baber/WOPTO huggingface dataset:
Patent GB-549682-A (GB)
Title: Improvements in the production of water-soluble polymeric materials
IPC: C08F22/04
Filed: 1941-05-28
Abstract: 549,682. Water-soluble polymeric materials. DU PONT DE NEMOURS & CO., E. I. May 28, 1941, No. 6830. Convention date, June 1, 1940. [Class 2 (iii)] Water-soluble polymeric materials are obtained by interpolymerizing maleic anhydride with a polymerizable compound containing a single CH 2 =C<group in the presence of a non-reactive, water-immiscible solvent, and digesting the reaction mixture in an aqueous solution of a base until sufficient hydration and neutralization has been effected to cause it to go into solution, this aqueous solution then being separated from the solvent. Suitable polymerizable compounds are styrene, vinyl esters, ethers and halides, acrylic acid, its amide, esters and nitrile and methacrylo-nitrile. Specified solvents are xylene, toluene, benzene and ethylbenzene. Peroxidation inhibitors such as tert. butyl catechol, hydroquinone or sulphur may be added to prevent the formation of polymer e.g. polystyrene. Preferred bases are the carbonates and hydroxides of potassium and sodium. In an example, to a styrene-maleic anhydride interpolymer prepared by heating in xylene solution at 100‹C., water and caustic soda were added and the mixture digested for 3 hours. After standing 8 hours the mixture separated into two layers. The aqueous layer containing the interpolymer was separated and subjected to a further period of digestion with additional alkali, then dried to give a light solid consisting of the partial sodium salt of the hydrated interpolymer of styrene and maleic anhydride. The interpolymerization may be initiated by addition of a peroxide such as benzoyl, dibutyryl, lauroyl, acetyl or succinyl peroxide or ascaridole. The temperature of polymerization may be varied, the higher the temperature the higher the rate of polymerization and the lower the molecular weight of the interpolymers. Only sufficient alkali is preferably used in the digestion to effect solution of the interpolymer before separation of the solvent, after which it may be subjected to a further digestion with additional alkali to bring the final product in 25 per cent. aqueous solution to a pH of 4.8 to 5.7.
Patent GB-307081-A (GB)
Title: Improvements in and relating to electric resonant units
IPC: H03H5/00
Filed: 1929-03-02
Abstract: 307,081. British Thomson-Houston Co., Ltd., (Assignees of Billiard, L. H. van). March 2, 1928, [Convention date]. Condensers. -A resonant unit comprises inductance coils, one or more of which are wound with a capacitance relationship to the others, the capacitance windings having one terminal connected to the inductance and the other terminals left open. In one arrangement, Figs. 1, 2, two parallel windings are connected between terminals 14, - - 17 on an insulating core 10. One of the windings is broken at 18 and when the terminals 14, 15, are connected as well as those 16, 17 the circuit comprises an inductance 11 having capacitances 12, 13. In other arrangements, one parallel or series capacitance can be formed and a further winding may be inductively associated with the winding 11. The winding can be of the spider, honeycomb, pile or universal type and the capacitance section may be square or flat in shane. Reference has been directed by the Comptroller to Specification 266,428.
Patent GB-580981-A (GB)
Title: Improvements relating to fluid operated valves and to air compressors embodying same
IPC: F16K31/126
Filed: 1944-04-14
Abstract: 580,981. Fluid-pressure actuated valves. REAVELL & CO., Ltd., and MAYERS, T. T. April 14, 1944, No. 6912. [Class 135] . A valve for controlling the flow of cooling water to an air compressor so as to stop the flow when the compressor stops and to restore the flow on starting comprises a valve member m, controlling the flow from an inlet b to an outlet c, which is actuated by the air pressure on the bottom of a double diaphragm g, e. The water inlet pressure acts on the top of the diaphragm through a passage e<2> provided and the space between the two diaphragm members is vented to atmosphere through a passage f. In a compressor having a delivery type unloader and check valve the delivery line between the compressor and check valve is connected to the diaphragm chamber so that when compressor stops the pressure on the diaphragm is relieved and water valve closes. A small byepass passage t may be provided to keep a small amount of water circulating. In a compressor having a suction unloading device ' operated by an air relay a further piston valve x is provided which is acted upon by pressure from the said relay through a connection z when the unloading device is operated to move against a spring y to close a connection j<1> to the air receiver and open the diaphragm chamber to an exhaust passage 1.
Patent GB-1304445-A (GB)
IPC: D06F34/30
Filed: 1970-02-13
Abstract: 1304445 Time switches HOLZER PATENT AG 13 Feb 1970 [15 Feb 1969] 6994/70 Heading H1N A programme control mechanism wherein an indicator shows the sequential positions of programme cam means in driven engagement therewith is provided with a preselector knob for setting the starting position by engagement of first entrainment means thereon with second entrainment means associated with the indicator, whereby movement of the knob moves the indicator and cam means but movement of the cam means and indicator (by running of the mechanism) does not move the knob. Thus, while the programme stages in operation are being indicated the knob maintains an indication of the preselected start position. As shown, a cam disc 4 loose on a spindle 6 is driven by a gear-wheel or feed pawl 12 and is rigidly coupled to a disc 2 carrying a mark 7 visible through an annular window in cover-plate 3 to indicate the programme stage attained. A preselector knob 1 carried on spindle 6 has a peg 8 which abuts a lug 9 on disc 2 when the pointer nose 11 and indicator mark 7 are in alignment. Locating means 10 maintain knob 1 is its preselected position and do not have to be overcome by the motor driving cam disc 4. Additional switching functions may be performed by axial displacement of the shaft 6 or by attaching a rotary selector switch thereto.
Patent GB-1268981-A (GB)
Title: Seed tape manufacture
Inventor: CRAIG BURNIE MCDONALD
IPC: A01C7/04
Filed: 1970-02-13
Abstract: 1,268,981. Packaging seeds. UNION CARBIDE CORP. 13 Feb., 1970, No. 7000/70. Heading B8C. In the manufacture of seed tape, seed pick-up nozzles 75 mounted on an assembly 35 are rotated in an inclined plane to pick up seeds from a rotating annular seed tray 40 and to release the seeds above a continuously moving tape 20. The nozzles and the tray rotate in the same direction to avoid disturbance of the seed bed 24 at pick up, and the tape and nozzles move in the same direction at the release point 23 to promote accurate placing of the seeds on the tape. As each nozzle 75 moves through the bed 24, a passage 72 communicating with the nozzle moves into registry with an evacuated arcuate groove, Fig. 5 (not shown), formed on the lower face of a stationary plate 50 so that seed is picked up by the nozzle and lifted out of the bed. Each nozzle has a number of openings corresponding to the number of seeds to be picked up. After moving out of registry with the groove, the passage 72 communicates through a passage 60 with atmosphere, or with a source of pressure slightly above atmosphere, so that the seeds are released when they are above the tape 20. Thereafter, the passage 72 is brought into communication, through a further passage in the plate 50, with a source of compressed air to clear the nozzle. The seed bed is protected from the resultant air jets by a plate 71 (Fig. 1). While rising from the bed 24, the nozzles are cleared of any excess seeds by a compressed air nozzle 96. The surface of the seed bed is maintained level by a freely pivoted plate 104 which also acts through a micro-switch 106 to control the supply of seed to the bed from a reservoir 100 through a vibratory trough 101. A tape drive and sealing roller 21, the tray 40, and the nozzle assembly 35 are driven by the same motor 27 to ensure synchronization of their movement. A variable speed transmission 32 allows the seed spacing on the tape to be varied by adjustment of the speed of the nozzles relative to the tape, and a further variable speed transmission 38 allows adjustment of the speed of the nozzles relative to the seed bed. The tape is made of watersoluble polyethylene oxide and, prior to movement through a trough-shaped former 86, is slightly moistened by a spray 90. The spray moistens less than half the width of the tape so that seed deposited in the centre of the tape remains dry.
Patent GB-824940-A (GB)
Title: Bearings and bearing materials
Inventor: MITCHELL DAVID CONRAD
IPC: C25D7/10
Filed: 1956-03-07
Abstract: A bearing comprises a porous metal matrix impregnated with P.T.F.E. having a bearing surface consisting in part of P.T.F.E. and the matrix metal and in part of an additional metal consisting of lead, indium, thallium, cadmium or a combination of two or more of such metals.  The additional metal forms from 0.01% to 30% of the P.T.F.E. by volume and from 0.01% to 30% of the total bearing surface area.  A method of producing a bearing material in strip form comprises indenting by rolling, to a depth of 0.002 inches, a strip of steel-backed porous bronze impregnated with P.T.F.E.  The whole strip is then immersed in a bath of molten lead at 380 DEG C. and on removal from the bath it is rapidly wiped with an asbestos cloth to remove the surplus lead.  Alternatively, a series of grooves or drilled holes may be provided in the surface.  In another embodiment the additional metal is applied by spraying.
Patent GB-429391-A (GB)
Title: Improvements in electric devices having sealed envelopes and electrodes part or all of which consists of wire of tungsten or like metal
IPC: H01J19/50
Filed: 1934-03-06
Abstract: 429,391. Discharge lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, and CHELIOTI, G., Osram-G.E.C. Lamp Works, Brook Green, Hammersmith, both in London. March 6, 1934, No. 7130. [Class 39 (i)] [See also Group XXXVI] Wires or rods of tungsten &c., forming the electrodes and lead-in wires of electric discharge tubes such as those described in Specifications 405,605 and 419,955, which are not easily welded, are connected together by being inserted into a preformed helix which may be of the same metal. The wires 7, 3 may all be inserted from the same end of the helix 9, in which case they may be bent at right angles, as shown, or from opposite ends, in which case they may or may not overlap. The projecting ends 10 of the wires may be welded or nickelsoldered together and to the helix, the wires not being damaged by a weld at that point. If the helix is of flattened form it provides a resilient grip on the wires. Specifications 19096/92 and 14917/01, [both in Class 38], are referred to.
Patent GB-618871-A (GB)
Title: Non-sinsusoidal electron discharge valve amplifiers
IPC: H03K12/00
Filed: 1946-03-07
Abstract: 618,871. Pulse and sawtooth circuits. COSSOR, Ltd., A. C., WILLIAMS B. C. FLEMING-, and WYNN, A. H. A. March 7, 1946, No. 7135. [Class 40 (vi)] An amplifier for non-sinusoidal voltages employs a lumped impedance delay line LDL, shorted at both ends, as the anode load of a valve. One element Z may be the deflection coils of a cathode-ray tube, a sawtooth current, being generated in the coils in response to short voltage pulses applied to the valve. The valve may be tapped into a different point of the delay line to give a transformer action. The amplifier output may feed a second valve, Fig. 2 (not shown), coupled back to the first valve to form a multivibrator circuit,
Patent GB-860436-A (GB)
Title: Shaped linear copolymers
IPC: C08F210/00
Filed: 1957-03-04
Abstract: Shaped structures are made of a copolymer containing 90 to 60% of ethylene and 10 to 40% of propylene which copolymer has been produced by the low pressure process using as catalyst an organo-aluminium compound and a salt of a metal of Group IVa, Va or VIa.  The structures specified are tubes, pipes, sheet, dishes, angle bars and solid cylinders.  Specifications 786,014, 799,392, 799,823, 810,023 and 810,024 are referred to.
Patent GB-661232-A (GB)
Title: A tool holder for planing machines
IPC: B23D13/00
Filed: 1949-03-16
Abstract: 661,232. Planing. SOC. ANON. DES ANCIENS ETABLISSEMENTS C. BERTHIEZ. March 16, 1949 [April 22, 1948], No. 7153/49. Class 83 (iii). A planing tool box comprises a holder 2 which has recesses 11 for a number of tools 9, 10 and is mounted for adjustment round a spindle 7 on a slide 1 on the reciprocating machine head by means of two locking collars 3, 5 interengaged by radial teeth 20 and keyed to a lug 2b, on the holder 2 and to a lug 1b on the slide 1. The teeth 20 are 180 in number and surfaces at any angle to the horizontal up to 90 degrees may be planed by adjustment round the spindle, the collars being locked together by a single lock-nut 8. The inclined roughing tools 9 are fitted in staggered relationship in the recesses 11 and are adjusted axially by screws 12. As arranged for working in both directions, three of the tools 9 cut sawtooth ridges to the same depth d on the forward stroke and, on the return stroke, after the box has pivoted about the axis o and has been fed laterally by the distance w, the other three tools cut similar ridges and the single finishing tool 10 removes the previous ridges, the width of the finishing tool being sufficient to effect this during a single stroke. The tools may be sharpened at both ends so that they may be turned end-for-end for further use.
Patent GB-790091-A (GB)
Title: Improvements in or relating to rim brakes for cycles
Inventor: BOULSTRIDGE THOMAS JAMES
IPC: B62L1/00
Filed: 1956-03-07
Abstract: 790,091. Cycle brakes. PHILLIPS & CO., Ltd., J. A. March 7, 1956, No. 7157/56. Class 136(1) In a cycle rim brake in which the holders 5 for the brake blocks 6 have integral extensions 11 forming stabilizers for engaging the adjacent fork blades 12, the extensions pass outside the fork blades and their extremities 13 are turned inwardly to lie behind the fork blades.
Patent GB-1370868-A (GB)
Title: Seal system
IPC: F16J15/40
Filed: 1973-02-14
Abstract: 1370868 Shaft seals GULF OIL CORP 14 Feb 1973 [17 March 1972] 7229/73 Heading F2B  Sealing means for a vertical shaft 11 where it extends between a liquid region 12 and a gas region 13 comprises a seal housing 14 defining an annular land 15, an annular labyrinth 16 axially spaced from the land, an annular recess 22 intermediate the ends of the labyrinth, and a fluid collection cavity 17 communicating with the space between the land and the shaft and the space between the labyrinth and the shaft, means for supplying the liquid to the space between the land 15 and the shaft, means for supplying the gas to the annular recess 22, and liquid jet pump means 20 for removing fluid from the cavity 17. In the embodiment shown for the drive shaft 11 of a helium circulator for a gas cooled nuclear reactor, water and helium are present in the regions 12 and 13 respectively. Water under pressure is supplied from the bearing lubricating system 33 of a steam turbine (not shown) driving the shaft 11 to the space between the land 15 and the shaft and helium is supplied through a passage 23 to the annular recess 22 so that it flows in each direction along the labyrinth 16. The mixture of helium and water collecting in the cavity 17 is discharged therefrom by the jet pump 20 comprising a nozzle 25 and passages 27, 28 and operating to maintain a constant water level 24 determined by the location of the opening of the passage 27. The helium and water mixture is discharged through a pipe 29 to a separator 30 from which the water is returned to the bearing lubricating system 33 and the helium is returned via a gas dryer and purifier to the gas pump 34 supplying helium to the passage 23. The separator 30 and the cavity 17 are interconnected by a pressure equalizing pipe 31. The nozzle 25 is supplied with water from the system 33. Radical vanes 37 on the shaft prevent liquid flowing through the labyrinth if the cavity 17 becomes flooded with liquid.
Patent GB-496174-A (GB)
Title: Improvements in and relating to electrical insulating materials
IPC: H01B3/44
Filed: 1938-03-08
Abstract: Stabilized plasticized polyvinyl halides suitable for use as electrical insulating material comprise plasticized polyvinyl halide and up to about 4 per cent of lead resinate with or without the addition of an oxide of lead and an adsorbing agent such as fuller's earth or carbon black.  A suitable plasticized polyvinyl halide comprises polyvinyl chloride plasticized with tricresyl phosphate. Specification 450,856 and 470,380 are referred to.
Patent GB-674106-A (GB)
Title: Forage loader
IPC: A01D87/10
Filed: 1950-03-23
Abstract: 674,106. Pneumatic conveyers. THWAITES, L. B. Sept. 11, 1950. [March 23, 1950] No. 7268/50. Class 78 (i). [Also in Group I] A crop loader comprises a spiked pick-up roller 20 which passes the crop between a pair of rollers 27, 28, to a rotary cutting-cylinder 38 mounted at the lower end of the inlet casing 41 of a pneumatic conveyer driven by a fan 42, the fan having a tangential outlet 44 terminating in an adjustable discharge passage 45 fitted with means for deflecting the discharged crop in various directions. The pick-up roller includes pivoted tines 22 withdrawable into a casing 23 during rotation. The lower feed roller-27 is smooth-but the upper roller 28 carries serrated ribs 32. The cutting-cylinder 38 comprises helical blades co-acting with a fixed ledger blade 37. The fan casing 41 tapers upwardly and includes an air inlet 43 which assists the upward, motion of the dropped crop. The discharge passage 45 is rotably mounted on the end 46 of the outlet 44 of the fan and carries an adjustable baffle at its rear end ror regulating the distribution of the crop over the floor of a towed trailer (not shown). The machine is supported on height-adjustable wheels and may be towed by a tractor.
Patent GB-881519-A (GB)
Title: Process and apparatus for refining crude benzene
IPC: C07C7/163
Filed: 1958-03-06
Abstract: In the catalytic hydrofining of benzene by the process of Specification 844,380, in which benzene is purified in the vapour phase by contact with a hydrofining catalyst and a hydrogen-containing gas which is recycled, and to which is added fresh hydrogen-containing gas in the form of a gas also containing carbon monoxide and saturated with steam and in which the fresh gas in introduced into hydrofining reactor into a zone having a higher carbon monoxide and steam concentration as compared to the remainder of the reactor whereby carbon monoxide is catalytically converted to carbon dioxide and hydrogen by reaction with steam before being mixed with the circulating gas, carbon dioxide is removed from the recycle gas at reaction pressure but below 100 DEG C., preferably by washing with water or aqueous alkali carbonate at 70 DEG C.-90 DEG C.
Patent GB-638994-A (GB)
Title: An improved electrical meter for measuring wattless energy
IPC: G01R11/52
Filed: 1947-03-17
Abstract: 638,994. Supply meters. LANDIS & GYR SOC. ANON. March 17, 1947, No. 7382. Convention date, March 18, 1946. [Class 37] The invention introduces a device which measures wattless energy or reactive k.V.A.h. when the power factor of the connected load is less than a selected value, for example d, Fig. 1. The graphs shown in Fig. 1 assume constant k.V.A. and curve 2 shows the speed change of a reactive k.V.A.h. meter with change in power factor from 1 to zero and the straight line 3 illustrates that the speed of a k.V.A.h. meter is constant under the same conditions. In Fig. 2 the sun-wheel at 5 of a k.V.A.h. meter 30 runs at a constant speed which is not proportional to true k.V.A.h.-straight line 3- but to k.V.A.h. multiplied by the sine of the angle corresponding to the power factor d. This speed is shown in Fig. 1 by the straight line 31 and the decrease from line 3 is effected by reduction gearing 4. The sun-wheel at 5 of the reactive k.V.A.h. meter 20 turns at a speed depending on the power factor from d to zero. The two sun-wheels rotate at the same speed when the power factor is d. The planet-wheel at 5 only moves when the power factor falls below d, thus its speed is proportional to the difference between speed 31 and speed 2, for example, if the power factor is c then speed a b, Fig. 1, is transmitted to reactive k.V.A.h. counter 7. If it is required that the power factor which controls the k.V.A. reactive hours registered in Fig. 2 should be some other value than d, the change is made by altering the reduction gearing 4. A one-way clutch or pawl (not shown) is in practice included so that the counter 7 should not reverse when the power factor goes about d or whatever other value is chosen. In a modification, Fig. 3 (not shown), a k.V.A.h. meter with a restricted power factor range, for example 0.35 to 0.85, is utilized.
Patent GB-1353118-A (GB)
Title: Device for grinding or polishing surfaces
IPC: B24B21/08
Filed: 1972-02-17
Abstract: 1353118 Grinding AUTOMOBILOVE ZAVODY NARODNI PODNIK 17 Feb 1972 [18 Feb 1971] 7424/72 Heading B3D A device for grinding or polishing surfaces comprises a flexible backing plate 1 for holding an abrasive belt or sheet 21 against a curved surface to be ground or polished, and means to twist the plate to a curvature corresponding to that of the surface to be ground or polished to give the abrasive belt or sheet a similar curvature. The plate 1 is secured to supports 15 which are pivotally mounted on pins 18 at the ends of a support body 16 having a flange 19 for connection to a drive mechanism for the device. The axis of the pins may lie along a diagonal of the plate 1 or at an angle # to the diagonal or be parallel to one another; the pins also incline downwardly at an angle α to the plate. Air or hydraulic cylinders 17 or springs act to tilt the supports relative to the body to twist the plate so that its curvature corresponds to that of the workpiece. Magnets 14 on the plate act to press the abrasive sheet 21 against the workpiece. In another embodiment, one of the supports 15 is fixed and the other is pivotable on the body.
Patent GB-720823-A (GB)
Title: Improvements in or relating to spanners
IPC: B25B13/08
Filed: 1953-03-18
Abstract: 720,823. Spanners. DIEBOLD, F. March 18, 1953 [March 31, 1952], No. 7459/53. Class 61. In an open jaw spanner, the' jaws 1 and 2 comprise rounded bosses 3, 4 which prevent the spanner when forcibly operated from sliding over the corners of the part to be turned. The outer part 8 of each boss which is adapted to apply a thrust on one face of the nut 7, has a radius of curvature greater than that of the inner part 9 of each boss which is adapted to apply a pull to the opposite face of the nut. The recess between the two jaws is provided with bosses 5 for contacting the nut, the distance separating the bosses from the centre of a line between the grip portions being greater than half the distance between the grip portions. The jaws are somewhat elastic so that when the spanner is under stress the shortest distance between opposite grip portions of the jaws is along a line which passes substantially through the centre of the nut. Spanners having adjustable jaws may be similarly constructed.
Patent GB-119831-A (GB)
Title: Improvements in or relating to Boxes for Holding Cigarettes or Cigars.
Inventor: SMITH GABRIEL
IPC: B65D85/10
Filed: 1918-05-06
Abstract: 119,831. Smith, G. May 6, 1918. Drawer - and - shell boxes; matches, boxes specially designed for; match-striking surfaces.- The drawer b of a drawer-and-shell box for holding cigars cr cigarettes is provided with a cover flap, which is hinged to the drawer at d and is slit into strips at its free end so as to constitute a row e of matches. A match-striking surface f is provided on the lower portion of the cover flap. The drawer b may be open at the top or may have a hinged lid g.