baber/WOPTO huggingface dataset:
Patent GB-711254-A (GB)
Title: Process for the manufacture of boron nitride
IPC: C01B21/064
Filed: 1952-08-25
Abstract: Boron nitride is produced by passing chlorine gas through boron carbide heated to above 300 DEG  C out of contact with air or oxygen, immediately mixing the boron trichloride produced with ammonia and immediately heating the mixture to 500 DEG C and ultimately raising the temperature of the mixture to at least 1600 DEG C out of contact with air or oxygen, and filtering the reaction product to remove boron nitride.  Dry chlorine is fed at 12 into graphite tube 15 surrounded by casing 15a containing heat-insulating material. Tube 15 is packed with lumps or grains of boron carbide and heated by a resistance heater to about 400 DEG C.  The boron trichloride formed is passed directly to 20 and passes through tube 21 into graphite tube 23, which is heated by current supplied through water cooled electrode clamps <PICT:0711254/III/1> and bus bars 24, 25, and is surrounded by casings 23a, 23b containing heat-insulating material. The tube 21 ends at a point where the temperature in tube 23 is at least 500 DEG C.  Excess ammonia enters at 26 and after mixing with the boron trichloride passes through graphite baffles 30, which create turbulence where the temperature is at least 1800 DEG C. Graphite tube 27 is provided for measuring the temperature by optical pyrometer.  The reaction products pass out through air or water cooled pipe 32 to woven glass fabric filter 41 for removal of boron nitride.  Hydrogen chloride may be recovered from the waste gases, mainly nitrogen and hydrogen, by scrubbing.  The filter may be at 335 DEG C. or above, e.g. above 500 DEG C., but is preferably kept at below 100 DEG C.
Patent GB-148700-A (GB)
Title: Improvements in or relating to electric lamp holders, fitments and the like
IPC: H01R33/46
Filed: 1919-08-30
Abstract: 148,700. Preston, W., (trading as Saunders & Co., W.). Aug. 30, 1919. No Patent granted (Sealing fee not paid). Holders.-An insulating-block c, Fig. 1, carry - ing rigid contacts d, retains a supporting-fitting b within a socket a into which both are inserted from the front. The accket a and the fitting b are urged apart by a spring g. Pins e on the insulator are secured in bayonet-slots f<2>, Fig. 2, which may have a common entrance with other bayonet-slots f<3> for the reception of the lamppins. The pins e may be moulded from the material of the insulator. A diametrical projection c<1> on the insulator engages a recess in the member b to prevent rotation of the insulator. The insulator may have two raised walls c<2> partially surrounding the terminals d.
Patent GB-780138-A (GB)
Title: Improvements in or relating to machines for machining conducting material by means of electric discharges
IPC: B23H1/02
Filed: 1955-07-26
Abstract: 780,138. Automatic control systems. ATELIERS DES CHARMILLES SOC. ANON. July 26, 1955 [Aug. 7, 1954], No. 21546/55. Class 38 (4). In electric spark erosion apparatus a condenser which discharges to produce the sparks is charged from a D.C. source in series with an inductance of such a value that the interval between sparks is not greater than one quarter or the natural period of oscillation of the circuit and the average value of the voltage across the spark gap controls a servo-mechanism adjusting the gap. In Fig. 7 a condenser C, connected between an electrode E and work P to be machined by electric spark erosion is periodically discharged to produce a succession of sparks through the work. Between successive sparks condenser C is re-charged from D.C. mains a, b through a resistance R and an inductance L. The circuit constants are so chosen that the interval between successive sparks is not greater than a quarter of the natural period of oscillation of the circuit. The voltage between the electrode E and work P is applied in opposition to a reference voltage obtained from a potentiometer V and the resultant voltage smoothed by an inductance S. This resultant voltage, which represents deviation of the average value of the voltage between the electrode and the work from a desired value set by potentiometer V, controls electromagnetically a pneumatic or hydraulic servomechanism M adjusting electrode position to maintain constant spacing between the electrode and the work. A modification omitting resistance R is described.
Patent GB-873887-A (GB)
Title: Slide holders for use with picture projecting apparatus
Inventor: DAVIS PETER HOLLAND
IPC: G03B23/04
Filed: 1959-06-24
Abstract: 873,887. Magazine slide holders. ALDIS BROS. Ltd. May 11, 1960 [June 24, 1959], No. 21635/59. Class 97(1) A magazine slide holder having an open side includes a spring-loaded barrier engaging the lower parts of the forward edges of the slides which may be depressed by a part contained in the projector to clear the slide edges and so allow their passage into the film gate of the projector. As shown in Fig. 1 the spring-loaded barrier is a bar g integral with, or secured to, a plurality of spring blades h so that as the magazine is pushed past the deflector plates p (in either direction) in the projecting apparatus, the bar is gradually tilted to successively free those slides approaching the film gate o, and then to move gradually into the fully obstructive position.
Patent GB-1461679-A (GB)
Title: Screw-actuable dispensing device for high viscosity fluid products
IPC: G01F11/02
Filed: 1974-05-15
Abstract: 1461679 Screw actuated dispensers DENTAL-VERWALTUNGS GmbH 15 May 1974 [8 Jan 1974] 21642/74 Heading F1R A screw actuated piston dispenser includes a material housing 10 having an outlet 12 and closed at the bottom end by a piston (30). A threaded ring 40 is fixed to the bottom end of the housing by the engagement of a bead 13 thereon in a shouldered groove 44 in the ring 40. A threaded actuator 20 is engageable with the ring 40 and has a portion 20b for engagement with the piston (30). Indicia 48, 22 are provided so that measured quantities may be delivered.
Patent GB-137098-A (GB)
Title: Improvements in wireless telephone transmitters
IPC: H03C1/22
Filed: 1918-12-24
Abstract: 137,098. Turner, L. B., and Wagner, R. H. Dec. 24, 1918. Wireless telephony; electric oscillations, producing.-A wireless telephone transmitter comprises a relatively feeble valve oscillator 3 in which the amplitude of oscillation is controlled by the voice, and a valve amplifier 4 serving to amplify the valve-controlled oscillation. The mean anode potential of the oscillator 3 may be varied directly by a microphone or by a control valve 11. In the arrangement shown in Fig. 1, the anode battery 12 of the control valve is connected to the anode through a choke coil 13, and the anode is connected to the anode battery 14 of the oscillator 3. Alternatively, the microphone or the control valve may vary the grid potential of the oscillator or may control the amplitude and frequency of the oscillation in the oscillator by introducing more or less resisttance into its circuit. The potential of the battery 10 in the grid circuit of the amplifier may be such that the grid never becomes positive. In order to reduce or prevent radiation except when the microphone is disturbed by speech, the anode potential of the oscillator 3 may be just insufficient to allow it to generate oscillations except when the anode potential is raised by the fluctuation of the microphone current. The microphone may be replaced by an electro-magnetic transmitter.
Patent GB-694052-A (GB)
Title: Apparatus for making and dispensing tea, coffee and like infusions or beverages
IPC: A47J31/44
Filed: 1950-09-02
Abstract: 694,052. Heat-retaining vessels. HARRISON, E. March 8, 1951 [Sept. 2, 1950], No. 21703/50. Drawings to Specification. Class 64 (ii) [Also in Groups XVIII and XXIX] A counter urn, similar to the portable urn described in Specification 679,394, [Group XVIII], wherein a double walled milk container with insulating material between the walls is mounted inside a like container holding tea may alternatively have one container mounted beside the other in a common outer housing, Fig. 7 (not shown).
Patent GB-387008-A (GB)
Title: Improvements in and relating to race game apparatus
IPC: A63F9/14
Filed: 1931-07-30
Abstract: 387,008. Race games. WALTON, A. L., 5. 2nd Avenue, Blackpool. July 30, 1931, No. 21721. [Class 132 (ii).] A race game apparatus comprises a number of container vessels 4 and a number of receiver vessels 1, each container being permanently connected to a receiver by a flexible tube 3 so that liquid may be transferred 'from the container to the receiver, and vice versa, by varying the liquid levels in the vessels by means under the control. of a competitor. Each container is mounted on a vertical rack 5 and is adapted to be raised to transfer its contents to the corresponding receiver by a reciprocating pawl 10 that is connected, through lever 8 and rod 7 to actuating means controlled by a competitor. The container is held in raised position by a detent 11 until the latter is disabled by a rod 14, when the container returns to normal position by gravity. In a modification, the container vessels are fixed, and the liquid levels are varied by displacement members that are lowered into the containers by means such as winding drums rotatable by the competitors.
Patent GB-862419-A (GB)
Title: Batchwise copolymerization technique
Inventor: MARKUS RICHARD L
IPC: C08F36/20
Filed: 1957-07-09
Abstract: A batch process for the preparation of swellable cross-linked copolymers of mono-ethylenically unsaturated compounds with from 0.01 to 2.0% by weight of a polyethylenically unsaturated compound comprises reacting the monomers in the presence of a polymerisation catalyst and in a medium consisting of at least 1/2 molar aqueous solution of a salt of an inorganic acid which is represented by one of the following formul : M++A-; M++A2-; and M2+A-, where M++ is a cation of a metal of Group I of the Periodic Table with the exception of copper and gold, A- is an anion derived from an acid exhibiting a basicity of 2, and A- is an anion derived from a monobasic acid. Monoethylenically unsaturated monomers listed include acrylic and methacrylic, and fumaric and maleic, acids, salts and derivatives thereof, styrene and substituted styrenes, vinyl ketones, esters and heterocyclic derivatives among others, and the poly-unsaturated monomers also listed include butadiene, isoprene and higher dienes, divinyl benzene and diallyl derivatives. Catalysts include benzoyl, acetyl and di-t-butyl peroxides, 2,21-azobisisobutyronitrile, potassium persulphate, cumene hydroperoxide, and tetraphenyl- and tetra-p-methoxyphenyl succinodinitrile, and the salts mentioned are those of barium, beryllium, cadmium, calcium, magnesium, strontium, zinc, sodium and potassium.  Conventional suspending agents and protective colloids may be used with a reaction temperature from room to reflux and the product is in bead form.  Examples describe the use of magnesium sulphate, magnesium and potassium sulphate, beryllium and calcium chlorides, and secondary sodium phosphate in the formation of copolymers of acrylic acid and divinyl benzene, 3,4-dihydroxy2,5 - dimethyl - 1,5 - hexadiene, 4,6 - dihydroxy-4,6 - dimethyl - 1,8 - nonadiene, 2,4,6,8 - tetramethyl - 4,6 - dihydroxy - 1,8 - nonadiene, 1,1,3,3, tetra-allyl - 1,3 - dihydroxypropane, p-diisopropenylbenzene; methacrylic acid and ethyl acrylate, acrylamide, methylenediethylmalonate, styrene, 2-methyl-5-vinylpyridine, N-vinyl pyrrolidone, N-vinyl phthalimide, N.N-dimethylacrylamide, 2 vinyl pyride with divinyl benzene; mixtures of diethyl fumarate and styrene, acrylamide and acrylic acid, methacrylic acid and styrene, acrylic acid and styrene, methylene diethyl malonate and diethyl fumarate or ethyl acrylate with divinyl benzene.  The swellable resin products may be used as pharmaceuticals or intermediates.  Specifications 707,647 and 714,750 are referred to.
Patent GB-1117877-A (GB)
Title: Appliance for manipulating fittings with screw-threaded fastenings
IPC: H05K13/00
Filed: 1966-05-17
Abstract: 1,117,877. Wrench. YORKSHIRE ELECTRICITY BOARD, G. MEGSON, and D. ALSTON. 12 May, 1967 [17 May, 1966], No. 21751/66. Heading B4W. A device for screwing fittings into overhead electric power lines from a remote position, comprises a pole S secured to a casing 1 by a bolt 13, and a spring-urged sleeve 5. Casing 1 has a slot 3 through which a ring-ended fitting R can be passed and then rotated by 90 degrees, so that it engages a curved seating 4 in the casing. Sleeve 5 has internal grooves 7 for engagement with the ring, and external grooves 8 which co-operate with pegs 9 in casing 1. In operation, ring R is forced through slot 3 against the action of spring 10, and turned through 90 degrees, so that the spring holds the ring against seating 4, and the ring is located in grooves, 7. The operator rotates pole S and the fitting is screwed into the line.
Patent GB-460853-A (GB)
Title: Improvements in greenhouses and other portable buildings
IPC: A01G9/16
Filed: 1935-07-31
Abstract: 460,853. Greenhouses and like portable buildings; roofs. CRITTALL GREENHOUSES, Ltd., and..WALKER, F. P. July 31, 1935, No. 21768. [Classes 20 (i) and 20 (iv)] A portable greenhouse or other building comprises a series of built-up metal arch members B, B<1>, Fig. 1, and spacing panels C mounted on and bolted to a base of L-section girders 1, 2. The arch members are of cruciform section, the uprights being inclined inwardly so that when buildings are placed side by side, room is allowed for guttering. The arches are preferably connected by an I- section ridge member 29 as shown in Fig. 12. The uprights have extensions 11 for bolting to the base at 5 and the outer flange rests in a slot 4, Fig. 7. The panels have L-section members resting on the base and are secured thereto by brackets 24, Fig. 9, and are secured to the arch members by integral flanges. The gutters are supported on slotted brackets 42 beneath an extension of the roof and mav drain into tanks through pipes 40, Fig. 6. According to the Provisional Specification, a water tank may comprise an inner and outer section divided by and bolted to a panel. Holes in the panels connect the two sections.
Patent GB-169858-A (GB)
Title: Improvements in soap
IPC: C11D9/24
Filed: 1920-07-20
Abstract: A toilet soap consists of about 5 parts of the preparation of soap, alcohol, and pine oil or paraffin oil described in Specification 15643/15, mixed with about 95 parts of soap, preferably by milling.
Patent GB-826546-A (GB)
Title: Production of conjugated diolefins
Inventor: OLDHAM WILFRED JOHN
IPC: C07C2/86
Filed: 1957-07-10
Abstract: Conjugated diolefines are prepared by reacting acetaldehyde or formaldehyde with a monoolefine of not more than 6 carbon atoms in the vapour phase over a synthetic petroleum cracking catalyst containing 0-10% of an oxide of a Group IIa metal.  The mono-olefine is preferably a tertiary olefine and may be isobutene, 2-methylbutene-2 or 2-methylbutene-1.  Formaaldehyde may be introduced as industrial formalin containing 36-40% by weight of formaldehyde or as a substance which produces formaldehyde under the reaction conditions, e.g. paraformaldehyde or trioxane.  The proportion of aldehyde in the reaction mixture is preferably below 10 mol. per cent and this may be achieved by using an inert diluent such as nitrogen, a lower paraffin, carbon dioxide or steam.  Reaction temperatures of 150-400 DEG  C. can be used with contact times of up to 5 seconds.  Atmospheric pressure or just above is preferred although others can be employed.  The catalyst may be, for example, silica-alumina, silica-magnesia, silica-zirconia, silica-boria or silica-titania.  If an oxide of beryllium, magnesium, calcium, strontium or barium is present the proportion should be below 10%. Silicaalumina containing about 85% silica is preferred.  The pore size of the silica is preferably above 30  .  The catalysts may be activated by heating to above 500 DEG  C. and reactivated by heating in air to burn off carbon.  Fixed, moving or fluidized beds can be used.
Patent GB-888814-A (GB)
Title: Improvements in and relating to combine harvesters
IPC: A01D41/04
Filed: 1959-06-25
Abstract: 888,814. Combine harvesters. CLAAS, H. June 25, 1959 [July 7, 1958], No. 21880/59. Class 6(3). In a combine-harvester having a hydraulic system for controlling the position of the cutterbar or reel using a manually-operable controlvalve, mountings, Fig. 2, are provided at various places to receive the control-valve. In Fig. 1 the control-valve 6 is attached to fluid-lines 8, 9, 10 and controls the movement of the piston 15 of a ram 7 connected to the reel (not shown). The valve is mounted on a plate which slides into a pocket formed by flanges 24 on a fixed plate 21. Several such plates 21 are mounted at various places on the chassis of the tractor 1 propelling the harvester.
Patent GB-923619-A (GB)
Title: Improvements in or relating to the dividing of rolled stock into definite lengths
IPC: B23D36/00
Filed: 1961-06-16
Abstract: 923,619. Length measuring. SCHLOEMANN A.G. June 16, 1961 [June 18, 1960], No. 21880/61. Class 106 (2). [Also in Group XXII] A method of dividing finished lengths of rolled stock into commercial lengths or into cooling bed lengths by means of shears arranged beyond a continuous rolling mill train, characterized in that the finished lengths are measured by measuring the transit time of the strand at the beginning of the train of rolls by means of an impulse frequency generated synchronously with the speed of revolution of the last finishing roll stand, then dividing the measured finished lengths by calculation into commercial lengths or cooling bed lengths, by sub-dividing the number of impulses corresponding to the transit time of the finished length into smaller partial numbers which correspond to the commercial lengths or to the cooling bed lengths and finally cutting the finished lengths into commercial lengths or into cooling bed lengths corresponding to the calculated partial numbers. A continuous mill train 2, 3, 4 is followed by a shear 5 and a cooling bed 6. Beside the first roll stand is a photo-electric cell A and beyond the shear 5 are two photo-electric cells B, C, at least one of which is displaceable in the direction of rolling. An impulse emitter 8 is connected to the last roll stand. When the leading end of a billet passes the cell A a circuit is completed between the emitter 8 and a counting mechanism 16 and the circuit is broken when the end of the billet passes the cell A so that the number of impulses measured by the counter 16 is proportional to the length of the billet and hence to the finished length of the rolled strand. When the tip of the finished length passes the photo-electric cell B a circuit is completed, through a gate circuit T, between the impulse emitter 8 and a counting mechanism 14 which counts the impulses until the tip passes the cell C. The information from each counter is passed to a computer C which controls the shear 5 to cut the strand into cooling bed lengths which are each an integral multiple of the length X (a predetermined commercial length), and which are between the maximum and minimum lengths which can be handled by the cooling bed, and one further cooling bed length which is greater than an integral multiple of the length X by an amount less than the length X. In a modification (Fig. 2, not shown), the apparatus is arranged to measure the length of a bloom and hence calculate the finished length, and a computer controlling the shear cuts the finished strand into billets of equal length. Alternatively, the cutting programme may be arranged to trim the leading end of the strand so that the remainder may be cut into a number of billets of a predetermined length.
Patent GB-913858-A (GB)
Title: Improvements in or relating to ceramic fuel for nuclear reactors
Inventor: COPE LAWRENCE HENRY
IPC: G21C3/62
Filed: 1959-06-26
Abstract: 913,858. Nuclear fuel material. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Sept. 20, 1960 [June 26, 1959; Sept. 5, 1960], Nos. 21953/59 and 30617/60. Class 39 (4). Ceramic nuclear fuel is made by a method including the steps of mixing particles of a ceramic with gelatinous fissionable material and treating the mixture so that the fissionable material is adsorbed on the ceramic. In Example 1, UO 2.10  is milled with a colloidal suspension of plutonium hydroxide, dried in argon, mixed with a solution of polybutyl methacrylate, compacted under pressure, and sintered in argon to form an intimate mixture of plutonium and uranium oxides. In Example 2, natural UO 2  is milled with 2% by weight of gelatinous plutonium hydroxide, granulated by tumbling, pressed without drying into fuel compacts, and sintered. Specification 881,883 is referred to.
Patent GB-876703-A (GB)
Title: Machine tool slide mounting
IPC: B24B41/02
Filed: 1960-06-23
Abstract: 876,703. Grinding. CINCINNATI MILLING MACHINE CO. June 23, 1960 [Sept. 24, 1959], No. 21964/60. Class 60. A machine tool for centreless grinding comprises a grinding wheel 16, Fig. 1, mounted on a base 15, a guide member 20 angularly adjustable relative to the plane of the grinding wheel, and a workpiece supporting slide 70 mounted on the base and engaged with the guide member for movement along the base to position the workpiece relative to the grinding wheel. The slide 70 consists of an upper part 70b which carries a control wheel 98 and is movable by rotation of a lead screw 94 on a lower part 70a which carries a support 97 for the workpiece 99 and rests on a surface 18, Fig. 3, of the base 15. The upper and lower parts of the slides can be clamped together and moved as a unit for setting-up purposes by rotation of a handwheel 96 connected to a nut on the lead screw. The guide member 20 is disposed on the surface 18 and in a recess 22 and comprises two shoulders 60, 61 seating elongated strips 62, 63 having surfaces 64, 65 engaged by balls 67, in turn engaging a rib 72 secured to the lower part 70a of the slide to guide the slide on the base. The guide member, at one end 25a, Fig. 1, engages a pin 32 on the base, and, at the other end 25c, has a depending rib 21 engaged by bolts 45, 46, Fig. 5, having head 48, 49 whereby the guide member can be angularly adjusted about the pin 32 to enable cylindrical or tapered workpieces to be ground. The guide member can be clamped in position by rotation of a bolt 52 rocking a lever 51 about a fulcrum 59 to pull a bolt 56 engaging the guide member downwardly to clamp the guide member against the base, and the slide 70 can be secured to the guide member by a clamp 80, Fig. 3. Play between the balls 77 and guide surfaces on the rib 72 and strips 62, 63 is eliminated during assembly by leaving bolts 66 loose, inflating a tube 67 to press the balls, rib and strips together, and then tightening the bolts. Springs may replace the inflatable tube. A surface of the rib engaged by the balls may be inclined so that the rib is urged towards the base.
Patent GB-1289763-A (GB)
Title: photgraphic apparatus having a diaphragm and or shutter blade actuator frame
IPC: G03B9/07
Filed: 1970-05-07
Abstract: 1289763 Actuation of camera shutters and diaphragms CANON K K 7 May 1970 [10 May 1969] 22021/71 Heading G2A A shutter or diaphragm of the pre-setting type has a blade actuator frame 1 carrying at least three equally circumferentially spaced magnets and a stationary supporting member carrying electromagnetic coils 2 corresponding in number and spacing to the magnets, a switching circuit controlling the current supplied to the coils from a power supply. The coils are arranged in an angular direction, as shown, or in a radial direction, Fig.2 (not shown) or in an axial direction parallel to the optical axis of an objective, Fig.3 (not shown). A spring may bias frame 1 to a set position and thus return the frame thereto upon de-energization of the coils, or the switching circuit may simply reverse the direction of the applied current. A capacitor is included in the switching current to provide an initial operating pulse. A transistor circuit, Fig. 5 (not shown), may be used to reverse the current.