baber/WOPTO huggingface dataset:
Patent GB-796530-A (GB)
Title: Production of solid polymers
IPC: C08F10/00
Filed: 1956-06-20
Abstract: A catalyst for the polymerization of hydrocarbons comprises (A) a hydrocarbon derivative, containing no more than 48 carbon atoms, of titanium, zirconium, hafnium, thorium, lead, or germanium and (B) a halide of titanium, zirconium or hafnium or a complex salt thereof with a halide of the alkali metals or ammonia.  A halide of aluminium, gallium, indium or thallium may also be present. Specified hydrocarbon derivatives are tetra-ethyl lead, tetraphenyl lead, tetra-n-propyl lead, tetrabenzyl lead, tetra(2-cyclohexenyl)titanium, tetraoctyltitanium, tetra - sec. - hexyltitanium, tetrabutenyltitanium, tetracyclohexylzirconium, tetra(3-methylcyclohexyl)zirconium, tetra(2-phenylethyl)zirconium, diethyldimethylhafnium, tetraethylthorium, tetra - t - butylthorium, tetratolylgermanium, and tetra(2-ethylcyclohexyl)germanium. Specified halides are titanium tetrachloride, tetrabromide, trichloride, tribromide and trifluoride, zirconium tetrachloride and tetrabromide and hafnium tetrachloride and tetrabromide, while complex halides are potassium fluorotitanate, fluorozirconate, chlorozirconate and fluorhafniate, lithium fluotitanate, caesium fluorzirconate, ammonium chlorotitanate and rubidium bromotitanate.ALSO:Hydrocarbons are polymerized in the presence of a catalyst comprising (A) a hydrocarbon derivative containing no more than 48 carbon atoms, of titanium, zirconium, hafnium, thorium, lead or germanium, and (B) a halide of titanium, zirconium or hafnium or a complex salt thereof with a halide of an alkali metal or ammonia. A halide of aluminium, gallium, indium or thallium may also be present. Specified hydrocarbon derivatives are tetraethyl - lead, tetraphenyl - lead, tetra - n - propyl-lead, tetrabenzyl-lead, tetra-(2-cyclohexenyl) titanium, tetraoctyltitanium, tetra-sec.-hexyl-titanium, tetrabutenyltitanium, tetracyclohexylzirconium, tetra - (3 - methylcyclohexyl) zirconium, tetra - (2 - phenylethyl) - zirconium, diethyldimethylhafnium, tetraethylthorium, tetra-t-butylthorium, tetratolylgermanium, and tetra-(2-ethylcyclohexyl) germanium.  Specified halides are titanium tetrachloride, tetrabromide, trichloride, tribromide, and trifluoride, zirconium tetrachloride, and tetrabromide, and hafnium tetrachloride and tetrabromide while complex halides are potassium fluotitanate, fluorozirconate, chlorozirconate, and fluohafniate, lithium fluotitanate, caesium fluorzirconate, ammonium chlorotitanate and rubidium bromotitanate.  Specified hydrocarbons are ethylene, propylene, 1-butene, 1-hexene, 1-octene, isobutylene, 1,1- and 1,2-dialkyl substituted ethylene, 1,5-hexadiene, 1,4-pentadiene, 1,4,7-octatriene, cyclohexene, styrene, and alkyl-substituted styrenes.  Mixtures of ethylene with propylene or 1-butene and of propylene with 1-butene or pentene may be used.  The reaction may take place in the gaseous phase, preferably in the presence of an inert, organic diluent, e.g. propane, butane, pentane, iso-octane, cyclohexane, methylcyclohexane, benzene, toluene, and halogenated hydrocarbons.  The process may be carried out continuously or batchwise.
Patent GB-1149324-A (GB)
Title: Sanitary napkin
IPC: A61F13/56
Filed: 1967-04-26
Abstract: 1,149,324. Sanitary napkins. PROCTER & GAMBLE CO. 26 April, 1967 [27 April, 1966], No. 19276/67. Heading A5R. A sanitary napkin comprises a preformed unitary absorptive core 11 the upper and lower surfaces of said core being arcuately preformed and being upwardly concave in both the direction of the length of the core and transverse thereto, and having a central longitudinal depression 16 in the upper surface of the core. The upwardly concave configuration in a lateral direction may be imperceptible. The longitudinal depression comprises a single longitudinal groove, a pair of longitudinal grooves or short aligned grooves and is spaced from the ends of the pad. The pad is faced on the lower surface and edges by a moisture impermeable polyethylene film 12 and is wrapped in a rayon, cotton or synthetic fibre fleece 13 and an outer gauze or knitted scrim cover 14 which forms end tabs 14a, 14b. A number of cores 11 are formed by cutting transversely an elongated bat (23, Fig. 6) of uniform concave-convex cross-section. The bat is formed in a mould (21, Fig. 4) from wood fibres, cotton linters or rayon flock, which is mixed with a foaming agent and dried after moulding leaving the fibres in the distended condition produced by the foam bubbles. Alternatively, the bat is formed from bonded air-laid felt. The central groove or grooves are formed by a rib (28, Fig. 7) on the male portion of a two part mould in which the core is subjected to pressure.
Patent GB-724624-A (GB)
Title: Improvements relating to stereoscopic range finders
IPC: G03B35/08
Filed: 1953-07-11
Abstract: 724,624. Stereoscopic range-finder. KOLB, O. K. (Lang, H. de). July 11, 1963, No. 19296/53. Class 97 (1) A stereoscopic range finder comprises two concave mirrors Ll and L2 having semitransparent reflecting surfaces 2 and set with their axes parallel at the interpupillar distance, and two reference marks M1 and M2, conveniently in the form of transparent arrowheads on an opaque ground, mounted on T- pieces 3, 4 which are pivoted at PI, P2. The reference marks are initially at the foci F1 F2 of the mirrors, but by means of the adjusting screw 11, or similar mechanism, such as a cam, the T-pieces are caused to pivot and the marks describe symmetrical paths F1, V1 and F2, V2. The observer looks directly at the scene through the eyepieces 13, 14 and the semi-transparent mirrors, and he will also see, when the marks are at their respective foci, two virtual images of the marks at infinity. The observer fixes his eyes on the object whose distance is to be measured and adjusts the control knob 11 until the virtual images not only merge together but also appear to coincide with the object under observation. The adjustment mechanism is calibrated to show the correct distance of the object. The control knob may be coupled to the focusing means of a photographic or television camera lens.
Patent GB-582964-A (GB)
Title: An improvement in or relating to liquid flow meters
IPC: G01F1/10
Filed: 1944-10-09
Abstract: 582,964. Rotary meters. GRAUCOB, Ltd., F., and TEATHER, H. G. Oct. 9, 1944, No. 19298. [Class 110 (ii)] [Also in Group XIX] In a liquid flow meter of the type in which a vaned member f rotated by the liquid is geared to external counting mechanism, the latter is housed in a turret p rotatably mounted on a plate c forming a closure to an opening in the pipe line through which the meter is introduced into the liquid stream. The turret is mounted directly on a disc o held to the plate c by a keep ring n. The vaned member is geared to a spindle s having the same axis of rotation as the turret and carrying a gear u meshing with a gear v driving the counting mechanism. The turret and counting mechanism may be rotated to any convenient position for viewing the dials through windows provided in the turret. The spindle s passes through glands s<1> and s<2>.
Patent GB-681171-A (GB)
Title: Improvements relating to the manufacture of staple yarn from continuous filaments
IPC: D01G1/08
Filed: 1949-07-22
Abstract: 681,171. Converting continuous filaments into staple fibre yarns. DU PONT DE NEMOURS & CO., E. I. July 22, 1949 [Aug. 4, 1948], No. 19314/49. Classes 120(ii) and 120(iii) In the direct conversion of a continuous filament tow to a staple yarn by employing two sets of rolls rotating at different speeds, the majority of filaments are caused to break close to the back rolls by bending the tow abruptly by a single supporting and advancing member that engages the tow at a point closely adjacent the back rolls, the supporting and advancing member being driven at a surface speed at least 0.3 times that of the front rolls. In a preferred device, a belt 6 is located between the rolls 3, 4 and 8, 9, so that filaments passing from the roll 3 are bent sharply about a roll 11 upon making contact with the belt 6. The angle of bend of the filaments may be varied and is partially dependent upon the co-efficient of friction between the tow and the contacting surface, which is desirably between 0.15 to 0.50. Angles of berid may range from 15 degrees to more than 130 degrees. Instead of the belt 6, a small roll, say of one-inch diameter, may be used and, if desired, a supporting belt, tube, or trumpet may follow the small roller. Specifications 542,235 and 582,949 are referred to.
Patent GB-184978-A (GB)
Title: Improvements relating to electric traction
IPC: B60L15/20
Filed: 1921-07-18
Abstract: 184,978. Brooks, R., and Metropolitan- Vickers Electrical Co., Ltd. July 18, 1921. Running on alternative supply circuits; safety arrangements.-In motor control systems for traction and other purposes, a main circuit change-over switch for making connection alternatively to two sources of supply is interlocked with a motor controller, which must be in position to disconnect the motors &c. before the change-over switch can be moved. The interlock is effected by a notched semicircular plate 6 attached to the spindle 2 of the change-over switch 1 and a half-round extension 15 of the spindle of the motor controller 12. The halfround spindle projects into one of the notches 9 until the controller 12 is moved to disconnect the motors. The handle 14 of the controller is normally removable, but is locked against removal by a second notched plate 17 until the circuit changing switch is turned to an extreme position in which both sources of supply are cutoff. When the handle is freed it can be used to unlock a high-tension compartment, safety being ensured by the previous cut-off. Auxiliary switches 24 open and close the circuit of electromagnets controlling the lowering of a trolly collector.
Patent GB-625263-A (GB)
Title: Improved electric discharge tube containing a secondary-emission electrode
IPC: H01J43/28
Filed: 1946-06-28
Abstract: 625,263. Electron multipliers. PHILIPS LAMPS, Ltd. June 28, 1946, No. 19378. Convention date, May 16, 1942. [Class 39 (i)] In an electric discharge tube comprising a cathode, a control electrode, an anode and at least one secondary emission electrode which is coated with one or more alkali metal compounds, the amount of free alkali metal on the secondary electrode is kept constant at an optimum value for secondary emission, by including in the discharge tube a suitable quantity of a substance which at the temperature occuring in the tube under operating conditions, is capable of maintaining constant the vapour pressure in the tube and hence the amount of free metal on the secondary electrode. The substance may comprise active carbon, tin or lead and the quantity suitable is found empirically. The substance is preferably on or close to the secondary electrode. The size, nature and location of the secondary electrodes in a tube having several such electrodes subjected to different loads, are so chosen that they all acquire the same temperature, notwithstanding the different loads, for example, by properly dimensioning the electrodes and adding cooling fins if necessary. In an example given, the secondary electrode consists of a copper strip oxidised in air and after mounting in the tube the electrode is completed by providing a mixture of one part caesium chromate and four parts zirconium metal. From this mixture caesium is set free by heating. The substance controlling the amount of free caesium is provided by coating a metal member with active carbon precipitated from a colloidal solution. The tube is operated for one hour and then further heated for one hour in a furnace at a temperature of 160‹ C. without a voltage being impressed on the tube, metallic caesium, caesium oxide and possibly caesium suboxide being formed. Specification 517,643 is referred to.
Patent GB-767985-A (GB)
Title: Improvements in photomechanical processes and materials therefor
Inventor: HEPHER MARTIN
IPC: G03C8/08
Filed: 1954-07-02
Abstract: 767,985. Light-sensitive coating composition for photomechanical procedure. KODAK, Ltd. July 1, 1955 [July 2, 1954], No. 19483/54. Class 98(2) For making an image suitable as etching resist or as the ink-accepting portion of a lithographic plate, the composition comprises an organic solvent soluble colloid sensitized with a water-insoluble aryl azide compound; and this may be coated on to a support as of metal, glass, film, paper carrying a hydrophilic layer or surface hydrolyzed cellulose ester sheet, imagewise exposed as usual and treated with a solvent to remove unexposed areas and leave the image. In Example 1 smoked rubber sensitized with 4, 4' - diazidostilbene in warm trichloroethylene is coated on to a copper sheet by pouring, or by whirling when toluene is included in the solvent, dried, exposed in contact with a line or halftone transparency to mercury vapour illumination and agitated in trichloroethylene to produce the image. In Exampdes 2-5 the rubber is replaced respectively by butadiene-acrylonitrile copolymer, butadiene - styrene copolymer, cyclicized rubber, and cyclicized rubber mixed with chlorinated rubber. Example 6 specifies 4, 4' - diazidobenzophenone as sensitizer. Examples 7 - 9 quote a condensation product of epichlorohydrin and diphenylolpropane, bitumen, and a condensation product of epichlorohydrin and bisphenol, as colloids with use of certain other solvents; and in Example 10 cyclicized rubber is used with 4, 4' - diazidodiphenylmethane as sensitizer. Specifications 533,630, 537,146 [both Group V] and 579.698 [Group IV] are referred to.
Patent GB-693980-A (GB)
Title: Process for preparing linear polyethers
Inventor: REEDER FRANK
IPC: C08G65/40
Filed: 1950-08-04
Abstract: Linear polyethers having a recurrent unit [Ar-O-R-O], where Ar is an arylene group and R is a divalent linkage group, are made by reacting substantially equimolecular proportions of a dihydric phenol and a disulphonic ester of a diol in presence of an alkali the molecular proportion of which is at least twice the molecular proportion of the disulphonic ester.  Specified dihydric phenols are resorcinol, hydroquinone and 3,31- or 4, 41-dihydroxydiphenyl.  Specified disulphonic esters are the di-paratoluene sulphonates of ethylene glycol; 1 : 4-bis - (beta - hydroxyethoxy) - benzene; propane - 1,3 - diol; butane - 1,4 - diol; pentane-1,5 - diol; hexane - 1,6 - diol; decane - 1,10-diol; and diethylene glycol.  Reaction may be performed in presence of a mixture of dioxane and water.  The polymers may be purified by washing with boiling water and boiling hydrochloric acid. They are soluble in meta-cresol and nitrobenzene.  Examples are given.  Specification 433,452 is referred to.
Patent GB-673314-A (GB)
Title: Improvements in circuit-arrangements for frequency transformation of high frequency oscillations
IPC: H03D7/10
Filed: 1950-08-04
Abstract: 673,314. Thermionic valves. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 4, 1950 [Aug. 9, 1949], No. 19529/50. Class 39 (i). [Also in Group XL (c)] A valve used in a frequency-changing circuit for short waves (see Group XL (c)) comprises a directly - heated cathode emitting electrons mainly in directions perpendicular to the plane in which it is located, an inner grid 5 and an electrode 3 comprising two B-shaped plates, serving with the grid 5 as oscillator electrodes. A pair of rod electrodes 12 are connected within the tube to the grid 5, and are surrounded by a signal-input grid 4. Further electrodes comprise a screen-grid 6 and anode 7 with, interposed, a suppresser-grid which is connected internally to the cathode. Specification 623,162, [Group XL (c)], is referred to.
Patent GB-201917-A (GB)
Title: Improvements in or relating to tipping wagons
IPC: B60P1/24
Filed: 1923-07-31
Abstract: 201,917. Griscom-Russell Co., (Assignees of Dewald, E. A.) Aug. 1, 1922, [Convention date]. Sliding bolts; catches, automatic ; latches, sliding.-In tipping-wagons means are provided for locking the body in horizontal position and for operating the latch of the tail gate. The body locking means consists of a spring-pressed pin 13 engaging the body 5 and adapted to Le retracted by a lever 18 co-operating with cam surfaces on a cam plate 19. The cam surfaces are such that a movement in either direction of the lever 18 will withdraw the pin, but one cam surface is provided with a notch 22, Fig. 4, to hold the pin retracted. The tail gate is provided at the bottom with a spring latch 32 which as tipping proceeds is released by means of a chain 34 co-operating with a cross-bar 35 and is reengaged automatically on return of the body to horizontal position.
Patent GB-1039360-A (GB)
Title: Facsimile automatic contrast control
IPC: H04N1/407
Filed: 1963-05-17
Abstract: 1,039,360. Facsimile systems. HOGAN FAXIMILE CORPORATION. May 17, 1963 [May 31, 1962], No. 19614/63. Heading H4F. In a pictorial communication system in which a document 1 is scanned by an arrangement including a photo-multiplier 10 compensation for variations in the document background density is effected by an automatic-gain-control circuit which varies the supply voltage for the photo-multiplier. The output signal from the photo-multiplier is applied through an emitterfollower stage 15, 16 to a peak detector 24, 25, 26 to derive a potential which is applied through amplifier 30 to control the base potential of transistor 41. This transistor also receives an alternating signal from terminal 50 and conducts to pass the peaks of the signal to an extent determined by the potential applied from amplifier 30. The collector output pulses are stepped up in voltage in transformer 60 and rectified in circuit 70, 71 to produce a potential which is added in series in the connection from the photo-multiplier supply circuit 65, 66, 67, 72. The system functions so that, in response to an increase in background density (i.e. the document background is other than perfectly white), the photo-multipler sensitivity is increased so as to increase the overall signal excursion and maintain picture contrast. In a modification, peak detector 24, 25, 26 is converted to an averaging circuit by replacing the diode by a resistor (as shown dotted).
Patent GB-1218213-A (GB)
Title: Improvements in rheostats
Inventor: BONO DAVID
IPC: H01C10/02
Filed: 1968-04-25
Abstract: 1,218,213. Liquid resistors. ASSOCIATION DES OUVRIERS EN INSTRUMENTS DE PRECISION. 25 April, 1968 [6 Oct., 1967], No. 19639/68. Heading H1S. A tank 1 contains a pair of electrodes E positioned opposite each other by partitions 4 carrying a floor 7 a short way beneath portions 3 of the electrodes E deeply immersed in liquid having their major dimension parallel to the surface N of the liquid. Portions 3b, 3d are sheathed in insulating material 22, and the depths of the bare portions 3c in the liquid, an alkaline electrolyte, carbonate, borate, or benzoate or caustic soda, is from 4 to 10 times their height. The electrodes, the floor 7 and its rib 7a are accommodated in the panels 4 by slots 5, 6, 6a having reinforcing thickenings 10, their positions being determined by notches 12 in the floor 7 and vertical holes in the thickneings 10 through which locking bars 17 extend to stops 19. Terminals 3a are provided in the cover 2 of the tank 1.
Patent GB-498849-A (GB)
Title: Improvements in castors for furniture and the like
IPC: A47B91/06
Filed: 1937-07-16
Abstract: 498,849. Ferrules. BYSON APPLIANCE CO., Ltd., and HARRISON, E. July 16, 1937, No. 19702. [Class 134] A castor comprises a convex floor - engaging body member of synthetic resin mounted for movement on its vertical axis on a pin enclosed within the article supported by the castor, the periphery of the body being rounded off to a smaller radius than that of the floorengaging part. In the form shown, the floorengaging member a is of moulded synthetic resin rigidly secured to a pivot pin c sprung into a sleeve f having a slotted tapering end and secured to the piece of furniture. A second moulded member b is mounted loosely on the pin c. In a modification, the pin carries the moulded convex floor-engaging member only.
Patent GB-516650-A (GB)
Title: Improvements in or relating to the corrugating and trimming of sheets of asbestos cement or the like when in plastic condition
IPC: B28B1/52
Filed: 1938-07-04
Abstract: 516,650. Corrugating and trimming asbestos sheets &c. MAGNANI, A. July 4, 1938, No. 19749. Convention date, Aug. 5, 1937. [Class 87 (ii)] Asbestos-cement and like sheets L in the plastic condition are corrugated by placing them on a moulding- table M beneath a moulding-member having bars or rollers la, 6a that can be raised or lowered independently. The rollers between the centre and edges of the sheet are lowered and then raised. The central roller or rollers are then lowered, whereupon the rollers which were first lowered are again lowered, followed by the rollers nearer the edges successively to the outermost rollers. The edges of the sheet at right angles to the corrugations of the table are trimmed prior to corrugating by mounting the table on a carriage so that the edges engage rotating cutting-discs. The edges parallel to the corrugated sheet are trimmed by rotating discs supported on a frame having grooved rollers adapted to move along the lowered bars on rollers 1a, 6a.
Patent GB-1021123-A (GB)
Title: Method of separation of radium
Inventor: KREMER MARCELLE
IPC: C22B60/02
Filed: 1964-05-12
Abstract: Effluents containing radium and calcium are treated with a solution of a barium salt and a solution of a fatty acid salt of 15 to 18 carbon atoms in a linear chain in a quantity so as to precipitate and not float the radium.
Patent GB-1283195-A (GB)
Title: Fuel element assemblies for fluid-cooled nuclear reactors
Inventor: WILLIAMS MICHAEL ROGER LLOYD
IPC: G21C19/02
Filed: 1969-04-17
Abstract: 1283195 Fuel elements BRITISH NUCLEAR DESIGN & CONSTRUCTION Ltd 17 April 1970 [17 April 1969] 19781/69 Heading G6C A fuel stringer comprises a column of fuel elements 3 slidably mounted on a tie bar 1, and a head unit 4 disposed above the fuel elements and having a connection with the tie bar such that, when the stringer is in position in a reactor fuel channel, the head unit 4 compressively loads the fuel elements 3 vertically against a support (20) (Fig. 2, not shown) at the bottom of the fuel channel (12) and tension in the tie bar 1 is released. The tie bar 1 extends upwardly from a carrier ring 2 which supports a column of annular fuel elements 3. The head unit 4 is slidably mounted on the tie bar 1 and comprises a sleeved neutron shield plug 5, a heat shield 6 and a standpipe shield plug 8, the latter having an enlarged head 13 which is slidably contained within a tube 14, which in turn is attached to a standpipe closure plug 15. The tie bar 1 extends into a space within the tube 14 and a compression spring 16 is connected between the upper end of the tie bar 1 and the head 13 of the shield plug 8. In operation, with the fuel stringer suspended via the standpipe closure plug 15 from a grab head 17 of a refuelling machine, the sliding joint 13, 14 is extended and the spring 16 loads the tie bar 1 in tension and thus presses the fuel elements 3 and the head unit 4 together. If, when the stringer is lowered into its fuel channel, an element snags on an obstruction in the channel, the entire weight of the stringer, less the coolant upthrust forces, will act against the snag. If, however, the snag is sustained, the weight change experienced by the grab head 17 will be detectable by a weightsensing device so that lowering of the stringer cam can be stopped. When the stringer is fully inserted into its fuel channel, the carrier ring 2 seats on the support (20) and the closure plug 15 continues to be lowered until it rests on the upper end of the tie bar 1. The plug 15 is then pressed down against the spring 16 (Fig. 2, not shown) and locked into the standpipe. This has the effect of releasing tension in the tie bar 1 and transferring the loading of the spring on to the head unit 4 and hence the fuel elements 3.