baber/WOPTO huggingface dataset:
Patent GB-1279533-A (GB)
Title: Direct current reduction network for amplification telephone sets
Inventor: PERSON JEAN-MICHEL
IPC: H04M19/00
Filed: 1970-03-12
Abstract: 1279533 Automatic exchange systems; transistor gating circuits J M PERSON 12 March 1970 [12 March 1969 9 March 1970] 11819/70 Headings H3T and H4K A direct current reduction network for insertion in the line pair connecting an amplifying station (requiring only low current for operation) to an exchange (requiring higher current levels before off-hook is recognized comprises a network having two pairs of terminals each pair being connected by a resistor having the emitter base path of a corresonding transistor connected in parallel with it, the two transistors being controlled such that if current flows in one or other direction through the subscribers loop, one or other of the transistors conducts to connect an impedance across the line pair. The impedance may be a resistor which may be non-linear and may have a negative resistance characteristic or may be a two terminal impedance network e.g. as shown in Fig. 5 having a low impedance (mainly due to the resistor 31 with transistor 35 conducting) to direct current and a high impedance (mainly due to resistor 34) to alternating current. In one form shown in Fig. 4, the four terminal network 10011 is inserted in a subscribers line pair adjacent the line circuit. When the substation instrument is on hook no current flows in the subscribers loop 1a, 2a and no potential drop exists across resistors 11 and 21 and transistors 12 and 22 are blocked and no current flows in the line pairs 1c, 2c on the exchange side. Below a predetermined level of current Ia in the line loop the transistors remain blocked and this current Ia equals the current Ic on the exchange side. Above the predetermined level of current in the subscriber loop one or other transistor switches to conduction, depending on the direction of current, connecting an impedance 30 across the line pair via diodes 18 and 27 or 28 and 17 and the conducting transistor. The current Ic is now the sum of the current Ia and the current through the impedance and by suitable choice of impedance can be arranged to be at a sufficient level to operate the off-hook detector at the exchange. In other embodiments (Figs. 1 and 3, not shown) impedance network 30 and diodes 17 and 27 are replaced by a resistor connected between the collectors of the transistors and diodes arranged similarly to diodes 18 and 28 connect each line 1c and 2c to the collector of the transistor connected to that line. In one form capacitors in parallel with resistors provide a speech by-pass and inductors prevent passage of speech through the impedance.
Patent GB-330694-A (GB)
Title: Improvements in or relating to tramcar, omnibus and like seats
IPC: B61D33/00
Filed: 1929-04-17
Abstract: 330,694. Forster, R. E. April 17, 1929. Reversible seat.-In a reversible seat of the kind comprising a seat proper c which is moved rearwardly and tilted as the back is thrown over, through the medium of levers e, k, the rails d have rounded ends d' running on supports b, while the lengths of the said rails and of the arms of the levers k pivoted thereto are such that the seat is retained firmly on its supports at all times and without any loose play. Rollers h may be provided on the supports b.
Patent GB-1454583-A (GB)
Title: Adosrptive separation of aromatic isomers with adsorbents containing an alcohol substrate
IPC: C07C67/00
Filed: 1974-03-18
Abstract: 1454583 Selective adsorption UOP Inc 18 March 1974 [19 March 1973] 11873/74 Heading C5E The para isomer is separated from a mixture of bialkyl monocyclic aromatic hydrocarbons by selective adsorption on a type X or Y yeolite which contains an alcohol substrate, followed by desorption using a desorbent. The alcohol is preferably a C 1 -C 6  alcohol which does not readily dehydrate to the olefin, e.g. 1-butanol or 2-methyl-1-propanol, and may be used in amount 0À1-8 wt. per cent of the adsorbent. The examples describe the separation of pxylene from a C 8  aromatic stream using diluted benzene as desorbent.
Patent GB-527752-A (GB)
Title: Improvements in steel shelving
IPC: A47B57/58
Filed: 1939-04-20
Abstract: 527,752. Metal shelving. THOMAS, B., and THOMAS, E. April 20, 1939, No. 11877. [Class 52 (i)] A partition for metal shelving is provided with a vertical flange 2 at its inner end at right angles to its plane and extending slightly beyond the partition, the flange being provided with a projecting tongue 3 engaging a slot 9 formed by a bent strip of metal carried by the frame of the shelving. The partition is secured to the shelf 10 by a hook bolt 6 held by a nut 7. The flange may be secured rigidly to the partition or as shown pivoted on a bolt 4 to assist its engagement with the slot 9.
Patent GB-1339507-A (GB)
Title: Curable fluoroelastomer compositions
IPC: C08K13/02
Filed: 1971-04-28
Abstract: 1339507 Curable fluoroelastomer compositions E I DU PONT DE NEMOURS & CO 28  April 1971 [28 April 1970 22 March 1971] 11927/71 Addition to 1300782 Heading C3P A curable fluoroelastomeric copolymer composition as defined in claim 1 of Specification 1,300,782 wherein: (A) (i) the dihydroxylic aromatic compound is a dihydroxybenzene, dihydroxynaphthalene or dihydroxyanthracene substituted with one or more substituents selected from bromine, carboxyl and acyl or (ii) the dihydroxylic aromatic compound is a bisphenol of the general formula wherein (a) at least one of the hydroxyl groups is not para to the group A and x is 0 or 1; and/or (b) the group A is selected from difunctional, aliphatic, cycloaliphatic or aromatic groups having 11 to 13 carbon atoms, thio, oxy, carbonyl, sulphinyl or sulphonyl groups; or (iii) the dihydroxylic aromatic compound is replaced at least in part by a tri- or tetrahydroxy-substituted benzene, naphthalene or anthracene, or by a bisphenol of the general formula wherein A is a difunctional aliphatic, cycloaliphatic or aromatic group of 1 to 13 carbon atoms, or a thio, oxy, carbonyl, sulphinyl or sulphonyl group; and x is 0 or 1; and/or (B) the divalent metal oxide is replaced at least in part by a divalent metal hydroxide or a mixture of a divalent metal oxide and/or hydroxide with a metal salt of a weak acid, the salt not being barium carbonate, calcium carbonate or calcium silicate when a divalent metal oxide alone is employed. In the examples the compositions comprise a vinylidene fluoride/hexafluoropropylene copolymer, magnesium oxide, calcium hydroxide, carbon black, 2-dodecyl-1,1,3,3- tetramethylguanidine absorbed on silica, hydroquinone and 4,4<SP>1</SP>-dihydroxy diphenyl sulphone and are press-cured and post-cured.
Patent GB-1098628-A (GB)
Title: Improvements in or relating to advancing roof supports
Inventor: KIBBLE JOHN DUNBAR
IPC: E21D23/00
Filed: 1964-03-20
Abstract: 1, 098, 628. Mine roof supports. COAL INDUSTRY (PATENTS) Ltd. March 16, 1965 [March 20, 1964], No. 11932/64. Addition to 967,163. Heading F1P. A mine roof support has a hydraulic roof support member 2 and a horizontal advancing ram 1, a control valve 6 actuated by pressure acting on the ram 1 from a supply 3 to lower the member 2 by allowing fluid to escape from it to a return line 4, and a second control valve 8 actuated at a predetermined positional setting of the ram, e.g. by an abutment 18 on the ram engaging the valve, to over-ride the valve 6 to raise the member 2. The operation is started by opening a valve 5, and fluid-pressure then opens the valve 6, and advances the ram 1. When the valve 8 is opened, the pressure is transmitted along a line 9 to close the valve 6, and through a non-return valve 11 to raise the member 2. The valve 8 and abutment 18 may be replaced by an opening in the ram cylinder, connected to the lines 9 and 12 and uncovered by the piston near the end of its stroke. The valve 5 may be opened by fluid-pressure, e.g. from the line 9 of an adjacent unit, the units then operating sequentially Fig. 2 (not shown). In another embodiment Fig. 3 (not shown) the line 9 leads through a two-way fluid-pressure operated valve to the valves 5 of an adjacent unit on each side and the units are operable sequentially either from left or right or right to left. Reference has been directed by the Comptroller to Specification 967,164.
Patent GB-1107804-A (GB)
Title: A method for recovering fat and meat meal from animal raw material
IPC: A23J1/02
Filed: 1966-03-18
Abstract: In a process for recovering fat and meat meal from animal raw material, the raw material is boiled by indirect heating and the boiled material is separated into glue water and solids and thereafter fat is separated from the glue water and the solids are dried; glue water freed from fat is supplied to the boiler inlet; and glue water freed from fat is also supplied directly to the step in which the boiled material is separated into solids and glue water, so that the glue water supplied to the latter step is used for washing out the fat from the solids without imposing any additional load on the boiler.  The fat-free glue water may be supplied from an external source or recirculated from the process. There may be an evaporator between the boiler and the separating stage and fat-free glue water may be supplied to this also.
Patent GB-751534-A (GB)
Title: Light metal piston with reinforcement
IPC: F16J9/22
Filed: 1954-04-26
Abstract: 751,534. Pistons. WHITFIELD, M. G. April 26, 1954 [May 7, 1953], No: 12039/54. Class 122(1) [Also in Group XXII] A piston of light metal is reinforced at the ring belt with heavy metal 1 of sinuous form which is embedded in the light metal. The reinforcement may be incorporated by casting light metal on to it and a part of the piston which was previously formed by casting or forging (see Group XXII); alternatively, the entire piston may be cast about the reinforcement which may be pre coated to facilitate adhesion of the light metal. The piston may be of aluminium or aluminium alloy and the reinforcement of iron or steel of circular or other section which may be stamped or cut from sheet metal. Ring grooves 18, 19 may be cut through the reinforcement which may be bent at 6b to lock the pieces of reinforcement in the land between the grooves. A plurality of sinuous reinforcing rings may be used to cover the length of the ring belt. and the rings may comprise a plurality of sections which may extend only over two areas of the circumference of the piston, each of about 120 degrees and located with its centre on an axis perpendicular to the gudgeon pin. In the construction shown in Fig 7. the reinforcing ring is of elongated helical form. In a further construction, Fig. 11, the ring groove is arranged to intersect the crests of adjacent reinforcing rings 26, 27.
Patent GB-883528-A (GB)
Title: Improvements in and relating to electric transformer tap changing systems
Inventor: SOMMERSCHIELD JOHN GRAHAM
IPC: H01F29/04
Filed: 1957-04-12
Abstract: 883,528. Transformers. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. April 11, 1958 [April 12, 1957], No. 12069/57. Class 38 (2). [Also in Group XXXVII]. In an on-load tap changing system for a transformer two. paths are provided between each tapping and the load, one path including a resistance R, a portion of which is inserted successively between tappings and in series with the load during tap changing, thus limiting inter-tap currents and providing additional steps. Each tapping point T1 ... T3 has two off-load contactors S1 S6 and may be connected to the load terminal L2 by an-load contactors X, Y. If, for example, tapping T1 is in use S2 and Y only are closed. To change to T2, first S3 is closed, then X, thus inserting a portion of R between T1 and T2. Then Y is opened, followed by S2 so that T2 then supplies the load via the portion of R, and the output voltage increases. Finally S4, then Y are closed, and X and S3 opened, so that the output voltage further increases to that of T2. The transformer and resistance tappings may be chosen so that each increment of added voltage is greater than the preceding one. Fig. 3 (not shown) illustrates an arrangement wherein two D.C. traction motors, or groups of motors, are supplied through a bridge rectifier from a centre-tapped transformer, the centre tap being connected to a neutral point of the motor circuit and each half of the transformer having the tap-changing system described. Specification 770,614 is referred to.
Patent GB-827891-A (GB)
Title: Electric accumulators
Inventor: GARTEN WILHELM
IPC: H01M4/76
Filed: 1957-04-12
Abstract: 827,891. Batteries. ACCUMULATORENFABRIK A.G. April 12, 1957, No. 12106/57. Class 53. The lower ends of the porous tubes 1 and spines 3 of an accumulator plate are embedded in a mass of thermo - setting synthetic resin 2 which is cast in a mould 6. The lower ends of the spines may be provided with enlargements 5 or with grooves or recesses.
Patent GB-679097-A (GB)
Title: Improvements in and relating to potters' lathes
IPC: B28B1/02
Filed: 1951-05-24
Abstract: 679,097. Throwing and turning pottery. ELLIS, A. G., LEAK, J. E., and COLCLOUGH, H. May 24, 1951, No. 12136/51. Addition to 654,306. Class 87(i) In a potter's lathe as described in the parent Specification in which the work is rotated about a vertical axis and is operated by a profile tool moving tangentially thereto. the tool 54 is inclined at an angle X to its direction of advance B and is, depending on the shape of the work A, inclined to or parallel with the axis of rotation of the work so as to engage the work progressively from its upper end, 54a. The tool is adjustably mounted on its carrier.
Patent GB-111284-A (GB)
Title: Improvements in or relating to Power Transmission Devices.
Inventor: RENAULT LOUIS
IPC: F16D43/18
Filed: 1917-08-25
Abstract: 111,284. Renault, L. Nov. 6, 1916, [Convention date]. Turning-gear.-A device which enables one shaft to drive a second shaft at a reduced speed until the second shaft exceeds a determined speed, and then causes the second shaft to drive the first without a reduction of speed, is described as applied to motor-dynamos for lighting and starting the engines of motor-vehicles and is of the kind in which the said shafts 3, 12 are independently rotatable and respectively carry sun-pinions 4, 12<1> gearing with planet-pinions 5, 6 fast on a shaft 7 mounted in a revoluble drum 10. When the dynamo-electric machine 1 is started as a motor, an electro-magnet is energized which causes a brake band 20 to hold the drum 10 stationary and a reduced drive is transmitted to a pinion 13 gearing with the engine. When the engine is started, the brake 20 is released and centrifugal balls 17 carried in a frame fast on the shaft 12 causes a split band 18 to grip the drum 10 and rotate it, thereby transmitting engine speed to the dynamo.
Patent GB-1294461-A (GB)
Title: Method and apparatus for weight measurement
Inventor: FOLKES H L
IPC: G01G17/02
Filed: 1969-03-08
Abstract: 1294461 Weighing apparatus DUNLOP HOLDINGS Ltd 6 March 1970 [8 March 1969] 12334/69 Headings G1N G1W In apparatus for measuring weight per unit length of flexible elongated articles, e.g. conveyer belting, or plastics or rubber sheeting, or for measuring loads carried by conveyers, the effects of longitudinal tension in the article on two load sensing devices are arranged to cancel out. The belt or sheet 10 passes over support rollers 11, 13, 15 spaced so that two different predetermined lengths L1, L2 are associated with respective load sensing rollers 12, 14, the roller 11-15 being arranged so that the components of the tension-produced forces acting along the measurement axes of load cells 20, 21 associated with the rollers 12, 14 are equal. Two load cells are provided for each of rollers 12, 14, their electrical outputs being averaged by circuits 25, 27. The difference between the averaged outputs is a function only of the weight of a length (L2-L1) of the article 10, and may control an indicator 30 or recorder 31. If the measurement axes of the load cells are not parallel, this can be allowed for by the circuits 25, 27, 28. The support rollers 11, 15 can be moved to check for faults in the measuring devices. The output from the difference circuit 28 may be compared with a predetermined value in a control mechanism for automatically maintaining a required sheet thickness in manufacture. The apparatus is not suitable for weighing conveyer loads comprising large discrete articles.
Patent GB-443526-A (GB)
Title: Improvements in or relating to typewriters, calculating and like machines having platens displaceably mounted in a paper carriage
IPC: B41J11/14
Filed: 1935-04-24
Abstract: 443,526. Typewriters &c. WANDERER - WERKE VORM. WINKLHOFER & JAENICKE AKT.-GES., Sch÷nau, near Chemnitz, Germany. April 24, 1935, Nos. 12340 and 12341. Convention dates, April 24, 1934 and April 18, 1935. [Class 100 (iv)] Platen-shift mechanism.-In mechanism comprising a platen carried by a shift-frame which is mounted on links on the carriage, yielding of the platen when struck by the types is prevented by means of co-operating abutments arranged on the shift-frame and carriage at approximately the same level as the platenshaft. In the mechanism shown in the Figure, the shift-frame 2, mounted on links 4, 5 on the carriage 3, is provided at each end with a roller 6 which is arranged at approximately the same level as the shaft of the platen 1, and abuts on the face 8 of a bracket 7 adjustably secured to the carriage. Alternatively, the rollers and brackets may be mounted on the carriage and shift - frame respectively. To reduce friction, the rollers may be arranged to come into firm contact with the faces in the normal and shift positions only. The brackets may have lugs 8<a> for limiting movement of the shift-frame when the carriage is removed from the machine. The rollers may be arranged, when the shift-frame returns to normal position, to engage stops 30 preferably consisting of felt or the like or layers of leaf-springs carried by an adjusting-screw 27. Similar stops may be provided for limiting the upwards movement of the shift-frame.
Patent GB-474453-A (GB)
Title: Improvements relating to loading apparatus for vehicles
IPC: B60P1/26
Filed: 1936-05-02
Abstract: 474,453. Refuse vehicles. SHELVOKE & DREWRY, Ltd., and EDWARDS, C. K. May 2, 1936, No. 12515. [Class 108 (i)] [Also in Group XXX] In apparatus for loading solid or pasty material into a tank or receptacle on a vehicle, comprising a loading hopper and a ramming device carried by the rear door of the receptacle which can be swung rearwardly to allow the material to be discharged, such as described in Specification 424,396, [Group XXX], the part of the door carrying the hopper and ramming device is made movable upon the remainder of the door towards and away from the door hinge. In the embodiment shown, the receptacle 12 which may be tipped about an axis 14 by a ram 16, is provided with a discharge door 18, 20, the part 18 of which is hinged at 22 to the receptacle, and the lower part 20 carrying the hopper 26 and ramming apparatus at 28 being hinged to the part 18 at 24. The door is normally locked by slidable wedges on the receptacle engaging slotted lugs 56 on the door. When tipping commences, these wedges are withdrawn by relative movement between rollers 74 on the receptacle and cams 76 on the chassis. Subsequent tipping causes the cable 32 to tilt the part 20 of the door about the hinge 24 until it engages stops 84 on the part 18, when the whole door pivots about the hinge 22. Initial slack in the cable 32 is taken up by pulleys 42 mounted on spring-controlled arms 44. The part 20 of the door may be arranged to slide upon the part 18.
Patent GB-1026909-A (GB)
Title: A method of separating pure phthalic anhydrine from an oxidised ú´-xylene reaction product
IPC: C07D307/89
Filed: 1965-03-24
Abstract: Phthalic anhydride, which has been produced by oxidation of o-xylene, is purified by a three-stage distillation process carried out under reduced pressure.  In the first stage, the impure phthalic anhydride is submitted to simple equilibrium distillation to distil over the bulk of the input leaving non-volatile impurities in the still.  In the second stage, the distillate from the first stage is distilled in a rectification column and 0.5 to 5% of the input is withdrawn overhead.  In the third stage, the sump liquid from the second stage is submitted to simple equilibrium distillation and the purified phthalic anhydride product is obtained as distillate.  The pressure in the last stage is preferably about 8 mm. Hg; the first two stages may be carried out at a pressure between 100 and 200 mm. Hg.  The reflux condenser of the second stage and the total condensers of the other two stages are maintained at temperatures above the melting point of phthalic anhydride, i.e. at a temperature exceeding 131 DEG C.
Patent GB-642217-A (GB)
Title: Improvements in or relating to drill bits and processes of making the same
IPC: E21B10/58
Filed: 1948-05-07
Abstract: 642,217. Making percussive rock drills. TIMKEN ROLLER BEARING CO. May 7, 1948, No. 12605. Convention date, July 17, 1947. [Class 83 (ii)] [Also, in Group XXIII] A drill-bit is made from a hollow cylindrical tube pressed inwardly from opposite sides at one end, the sides being in flatwise contact at the longitudinal axis of the bit to form a diametral rib having an edge groove for the reception of a hard metal cutting insert. As shown, the drill bit is formed from a thick walled tube 1 by pressing opposite sides together at one end, e.g. by forging, to form a transverse rib 4 of length greater than the diameter of the tube and machining a groove 5 in the rib into which a hard metal cutting insert is pressed and brazed. The open end of the tube may be threaded and a clearing hole 9 drilled in the curved face of the bit. The shoulders of the rib may be bevelled to conform to the bevel on the insert.
Patent GB-578479-A (GB)
Title: Improvements in or relating to radio navigational systems
IPC: G01S1/30
Filed: 1942-09-09
Abstract: 578,479. Radio navigation systems. FLETCHER, H. Sept. 9, 1942, No. 12682. [Class 40 (v)] A radio navigational beacon comprises two or more spaced transmitters A, B radiating carriers of different frequencies. The carrier from A is unmodulated, but carrier B is modulated by a fundamental modulating frequency, related to the frequencies of carriers A, B, and by a harmonic of that frequency. The receiver has two channels, one responsive to the unmodulated carrier A and one of the side-bands from B, and the other responsive to the unmodulated carrier B and its other side band ; the various frequencies are so chosen that the beat frequencies derived from each channel are the same, and the phase relation of these frequencies indicates the bearing of the receiver with reference to the two transmitters. In the system shown in Fig. 1, master oscillators Wa, Wb generate frequencies of, say, 1001 and 1003 k.c.p.s. which pass through frequency multipliers &c. so that waves of, say, 4004 and 4012 k.c.p.s. are radiated from antennae A, B. Part of the output of oscillators Wa, Wb is led to a mixer M and filters F from which beat frequencies of 2 k.c.p.s. and harmonics of 10 k.c.p.s. are derived and used to modulate the carrier B. Side-band frequencies of 4002,; 4010, 4014 and 4022 (i.e. 4012Œ2 or 10) are thus produced and radiated. At the receiver, channel C receives carrier A (4004) and sideband 4002 of carrier B, while channel D receives carrier B (4012) and its side-band 4010, the beat frequencies of 2 k.e.p.s. derived from each channel being led to a phase meter, e.g. a cathode-ray tube or the meter described in Specification 537,743, [Group XXXVI]. The phase of the output from channel C is a function of the azimuth angle and distance from the two transmitters, but the phase of the output from channel D is a junction only of the distance, so that the phase difference of the two outputs is a function of the azimuth angle. The loci of points of equal phase difference (or of equal path difference to the two transmitting antennµ concerned) form a series of confocal hyperbolae with the aerial locations as foci. At distances large compared with the aerial spacing, the hyperbolµ have for practical purposes reached their assymptotes. Specification 452,235 also is referred to.