baber/WOPTO huggingface dataset:
Patent GB-769483-A (GB)
Title: Zinc aluminium alloy and process for the production thereof
IPC: C22C18/04
Filed: 1953-06-30
Abstract: A zinc-aluminium alloy, particularly suitable for workpieces having high strength to weight and for carrying out reciprocating movements or exposed to sliding or roling friction, has a composition within the following range .Zn.at least 20.per cent .Al.at least 20.per cent .Si.0.1 - 15.per cent .Cu.0.05 - 6.per cent The alloy may also contain one or more of the following elements up to 6 per cent in total namely Cr, Ti, Ca, Sr, Ba, Cd, Mn, Sn, B, C, V, Mo, Sb, W, Ce, P, Na and K with Fe or Pb as impurities only less than 0.1 in either case.  The alloy may contain in addition Mg up to 6 per cent and Ni up to 4 per cent. In forming the alloy one or more of the elements may be added in the form of hydrides.  The addition of monoazite to the melt ensures the production of a uniformly fine-pored material suitable for bearings.  The resulting alloy may be cast by continuous casting, pressure or die casting from a melt at a temperature of 550-680 DEG C.  Preferably the melt is cooled in stages first locally then as to the rest, as by use of a steel mandrel as a casting core which may be cooled by water or simply serve as a heat dissipator. The casting may be heat treated.  For example it may be subjected to prolonged heating to 350-400 DEG C. for 6-12 hours and tempered and then quenched in cold sand impregnated with oil.  Alternatively the incompletely cooled casting may be heated to 300-400 DEG C. on removing from the mould and placed successively in sand baths at various temperatures, e.g. 200 DEG C., 100 DEG C. and 10-20 DEG C., for several hours in each.  Chill mould castings may be tempered at 250-300 DEG C. then cooled to 10-20 DEG C. in sand.  Specifications 769,484 and 769,485 are referred to.
Patent GB-1255043-A (GB)
Title: Solid-state constant power ballast for electric discharge device
IPC: H02M3/156
Filed: 1969-04-09
Abstract: 1,255,043. Supply systems for discharge lamps. WESTINGHOUSE ELECTRIC CORP. 9 April, 1969 [29 April, 1968], No. 18136/69. Heading H2H. [Also in Division G3] The current through a discharge lamp 10 is maintained at a desired average value by alternately supplying the lamp from a D.C. source 11 until the current reaches a predetermined value and then using the energy stored in an inductor 14 to pass current through the lamp (via a diode 18) for a predetermined fixed time, these alternate cycles producing a triangular shaped current waveform giving the desired average current, Fig. 2 (not shown). The lamp current is detected by a resistor R1 whose output signal is used to control a Schmitt trigger circuit formed by transistors Q2, Q3 and determining the ON/OFF times of a switching transistor Q1  controlling the supply to members 10, 14. During warm-up of the lamp, these ON/OFF times are controlled by a current peak detecting circuit R2, R4, D2, C1 which causes the control circuit to operate in a variable pulse-frequency mode. When steady-state lamp operation has been reached the voltage developed across a capacitor C2 is increased to exceed that across capacitor C1 and cause control to pass to an average-current-detecting circuit R10, R11, D6, C2, which thereafter operates the transistor Q1  at a fixed mark/space ratio corresponding to the desired average current. This current is automatically varied, to maintain constant power with supply voltage variations, by a network R12, R13, C3, D5 which controls the Schmitt trigger circuit to vary the mark/space ratio of transistor Q1 in accordance with supply voltage variations as sensed by the capacitor C3. The described control circuit also automatically compensates for variation of the lamp voltage with ageing to maintain constant lamp power, the theoretical basis of this aspect of the invention being discussed. Operation of the circuit on an A.C. supply is envisaged together with various modifications such as replacing resistor R1 by an impedance or a current transformer and obtaining the predetermined OFF time of transistor Q1 by time delay means other than the circuit C2, R11.
Patent GB-691692-A (GB)
Title: Improvements in dental polishing strips
IPC: A61C15/00
Filed: 1950-07-20
Abstract: 691,692. Dental polishing strips. MARDER, M. July 20, 1950 [June 13, 1950], No. 18200/50. Class 81 (ii). A strip for polishing tooth fillings has rigid gripping members 2, 3 fixed to the ends. The gripping members 2, 3 may be stuck or pressed into position and may be provided with gripping surfaces produced by milling or other means described in the Specification.
Patent GB-1467254-A (GB)
Title: Sheet assemblies
IPC: F16B5/06
Filed: 1973-04-16
Abstract: 1467254 Joining metal sheets P J K PROJECTS Ltd 11 April 1974 [16 April 1973 25 July 1973] 18223/73 and 35344/73 Heading F2M Substantially rectangular rigid sheets are adapted to be interconnected to form panels for buildings, caravans, vans or road signs by having apertures or securing means 11 in two rearwardly extending longitudinal flanges 2. The apertures or securing means being formed in the surface of a fold formed in the flange. In a modification both folds are formed with identical apertures and a separate strip has tabs, which may be formed in situ, passing through aligned apertures. Various modifications in the jointing strip and apertures are also included. The sheets are preferably aluminium or steel or their alloys
Patent GB-1390636-A (GB)
Title: Process for degassing and pouring molten metal
IPC: B22D11/113
Filed: 1972-04-19
Abstract: 1390636 Continuous casting I PROPERZI 19 April 1972 [3 June 1971] 18234/72 Heading B3F [Also in Divisions C7 and F4] Molten metal is conducted from a furnace 1 to an intermediate vessel 4 while being degassed, the molten metal being drawn through an inverted U pipe 3 by vacuum created by a pump 9, the rate of flow being controlled by varying the vacuum while maintaining a vacuum space at the highest point of the pipe. The vessel 4 is connected by a channel 6 to a vessel 7 which supplies metal to a continuous casting machine, e.g. of the wheel-and-belt type. Where, as shown, the pipe 3 extends outside the furnace it is heated to prevent solidification. In a modification (Fig. 2, not shown), the pipe 3 and intermediate vessel 4 are contained within the furnace structure. Also the intermediate vessel may be omitted and metal delivered directly to the vessel 7.
Patent GB-1426540-A (GB)
Title: Seat
IPC: A47C7/16
Filed: 1974-04-25
Abstract: 1426540 Seats J G HOGKVIST and BOO REMMARE 25 April 1974 [30 April 1973] 18246/74 Heading A4J A seat plate for counteracting displacement in a forward direction of the pelvis of an occupant is of the form shown. A downwardly depending flange may extend along the periphery of the plate.
Patent GB-1399283-A (GB)
Title: Pharmaceutical compositions
IPC: A61K31/505
Filed: 1972-04-20
Abstract: 1399283 Histamine receptor inhibitors SMITH KLINE & FRENCH LABORATORIES Ltd 19 April 1973 [20 April 1972] 18301/72 Heading A5B A pharmaceutical composition having H-1 and H-2 histamine-receptor-inhibiting activity comprises (I) an antihistamine, (II) an H-*2 receptor inhibitor and (III) a pharmaceutically acceptable diluent or carrier, the H-2 receptor inhibitor being selected from: (a) thioureas of formula: wherein A together with the attached carbon and nitrogen atoms represents a basic heterocycle, X is H, C 1-4  alkyl, halogen or C 1-4  alkylthio, n is 3-6 and R is H, C 1-4  alkyl, aroyl, substituted aroyl, aralkyl or substituted aralkyl but not benzyl, (b) amidines of formula: wherein A together with the attached carbon and nitrogen atoms represents a basic heterocycle of 5 or 6 atoms, X is H, OH, CF 3 , amino, halogen, C 1-4  alkyl or C 1-4  alkylthio, n is 2-5, R 1  is C 1-4  alkyl, phenyl, substituted phenyl, aralkyl, alkylthioalkyl, -NHR 3  or SR 4 , R 2  is H, C 1-4  alkyl, aryl or aralkyl or (when R 1  is -NHR 3 ) CN or NO 2 , R 3  is H, CH 3 , aralkyl or amino or together with R 2  and the -N=C-NH- grouping represents a 5- membered ring, R 4  is C 1-6  alkyl, C 1-6  alkenyl or (CH 2 ) m Z or together with the -NH-C= NR 2  grouping represents a 5-membered ring, m is 1-3 and Z is aryl, substituted aryl, hydroxy, alkylamino, cyano, carboxy or aryloxy, (c) isothioureas of formula: wherein A together with the carbon and nitrogen atoms represents a basic 5- or 6-membered hetero-cycle, X is H, halogen or methyl, n is 2-4, R 1  is H or C 1-4  alkyl, R 2  is H, C 1-4  alkyl, amino or aralkyl or R 1  and R 2  together represent ethylene, (d) amidines of formula: wherein n is 3 or 4 and (e) pharmaceutically acceptable salts thereof. Many compounds are specified.
Patent GB-502389-A (GB)
Title: Improvements in or relating to the manufacture of hermetically sealed hollow bodies
IPC: D03D3/00
Filed: 1938-06-20
Abstract: 502,389. Woven inserts for hollow bodies. COW & CO., Ltd., P: B., and MANGOLD, S. June 20, 1938, No. 18303. [Class 142 (iv)] A hermetically sealed hollow body comprises a woven textile insert and a sealing layer applied to its outside, the insert having upper and lower surfaces connected by one, two, or more series (two shown in the Figure) of warp threads 7, 8 interwoven therewith at c, d and e, f and provided with loops 4. After these are cut, the surfaces can be displaced until the points 9, 10 and 11, 12 become superposed. The floating connecting warp thread take up a vertical position when the hollow body is inflated. The surfaces 1, 2 are preferably not connected at the selvedges, but if ,they are so connected, the tubular body formed is cut to make it non tubular. Specification 389,848 is referred to.
Patent GB-1037037-A (GB)
Title: Photographic printing apparatus
IPC: G03B27/80
Filed: 1963-05-09
Abstract: 1,037,037. Photographic printing apparatus. AGFA A. G. May 9, 1963 [May 10, 1962 (2)], No. 18435/63. Heading G2A. A photographic printing apparatus has means for image-wise exposure of the sensitive material, and also means for separate non-image-wise exposure of the same; variable means for controlling said separate exposure is coupled to means for influencing a photo-electric exposure device for controlling the image-wise exposure. In the embodiment of Fig. 1, the separate uniform exposure, for gradation variation, is effected by light source 2, and takes place prior to the image-wise exposure, effected by light source 1. The exposure regulating device comprises a circuit 7, having two potential dividers 18, 31. Potential divider 18, comprising several resistors in series and having tappings 21-24, is employed during the preliminary exposure. Potential divider 31, also comprising several resistors in series and having tappings 32-36, is employed during the image-wise exposure, and a change-over switch 66e switches one or the other potential divider into circuit. The photocell 10, shown as a multiplier, is disposed in the path of both the printing light and the additional light, and is connected to a timing capacitor 9 and to a valve 8 controlling a switching system 42. The dynodes of the multiplier are connected to the secondary of a transformer 59, whose primary is connected to a potential divider having series resistors 52-55. The variable resistor 52 sets the amount of printing light impinging on the printing material, and variable resistor 54 the amount of additional light. Variable resistor 55 is for density correction. The resistors of potential divider 18 are brought into circuit by respective switches 26-29, and those of potential divider 31 by switches 25<SP>1</SP>-29<SP>1</SP>. The pairs of switches 25 and 25<SP>1</SP>, 26 and 26<SP>1</SP>, &c. are operated together, as a pair, by corresponding press keys 73, 74, &c. (Fig. 2). These keys may have symbols 0-4, indicating stepwise increasing quantities of additional light, and hence increasing gradation variations, symbol "O" indicating an additional light quantity nil, i.e. no preliminary non-image-wise exposure, and symbol "4" indicating maximum additional light quantity. The sequence of operations is initiated by starter key 67. This causes the uniform non-image-wise exposure, controls its period, terminates it, automatically starts the image-wise exposure, and controls this also, by means of electromagnets 69, 68 which respectively open and close a shutter in the beam of the printing light 1.
Patent GB-1503892-A (GB)
Title: Lifting apparatus
IPC: B66F7/28
Filed: 1976-05-05
Abstract: 1503892 Lifting apparatus HOFMANN GmbH & CO KG MASCHINENFABRIK Gebr 5 May 1976 [17 July 1975] 18477/76 Heading B8L A lifting apparatus for vehicles comprises a vertically displaceable carriage 1 having at least one load supporting arm 3 mounted thereon for pivoting in a horizontal plane, and a clamping member 6 movable between an operative positive in which the arm 3 is clamped to resist pivotal movement and an inoperative position permitting free pivotal movement of the arm, the member 6 becoming operative once the carriage rises above a predetermined height. The clamping member 6 frictionally clamps a lug 5 on the arm 3 against the carriage 1 under the force of a spring 8, the latter being compressed to unclamp the arm as a depending part of the member 6 engages an adjustable abutment as the carriage is lowered. The force of the clamping member 6 may be increased by forming the member 6 as an eccentric or elbow member. In another embodiment the clamping member positively engages a recess in the arm.
Patent GB-774057-A (GB)
Title: Improvements in or relating to blocking-layer semi-conductor devices
IPC: H01L29/00
Filed: 1955-06-27
Abstract: 774,057. Semi-conductor devices. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 27, 1955 [June 30, 1954], No. 18501/55. Class 37. A semi-conductor device such as a transistor or crystal diode is immersed in a cooling liquid and above the liquid there is saturated vapour and the reduced pressure at the minimum operating temperature (e.g. room temperature 20 C.) is at least 0.01 and at the maximum operating temperature (60 C. for germanium and higher for silicon) is not more than 0.9. The term " reduced pressure " means saturated vapour pressure divided by critical pressure. The Specification recognizes that it is known to use cooling liquids having a boiling point in the region of and below maximum operating temperature. The present invention means liquid boiling and high heat dissipation during normal operation. In the example a glass or metal tube 1 contains saturated vapour 6 above propane coolant 5 which surrounds germanium transistor 4. The surface of transistor 4 in contact with liquid 5 may be smaller than 1 mm.<SP>2</SP> or 10 mm.<SP>2</SP>. The Specification comprises a list of suitable cooling liquids with corresponding critical and reduced pressure values. The list includes liquids for operating temperatures of 150 C. and - 10 C. The Specification also refers to " Electronics " of October 1953 which mentions the following cooling liquids: light petroleum, turpentine, carbon tetrachloride, benzene, trichloro-ethylene and paraffin.
Patent GB-978325-A (GB)
Title: Multi-wheel road roller
IPC: B60K17/34
Filed: 1962-05-14
Abstract: 978,325. Road rollers. SCHEID MASCHINENFABRIK G.m.b.H. May 14, 1962 [May 18, 1961], No. 18516/62. Heading A1B. A multi-wheel road roller is provided with a steerable front set of three wheels in which set the outer wheels 29, 31 are driven from the sun wheels 26 of a differential 27 and the centre wheel 24 is driven from the crown wheel 19 of the differential. As shown the drive is taken from a gearbox 9 and propeller shaft 36 to the differential 27. The gear box 9 is mounted in a frame 10 and the differential is mounted in a casing 15 which pivots on bearings of the frame. The wheel 33 runs in bearings in a leg 34 of the frame 10. Specification 898,969 is referred to.
Patent GB-275204-A (GB)
IPC: D01G15/76
Filed: 1927-07-12
Abstract: 275,204. Gegauff, C., and Pflimlin, J. July 30, 1926, [Convention date]. Carding-engines.-The roller or rotating member for clearing the main cylinder is provided with shields e situated in front of each longitudinal set of teeth d and extending almost to the tips of the teeth to prevent the loose fibres in the casing c becoming entangled in the teeth.
Patent GB-709352-A (GB)
Title: Fuel burner
IPC: F23D17/00
Filed: 1952-07-23
Abstract: 709,352. Liquid and gaseous fuel burners. NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ. July 23, 1952 [July 25, 1951], No. 18613/52. Class 75 (1) In a burner for the simultaneous combustion of liquid and gaseous fuels an auxiliary combustion chamber 3 for gaseous fuel is arranged around an atomizer 1 for liquid fuel so that the burning gas after leaving the chamber 3 impinges on the liquid fuel emerging from the atomizer, and the chamber 3 is fed exclusively with an oxygen-containing gas mixture. Part of the combustion air is fed through a tube 2 surrounding the atomizer 1. Preferably a gas-air mixture enters the chamber 3 from a supply chamber 4 through slits 5 at the inner edges of which flame stabilizing vortices are formed. Alternatively the stabilizing vortices may be formed by supplying the gas through circular apertures directed so that adjacent jets cross, or by supplying gas streams at different velocities. The mouth 7 of the chamber 3 converges almost to the cone of atomized fuel. A shield 6 protects the atomizer 1 from excessive heating by the gas flames. Secondary combustion air is supplied tangentially to the tubular main combustion chamber 8 through a conduit 9.
Patent GB-385873-A (GB)
Title: An improved machine for sharpening knives and other cutting devices
IPC: B24B3/54
Filed: 1932-07-01
Abstract: 385,873. Sharpening knives &c. STAINES, F., 94, Victoria Street, London. July 1, 1932, No. 18626. [Class 60.] V-slot and like blade shearpeners.-Apparatus for sharpening knives &c. consists of a pair of discs, having a number of curved surfaces, adapted to be rotated so that the surfaces of the discs alternately contact with the edge of the knife. In the construction shown in Fig. 1, the apparatus comprises a casing a<1> housing gearing, which when operated by a handle c, drives a shaft d upon which are mounted two discs e recessed to contain rotatable or non- rotatable hardened steel intermeshing balls f, which may be seated in the discs upon rubber or other resilient pads g ; in operation, the discs are rotated and the knife edge is drawn along in contact with the balls. Spaces may be left between the balls in each disc, and the balls in one disc may be larger than the others, and the pitch diameter of one series of balls may be larger than that of the other series. The gearing may be omitted and a direct drive substituted, and the discs may be spaced axially, Fig. 6, a rest i for the back of the knife being formed on the spindle so that one face of the edge only is treated at one time. In place of the balls, sheet metal discs may be used having rounded surfaces formed thereon by embossing or cutting ; or the surfaces may be separate and secured bv screws &c. Two sets of balls &c. may be employed for sharpening long knives ; the balls may be capable of radial motion so as to move outwardly to contact with the knife.
Patent GB-795823-A (GB)
Title: Process for the manufacture of a light constructional material, which can also be used inter alia as a packing or insulating material, and which contains expanded vermiculite
IPC: C04B28/26
Filed: 1955-06-28
Abstract: A constructional material is prepared by mixing expanded vermiculite, a water glass binding agent, and a mineral containing combined aluminium or combined magnesium, or which consists of calcite, to form a pulp-like to paste-like mass which is treated with a solution of a metal salt of pH value of 1 to 5, the metallic cation or cations of which has or each has an atomic weight of 24,32 to 65,38, the mass being progressively permeated by the metal salt solution, without any substantial disturbance of the mass, with formation of the metal silicate, whereafter the mass is dried and hardened.  The metal salt may comprise aluminium sulphate, chrome alum, magnesium sulphate, zinc sulphate, ferrous sulphate, or ferric chloride.  The mineral is preferably kaolin but may comprise magnesium oxide, talc, bentonite, or feldspar.  The mass of expanded vermiculite containing the water glass and the other additive may be permeated with the metal salt solution by immersing the mass in the latter, or the salt solution may be drawn by suction through the mass.
Patent GB-638080-A (GB)
Title: Improvements relating to electro-dynamic reproducers or loud-speaking telephones of the moving coil type
IPC: H04R9/04
Filed: 1947-07-14
Abstract: 638,080. Sound reproducing devices. WILLSON, H. C. July 14, 1947. No. 18686. [Class 40 (iv)] A centring device for the moving coil of a moving-coil loud-speaking telephone comprises two superposed layers of fabric formed with interstices which allow the passage of air but prevent that of dust particles, each layer having the form of an annulus and the second layer b being of smaller radial depth than the first - layer a. Preferably the fabric is impregnated with a synthetic resin such as that sold under the Registered Trade Mark " Bakelite " before the layers are stamped out. The two layers are superposed, and are corrugated as at f by placing them in a heated mould to a temperature sufficient to cause polymerization of the resin. Spokes c, d, e may be provided on the second layer b so that the leads g, h of the moving coil may each be housed between a spoke and the layer a. A strip k is then housed between the third spoke e and the first layer for balancing purposes.
Patent GB-1217692-A (GB)
Title: Improvements in and relating to drive transmission systems
Inventor: BROWN ALAN KEITH
IPC: D06F37/36
Filed: 1967-04-24
Abstract: 1,217,692. Change speed gearing. HOTPOINT Ltd. 24 April, 1968 [24 April, 1967], No. 18694/67. Heading F2D. In a washing machine drive transmission system speed control means, responsive to centrifugal force, tend to increase the ratio of output shaft speed as the speed of one of the shafts increases and inhibiting means, responsive to the system load, prevent operation of the control means in the ratio increasing sense until the load has fallen below a particular value. The pulley (1), Fig. 1b (not shown), which drives the horizontal inner clothes drum (not shown) of a washing machine, is driven by belt 2 from a grooved flange 3, Fig. 2a, of an intermediate pulley arrangement which includes a variable diameter pulley. The latter is driven via a belt 5 from a centrifugally expanding pulley 6 carried by the shaft 7 of a two-speed electric motor. The flange 15 of the pulley 4 is movable against the force of spring 16 to increase the effective diameter of the pulley unless it is prevented from moving by pivoted weights 21 which move outwardly under centrifugal force against spring loading. The flange 30 of pulley 6 is movable by bob-weights 33 to increase its effect diameter. Operation.-In the condition shown in Figs. 2a, 2b in which pulley 6 is driven at slow speed the centrifugal force due to weights 33 is insufficient to expand the pulley which remains at its smallest effective size and pulley 4 remains at its largest effective size. Increasing the driving motor speed increases the driving torque which is dependent on the load of the drum and is reduced as water is pumped out. Whilst the driving torque is heavy the tension in the drive side of the belt tends to separate flanges 15 and 3 so that flange 15 exerts pressure to the left on flange 17 which traps weights 21 and prevents them from moving outwardly. When the drum load decreases less driving torque is required and belt tension is lessened enabling the release of weights 21. Bob weights 33 are then able to expand the effective diameter of pulley 6 resulting in a corresponding reduction of the effective diameter of pulley 4 and increase in drum speed.