baber/WOPTO huggingface dataset:
Patent GB-642811-A (GB)
Title: Improvements in or relating to a gauging apparatus for toothed wheels
IPC: G01B5/20
Filed: 1948-05-12
Abstract: 642,811. Gauging toothed gears. AEPPLI, A. May 12, 1948, No. 13049. Convention date, May 30, 1947. [Class 106 (ii)] Apparatus for testing toothed gears 7, 8 by the single flank meshing method comprises a carriage 2 displaceable on a guideway of the bed 1 and may be moved by means of the spindle 3. A vertical shaft 4 is mounted rotatable on the carriage 2 and carries a cylindrical measuring disc 5 and the toothed wheel 7 to be tested. The latter and the disc 5 are rigidly secured to the shaft 4. Bevel gears 9, 10 drive the gears to be tested from a shaft 11 driven by a motor 14. A vertical hollow shaft 15 is journalled in the bed 1 and a. cylindrical measuring disc 6 is rigidly secured to the upper end of the shaft 15. The disc 6 is frictionally coupled to the disc 5, the-two discs being pressed against each other by means of the carriage 2 and the spindle 3. The hollow shaft 15 is traversed by a shaft 16 which is a sliding fit in the former. The second toothed wheel 8 is mounted on the shaft 16 and meshes with the toothed wheel 7. Relative movement between the shafts 15, 16, representing deviations from perfect meshing of the toothed wheels, are transmitted by a bellcrank lever 18, 18<SP>1</SP> mounted in a housing 17 on the foot of the shaft 16. A horizontal stud 19 secured to the hollow shaft 15 co-operates with the upright arm 18 of the bell-crank lever which transmits movements on to a lever 21, the free end of which carries a spherical tip S bearing on the head of a pin 22. A second bell-crank lever 24 transmits movements to a recording device 26, the drum of which, 27, is driven from the shaft 11 via the bevel gears 30. Deviations from perfect meshing thus appear in the form of a curve. Single flank meshing is obtained by means of light spring-loading applied between a pin 33 and a fork 32. The pin 33 is mounted in the hollow shaft 15 opposite the stud 19 and is connected to the fork 32 by two helical springs 34. The fork 32 is rocked on the journal 31 and then clamped tight to the latter by means of the screw 35. Discs of appropriate gear ratios may be substituted when testing toothed gears of other ratios.
Patent GB-297398-A (GB)
Title: Process for splitting hydrocarbons
IPC: C07C4/04
Filed: 1927-05-16
Abstract: 297,398. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). May 16, 1927. Olefines; diolefines. - Mineral or artificially prepared hydrocarbons containing more than four .carbon atoms in the molecule are converted into olefines and diolefines containing a smaller number of carbon atoms in the molecule than the initial materials by bringing their vapours, at normal or reduced pressure and at a temperature of at least 600‹ C., into contact with catalysts consisting wholly or for the most part of difficulty reducible metallic oxides or mixtures or compounds thereof, alone or in conjunction with supports. A metallic oxide is defined as difficultly reducible if it is not reduced to the metallic state in hydrogen at temperatures up to 600‹ C. The preferred catalysts consist of or are derived from the difficulty reducible oxides of metals situated on or near the maxima, of the atomic volume curve, and in this connection reference is made (1) to the oxides of the alkali and alkaline-earth metals (including magnesium and beryllium) and their oxygen-containing salts, such as aluminates, chromates, tungstates, vanadates, uranates, and phosphates, (2) to oxide combinations which readily emit electrons, such as strontium oxide-barium oxide combinations, alone or on a platinum substratum, and (3) to the oxides of scandium, titanium, yttrium, zirconium, lanthanum, tungsten, molybdenum, thorium, and uranium or mixtures of these or their compounds. The difficultly reducible oxides of metals situated on or near the minima of the atomic volume curve, such as aluminium, chromium, and zinc, are less suitable, but they may be used in the form of their salts with oxygen-containing acids of elements of the fifth, sixth, and seventh periodic groups forming not readily volatile oxides, such as phosphorus, chromium, and vanadium. The catalysts may be used in lump form or deposited on carriers, such as magnesium or aluminium silicate, and metals having a feeble dehydrogenating action, such as copper, platinum, molybdenum, or tungsten, may also be present. Metals having a strong dehydrogenating action, such as iron or nickel, are beneficial if added in small amounts. The process may be carried out in the presence or absence of gases such as nitrogen, carbon dioxide, and water vapour, but halogens or their .compounds, or substantial amounts of hydrogen, must not be present. According to the examples, (1) tetrahydrobenzene vapour is passed at 625‹ C. through a furnace made of porcelain, clay, or noble metal and charged with lumps of lime; the products are fractionally cooled and include ethylene, propylene, butadiene, and butylene; (2) hexahydrobenzene is passed at 600‹ C. through an apparatus made of or lined with quartz or clay and charged with cubes of calcium aluminate; the products include ethylene and butadienes; (3) the vapour of Russian benzine is passed at 625‹ C. through a metal apparatus internally enamelled and charged with lumps of lime; liquid unsaturated hydrocarbons are obtained.
Patent GB-669225-A (GB)
Title: Improvements in means for forming portable enclosures for stock, traction strips andfor other uses
IPC: E04H17/02
Filed: 1950-05-25
Abstract: 669,225. Fencing; slat fabrics. ANDERSON, J. W. May 25, 1950. [June 2, 1949; July 6, 1949; Feb. 21, 1950] No. 13198/50. Class 45. A portable fence or traction strip consists of a plurality of spaced, substantially parallel, slat like members 16 hinged together at two or more points in their lengths by a series of coupling devices each wound around a slat and locked to it by passing through it. Each coupling device comprises a wire having a loop 13 at one end by which it is linked to a neighbouring device, and two limbs 15, 17 which embrace the slat. Limb 17 has a U-shaped projection 18 which passes through a hole in the slat to be engaged by the limb 15 and the end of limb 17 after it has been passed round the side of the slat opposite to the loop 13, thus locking the coupling device to the slat. In a modification the U-shaped projection is omitted and the ends of the limbs pass through the aperture to engage the part of the limb 17 opposite the aperture. A washer may be provided on one or both sides of the aperture. Posts 24 may be attached to the slats by a clip 26 which has a loop 28 through which a stake may be passed to connect two posts together.
Patent GB-984948-A (GB)
Title: Self-adjusting bearing unit for the knife-edges of balances
IPC: G01G21/02
Filed: 1963-04-03
Abstract: 984,948. Bearings. MEPAG A.G. April 3, 1963 [Nov. 8, 1962], No. 13209/63. Heading F2A. [Also in Division G1] A self-adjusting bearing unit for the knifeedge of a balance has a bearing-block 1 with two frusto-pyramidal end-portions 2 having mounting faces which are in intersecting planes and which carry flat ground steel or agate plates 3. A plate 4 is mounted by means of balls 5 on each plate 3 and is held in position by spring-members 8 which are slotted at 9 to receive the plate 4. The members 8 are joined together by a piece 10 which may be attached to an end-portion 2 by a screw not shown. Lugs 11 are formed from the spring-members 8, each lug having a hole 12 therein to serve as a cage for a ball 5. Clearance is provided between the balls 5, and the holes 12, so that when a knife 6 is in position and pressure is exerted on the bearing, the balls are free to move away from the contacting sides of the holes 12.
Patent GB-140272-A (GB)
Title: Improvements in optical lantern arrangements
IPC: G03B23/10
Filed: 1919-05-26
Abstract: 140,272. Pellerey, R. V. May 26, 1919. Rotary cylinder apparatus, internally illuminated.-A series of slides 7 is carried step-by-step round an illuminant, pairs of lamps 12 being also provided so that transparent or opaque slides can be projected at will. One or more projectors 9 can be used, and the clutch 11 can be set to discontinue the exhibition after a given time.
Patent GB-1217836-A (GB)
Title: Polyol compositions
Inventor: HAGGIS GEOFFREY ARTHUR
IPC: C08J9/00
Filed: 1967-03-21
Abstract: 1,217,836. Polyol compositions; polyurethane foams. IMPERIAL CHEMICAL INDUSTRIES Ltd. 18 March, 1968 [21 March, 1967], No. 13251/67. Addition to 1,159,435. Headings C3C and C3R. A composition comprising a mixture of 100 p.b.w. of at least one polyol and 60 to 300 p.b.w. of a tris chloropropyl phosphate may be reacted with an organic polyisocyanate in the presence of a foaming agent to form a polyurethane foam which may contain isocyanurate rings. The polyol may be a monomeric polyol or polymeric polyols such as polyether and polyester polyols. To prepare foams containing an isocyanurate ring structure at least 1À7 equivalents of isocyanate group for each equivalent of active hydrogen in the reaction mixture is preferably used, the polyol is suitably a polyesterification product having an OH No. of 200 to 700 and not more than 1À5 branch points for each 1000 units of molecular weight and the reaction is carried out in the presence of catalysts for the polymerization of isocyanates, e.g. potassium acetate. Conventional blowing agents, surface active agents and catalysts may be added to the reaction mixture.
Patent GB-132782-A (GB)
IPC: H02K21/34
Abstract: 132,782. Weid, C. von der. Sept. 19, 1918, [Convention date]. Magnetos, driving.-In lighting-arrangements for cycles, and of the kind wherein the magneto a is adapted to be rocked upon a spindle l to bring the driving-roller g into and out of contact with the cycle tyre h, these members are normally kept in contact in known manner by a torsion spring o coiled around the spindle l, but are adapted to be separated by means of a 'lever s mounted on the magneto and provided with a cam s' bearing on a stop r fixed on the spindle l. The spindle can be rotatably adjusted with respect to the mounting p in two directions at right-angles and locked by means of two nuts m, q.
Patent GB-1300214-A (GB)
Title: Circuit arrangement for gas and/or vapour discharge lamps
IPC: H05B41/18
Filed: 1970-03-19
Abstract: 1300214 Starting and operating circuits for gas discharge lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 March 1970 [22 March 1969] 13320/70 Heading H2H A circuit arrangement for starting and operating a high pressure mercury vapour discharge lamp 4 shunted by a series circuit including a capacitor 6 and thyristor 7, the thyristor being triggered by means of a breakdown device such as a Zener diode 9 whereby the capacitor discharges to generate high voltage pulses which are used to start the lamp 4. When the terminals 1, 2 are connected to an A.C. source and the terminal 2 is positive the capacitor 6 charges by way of a diode 8. During the next half period when the terminal 1 becomes positive and the sum of the applied voltage and the capacitor voltage reaches a value sufficient to break down the Zener diode 9 the thyristor 7 is triggered whereupon the capacitor 6 discharges through the thyristor and then becomes charged in the opposite direction. When the current through the thyristor becomes zero and thereby cuts off, the capacitor 6 then recharges in the original direction by way of the diode 8. The voltage peaks caused by the charging and discharging of the capacitor are applied to the lamp 4 and repeat until the lamp fires. When the lamp fires the voltage across the capacitor-thyristor circuit falls and the circuit then becomes inoperative. In other embodiments a transformer is placed in series with the lamp 4 and the secondary winding thereof connected to the thyristor trigger electrode. Furthermore the Zener diode 9 may be connected in series with the diode 8.
Patent GB-931534-A (GB)
Title: Improvements in theatre lighting control apparatus
IPC: H05B37/02
Filed: 1961-04-13
Abstract: 931,534. Control systems for incandescent lamps. ELECTRONIC DIMMER CORPORATION. April 13, 1961 [Feb. 17, 1961], No. 13326/61. Class 38 (4). A supply system for theatre lighting systems comprises a pair of reversely connected controlled solid state silicon rectifiers 25, 26, the firing points of which are controlled by way of magnetic amplifiers 20, 22, which include gating windings 30, 31, bias windings 32, 33 and control windings 19, 21, the brilliancy of the lamps being set by means of a potentiometer 11 which controls the current in the control windings 19, 21 by way of a series transistor 15 ; the system being provided with a current transformer 61 which supplies two circuits 23, 24, the circuit 23 being effective by way of a second transistor 65 to bias the control windings 19, 21 of the magnetic amplifiers so that during the warming- up period of the lamps only a small current is passed by the controlled rectifiers 25, 26 whilst the circuit 24 provides overload protection for these rectifiers, the circuit 24 including a Zener diode 86.
Patent GB-839069-A (GB)
Title: Improvements in gum plastics
IPC: C08L25/08
Filed: 1958-04-28
Abstract: A composition comprises a mixture of a polymer A and a graft polymer B, the polymer A comprising from 70 to 85% styrene, alphamethyl styrene, a nuclear-substituted monomethyl styrene, or a mixture of such styrenes and from 30 to 15% of methacrylic acid, cinnamic acid, acrylic acid or a mixture thereof; the graft polymer B comprising 50-90% polybutadiene having grafted thereon 50-10% of a mixture consisting of from 70-85% styrene, alpha-methyl-styrene, a nuclear-substituted mono-methyl-styrene or a mixture of such styrenes, and from 30 to 15% of methactylic acid, cinnamic acid, acrylic acid or a mixture of such acids; the proportion of A to B being such that the mixture contains 15-30% of polybutadiene.  Both polymers are prepared by known methods, preferably by emulsion polymerization in latex form and are preferably blended while in this form.
Patent GB-599609-A (GB)
Title: Improvements in rotary engines, pumps or compressors
IPC: F02B53/00
Filed: 1944-07-12
Abstract: 599,609. Rotary engines &c. DEBNAM, H. G. July 12, 1944, No. 13358. [Class 110 (ii)] In a rotary engine or pump of the type in which the rotor has one or more oscillatory vanes mounted to oscillate about axes transverse to the axis of rotation to follow undulating stator surfaces, each vane is hollow and is mounted on n hollow spindle, cooling liquid being circulated through the interior of the vane and spindle. The invention is described as applied to a rotary internal-combustion engine, having one or more disc rotors 43, each mounted on a shaft 55 and cooperating with an annulus formed by a wall 46 and undulating walls 40, 41. Each rotor comprises vanes 44, shaped to fit the annulus, disposed in gaps in the rotor and pivoted about shafts 45. The working chambers 47, Fig. 3, on one side of each rotor form combustion spaces, and the chambers on the other side operate as a compressor. The carburetted mixture is drawn in through ports 51 and is exhausted through ports 52 and transferred by pipes 53 to engine inlet ports 48. Ignition is by sparking plugs 49, and exhaust takes place through ports 50. Oil from a tube 60 within the hollow shaft 55 is conveyed by way of ducts 61<2>, 61<1> and 61 to compartments 71 and thence through the hollow vanesrand vane spindles to provide cooling and lubrication, afterwards passing to compartments 72. From the latter, the oil is returned by way of ducts 72<1>, 72<2> and 72<3> to an annular space 60<1> between the tube 60 and the shaft 55. Lubricant may be injected into the working spaces. Cooling water is circulated through spaces 62. Transference of compressed mixture from the compressor chamber to the engine chamber may take place through non-return valves in the vanes themselves. The fuel may be injected. The invention may be applied to a steam or other gas engine or to a compressor or pump.
Patent GB-550463-A (GB)
Title: Improvements connected with devices for the removal of plaster casts or bandages
IPC: A61F15/02
Filed: 1941-10-17
Abstract: 550,463. Cutting plaster bandages. GREVILLE E. G. Oct. 17, 1941. No. 13412. [Class 81 (ii)] [Also in Group XXIII] A tool for the removal of plaster casts or bandages adapted to be operated by hand levers or electric motor and comprising a channelled cutter supported for reciprocation over an anvil and guided by a guiding element arranged parallel thereto has the sides of the channel 23 of the cutter 5 and the sides 33 of a shallow channel at the top of the cutter arranged to overlap the adjacent edge of the tool guide 19 and bear on slide faces 34 formed by rebating the edge of the guide whereby the entry of cuttings between the tool and the guide edge is avoided. A block 29 carried by wings 28 of the tool and guided in a slot 21 co-operates with cutters 30, 31 at the ends of the slot to break up any cuttings entering the slot. The anvil 20 has an inclined projection 32 in shearing co-operation with the channel 23 of the cutter which is carried by a plunger 4 reciprocated by a pivoted lever 2 and links 9 mounted in a body 3 having a projecting handle 1.
Patent GB-134573-A (GB)
IPC: C10J3/24
Abstract: 134,573. Smith, H. E. Aug. 3, 1918. Producers.-Relates to the valves and gearing for operating watergas plants, particularly of the type described in Specification 24893/08, in which gas-making is carried on intermittently. The air valves a, b, gas valves d, and stearm valve e are dry faced centre valves mounted on a single shaft F, by operating which through a quarter of a revolution intermittently the valves are suitably set for the blow and run in opposite directions alternately through a pair of twin generators. The shaft F may be operated by band or automatically by means of a floating bell G, Fig. 8, the interior of which is connected by a pipe L with the compressed-air supply pipe U, and which is normally held in its lowest position by trigger levers which may be released by a rising float R surrounding the bell. The bell is connected by rack-and-pinion and other gearing with the shaft F. The admission of compressed air and of atmospheric air to the bell G is regulated by a four-way valve M. Fig. 10. the admission of compressed air for the blow and run being regulated respectively by hand-adjusted valves Z<1>, Z<2>, according to the times required for these operations. When compressed air is admitted to the bell, the float R surrounding it rises and. after the required interval, releases the trigger levers which hold down the bell, whereupon the bell rises rapidly and operates the shaft F, and, by means of ratchet mechanism and a weighted lever arrangement, rotates also the valve M through a quarter of a revolution for the next phase of the operation.
Patent GB-1261573-A (GB)
Title: Organosilicon compositions convertible to the solid elastic state
IPC: C08L83/04
Filed: 1969-03-14
Abstract: 1,261,573. RTV silicone rubber compositions. UNION CARBIDE CORP. 14 March, 1969 [18 March, 1968], No. 13510/69. Heading C3T. A room temperature vulcanizable (RTV) composition comprises (1) a linear liquid organopolysiloxane having hydroxyl terminal groups and viscosity 500-50,000 cp. at 25 C., and (2) an epoxysilane wherein each X is an alkoxy radical and. Y is a divalent hydrocarbon or oxahydrocarbon radical of 1-18 C atoms. Preferred compositions contain 0À1-10 p.b.w. of (2), 0À1-5 p.b.w. of a metallic carboxylate curing catalyst, and 10-300 p.b.w. of a filler per 100 p.b.w. of (1). In examples, 100 p.b.w. of hydroxyl-terminated liquid polydimethylsiloxane is mixed with 2 p.b.w. of gamma-glycidoxypropyl trimethoxysilane with and without 60 p.b.w. of a silicate filler, or with 2 p.b.w. of beta (3 : 4-epoxycyclohexyl) ethyl trimethoxysilane and 42 p.b.w. ground quartz and 18 p.b.w. of a silicate filler, using 0À5 p.b.w. of dibutyltin dilaurate as catalyst in each case, and the mixtures are cured at room temperature, adhering well to primed metal.
Patent GB-135259-A (GB)
IPC: D21F7/02
Abstract: 135,259. Aitken, W. A. Nov. 15, 1918. Driving-mechanism.-The paper-machine is driven at a fast speed by the fast cone pulley D, but, for starting-up &c., the machine is driven at a slow speed from the loose pulley B, which drives the shaft C carrying the fast pulley D through the gearing F, J, J<1>, K and a three-part clutch L, M, M<1>. The part L of the clutch is carried by the loose wheel K, and the part M is prevented from moving axially on the shaft, and between these two parts is a shock-absorbing or cushioning layer of hard rubber or the like; the part M<1> is an ordinary sliding element of the clutch. The belt-fork is mounted on a screwed rod a which can be rotated and also slid longitudinally in bearings b, so that the strap may be adjusted on the conical surface of the fast pulley and also moved quickly from one pulley to the other; c is a stop for regulating the position of the strap on the fast pulley.
Patent GB-135392-A (GB)
IPC: F16H15/28
Abstract: 135,392. Wright, H. H., and Humphreys, T. Feb. 21, 1919. Motors, gearing for; casings; alternating-current motors.-Variable-speed mechanism for use with an electric motor comprises a spherical shell 5 rotated by the outer member 4 of the motor, an hemispherical cup 6 overlapping and concentric with the shell 5 and connected to the shaft 2 on which is keyed the other member 3 of the motor, and coned friction wheels 15, 16 engaging' respectively with the shell and cup and geared together through bevel pinions 17, 18, 19. The gear-box 14 is suspended by arms 10 journaled on studs 8 fixed to the framework 1; the speed of the shaft 2 is varied by swinging the arms 10 either manually or automatically so as to bring the wheels 15, 16 to bear against larger and smaller circumferences of the parts 5, 6. Pressure between the parts of the friction gearing is obtained by means of a cord 24 secured to a cross shaft 13 in the gear-box and attached to a counterweighted chain 23 passing over a sprocket wheel 22 which can be rocked by a handle 21. The motor shown on the Figure is of the induction type, the outer member 4 being wound with a short-circuited winding while the rotor 3 is supplied with the full line voltage through slip-rings on the end of a hollow shaft.
Patent GB-1421438-A (GB)
Title: Process for preparing grinding articles
IPC: B24D3/28
Filed: 1973-03-21
Abstract: 1421438 Abrasive articles SHERWINWILLIAMS CO 21 March 1973 [19 April 1972] 13546/73 Heading C4V A resin-bonded rigid grinding article is obtained by preparing a mixture of sufficient abrasive particles to provide an abrasive content in the mixture of 70-100% of the bulk density of the abrasive, a stress absorbing particulate spacer material and a curable resin binder, filling a mould with the mixture without application of pressure and curing without external pressure and change of pressure. The abrasive may be fused alumina, sintered alumina, silicon carbide emery, garnet, talc and pumice, preferably of grit size 600-10 mesh (U.S.A. Standard Fine Sieve Series). The spacer particles may be an organic resin or an inorganic material, e.g. polyurethane, polyethylene, polystyrene, epoxy, phenolic resin or silicone resin. The resin bond may be an epoxy resin.