baber/WOPTO huggingface dataset:
Patent GB-757554-A (GB)
Title: New and improved ammonium nitrate compositions and production thereof
Inventor: DAVIDSON SAMUEL HENRY
IPC: C06B31/38
Filed: 1954-04-26
Abstract: 757,554. Ammonium nitrate explosives. 'IMPERIAL CHEMICAL INDUSTRIES Ltd. Dec. 31. 1954 [April 26, 1954], No 11943/54. Class 9(2) In explosive compositions, free from liquid nitric esters, comprising a major proportion of ammonium nitrate and a minor proportion of a normally solid fusible self-explosive sensitizer, e.g. trinitrotoluol, tetryl, or a mixture of trinitrobenzene and trinitrotoluol, the ammonium nitrate is'of particle size such that substantially all of it passes 120 B.S.S. mesh (124Á), at least 85 per cent passes 170 B.S.S. mesh (89Á), and at least 65 per cent passes 240 B.S.S. mesh (66Á), and the particles have a solidified coating of the sensitizer. The composition may be prepared by mixing up to 95 per cent ammonium nitrate, which may have been treated with an anti-setting agent, and the sensitizer at above the melting point of the sensitzer, e.g. 85‹C. for trinitrotoluol, and cooling the mixture preferably with stirring to room temperature. The composition may include at least one flame-suppressing agent, e.g. sodium chloride, sodium sulphate, calcium sulphate, or china clay, and carbonaceous material, e.g. woodmeal or bagasse. Specifications 625,077, 627,680, 665,478,. 698,891 and 743,602 [all in Group III] are referred to
Patent GB-138242-A (GB)
Title: Improved riddle or sieve
IPC: A47J43/22
Filed: 1919-05-13
Abstract: 138,242. Tennant, W. S. May 13, 1919. Drawings to Specification. Hand sieves.-A hand riddle is made with curled wires of No. 10 gauge through which straight wires of No. 12 gauge are inserted, both sets of wires being securely fixed to the wooden frame of the riddle.
Patent GB-474298-A (GB)
Title: Improvements in or relating to electric discharge lamps comprising luminescent materials
IPC: H01J61/42
Filed: 1936-04-28
Abstract: 474,298. Glass manufacture. GENERAL ELECTRIC CO., Ltd., BREADNER, R. L., RANDALL, J. T., and RYDE, J. W. April 28, 1936, Nos. 12067 and 20444. [Class 56] [Also in Groups XL and XX] A discharge lamp having within its envelope luminescent material ex. cited by the discharge is provided with an unclosed sheath transparent to ultra-violet light inter. vening between the dis. charge and the luminescent material. The sheath may be of a lime-alkali glass rich in potassium, of the type described in Specification 416,062, con. taining, for example, SiO2 65 per cent, K2O 16 per cent, CaO 5 per cent, B2O3 2 per cent, BaO 2 per cent, Na2O 5 per cent, Al2O3 3 per cent. The Figure shows an apparatus for blowing thin glass sheaths, for example 0À025 mm. thick, on the inside of an envelope coated with luminescent material. The coated tube T is supported on a stand below a narrow glass tube t which is supplied with air at a controlled pressure through valve 13. An iron rod 7 is clamped to the end of tube t and carries at its lower end a piston 8 working in an oil-filled cylinder 9. The tube t is heated to softening point below the clamp 5 and is drawn down by the weight 8 at a rate controlled by a valve e at 11, and at the same time blown out by air pressure against the inside of tube T. In a modification, the tube is of iron and the rod 7 carries at its upper end a crucible containing molten glass, the method of blowing and drawing being the same.
Patent GB-952104-A (GB)
Title: Arrangement for induction heating
IPC: H05B6/02
Filed: 1961-04-04
Abstract: 952,104. Heating travelling wire by induction. TELEFONAKTIEBOLAGET L. M. ERICSSON. April 4, 1961 [April 4, 1960], No. 12070/61. Heading H5H. A travelling wire or band 3, 4, 5 to be softannealed, is passed around a drum 6 mounted on rollers 7 and enclosing the core 1 of a transformer having a primary winding 2. The drum 6 includes a number of metal bars 8 preferably of copper or copper alloy which are insulated from each other, and the drum is so made of metal or insulating material that it does not form a closed circuit around the core 1. One or more turns of the wire 4 on the drum are connected together by the bars 8 to form a closed loop which is heated inductively. As shown, the wire describes a single turn which is connected by the bars 8 occupying an angle a, preferably 70 degrees, over which parts of the wire lie side-by-side. The connection zone may be immersed in the cooling water to suppress arcing. In an alternative arrangement (Fig. 3, not shown), the bars 8 are replaced by a set of external metal friction rollers which are urged by spring action against the turns of the wire 4 over the arc corresponding to the angle a.
Patent GB-252160-A (GB)
Title: Process for the production by electro-thermic means of aluminium silicon alloys practically free from carbide
IPC: C22C21/02
Filed: 1926-05-10
Abstract: 252,160. Metallbank und Metallurgische Ges., Akt.-Ges. May 12. 1925, [Convention date]. Alloys.-Carbide-free aluminium-silicon alloys containing 35-47 per cent of silicon are made in an electric furnace. Such alloys may be alloyed with more aluminium to form aluminium-silicon alloys containing ordinary proportions of silicon, small amounts of other metals such as copper being present if required, such other metals being added either in the formation of the final alloy or in the production of the rich silicon alloy.
Patent GB-291785-A (GB)
Title: Improvements in or relating to thermionic cathodes of high emissivity
IPC: H01J9/04
Filed: 1928-04-25
Abstract: 291,785. Siemens & Halske Akt.-Ges. June 10. 1927, [Convention date]. Addition to 289,381. Vacuum tubes. - In a process for making a thermionic cathode gas-filled discharge device, according to the parent Specification, in which the surface of the cathode consists of an alloy of the core metal with a high percentage of electron-emitting metal, such as thorium, the coating consists of a compound containing oxygen, for example, thorium nitrate, with a flux, such as a compound of phosphorus or boron, preferably borax.
Patent GB-1531537-A (GB)
Title: Degassing treatment of liquid
Inventor: MARTEN DAVID ERIC
IPC: B01D19/00
Filed: 1976-03-26
Abstract: 1531537 Degassing liquid BRITISH PETROLEUM CO Ltd 2 March 1977 [26 March 1976] 12227/76 Heading B1M A method for removing undesirable gas from a liquid in which it is dissolved comprises contacting the liquid co-currently with an inert gas in a static mixer to displace the undesirable gas by the inert gas, passing the resulting mixture of liquid containing dissolved inert gas, free inert gas and undesirable gas to a cyclone separator, and recovering liquid of higher quality. Thus oxygen can be removed from sea water using nitrogen, the sea water then being injected into oil reservoirs.
Patent GB-527949-A (GB)
Title: Improvements in and relating to electric transformers
IPC: H01F27/34
Filed: 1939-04-24
Abstract: 527,949. Transformers. BRITISH THOMSONHOUSTON CO., Ltd. April 24, 1939, No. 12278. Convention date, April 26, 1938. [Class 38 (ii)] In order to obtain satisfactory distribution of voltage surges in the high tension winding of a transformer by modifying the capacity coupling between sections of the winding, the turns of successive pancake coils are arranged in the order indicated so that a high degree of coupling is obtained on both the inside and outside of the winding in the case of coils nearer to the high tension line a, a high degree of coupling is obtained on one side only in the case of the coils toward the middle of the winding, and a minimum of coupling is obtained in the case of coils at the lower end of the winding.
Patent GB-198875-A (GB)
Title: Improvements in underframes for railway and like vehicles
IPC: B61G9/22
Filed: 1922-05-02
Abstract: 198,875. Pflager, H. M. May 2, 1922. Underframing of bodies.-In a combined platform and bolster of the type in which the frame casting has integral side sills, centre sills, and end sill, and buffer seats spaced from the longitudinal centre of the casting with draft sills extending from the end sill to the intermediate sill, transverse openings are provided in the draft sills to receive and support transversely-extending buffing springs. The buffing spring 10 is placed in position through openings 15 and 17 in side sill 3 and diagonal strut 8, respectively, and may be supported by the lower edge of the openings 18 provided in the draft sills 16.
Patent GB-1125324-A (GB)
Title: Process for the manufacture of n-vinyl compounds
IPC: C07C233/00
Filed: 1966-03-21
Abstract: 1,125,324. N-Vinyl amides. FARBWERKE HOECHST A.G. 21 March, 1966 [20 March, 1965], No. 12381/66. Addition to 1,079,314. Heading C2C. N-Vinyl compounds of the formula wherein R 1  and R 2  are alkyl groups or R 1  and R 2  are linked so as to form a ring which may be substituted by alkyl groups, and R 3  and R 4  each represents hydrogen or an alkyl group, are obtained by splitting a compound of the formula wherein R 5  is alkyl, by heating in the gaseous phase in the presence of a catalyst comprising a weakly acidic oxide of aluminium, beryllium, zirconium or tungsten, a weakly acidic phosphate of calcium, aluminium, molybdenum, boron or tungsten or aluminosilicate in the H- form. The reaction may be effected at 50- 200 C., preferably under reduced pressure, and the catalyst may be supported on an inert carrier. The starting material may be evaporated and passed through a reaction tube in an inert carrier gas, e.g. N 2 . In the examples, N-vinyl pyrrolidone and N-vinyl-N-methyl acetamide are prepared, using as catalysts aluminium phosphate and acid aluminium oxide respectively.
Patent GB-216675-A (GB)
Title: Apparatus for filtering dust laden gases
IPC: B01D46/32
Filed: 1923-05-09
Abstract: 216,675. Thomson, T., and Nisbet, N. May 9, 1923. Filtering.-Gases are filtered by granular or coarsely powdered material descending at a controlled rate between vertical openwork supports, two or more adjacent passages being formed by the supports, through which the gases pass in succession. The filter extends vertically across a chamber A with a gas inlet and outlet, and comprising louvre, slat, or other pervious supports B, B', forming passages for the descent of granular or powdered filtering medium such as. quartz or flint chippings or metallic fragments. The material is fed from a hopper E by a worm F to a gas-tight extension C of the passages between the supports, and is removed through an extension D by a worm G and delivered to a screen J rotated or vibrated to remove the dust,. the cleansed material being returned by an elevator M to the feed hopper. The floor of the chamber A slopes, to return any escaped material to the casing D. The outlet D is divided bv a partition D', hinged or pivoted to regulate the relative areas of the two outlet passages. The pitch of the screw G is variable so that the rate of discharge of the filtering material is kept uniform along the width of the passage. The interior slats B' may be combined' together forming W-shaped members. In a modification, the materials in the two passages may be different, and may be provided with separate inlet and outlet and separate means forregulating the rate of movement.
Patent GB-732407-A (GB)
Title: Improvements in or relating to electrical connector sockets
IPC: H01R13/33
Filed: 1953-05-05
Abstract: 732,407. Two-part couplings. ELCON MANUFACTURING CO. May 5, 1953 [May 17, 1952], No. 12447/53. Class 38 (1). A resilient contact comprises a number of individual, circularly-arranged wires 12 extending helically from a base 11 having an aperture in which they are secured by a plug 23 and solder. Surrounding the wires in positioning notches are a number of constricting coil springs 14, and a short plug 13 is arranged inside the socket in abutment with plug 23 to limit the inward movement of the wires. To prevent over-expansion of the wires, their outer ends 25 are bent over outwardly so as to overlap adjacent wires with which they interlock when the socket has reached a predetermined expansion. Fig. 6 shows a double-ended socket contact constructed as above except that both ends 25a of the wires are turned outwardly and the centre of the socket is secured round a plug 23a in a base 11a, plugs 13a abutting the plug 23a.
Patent GB-1260992-A (GB)
Title: Improvements in or relating to extruders
IPC: B29C48/395
Filed: 1970-03-16
Abstract: 1,260,992. Screw mixers. HERMANN BERSTORFF MASCHINENBAU G.m.b.H. 16 March, 1970 [1 April, 1969], No. 12456/70. Heading B1C. [Also in Divisions B4 and B5] An extruder for rubber and plastics material providing improved heat transfer, e.g. 450k cal /sq. m./h./deg. C., comprises a cylindrical barrel 3 having, a cylindrical liner 2 which defines a helical passage 2a for forced circulation of cooling or heating fluid, and having therein a three start screw 1, the radial spacing s between the inner surface of the liner 2 and the crests of the threads 1a being equal at most to 0.2% of the barrel diameter D, and the radial distance a between the liner inner surface and the inner wall of the passage 2a being at most 15% of the barrel diameter D. It is stated that the three starts increase the heat transfer by providing increased disturbance of the film of material on the liner inner surface.
Patent GB-1035951-A (GB)
Title: Digital data storage system
IPC: H03M7/12
Filed: 1963-03-29
Abstract: 1,035,951. Data store addressing. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 29, 1963 [April 2, 1962], No. 12475/63. Heading G4C. An addressing arrangement in a digital data store comprises means for converting a multiorder input number of radix p to a multi-order output number of radix q q (p > q), and means to store at least the lower orders of the multiorder output number in the address register. Fig. 1 shows diagrammatically the arrangement for converting multi-digit numbers of radix 11 (hendecadal) to multi-digit numbers of radix 10. Four-bit bytes derived from the information to be stored are gated by a counter 21 to the load register 26 of a shift register, stored in stages 26, 22, 23, 24 . . . M (M represents a number of additional stages) and shifted one stage at a time. At each step the contents of stage 22 are added to the contents of stage 26, and once each complete cycle the amount in stage 26 is replaced by the next byte gated in by counter 21. Thus, when all the bytes have been entered, stages 22, 23, 24 ... M contain the least significant digits in ascending order of a decadal number corresponding to the entered number interpreted as hendecadal. The apparatus is arranged for either binary-coded decimal or pure binary operation. For the latter a trigger 74, Fig. 2 (not shown), is set to open gates 36- 39 and binary bits are fed directly from stage 26 to the adder 27 where they are combined with the binary digits in stage 22 and fed out on lines 54, 61, 62 and 63 to be returned to stage 26. A circuit 67 detects any carry from the highest stage 79 of the adder and sets a trigger 72 so that one is added to the first stage 76 during the next cycle. In the decimal mode of operation a circuit 44 detects whether the binary number in stage 26 is greater than ten, and if so eleven is deducted by adding the complement five in an adding circuit 53, and ignoring the overflow, and the trigger 72 is set to add one to the first stage 76 of the adder 27 during the next cycle. A detect circuit 67 and an adding circuit 68 similarly convert the output to decimal.
Patent GB-552394-A (GB)
Title: Electric wave guide system
IPC: H01P1/213
Filed: 1941-09-26
Abstract: 552,394. Automatic frequency control systems. STANDARD TELEPHONES & CABLES, Ltd. Sept. 26, 1941, No. 12492. Convention date, Oct. 4, 1940. [Class 38 (iv)] [Also in Groups XL and XXXV]] In a multiplex wave guide system the frequency of a generator 97, Fig. 31, is automatically controlled by connecting tubular sections to the wave guide 98 tuned respectively above and below the generator frequency. Rectifiers 99<SP>1</SP>, 99<SP>11</SP> within the tubular sections are connected to amplifiers A1, A2 which control a motor M for correcting any error in frequency.
Patent GB-560671-A (GB)
Title: Improvements in or relating to electric signalling systems
IPC: H04L25/22
Filed: 1942-09-04
Abstract: 560,671. Electric signalling systems. HADFIELD, B. M. Sept. 4, 1942, No. 12504. [Class 40 (i)] [Also in Groups XXXIX and XL] Single current signals (including signals produced by changing the amplitude of a normally flowing a.c. or by sending trains of a.c. or pulsating currents) are caused to produce a double-current effect by deriving from them a bias, which persists throughout the duration of a train of signals, acts in opposition to the higher value of signalling current and has a value between the effects produced by the marking and spacing conditions without such bias. The effect may be such that marking and spacing conditions produce opposite and equal or unequal effects on a receiving device. The circuits are such that they will respond to a.c. signals whether they are rectified or not. The invention may be applied to (a) Selective signalling in accordance with the relative amplitudes of marking and spacing currents. The potentiometer R is set to such a value that equal effects in opposite directions are applied to the valve for the marking and spacing conditions of a particular signal. Such a circuit will not respond properly to a signal in which the relative amplitudes are different. Consequently a selective system can be arranged in which each circuit responds only to a particular percentage change of amplitude. (b) Signalling over power circuits. A slight change in the power voltage can be made to constitute the signal, the potentiometer R being appropriately adjusted.
Patent GB-882829-A (GB)
Title: Tool for cutting bevelgears, hypoid gears and similar gears
IPC: B23F21/22
Filed: 1958-04-21
Abstract: 882,829. Milling-cutters. PICANOL, J. April 21, 1958 [March 8, 1958], No. 12504/58. Class 83 (3). A bevel or hypoid gear-cutting tool has teeth 3 whose profiles are shaped as logarithmic spirals. The teeth are secured to the body 1 by screws 2. The spirals have a pole C on the axis of the cutter. The pressure angles of both faces are constant. The teeth may be sharpened on a face plane passing through the pole or on a face plane at right angles to the cutter axis. Specification 882,827 is referred to.
Patent GB-436101-A (GB)
Title: Improvements in and relating to fluid impelling means
IPC: F24H3/04
Filed: 1934-04-25
Abstract: 436,101. Centrifugal and screw fans. MERCER, A. A., 123A, Walmer Road, North Kensington, London. April 25, 1934, No. 12517. [Class 110 (i)] A screw fan, or centrifugal impeller, has hollow duplex blades containing electrical resistances for the purpose of heating the fluid being impelled. A fan, Fig. 2, has blades which are recessed 8 for stiffening purposes. Resistance wires 5, sandwiched b e t w e e n sheets of mica 6, have leads passing through the hub 2, and through, or outside, the driving shaft 11 to slip-rings 17. The blades are bolted to lugs on the hub, and the latter secured by bolts 13 to a flange 10 on the shaft 11, spacers 14 serving to insulate the flanges 9, 10, to prevent heat transfer. The blades are earthed by their connection with the armature shaft 11. The leading blade of a pair is of slightly less pitch than the second blade. Figs. 3 and 4 show a centrifugal impeller comprising pairs of blades 24, 25, with a space between each pair tapering outwards. The hollow blades are connected to the driving disc 23, only at their roots to allow free flexing of the blades under heating and centrifugal stresses. Fig. 5 shows a centrifugal impeller which may be suspended in a tank, the motor casing 29 being provided with feet 30 to rest on the upper edge of the tank. A hollow shaft 32 is bolted to the armature shaft 33 with an air space between the flanges 34, 35. A removable cover 38 permits access to the heating resistances and leads in the hollow blades 37. Lugs 42 secure the top wall 41 to the hub 31. The wall 41 and hub 31 form an annular inlet for the fluid being impelled. One or more fans may be used in a closed cycle air heating system which may include radiators. The blades may be corrugated or curved to give stiffness, or may be of aerofoil section. The blades may be designed so that heating strains oppose those due to centrifugal force, e.g. the blades may comprise bi-metallic elements.
Patent GB-514122-A (GB)
Title: Improvements in or relating to detachable soles and heels
IPC: A43C13/02
Filed: 1938-04-27
Abstract: 514,122. Boot &c. protectors. DIGNAN, E. M. April 27, 1938, No. 12607. [Class 17 (iii)] A frame e of metal, synthetic resin, leather or other material with notches f therein opening outwards a its edges is secured to a sole or heel, and studs or pads a, b, b with headed members d to engage the rebated under sides of the frame e adjacent the notches f are moved inwards and are retained in position by a central pad or plate m screwed or otherwise attached to the sole or heel. The studs or pads have an upstanding flange j at their outer edges to enclose the edge of the frame e. Specification 399,472 is referred to.
Patent GB-918992-A (GB)
Title: Improvements relating to apparatus for calculation of depth, trim, bending moment and shearing stress in a loaded ship
IPC: G06G7/68
Filed: 1960-04-08
Abstract: 918,992. Electric analogue computers for the loading of ships. SINTEF. April 8, 1960 [April 28, 1959], No. 12622/60. Class 37. Depth, trim, bending moment and shearing stress are calculated for a loaded ship by assuming the ship divided into a number of sections and associating each with an apparatus section of an electric analogue computer which comprises resistors, potentiometers and adjusting means set according to depth, trim and load. In one section P11 is a variable resistor giving section load and R11 and R41 fixed resistors such that the sum of the currents through them when voltages e s  and - e s  are applied respectively and P11 is maximum (no load) equals the weight of the section- R51 represents the buoyancy factor of the ship's section and R61 the product of the buoyancy factor. and the distance of the section from midship. The current i o1  is proportional to the resultant weight of the ship's section. Similar references apply in the other sections. The voltage e D  is adjusted so that the sum of currents i o1 , i o2 , &c. will be 0, e 0  on the potentiometer being a measure of D, the depth of the ship. e 01  is the voltage across a fixed resistor R 01 and itis applied over a fixed resistor RM 1 , where 1/RM is proportional to the distance from the plane about which one wants to determine the bending moment. The sum of all the currents iM 1 , iM 2 , &c. equals the total moment. The voltage e T  is adjusted by potentiometer so that the sum of the currents iM 1 , &c., is zero by reference to one end of the ship, the value of e T  then giving the trim angle. The bending moment and shearing stress at any plane are obtained by summing the currents iM n  and i on  respectively. Three of the eight sets of resistors for an eight-section ship are shown in Fig. 5 and more than one load, e.g. tanks, in any one section are indicated by several adjustable resistors, e.g. P 12 , P 22 , P 32 . Three areas are shown, B, C, D, E, the weight unit, C, D,F,G, the moment unit, and H, B, O, K, the control unit. Switch S in the weight unit has one position for determining depth, and other positions for determining shearing stress. The switch M in the moment unit is adjusted to the measurement of trim and by bringing in resistors R A5 , R A6 , R A7 , R A8  or R B6 , R B7  and R B8 , allows the bending moments between sections to be read on an instrument A 2 , or on a potentiometer P M  with A 2  showing a null reading. The control unit consists of a voltage divider R 0 -R 0  and four potentiometers P D , P T , P S  and P M , the positions of which give depth, trim, shearing stress and bending moment, respectively. Resistors P11 and R11 may be replaced by a potentiometer giving greater accuracy (Fig. 6, not shown).