baber/WOPTO huggingface dataset:
Patent GB-649874-A (GB)
Title: A wattmeter for electric high frequency currents
IPC: G01R21/00
Filed: 1948-09-15
Abstract: 649,874. Power meters. TESLA NATIONAL CORPORATION, and VACKAR, J. Sept. 15, 1948, No. 24240. Convention date, Sept. 23, 1947. [Class 37] For the measurement of high-frequency power, voltages proportional to the sum and difference of the voltage and current components are rectified and currents proportional to these rectified voltages are taken to the windings of two electromagnetic measuring systems mounted on one axis in such a way that their torques oppose each other. Two condensers 1, 2 form a voltage divider and their junction is connected to the centre a of the secondary winding of a current transformer 3, across which are connected low resistances 4. At the terminal points b, c of the resistances 4 voltages are produced proportional to the sum and difference of the voltage and current components. These voltages are rectified by diodes 8 having a linear characteristic over their working range, the cathodes of which are connected to earth through condensers 5, resistances 6, and the windings of a differential instrument 7. This has a square law and may be calibrated directly in power units. The condenser 1 may be formed as a screen on the current transformer 1. For power measurements on symmetrical or polyphase lines, current transformers may be used in each branch and the resulting torques added in more than one measuring instrument. Specifications 384,443 and 491,772 are referred to.
Patent GB-877928-A (GB)
Title: Moulding compositions
IPC: C08L25/10
Filed: 1960-07-12
Abstract: A moulding composition comprises a blend of (1) from 5-50 parts of a cross-linked tapered copolymer prepared from a conjugated diene and a vinyl-aromatic compound in the ratio of from 1 : 2-2 : 1 and (2) 95-50 parts of a vinyl-aromatic compound polymer.  By "tapered copolymer" is meant a polymer of one monomer with grafts on it which contain increasing proportions of the other monomer, that is, a mixture of copolymers of varying composition prepared by incremental monomer addition during an emulsion polymerization process.  All the monomeric diene may be present initially together with part of the vinyl-aromatic compound, the remainder being added incrementally during the polymerization, while cross-linking may take place by adding from 0,1-1,0 parts of divinyl benzene after at least 30% (or even 50%) of the total monomers have polymerized, or after complete conversion by adding a polymerization initiator, e.g. potassium persulphate. The cross-linked tapered copolymer in latex form may be blended with a polyvinyl-aromatic latex, the blend coagulated, dried and further blended with a polyvinyl aromatic compound in solid form. Butadiene, isoprene, chloroprene, styrene, vinyl toluene and alpha-methyl styrene are specified monomers.
Patent GB-870264-A (GB)
Title: Improvements in or relating to aircraft control systems
Inventor: ROWLEY DONALD
IPC: F41G7/22
Filed: 1951-10-17
Abstract: 870,264. Automatic steering control systems. BRISTOL AIRCRAFT Ltd. Nov. 14, 1952 [Oct. 17, 1951], No. 24288/51. Drawings to Specification. Class 38 (4). In an automatic aircraft control system the craft is guided towards a target by a radar receiver on the aircraft which receives signals radiated from the target and which provides an error signal representative of the angular difference between the receiver disc axis and the direction of the target from the missile. The craft has two lift-providing surfaces which are adjustable differentially to role the craft about its longitudinal axis and adjustable in the same sense to turn it about an axis parallel to the common axis of the wings. The radar receiver disc axis is maintained parallel to the reference gyro axis and from the received radar error signals, signals are developed to precess the gyro and to provide further signals corresponding to the target spin about the missile axes. From the latter, signals are developed proportional to the required accelerations normal to the missile longitudinal axis, one perpendicular to and one parallel to the wing axis. After correcting for gravity, the two acceleration signals are applied to a computor to produce the roll error signal and this, added to the acceleration signal perpendicular to the wing axis is applied to one wing servomotor and the difference to the second motor. Damping in pitch and yaw is effected by rear control surfaces set at 45 degrees to the wings and controlled from two rate gyros, the signals from which are added algebraically. All the correcting control signals are passed through amplifiers, the gains of which are variable in accordance with' a function of the air density and craft forward velocity. In addition the movement of all control surfaces is limited to an amount which is a different function of air density and craft velocity.
Patent GB-693843-A (GB)
Title: Manufacture of beta-methoxy-isobutyraldehyde
Inventor: BEWLEY THOMAS
Filed: 1950-10-06
Abstract: Beta-methoxy-isobutyraldehyde is produced by introducing alpha-methacrolein into methanol in the proportion of one mole. of alpha-methacrolein to at least twelve moles. of methanol with agitation and in the presence of an alkaline catalyst while maintaining the temperature below about 0 DEG  C.; the rate of adding the alpha-methacrolein is adjusted so that the whole quantity is added within 30 minutes and the condensation effect of the alkaline catalyst is neutralized within 30 minutes after all the aldehyde is added; the reaction mixture is freed from admixed salts and the b -methoxy-isobutyraldehyde is separated by fractional distillation. The alkaline catalyst may be an alkali metal hydroxide such as sodium hydroxide or an alkali metal alcoholate such as sodium or potassium alcoholate.  The reaction may be carried out continuously or batchwise.  The neutralization is carried out by adding an acid to the reaction mixture.  The preferred acid is phosphoric acid but strong mineral acids such as hydrochloric or sulphuric acid and organic acids such as acetic, formic or oxalic acid may be used. Small quantities of a -g -dimethyl-a -methoxy-ethyl-glutaraldehyde may be formed during the course of the reaction.  The condensation may be carried out in the absence or presence of a polymerization inhibitor such as hydroquinone.  U.S.A. Specification 2,504,680 is referred to.
Patent GB-518244-A (GB)
Title: Worm press for separating viscous resinous substances from liquids of lower viscosity
IPC: B29B7/42
Filed: 1938-08-19
Abstract: 518,244. Extrusion-presses. I. G. FARBENINDUSTRIE AKT.-GES. Aug. 19, 1938, No. 24508. Convention date, Aug. 19, 1937. [Class 46] A worm press for separating viscous resinous substances from liquids of low viscosity comprises a casing a formed with longitudinal grooves on its inner surface, and enclosing a worm d which is of decreasing pitch towards the outlet b. The material to be pressed is fed through an inlet e and the liquid of lower viscosity escapes through an outlet f. A weighted valve c may be provided.
Patent GB-188142-A (GB)
Title: Improvements in or relating to lamp reflectors
IPC: F21V7/04
Filed: 1921-09-15
Abstract: 188,142. Keane, C. H. Sept. 15, 1921. Reflectors.-Lamp reflectors of opaque material of the kind having the reflecting surface provided with annular or spiral corrugations or ridges are made with a metallic reflecting surface formed with closely disposed annular or spiral corrugations A of very small width and depth, the pitch of the said corrugations not exceeding 1/10 of an inch and not being less than 1/20 of an inch. The reflecting-surface is preferably coated with dull silver plating or the like in such a manner as to give a pearly, sheeny, glossy, or silk surface, as described in Specification 105,600. The pitch of the corrugations A is varied with the nature of the reflecting surface and with the size of the reflector, the larger the reflector and the duller the surface the larger are the corrugations. The corrugations may be produced by spinning or pressing.
Patent GB-773676-A (GB)
Title: Apparatus for mechanically folding packaging sleeves
IPC: B65B23/22
Filed: 1954-11-08
Abstract: 773,676. Forming cartons. DESHAW, Z. Nov. 8, 1954, No. 24599/56. Divided out of 773,675. Class 18. Apparatus for folding in the flange at the end of lamp packages as described in Specification 773,675 comprises arms 18 which engage the outside of the carton to hold it vertically beneath a folding head, the head carrying elements 28 which force the sides of the flange, Fig. 8, outwards to initiate folding of the gussets, and blades 29 which swing inwards against the gusset folds to bring the flange to the position of Fig. 1. A plate 33 descends on the flange to complete the folding. The elements 28, 29 are pivoted on a mounting 26 and operated by racks 25 engaging pinions 30, the racks 25 being carried on a plate 24. The arms 18 approach the carton in pairs from opposite sides, being swung inwards on members 16, and have sloping surfaces which accurately locate a misplaced carton beneath the head.
Patent GB-839818-A (GB)
Title: Improvements in or relating to a colostomy container
IPC: A61F5/448
Filed: 1958-07-31
Abstract: 839,818. Colostomy appliances. JACOBSEN & FREDERIKSEN A.S. July 31, 1958 [Aug. 1, 1957], No. 24719/58. Class 81 (2). A colostomy container comprises a synthetic plastic bushing 3, the relatively resilient flange 2 of which is attached to the skin by an adhesive layer 10, and a detachable bag 6 of flexible material attached to the bushing. The bushing is of greater length and diameter than the protruding part of the colostomy. The mouth of the bag is secured over a collar 9 on the bushing by an elastic band 7. In a modification, a textile or synthetic plastic layer 11, Fig. 3, of greater area than the flange 2 is secured by adhesive 10 to the side of the flange remote from the skin and to the skin area beyond the flange. The layer 11 may have radial slits.
Patent GB-689063-A (GB)
Title: Travelling wave tube
IPC: H01J25/38
Filed: 1950-10-10
Abstract: 689,063. Travelling-wave tubes. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Oct. 10, 1950 (Oct. 17, 1949], No. 24766/50. Class 39(i) [Also in Group XL(b)] In a travelling wave apparatus in which there is interaction between an electron beam and an input wave travelling along a delay line such as a helix H, the output device is a band pass circuit consisting of two annular cavities A, B coupled by a slot b, the modulated beam exciting cavity A and the output being taken by loop E from cavity B which is not directly coupled to the electron beam. The input coupling device is an antenna A<SP>1</SP> and the wave is completely absorbed at the other end of the helix by a localised attenuation L. The output resonator arrangement has a flexible wall P to allow for (a) adjustment of the gap width b to vary the width of the pass band, by turning screw V<SP>1</SP>, and (b) tuning of cavity A by varying gap width a, by turning screw V<SP>2</SP>. Elements R actuated by screws V<SP>3</SP> are provided for tuning cavity B. The arrangement is stated to provide a wider pass-band than that obtainable with a single output cavity resonator. Specification 660,792, is referred to.
Patent GB-628089-A (GB)
Title: Improvements in or relating to electrodes for use in diathermic or like apparatus
IPC: A61N1/06
Filed: 1947-09-10
Abstract: In a diathermy electrode of the type comprising a metallic plate carrying insulating spacers which hold it at a predetermined distance from the body, as described in Specification 626,407, resilient members engage the plate to give it a dished shape with its concave face towards the body.  When the plate is pressed against part of the body it becomes flattened and tends to conform to the shape of the part.  In the embodiment described, a rectangular copper gauze plate has cuts in two opposite edges and phosphor-bronze strips attached to its rear surface to give it the desired shape.  Two electrodes, or one electrode and a non-electrode member, may be mounted on two arms pivoted to each other so that part of the body may be gripped between them.
Patent GB-462318-A (GB)
Title: Improvements in or relating to swimming machines
IPC: A63B35/10
Filed: 1935-09-06
Abstract: 462,318. Bathing-appliances. HENSON, R. W. E. Sept. 6, 1935, No. 24876. [Class 77] In a swimming-machine with an elongated body and a screw propeller 11 driven by two handles 7 on a transverse shaft 6 and gearing 8, 10, the body comprises a pointed or fish-shaped board 1 with an edging of one or more strips of wood 2, and the longitudinal propeller-shaft 9 is mounted on a longitudinal wooden rib 12 under the board. Projections 16 and the cheeks 4 carrying the bearings for the transverse shaft prevent the mechansm from touching the ground. The propeller may be at the back or front, or beneath the board. Slightly inclined wooden or metal plates, adjustable in position and/or in inclination, may be provided as elevators near the front of the machine.
Patent GB-652559-A (GB)
Title: Improvements relating to vehicle direction indicators
Inventor: BAKER ALFRED DICKENS
IPC: B60Q1/36
Filed: 1948-09-24
Abstract: 652,559. Road traffic signals on vehicles. LUCAS, Ltd., J. Sept. 24, 1948, No. 24992. Drawings to Specification. [Class 118 (ii)] A vehicle direction indicator of the semaphore arm-type comprises a base-plate on which the arm is mounted and a separate cover member for enclosing the arm and its associated operating - mechanism. The cover member is slotted to allow the arm to extend through it and is fixed to the base by screws. The Provisional Specification states that other fixing means may be employed.
Patent GB-1043879-A (GB)
Title: Gymnastic apparatus
Inventor: DOLPHIN JOHN ROBERT VERNON
IPC: A63B21/22
Filed: 1964-06-17
Abstract: An exercising machine comprises a spool with a flywheel secured thereon mounted in fixed bearings, and a cable connected to the core of the spool such that pulling on the end of the cable unwinds the cable and rewinds it in opposite direction.  Rythmic pulling of the cable produces an increasing amplitude of oscillation of the spool and flywheel.
Patent GB-719515-A (GB)
Title: Improvements in or relating to lifting apparatus for agricultural implements
IPC: A01D34/24
Filed: 1952-10-07
Abstract: 719,515. Tractor-mounted implements. BUSATIS, P., VOGT, H., and NEVELING, P., [trading as BUSATIS, GEB.] Oct. 7, 1952 [Oct. 8, 1951], No. 25052/52. Classes 6 (1) and 6 (3) In a tractor-mounted implement of the type wherein the power-lift mechanisn 2 raises the implement through the intermediate members 4, 6, 9, these members include a spring 5 in series with an effort-transmitting member, such as a bell-crank 6 or pulley, the effort-transmitting member being lockable at some position short of the fully-lifted position by a lever 10, while the spring 5, by its extension, permits the lift-arm to continue its full travel. As shown, the efforttransmitting member is a pivoted bell-crank 6, but it may be a chain-pulley (not shown). More than one intermediate position may be provided by the use of stops.
Patent GB-897928-A (GB)
Title: Improvements in or relating to electrical control systems
IPC: G05D23/22
Filed: 1958-08-05
Abstract: 897,928. Automatic temperature-control systems. COMMONWEALTH SCIENTIFIC. & INDUSTRIAL RESEARCH ORGANIZATION. Aug. 5, 1958 [Aug. 8, 1957], No. 25060/58. Class 38 (4). In a two-step controller for controlling a condition of a medium, the voltage of a detector, which is representative of the condition, is combined in series with that of a condenser which is being charged when the controller is being operated at one level and is being discharged when the controller is operating at the other level, and the magnitude of the combined voltage determines the level at which the controller is operating. In Fig. 2, the temperature of a furnace 1 is automatically maintained at a desired value by including in series with the furnace A.C. heater (not shown) contacts S of an on-off relay 3 energized through an amplifier 2 from a thermocouple T responsive to furnace temperature. To reduce hunting, further contacts S 1  of relay 3 control the charging and discharging of a condenser C, a portion of the voltage across which is supplied as negative feedback to the input of amplifier 2. In a modification, Fig. 3 (not shown), feedback from another resistance-capacity network having a longer time constant is also applied to the input of amplifier 2 under the control of further contacts of relay 3. Application to the automatic control of pressure and hydrogen ion concentration in liquids is referred to.
Patent GB-935671-A (GB)
Title: Improvements in and relating to compositions for use in agriculture and horticulture
Inventor: LINDSAY WILLIAM STANLEY
Filed: 1961-07-11
Abstract: Plant growth regulating compositions contain substituted or unsubstituted polymethylene dinitramines or compounds which yield polymethylene dinitramines under hydrolyzing conditions.  They may have the formula <FORM:0935671/I/1> where R is a substituent group or hydrogen.  Examples of p  polymethylene dinitramines are ethylene dinitramine, trimethylene dinitramine, tetramethylene dinitramine, N, N1-dinitrodiacetyl ethylene diamine, N, N1-dinitroethylene bis-acetamide, N, N1-dimethyl ethylene dinitramine and hydroxy methylethylene dinitramine. Examples of compounds which hydrolyze to the dinitramines are dinitroethylene urea, trimethylene dinitrourea and N - hydroxymethylethylene dinitramine.  The compositions may be solids or liquids and may contain chalk, talc, kieselguhr, bentonite, china clay, ammonium sulphate, ammonium nitrate, urea, phosphorus or potassium compounds, herbicides, fungicides, insecticides, peat, spent hops, malt, water, acetone and dispersing agents.  The compositions may contain 0,1% to 25% of the dinitramine compound.
Patent GB-1082685-A (GB)
Title: Bowling pins
Inventor: GROOMBRIDGE DENIS WILLIAM
IPC: A63D9/00
Filed: 1963-06-25
Abstract: 1,082,685. Bowling pins. BRITISH CELANESE Ltd. June 24, 1964 [June 25, 1963], No. 25159/63. Heading A6D. [Also in Division B5] A hollow-bodied bowling pin is rotationmoulded, preferably from a plastics material. The head of the pin may be either hollow or solid, and in the former case a core is introduced into the mould cavity to define the cavity in the head, and the pin is provided with an opening to allow removal of the core. The opening is closed by a separate plastics cap 10, and the pin may also comprise a replaceable plastics base plate 11. The wall of the pin may comprise further cavities for the reception of weighting material. The material of the pin is preferably one which can be polymerised during the moulding process, for example nylon 6, the mould being heated to effect such polymerisation. After moulding the pin is preferably toughened by soaking in hot water.
Patent GB-793566-A (GB)
Title: New colouring process
Inventor: CLARKE WILLIAM
Filed: 1955-09-02
Abstract: Patterned or differential colour effects are produced on textile materials by locally applying a composition comprising glutaric acid, a hydrophilic organic substance and one or more dyestuffs which contain isothiouronium salt groups attached through methylene linkages to aromatic nuclei and then steaming and optionally after-treating with a precipitating agent for the dyestuff.  Instead of glutaric acid a mixture thereof with other aliphatic dicarboxylic acids, such as succinic acid, may be employed, and the glutaric and other acids may be employed in the form of their salts with urea. Suitable hydrophilic organic substances, which may be employed in admixture, are b  : b 1-dihydroxydiethyl sulphide, resorcinol, ethylene glycol, triethylene glycol, urea, glycerol, glycerol triacetate, 1 : 4-butane diol, 1 : 5-butane diol, hexane triol, sulpholane and dimethyl-sulpholane.  Suitable dyestuffs are those described in Specifications 576,270, 587,636, [both in Group IV], and 613,980. The compositions may be applied by spraying, painting or printing by the hand-block, screen or roller techniques.  Suitable precipitating agents are alkalis, thiocyanates, aromatic sulphonic acids and their salts, sulphated and sulphonated long chain compounds, perborates, cyanides and neutral or acidified chromates, examples of which are given.  The compositions may be printed alongside vat dyestuffs.  Examples describe the printing of cotton. Specifications 633,160, 686,036 and 707,557 also are referred to.
Patent GB-276178-A (GB)
Title: Improvements in licence holders for motor vehicles
IPC: B60R7/04
Filed: 1926-10-11
Abstract: 276,178. Panzetta, H. Oct. 11, 1926. Label holders. - A licence holder for motor vehicles is formed entirely of india - rubber, and comprises a frame 1 adapted to be secured by adhesive to a windscreen 2, and a central part 4 which bears on the back of the licence disc. The central part 4 is cut away from the frame 1 for half its circumference to form a flap which can be raised by a tab 6 for the insertion of the disc, the flap being normally held under the frame edge as shown in Fig. 3. A celluloid disc may be inserted in front of the licence. In a modified construction the frame is shaped to fit a corner of the windscreen to facilitate cleaning.
Patent GB-1119340-A (GB)
Title: Apparatus providing compensation for changes in physical characteristics of a magnetic core
Inventor: BIRT DAVID ROBIN
IPC: H01F21/08
Filed: 1967-06-01
Abstract: 1,119,340. Automatic frequency control systems; phase discriminators; frequency modulation. REDIFON Ltd. 1 June, 1967, No. 25256/67. Headings H3A and H3R. The resonant frequency of a tuned circuit, which in Fig. 1 determines the centre frequency of a frequency-modulated oscillator 20 and in Fig. 4 (not shown) determines the rejection frequency of a filter, is maintained constant in spite of variations of the permeability of the magnetic core 16 of the inductance 17 of the tuned circuit, by means of auxiliary windings 21, 22 on the same core which form part of the tuned circuit of an oscillator 27 locked to the frequency of a crystal oscillator 29 by an automatic frequency or phase control loop, the error voltage in the loop being applied (through lead 30 in Fig. 1) to a varactor diode included in the tuned circuit. In Fig. 1, the oscillator 20 is frequency-modulated by an audio signal, e.g. a two-tone signal, supplied through an amplifier 32. Phase discriminators.-A phase discriminator comprises a transistor (103, Fig. 3, not shown) biased to be non-conductive except on negative half-cycles of an input signal applied to its base. Its collector is connected to an output terminal (30) through a diode (119) which is non-conductive except during positive halfcycles of a second input signal applied to the diode. Frequency modulation.-A Colpitts oscillator (Fig. 2, not shown) includes in its tuned circuit a varactor diode (52) reverse biased by a potential divider (56-58) connected across the power supply, the diode being connected to an A.F.C. input terminal (30) and to a modulation input terminal (31); the modulation may be a twotone signal.