiO2 is formed on one side of a semi-conducting substrate 1, e.g. silicon and a layer 3 of noble metal, e.g. gold or platinum is deposited on the opposite surface, a layer of metal capable of being superficially oxidized, e.g. aluminium, is deposited on layer 2 and is in electrical contact with the substrate through a window in layer 2, the assembly is placed in an oxidation bath wherein the equilibrium potential of the noble metal is at least 2 volts higher than that of the metal of layer 4 whereby a dielectric oxide layer 5 is formed on the latter without application of an external voltage and a counter electrode 10, e.g. vapour deposited aluminium, is finally applied on the dielectric oxide layer. The oxidation bath may comprise fuming HNO3or potassium dichromate containing fluoride and carbonate and it may also serve to remove photo-etch resist lacquer used in preceding steps. The oxide layer may be rendered less porous by dipping in boiling water. The capacitor may be an integral part of a micro-circuit as shown in Fig. 2, and consists of lower and upper electrodes 22, 23 on silicon wafer 21. Electrode 23 is connected to diode 15, 18 and transistor 19, 17, 16, emitter 16 being connected to contact region 27 through deposited resistor 29. In Fig. 3, lower capacitor electrode 34, insulated from silicon base by silicon dioxide layer 33, is connected to collector contact 41 of transistor 38, 39, 40.
Patent GB-625741-A (GB)
Title: Improvements relating to sawtooth waveform generators
IPC: H03K4/16
Filed: 1946-08-13
Abstract: 625,741. Sawtooth generating circuits. FAUDELL, C. L. Aug. 13, 1946, No. 23914. [Class 40 (vi)] In a blocking oscillator for generating a sawtooth waveform in which a capacitor connected to the anode of a valve is charged whilst the valve is non-conducting and then rapidly discharged through the valve by the regenerative coupling between two other electrodes when it subsequently conducts, the sawtooth wave generated is made more linear by biassing a further electrode so that leakage from the capacitor through the valve before the rapid discharge commences is prevented. Fig. 1 shows a blocking oscillator in which capacitor 3 is charged from an H.T. supply through resistor 2 whilst valve 1 is cut-off and subsequently rapidly discharged when valve is rendered conducting by a positive synchronizing signal at lead 8. The suppressor grid is biassed negatively by the cathode network 11, 12 so that the valve is effectively cut-off during the whole of the time between its first being rendered non-conducting and the arrival of the subsequent initiating signal at 8. In a modification, Fig. 2 (not shown), the suppressor grid is biassed by connecting it via a resistor to the control grid circuit with a capacitor connecting it to earth. In the modification shown in Fig. 3 the suppressor grid is connected via a R.C. network 15, 16 across the secondary of the blocking oscillator transformer, the time constant of this network being long compared with that of the grid network 9, 10 so that the suppressor is still at a negative potential when the initiating signal appears at lead 8.
Patent GB-203889-A (GB)
Title: Improvements in collapsible hoods for motor or other vehicles
IPC: B60J7/12
Filed: 1922-09-04
Abstract: 203,889. Hillman Motor Car Co., Ltd., and Green, E. A. Sept. 4, 1922. Hoods.-In vehicle hoods having main pivoted pillars and a front bow, the sole support of the bow consists of two links C, H pivoted at different levels to the main pillars at A<2>, A<3> and attached at different points G<2>, G<3> to the front bow adjacent its mid-length, one C of which links is extended beyond its attachment to the main pillar for connection to a two-piece folding strut D. An additional link F connecting the strut to the main pillar may be provided as also may a stop J for the link C.
Patent GB-1316686-A (GB)
Title: Process for the preparation of coffee infusion
IPC: B65D81/00
Filed: 1971-04-19
Abstract: 1316686 Coffee making MIKO P V BA 19 April 1971 [21 Dec 1970] 24074/71 Heading A4E A method of making coffee comprises grinding roasted coffee so that at least 75% passes through a D.I.N. 0 screen, placing the ground coffee 6 in a filter pack that consists of an envelope of two sheets of filter paper 4 and 5 held in the base of a polypropylene tube 1. The tube is filled with hot water so that a pressure of at least 60 mm. H 2 O is exerted on paper 4 and a pressure of 120-200 mm H 2 O is developed within the envelope by the swelling of the coffee and the evalution of vapour 8. Preferably the ratio of the volume of the ground coffee to the volume of the envelope is 0À61.
Patent GB-603592-A (GB)
Title: A method of cable protection applicable to three-phase high tension ring main feeding systems
IPC: H02H7/22
Filed: 1945-09-18
Abstract: 603,592. Detecting and indicating faults. ASIA ELECTRIC, Ltd., and YOUNG, D. S. Sept. 18, 1945, No. 24082. [Class 37] [Also in Group XXXVII] The sheaths 4 of single-core cables 1 ... 3 of a feeding system having its neutral earthed through a currentlimiting resistance, are bonded together at regular intervals 9, 10 to provide a low-resistance path for fault current, the continuity of the sheathing in each section being interrupted at 5 to prevent the sheathing from acting as a return path for other fault currents. On a fault in the cable-insulation, the earth - fault current energizes a current transformer 13 in the sheathto-earth connection 11 at A, thereby opening contacts 29 and de-energizing relay 31 to close contacts 32 in the circuit of an alarm 21 indicating device which is either situated locally or at a remote control station.