baber/WOPTO huggingface dataset:
Patent GB-235562-A (GB)
IPC: F16H15/16
Filed: 1925-06-08
Abstract: 235,562. Pelterie, R. Esnault-. June 10, 1924, [Convention date]. Variable - speed friction gearing comprises non-epicyclic intermediate double tapered gear members B, Fig. 7. Driving and driven members axially aligned comprise paires of discs C<1>, C<2> and C<3>, C<4> the members of each pair gripping the rollers between them. The rollers B are supported upon links s, Fig. 8, upon pivots t fast upon a fixed casing u, so that the rollers can move towards and from the driving-shaft a. The discs C<3>, C<4> are pressed together by a spring R, Fig. 7, and have a double-helical connection o, p with the driven shaft r, so that the frictional grip upon the rollers B transmitted by the driving discs C<1>, C<2> increases with the load, the helices o, p varying suitably in pitch. The helices o, p coact with rollers secured inside a drum r<1> fast upon the shaft r. The speed ratio is controlled by positively moving the discs C', C<2> towards and from one another. For this purpose these discs are mounted on the shaft a and one upon another by multiple ball sliding key connections d, d<2>. The discs C, C<1> are secured to sleeves c<1>, c<2> which have screw threads of opposite hand engaging a single nut i. The nut i is loose on the shaft a and both rotate, and the necessary relative axial displacement of the discs C<1>, C<2> is effected by turning the nut i relatively to the shaft a. For this purpose two similar separate epicyclic trains are mounted side by side the planet gears y<5>, y<1> being mounted on a loose carrier y<3>. The gears y<5> mesh with a sun gear e' fast on the shaft a and with a fixed internal ring z<1>. The gears y<1> mesh with a sun gear n<2> fast on the nut i and with an internal ring z which can be displaced angularly by a manually controlled worm spindle g<1>. The shaft r may have a tail shaft r<2>, Fig. 14, through a simple reversing train p<2>, p<3>, C<5>. When a clutch member m<2> is slid upon the gear C' into engagement with a carrier disc Q, the gearing turns solid for forward driving. When a brake f<2> is opened upon the carrier Q the reversing train is operative. Alternatively the shaft a may be continued through the variably driven hollow shaft r as shown in Fig. 16. A direct drive is obtained when a clutch sleeve g<3> upon the tail shaft r<2> engages a clutch head f<8> on the shaft a. The sleeva g<3> may engage a variably driven clutch head f<4> on a reversely driven clutch ring f<7>. The Specification as open to inspection under Sect. 91 (3) (a) comprises also illustrations of forms of intermediate members B other than the double tapered form retained. This subjectmatter does not appear in the Specification as accepted.
Patent GB-1498049-A (GB)
Title: Polyimide precursors
IPC: C08G73/00
Filed: 1975-04-11
Abstract: 1498049 Polyimide precursor solutions WESTINGHOUSE ELECTRIC CORP 11 April 1975 [3 May 1974 22 Oct 1974] 14894/75 Heading C3R  A curable polyimide precursor solution is made by mixing (a) a cyclic tricarboxylic acid monoester and/or a cyclic tetracarboxylic acid diester, the, or each, ester group being vicinal to a separate carboxyl group but not to another ester group, (b) a dianhydride and(c) an aromatic diisocyanate and then heating the mixture until the viscosity no longer increases, the molar ratio (a) : (b) being from 3 : 7 to 6 : 4, the amount of (c) being within 5% of stoichiometric, and the mixing being effected either by dissolving (a) and (b) in a solvent before adding (c) or by dissolving (c) in a solvent before adding a mixture of (a) and (b). The solution may be applied to a surface and heated to evaporate solvent and cure the precursor, e.g. on a flat surface to form a polyimide film or on a wire to form an enamel. In a preferred embodiment the precusor is precipitated with a non-solvent and then redissolved, the resulting solution giving less brittle cured films. The esters are preferably those of C 1-4  alkanols obtained by reacting the alkanol and an appropriate anhydride. In specific examples (b) is pyromellitic or benzophenol or tetrahydrofuran-tetracarboxylic dianhydride; (a) is the dimethyl ester thereof or monomethyl trimellitate; (c) is diisocyanotodiphenyl methane; the solvent is N-methyl pyrrolidone; and benzyldimethylamine is used as catalyst.
Patent GB-697949-A (GB)
Title: Improvements relating to the control of grinding machines
IPC: B24B47/18
Filed: 1952-06-13
Abstract: 697,949. Grinding. FORTUNA WERKE SPEZIALMASCHINENFABRIK AKT. - GES. June 13, 1952 [June 16, 1951], No. 14915/52. Class 60. [Also in Group XXIX] Means for automatic regulation of the grinding wheel speed in grinding machines is characterised by the feature that the grinding surface or grinding edge of the grinding wheel is placed in the path of a jet and a measuring appliance associated with the jet operates a relay when the measured value changes as the grinding surface moves out of the jet, which relay adjusts the position of the jet and at the same time the speed of the grinding wheel. A nozzle 4 is carried by the rod 2 of a piston 15 so that on displacement of the rod 2 the nozzle 4 moves parallel to the side of the grinding wheel 1 and so close to the wheel that a jet of cooling water leaving the nozzle encounters a resistance at the wheel which results in an increase in the pressure in a pipe 5 supplying water to the nozzle. The pipe 5 is connected to a gauge chamber 6 having a movable diaphragm 7 which operates through rod 8 a valve 9 loaded by a spring 19. The valve 9 controls the admission of pressure oil to, and exhaust from, one end 12 of the cylinder 3 containing the piston 15. The pressure of the jet is adjusted by a throttle valve 16 so that in the normal operating position of the jet the pressure in the gauge chamber 6 reaches such a value that the control valve 9 is in a central position, in which the cylinder space 12 is cut off from both supply 17 and exhaust 18. The piston rod 2 is acted on by a spring 13 and is toothed to engage a pinion 10 which controls an infinitely variable gear in the grinding wheel drive. In operation, as the wheel wears, the jet automatically follows the edge and the angular velocity of the wheel is automatically increased to maintain the peripheral speed constant.
Patent GB-720617-A (GB)
Title: Rotary fans
Inventor: ODD RICHARD SIDNEY
IPC: F04D29/38
Filed: 1952-06-16
Abstract: 720,617. Axial-flow fans. WILMOTBREEDEN, Ltd. April 14, 1953 [June 16, 1952], No. 15072/52. Class 110 (1). An axial-flow fan comprises hollow blades a of rubber or the like, within the open ends of which are bonded hollow metal spigots b on which are formed tangs c for securing the blades to a central boss d. The tangs are inserted through slots in the periphery of the boss, bent over and welded to the boss. The boss is made of sheet metal. The Provisional Specification describes also a construction in which the boss comprises two sheet metal parts, one of which is inserted concentrically within the other. The blades are inserted through slots in the outer part and have enlarged inner ends which are gripped between the two parts.
Patent GB-1442543-A (GB)
Title: Method and apparatus for selectively backwashing or replacing a filter media in a continuously filtering liquid purifying system
IPC: B01D29/62
Filed: 1974-04-04
Abstract: 1442543 Continuous filtration with selective back washing KOPPERS CO Inc 4 April 1974 [23 April 1973] 15099/74 Heading C1C A method of backwashing or replacing adsorbent filter medium in a fixed filter bed of a continuously filtering liquid purifying system comprises: (a) sequentially isolating a selected portion of the filter medium from the remainder of the filter medium; and (b) selectively backwashing laden adsorbent filter medium, or replacing spent adsorbent filter medium in the isolated portion; while filtering of contaminated liquid through the remainder of the filter medium continues. Apparatus is described in some detail for the automatic backwashing or replacement of adsorbent filter medium as above which -comprises isolating means and selection means. The filter medium used may include activated granular carbon or a zeolite.
Patent GB-206183-A (GB)
Title: Heat treatment of manganese steel
IPC: C21D6/00
Filed: 1922-05-29
Abstract: 206,183. Marks, E. C. R., (American Manganese Steel Co.). May 29, 1922. Modifying physical characters of metals.-Manganese steel castings are heated indirectly in an inert atmosphere in an electric furnace, preferably of the resistance type, to a temperature between 960‹ C. and 1025‹ C. sufficient to redissolve the carbides separated out during casting. The heated castings are then suddenly cooled, as by quenching in water.
Patent GB-512079-A (GB)
Title: Improvements in the separation of nickel and copper
IPC: C01G53/00
Filed: 1938-05-20
Abstract: 512,079. Extracting cobalt and nickel from matte. JOHNSON, G. W. (I.G. Farbenindustrie Akt.-Ges.). May 20, 1938, Nos. 15108/38 and 14105/39. [Class 1 (iii)] Nickel and cobalt are recovered free from copper by treating nickel-copper and cobaltcopper mattes having a sulphur content between one-third and one-fifth that of copper with acid such as hydrochloric or sulphuric. The optimum sulphur content is apparently one-quarter, and this may be obtained by blowing air through or mixing sulphur with the molten matte. The matte should preferably be in the form,of an aqueous suspension or if the particles are too large be kept in motion with stirring. In examples, boiling acid from 5 to 20 per cent. strength dissolves in a period of two hours up to 97 per cent. of the nickel, and 94 per cent. of the cobalt contents of their respective mattes.
Patent GB-581052-A (GB)
Title: Improvements in or relating to automatic check valves and check valve assemblies
IPC: F16K15/02
Filed: 1944-08-09
Abstract: 581,052. Valves. WEIR, Ltd., G. & J., and HILLIER, H. Aug. 9, 1944, No. 15187. [Class 135] A check valve, particularly for use in hydraulic pumps, comprises a plane faced valve disc 12 co-operating with a plane seating and having a rear recess 14 formed by a coned rim which interacts with a tapered recess in a cover or plug 17 to limit both the lift and lateral movement of the valve disc. A spring 15 may be accommodated in the recesses of the plug and disc. A similar disc valve 6 co-operating with a plug member 10 is provided in the suction intake 3. A plurality of valve members may be provided forming a multiple valve assembly. Specification 534,109 is referred to.
Patent GB-1026692-A (GB)
Title: Method for protection of the surfaces of building structures
Inventor: RICHARDSON BARRY ARTHUR
IPC: C04B41/49
Filed: 1961-04-27
Abstract: In Examples 2 to 5, a siloxane containing biologically toxic triorgano tin radicals is formed in situ from a petroleum solvent solution of a methylsiloxane resin and tri-n-butyl tin oxide, bis-(tri-n-butyl tin) oxide or bis-(tri-methyl tin) oxide.  Uses.-For rendering masonry and wood building structures water-repellent and/or resistant to biological attack (see Division B2).ALSO:The surfaces of masonry or wood building structures are protected from biological attack by applying thereto, as by dipping or spraying, a solution of a siloxane containing biologically toxic radicals and optionally water-repellent radicals.  In Example (1) a penetrating petroleum solvent solution of a methylsiloxane resin and a phenylsiloxane resin was sprayed on to a damp external masonry wall and cured to form an algicidal and water-repellent polymeric coating.  In the remaining examples a petroleum solvent solution of a methylsiloxane resin and tri-n-butyl tin oxide bis (tri-n-butyl tin) oxide or bis (trimethyl tin) oxide is used for treating bricks, cedar shingles, exterior walls or Portland limestone headstones.  Where water-repellency is important and the amount of tin compound is insufficient to kill any algae present but sufficient to inhibit re-establishment of algae growth, the surface may be pre-heated with an algicide, e.g. calcium hypochlorite, a phenol or a quarternary ammonium compound.
Patent GB-529151-A (GB)
Title: Improvements relating to warping machines
IPC: D03J1/00
Filed: 1939-05-23
Abstract: 529,151. Dust &c. confining on generation. REINERS, W., (trading as SCHLAFHORST & CO., W.). May 23, 1939, No. 15326. Convention date, June 22, 1938. [Class 8 (ii)] To guard a warper against dust &c. a transparent screen 15 is arranged immediately behind the beam 2 and reed 12 and connected with the starting &c. lever 6 so that the screen is lowered into the position shown when the machine is started ; it may be raised automatically when the machine is stopped owing to a broken &c. yarn.
Patent GB-1447921-A (GB)
Title: Cigar and cigarette lighter
IPC: F23Q2/46
Filed: 1974-04-05
Abstract: 1447921 Pocket lighters G LAURI 5 April 1974 [6 April 1973] 15336/74 Heading F4F A gas-fuelled cigarette lighter is actuated by a push-button 4 which firstly opens a cover 14 and rotates a friction wheel 16 against which a flint 17 is spring biased and then after the major part of the button's stroke is completed opens a valve 6 connecting a fuel reservoir 9 to a burner 8. The wheel and cover are pivoted about a common pin 15 and the cover is provided with lugs 23 which engage with grooves 26 provided on an extension of the button. The valve is actuated by a portion 28 of the button contacting a lever 12. The pin is held between two flexible arms 19 which facilitates assembly.
Patent GB-1322875-A (GB)
Title: Device for the pressure control of a vehicle brakes control medium
IPC: B60T11/34
Filed: 1972-04-04
Abstract: 1322875 Fluid pressure brakes USTAV PRO VYZKUM MOTOROVYCH VOZIDEL 4 April 1972 [26 April 1971] 15391/72 Heading F2F A brake pressure limiting device for hydraulic brakes has a housing 2 with an inlet port 8 which is connected to a master cylinder 4 and an outlet port 11 which is connected to the rear brake cylinders 6, the diameter of inlet port 8 being smaller than the diameter of outlet port 11 so that an increase in pressure from the master cylinder is attenuated by the inlet port before being transmitted to the brake cylinders and a valve 1 does not close abruptly.
Patent GB-275176-A (GB)
Title: Improvements in or relating to screening apparatus
IPC: B07B1/28
Filed: 1927-06-09
Abstract: 275,176. Robins Conveying Belt Co., (Assignees of Baldwin, C. K., and Robins, S. D.). July 29, 1926, [Convention date]. Sieves with compound motion.-In screening- apparatus for ore, crushed rock, sand, gravel, &o. of the type in which an unbalanced rotary mass causes each point of the screen to move in a circular orhit in a vertical plane, the screen is mounted on a live frame which is supported from the fixed frame by springs which also act to maintain the tension of the screen. As shown in Fig. 6, the movable sieve frame consists of two side members 6 carrying a shaft 2 on which rotates a drum 1 provided at each end with a pair of annular members 16 weighted at one point. The unbalanced effect of the masses is varied by adjusting the members of each pair angularly with respect to each other, and the parallelism of the axis of inertia with the axis of rotation is maintained by making the same adjustments at each end of the drum. The side members are flexible and are supported from a fixed base 28 by bolts 31 and springs 35. The screen cloth c is clamped along its edges by gripping plates F and bolts 37 which pass through blocks secured to the side members by tensioning screws 27. The side frames are connected by slidably mounted bars to which is connected one or more longitudinal bars bearing on the screen cloth for the purpose of suppressing independent. vibrations.
Patent GB-1055525-A (GB)
Title: Improvements in carburetors for internal combustion engines
IPC: F02M11/02
Filed: 1965-04-12
Abstract: 1,055,525. Spray carburetters. SOCIETE INDUSTRIELLE DE BREVETS ET D'ETUDES S. I. B. E. April 12, 1965 [April 1, 1964], No. 15519/65. Heading F1B. Fuel nozzles 7 and 8, opening into parallel mixture passages 1 and 2 respectively, are supplied with fuel from a common float chamber 12 through a conduit 20 provided with a metering orifice 23, through which fuel passes to fuel wells 21 and 26, supplying nozzles 7 and 8 respectively, the well 21 including a further metering orifice 24. Each well contains a tube 25 or 27 which communicates with air intake 13 for aerating the fuel fed from the nozzles. For idling, a passage 30 receives fuel from well 21 via a metering orifice 28 and air from the intake 13 via a metering orifice 29, and communicates with the passage 1 through orifices 31, 32, the latter being adjustable. A throttle valve 4 in the passage 2 remains closed until a manually operated throttle valve 3 in the passage 1 is opened sufficiently for an abutment secured to its spindle 11 to abut a lever secured to the spindle 17 of the valve 4, further opening of the valve 3 then opening the valve 4.
Patent GB-985450-A (GB)
Title: Semi-conductor devices
IPC: H01L29/00
Filed: 1962-04-24
Abstract: 985,450. Semi-conductor devices. SIEMENS-SCHUCKERTWERKE A.G. April 24, 1962 [April 22, 1961], No. 15644/62. Heading H1K. A semi-conductor body having a PN junction between planar faces with an impurity concentration gradient between the junction and one face and electrodes on the faces is subjected to etching or mechanical treatment to remove some of the semi-conductor material to increase the distance along the surface between the limits of the space charge region around the junction. This reduces the field strength and lessens the tendency to breakdown. Fig. 1 shows a semiconductor body 1 with PN junction 4 and electrodes 5 and 6. Material is removed to provide a new surface provided by generatrix line 11. Line 11 may be curved convex or concave or both. Fig. 8 shows an etching jet 23 arranged for controlled removal of material from semiconductor body 22 which is mounted on a turntable. Chemical or electro-chemical etching may be employed. Silicon, germanium and A 3 B 5  compounds are referred to and the PN junction may be provided by diffusion from both sides, or diffusion from one and alloying from the other.
Patent GB-1345393-A (GB)
Title: Pneumatic tyre more particularly for bicycles or motor  bicycles
IPC: B29D30/48
Filed: 1971-05-19
Abstract: 1345393 Pneumatic tyres CONTINENTAL GUMMI-WERKE AG 19 May 1971 [25 June 1970] 15697/71 Heading B7C [Also in Division D1] The parallel cords comprising the reinforcing plies of a pneumatic tyre are composed of continuous polyamide plastics material filaments, the cords having a binding twist of between 20 and 300 turns per metre, preferably 180 turns per metre, to hold the filaments together and the material being so chosen that the filaments shrink by less than 3%, preferably between 1À5 and 2%, when subject to a temperature of 190‹ C. during vulcanization of the tyre. The cord fabric prior to rubberizing has a weight of between 50 and 80 gms. per square metre. During manufacture the distance between the bead cones of the tyre blank in the flat band state, is made greater by 6% than the distance between the bead cones of the completed shaped and vulcanized tyre measured over the interior area of the tyre.
Patent GB-1434658-A (GB)
Title: Optical particle detectors with light scattering test device
IPC: B65G57/30
Filed: 1973-08-03
Abstract: 1434658 Smoke particle detector using scattered light ELECTRO SIGNAL LAB Inc 30 Oct 1973 [25 July 1973] 50507/73 Heading G1A An optical particle detector comprises a housing with lamp 8 to direct light on a path along its axis A1 into dark chamber 6 enclosed therein and with photo-sensitive device 13 responsive to light scattered by particles in said path and a particle simulating member 20 movably mounted on the housing with portion 24 movable through the path for scattering a known intensity of light to photosensitive device 13. The housing comprises bottom 1 and top 2 and cylindrical side wall 3, bearing foam pads 4, admitting smoke but not light. Exciter lamp 8 has filament coil 9 with a straight axis and lens 11 beams light through passage 12. Cell 13 views chamber 6 through lens 18 on axis A2 120 degrees from axis A. Photo-cell 14 receives direct light from lamp 8 to balance aging effects of cell 13. The cells 13, 14 are connected through terminals 17, 19 to alarm circuit board 15. Preferably the alarm operates at 2-10% smoke obscuration. Simulator 20 comprises a wire bell crank with fingergrip 21, shaft 22, held in snap sockets in bosses 26, and spot welded 34 S.W.G. wire 24 used to scatter light from detector zone Z and angularly offset by 25 degrees from U-bend 23, whose rotation is limited by a set screw. Preferably the whole of simulator 20 has a dull black oxide finish with a light waxing.
Patent GB-630309-A (GB)
Title: Work holder for glass-working lathe
IPC: H01J5/26
Filed: 1946-05-24
Abstract: 630,309. Chucks. STANDARD TELEPHONES & CABLES, Ltd. May 24, 1946. No. 15819. Convention date, May 28, 1945, [Class 83 (iii)] [Also in Group XXXVI] A chuck for resiliently holding a metal element, such as an apertured copper disc 17, to which glass is secured by heat for use in electric discharge devices, comprises a head 10 secured to one end of a metal tube 4, the other end of which is fitted with an adaptor 3 for attachment to the face-plate 2 of a lathe. The disc 17 is clamped between an insulating-ring 14 on the head 10 and jaws 23, 24, 25, which are pivoted on an axiallymovable rod 29 and provided with slots 31 traversed by cross-pins 30 in the head as the jaws are moved from the open position (Fig. 1) into the closed position (Fig. 2). For actuating the rod 29, a sleeve 39 is slidable on the rod between adjustably-spaced fixed collars 35, 36, a coil-spring 42 being fitted between the sleeve and stop 36. An operating-handle 40 fixed to the sleeve 39 engages a bayonet-slot 41 in the tube 4. As shown, a glass bead 46 is being sealed to the feather-edge of a flange 18 on the disc 17 by a source of heat 47, dissipation of heat to the tube 4 being restrained by the insulating ring 14 and the constricted neck 9 of the head 10.
Patent GB-1428553-A (GB)
Title: Thermoplastic adhesive compositions
IPC: C09J7/10
Filed: 1973-04-03
Abstract: 1428553 Craft polymer composition EXXON RESEARCH & ENG CO 3 April 1973 [3 April 1972] 15822/73 Heading C3G A hot melt adhesive coating composition comprises a 10 to 300 melt flow rate polymer grafted with 0À1 to 50 weight per cent of a monomer in an extruder reaction in which the grafted polymer has a melt flow rate at least 25% higher than the polymer before grafting and in which the monomer comprises (1) a C 3 -C 10  unsaturated monocarboxylic acid; (2) a C 3 -C 10  unsaturated polycarboxylic acid; (3) an anhydride of (1) or (2); (4) a salt, ester, ether, amide or nitrile derivative of (1), (2) or (3); (5) a thio, glycidyl, cyano, hydroxy or glycol substituted derivative of (1), (2) or (3); or (6) a mono vinyl aromatic compound, a C 6 -C 50  vinyl ester, an allyl ester or monomer having more than 2 vinyl groups. Additionally the compositions may contain an elastomer selected from ethylene/propylene copolymers and ethylene/propylene diene monomer elastomers, polyisobutylene elastomers, butyl rubber elastomers, chlorobutyl elastomers and combinations thereof. Block copolymers of ethylene and propylene, random copolymers of ethylene and propylene with each other and with vinyl and allylic monomers such as vinyl acetate, styrene, acrylic acid and acrylates may also be included in the compositions. Tackifiers and waxes are also mentioned and exemplified as useful additives. Comparative examples describe the evaluation of physical properties of modified polypropylene graft polymers.