baber/WOPTO huggingface dataset:
Patent GB-1416754-A (GB)
Title: Method of and apparatus for measuring the electrostatic capacity of a capacitor
IPC: G01R27/26
Filed: 1973-09-05
Abstract: 1416754 Measuring capacitance IWATSU ELECTRIC CO Ltd 5 Sept 1973 [21 Sept 1972] 41656/73 Heading G1U To measure the capacitance Cx of capacitor 8, during a first period To, both it and a standard capacitor 6 are charged to a reference potential Vo; during a second fixed period T, capacitor 6 is discharged via resistor 5 and its voltage at the end of T, is held; during a third period T2, the unknown capacitor 8 is discharged via resistor 7 until its terminal voltage equals the held voltage of the other capacitor 6 and T 2  is then measured.  The time measurement is effected digitally using a clock generator 16 and pulse counter 14 which is connected to a circuit 18 which controls switches 2, 3, 4 to provide the necessary charge and discharge paths during the relevant periods To, T 1  T 2 . Period T 2  is measured by counting the pulses received for the opening of switch 2 until comparator 9 detects equality of the capacitor voltages. Suitable choices of the resistances 5, 7 and capacitance 6 enable the counter output to be conveniently calibrated. In other embodiments Figs. 3 and 5 (not shown) a switch between resistor 7 and earth is provided in order to reduce current drain on the source V 0  during To and T 1 . When the capacitance 6 may be voltage dependent, a bias voltage is inserted in series therewith to simulate its actual working conditions Figs 4 and 5 (not shown).
Patent GB-1181480-A (GB)
Title: Improvements in or relating to Vinyl Chloride Polymerization
IPC: C08L1/28
Filed: 1968-08-30
Abstract: 1,181,480. Polymerizing vinyl chloride. HERCULES Inc. 30 Aug., 1968 [1 Sept., 1967], No. 41659/68. Heading C3P. Vinyl chloride is polymerized in aqueous dispersion using as dispersing agent either hydroxypropyl cellulose having an M.S. of at least 2 or a reaction product of cellulose, propylene oxide and ethylene imine having a hydroxypropyl M.S. of at least 2 and an aminoethyl M.S. of 0À01-3À0. In the examples, lauroyl peroxide is used as catalyst.
Patent GB-1531798-A (GB)
Title: Ethylene/chlorine elimination process
IPC: C07C17/00
Filed: 1976-10-07
Abstract: 1531798 Hydrocarbon chlorination catalyst STAUFFER CHEMICAL CO 7 Oct 1976 [5 Nov 1975] 41704/76 Heading B1E [Also in Division C2] In a process for chlorinating ethylene a fixed catalyst bed comprises a mixture, i.e. alternate layers or a random mixture, of metallic iron and particles of activated alumina impregnated with feric chloride either by prior treatment or by in situ deposition by the action of chlorine on the metallic iron, in which the ratio of the superficial surface area of the iron to the total BET surface area of the alumina particles ranges from 1.5 times the total surface area of the inner reactor wall divided by the total BET surface area of the alumina, or 1 x 10<SP>-7</SP>, whichever is greater, to 2 x 10<SP>-6</SP>.
Patent GB-1479329-A (GB)
Title: Silica filler useful in dental and medical restorative materials
IPC: A61K6/884
Filed: 1974-09-27
Abstract: 1479329 Silica filler LEE PHARMACEUTICALS 27 Sept 1974 [28 Sept 1973] 42177/74 Heading ClA A naturally occurring silica is (a) treated with excess strong mineral acid (as defined) in aqueous solution at between 30‹ C. and the boiling point of the acid for at least one hour and (b) heating the silica to a temperature of from 900‹ to 1200‹ C. to remove the acid insoluble impurities. Strong mineral acids are those which will remove acid-soluble impurities, but will not dissolve silica. Typical acids are HCl (5% to saturation), H 2 SO 4  (10 to 100%) and HNO 3  (3% to saturation). The acid (a) and thermal (b) treatment steps may be performed in any sequence and either step may be repeated a plurality of times. The treated silica may be coated with silanes to provide effective bonding with epoxy or other synthetic resinous material.
Patent GB-1029857-A (GB)
Title: Hydraulic transmission mechanism
Inventor: FANTOM BRIAN HENDERSON
IPC: F16H61/42
Filed: 1963-10-28
Abstract: 1,029,857. Hydrostatic transmissions. JOSEPH LUCAS (INDUSTRIES) Ltd. Oct. 28, 1964 [Oct. 28, 1963], No. 42335/63. Headings F2C, F2D. [Also in Divisions B7 and F1] To facilitate tow starting of a vehicle in which an engine 12 drives the rear wheels 15 through an hydraulic pump 10 connected by supply and return conduits 16, 17 with hydraulic motor 13 and the strokes of the motor and pump are adjustable by driver controlled servo devices 20, 21 normally supplied with fluid by engine driven pump 25, a manual valve 45 is provided which may connect the outlet of the motor 13 with the servo devices to suitably alter the strokes of pump and motor from their respective rest positions of zero and maximum stroke. When the valve 45 is opened fluid from motor 13 flows through conduit 17, check valve 38, central bore 39 of high pressure relief valve 32 and valve 45 to the servo devices 20, 21 while make-up fluid is sucked from reservoir 24 through the conduit 29 and check valves 47, 30 into conduit 16 until the engine starts and the system operates normally. The high pressure relief valve 32 protects the main circuit from damage due to excessive pressures by connecting conduits 16, 17 through annulus 44. In operation when relief valve 41 is opened by fluid passing through check valve 37 or 38 and bore 39 a pressure drop occurs across orifice 40 sufficient to move piston 33 against spring 36 thereby connecting parts 42 and 43 through annulus 44.
Patent GB-921968-A (GB)
Title: Method of stabilising coloured polyvinyl acetals and ketals
IPC: C08K5/13
Filed: 1960-12-08
Abstract: Coloured polyvinyl acetals or ketals may be stabilized with an organo-tin compound and a bisphenyl of the formula <FORM:0921968/IV(a)/1> R and R1 are alkyl radicals.  The hydroxyl group in each phenyl radical is generally in the para-position and the phenyl radicals may be monochlorinated or monoalkylated by an alkyl radical with 1-3 carbon atoms.  A large number of examples of organo-tin compounds are given including diorgano-tin oxides, triorgano-tin hydroxides, hexaorganodistannoxanes, tin alcoholates, tin carboxylates, chelated tin compounds, dialkyl- and trialkyl-tin acylates, organo- and diorgano-tin sulphides, organo-polytin sulphides, tin mercaptides, di- and tri-alkyl-tin thiomaleates and tin-mercaptobenzthiazole. Specified colouring matters are azodyestuff pigments.  The proportion of stabilizer used may be between 0,1 to 5% for the bisphenol and 0,1 to 3% for the organo-tin compound both based on the weight of polymer used.  The stabilizer may be incorporated at any stage in the production.  In the examples a solution of polyvinylbutyral, triethylene-glycol di-(2-ethylbutyrate) as plasticizer, in methanol was stabilized by dibutyl-tin bis-(monobutyl maleate) and para:para1-dihydroxy-2:2-diphenyl-propane.  Dyestuffs were added and the whole stirred until homogenous and then coated on a sheet of glass, heated for some time, and no discoloration occurred.
Patent GB-1407900-A (GB)
Title: Method and apparatus for drying polymerica materials
IPC: B29C48/76
Filed: 1973-09-11
Abstract: 1407900 Drying POLYSAR Ltd 11 Sept 1973 [15 Sept 1972] 42645/73 Heading BIB [Also in Division F4] Extrudable polymeric material, containing volatile liquid is dried in an extrusion dryer 10, by compressing it in a zone 37 maintained at a temperature capable of vaporising the liquid at atmospheric pressure and at a pressure sufficient to prevent such vaporisation, forcing the material through a restriction into an expansion zone 38 at atmospheric pressure whereby most of the liquid is rapidly vaporised and the material expanded and ruptured into crumb, the crumb and liquid being conveyed through the zone 38 and discharged at an outlet 13. As shown, the material containing between 5% and 8% by weight of water is fed from a hopper 12 into a doubel barrelled structure 15 having opposite handed worm screws 23, 23a rotatable in opposite directions. To pressurise the material up to the restriction the stem diameter and pitch of the screw flights of each screw 23, 23a are respectively progressively increased and decreased and at the restriction the screw stems form blisters 25, 25a. The restriction is formed by a block valve 22 having a valve block 28 provided with surfaces 29, 29a, the block 28 being vertically adjustable by means of a screw and handwheel 33 to vary the distance between surfaces 29, 29a and blisters 25, 25a and hence the back pressure in the material upstream of the block valve. The material is heated by the compression and maintained at the required temperature by heating or cooling jackets 20 in the barrel 15. In the expansion zones 38 the screws are of constant pitch and stem diameter and serve only to convey the material. Instead of a dual screw extrusion dryer a single screw type may be used.
Patent GB-976230-A (GB)
Title: Improvements in or relating to mixing apparatus
Inventor: PICKLES KENNETH
IPC: B01F7/00
Filed: 1962-11-14
Abstract: 976,230. Stirrers for mixers; pulverizing. GEORGE TWEEDY & CO. Ltd. Nov. 8, 1963 [Nov. 14, 1962], No. 43021/62. Headings B1C and B2A. A rotor for a dough-mixing machine comprises an imperforate plate 10 mounted for rotation about a central vertical axis and having two or more blades 16 projecting at right angles from its under surface and extending beyond the periphery of the plate, and an upstanding central column 20 from which project one or more blades 26, 28 having at least a portion helically inclined. As shown in the Figures (the rotor being assumed to rotate anti-clockwise in Fig. 2) the plate 10 is octagonal ; the blades 26, 28 are of helical scroll form, the portion AB being of smaller pitch, and they merge into two curved blades 22, 24 on the upper surface of the plate. Specification 890,403 is referred to.
Patent GB-1470706-A (GB)
Title: Process for fire-proofing shaped articles of aromatic polya mides
IPC: C08J7/05
Filed: 1974-10-04
Abstract: 1470706 Fireproofing TEIJIN Ltd 4 Oct 1974 [5 Oct 1973 26 Nov 1973 25 Feb 1974] 43158/74 Heading DIP [Also in Division C3] A process for fireproofing a shaped article of an "aromatic polyamide" comprises (a) contacting it with a 2 to 30 wt % solution of an HaL- and S-free P-containing inorganic acid or ammonium, amine or urea salt thereof (b) drying the treated article at not above 150C, and (c) heat-treating the dried article at 300 to 450C for a time insufficient to cause substantial distortion. "Aromatic polyamide" is defined as a substantially linear polymer wherein at least 15 mol % of the links between aromatic rings are amide links and up to 85% are ether, ester, imide, hydrazide, azo, sulphone, sulphonamide, imidazole, oxazole, thiazole, triazole, alkylene and/or oxadiazole; the aromatic rings may be substituted by Ha, NO 2 , OH, COOH or C 1-4  alkyl or alkoxy. Specified polymers are those containing one or more of the following recurring units:- Specified acids and salts are orthophosphoric acid and its ammonium dihydrogen, urea, and dihydrogen dimethylamine, n-butylamine and hexamethylene diamine salts; phosphorous acid and its ammonium mono- or dihydrogen, dihydrogen aniline, and urea salts; polyphosphonic acid and its ammonium and dimethylamine salts; and pyrophosphoric and hypophosphorous acids. The shaped article may be a film, sheet, fibre, filament, tow, yarn or fabric, The treated products may be used for filter bags, ironing stand covers, fire protective clothing, electrically insulating materials, curtains, drapes and furnishing materials. Reference is made to Specifications 1307601, 1242867, 1236282 and 1235548.
Patent GB-1020240-A (GB)
Title: Improvements in and relating to carburettors
IPC: F02M11/10
Filed: 1962-11-16
Abstract: 1,020,240. Spray carburetters. GURTNER S.A. Nov. 16, 1962 [Jan. 10, 1962], No. 43377/62. Heading FIB. In a carburetter having nozzles 15, 17, opening into separate intake passages 8-10 which are brought into operation in succession by opening of the throttle valve 4, the nozzles are fed through a single jet 12 and aerating air is supplied partly through an opening 14 and partly through any nozzle which is not in operation. The jet 12 opens into an aerating passage 13 into which the nozzles open through jets 20-22. In a modification each nozzle has a separate aerating inlet 14.
Patent GB-1455874-A (GB)
Title: Bulk material containers
IPC: B65D33/36
Filed: 1973-09-17
Abstract: 1455874 Bags for bulk material F NATTRASS and P. J. NATTRASS 6 Sept 1974 [17 Sept B8K 1973] 43599/73 Heading A bag for bulk material comprises an outer bag of unpigmented polypropylene and a liner of an impervious plastic terminating in a tubular section 14 surrounded by inner and outer tubes 12, 13 on the outer bag. A cord 15 closes the tube 14 and further cords close the other tubes. The upper end of the bag has a skirt 7 stitched to side walls 4 and is also provided with lifting loops 5. A lid 8 may be secured to one of the walls 4. When emptying the bag the lower end of tube 14 is tied at 22 around an entry tube 19 of a receiving container 20. The outer bag may have a shroud to shield it from ultra-violet light. The outer bag is re-usable and the inner bag has limited re-use.
Patent GB-1287011-A (GB)
Title: A hydraulic liquid distributor for a reversible hydraulic axial or radial piston machine
IPC: F01B3/00
Filed: 1969-09-03
Abstract: 1287011 Hydraulic motors G DUSTERLOH GmbH 3 Sept 1969 [5 Oct 1968] 43624/69 Heading F1A A valve plate 7 controlling the supply to and exhaust from the cylinder ports 25 in the cylinder block 4 of a radial or axial cylinder machine is actuated by an eccentric 5 on a shaft 6 and is composed of two telescoped rings 9, 10. The rings 9, 10 are urged apart by dish washers 27. Thus the end surfaces 11, 13 of the rings are urged into sealing engagement with respective surfaces 12, 14 on a cover 1 and the cylinder block 4. The valve plate thus separates an annular inlet (or outlet) chamber 26 from an outlet (or inlet) chamber 19. These chambers 19, 26 have connections, 2, 3 and are alternately communicated with the ports 25 when relative rotation occurs between the eccentric 5 and the block 4. Movement of the valve plate exposes each port 25 directly to the chamber 26 and to the chamber 19 via an annular groove 15α and the spaces between the balls 35 of a bearing between the inner ring 9 and the eccentric 5. In a second embodiment the chambers 19, 26 are supplied and exhausted through passages in the shaft 6 which is held stationary while cylinder block 4 and cover 1 are rotated.
Patent GB-1014698-A (GB)
Title: Boat hull
IPC: B63B1/20
Filed: 1963-11-07
Abstract: 1,014,698. Boat hull forms. DEHN, S. G. (ALIM ASSOCIATION INC.). Nov. 7, 1963, No.44000/63. Heading B7A. A hull for a small motor-powered craft, including a transom stern 2 and chines 4 above which freeboard sides 5 from the stern terminate in a V-shaped bow 1 has a bottom structure comprising a bottom portion 6 extending from a keel 8 to the freeboard sides and transom stern, a plurality of longitudinal steps 9, 10, 11 on the bottom portion extending substantially parallel to the vertical plane 7 of the keel, while the cross-section of the bottom portion enter in a vertical plane perpendicular to the keel coincides with the equal sides of an isosceles triangle, the angle between the sides increasing in regular fashion from an acute angle in the forward part of the hull to an obtuse angle in the after port. The hull may be moulded in one piece from a laminate of fibreglass and resin. Offsets are given.
Patent GB-968858-A (GB)
Title: Improvements in or relating to electric typewriters with automatic underlining or overlining facilities
IPC: B41J29/26
Filed: 1960-12-22
Abstract: 968,858. Typewriters &c. PAILLARD S.A. Dec. 22, 1960 [Jan. 20, 1960], No. 44085/60. Drawings to Specification. Heading B6F. In a typewriter wherein the type bars are operated by electromagnets to effect printing a device is provided to automatically produce an electric impulse to print a horizontal line above or below each character before it is typed. The device produces an electric impulse between each character printing impulse to cause an electromagnet to operate a type-bar to print a horizontal line above or below where the next character is to be printed. The line printing type-bars either do not actuate the letter spacing escapement or a complementary device is provided to prevent carriage movement.
Patent GB-906878-A (GB)
Title: Anti roll device
IPC: B64C1/00
Filed: 1959-12-29
Abstract: 906,878. Controlling aircraft. NORDAVIATION SOC. NATIONALE DE CONSTRUCTIONS AERONAUTIQUES. Dec. 29, 1959 [Sept. 8, 1959], No. 44103/59. Class 4. An anti-roll device for use in aircraft or missiles comprises a wedge-section member 8 mounted outboard on a wing or nacelle to house a spoiler flap which oscillates about a pivot 5 and comprises a web 7 and an arcuate vane 6. The part of member 8 remote from its mounting on the aircraft is closed by an end plate 22. Electromagnets 9 and 10 energized by a remote-control servo mechanism, cause the arcuate part of the spoiler to extend beyond one wedge face or the other of member 8 thereby producing a roll effect on the aircraft.
Patent GB-1147655-A (GB)
Title: Improvements in and relating to measuring instruments for use with a thermo-luminescent dosimeter
IPC: G01T1/115
Filed: 1966-10-03
Abstract: 1,147,655. Measuring peak light intensity photo-electrically. MANUFACTURE BELGE DE LAMPES ET DE MATERIEL ELECTRONIQUE. Oct.3, 1966 [Oct.1 1965], No.44104/66. Heading G1A. [Also in Division H3] In apparatus for measuring the peak value of a light signal e.g. from a thermoluminescent dosimeter, the voltage across a capacitor is made to follow the voltage across a resistor carrying the current from a photo-cell while the current is increasing and to hold the maximum voltage attained. This voltage is then measured. In Fig 1, the resistor 2 and capacitor 3 are effectively connected to the inputs of a differential amplifier 4 so that so long as the voltage across resistor 2 is greater than across capacitor 3, current flows through a diode 5 to charge the capacitor. In a modification, Fig. 2 (not shown) the resistor and capacitor are respectively connected directly between the two inputs of the amplifier and earth and the polarity of the diode is reversed. In order that the capacitor may not be substantially discharged when connected to a voltmeter to determine the voltage attained, an auxiliary capacitor is charged in parallel with the main capacitor and when the apparatus is switched for measuring voltage, the auxiliary capacitor replaces the resistor as input to the differential amplifier, the output of which maintains the charge on the main capacitor, Fig. 5 (not shown). In Fig. 6, the amplifier is a self-oscillating dielectric amplifier (see Division H3). When the capacitor 3 has been charged to its peak value through the diode 5 the switches 16, 17 and 18 are changed over and the short circuit removed from an auxiliary capacitor 3'. The auxiliary capacitor is charged from the output of the amplifier through a diode 19 to a voltage dependent on the voltage on the capacitor 3 and the voltage thus attained is measured by a meter 15. The switching may be effected by transistor switching circuits, Fig. 7 (not shown).
Patent GB-1121575-A (GB)
Title: Fluorescent phosphor composition
IPC: C09K11/77
Filed: 1966-10-04
Abstract: A phosphor consists of strontium fluoro- or chloro-borate activated by europium, preferably in divalent form.  The preferred formula is SrzFxClyB3O5[Eu 0.005-0.05] wher x = 0.00-0.97, y = 0.01-0.98, x + y = 0.98, z = 0.90 and 0.99; the sum of the Sr and Eu atoms is preferably stoichiometric with the sum of the borate and halide radicals. Two examples of preparation are given involving double firing, once at 900 DEG  C. in air and again at 915 DEG  C. in hydrogen, more strontium halide being added after the first firing. Colours vary with the Cl/F ratio, from blue with only Cl to yellow-orange with mainly F.
Patent GB-1001760-A (GB)
Title: Improvements in or relating to sealing rings and methods of making them
IPC: B26D3/16
Filed: 1962-11-22
Abstract: 1,001,760. Mechanical seals. FORSHEDA GUMMIFABRIK A.B. Nov. 22, 1962 [Nov. 23, 1961; May 16, 1962], No. 44271/62. Heading F2B. A rubber &c. sealing ring 1 for a rotary shaft 7 where it extends through a wall 9 comprises a ring portion 6 and an integral sealing lip 8 that extends from the inner part of the portion 6 and terminates in a sealing edge engaging the wall and defined by an inner surface of revolution 5 and an outer conical surface 11. The surface 5 may be curved, for example generated by an arc of a circle. The bore of the portion 6, in its free state, is less than the diameter of the shaft so that the ring tightly grips and rotates with the shaft. Rings may be made by rotating a rubber tube 12, Fig. 2, on a mandrel 13, the tube having grooves 10 formed therein either before or after mounting the tube on the mandrel, and cutting slits in the tube to form the surfaces 5 and 11 by means of two sets of tools 14 and 15 respectively, the tube being held axially by a guide 18 engaging one of the grooves 10. The slits made by the tools 14 terminate a small distance from the bore of the tube so that when required a sealing ring can be separated from the tube manually.
Patent GB-442819-A (GB)
Abstract: 442,819. Autographic recorders. BERGMANN, J., 12, Am Sandwerder, Wannsee, Berlin. May 16, 1935, No. 14396. Convention date, May 30, 1934. [Class 106 (i)] In an autographic recorder provided with adding means, the adding device is mounted in a desk-shaped holder b removably supported in a desk-shaped outer case c containing a rolled-up record strip advanced manually. The holder is formed of cast metal and is inserted from beneath into an aperture in the top of the sheet metal case, where it is retained by rods i and a tongue e. The record strip is led from a supply roll o through slots in the holder to a storage roll q. A rubber drive roller t is pressed against the storage roll by springs x and is rotatable manually to advance the strip. One of the springs x acts on the roller t through a yoke w, Fig. 3, and ratchet wheel v to prevent reverse rotation of the roller.
Patent GB-1522033-A (GB)
Title: Wired television broadcasting systems
IPC: H04N7/16
Filed: 1975-10-29
Abstract: 1522033 Wired broadcasting COMMUNICATIONS PATENTS Ltd 27 Oct 1976 [29 Oct 1975] 44500/75 Heading H4R In a wired television broadcasting system in which a number of programme signals are available on separate conductive paths to each of a plurality of programme selectors controllable by respective subscribers to the system, the selectors being either remote controlled or on the subscribers premises, the conductive paths are divided into groups, each group having a number of pairs of channels, with the channels of each pair having carrier frequencies which are offset by an integral multiple of half the line scan frequency and the phases of the carriers of the channels in the different pairs differing by an odd integral multiple of 90. As described carrier sources 11 and 12 provide carriers of about 8À9 MHz which differ by half the line scan frequency, each carrier source feeds a phase splitting transformer 13, or 16, Fig. 2 (not shown) to provide two outputs, 180 degrees out of phase, which feed respective phase shifters 14, 15, 17, 18, Fig. 3 (not shown) which each produce two outputs which are relatively shifted in phase by 45 degrees relative their input. The outputs of the phase shifters 14-18 feed respective modulators 27 to be modulated by respective programmes 28, and fed to the distribution network 29.
Patent GB-1089689-A (GB)
Title: Storage compartment for the passenger enclosure of a motor vehicle
IPC: B60R7/06
Filed: 1966-10-07
Abstract: 1,089,689. Vehicle dashboards. DR. ING H.C.F. PORSCHE KOMM. GES. Oct. 7, 1966 [Oct. 15, 1965], No. 44901/66. Heading B7B. The glove compartment in a vehicle dashboard is closed by a vertically sliding panel of plastics &c. material.