baber/WOPTO huggingface dataset:
Patent GB-293723-A (GB)
Title: Improvements in the evacuation of vacuum electric tube devices
IPC: H01J9/38
Filed: 1927-03-11
Abstract: 293,723. Robinson, E. Y., and Metropolitan-Vickers Electrical Co., Ltd. March 11, 1927. Vacuum tubes.-In the evacuation of vacuum tubes with oxide or other thermionic cathodes, one electrode only, for example the cathode, is first heated, after the tube has been pumped and sealed, to drive off gas therefrom and during or immediately subsequent to this heating a metallic getter, not on the cathode, is heated to combine with the evolved gas, another electrode such as the anode being then heated to drive off gas which is absorbed by a heated metallic getter during or subsequent to the heating of the anode. Two separate getters independently heated preferably by different heating means may be employed. Two discs not forming parts of electrodes and carrying getters may be located at different ends or sides of the tube or at rightangles : either or both may have several pieces of magnesium welded on. When an indirectlyheated cathode, such as a nickel tube coated with barium and strontium oxide and heated by radiation or conduction from a heater or by electron bombardment from an auxiliary cathode, is used, the cathode is originally coated with carbonate and is heated by an electric current to form the oxides after pumping the vacuum tube without heat-treating the electrodes and after sealing. The carbon dioxide is absorbed by magnesium supported on a disc and heated by high-frequency induction with or without vaporization and without heating the electrodes. The gas pressure is thus reduced to 0.1 mm. and the anode is then heated by electron bombardment to a dull, redheat to drive out occluded gases and to vaporize one or more pieces of magnesium welded to the anode. A final clean-up of gas may be produced by the vaporized magnesium or by lime on the pinch under the influence of positive-ion bombardment when the device is operated at normal or higher voltages. Reference has been directed by the Comptroller to Specifications 151,611, [as open to inspection under Sect. 91 (3) (a) of the Acts], and 231,467.
Patent GB-448535-A (GB)
Title: Improvements in or relating to the manufacture of pistons
IPC: B22D15/02
Filed: 1935-03-05
Abstract: 448,535. Moulding-machines. SMITH, C. R., and SMITH, A. B., The Foundry, Stewart Street, Wolverhampton. March 5, 1935, No. 6838. [Class 83 (i)] A core n is concentrically positioned in the cavity f of a sand or metal mould r by means of a table a, with locating pins c, and a pneumatic or spring-pressed gauge e shaped to fit the core. This is pressed in by a plunger o, with a powerful spring p or a pneumatic piston, until its print m engages a corresponding face k of the mould. The plunger o and gauge e are then withdrawn, as by levers i and the mould is lifted off and completed by inserting a mould part to fill the bottom opening. This part, or the print m, may be formed with gates for the molten metal. If the mould is of sand the gauge e has an extension e<1> to position the upper end of the core and a fixed stop t is provided. The gauge may be divided longitudinally to form fingers. If the mould has a number of cavities f it may be moved to bring each, in turn, over the gauge or the table may be provided with a number of gauges.
Patent GB-525898-A (GB)
Title: Improvements in or relating to the drawing of sheet glass from the molten mass
IPC: C03B15/06
Filed: 1939-03-02
Abstract: 525,898. Drawing sheet glass. DEUTSCHE TAFELGLAS AKT.-GES. (DETAG.). March 2, 1939, No. 6899. Convention date, April 2, 1938. [Class 56] Relates to the method of drawing sheet glass in which coolers 9 are placed opposite the lower part of the sheet 8, on both sides, for the purpose of solidifying the glass. According to the present invention, the coolers are arranged above the meniscus 7 away from the surface of the molten glass 1, and the radiation of heat from the outer layers of the sheet just above the meniscus, where the glass is still plastic, is retarded or counteracted, in order to avoid or reduce the formation of waves in the sheet. The sheet is drawn upwards from a debiteuse 2, or any other known device for anchoring the meniscus, and passes between water-cooled radiators 9 which are adjustable relatively to the sheet and may be tilted, as shown. Loss of heat from the lower part of the sheet is retarded by currents of hot air from perforated pipes 10 which are arranged to direct the air towards the outer edges of the debiteuse, so that it is further heated as it passes upwards over the meniscus 7 and the sheet. Instead of air, hot gases from the body of the furnace, or combustible gases, may be passed through the pipes 10. Electric heaters may be arranged to radiate heat on to the sheet. Smoky air may be used to assist in observing and adjusting the direction of the air currents.
Patent GB-512454-A (GB)
Title: Improvements in or relating to motion picture apparatus
IPC: G03B1/56
Filed: 1938-03-04
Abstract: 512,454. Kinematograph apparatus. KODAK, Ltd. (Kodak Akt.-Ges.). March 4, 1938. No. 6906. [Class 97 (i)] A film gate comprises a film guide member, a backing plate, and an intermediate pressure member, capable of being assembled together and held as a unit which is slidable into position in the apparatus, without manipulation of springs, and is securable by readily releasable means. Fig. 5 shows a film guide member 5, a pressure plate 6 and a backing plate 7. which, when assembled, form the gate unit. The member 5 comprises two plates 8, Fig. 5, and 9, Fig. 6. which are screwed together and are formed with exposure apertures 10, 11, a claw slot 13, and an aperture 12 permitting operation of the claw mechanism. An aperture plate 15 is adjustable relatively to the aperture 11 by a lever 16, for framing. The pressure plate 6 is formed with a flange 17, and with extensions 21, 22, to locate it. The flange 17 abuts against a flange 7' on the plate 7. and the wall between the plate 6 and the flange 17 is pressed against a plate 18 by a spring 20; the extensions 21, 22 engage above and below guide posts 23, 24. The backing plate 7 is held on the posts 23, 24 by key-hole slots 26, 27 engaging pins 28, 29 on the posts. The assemblage is mounted in a projector, as shown in Fig. 4, between a partition plate 4 and the lens support 1, and is held in place by a pin 33 on the plate 4 engaging a slot 31 in the plate 7, a pin 33 engaging an aperture in a flange 34 on the plate 9, and a member 36 engaging a slot 30 in the member 5. The member 36 forms a coned end on a screw 35 passing through the support 1 and provided with a handle 39. Rotation of the handle from the full line to the broken line position, when the lens 3 is removed from the support 1, tightens the end 36 onto the edges of the slot 30, and the lens, when inserted in the support 1, prevents return movement of the handle 39. Specification 512,453 is referred to.
Patent GB-577249-A (GB)
Title: Method of producing dies by powdered metallurgy
IPC: B22F5/00
Filed: 1944-04-15
Abstract: 577,249. Sliding-clasp fastenings. PLASCO, Ltd. April 15, 1944, No. 6996. Convention date, March 24, 1943. [Class 44] [Also in Groups II and XXII] Dies for casting the links 11, Fig. 2, of sliding-clasp fasteners, are made from an original pattern die by die casting or pressing metal powder to form a negative of the impression surface thereof, and using this negative to form a pressed powdered-metal positive. The link 11 shown combines a male part 16 and corresponding female part 17 so that both sides are identical and the dies to form them comprise two identical parts 20, Fig. 1. Knobs 18 and corresponding holes or recesses may also be formed in the links, the latter by a core 19 inserted through recesses 25 of the dies 20, Fig. 3, and the former by projections 29. The surfaces 30, of the original pattern die are milled away to leave raised walls 27, 28 which are reproduced in the final dies, thus avoiding fins on the cast links 11. One of these original die parts 20 is mounted on a backing 31, Fig. 6, so that its impression face 21 forms part of a mould cavity into which zinc alloy, silicon bronze &c. 38 is cast. This casting may be brazed or otherwise fixed to a plunger 39, Fig. 8, of the same cross section which is then forced into a housing 40 containing metal powder 41 resting on an ejector 42. The separated pressing 41 is then sintered, hardened, and, if required, polished to form a final die. If 'the pressing is to be handled much the casting 38 is not fixed to the plunger 39 but is removed from the housing 40 with the pressing and placed in the sintering furnace where the part 38 melts as it has a lower melting point than the pressing 41. If the negative is formed from metal powder it may be done as in the case of the final die.
Patent GB-744315-A (GB)
Title: Improvements in or relating to electron tubes
IPC: H01J21/14
Filed: 1953-03-13
Abstract: 744,315. Thermionic valves. WALLMARK, J. T. March 13, 1953 [March 14, 1952], No. 7027/53. Class 39 (1). In a " space-charge deflection valve " of the kind described in the Proceedings of the Institute of Radio Engineers, Volume 40, pages 41-48, current and voltage conditions in the deflection space are chosen so that the " beam deflection transconductance " decreases with increasing current and that the total transconductance (which is the product of the beam deflection transconductance and the " beam current transconductance " which necessarily increases with increasing current) is, over a substantial region, independent of beam current. This is shown'in Fig. 5, in which beam current transconductance g<SP>1</SP>m, beam deflection transconductance g<SP>11</SP>m, and total transconductance g m , are plotted as a function of #, the ratio of the actual current to the maximum current at which a virtual cathode forms at the reflector. The valve comprises cathode 1, control grid 2 and screen grid 3, which produce two symmetrical beams travelling within deflection electrode 5 to the output system consisting of interceptor 6 and anode 7 with or without dynode 8 and focusing members such as 9. The beam 4 is reflected to an extent which depends upon the space charge and thus the distribution of the beam between electrode 6 and 7 depends upon the current variation produced by grid 2, and assists it. The conditions under which the total transconductance is rendered independent of the beam current and hence of undesired fluctations in working conditions is explained in detail with reference to diagrams. Generally, # is between 1 and 2, so that a virtual cathode is present at the reflector; and the ratio of voltage on electrode 3 to the absolute value of the negative voltage on 5 is best at about 0.005 and ceases to be useful above 0.25.
Patent GB-1383234-A (GB)
Title: Isolation transformer
Inventor: BREGEL H
IPC: H01F27/32
Filed: 1972-02-16
Abstract: 1383234 Transformers SCHUTZAPPARATE-GES PARIS & CO mbH KG 16 Feb 1972 [17 Feb 1971) 7063/72 Heading H1T The creepage distance between the primary 2 and secondary 3 of a transformer, having the windings disposed on axially aligned formers 21, 31, is increased by the provision of an insulating foil member 4 having a flange 41 parallel to the coil axis.
Patent GB-380096-A (GB)
Title: Valve operating mechanism for dry gas meters
IPC: G01F3/22
Filed: 1931-03-06
Abstract: 380,096. Gas meters. BINGHAM, J. H., The Wakehams, Dorney Common, Buckinghamshire, and GLOVER & CO., Ltd., G., Ranelagh Meter Works, Royal Avenue, Chelsea, London. March 6, 1931, Nos. 9098 and 13651. [Class 54.] In dry gas meters, in which the valves 13 move on centre lines intersecting at right-angles at the axis 10 of the valve operating spindle, which is driven through a crank 22 by oscillatory arms 15, 16 moved by the meter diaphragms, the angle subtended at the axis of the spindle by a line joining the axis 17, 18 of the oscillating arms is not a right-angle and the diaphragms are moved with a difference of phase of 90‹ on the path of the crank 22 driven by the oscillating arms, so that reversal of each valve takes place simultaneously with reversal of the direction of movement of the corresponding arm. Fig. 1 shows the known arrangement, the rods 17, 18 carrying lateral arms 23, 24 connected to the centre plates of the diaphragms the crank pin 21 being connected to the arms 15, 16 by links 19, 20, and the valves being operated through rods 14 by a crank 12 on the spindle 10. Fig. 3 shows one form according to the invention, in which the arms 15, 16 oscillate on stub shafts 17a, 18a displaced towards the left, extensions of the chords of the arcs moved through by the connections 25, 26 of the arms to the links 19, 20 intersecting at right-angles at the point 10. The oscillating rods 17, 18 are connected to the arms 15, 16 by arms 27, 28 and links 30, 31 forming parallel motion linkworks. The arms 15, 16 may be mounted to oscillate independently about a single pivotal support, Fig. 5 (not shown). Fig. 4 shows a form in which the arms are connected to separate crank pins 21, 21a, the crank arm 22 having an offset arm 34, or a double crank may be used. The pins 21, 21a are, with the parts in the position shown by the full lines, placed equidistant from a line 32 drawn at 45‹ to the perpendicular to the line 17, 18 through the centre 10. Fig. 7 shows a form similar to Fig. 4, in which the links 19, 20 are dispensed with, the arms 36, 37 being slotted and engaging separate crank pins 21, 21a. In the modification shown in Fig. 8, an auxiliary spindle 40 carries the crank arm 22 and is connected to the spindle 10 by toothed gearing 41, 42, 43. The idle wheel 41 may be carried on a quadrant or arm so that its position can be altered, or coupling rods, chain or belt gearing may be used.
Patent GB-102883-A (GB)
Title: A Device for Placing in the Aperture of A Money Box or other Receptacle to Prevent Coins or other Articles being Abstracted therefrom.
IPC: A45C1/12
Filed: 1916-05-18
Abstract: 102,883. National Institute for the Blind, and Howlett, A. E. May 18, 1916. Fraud, preventing.-A fraud. preventing device for affixing under the slots of letter-boxes, money-boxes, and coin or check operated machines consists of a flexible plate slotted to form prongs C<3>.
Patent GB-651805-A (GB)
Title: Improvements in malting plants
Inventor: HEIDENSTAM ERIK JOHAN VON
IPC: C12C1/15
Filed: 1948-03-08
Abstract: In the malting plant of the parent Specification the p  mechanical power operated means for conveying the grain under malting consists of a rotary drum provided with shovels and built up of a plurality of rings through which a horizontal belt conveyer is passing and on which belt the shovels unload grain to be transferred laterally to an adjacent compartment in the plant. The preferred embodiment comprises a drum which elevates the grain and then allows it to fall on to a conveyer as described in Group XXX.
Patent GB-793079-A (GB)
Title: Improved grease
Inventor: CLOGG ALAN DAVID
Filed: 1956-03-07
Abstract: Lubricating grease compositions comprise a lubricating oil, a grease-making proportion of a calcium soap, a minor proportion of wool grease and not more than 20 per cent wt. of at least two extreme pressure additives consisting of at least an oil-soluble lead soap and sulphurized sperm oil in a weight ratio between 1 : 3 and 1 : 1. The oil is preferably a mineral oil though synthetic oils such as diesters, complex esters and blends thereof may also be used.  The calcium soap may be derived from the saponification of excess wool grease or from conventional fatty materials such as tallow or from both.  The term wool grease includes acid-cracked wool grease from which unsaturated materials have been separated. The lead soaps are preferably those of naphthenic acids or C10-22 fatty acids.  Optional ingredients mentioned are liquid chlorinated wax (30-65 per cent wt. chlorine), antioxidants and structure modifiers such as glycerine. In an example, a grease composition is prepared from the following constituents: 5 per cent wool grease; 16 per cent mixed animal stearine and animal fatty acids; 3 per cent hydrated lime; 2 per cent chlorinated paraffin wax (35 per cent chlorine); 4 per cent lead naphthenate (30 per cent lead); 6 per cent sulphurized sperm oil (10 per cent S); and 63 per cent mineral oil (90 SSU/210 DEG  F.). According to the Provisional Specification the use of an oil-soluble lead soap in conjunction with sulphurized sperm oil in the specified ratio results in the formation of lead sulphide in the grease.
Patent GB-1043032-A (GB)
Title: Improvements relating to methods and apparatus for manufacturing granules
IPC: B28C7/00
Filed: 1965-02-19
Abstract: 1,043,032. Automatic size control. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 19, 1965 [March 21, 1964], No. 7178/65. Heading G3R. [Also in Division G4] In granule production, the sizes of sample granules are measured and the numbers falling in different size categories are counted and repeatedly compared with reference counts, the comparisons being utilized to control the size of granules being produced. Cement and water from sources 10 and 11 Fig. 1 (not shown) are supplied to an inclined, rotating, internally finned plate 1 so that granules are formed which are transmitted to a calcining kiln 4. A sample of the granules is by-passed to a measuring device 7 in which each granule obstructs the light to a number of photo-cells corresponding to its size. Four photo-cells are associated with logic circuits and counters so that counts are made of the numbers of granules in each of four size categories. These counts are stored and serve to control, periodically, the rate of supply of cement, water, speed and/or angle of the rotating plate to maintain an optimum size distribution of granules.
Patent GB-115302-A (GB)
Title: Improvements in Mine-Sweeping Appliances applicable for other like purposes.
Inventor: LAWRENCE JOSEPH
IPC: B63G7/04
Filed: 1917-05-19
Abstract: 115,302. Lawrence, J., and Hampson, W. May 19, 1917. Sweeping mines.-Relates to small boats such as a propelled and steered under control of a fixed station, an aircraft, or a parent ship for sweeping submarine objects such as mines. According to the invention, the boat a carries a vertical depending shaft b provided with radial arms c having devices f for gripping the mooring cables g or for striking the firing-devices of the mines h. The vertical shaft b is driven through bevel gear b', d<2> by an electric motor d, which is connected directly to the propeller i of the boat a. The rudder k is worked by an auxiliary motor l. Electricity is supplied by a cable e running along the cable o connecting the boat to a winch on the parent ship. The cables are buoyed up by small floats. The boat a is surrounded with resilient material as a protection against collisions.
Patent GB-787976-A (GB)
Title: Electrolysis process
IPC: C25B3/00
Filed: 1954-03-12
Abstract: 787,976. Electrodialysis. HOOKER ELECTROCHEMICAL CO. March 12, 1954 [April 2, 1953], No. 7329/54. Class 41. A process for electrolytically decomposing the salts of organic aliphatic acids, e.g. sodium acetate or formate, comprises introducing the salt, e.g. as a solution, into a multi-compartment cell 1,. e.g. at 27, which has an anode compartment 2, separated by a cationic permselective diaphragm 5 from an adjacent compartment 3 in which the acid is formed, and at least one permselective diaphragm 25, 29, 30 interposed between the compartment 3 and a cathode compartment 4, the diaphragms 5, 25, 29, 30 being maintained wet with electrolyte and a voltage being impressed across electrodes 7, 9. In the five-compartment cell shown, water is introduced at 16, 17, 32, 19, and carbon dioxide at 32 to react with the sodium cations to produce sodium carbonate or bicarbonate, which is drawn off at 31. Acid is drawn off at 12, and sodium hydroxide at 13, oxygen and hydrogen leaving at 14, 15 respectively. Three-compartment cells are described, in one of which the additional permselective diaphragm is anionic, the sodium acetate solution being introduced into the cathode compartment, and in another of which the additional diaphragm is cationic and the acetate solution is introduced into the central compartment. A four-compartment cell is described in which the arrangement of diaphragms is cationic, anionic, cationic, and the acetate solution is introduced into the compartment adjacent the cathode compartment. Potassium, ammonium, lead and copper salts of numerous specified aliphatic acids may be employed. A current density of 90 amps per square foot is mentioned. In any of the above constructions where two adjacent cationic diaphragms are employed, a substance reactive with one of the products of electrolysis may be introduced into the compartment between the cationic diaphragms. In addition to carbon dioxide, substances mentioned are sulphur dioxide, hydrogen sulphide, hydrogen chloride, phosphoric acid or unspecified organic acids. Specifications 769,103 and 787,977 are referred to.
Patent GB-804954-A (GB)
Title: Hitches for connecting trailer vehicles to tractors
IPC: B60D1/07
Filed: 1956-03-09
Abstract: 804,954. Coupling for vehicles. SALOPIAN ENGINEERS, Ltd., and SMITH, J. L. March 5, 1957 [March 9, 1956], No. 7375/56. Class 103(5) A trailer draw-bar 12 has pivoted to it by a removable pin 10, a member having an eye 14 at one end and a clevis 15 at the other, so that the trailer may be attached to a hook or an eye on the tractor.
Patent GB-410449-A (GB)
Title: Improvements in or relating to view finders for photographic cameras
IPC: G02B23/14
Filed: 1933-09-28
Abstract: 410,449. Photographic view-finders. KILFITT, H., 51, Scheibenstrasse, D³sseldorf, Germany. Sept. 28, 1933, No. 7399/34. Divided on 411,347. [Class 98 (i).] A view finder particularly suitable for cameras of small external dimensions is provided with one inspection opening 1 and two observation openings 2, 3, the opening 2 being used for direct view, Fig. 1, while for viewing at an angle of 90‹, Fig. 2, the opening 3 is used in conjunction with a mirror 4 which is automatically swung through 45‹ by the action of a cam slot 6 when the finder is rotated about the point 5a. For use as a top view finder, Fig. 7, the base plate 7 in which the slot 6 is formed is provided with a hinge 8 permitting the finder to take up a vertical position.
Patent GB-867987-A (GB)
Title: Coil former and method of making the same
IPC: H01F5/02
Filed: 1960-03-03
Abstract: 867,987. Moulding coil formers. STAHL, W. F. March 3, 1960, No. 7495/60. Class 87(2.) [Also in Group IX] A coil former is produced by impregnating a core member with a thermosetting resin, partially curing the core to remove tackiness, mounting a flange in a predetermined position on the core, and substantially simultaneously locking the flange upon the core by deforming it while completing the curing of the resin at least adjacent the flange. Spaced terminal flanges 12, 13 are positioned on a core member 11, comprising wound paper strips impregnated with a resin such as phenol formaldehyde, which has been semi-cured in an oven, Fig. 3 (not shown). Each flange has an offset shoulder 14 providing a perimetric channel 16 into which core material is forced when heated swaging tools 26, 27, engaging the core at 33, are moved inwardly so that the flanges are locked on the core and the resin cured. Inner ridges 20 are formed by using oversize tools or by buckling the core member.