baber/WOPTO huggingface dataset:
Patent GB-924907-A (GB)
Title: Improvements in and relating to vacuum brake systems
Inventor: STRETTON HENRY JACKSON
IPC: B60T13/46
Filed: 1960-11-08
Abstract: 924,907. Vacuum brakes. G. D. PETERS & CO. Ltd. Sept. 25, 1961 [Nov. 8, 1960], No. 38360/60. Class 103 (1). In a device for controlling the vacuum brake system of railway vehicles, means is provided which can be set to maintain a vacuum differential between the train pipe and the brake cylinder to afford a reduced braking effect when the vehicle is empty, valve means 17 being provided for enabling full braking effect to be obtained when the wagon is loaded. The device comprises an upper chamber 1 having a lightly-loaded atmospheric inlet valve 5 arranged to be moved into an open position by a diaphragm 3 when air is admitted from the train pipe to a lower chamber 2, the upper chamber 1 having direct communication via passage 15 with the brake cylinder connection 14 through the valve means 17 which can be set to close the communication and open a further communication via passage 16 between the lower chamber 2 and the brake cylinder connection 14 when the full braking effect is required. The diaphragm and a vacuum control valve 12 are loaded by springs which may be adjusted or set for a particular vehicle with reference to its loaded weight or tare weight. The diaphragm and vacuum valve springs 9 and 13 are set to give a vacuum differential of five inches such that the train pipe will have five inches of vacuum before the vacuum valve 12 starts to open.
Patent GB-345328-A (GB)
Title: Method of preparing animal meats for the market
IPC: A22B5/00
Filed: 1929-12-16
Abstract: In preparing meat for marketing, the muscular masses are removed from the carcass while it still retains its animal heat and are then, after, if desired, systematic separation from one another, subjected to chilling to remove animal heat.  The chilling is effected when the meat is in relaxed position and not, as in the ordinary method, under tension.  Bone free cuts are obtained.
Patent GB-1164846-A (GB)
Title: Improved De-Watering Apparatus for Machines for the Manufacture of Webs of Paper or other Fibrous Material
Inventor: OBERDORFER HANS
IPC: D21F1/48
Filed: 1966-08-26
Abstract: 1,164,846. Drying. H. OBERDORFER. 26 Aug., 1966 [30 Aug., 1965], No. 38504/66. Heading F4G. [Also in Division D2] Water is removed from a web S on a wire L of a Fourdrinier paper-making machine by air blown through hoods 17 arranged in foraminous rolls 100-102, a wire screen 103 being arranged around rolls 100 and 101.
Patent GB-813557-A (GB)
Title: A pneumatic take-up device for a circular knitting machine
IPC: D04B15/92
Filed: 1956-12-18
Abstract: 813,557. Knitting-machines. FIDELITY MACHINE CO. Dec. 18, 1956 [Dec. 27, 1955], No. 38550/56. Class 74 (2). A pneumatic take-down device in a circular machine comprises a blower 34 which forces air through ducting 32, 28 into the annular space between inner and outer tubes 14, 11 positioned within the needle cylinder of the machine. The outer tube 11 carries a deflecting flange 16 on its inner face which directs the air from the blower around the top edge of the inner tube so that it impinges in a downward direction on the outer surface of the knitted tube extending from the needles down within the inner tube 14. The fabric knitted is thereby withdrawn from the needles as it is knitted and on completion is blown through further ducting 35 into a receptacle 36. A gap is left between the lower end of the inner tube 14 and the ducting 35 to permit inspection of the fabric. Fins 24 are positioned on the inner face of tube 11 at its upper end and serve to hold the fabric centrally of the tubes as it twists down within them.
Patent GB-1272076-A (GB)
Title: Products in the form of foamed threads or foamed strands of polypropylene
IPC: C08J9/00
Filed: 1969-08-01
Abstract: 1,272,076. Foamed polypropylene filamentary materials. SALEEN G.m.b.H. & CO. 1 Aug., 1969 [3 Aug., 1968], No. 38603/69. Heading B5B. [Also in Division C3] Foamed polypropylene filamentary materials consist of a foamed stereoregular propylene polymer mixture which consists of a relatively low proportion by weight of one or more heptane-soluble, low molecular weight propylene polymers having an average molecular weight not exceeding 100,000 and selected from propylene homopolymers, copolymers and graft polymers, and a relatively high proportion by weight of one or more higher molecular weight propylene polymers selected from stereoregular propylene homopolymers, copolymers and graft polymers as the main constituent, optionally admixed with one or more further low molecular weight and heptane-soluble polymers compatible with the propylene polymers, and having an average molecular weight not exceeding 100,000. The propylene polymer mixture may be formed by gas phase polymerization and may still contain catalyst residues. The foamed stereoregular propylene polymer mixture may have an average molecular weight above 600,000 and may be derived from a non-foamed propylene polymer having the following parametres: (a) number average molecular weight Mn of 125,000, (b) a weight average molecular weight of 1,151,000, (c) a distribution of molecular weight (#Mw/)#Mn - 1) of 8.2 and density (before being formed into filamentary material) below 0.90. The average molecular weight of the foamed stereoregular propylene polymer mixture may be from 700,000 to 1,200,000. The filamentary material may consist of a propylene polymer mixture having a wide distribution of molecular weights and consist of from 5 to 35% by weight of heptane-soluble, low molecular weight propylene polymer material containing atactic and isotactic fractions having an average molecular weight of 10,000 to 100,000, together with from 95 to 65% by weight of higher molecular weight stereoregular propylene polymer material. The filamentary materials may be formed by extruding a mixture of the polymers and a 5-10 carbon atom liquid hydrocarbon as the expanding agent at a temperature between 170‹ and 220‹ C., and stretching the extrudate as soon as it issues from the extruder die without heating or compressing the extrudate. The extrudate may be stretched at a stretch ratio of from 2 : 1 to 18 : 1, preferably to 16 : 1.
Patent GB-1391367-A (GB)
Title: Synthetic terrain covering
IPC: E01C13/12
Filed: 1972-08-21
Abstract: 1391367 Recreational surface coverings R H MOSHER [trading as R M ASSOCIATES] 21 Aug 1972 [7 Sept 1971] 38943/72 Heading A6D [Also in Division E1] A surface covering comprises a plurality of irregular, thin, curved, peripherally irregular thermoplastics platelets, each having a maximum dimension of between “ of an inch and 2 inches. Such a covering is preferably prepared by scattering the remains of comminuted plastics bottles on the surface, but other comminuted plastics material or specially moulded platelets may be used. The peripheral irregularities serve to mechanically interlock the platelets to prevent shifting of the covering. Although primarily intended as artificial snow the covering may be used on wet or muddy roads or the like.
Patent GB-963589-A (GB)
IPC: B29C43/18
Filed: 1960-11-14
Abstract: 963,589. Making collapsible tubes; seaming non-metallic sheet material. V. FLASE. Nov. 14, 1960 [Nov. 18, 1959], No. 38998/60. Headings B5A and B5K. In a method of making a tubular container, a preferred end-piece 1 (Fig. 6) of thermoplastic material consisting of a disc with a central delivery nozzle is located within the end portion of a tubular body element 6 also of thermoplastic material and of larger diameter than the end-piece, and the peripheral zone of the endpiece is subjected to heat and axial pressure whereby the zone is reduced in thickness and increased in diameter, and caused to weld to the body element. In Fig. 6, the end-piece 1 is mounted on a metallic core 2 with the tubular element 6 disposed round the core and supported thereon by a shoulder (not shown). Above the core is a hood or mould of insulating material 9, 10 with a metallic insert 7 to serve as the welding tool. The end-piece 1 and member 6 are mounted on the core when it is in a lowered position with respect to the hood, and the upper end 11 of the body member 6 is heated. The core is then raised to reach the position shown where the end 11 of the member 6 has been bent over to engage with the shoulders of the end-piece 1. Further upward movement of the core combined with H.F. heating of the parts using the insert 7 and core 2 as electrodes will cause the end-piece to weld to the body member to give a smooth exterior surface. In an alternative embodiment, the body member is not bent over, but the end-piece is subjected to heat and axially directed pressure, whereby it is reduced in thickness and increased in diameter to engage with the body member 6 and to weld to it. The invention may be made to work continuously by using a plurality of cores and moulds mounted on a circular table (Fig. 10, not shown), the various operations described being carried out automatically.
Patent GB-874672-A (GB)
Title: Improvements in electrical insulation testers
Inventor: EVERETT REGINALD EDGAR
IPC: G01R27/02
Filed: 1957-12-16
Abstract: 874,672. Resistive measurements. EVERETT, EDGCUMBE & CO. Ltd. Dec. 16, 1958 [Dec. 16, 1957], No. 39063/57. Class 37. An insulation tester comprises a battery energized transistor oscillator A which feeds output terminals O, O through step-up transformer T and rectifier D<1>; and a currentmeasuring instrument M for indicating the output from terminals O, O when connected across the insulation to be tested. Resistors R1, R2 connected across battery B1, have their junction point connected by way of variable resistor R3 and transformer primary T2 to the transistor base; the coupling between the two transformer primaries T1, T2 being arranged to induce an oscillating voltage which is stepped up by transformer T, rectified by D1, and smoothed by capacitor C1 across which non-linear and linear resistors R4, R4<1> are connected for voltage control. The D.C. instrument M is calibrated directly in ohms, corresponding to a constant 500 v. output across O, O. Switch S2 provides circuit changes as follows: Position 1 enables voltage adjustment to be made before testing insulation. The battery is connected to the oscillator through S1, and the output is fed to terminals O, O which are shunted by resistor R9. Resistor R3 is adjusted until meter M indicates the known value of R9. When S1 is opened, any residual voltage across O, O is discharged through R10. In position 2 of switch S2, R9 is switched out of circuit with terminals O, O which are applied across the insulation to be tested. In position 3 of switch S2, the oscillator A is disconnected; the battery being connected through resistors R5, R6 across terminals O, O; and meter M being shunted by resistor R7; whereby low resistance testing may be carried out, the instrument functioning as a battery ohmmeter. In modifications, a printed circuit may be used, and full-wave rectification may be provided in place of the half-wave rectifier D1.
Patent GB-351438-A (GB)
Title: Manufacture of cellulose ester silk
IPC: D01F2/28
Filed: 1929-12-20
Abstract: Cellulose aceto-propionates, butyrates, &c.-Cellulose ester silks stable to boiling, soaping and alkali, are obtained by spinning an ester containing in addition to acetic acid, about 0,2 mol. or more of a fatty acid of molecular weight higher than acetic per mol. of cellulose ester.  The silk is capable of being dyed in a boiling bath.  In examples, (1) a cellulose aceto-butyrate, prepared by treating cellulose with a mixture of chloracetic, acetic and butyric acids and phosphorus pentoxide, is dissolved in acetone, to form a 25 per cent solution which is filtered, and worked up by known spinning processes; (2) a cellulose aceto-propionate, prepared by treating cellulose under pressure with a mixture of propionic acid, acetic anhydride, liquid sulphur dioxide and sulphuric acid, is dissolved in 5 : 1 acetone-alcohol to form a 25 per cent solution which is filtered and worked up.
Patent GB-1148200-A (GB)
Title: Non-catalytic thermal hydrodealkylation process
IPC: C07C15/02
Filed: 1967-08-25
Abstract: 1,148,200. Thermal hydrodealkylation. MITSUBISHI PETROCHEMICAL CO. Ltd. 25 Aug., 1967 [8 Sept., 1966], No. 39288/67. Heading C5E. A process for the non-catalytic thermal hydrodealkylation of alkyl aromatic hydrocarbons comprises preheating hydrocarbon feed oils with hydrogen and passing the preheated mixture through at least two reaction zones, the first being a back-mixing-type reactor and the subsequent reaction zone being a piston flow-type reactor. Hydrogen may be used in amount 2-10 mols per mol of alkyl aromatic in the feed, the temperatures in the reaction zones may be 580 to 800 C. and the pressure 1 to 60 kg./cm.<SP>2</SP> (gauge).
Patent GB-881327-A (GB)
Title: Improvements in or relating to thread winding machines
IPC: B65H67/08
Filed: 1957-12-18
Abstract: 881,327. Winding yarns. REINERS, W. Dec. 18, 1957 [Dec. 24, 1956], No. 39321/57. Class 120(2) An automatic thread winding machine of the kind including means to deliver replacement cops to a cop unwinding station means to present the end of the cop thread and the end of the package being wound to a knot tying device and suction means to unwind and retain an end portion of the thread on the cop before the cop is delivered to the unwinding station such that when the cop reaches the unwinding station the thread end is in a position to be grasped by the means for presenting it to the knot tying device, in which each supply cop is wound with a nose cone, comprises means to position the cops individually in the zone of operation of the suction means and a member which in said position of each cop is contacted by the nose cone thereof thus to limit the length of thread unwound by the suction device. In the arrangement shown 1 designates a magazine containing a number of supply cops 3 which are delivered one at a time to an unwinding station under the control of a rockable fork shaped member 2. The cop in the lowermost position 3a in the magazine is so positioned that the top of the cop tube is adjacent a suction nozzle 4. Depending from the nozzle 4 is a member 5 which contacts the cone of thread on the cop 3a and prevents excessive unwinding of thread therefrom. The member 5 may be simply an extension from the nozzle, a leaf spring attached to the nozzle or may be separate from the nozzle. Specification 855,958 is referred to.
Patent GB-340411-A (GB)
Title: Improvements in or relating to wire wheel constructions
IPC: B60B1/02
Filed: 1929-12-24
Abstract: 340,411. Wire wheels. BUDD WHEEL CO., 25th Street, Philadelphia, U.S.A.- (Assignees of Begg, R. S. ;Indianapolis, Indiana, U.S.A.) Dec. 24, 1929, No. 39443. Convention date, Jan. 16. [Class 144 (i).] A wire wheel construction comprises a hub shell barrel 17 and an attaching member 18 which are integrally united as by arc welding at the edge 25. The member 18 comprises a radial flange 24 which is apertured for the attaching bolts and nuts 13, 16, and a cylindrical flange 23 which is telescoped into the barrel against a shoulder 23<1> thereon. The barrel 17 is of a diameter greater than that of the nut and bolt ring and has a cap 26 secured by spring lugs 27. The area where the member 18 and barrel 17 overlap, provides a reinforced zone for anchoring the inner set of spokes 21. The members 17, 18 may be formed from rolled stock, cut to length, bent into a circle, and welded.
Patent GB-1190935-A (GB)
Title: Improvements in and relating to the Production of Isopropenyl Acetate
Inventor: WELLS HAROLD EWART
IPC: C07C69/14
Filed: 1966-09-05
Abstract: 1,190,935. Purification of isopropenyl acetate. COURTAULDS Ltd. 4 Sept., 1967 [5 Sept., 1966], No. 39567/66. Heading C2C. Isopropenyl acetate, obtained by reacting ketene and acetone in the presence of sulphuric acid as catalyst, is purified by either adding water to the crude reaction product and then heating the resulting mixture to distil off the acetone, or heating the crude reaction product first to distil off the acetone and then adding water to the residual mixture, heating the resultant mixture to distil off an azeotrope of isopropenyl acetate and water, allowing it to separate into two layers and distilling the isopropenyl layer. The process may be continuous.
Patent GB-1536535-A (GB)
Title: Drawers and the like
IPC: A47B88/00
Filed: 1975-12-11
Abstract: 1536535 Drawers L B (PLASTICS) Ltd 11 Dec 1975 [11 Sept 1974] 39577/74 Heading A4B A drawer has opposed, moulded plastics side walls 10, 11 each provided on its outer face with a plurality of longitudinally extending ribs 17-20 forming channels 21A, 21B, 21C which are open at their rear ends whereby the drawer may be mounted by sliding engagement of a fixed runner in one channel 21 A or by engagement of rollers in the other channels 21B, 21C, and includes projecttions 24 or the inner faces of the side walls 10, 11 engage in the hollow ends 25 of an extruded plastics back wall 12. The projections 24 are retained by engagement of detents 24 in apertures 27. The projections 24 may be additionally secured by adhesive, welding or pinning.
Patent GB-830817-A (GB)
Title: Spinning solutions of polyacrylonitrile
IPC: C08F20/44
Filed: 1957-12-20
Abstract: Spinning solutions of polyacrylonitrile or an interpolymer containing a preponderant proportion of acrylonitrile are made by polymerizing the acrylonitrile, optionally containing a minor proportion of an interpolymerizable monomeric material, in an organic solvent, e.g. carbon tetrachloride or 1,2-dichloroethane, which dissolves the monomer but not the polymer, adding after the polymerization is completed a solvent which dissolves the polymer and removing the organic solvent which dissolves the monomer but not the polymer.  In the example acrylonitrile and methyl acrylate are interpolymerized in solution in carbon tetrachloride with azoisobutyronitrile as catalyst, dimethyl formamide is added to the reaction mixture and the carbon tetrachloride distilled off under reduced pressure.
Patent GB-1207553-A (GB)
Title: Improvements in current limiting arrangements for motor control systems
IPC: H02P7/292
Filed: 1968-08-21
Abstract: 1,207,553. Automatic control systems. GENERAL ELECTRIC CO. Aug. 21, 1968 [Sept.29, 1967], No.39890/68. Heading G3R. In a retroactive motor speed or torque control system wherein a motor 10 is fed from a polyphase A. C. supply by a plurality of controlled rectifiers indicated schematically at 48, current limiting is applied by means of circuitry having substantially no time constant so that it may depend upon instantaneous value of armature current and the resultant average current during limiting is a function of the time constant of the armature circuit. The limit level is predetermined by a Zener diode 80 and the position of slider 78. When the signal from current-sensing means 68 exceeds the pre-set value transistor 82 is immediately turned on and blocks amplifier 62 feeding pulse generator 64, which is of the type that can immediately discontinue the firing of additional controlled rectifiers in the module 48. When the instantaneous value of armature current falls to the predetermined level the transistor 82 is turned off and pulse generator 64 immediately fires those forward biased controlled rectifiers which would have been fired but for the operation of the current limit circuit 66. Referring to Fig. 2, the predetermined current level is indicated by line 92 and the curve 88 indicates the manner in which the current can increase if not controlled. The transistor 82 is turned on, and amplifier 62 turned off, at the point 94, and the rectifier which would have fired at point 96 is not fired till the armature current has decreased (dotted line) to point 98. The instantaneous current then again increases above the level 92, as at point 100 where the firing of controlled rectifiers is again held off until the current decreases to point 102, at which time they are immediately fired. Thus the limited current follows the dotted curve 90. A phase control circuit suitable to form part of a pulse generator 64 (whereby amplifier 62 need not charge a capacitor to become effective) is described, Fig. 3 (not shown) and uses a unijunction transistor (110) as in Specification 1, 202, 603. A system using three-phase full-wave bridge-connected silicon controlled rectifiers is described, Fig. 4 (not shown) which, in addition to current limiting as above, is provided with lockout circuits (171, 172) preventing simultaneous firing of rectifiers in the bridge circuits for forward and reverse or regenerative operation of the motor 10.
Patent GB-1055942-A (GB)
Title: Vehicle having a driving speed independent of the speed of the driving motor
IPC: B60K17/10
Filed: 1963-10-10
Abstract: 1,055,942. Change-speed control. ALLM€NNA SVENSKA ELEKTRISKA A.B. Oct. 10, 1963 [Oct. 17, 1962], No. 39932/63. Heading F2D. In a vehicle having a variable speed engine and a variable ratio transmission, the ratio of the transmission is so controlled that its output speed is substantially independent of the engine speed. As shown, a vehicle has a variable speed engine 1 driving road wheels 10 through an hydraulic transmission having a variable displacement pump 3 and a motor 6. The pump displacement is adjusted by a lever 11 connected to a moving cylinder 12 co-operating with a fixed piston 14, a servo valve 13 being mounted on the cylinder 12 and being adjusted through levers 17-19 from a pedal 20. Lever 18 pivots about an adjustable fulcrum 26 which is linked through a bell-crank lever 24 to a pedal 23 which adjusts an engine speed-control lever 21. In operation, pedal 20 is positioned to give a desired output speed, and actuation of pedal 23 to vary the engine speed adjusts the position of fulcrum 26 and hence adjusts the servo valve 13 and servo cylinder 12 to vary the pump displacement to maintain the output speed constant. The engine also drives a pump 29 supplying ancillary devices, for example a lifting fork of the vehicle. In the embodiment of Fig. 2 (not shown), a variable speed engine 1 drives a variable displacement pump 3 driving a motor 6, and a flow meter 32 is connected to one of the pressure medium conduits. The flowmeter 32 is connected to a device 33 converting the flow value to an electric signal which is applied to a signal comparing means 35 which also receives reference signals from a signal transmitter 36 controlled by a pedal 20 and giving the desired value of the output speed. The signal comparing means 35 gives a control signal which is fed through an amplifier 37 to a device such as a solenoid actuating the servo value 13 of the servo cylinder 12. Any difference between the actual value and the desired value of the speed thus actuates the valve 13 to vary the displacement of the pump 3. The output speed is thus dependent upon the position of the pedal 20 and is indepedent of the engine speed. As an alternative an output speed-sensing device 32a may be connected directly to one of the output shafts or to some other mechanical part of the transmission. In this case the device 32a will supply a signal to the means 35. In a modification (Fig. 3, not shown), the flowmeter 32 supplies a pressure signal dependent upon the flow magnitude through a line 32<SP>1</SP> to a chamber 43 to act upon a piston 42 controlling the servo valve 13. The piston 42 is controlled by the pedal 20 acting through a rod 20<SP>1</SP> and a spring 40 on the piston 42.
Patent GB-1377168-A (GB)
Title: Baby carriages or perambulatos
IPC: B62B5/06
Filed: 1971-11-22
Abstract: 1377168 Preventing theft of prams J J HOWARTH and W B DAUBNEY 22 Nov 1971 [21 Aug 1970] 40291/70 Heading B7J [Also in Division F2]  A lever 11 operable to release the spring applied brakes of a perambulator (see Division F2) may be locked in a position where the brakes are applied to prevent the brakes being released by an unauthorized person : a padlock 19 is utilized and the padlock 19 passes through holes in the lever 11 and a fitting 10 on the permabulator handle 15.