baber/WOPTO huggingface dataset:
Patent GB-1134326-A (GB)
Title: Improvements in or relating to electron guns
IPC: H01J3/02
Filed: 1966-02-03
Abstract: 1,134,326. Electron guns. MINNESOTA MINING & MFG. CO. 3 Feb., 1966 [26 March, 1965], No. 4873/66. Heading H1D. An electron gun with axially aligned filament, control electrode and anode comprises a heat sink 14, which supports the filament and grid, a conductive anode support 15 and an insulating gas impermeable spacer element 13 interposed between the heat sink and the anode support, wherein the heat sink is formed in two halves insulated from each other by a thin electrically insulating gas impermeable layer 16, the filament has an apex portion from which depend a pair of legs, each of which is electrically connected to a different half of the heat sink, and an apertured plate-like grid is supported, transversely of, and with its aperture coaxial with, the gun axis near the filament apex, by supports extending from the heat sink. The heat sink and anode support may be of aluminium and the filament may be a tungsten coil or ribbon of the hairpin type with its apex flattened by grinding and each leg may be demountably connected with its half of the heat sink. Conductive pins 63 with insulating sleeves are cemented in a bore in each half of the heat sink to secure and locate the grid 56 relative to the filament. The grid may be detachably secured to the pins 63 by a double bent wire 69 engaging in corresponding holes in the grid and pins. Electrical connection may be made to the grid by extending one of the bores housing the pins 63 and embedding in the insulating cement a conductive element secured to a pin 63 and a terminal mounted on the sink, Fig. 3 (not shown). Bolts which extend through holes 76 in the sink and through holes 78 in the spacer to clamp the two together may also be used to connect an electrical supply to the filament. The anode may be screwed into a projecting sleeve within an enlarged axial bore in the rear end of the anode support 15, Fig. 3 (not shown). The anode support is bolted to the spacer element and sealing rings may be provided to render all such joints gas impermeable so that the whole unit can be exposed to the atmosphere. A pump is connected to aperture 34 in the anode support. A shroud (80) consisting of a wafer of conductive material covered by an insulating layer, Fig. 10 (not shown), may be provided between the heat sink and the grid to provide insulation between the two and protect the filament legs from damage.
Patent GB-438765-A (GB)
Title: Process for the manufacture of microporous rubber compositions
IPC: C08L21/00
Filed: 1935-02-15
Abstract: Microporous rubber is made by admixing rubber and a hydrophilic colloid in the non-or partly-hydrated state and subjecting the mix to the action of water and vulcanizing the rubber.  Such hydrophilic colloids include clays of the bentonite or zeolite type, artificial zeolite, cellulosic fibres ground to colloid fineness, gums such as tragacanth, agar-agar, and karaya, gelatine, or silica gel added as such or formed in situ.  The mixture may be soaked in water or an aqueous solution before vulcanization which is preferably carried out in steam or water or this vulcanization may provide the water for swelling the colloid. In examples, rubber and sulphur are mixed with bentonite or powdered sodium silicate or a mixture of two or more of the colloids, the proportions being rubber 25, sulphur 10, colloid 65. When sodium silicate is used, soaking in an acid or acid salt solution converts it into gel.
Patent GB-947385-A (GB)
Title: An improved fastener
Inventor: FERNBERG ERIC BIRGER
IPC: A47F5/00
Filed: 1960-02-11
Abstract: 947,385. Spring clips. F. T. PRODUCTS Ltd. Jan. 27, 1961 [Feb. 11, 1960], No. 4909/60. Addition to 880,263. Heading E2B. A fastener in the form of a single strip of resilient material bent so as to have a body 11 and a substantially Z- shaped head 12 comprises a web 12B and two flanges 12A, 12C, the web being inclined at a small angle to the direction which is perpendicular to the general direction of the body, the flanges 12C being joined to the body and the other flange 12A having one end free and forming with the web an apex 12D, the covex side of which is directed towards the body, the flange 12C being of greater width than that part of the body to which it is joined and a portion of the flange being bent in a direction away from the head to form a shoulder which is spaced longitudinally of the body from the apex and there being sheared and bent from the body a prong the free end of which is directed towards the head. As shown there are two shoulder forming portions 13, 14 and two prongs 15, 16. The fastener is used for securing two panels together at right angles the body being inserted into a slot in one of the panels where it is retained by the prongs 15, 16 and with the shoulder forming portions engaging the edge of the panel and with the other panel retained by the head against the edge of the first panel.
Patent GB-857630-A (GB)
Title: Pipe connection
IPC: F16L15/06
Filed: 1959-02-12
Abstract: 857,630. Shaft couplings. AMERICAN IRON & MACHINE WORKS CO. Inc. Feb. 12, 1959 [Feb. 26, 1958], No. 4962/59. Class 80 (2). [Also in Group XXVIII] In a connection for drill shafting comprising a drill collar connector box 14 and a drill collar pin 12 radially and axially shrink - fitted thereto, the box 14 is provided on its interior surface with a tapered land 50 which merges with a cylindrical surface 63, a generally cylindrical screw - threaded portion 21 with a root thread diameter smaller than the diameter of the surface 63, a cylindrical area 64 having a diameter larger than the root thread diameter, and a cylindrical socket 32 of smaller diameter than the crest diameter of the thread, the bottom 25 of the socket being perpendicular to the axis of the box. The pin 12 has on its exterior surface a tapered land 51 seizingly engaged with the land 50, a cylindrical surface 62 of smaller diameter than that of the land 51 and facing the surface 63, a generally cylindrical screw-threaded portion 20 engaging the threaded portion 21 and with a root thread diameter larger than that of surface 62, a cylindrical nose 30 engaged with the socket 32 and having a diameter smaller than that of the pin thread root, and a cylindrical stem 40 radially spaced from the socket 32 and having a length greater than the thickness of the stem, the end 24 of the stem being perpendicular to the axis of the pin and in engagement with the bottom 25 of the socket 32. The lands, nose, socket, socket bottom and stem end are smooth finished to form a fluid-tight seal when the box 14 is shrink fitted to the pin 12. U.S.A. -Specification 2,636,753 is referred to.
Patent GB-208667-A (GB)
Title: Improvements in and relating to insulators and methods of making the same
IPC: H01B17/12
Filed: 1923-02-22
Abstract: 208,667. British Thomson - Houston Co., Ltd., (General Electric Co.). Feb. 22, 1923. Forming silica-glass articles.-A tube with an enlarged closed end is made of fused quartz by immersing an electrically heated carbon core 11 in quartz grains until an encrustation of fused quartz 1 of the desired thickness is obtained. After cooling, the core is removed by drilling and a hollow head formed on the shell by sealing its end by heat and expanding by air-pressure.
Patent GB-1062420-A (GB)
Title: Preparation of 6-a-9-adifluorosteroids
IPC: C07J75/00
Filed: 1966-02-07
Abstract: In a process for the preparation of 6a , 9a -difluoro - 16 - methylene - 1,4 - pregnadiene-3,20-dione-11b ,17a -diol and the corresponding 11 - ketone from 6a  - fluoro - 16 - methyl - 4,6-pregnadiene-3,20-dione by epoxidizing the D 16-double bond followed by splitting of the 16a , 17a -oxido steroid with the formation of a 16-methylene group, microbiologically introducing an 11-hydroxyl group, introducing a 9a -fluorine atom, introducing a D 1-double bond, and optionally oxidizing the 11-hydroxy compound to the 11-keto compound, the microbiological 11-hydroxylation is carried out first and the epoxidation after the D 1-dehydrogenation, whereby the yield is improved.  In examples (1) the starting material is 11a -hydroxylated with Metarhizium anisopliae, the 11a -ol is D 1-dehydrogenated with 2,3-dichloro-5,6-dicyano-benzoquinone or Corynebacterium simplex, the product is converted to the 16a ,17-epoxide and this is split to 6a  - fluoro - 16-methylene - 1,4 - pregnadiene - 11a ,17a  - diol-3,20-dione, this is dehydrated to the D 9(11)-compound and this converted via the 9b , 11b -epoxide to the required 9a -fluoro-11b -ol, and this is oxidized to the 11-one; (2) the starting material is 11b -hydroxylated with Curvularia benata, the 11b -ol is dehydrated to the D 9(11)-compound, this is D 1-dehydrogenated with dichlorodicyanobenzoquinone, or selenium dioxide or Corynebacterium simplex, the product is epoxidized and split and the resulting 6a -fluoro - 16 - methylene - 1,4,9(11) - pregnatrien-17a -ol-3,20-dione is converted as in (1) to the 9a -fluoro-11b -ol; (3) the D 1,4,16-pregnatrien-11a -ol prepared in the second stage of (1) is converted via the 11-tosylate to 6a -fluoro-16-methyl - 1,4,9(11),16 - pregnatetraene - 3,20-dione which is then converted to the required product as in (1) and (2); and (4) the 11b -ol prepared in the first stage of (2) is dehydrogenated to 6a  - fluoro - 16 - methyl - 1,4,16-pregnatrien-11b -ol-3,20-dione and this is then dehydrated and converted to the required product.
Patent GB-894702-A (GB)
Title: Improvements in and relating to organic polymers and production thereof
IPC: C07C49/835
Filed: 1961-02-13
Abstract: A copolymer of a monomer CH2 = CHR1, (R1 is H or alkyl of 1 to 4 carbon atoms) and a minor amount of a monomer. <FORM:0894702/IV (a)/1> (R2 is H or alkyl of 1 to 3 carbon atoms and R3 is C4 to C7 tertiary alkyl) is obtained by catalytic polymerization and the copolymer is then isolated and rearranged by heating in an inert anhydrous liquid and with a Friedel-Crafts catalyst to form a linear polymer containing substituted phenone units. <FORM:0894702/IV (a)/2> (R2 is H or alkyl of 1 to 3 carbon atoms and R3 is C4 to C7 tertiary alkyl).  The original copolymer may be obtained from typical monomers such as ethylene, propylene, butene, pentene, hexene, p-tertiary-butylphenyl methacrylate and p-tertiary -butylphenyl acrylate, by the use of a wide variety of specified organic peroxides, or azo compounds, or combinations of compounds of transition metals with metal hydrides or organometallic compounds. Polymerization may be in bulk, or in aqueous or organic medium and may be batchwise or continuous.  In Examples 2 and 3 the catalysts are vanadyl trichloride + aluminium triisobutyl, the monomers are butene + p-tertiary -butyl phenyl acrylate or propylene + p-tertiarybutyl phenyl methacrylate and purification of product is with methanolic HCl and methanol.  The rearranged products of the invention are resistant to degradation by U.V. light and find application as film, filament, tubing and coatings in greenhouses, screening, garden hose and automobile exteriors.  Specification 783,487 is referred to.
Patent GB-578732-A (GB)
Title: Improvements relating to the generation of time-modulated pulses
IPC: H03K7/08
Filed: 1940-03-21
Abstract: 578.732. Pulse modulation; cathoderay tubes. STANDARD TELEPHONES & CABLES, Ltd., and BEATTY, W. A. March 21, 1940, No. 5269. [Classes 39 (i) and 40 (v)] Pulses having a time function characteristic of a sound or other signal wave are generated by repeatedly deflecting a cathode beam across a target and varying the mean position of the beam in accordance with the amplitude of the signal wave. The arrangements shown in Figs. 1a-1c produce pulses similar to those described in Specification 523,575. Line 23; Fig. 1a, shows the normal trace of the beam relative to the target 22 under the control of a saw-toothed or like deflecting wave. If the deflecting wave is modified by a sound &c. wave, or if the sound &c. wave is applied to the same deflecting system or to an auxiliary one, the overlap of the trace on the target is modified as shown in Figs. 1b, 1c, so that variable duration impulses are generated. The dotted lines represent the position at constant time intervals and the direction of scan is that indicated by arrow 28, the leading edges of the pulses occur at variable intervals, but if the direction of scan is reversed, the trailing edges are variable. The narrow target, Fig. 4, produces short pulses occurring at variable time intervals which may be used for the double pulse system described in the above-mentioned Specification or may be superimposed on the leading or trailing edges of variable duration pulses to produce the pulse forms described in Specification 524,671. If a wider target is used, Fig. 5 (not shown), the duration of passage of the beam across the target is dependent on the amplitudes of the sound wave at the beginning and end of a scanning period so that the pulses are characteristic of the rate of change of amplitude. The target may be fluorescent, or secondary emissive, or its effective shape may be determined by a screen, or it may produce pulses of radio-frequency by modulating the beam with a carrier as described in Specification 535,701.
Patent GB-675397-A (GB)
Title: Polymeric vinyl ethers and a process of producing them
IPC: C08F16/12
Filed: 1950-03-02
Abstract: Vinyl methyl ether, or a mixture of a preponderating amount of vinyl methyl ether and a smaller amount, preferably 5-25 per cent of vinyl ethyl, n- or iso-propyl, or n- or isobutyl ether, is polymerized at a temperature between 75 DEG  C. and the decomposition temperature of vinyl methyl ether, in the presence of a polymerization catalyst which is boron trifluoride or its addition product with water or an alcohol, ether, acetal or lactone.  The products are oily compounds soluble in aliphatic hydrocarbons, and may be used as softening agents for nitrocellulose, cellulose ethers, chlorinated rubber, polyvinyl chloride and polystyrene.
Patent GB-808984-A (GB)
Title: Pipe joints
Inventor: CLIFT ALFRED
IPC: F16L47/22
Filed: 1956-02-21
Abstract: 808,984. Pipe couplings. STEWARTS & LLOYDS Ltd. Jan. 14, 1957 [Feb. 21, 1956], No. 5304/56. Class 99(1). A spigot of a coupling piece b is pushed into and enlarges an end a, of a pipe of thermoplastic material of a kind which can be expanded by an internally applied force and a sleeve d of hard polythene or similar material which may be expanded and has an inherent tendency to contract embraces the pipe end tightly. Sharp circumferential ridges c on the spigots embed in the inner surfaces of the pipes. The coupling b may be made of a corrosion resisting metal or of thermoplastic or thermosetting material or of synthetic rubber of the styrene-butadiene type. The sleeve d is slipped over the pipe end prior to the insertion of the spigot and may have either a smooth bore or ridged bore, the ridges of the latter corresponding to the ridges on the socket. The sleeve thickness should not be less than 0À08 inch and if made of polythene the molecular weight of the material should be not less than 95,000. After insertion of the spigot, the pipe ends should be expanded by at least 0À05 inch, and the sleeves which are clear of the enlarged ends, being further along the pipes, are forced over the enlargements so as to compress the pipe ends on to the spigots. The material of the sleeves should be such to provide at least a minimum free shrinkage of 10 per cent. after expansion. To accelerate the shrinkage of the sleeves on the expanded pipe ends, heat may be applied at a temperature of 100‹C. as e.g. by immersion in boiling water.
Patent GB-373229-A (GB)
Title: Improvements in or relating to echo sounding apparatus and subaqueous signalling apparatus
IPC: G10K11/00
Filed: 1931-02-20
Abstract: 373,229. Nonconducting coverings for sound. TELEGRAPH CONSTRUCTION & MAINTENANCE CO., Ltd., 38, Old Broad Street, and LEDGER, A. H., 29, Mycenae Road, Blackheath, both in London. Feb. 20, 1931, No. 5454. [Class 64 (ii).] The seaweec composition known by the registered Trade Mark " Ca bots Quilt " may be used as the sound - insulating material covering the inside of a cell in a ship's double bottom used for housing a hydrophone, a wooden framing holding the material in place. The manhole cover MHC is also heavily lagged with sound proofing CQ.
Patent GB-545066-A (GB)
Title: A new or improved method of crowning gears and apparatus therefor
IPC: B23F1/02
Filed: 1941-04-28
Abstract: 545,066. Gear-grinding. NATIONAL BROACH & MACHINE CO. April 28, 1941, No. 5509. Convention date, July 15, 1940. [Class 83 (iii)] [Also in Group XXIII] In a method of and apparatus for crowning the surfaces of gear teeth in order to localise the tooth bearing and allow for misalignment of shafts of mating gears a formed grinding wheel is passed axially through the gear teeth while the gear is rocked in unison so that .the grinder removes more metal at the ends of the teeth than at the centre. In one form the formed grinding wheel 19 is mounted on a vertically adjustable slide 14 while the work gear mounted on an arbor 51 is supported between centres 41, 42 carried by a platform 30 which can oscillate about a centre 31 and is carried by a slide 20. The slide 20 also supports trimming mechanism 21 which can be brought up to the grinding wheel by an ex-. tended movement of the table to the left, Fig. 1, The platform 30 moves on ball races 33 and carries a head 40 for indexing the work. The rocking movement is effected by a slotted member 61 carried by the platform 30 and angularly adjustable by worm gearing 64. A gauge pin 66 on the slot member coacts with a gauge pin on the platform 30 for accurate setting of the slot member. The slot 62 is engaged by a pin 71 carried by a part 70 which is vertically adjustable by a pinion 73. In operation the blank 50 preferably after heat treatment is positioned and the slide 20 translated without rocking the platform 30 to perform a rough grinding operation on both sides of the gear. The grinding-wheel is then trimmed so as to provide clearance of the wheel in the ground tooth slots. The gear is then located in its central position, Fig. 1, and the pin 71 engaged in the slot of the adjusted member 61. The slide is then traversed in both directions from the mean position and the blank indexed from tooth to tooth thus crowning one side of all the teeth. The gear blank is then again placed in its median position and readjusted angularly so that the wheel engages one of the uncrowned tooth surfaces. The slotted member is readjusted to the opposite inclination and the operations repeated to crown the opposite tooth surfaces. In a modification, Fig. 5, the platform is mounted to tilt about a horizontal axis and is operated by a roller engaging a slot in an angularly adjustable member 87. In this form the intermediate trimming of the grinding wheel is not required and both sides of the teeth are crowned simultaneously. For crowning helical gears the grinding wheel is set over to the required helical angle and the gear is rotated during its translation. The high point of the crown may be adjusted to different positions along the teeth and may be different on opposite sides of the teeth.
Patent GB-658335-A (GB)
Title: Improvements in or relating to plain bearings and the manufacture thereof
IPC: B22F7/04
Filed: 1949-03-01
Abstract: In a method of making a composite bearing by powder metallurgy [see Group XXII], a copper-plated mild steel backing is spread with a first powder layer comprising equal parts of copper powder, lead bronze powder comprising 80 per cent copper, 10 per cent lead and 10 per cent tin and bronze powder comprising 89 per cent copper and 11 per cent tin and then with a second powder layer each particle of which contains 70 per cent copper and 30 per cent lead.  The composition of the final sintered bearing material is 70 per cent copper, 29 per cent lead and 1 per cent tin.
Patent GB-255360-A (GB)
Title: Improvement in guard fingers and ledger plates for mowing machines
IPC: A01D34/18
Filed: 1926-03-01
Abstract: 255,360. Hover, C. F. March 1, 1926. Mowing-machines.-Each finger-bar 10 is fitted with a detachable ledger plate 17 provided at its forward end with a central pivoted projection 19 and having the corners of its rear end cut away. The oblique parts 18 of the end are bevelled to engage corresponding bevels on the walls 16 of a recess 15 formed in the rear end wall 12 of the finger. The plate 17 is pressed into firm engagement with the walls 16 by a spring 14 situated in a socket 13 formed in the forward end of the finger. The sides of the plate are bevelled upwardly to provide cutting edges for engagement with the knives and a recess 20 is formed at its rear end for the insertion of a nail when removing or replacing the plate.
Patent GB-137176-A (GB)
Title: Improvements in optical reversing devices for facilitating the copying of drawings and the like
IPC: B43L13/18
Filed: 1919-03-08
Abstract: 137,176. Taylor A., and Taylor, H. D. March 8, 1919. Reflectors.-A front-silvered plane mirror M, used in copying drawings, reducing maps, &c., is mounted in an air-tight casing B, plane-parallel glass windows w being provided through which the central ray passes normally. The mirror is held between three pairs of pallets 3, 4, 5, each pallet being flat on the surface pressing on the mirror, but hollowed out on its other face to receive the ends 6 of screws or pins. The screws at the back secure the mirror to a supporting-plate b, and the pins in front are spring-urged so that the mounting allows of thermal expansion. A rubber ring r, which can be screwed down on to the supporting-plate, also makes for flexible mounting for the mirror and for the windows. An air-tight box in the bottom of the chamber holds chemicals intended to absorb water vapour or sulphuretted hydrogen, either of which might tarnish the silvered surface. The mirror may be mounted in accordance with the method described in Specification 7392/10. A lens or camera may be attached to the casing.
Patent GB-1334199-A (GB)
Title: Coupling device for connecting mains supply to a carrier rail
IPC: H01R25/14
Filed: 1972-02-08
Abstract: 1334199 Two-part couplings A REINING- HAUS 8 Feb 1972 [11 Feb 1971] 5822/72 Heading H2E A coupling device for connecting mains supply to a carrier rail A comprises a rectangular casing 13 open along one side, having a removable lid 39 in the opposite side and a plug-in portion 14 extending from one end adapted to be inserted into the rail and containing four current carrying contacts (15), 16 and an earthing contact 32 for connecting with conductor bars R, S, T, Mp and 11 in the track. The device is inserted into one end of the track and clamped therein by means of a guide plate 23 and a clamp plate 24 which are drawn together by a screw 41 so that they clamp around a web 28 of the track; the clamp plate 24 having an extension (24a) complementary with a guide 25 in the rail to ensure correct orientation. Each contact (15), 16 is resilient, anchored at one end 16b and protrudes at its other end 16a under the action of a spring 20 for engaging a respective conductor bar; screw-bushes 21, 50, 30 for receiving cables from the mains supply are provided at the one end of the contacts 16, (15), 32 respectively. The mains cables may be fed through an opening 36 in the other end of the casing or through the opening having the removable lid 39, the latter opening accommodating a collar (37) for supporting the cables. Other couplings devices may have two, three or four plug-in portions for connection to a plurality of rails. A stop-end (F) for the rail may be formed by omitting the contacts (15), 16, 32 from a coupling device.