baber/WOPTO huggingface dataset:
Patent GB-1018748-A (GB)
Title: Servo apparatus
IPC: G11B5/596
Filed: 1964-12-09
Abstract: 1,018,748. Automatic control of positions. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 9,1964 [Dec. 17, 1963], No. 50018/64. Heading G3R. A system for positioning transducers relative to a rotatable data storage mean, as disclosed in Specification 987, 357, incorporates a further servotransducer angularly displaced from the transducers in correspondence to the time lag of the system. As shown, data transducers are mounted on an arm 22 which is radially positioned by a servo-mechanism 42 relative to a magnetic storage disc 10 supported on a spindle 12. A servo transducer 30 is responsive to a path 32, consisting of two low frequency linearly recorded sine waves in two concentric tracks, to develop in a detector 36 a D.C. signal representing the deviation in amplitude and sense, of the transducer from the centre of the path. The D.C. signal is then fed through a compensator 38, comprising a voltage divider, to a circuit 60 in which it is summated with a similar signal derived from a fixed transducer 50, positioned to scan path 32 ahead of transducer 30, through a detector 56 and a compensator 58. The summated signal from circuit 60 is fed to the servo-mechanism 42 which, in operation, after approximately one revolution position the transducer 30 over the centre of the path. This results in the output of compensator 38 reaching a null. Henceforth the deviation detected by transducer 50 is the sole signal fed to the circuit 50 since the angular displacement of transducer 50 relative to transducer 30 is such that the time for a radius of the disc 10 to move between the transducers is equal to the time lag of the system.
Patent GB-1319494-A (GB)
Title: Production of diepoxide
IPC: C07D303/28
Filed: 1970-10-21
Abstract: 1319494 Diepoxides ATLANTIC RICHFIELD CO 21 Oct 1970 [4 Nov 1969 (2)] 50063/70 Heading C2C Diepoxides are prepared by contacting a non- conjugated diolefin with an oxidizing mixture of t-butyl or t-amyl alcohol and the corresponding t-butyl or t-amyl hydroperoxide in a mole ratio of hydroperoxide to diolefin of from 1À4 : 1 to 2À25 : 1 in the presence of a molybdenum containing catalyst at from 75 to 150‹ C. under at least autogenous pressure. The reaction mixture is preferably anhydrous and may contain from 50 to 500 ppm of molybdenum. Preferred diolefins are dicyclopentadiene, 1,5- hexadiene, 4-vinylcyclohexene-1 and dimethallyl ether. The reaction may be effected in the presence of the monoepoxide of the diolefin. Other starting materials which may be used are 1,4-pentadiene, 1,4-hexadiene, 1,4-cyclohexadiene, diallyl ether and allyl methallyl ether. Reference has been directed by the Comptroller to Specification 1,060,122.
Patent GB-1406824-A (GB)
Title: Polyurethane compositions
IPC: C08G18/48
Filed: 1972-10-31
Abstract: 1406824 Polyurethanes DOW CHEMICAL CO 31 Oct 1972 [3 Nov 1971] 50147/72 Heading C3R Solid, non-elastomeric rapid-set urethane resins, having a per cent elongation of less than 100%, are prepared by reacting together (1) a liquid isocyanate terminated reaction product of an organic polyol having 2-8 hydroxyl groups per molecule and a hydroxyl equivalent weight of less than 500 with an organic diisocyanate, the said reaction product containing 20-40 wt. per cent of free isocyanate groups, and (2) a liquid polyether polyol having 3-8 hydroxyl groups per molecule and a hydroxyl equivalent weight of 75-230 in the presence of a non- amine containing catalyst, and (3) 0-50 wt. per cent of (1), (2) and (3) of a liquid ester of a carboxylic acid having a boiling point above 150‹ C., the (1) and (2) components being present in amounts to provide an NCO to OH ratio of 0À8 to 1À5 and the catalyst being present in an amount of 0À01-5 wt. per cent of the sum of the weight of (1), (2) and (3). Preferred organic polyols for components (1) are polyether polyols. The preferred diisocyanate is toluene diisocyanate. Preferred catalysts are metal salts of C 2-20  carboxylic acids which are preferably used in liquid form if necessary in a solvent. Preferred esters are esters of C 1-20  mono- and polycarboxylic acids the ester portion of which preferably contains 1-20 carbon atoms. In the examples polyurethanes are prepared using as component (2) one of the following polyols prepared from (A) propylene oxide and glycerine; (B) ethylene oxide and glycerine; (C) propylene oxide and pentaerythritol; (D) propylene oxide and sucrose; (E) propylene oxide, sucrose and glycerine; and as component (1), one of the following prepolymers which are the reaction products of (i) polyol (A) and toluene diisocyanate; (ii) polyol (C) and toluene diisocyanate; (iii) polyol (E) and toluene diisocyanate; (iv) polyol (A) and xylylene diisocyanate; and either no ester component (3) or one of the following esters: dioctyl phthalate, dimethyl phthalate, diallyl phthalate, dimethyl adipate, ethyl acetoacetate, methyl abietate, in the presence of one of the following catalysts: lead octoate, lead naphthenate and tin carboxylate. 1406866 Polymerization of fluoroalkylacrylates HOECHST AG 17 Oct 1972 [18 Oct 1971] 47820/72 Headings C3P and C3G [Also in Division D1] A process for providing an oil and water repellant finish on polyester material comprises polymerizing and/or graft polymerizing fluoroalkyl acrylate or methacrylate on the polyester material in the presence of tetradichloroethane. The material is impregnated with the tetrachloroethane, a free radical initiator and the ester and then heated preferably in two stages in a closed system to polymerize the ester. In examples polyethylene glycol terephthalate fabric is impregnated with a solution of 1,1- dihydroperfluorooctyl acrylate or 1,1,2,2-tetrahydroperfluorodecane acrylate in tetrachloroethane containing t.butyl peroxide, wound in a roll and placed in a bag of polyester foil and then heated in one or two stages.
Patent GB-1326752-A (GB)
Title: Excess temperature switches
IPC: G05D23/24
Filed: 1970-10-22
Abstract: 1326752 Temperature control systems THERMOBAUELEMENT AG 22 Oct 1970 [4 Nov 1969]  50233/70 Heading G3R [Also in divisions G1 and G4] A temperature sensor comprises wires 2 and 3, one of which may be covered with a porous insulating layer, enclosed in a sheath 1 which may be of plastics material. The sheath may be filled with a salt or similar substance which upon melting generates a large number of free ions, so that the resistivity changes discontinuously at a well defined temperature. If the temperature rises at any point along the sensor to a value greater than the melting point of the salt, conduction occurs between the two wires. This may be detected by means of a bridge 8 whose off-balance current is amplified by transistors 9 and 10, and used to activate a relay 11, which may be used to switch off a heating element 13. In an alternative embodiment two conductor wires may be partly sealed into the wall of the sensor sheath, neither conductor being insulated. In another embodiment the conductors may be arranged as electrodes on the surface of a flat sheet.
Patent GB-1101882-A (GB)
Title: Improvements relating to circuit arrangements for detecting the presence of a vehicleon a route
IPC: B61L1/18
Filed: 1965-11-26
Abstract: 1,101,882. Track circuit signalling. WESTINGHOUSE AIR BRAKE CO. 26 Nov., 1965 [6 May, 1965; 9 July, 1965], No. 50281/65. Heading B7N. Track circuit arrangement using electrically continuous tracks for controlling wayside signals or the application of speed control signals to each train via the track circuits, wherein each track circuit includes two sections e.g. 6T, 5T, comprises cross bonds 30, 15 defining the ends of the circuit to which receivers R4W2 and R4W1 are coupled and a cross bond 16 connected across the rails intermediate the ends of the circuit to which a transmitter T4W is coupled. The transmitter and receivers in each track circuit are tuned to a frequency particular to that circuit. Additional receivers e.g. R4W3 may be provided connected directly across the rails and at track circuit junctions two receivers are coupled to the bond e.g. receivers R4W1, R3W2 tuned respectively to the frequencies of the circuits to the left and right of bond 15. In the speed control arrangement the cross bonds are also used to apply speed control signals, different in frequency from the track circuit signals, to the track and hence by inductive pick up to the trains. In the arrangement shown which shows track sections 6T-4T in approach to a station (not shown) a train in position X1 cuts off the supply from transmitter T4W to receiver R4W2 and drops relay TR6 with the result that a fast speed time A is applied via front contact (f.c.) b relay TR5 and back contact (b.c.) a relay TR6 and tone transmitter TC6 to bond 16 in advance of the vehicle. When the vehicle reaches position X2 it shunts out the outputs from transmitter T4W and deenergizes receivers R4W3 and R4W1 and hence their track relays TR5A and TR5. Low speed tone L is now opened via f.c. a relay TR4, b.c. a relay TR5 and tone transmitter TC5 to bond 15. If the track section 4T in advance is occupied, relay TR4 released, no tone is applied to section 5T and the train is braked to a halt. In the wayside signal control arrangement, Figs. 1 and 2 (not shown), the transmitters are directly connected across the rails intermediate the ends of the track circuits.
Patent GB-1275915-A (GB)
Title: Improvements relating to fluid-displacement machines
Inventor: ADAMS FREDERICK JOHN
IPC: F01C1/344
Filed: 1968-10-28
Abstract: 1275915 Roller vane pump, reciprocating pump CAM GEARS Ltd 27 Oct 1969 [28 Oct 1968] 50945/68 Headings F1A and F1F A roller-vane and/or reciprocating piston pump or motor comprises a rotor 7 having a plurality of radial slots 8 slidably receiving rollers 9 which engage a cam track defining at least one pair of symmetrically disposed chambers 11, the greater part of the cam track being defined by arcs about the axis of rotation of the rotor 7 at two different radii, 4A, 4B, the arcs being connected by straight line portions 4C. Each chamber 11 is connected to a pair of ports 10, 10A, for the input and output of fluid. The rollers 9 are spring urged into contact with the cam track, and have a slight clearance in their slots 8 to allow fluid to enter the bottoms of the slots 8, to facilitate reciprocation of the rollers 9. In a modification (not shown) the bottoms of the slots 8 are connected by ducts in the rotor 7 through non-return valves, to the pressure supply. In a further modification (not shown) the rotor 7 rotates on a fixed spindle having ducts ending in ports which during rotation register with ducts leading to and from the interior of the slots 8, the rollers 9, which are in this case a tight fit in the slots, acting as pistons as well as vanes.
Patent GB-1308713-A (GB)
Title: Pick up and enrobing apparatus for receiving horizontally disposed stick mounted confections and coating said confections
IPC: A23G9/26
Filed: 1970-10-27
Abstract: 1308713 Coating confectionery POLARMATIC CORP 27 Oct 1970 [16 June 1970] 50955/70 Heading A2A [Also in Division B8] In apparatus in which a confection such as ice cream is extruded, cut into slabs 16, and fitted with sticks 13 in a unit 10 and then passed by a conveyer 12 comprising flat plates 14 through a freezer 18, the conveyer, on emerging from the freezer is approached by a pick-up conveyer comprising an endless chain 42 running over sprockets or pulleys 28, 29, 30, 32 and carrying plates 48, Fig. 5, on which clamps 44 are pivotally mounted at 65 and adapted to remove the confections from the conveyer 12. The pick-up conveyer may pass over a fifth sprocket between the sprockets 28, 40. A clamping jaw 70 pivotally mounted at 73 on each clamp 44 is turned in the anticlockwise direction, as seen in Fig. 5, by an edge cam (not shown) engaging a projection 86 so that it is held by an overcentre spring 80 in an open position to allow a stick 13 to enter the clamp, and as the latter approaches the sprocket 32 another edge cam 100 engages the projection 86 to turn the jaw so that it clamps the stick 13. Slabs 16 which may be stuck to the plates 14 are released by a tapper mechanism 111. The slabs are conveyed around the sprocket 32 to a point at which a guide bar 46, which holds the clamps in the horizontal position, terminates allowing the clamps to swing to a vertical position so that the slabs are dipped in a coating tank 114 filled with chocolate, butterscotch, &c. A guide bar 118 returns the clamps to the horizontal position until they are clear of the tank after which they are again allowed to swing to the vertical position over a drip pan 120 and during their passage through a chilling tunnel 25, after which the jaws are released by a cam 124 to allow the slabs to fall onto a conveyer 26, an air jet from a nozzle 128 impinging on the sticks to ensure that they all extend towards the same side of the conveyer.
Patent GB-1318904-A (GB)
Title: Magnetic materials
IPC: G11B5/706
Filed: 1970-10-27
Abstract: 1318904 Modified chromium dioxide MATSUSHITA ELECTRIC INDUSTRIAL CO 27 Oct 1970 [27 Oct 1969 29 Oct 1969] 50969/70 Heading C1A [Also in Division H1] Ferromagnetic tellurium-iron modified chromium dioxide powder includes in the crystal structure as an integral part thereof 20-99À98% Cr, 0À01-20% Te and 0À01-60% Fe, based on the total of Cr, Te and Fe atoms. In one embodiment, the material contains 50-99À88% Cr, 0À01-15% Te, 0À01-20% Fe and 0À1-15% Sn. The ferromagnetic material may be made by heating to 280-480‹ C. at high pressure in an autoclave, CrO 3  together with elemental Fe, Te and Sn or compounds of these elements. Specified compounds are TeO 2 , TeO 3 , H 2 TeO 4 , H 6 TeO 6 , Na 2 TeO 4 , K 2 TeO 4 , Fe 2 O 3 , Fe 3 O 4 , Fe(OH) 3 , Fe(NO 3 ) 3 , FeSO 4 , Fe 2 (SO 4 ) 3 , FeS, Fe 2 (CrO 4 ) 3 , Fe 2 (Cr 2 O 7 ) 3 , SnO, SnO 2 , H 2 SnO 3 , SnSO 4 , Sn(COO) 2  and Sn(C 2 H 3 O 2 ) 2 . The products have a high coercive force, and are useful in making master magnetic records.
Patent GB-1398456-A (GB)
Title: Gas turbine engines
IPC: F02C7/14
Filed: 1973-11-05
Abstract: 1398456 Gas turbine engine; bearing arrangement BROWN BOVERI - SULZER TURBOMACHINERY Ltd 5 Nov 1973 [8 Nov 1972] 51291/73 Heading FIG [Also in Division F2] A gas turbine engine comprises a multi-stage compressor 3 and a turbine 2, the rotors of which are mounted on a common shaft, there being a shaft bearing 1 between the compressor and the turbine. The bearing is disposed within a housing 35 which is sealed against the shaft by contact-free labyrinth seals 4, 5 and 6, 7, the spaces 8 and 9 between the seals 4, 5 and 6, 7 being supplied with air under pressure to act as a barrier fluid. The pressure air is taken from a chamber 36 at the diffuser outlet through line 18 to cooler 19, the cooled air then passing through lines 20, 21 to the seal spaces 8 and 9. Lubricating oil is supplied to the bearing from reservoir 26 through pump 27, cooler 28 and pressure regulator 34 and line 29, oil returning from the bearing housing 35 through drain line 22 to the reservoir 23 which is pressurized to pressure P' 2  within the housing 35 through line 13; the pressure P' 2  is also communicated through a line 44 connected to the line 13, to the pressure regulator 34. Air under pressure leaking through the seals 5 and 7 passes into chamber 39 and  thence through annular gap 42 into the space between the last row of compressor rotor blades and the fixed blade row 10 at the inlet to the diffuser 12. Oil passes from the reservoir 23 to the reservoir 26 through line 25 controlled by float-operated valve 24. The reservoir 26 is maintained at a pressure less than atmospheric by means of an air pump 33.
Patent GB-1462858-A (GB)
Title: Device  for the display of the time in hours and minutes
IPC: G04B13/00
Filed: 1973-11-07
Abstract: 1462858 Clocks and watches E SCHOLER 7 Nov 1973 51587/73 Addition to 1370113 Heading G3T Relates to a time display device for a clock substantially as described in Specification 1370113, but the design and construction of the toothed gears is more fully dealt with in the present Specification. The larger annular gear Figs. 2, 3 has NX thirteen teeth or projections and the other gear NX twelve teeth, the ratio of radii of their base circles H and M being 11:13. A characterizing feature of the invention claimed is that the maximum effective radius of each of the two gears is smaller than the pitch circle radius, preferably by a factor of two or more.
Patent GB-1518450-A (GB)
Title: Preparation of aromatic polymer
IPC: C08G65/00
Filed: 1976-12-10
Abstract: 1518450 Polyphenylene ethers DENKI KAGAKU KOGYO KK 10 Dec 1976 [19 Dec 1975] 51716/76 Heading C3R Aromatic polymers are obtained by reacting an alkali metal diphenolate with a dihalodiphenyl compound at 200‹ C. to 400‹ C. in the presence of 0À1 to 30 % by weight of an inert nonpolar aromatic compound which lowers the melt viscosity of the reaction mixture. In Examples polymers are prepared by reacting the dipotassium and disodium salts of 4,4<1>- dihydroxydiphenylsulphone with 4,4<1>-dichlorodiphenylsulphone, by reacting the dipotassium salt of 4,4<1>Àdihydroxydiphenylketone with 4,4<1>- dichlorodiphenylsulphone and by reacting the dipotassium salt of 2,2-bis-(4-hydroxyphenyl) propane with 4,4<1>-dichlorodiphenylsulphone; the aromatic compounds added are biphenyl, diphenyl ether, m-terphenyl, naphthalene and diphenyl ether.
Patent GB-1217485-A (GB)
Title: Improvements in or relating to can openers
Inventor: RESSLER LLOYD
IPC: B67B7/46
Filed: 1966-11-21
Abstract: 1,217,485. Can openers. JUDGE INTERNATIONAL Ltd. 17 Jan., 1968 [21 Nov., 1966], No. 51947/66. Heading B8D. A magnetic can lid holder, which may be removable, for a can opener comprises a flexible arm 36, e.g. of plastics, made resilient by a notch 44, and attached to a hub 46, of a rotatable cutter disc 10, mounted on an inclined spindle 8. By movement of a crank 16, a traction wheel 20 engages a can rim and rotation of a handle 22 effects cutting. A lever 24, has integral guide projections (32), Fig. 1 (not shown), and is biased downwardly, by a spring (28), on to the top of the can rim, to maintain the lower edge of the rim in engagement with the traction wheel 20.
Patent GB-1447128-A (GB)
Title: Reservoir cap
IPC: G09F3/12
Filed: 1974-12-02
Abstract: 1447128 Riveted joints AISIN SEIKI KK 2 De 1974 [6 Dec 1973] 52031/74 Heading B3U [Also in Division B8] An information plate (see Division B8) 12 is located in a recess 12a of a cap and secured thereto by a rivet 13. The rivet head 13a is initially divergently tapered and is received in a blind recess in the underside of the plate and secured by caulking over the metal of the information plate. The plate and rivet are both made of metal and the cap can be formed in situ around a bent-over stem 13c of the rivet or the stem may be bent-over in a through-hole of the cap body 11.
Patent GB-1286999-A (GB)
Title: Flavor-releasing smoking article and method of making the same
IPC: A24D3/14
Filed: 1969-10-23
Abstract: 1286999 Tobacco-smoke filters PHILIP MORRIS Inc 23 Oct 1969 [13 Dec 1968] 52070/69 Heading A2C [Also in Division C3] A tobacco-smoke filter comprises a solid, cross-linked, microporous organic polymer having a particle size from 5 to 850 microns and a surface area of at least 50 square meters per gram containing from 10 to 100 parts by weight, per 100 parts by weight of the polymer, of a flavouring agent for tobacco smoke, the polymer being capable of removing undesirable components from the tobacco smoke. The polymers are formed from diethylenically unsaturated monomers by homopolymerization, by copolymerization of mixtures of them, or by copolymerization with monoethylenically unsaturated monomers, the microporous structure being obtained by polymerization under special conditions or by after-treatment (see Division C3). The preparation of a number of such polymers is exemplified, but the examples disclosing the making of filters containing a flavouring agent are restricted to the use of ethylvinylbenzene-divinylbenzene crosslinked polymers, commercially available as "Porapak Q" (Trade Mark) polymers, which are sphere-like particles of 80 x 100 mesh size having an average pore size of 10 Angstrom units and a total surface area of 100 square meters per gram. Flavours exemplified are anethole, menthol and lime oil, but long lists of other suitable flavouring materials comprising organic acids, aldehydes, ketones, ethers, esters and alcohols are given. Preferably the filters are made by sprinkling the polymer granules, after impregnating with a flavouring material, onto an opened cellulose acetate filter tow, and then forming the composite material into a filter rod and cutting it into filter element lengths.
Patent GB-1308498-A (GB)
Title: Poromeric laminate
IPC: D06N3/10
Filed: 1970-11-03
Abstract: 1308498 Porous coating B F GOODRICH CO 3 Nov 1970 [3 Nov 1969] 52118/70 Heading B2E A poromeric laminate is produced by coating a fabric with a synthetic polymer, setting and curing the polymer in poromeric configuration rapidly enough so that the polymer layer penetrates the substrate but to a depth no greater than 1/3 of the fabric thickness and the amount of polymer which penetrates the fabric is no more than 20% by weight of the fabric, the cured layer being in adhering configuration with the fabric, and coating the cured polymer layer with a microporous film of polyurethane. The fabric may be woven or non-woven bonded at fibre intersections by a binder, e.g. butadiene - styrene, butadiene - acrylonitrile latices, polymers and copolymers of acrylates and methacrylates. Non-woven fibres may be rayon, nylon, polyethylene terephthalate, polypropylene, polyacrylonitrile. Depth of penetration of the polymer into the fabric may be controlled by varying the viscosity of the polymer, or the amount of water pickup on the fabric or by placing a plastics scrim layer on the substrate. Fibre flock may be applied to the polyurethane top coating. The products may be used for manufacturing clothing and footwear. In the Example, a non-woven batt of polypropylene and rayon fibres is treated with a softener and coated with a layer of a carboxylic butadieneacrylonitrile copolymer latex, the latex layer coagulated by passing through a bath of calcium chloride solution, the latex layer cured at 275F. for 5 minutes, the cured latex layer coated with a film of an essentially linear polyesterurethane as a cloud paint solution in dimethyl formamide, the structure then immersed in water to remove dimethyl formamide leaving a porous layer of polyurethane. After dyeing the laminate is finish coated, e.g. with pigmented ethyl acrylate-acrylonitrile latex, embossed and a nitrocellulose top dressing coat applied.
Patent GB-1487902-A (GB)
Title: Preparation of fertilisers and soil modifiers
IPC: C01G49/00
Filed: 1975-12-19
Abstract: 1487902 Fe(OH) 3 , Fe 2 (SO 4 ) 3  and (NH 4 ) 2 SO 4 ; soil modifiers SOC ITALIANA RESINE SIR SpA 19 Dec 1975 [20 Dec 1974] 52172/75 Headings C1A and C1B A soil modifying composition and a concentrated (NH 4 ) 2 SO 4  solution are prepared from the solid by-products obtained in TiO 2  production from ilmenite or ilmenite slag by the sulphate process (a) contacting the by-product consisting essentially of FeSO 4 7H 2 O with gaseous NH 3  to obtain essentially (NH 4 ) 2 SO 4  and Fe(OH) 2 , (b) oxidizing the product of step (a) to obtain Fe(OH) 3  using O 2  or a molecular oxygen containing gas, (c) lixiviating the product of step (b) with water to remove 85 to 95 wt. per cent of the (NH 4 ) 2 SO 4  in the form of an aqueous solution having an average (NH 4 ) 2 SO 4  content of at least 40 wt. per cent and separating the solution from the residual solids, and, (d) drying the solids to a water content of <20% by wt. to obtain the soil modifier composition. Step (a) may be carried out at from 20‹ C. up to just below the melting point of FeSO 4 7H 2 O; under these conditions step (a) may be carried out simultaneously with step (b) in a single reaction stage. The dried residual solid step (d) may be treated with H 2 SO 4  to convert at least 5 mole per cent of Fe(OH) 3  on to the sulphate for use as soil modifier. Reference has been directed by the Comptroller to Specification 1,418,623.