baber/WOPTO huggingface dataset:
Patent GB-723510-A (GB)
Title: Improvements in or relating to circuit-arrangements comprising means for the periodic interruption of a current supplied to an inductance coil
IPC: H03K4/28
Filed: 1952-12-16
Abstract: 723,510. Converting. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 16, 1952 [Dec. 19, 1951], No. 31847/52. Class 38 (2). In a circuit in which a load 9 such as the anode of a C.R.T. is supplied with direct voltage obtained by rectification by diode 7 of the output of a transformer 2, the supply to whose primary winding is periodically interrupted, e.g. by feeding a saw-tooth voltage to the grid of a valve 1 in the circuit of the primary winding, the undesirable effect of oscillations occurring in the deflection coils 14 after current interruption is avoided by arranging the transformer to have leakage inductance of a definite value greater than zero. In the equivalent circuit diagram of Fig. 2, L1, C1, L2 and C2 are the transformer inductance, transformer capacitance, transformer leakage inductance, and load circuit capacity referred to the primary side. The leakage inductance is chosen to have such value that the current through it (as represented in Fig. 2), and its first derivative are zero. It is arranged that where α and # are the two parallel resonance frequencies of the equivalent circuit, and Z is the ratio between the time of interruption and the period of a complete cycle. The leakage inductance may be made variable by connecting a variable inductor 19 between tappings on the transformer winding.
Patent GB-639236-A (GB)
Title: Improvements in roll-feeds for power presses
IPC: B21D43/09
Filed: 1947-12-03
Abstract: 639,236. Feed mechanism for mechanical presses. TURNER BROS. (BIRMINGHAM), Ltd., and BLACKMORE, E. J. A. Dec. 3, 1947, No. 31879. [Class 87 (ii)] [Also in Groups XXII and XXIV j Mechanism for driving feed rolls for feeding strip stock into a press comprising a one-way clutch operated through a connecting-rod from a crank disc or the like on the main driving shaft of the press, is characterised by the provision of step-up gearing between the connecting- rod and the one-way clutch. Feed rolls 16 disposed on each side of a press 15 are driven from shafts 22 extending from the rolls one along each side of the machine to the rear, where they are driven from a shaft 26 through bevel gears 24, 25. Over-running of the rolls is prevented by means of brakes 47. At one end the shaft 26 has an extension 28 on which is mounted a ratchet wheel 30 surrounded by a pawl drum 29. Rotatably mounted on the extension 28 adjacent the pawl drum and connected thereto is a sun gear 33 and a casing 34 which surrounds the sun gear and within which is mounted on a spindle 37, a half planet gear 35 meshing with the sun gear. The outer end of the spindle 37 is non- rotatably connected to the forked end of a rod 10 which is reciprocated by means of a crank disc 11 on the main crank shaft of the press. If it is desired to operate the rolls 16 without the step-up gearing 33, 35, the half gear is turned through 180 degrees so that it does not engage the gear 33, and the spindle 37 is moved longitudinally so that it projects into a hole 46 in the pawl drum which is thus directly operated from the connecting rod 10. The top roll of each pair is given an automatic lifting movement by means of a rod 17, rock shaft 18 and arm 19 operated by a cam on the main crankshaft.
Patent GB-1140764-A (GB)
Title: Vulcanisable liquid polymers and their preparation
IPC: C08C19/32
Filed: 1966-07-15
Abstract: 1,140,764. Telomers. POLYMER CORP. Ltd. 15 July, 1966 [9 Aug., 1965 (2)], No. 31951/66. Heading C2C. [Also in Division C3] Compounds of the formula X(Y)Z, where X is Br, I or Cl; Z is -CBr 3 , -CCl 3 , -CI 3  or > CI 2 ; and Y is a divalent radical having the propylene skeleton, optionally substituted at the 1 or 2 positions by a radical R which is a divalent hydrocarbon or substituted hydrocarbon radical having a molecular weight of up to 1000 the group X being attached to the 3 position of the propylene skeleton and the group Z being attached to the terminal carbon atom of the group R if present or otherwise to the 1 or 2 position of the propylene skeleton, any substituents on R or the propylene skeleton being non reactive, may be prepared by polymerizing an acyclic diolefinic hydrocarbon e.g. butadiene-1,3 in the presence of a tri- or tetrahalogen substituted methane and a free radical catalyst.
Patent GB-932297-A (GB)
Title: Improvements in methods of and apparatus for contacting gases with solids or liquids
IPC: B01D1/18
Filed: 1959-09-18
Abstract: In a method of contacting a gas with a solid or liquid material in the form of discrete particles, the gas is passed at high velocity in streamline flow through a convergent passage and the material to be contacted with the gas is introduced into the passage in a direction transverse to the flow of the gas and at a velocity insufficient to destroy the streamline flow of the gas whereby the particles of the material are entrained by the gas. Liquid materials may be sprayed into or injected into the gas stream in sheet form which is broken up by the gas stream.  The temperature of the gas may be elevated temperature with respect to the solid or liquid material and the method employed to heat a solid or liquid material and cool the gas, to spray dry a liquid containing solid material or to dry a wet solid material such as coal.  The spray-drying of skim milk, molasses and blood, and of solutions or slurries of sodium bichromate, sodium carbonate, and polyvinyl chloride, is referred to.
Patent GB-1446512-A (GB)
Title: Apparatus for reading coded information carried on the surfaces  of movable objects
IPC: G06K7/10
Filed: 1974-07-19
Abstract: 1446512 Code reader FERRANTI-PACKARD Ltd 19 July 1974 [27 July 1973] 31997/74 Addition to 1417439 Heading G4M The code reader of the parent Specification 1,417,439 contains a circuit compensating for base level variations in the television camera which scans an area through which a coded label passes. The video signal S, which has a tendency to rise above the base level (Fig. 7) possibly to a level higher than a data level is fed to one terminal of an A/D converter and also to an amplifier 03. The amplifier compensates for losses in the following circuitry and clips noise peaks. The amplifier feeds a peak clipper 04 which via a rectifier 05 feeds capacitor 06 and resistor 07 forming a peak follower. The input to the potentiometer O8 is represented by dotted line D in Fig. 7 and its output is dotted line PL. This is fed to the A/D converter which produces true and inverted outputs D, I forming binary signals indicating when line PL is above or below line S or vice versa. Alternatively the video signal is fed to a differentiating circuit 30 which via diodes 32, 34 feeds level discriminator 38 and via an inverter level discriminator 39. These discriminators are responsive to pulses from the differentiator responding to transitions in the video signal at the boundaries between light and dark markings on the label. The discriminators set and reset a flip-flop to produce binary pulses.
Patent GB-648904-A (GB)
Title: Process for the manufacture of 2:4:5-triamino-6-hydroxy-pyrimidine
Filed: 1947-12-04
Abstract: 2 : 4 : 5 - Triamino - 6 - hydroxy - pyrimidine is prepared by reacting 2 : 4-diamino-5-nitroso-6-hydroxypyrimidine with hydrogen and a hydrogenation catalyst in the presence of an aqueous alkali, e.g. aqueous sodium or potassium hydroxide.  Suitable hydrogenation catalysts are palladium, platinum oxide, platinum, Raney nickel or a combination of said catalyst with a carrier, e.g. activated charcoal. The reaction may be carried out at a temperature up to 75 DEG  C. The product may be isolated as a mineral acid salt by adding a mineral acid to the reaction product freed from the catalyst e.g. as the sulphate.  A number of examples are given.
Patent GB-1153595-A (GB)
Title: Method of Sizing Yarns or Fabrics
Inventor: HARTEL HEINZ
IPC: D06M15/263
Filed: 1966-07-15
Abstract: 1,153,595. Sizing yarns and fabrics. DYNAMIT NOBEL A.G. 15 July, 1966 [16 July, 1965], No. 32020/66. Heading D1P. Yarns and fabrics made for example from synthetic polyamide, polyester or polyacrylonitrile fibres, are sized by treating them with an aqueous solution of a salt of a polycarboxylic acid derived from the product obtained by the oxidation of a polyaldehyde having a molecular weight of 1,000-50,000 and formed by the polymerisation of an unsaturated aldehyde, the oxidation being effected in an alkaline medium and being such that 70-98% of the aldehyde groups of the polyaldehyde are oxidised. The polyaldehyde may be polyacrolein, polymethacrolein or a copolymer of acrolein and methacrolein and the salt of the partially oxidised polyaldehyde may be a sodium, potassium, ammonium or aliphatic amine salt. The aqueous solution may be an aqueous alcoholic solution. The solution may also contain polyacrylates and butyrates of polyacrolein - formaldehyde condensation products.
Patent GB-826305-A (GB)
Title: Process for refining coke-forming hydrocarbon distillates
IPC: C10G65/06
Filed: 1957-10-15
Abstract: Coke-forming hydrocarbon distillates are hydrofined at a pressure above 6.8 atmospheres in the presence of a catalytic composite of alumina, an oxide or sulphide of molybdenum and an oxide or sulphide of an iron group metal in two stages.  In the first stage the distillate is preheated to 150 DEG  to 232 DEG  C. without permitting the temperature of the film of distillate in contact with the heater surface to exceed 288 DEG  C. and the hydrofined at 150 DEG  to 232 DEG  C., preferably below 205 DEG  C.  In the second stage to temperature of the distillate is increased to 288 DEG  to 427 DEG  C. and it is again hydrofined at this temperature.  As the saturation of coke-forming hydrocarbons in the first stage is an exothermic reaction the feed may be split and fed into various portions of the reactor to prevent local excesses of temperaature.  Internal quench streams may also be used.  In the catalyst composite the alumina may be combined with silica, magnesia, zirconia, thoria or boria and the iron group metal may be iron, cobalt or nickel. In examples, (i) a 80-161 DEG  C. coke oven light oil is hydrofined over a sulphided composite of cobalt and molybdenum oxides on alumina at 54.3 atmospheres with an hydrogen circulation of 87.22 litres/litres, a first stage temperature of 191 DEG  C. and a second stage temperature of 371 DEG  C.; (ii) a 40-171 DEG  C. steam-cracked light oil was similarly hydrofined except that the hydrogen circulation was 178 litres/litres and the temperatures 216 DEG  and 371 DEG  C.
Patent GB-1436174-A (GB)
Title: Surgical sewing materials
IPC: D01F6/18
Filed: 1973-07-05
Abstract: 1436174 Polyacrylonitrile monofilaments CESKOSLOVENSKA AKADEMIE Ved 5 July 1973 [14 July 1972] 32142/73 Heading B5B [Also in Divisions B8 and C3] A polyacrylonitrile monofilament comprises a partially hydrolysed monofilament of a block copolymer polyacrylonitrile having a water content at swelling equilibrium of between 30 and 60% by wt. and an elastic elongated, when oriented of between 10 and 50% of its rest length. Preferably acrylonitrile is polymerized in concentrated nitric acid at 10- 40‹ C. and the subsequent partial hydrolysis effected at -10‹ to +50‹ C. over a period of days, the polymer solution then being spun through air into a coagulation liquid, e.g. water, diluted HNO 3  or a mixture of water and a C 1  to C 4  aliphatic alcohol or glycol, followed by washing and stretching to orient the fibre.
Patent GB-534785-A (GB)
Title: Sectional scaffolds
IPC: E04G1/14
Filed: 1939-12-13
Abstract: 534,785. Scaffold frames. SAFWAY STEEL SCAFFOLDS CO. Dec. 13, 1939, No. 32147. Convention date, June 16. [Class 20 (ii)] A scaffolding of the kind comprising superposed end frames which are interconnected by diagonals, has each end  frame formed of a horizontal bar 16 connected at each end to the upper end of an upright 15, the frame being stiffened by a brace 17 which is, connected to each upright intermediate of its ends and passes across the frame just below the horizontal bar. The brace is connected to the horizontal bar and the uprights by shear members 18 and the uprights are provided with screwed studs 20 to receive the ends of the longitudinal connectors for the scaffold. The uprights are connected by flanged spigots 12 and may support ladders by brackets 26 resting on the horizontal bars.
Patent GB-987915-A (GB)
Title: Production of 2,4-diamino-6-hydroxypteridine
IPC: C07D475/08
Filed: 1962-08-22
Abstract: 2,4 - Diamino - 6 - hydroxy - pteridine or an acid addition salt thereof is made by reacting 2,4,5,6 - tetra-aminopyridine or an acid addition salt thereof with free glyoxylic acid in the presence of dilute mineral acid, i.e. below 6N. Specification 987,916 is referred to.
Patent GB-449681-A (GB)
Title: Improvements relating to display shelving and the like
IPC: A47B57/20
Filed: 1935-11-09
Abstract: 449,681. Shelves. PARNELL & SONS, Ltd., Soho Foundry, Birmingham, and GABB, A. H., 3, Western Road, Horfield, Bristol. Nov. 9, 1935, No. 32390 /34. [Class 52 (i)] A facing strip 11 for a shelf has inturned ends with holes to accommodate a bar 6 by which the front of the shelf is supported from uprights 5.
Patent GB-840265-A (GB)
Title: Improvements in or relating to compounded single-phase or polyphase alternating current generators
IPC: H02K19/30
Filed: 1957-10-17
Abstract: 840,265. Alternators; converting. KELLMA A.B. Oct. 17, 1957 [Oct. 31, 1956], No. 32469/57. Classes 35 and 38 (2). A single or polyphase alternator is compound excited by means of a resistance or inductance divider connected to a rectifying commutator connected to the alternator shaft. The divider has a number of equal inductances or resistances equal to half the number of segments per phase of the commutator, the segments being connected in opposite pairs to the divider terminals, and each phase-group of segments being connected to a separate divider. As shown for a single-phase alternator, the rotor winding 3 is energized from a pair of brushes 8 rotating over commutator segments 6 connected to the stator windings 2, 11 and to a resistance divider 5. Except for the segments at either side which are connected to the ends of the divider, the segments are joined in pairs by equalizing connections 10. The terminals of the divider are connected to contacts 12 which may be selectively engaged by pairs of contacts 15, 16 so that the machine load current and a voltage component may be caused to pass through part or all of the divider to produce any desired compounding effect. The coil 11 which provides the no-load voltage component is offset from the centre of the winding to provide greater variation of voltage control. It is described how the principle may be applied to alternators having a greater number of poles or phases. A transformer may be interposed between the alternator and divider. Specification 783,686 is referred to.
Patent GB-307320-A (GB)
Title: Positive actuation of valves for petrol engines
IPC: F01L1/30
Filed: 1927-12-02
Abstract: 307,320. Mason, W. H. Dec. 2, 1927. Valve gear. - The valves are positively actuated by grooved cams formed in the timing - gears, springs being fitted for ensuring the closing of the valves. In the sidevalve gear shown at the left side of Fig. 2, the timing - wheel (not shown) mounted on the axis 2 is formed with a cam groove engaging a tapered pin 4A on the tappet 4, the upper end of which carries a nut 7 engaging the valve stem. A spring 9 is mounted around the valve stem between plates 9<A>, the upper one of which bears against a washer 10 having rod extensions 8, which pass through the spring and the plates 9A and have hooked lower ends engaging under a washer 8A secured to the tappet. The spring is unstressed during valve-opening, but is stressed by the pull of the tappet at the conclusion of its closing movement. In the application to an overhead valve shown on the right side of Fig. 2, the grooved cam on the axis 2A actuates a rocker 5, tappet rod 6, and a rocker 12 which engages the lower plate of the spring 13.
Patent GB-999747-A (GB)
Title: A device for nailing slats on to cable drums
IPC: B65H75/14
Filed: 1963-08-16
Abstract: 999,747. Packaging. COMPAGNIE GENERALE D'ELECTRICITE. Aug. 16, 1963 [Sept. 21, 1963], No. 32578/63. Headings B8C and B8M. In a semi-automatic device for nailing protecting slats and binding strips on to a drum loaded with cable, the drum is placed on two supports at least one being adjustable and is turned about its axis intermittently by a wheel with a pneumatic tyre resting on one side of the drum and connected to an electric motor to present the slats to automatic nailing means, the electric motor being started by the introduction of a slat and the nailing means being operated by the stopping of the electric motor. The drum 1 is hoisted on to supports 4, the axle 6 being supported at each end on a slide box 7 by means of rollers 8. The drum is rotated by a wheel 15 connected to an electric motor 14 and on the other side of the drum is a wheel 16 and a stop 17 for preventing the slats from projecting laterally of the drum. The rollers 8 are mounted in a member 23 slidable on needle bearings 24. This arrangement permits the drum to move axially due to axial irregularities in its flanges so as to maintain the flanges aligned with the nailers at the nailing position. The slats 2 are inserted in position either manually or automatically. A switch with a slat contacting arm 21 is mounted on a feeler 20 spring loaded to compensate for any variations in diameter of the drum flange. The switch initiates operation of the nailers 10 and the motor 14. The first slat is positioned by removable means (not described) and secured. When a second slat 2<SP>1</SP> is inserted, it operates the arm 21 to close the switch 19 and thus rotate the drum a distance equal to the width of a slat. The switch is opened when the lever 21 reaches the end of the slat and then initiates operation of the nailers 10 which fix the slat to the flanges and also secure a binding strip 12 to the slat. The binding strips are fed from reels 13.
Patent GB-190629-A (GB)
Title: Improvements relating to railway point detecting apparatus
IPC: B61L5/10
Filed: 1921-12-05
Abstract: 190,629. Siemens Bros. & Co., Ltd., and Ferreira, L. de M. G. Dec. 5, 1921. Interlocking points and signals.- An electric contact point detector comprises co-operating rotary cams 12 operated by the points blades and a cam operated by the locking bolt, against which abut rollers 19 carried by the contact arms 14, 15. which are drawn inwardly by springs 35, but can only move inwards when cut away or notched portions 33, 38 of the cams are in alignment with the rollers. The cams are mounted on concentric sleeves, and a shaft 1. A rib 39 on the cams serves to lift oil from the casing 3 to the spindle and sleeves.
Patent GB-175738-A (GB)
Title: Improvements in or relating to the cylinder liners of internal combustion engines
IPC: F02B75/02
Filed: 1920-11-18
Abstract: 175,738. Swan, Hunter, & W. Richardson, Ltd., Rowntree, F., and Helyavin, P. Nov. 18, 1920. Turning.-In order to avoid stress set up by the unequal expansion of the flange c<3> of an engine cylinder liner C the fiance is made as small as possible and as the diameter of the casing A must be large enough to pass the belt c<2> containing the exhaust port c, the flange is supported by a ring D which rests on the casing. The ring is preferably cast in situ on the liner and separated therefrom by turning away the metal d<2>, Fig. 2, shown between the dotted lines x, x<1>.
Patent GB-604788-A (GB)
Title: Improvements in or relating to driving means for motorized bicycles and the like
IPC: B62M9/00
Filed: 1945-12-03
Abstract: 604,788. Driving means for cycles. PRESTWICH, J. A. Dec. 3, 1945, No. 32642. [Classes 79 (iii)] In cycles driven through a friction drum in contact with the tyre, the periphery of the drum is provided with a plurality of recesses closed at their inner ends and adapted to be closed at the mouth by contact with the tyre. As shown the drum A has a concave periphery D formed with a series of recesses B whose ends C are closed, e.g. as formed by a drill. The recesses are suitably spaced and staggered and 'when the drum is in driving contact with the tyre the recesses provide a suction effect, thus creating better adhesion. Specification 592,878 is referred to.
Patent GB-437147-A (GB)
Title: Improvements in brassieres
IPC: A41C3/00
Filed: 1934-11-13
Abstract: 437,147. Brassieres. SOC. CADOLLE FRERES, 261, Rue St. HonorÚ, Paris. Nov. 13, 1934, No. 32671. Convention date, Jan. 29. [Class 141] The breast pockets of a brassiere are each cut to such a pattern, shown in Fig. 1, that the upper edge B<1> is parallel to one straight F<1> of the fabric, and that two darts, cut in approximately perpendicular directions, have each one edge, P<1> and P<2>, parallel to a straight, F<1> and F<2> respectively, of the fabric. When the edges of the darts have been sewn together as in the completed garment, one dart is directed from substantially the centre of the breast pocket towards the lower edge thereof, whilst the other dart is directed from substantially the centre towards the outer side edge of the pocket to which the side strap D of the brassiere is attached. The middle seam connecting the edges B<2> of both pockets is gathered as at F, and its lower part is concealed by a strip P.
Patent GB-325293-A (GB)
Title: Improvements in receptacles for use in the electric heating of liquids
IPC: A47J27/21
Filed: 1928-11-12
Abstract: 325,293. Henning, H. H. Nov. 12, 1928. Divided on 325,258. Heating by electricity. - An insulating receptacle 1 has an insulating lid 5 movable horizontally and an open-ended recess 6 on the rear side of the lid carrying electric conductive means 8 coupled to electric conductive elements situated inside the receptacle. The lid is mounted on a pivot pin 4 and the conductive elements comprise electrodes as described in Specification 325,258. When the supply socket 9 is in position the lid cannot be opened.
Patent GB-630143-A (GB)
Title: Improvements relating to electric lamp holders and fittings
IPC: H01R33/08
Filed: 1946-11-05
Abstract: 630,143. Lamp-holders. MASON, G. R., and METROPOLITAN - VICKERS ELECTRICAL CO., Ltd. Nov. 5, 1946, No. 32857. [Class 38 (i)] A holder for a double-ended fluorescent lamp 1 comprises a cylindrical insulating body 4 having sockets 5 for the lamp pins 3 and transversely-extending pins 6, or sockets, housed in a recess 10 in the end of the body and connected with the sockets 5, the said pins 6 or sockets engaging sockets 8, or pins, carried by a base 9 which may form part of a reflecting fitting 11. A skirt 7 on the body shrouds a lamp cap 2 and the holder is locked in the base-member by a pin 12 passing through the body and having notches 13 which engage spring means on the base. The co-operating contacts in the base member and the holder are loosely mounted to allow for normal variations in the length of the lamp.
Patent GB-1150628-A (GB)
Title: Machine and Apparatus for Detecting Faults in Yarns or Threads
IPC: B65H63/06
Filed: 1966-07-21
Abstract: 1,150,628. Electro-physical measurement - detecting faults in yarn. HEBERLEIN & CO. A.G. July 21, 1966 [July 23, 1965], No.32905/66. Headings G1A and G1N. In yarn fault testing apparatus the signal from an optical or capacitor measuring head is integrated in a transistor integrator circuit to provide a "fault volume" signal for controlling the yarn clearer. The signal from the measuring head is applied at 4 to transistor 1 with an integrator feedback capacitor 6. When the integrated signal exceeds the fault-volume bias-U V  diode 7 is unblocked to provide a control signal. Compensation for yarn speed may be provided by a potentiometer in the supply to the fault volume bias, or by a rotatable scale co-operative with the pointer of the faultvolume-potentiometer to adjust its datum.