baber/WOPTO huggingface dataset:
Patent GB-734215-A (GB)
Title: Front projection screens
IPC: G03B21/60
Filed: 1953-01-29
Abstract: 734,215. Projection screens. REID, R. N. Dec. 18, 1953 [Jan. 29, 1953], No. 2588/53. Class 97 (1). A screen comprises a transparent sheet having a plane front surface 11 and an undulated surface 10 comprising continuous grooves and covered with a reflecting surface 12. The transparent sheet may be of glass formed with undulations during manufacture or of plastic material shaped by moulding or rolling. The surface 12 may be metallic and may be applied by painting or spraying. Alternatively it may be applied as a separate metal sheet formed with undulations by rolling or stamping. The metal sheet may be applied, preferably during the stamping or rolling, to backing sheet. As a further alternative a metal sheet, thus supported, may have a transparent plastic layer applied to its front face, by spraying or painting, in sufficient quantity to fill the undulations and provide a plane front surface. In all embodiments of the invention the front surface of the screen may be slightly roughened and coated with varnish.
Patent GB-719196-A (GB)
Title: Process for the deoxidation of copper and copper alloys
IPC: C22B15/14
Filed: 1953-01-29
Abstract: In a process of deoxidizing molten copper and copper alloys, a reducing atmosphere containing at least 5 per cent of a mixture of carbon monoxide and hydrogen is maintained above and in direct contact with the molten metal in a furnace, and a neutral gas or vapour such as steam introduced into the molten metal to effect intensive stirring.  Pulverized coal and gas or oil may be burnt above the metal to maintain the reducing atmosphere, which may contain 9-10 per cent. of the gas mixture.
Patent GB-1459061-A (GB)
Title: Electric cable reeling device
IPC: H01R39/64
Filed: 1975-01-22
Abstract: 1459061 An electric cable reeling device A SCHMIDT & CO 22 Jan 1975 [25 Jan 1974] 2721/75 Heading B8M A reeling device for electric cables 6 comprises a rotatable drum 5 upon which the cables 6 are wound and which includes a wall 7, a mounting assemblage including a fixable disc-shaped support member 1 and a stationary shaft 2 which carries a rotatable hub 3 for rotatably mounting the drum 5, the wall 7 being provided with electrically insulated metal rings 8 which are in electrical contact via electric metal balls 10 with electrically insulated metal rings 11 provided on the member 1, electric leads 9 connecting the rings 8 to inner ends of coils 6 and electric leads 12 being connected to rings 11, and a compression spring 13 one end of which bears against a flange 4 of the hub 3 upon which the drum 5 is slidably mounted and the other against an annular extension 14 of the drum 5 to maintain electrical contact between the rings 8, balls 10 and rings 11. The extension 14 is slidable on the hub 3.
Patent GB-944796-A (GB)
Title: Improvements in and relating to electric furnaces
IPC: F27D3/18
Filed: 1962-01-25
Abstract: 944,796. Feeding a plurality of shoots. NORTON CO. Jan. 25, 1962 [April 20, 1961], No. 2799/62. Heading B85. [Also in Division F4] Apparatus for evenly charging an electric smelting furnace with a mixture of ore and reducing agent comprises a pair of counterweighted bucket valves 36, each fed by a vibratory shoot 54 and each supplying two shoots 70 having pivotally mounted deflectors 74. Each valve 36, Fig. 6, is pivotally mounted in a casing 24 having an extension 60 supporting the shoot 54 and is divided into two pockets by a wall 46, the load delivered by each pocket in turn being varied by the counterweight 86, slidably mounted on a rod fixed to the valve trunnion. The shoots 54 are fed by pipes 62 from a hopper 68. The deflectors 74, Fig. 4, are pivotally mounted on the shoots 70 and are adjustable through a pin 80 in ears 78 engaging notches in a bar 82.
Patent GB-799108-A (GB)
Title: Improvements in cathode ray tubes
Inventor: GENTRY CHARLES HAROLD RAYMOND
IPC: H01J29/28
Filed: 1955-02-01
Abstract: 799,108. C.R.T. screens. MULLARD RADIO VALVE CO., Ltd. Sept. 30,1955 [Feb. 1, 1955] No. 2959/55. Class 39(1). The surface of a phosphor screen is coated with an even layer of finely divided silica having a secondary emission coefficient greater than 1À5, e.g., 1À6-1À7 at 16KV, whereby a building-up of negative charge on the phosphor screen is prevented. The silica may be deposited by burning ethyl silicate at a small jet or filament cup inside the tube, and allowing the smoke to settle evenly with the tube inverted. Alternatively the smoke is produced outside the tube, blown into the bulb and allowed to settle.
Patent GB-454207-A (GB)
Title: Improvements in the mounting of instruments on panels
IPC: B60K37/00
Filed: 1935-04-01
Abstract: 454,207. Indicating-apparatus. KOLLSMAN, P., 1, Junius Street, Brooklyn, New York, U.S.A. April 1, 1935, No. 3007/36. Divided out of 445,222 under which a Specification was laid open to inspection under Sect. 91 of the Acts, Oct. 7,1935. [Class 106 (iv)] An instrument is secured to a panel A by a split collar B having means for drawing the ends of the collar together to grip the instrument and means for positively forcing the ends apart to release the instrument. The collar is provided with lugs 11, 12 into which pass securing screws 6, 7. Another lug 17 is provided with inclined parts 19, 20 engaging with corresponding parts on a member 13 into which a screw 8 passes, the collar thus being tightened on to the instrument casing. The member 13 also has a plug 23 which, when the member is moved in the opposite direction, engages inclined parts 27, 28 to force the collar open. Specification 445,222 is referred to.
Patent GB-826423-A (GB)
Title: Improvements relating to the cooling of flame proof motors
Inventor: VOSE JOHN KENNETH
IPC: H02K9/16
Filed: 1957-01-28
Abstract: 826,423. Cooling electric motors. METROPOLITAN-VICKERS ELECTRICAL CO. Ltd. Jan. 15, 1958 [Jan. 28, 1957], No. 3049/57. Class 35. Explosion within the casings of flameproof motors is restricted by not allowing complete axial ventilating passages through the rotor core. Instead, cooling fluid, which is itself cooled in a heat-exchanger, enters and leaves the rotor by ducts at the same end. In one form, Fig. 1, the rotor laminations 3 at each end of the motor are cut out to accommodate a series of radial webs 15 joined by webs 12 connected by a cylindrical baffle 10 to a fan 5. The cooling medium enters and leaves the rotor by ducts 11, 18, and passes round baffle 7, 8 to the inwardly directed fins 6 of the heat-exchanger, which has further, outwardly projecting fins 6<SP>1</SP> yielding the heat to the medium outside the motor casing 1. In a modification, the ducts 18 extend radially into the laminations 3. In further modifications the ducts are provided by axial holes in the laminations joined at their inner ends by radial ducts in some of the laminations. As shown in Fig. 10, these ducts 30, 31 and 32, 33 are each arranged to extend the whole length of the rotor without providing a through passage from one end of the rotor to the other. Ethylene and similar gases may be contained in the coolant.
Patent GB-1004888-A (GB)
Title: Electric motor controlling system
IPC: H02P3/18
Filed: 1964-01-24
Abstract: 1,004,888. Control of A.C. motors. F. SHIBATA. Jan. 24, 1964, No. 3080/64. Heading H2J. An induction motor 1 is braked regeneratively by reversing the supply to its stator, power being returned to the mains 4 by a set comprising series D.C. motor 2 and A.C. generator 3. The secondary circuit of the induction motor comprises variable ratio transformer 6 and semiconductor rectifiers 5 for energizing the motor 2, speed control being effected by adjustment of transformer 6. In a modification, the reversing switches 13, 14, are replaced by saturable reactors. A single motor-generator set may be used with several induction motors, the speed of each induction motor being controlled independently when acting as a generator by a variable ratio transformer in the stator circuit. The variable ratio transformer may be an autotransformer. Adjustable resistors may be inserted in the stator or rotor circuits of the induction motor. The motor-generator set may be replaced by inverters employing mercury arc or semi-conductor devices.
Patent GB-1221541-A (GB)
Title: Improvements relating to apparatus for mixing together liquid and particulate material
Inventor: RICHARDSON JESSIE JANE
IPC: B01F13/10
Filed: 1968-01-19
Abstract: 1,221,541. Feeding animals. J. J. RICHARDSON. 15 Jan., 1969 [19 Jan., 1968], No. 3110/68. Heading A1M. [Also in Divisions B1 and B8] Mixing - Apparatus for mixing a particulate material with a liquid comprises a mixing chamber 6, a hopper 16 for the powder a reservoir 2 for the liquid and a float switch 35, 36 in the mixing chamber to start and stop a motor 9 which operates a liquid metering pump 4, a rotary metering discharge device 19 for the hopper, and a device 31 for shaking or jolting the hopper. The contents of the mixing chamber are agitated by the pump discharge and by a stirrer 38. More than one hopper and/or liquid reservoir may be provided. The reservoir 2 is heated by a thermostatically controlled heater 3 and the mixing chamber is warmed by conduction from the reservoir. Animal feeding - The materials mixed may be milk powder and water preferably at 100F. and a mixing chamber discharge line 40 may be connected to a teat or teats placed above the mixture level to prevent siphonage. A by-pass line from the pump may enable the connecting lines to be washed out with water from the reservoir 2.
Patent GB-452865-A (GB)
Title: Improvements in pneumatic tyre covers
IPC: B60C9/06
Filed: 1935-01-31
Abstract: 452,865. Wheel tyres. DUNLOP RUBBER CO., Ltd., 32, Osnaburgh Street, London, and KING, F. G. W., Fort Dunlop, Birmingham. Jan. 31, 1935, No. 3115. [Class 144 (ii)] A pneumatic tyre cover is composed of superposed layers of bias-cut fabric 1, 2, 3, 4, the warp threads of which cross the tread at a large angle, and interposed side wall reinforcements in the form of a plurality of elements 5, 5a and 6, 6<a>, looped or doubled upon beads 11. The cords of the elements comprising each loop extend obliquely from the bead in opposite directions and at different angles from the cords of the elements of the remaining loops, and the elements are so arranged that the cords of at least one of the elements in each loop cross the warp threads of one of the adjacent layers of fabric in the opposite direction and at an angle which differs from the angle or angles at which the cords of the remaining elements cross the adjacent warp threads of the remaining layers. As shown in Fig. 2, the angle B at which the cords of the elements 5, 5<a> cross the warp threads of the plies 1, 4, is less than the angle C at which the cords of the elements 6, 6<a> cross the warp threads of the plies 2, 3.
Patent GB-644408-A (GB)
Title: Improvements in and relating to electric lamp holders
IPC: G03B15/04
Filed: 1948-02-03
Abstract: 644,408. Lamp-holders. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 3, 1948, No. 3165. Convention date, April 12, 1944. [Class 38 (i)] A holder 10 for a plurality of photo-flash lamps comprises an elongated folded-over strip of resilient metal having a web portion 12 spaced from a parallel split top surface 15. The latter has keyhole slots 17 into the circular portions 18 of which lamps having flat bases may be inserted and slid longitudinally of the holder so that said bases spring under and are retained by the straight-sided parts 19 of the slots. Elongated apertures 16 are formed in the web portion through which the lamp contacts project. The holder may be supported in a multiple flash apparatus so as to be slidable in a bracket, Fig. 3 (not shown), whereby each lamp may be brought in turn into engagement with spring plunger contacts in an energizing circuit. Alternatively it may be used in apparatus such as is described in Specification 590,019, [Group XXI]. In another construction, Fig. 4 (not shown), a number of holders each accommodating one lamp may be mounted on a flexible belt, the ends of which may be joined to form an endless belt and used in apparatus such as that described in Specification 583,565, [Group XXI]. Alternatively the holders may be hinged together to form a belt. Specifications 548,297, [Group XXI], and 609,211 also are referred to.
Patent GB-214951-A (GB)
Title: Process for the manufacture of calcium arsensate
IPC: C01G28/02
Filed: 1924-02-07
Abstract: Calcium arsenate is prepared by oxidizing calcium arsenite by means of chloride of lime.  The chloride of lime may be mixed with a suspension of calcium arsenite or the calcium arsenite suspension may be mixed with lime and chlorine or a gaseous mixture containing chlorine passed through, or arsenious acid may be mixed with excess of lime and water and chlorine passed through.  The calcium arsenate is separated from the calcium chloride solution which is also produced.  The reaction may be effected at any temperature, preferably 60-80 DEG  C.
Patent GB-688613-A (GB)
Title: Improvements relating to the treatment of hydrogen peroxide and other per compounds and of materials to be brought into contact therewith
IPC: C01B15/00
Filed: 1950-11-22
Abstract: Solutions of peracetic acid and other "per" compounds are desensitized by adding from 2 parts per 1000 to 5 per cent of one or more of the organic compounds, with or without normal stabilizers, e.g. an acid, phosphate, stannate, phenacetin, or acetanilide; (a) heterocyclic nitrogen bases with nitrogen in a six-membered ring, particularly those contained in coal tar, pine tar, raw anthracene, anthracene oil, residues obtained in the manufacture of naphthalene, and similar materials, waste acids obtained in the purification of paraffins, pine tar, coal tar and the like, and in tar distillates boiling at 150-400 DEG  C. and being free from anthracene and/or (b) reaction products of any one or more of these which still contain the six-membered heterocyclic nitrogen ring, e.g. a salt formed with an inorganic or organic acid or acids or a complex metal compound formed with a metal salt such as aluminium chloride.  Alternatively, the desensitizing agents may be incorporated in or on containers, pipes, or the like in contact with solutions either by coating, e.g. by dipping, on to the surface of the container &c., or by addition to a paint or lacquer applied to the surface, or by addition to the material from which the container &c. is made, e.g. as stabilizers, fillers, or plasticizers for polyvinylchloride, to give indirect desensitization.  Direct and indirect desensitization may be used in combination.ALSO:Solutions of hydrogen peroxide and/or other per compounds, e.g sodium peroxide, are desensitized by adding from 2 parts per 1,000 to 5 per cent of one or more of the organic compounds, with or without normal stabilizers, e.g. an acid, phosphate, stannate, phenacetin, or acetanilide, (a) heterocyclic nitrogen bases with nitrogen in a six-membered ring, particularly those contained in coal tar, pine tar, raw anthracene, anthracene oil, residues obtained in the manufacture of naphthalene and similar materials, waste acids obtained in the purification of paraffins, pine tar, coal tar, and the like, and in tar distillates boiling at 150-400 DEG C and being free from anthracene and/or (b) reaction products of any one or more of these which still contain the six-membered heterocyclic nitrogen ring, e.g. a salt formed with an inorganic or organic acid or acids, or a complex metal compound formed with a metal salt such as aluminium chloride. Alternatively, the desensitizing agents may be incorporated in or on containers, pipes or the like in contact with the solutions either by coating, e.g. by dipping, on to the surface of the container &c. or by addition to a paint or lacquer applied to the surface, or by addition to the material from which, the container &c. is made, e.g. as stablizers, fillers, or plasticizers for polyvinylchloride, to give indirect desensitization.  Direct and indirect desensitization may be used in combination.
Patent GB-346884-A (GB)
Title: Improvement in draft and buffing apparatus for railway and similar vehicles
IPC: B61G9/10
Filed: 1930-01-31
Abstract: 346,884. Railway vehicles. MINER, Inc., W. H., 209, South La Salle Street, Chicago, U.S.A. Jan. 31, 1930, No. 3333. Convention date, April 15, 1929. [Class 103 (v).] Combined buffer and draw gear.-In draught or buffing apparatus in which frictional resistance to shocks is exerted in addition to the resistance provided by springs the friction is provided between movable shoes and a shell having a plurality of rigid interior surfaces each comprising two flat faces extending lengthwise and connected by a curved face the radius of which is greater at its outer than at its inner end. The helical springs B are adapted to resist draught forces exerted through the yoke 14 and also buffing forces transmitted from the yoke 14 to the sliding crossbar 15. Both the crossbar 15 and the shell A are adapted to slide longitudinally in guides 10 forming part of or secured to the vehicle frame, but are normally held up against end brackets 11, 12 by the springs. The springs abut at one end against the end 19 of the shell 18 and at the other end bear against several V-shaped shoes C, D which are forced outwards into engagement with the polygonal surfaces in the interior. The shoes and the shell are slightly tapered longitudinally and the radii of the corners 23 are such that the shoes can only engage on their flat faces throughout the whole of their movement. The shoes are forced outwardly by a central wedge E connected to the other end of the shell A by a bolt G which limits its movement. The angles of the wedge are such that the shoes are only forced into engagement with the shell when the springs are compressed, the return movement being free.
Patent GB-834732-A (GB)
Title: Photographic contact-printing apparatus
IPC: G03B27/24
Filed: 1958-01-31
Abstract: 834,732. Photographic contact printing apparatus. CHEMISCHE FABRIEK L. VAN DER GRINTEN N.V. Jan. 31, 1958 [Feb. 6, 1957], No. 3339/58. Class 98(2) In a contact printing apparatus, a friction element acts on superposed original and copy sheets, while they are being conveyed from an exposure position to a movable separating element, to advance the sheet which is about to be engaged with the separating element relatively to the other sheet. As shown in Fig. 1, the original A and copy material B are carried in superposition by an endless belt 3 about a transparent rotating cylinder 1 having a light source 2. The sheets are guided by lifting brush 5 on to belt 6 where the copy material B is advanced relatively to the original A by frictional engagement with rotating disc roller 9 and its leading edge is guided around disc roller 10 by separator 11 so that the latter scrapes up the leading edge of original A from the guided surface of B. In another form (Fig. 4) the sheets are retained on the underside of belt 3 by air pressure or static electrical charges: If the original A is in advance of B it may be held by suction in the region of roller 16 until Breaches the roller 16 and the suction thus no longer acts directly on A so that it falls on to counter rotating friction roller 9 and is retarded. Meanwhile B is advanced between roller 16 and separator 11. A is only advanced again when its adhesion with belt 3 is greater than the force of retardation exerted by roller 9. Alternatively, the sheets may be blown against roller 9. In another form (Fig. 5) the superposed sheets are held under tension against a braked friction disc roller 9 by the greater speed of belt 22 relative to that of belt 3. The sheets are retained on belts 3 and 22 by a difference in air pressure. Developer is applied to copy material B by rollers 17, 18 and .19 from troughs 20, 21. Rollers 9 may consist of thin spaced discs of rubber or "Mipolan" (Registered Trade Mark) or may be coated with rubber. Alternatively, the relative movement of the sheets may be effected by reciprocating rubber fingers. The separator 11 may be in the form of small plates separately pivoted on a shaft (Fig. 6, not shown) or in the form of a bar. More than one print may be made at a time by feeding several exposure sets through the apparatus side by side.
Patent GB-534433-A (GB)
Title: Improvements in machines for the manufacture of wire rope or cable
IPC: D07B3/06
Filed: 1940-02-22
Abstract: 534,433. Machines for making wire rope. DEICHSEL, A. MAGYAR ACELDROT-, DROTKOTEU,-ES-DROTARUGYAR R. T., and BALOG, K. Feb. 22, 1940, No. 3378. [Class 109] In a device for twisting strands into wire rope &c. in which the strands are drawn off bobbins revolving with planetary motion around a common shaft, each bobbin is rotatable about its own axis at a controllable speed, so that the back or reverse twist on. the strands can be varied as required. The bobbins 3 are carried within cylindrical cases 5 by a shell 4 which rotates independently of the central core-carrying shaft 1. The bobbins are supported on the inner side by spring-pressed rollers 8 housed in radial guide slots 10 of a spider 7, rotating with the shaft 1. The cases 5 are toothed at 12 to mesh with teeth 13 on the shell 4. Rings 14 prevent axial displacement of the cases.
Patent GB-1149311-A (GB)
Title: Periodic slow wave structure
IPC: H01J23/24
Filed: 1967-01-23
Abstract: 1,149,311. Velocity-modulated tubes. SOC. THOMSON-VARIAN. 23 Jan., 1967 [26 Jan., 1966], No. 3388/67. Heading H1D. In a slow wave structure for use in a travelling wave tube, a backward wave oscillator, or a linear accelerator, and constituted by a discloaded waveguide, the discs 11 are centrally apertured for the beam and have an even plurality of aligned radial coupling slots 121, each section defined by a pair of adjacent discs housing conductive posts 13 extending between the discs and parallel to the axis in alternate sectors defined by the radial slots, the sectors in which the posts are disposed alternating from one section to the next. The use of posts of convex or concave biconical shape, or in the form of a simple cylinder, or a cylinder having a collar, is disclosed, and the effect on the #-# curves-which are close to those of a clover-leaf structure-is discussed, (Fig. 5, not shown). The end four sections of the structure may be provided with posts of altered and progressively changing shape, for impedance matching and the avoidance of band-edge oscillations (Fig. 6, not shown). Dimensions are given.
Patent GB-481326-A (GB)
Title: A new or improved apparatus for playing a game
IPC: A63F7/06
Filed: 1937-02-05
Abstract: 481,326. Table games. BROOKES & ADAMS, Ltd., JACKSON, W. T., and BROOKES, A. E. Feb. 5, 1937, No. 3422. [Class 132 (ii)] A game apparatus comprises a table or board upon or near which is mounted a movable member extending above the table and substantially parallel to its surface, a roller capable both of movement longitudinally of the movable member and of rolling on the table, and means for arresting the roller at various positions on the table. As shown, a spring arm 11 carrying a rubber ball 15 is pivoted at the centre of a circular table provided with holes 7 and with an upstanding projection 10. The end of the spring arm is provided with a handle 14 shaped like a golf club head. In playing a game, the ball is adjusted along the spring arm, and the arm is flexed against the projection 10. On releasing the arm, the ball rolls along the table and if skilfully directed enters one of the holes. Markings 16 indicate appropriate setting for the ball. The table may be of dished formation. In a modification, the table is rectangular and the arm 11 is replaced by a ball-carrying bar mounted on carriages movable along the sides of the table. The arm may be drawn back against the pressure of springs and when released is projected up the table.