baber/WOPTO huggingface dataset:
Patent GB-1093816-A (GB)
Title: Automatic burner height control circuit
Inventor: REDMAN DEREK HARRY
IPC: B23K7/10
Filed: 1964-11-13
Abstract: 1,093,816. Automatic position control. HANCOCK & CO (ENGINEERS) Ltd. Nov. 12, 1965 |Nov,13, 1964], No.46328/64. Heading G3R. In a system for automatically maintaining the height of an oxygen jet cutting burner above a workpiece, a capacitance between an electrode attached to the burner and the workpiece varies the frequency of an oscillator which controls, through differentially connected transistors and controlled rectifiers, a reversible D. C. servomotor raising and lowering the burner as necessary. As applied to an oxygen jet burner cutting a workpiece to shape at constant speed under the control of a photo-electric device following a line drawing, an encapsulated oscillator 11 and capacitor plate 12, Fig. 1 (not shown), are attached to the burner so that the capacity between plate 12 and the metal being cut, which determines the oscillator frequency, is indicative of the height of the burner. A voltage dependent on oscillator frequency is applied from a potentiometer VR 1  to bias a transistor TR 2  which, together with a transistor TR 1  having a fixed bias, forms a differential amplifier which is balanced when the burner height has a desired value determined by the setting of potentiometer VR 1 . Any unbalance, representing variation of burner height, is effective, through further differential amplifiers formed by transistors TR 3 -TR 6 , to render one or other of two silicon-controlled rectifiers SCR 1 , SCR 2  conductive to energize one half of a split field winding 39, 40 so that a motor 35 runs in the appropriate direction to raise or lower the burner and thereby correct its height. Bias controlled by a potentiometer VR 2  provides a variable "dead-band" for the control system. Switches SW 1 , SW 2  may be operated manually to stop the motor or to cause it to move the burner away from the work, respectively. An alternative arrangement for producing the dead-band by utilizing diode conductivity is described. In another modification involving a different transistor arrangement, the speed of the motor is made dependent on the magnitude of the error. Control of armature current instead of field current is referred to. Supply voltages are stabilized by Zener diodes.
Patent GB-1464518-A (GB)
IPC: B62D7/18
Filed: 1975-11-11
Abstract: 1464518 King-pin arrangement INTERNATIONAL HARVESTER CO 11 Nov 1975 [11 Nov 1974] 46545/75 Heading B7H [AlsoinDivision F2] A locking device for alleviating relative axial rotation and longitudinal movement between a king-pin 13 and the boss 11 of an axle 10 comprises a passage 22 extending transversely through the boss and intersecting the bore 12 in which the king-pin is mounted, and a bolt assembly (see Fig. 2) comprising (1) a bolt 29, (2) a tube 34, and (3) two wedge portions, one of which is formed on the end of the tube, which engage the circumferential surface of the king- pin tangentially at positions arcuately spaced from one another about the king-pin, the arrangement being such that when nut 36 is torqued to a predetermined extent, the two wedge portions are deformed against the circumferential surface of the king-pin. The other wedge portion may be a flat portion 32 on the head 30 of the bolt, or it may be formed on the innermost end of a tube located between the head of the bolt and the king-pin. The wedge portions may be flat, chamfered, contoured initially to the circumferential surface of the king-pin, and may be formed of a material softer than that of the king-pin. The bolt head may be circular, hexagonal, or square in cross-section and may be provided with a notch 33 to indicate when wedge portion 32 is in tangential engagement with the circumferential surface of the king-pin.
Patent GB-1386929-A (GB)
Title: Process for the separation of aromatic hydrocarbons from a mixed hydrocarbon feedstock
IPC: C10G21/04
Filed: 1973-10-05
Abstract: 1386929 Separating aromatic hydrocarbons UNION CARBIDE CORP 5 Oct 1973 [6 Oct 1972] 46563 Heading C5E Aromatic hydrocarbons are separated from a mixed feed containing C 5 -C 7  aliphatic hydrocarbons by a process comprising:-(a) extracting in a first zone at 50-150 C. and a pressure from atmospheric to 200 p.s.i.a. with a mixture of a primary water-soluble organic solvent and a paraffinic or naphthenic secondary solvent to give an extract comprising aromatics, primary solvent and up to 5% aliphatics; (b) extracting the extract from (a) in a second zone with the secondary solvent in the same temperature and pressure ranges as (a) to give as second extract aromatics, secondary solvent and aliphatic impurities; (c) recycling the primary solvent withdrawn from the second extraction to the first extraction; (d) recycling some of the second extract to the first zone to provide the secondary solvent for (a) and distilling the balance to separate aromatics and aliphatic impurities from the secondary solvent; (e) distilling the raffinate from (a) to separate aliphatic hydrocarbon from the secondary solvent which is recycled to the second extraction zone; and subjecting the aromatic hydrocarbon mixture obtained in (d) first to an azeotropic distillation to obtain high purity benzene and then the higher boiling materials to a toluene distillation, a major part of the heat required for the azeotropic distillation being supplied by heat exchange between a portion of the benzene and aliphatic azeotrope leaving the azeotropic distillation as bottoms and the toluene distillation overhead and recycle of the benzene to the azeotropic distillation as vapour. The primary solvent should have a higher b.p. and be non- azeotropic with the feed and is preferably waterfree. Suitable solvents are glycols (e.g. tetraethylene glycol), sulpholane, N-methyl pyrrolidone and dimethylsulphoxide. Suitable secondary solvents are C 10 -C 19  paraffins and naphthenes.
Patent GB-982448-A (GB)
Title: Alloy steel
IPC: C22C38/08
Filed: 1963-11-26
Abstract: A hot-rolled steel has the following percentage composition: .C.up to 0.08 .Mn.0.1 -1 .Si.0.03 -0.5 .Cu.0.9 -2 .Ni.0.5 -2.5 .Nb.0.005-0.25 .Al.0 -0.5 Fe and incidental elements, the balance. Cr and Mo should not exceed 0.2% each.  A steel containing at least 1% Cu may be precipitation-hardened by heating to 850-1150  DEG F.
Patent GB-997620-A (GB)
Title: Improvements in adjustable blackboards
IPC: A47B97/06
Filed: 1963-11-27
Abstract: 997,620. Blackboards; balancing arrangements. F. BONG. Nov. 27, 1963, No. 46783/63. Heading B6P. [Also in Division B8] A counterbalancing system for supporting a vertically sliding blackboard 1, Fig. 1, comprises bearing cords 8, 9 attached to a pulley 6, yieldingly held against rotation by a spring unit 23 acting through a cord 18 which wraps over a cam 7 operating to change the effective radius and maintain a substantially constant lifting force on the board. In the example of Fig. 1, the cord 9 passes over a freely-rotating pulley 10, both pulleys being attached to a fixed part of the frame. In modifications, both pulleys may carry spring-loaded cams 6 and are interconnected by a crossed cord to synchronize the movements on opposite sides. In a further example the pulleys and springs may be mounted on the back of the board and the cords attached to fixed parts of the framework.
Patent GB-1166117-A (GB)
Title: An electromagnetically operable pressure fluid valve
Inventor: JACOB HENRI
IPC: F16K31/06
Filed: 1966-10-19
Abstract: 1,166,117. Valves. NORD-AVIATION SOC. NATIONALE DE CONSTRUCTIONS AERONAUTIQUES. 19 Oct., 1966 [17 Dec., 1965], No. 46868/66. Heading F2V. Valve, particularly for controlling gas flow in artificial satellites for stabilization purposes, includes a loose ball closure 1a which may be of superfinished bearing type steel co-operating with a seat 1b which may be of plastics material such as P.T.F.E. The ratio of ball diameter to seat opening may be 1À5 and the opening may have a radius of a few microns. The ball closure is spring loaded through a piston 2c carried in a sleeve 2a which also co-operates with the seat 1b to provide an additional closure. This sleeve constitutes the armature of a solenoid 5<SP>1</SP> which is energized to open the valve. The existence and duration of flow through an outlet Venturi 5c can be recorded through a signal from an electric switch 7c when this is actuated by a diaphragm 7a responsive to pressure in an outlet conduit 5b. In another embodiment, Figs. 3 and 4 (not shown) the ball closure is on the upstream side of the seat and is actuated through a push rod, the sleeve 2a being omitted.
Patent GB-1219497-A (GB)
Title: Electric switches
Inventor: HARLEY DAVID NORMANN
IPC: H01H13/18
Filed: 1968-10-03
Abstract: 1,219,497. Retroactive switches. ITW Ltd. 3 Oct., 1969 [3 Oct., 1968], No. 47034/68. Heading H1N. A switch, controlling a light 11 for illumin. ating the interior of a refrigerator when the door is open, comprises two movable resilient contacts 14, 15 made of carbon steel strip. The contact 14 is frictionally retained between portions 18, 19 of a cover 9 and the contact 15 is retained between portions 24, 25 of the cover. The cover is made of polypropylene as is an operating member 30. The operating member comprises a wedgeshaped portion 33 which is forced between the contacts 14, 15 as the result of a pivotal operating force applied to a member 31. When the operating force is removed, by opening the refrigerator door, the resilience of the contacts 14, 15 forces out the operating member which causes the contacts to close and complete the supply to the light 11. The member is pivoted about an integral hinge portion or, in a modification, by a hook-shaped projection. In an alternative embodiment, not shown, the contacts are symmetrical and retained in a tubular housing which is held in a hole in a panel by resilient legs. The operating member is axially reciprocable and the end which is inserted between the contacts is parabolic in cross-section and the shape can be selected to determine the relationship between position and restoring force. It is stated that the resilient contact can be replaced by a movable contact operated on by a separate spring.
Patent GB-995030-A (GB)
Title: Closure assembly
IPC: B65D25/08
Filed: 1962-12-13
Abstract: 995,030. Closure assembly; packages; compartmented containers. ABBOTT LABORATORIES. Dec. 13, 1962 [Dec. 15, 1961], No. 47168/62. Headings B8C, B8D and B8T. A stopper 30 (Fig. 35) having a tubular piston 31 and an enlarged head 32 is prevented from passing into the neck 25 of a container by projections 39 (Figs. 2 and 5) or a rim 41 (Fig. 8) on a ring 34a which projects into the underside of the head 32. The container shown (Fig. 1) has two compartments separated by a neck 23 containing a stopper 24a which is pushed into the lower compartment 20 by pressure on the upper stopper 30. The liquid L may be in the lower compartment 20 and the solid D in the upper compartment 16 instead of the arrangement shown. The stopper 30 and ring 34 may be assembled by pushing the head 32 (Fig. 1) upwards through the hole 36 (Fig. 2) in the ring 34. The head 32 has a dished topside 29a and a needle locating ring 29b so that the stopper may be pierced and the liquid drawn off through a needle. The stopper is made of any resilient material capable of being pierced by a needle. When the ring has projections 39 the stopper must be of a material e.g. rubber, capable of being pierced by these projections. The ring may have a flange 35 (Fig. 2) to anchor it on the neck of the container which may be beaded.
Patent GB-1359665-A (GB)
Title: Heatexchanging apparatus
IPC: F24H1/28
Filed: 1971-10-11
Abstract: 1359665 Gas heaters; heat exchangers H VIESSMANN 11 Oct 1971 [9 Feb 1971] 47268/71 Headings F4A and F4S A heat exchanger comprises a combustion chamber 6 in heat exchange relationship with a liquid or gas to be heated which is passed within a housing defined by arcuate shell portions 1, 2; shell portion 1 being secured to shell portion 2 which itself is secured to the combustion chamber by flanges 4, the flanges having holes 5 to allow the passage of the liquid or gas being heated. More than two shell portions may be used (Fig. 3, not shown) and further heat exchange surfaces are provided by heating gas return ducts 13 communicating, by means not shown, with the combustion chamber.
Patent GB-1033846-A (GB)
Title: Pipe system for an underwater well
Inventor: EEK WOUTER HUGO VAN
IPC: E21B33/14
Filed: 1964-11-20
Abstract: 1,033,846. Boring earth; wells. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Nov. 20, 1964, No. 47427/64. Heading E1F. An underwater well comprises a conductor pipe 4 and a cellar pipe 1 cemented to the water bed 2. The conductor pipe is centralized by members 8 and is cemented to the bed and the cellar pipe which is sealed by a flexible or movable cap 11. In a modification the lower end of the cellar pipe is tapered to dispense with the members 8. In a further modification the cellar pipe has a frusto-conical bottom welded to the conductor pipe. A platform 5 may be mounted on the conductor pipe which may also carry a wellhead 6 after the well has been drilled.
Patent GB-1273227-A (GB)
Title: Improvements in or relating to safety control devices for intermittently operated machines
IPC: F16P3/24
Filed: 1969-09-26
Abstract: 1,273,227. Machinery safety devices. LA TELEMECANIQUE ELECTRIQUE. 26 Sept., 1969 [27 Sept., 1968], No. 47599/69. Heading F2J. In order to operate a power press, an operator must use both hands simultaneously to actuate two push buttons 4 connected to respective parallel racks 19 engaging diametrically opposite points of a toothed wheel 20 to move the wheel bodily in its own plane, without rotation, to bring a lug 22 thereon into operative engagement with the end 23a of a push rod 23 adapted to operate a control switch or valve 30 for the press. If the racks are not moved in synchronism, or if one button 4 is released during operation, differential movement of the racks will rotate the wheel 20 to move the lug 22 out of alignment with the rod 23 (Figs. 5, 6, not shown), a spring 24 urging the rod 23 to its inoperative position. Both push-buttons must be released before a fresh operation can be initiated. Springs 18 urge the racks 19 to inoperative positions, Fig. 3. A fork 26 on the push rod 23 has a lost-motion connection with an actuating rod 27 of the switch or valve 30. The racks 19 are formed on or secured to blocks 14 slidable on fixed guides 15. Each push-button 4, partly surrounded by a guard 3, actuates its rack via a lever 11 having a fixed pivot 10. Flanges 21 on the wheel 20 engage the sides of the blocks 14 to maintain the wheel in the correct plane.
Patent GB-1503307-A (GB)
Title: Gas burner controls
IPC: F23N5/20
Filed: 1974-11-05
Abstract: 1503307 Gas burner control system UNITED GAS INDUSTRIES Ltd 4 Nov 1975 [5 Nov 1974] 47782/74 Heading F4T A gas burner control system comprises a manually-operable multi-position switch which in a first position connects an electricaly operated pilot valve 12 in parallel with a spark generator 20 to allow them to be operated together by an iginition switch 21, and in a second position connects a circuit to open a main gas valve 11, the system also comprising a switching device (e.g. thyristor 24) actuated by a flame sensing device 22 and connected in series with the switch. In both the first and second positions, switch S1 is closed, supplying power to transformer 13, to supply the valve and ignition control circuits, and also to clock motor 14 and, via speed reducing circuit 17, to fans 15 and 16. When switch S2 is in the first position (as shown) and the ignition switch 21 is pressed the pilot valve 12 is opened and the spark generator 20 is operated; if a flame is sensed the thyristor 24 conducts so that when the switch 21 is released the pilot valve remains open but a reverse bias is applied to a diode in the spark generator which becomes inoperative; or there may be a further switch or a further position of the multi-poisition switch in which the spark generator is non-operative. If no flame is sensed then the pilot valve will close when the switch 21 is released, and this will be indicated by the extinction of neon bulb 25. When the switch 52 is in a second position, main valve 11 is connected through a series of devices C (such as switches controlled by the clock motor 14 or by thermostats) so that if they are all in compliance (and the thyristor 24 is conducting) the main valve is opened. There may be several operating positions of the multiposition switch, correponding to different conditions of the devices C; there is also an off position in which the switch S1 is open.
Patent GB-1373112-A (GB)
Title: Spectrally sensitized silver halide photographic emulsions
IPC: G03C1/29
Filed: 1971-10-15
Abstract: 1373112 Silver halide emulsions FUJI PHOTO FILM CO Ltd 15 Oct 1971 [16 Oct 1970] 48187/71 Heading G2C A photographic silver halid emulsion is supersensitized with at least one dye of each of the formaulae (I) and (II) and optionally a pseudocyanine, styryl or merocyanine dye, especially of formula III (in which A is 1-4C alkyl R<SP>1-6</SP> are each optionally substituted alkyl, at least one of these alkyl groups in each dye containing a carboxyl or sulpho substituent, W<SP>1</SP> and W<SP>2</SP> are each S or Se, completing a benzothiazole or benzoselenazole ring which may be substituted, B is aryl or 1-4C alkyl; Z<SP>1</SP> completes a naphthothiazole or naphthoselenazole ring; Z<SP>2</SP> completes an optionally substituted naphthothiazole, naphthoselenazole, benzothiazole or benzoselenazole ring; Y is H, OH, 1-4C alkyl, alkoxy or halogen, Z<SP>3</SP> completes an optionally substituted benzothiazole, benzoselenazole or 2-quinoline nucleus; X<SP>1-3</SP> are anions; n, m and p are each 0 or 1; except that when W<SP>1</SP> and W<SP>2</SP> are sulphur and the rings completed by Z<SP>1</SP> and Z<SP>2</SP> are naphthothiazole and A and B are ethyl then the benzothiazole rings of I are not both halogen-substituted). Reference has been directed by the Comptroller to Specification: -1216203
Patent GB-1392862-A (GB)
Title: Method for grinding bevel or hypoid gears and apparatus for the performance of the aforesaid method
IPC: B23F9/02
Filed: 1972-10-20
Abstract: 1392862 Grinding gears WERKZEUGMASCHINENFABRIK OERLIKON - BUHRLE AG 20 Oct 1972 [21 Oct 1971] 48368/72 Heading B3K Apparatus for grinding bevel or hypoid gears comprises a grinding head 10 having a plurality of rotatable grinding wheels. Head 10 comprises a ring 15 screwed to a body 13, and the grinding wheels 12 are each radially and axially adjustably mounted in the ring by a holder 17. Outer grinding wheels 11 are each radially and axially adjustably mounted in the body 13 by a holder 22. A pair of grinding wheels 11, 12, pass through the tooth gap of the gear to be ground and are adjustably spaced from each other by an angle γ 1 . Holders 17, 22, are each radially adjusted by screws 18, 23, and fixed by screws 19, 24. Cam discs 29, 31, are adapted to adjust wheels 11, 12, in the axial direction; the wheels being secured by blade springs 21, 26. Each wheel 11, 12 is rotated about its axis by its own pneumatic motor 32. The grinding head 10 is rotated in either direction by a motor, through a V-belt drive 7AM, and an eight speed gear transmission A, B, C, and the workpiece is rotated by the same source through gearing A, D, and gears T 1 -T 4 . The gear is first cut on the machine of Fig. 3 with a cutter replacing the grinding head. The gear is then finish-ground using head 10. By using cam discs 29, 31, the teeth can be crowned.
Patent GB-1402920-A (GB)
Title: Electrolytic production of high purity alkali metal hydroxide
IPC: C25B9/19
Filed: 1972-10-20
Abstract: 1402920 Electrolytic production of alkali metal hydroxide DIAMOND SHAMROCK CORP 20 Oct 1972 [21 Oct 1971] 48439/72 Heading C7B Alkali metal hydroxide is produced by electrolysis of alkali metal halide in a cell divided by a membrane of fluorinated co-polymer formed by groups having the formulae: and (2) -CXX<SP>1</SP>-CF 2 - wherein:- R represents the group in which R<SP>1</SP> is a fluorine atom or a perfluoralkyl group; Y is a fluorine atom or a trifluoromethyl gp; m = 1 - 3; n = 0 or 1; X = fluorine, chlorine or hydrogen or a trifluoromethyl group; X<SP>1</SP> = X or CF 3 (CF 2 ) z  wherein z = 0-5, and the units of formula (1) are present from 3-20 mole per cent. The anode used may comprise a substrate coated with a solid solution of a platinum group metal oxide and a valve metal oxide (e.g. Ti or Ta substrate with TiO 2 /RuO 2  coating) optionally with other metal oxides present; a valve metal substrate with a platinum group metal alloy coating (e.g. Ti or Ta substrate with Pt/Ir alloy coating); or a substrate having a coating of tin and antimony oxides in which platinum group metal or oxide is dispersed. The cathode may be of steel, Ni, Co, Ti, Pb or Pt; e.g. of expanded metal mesh. As shown the membrane 12 is positioned between two halfcells 15a (containing anode 13 and provided with inlet 17 for alkali metal halide solution, and outlets 16 and 19 for exhausted electrolyte and halogen gas resp .) and 15c (containing cathode 14 and provided with outlets 18 and 20 for alkali metal hydroxide and hydrogen resp.).
Patent GB-1075869-A (GB)
Title: Continuous heat sealing and cutting apparastus
IPC: B29C65/74
Filed: 1964-12-01
Abstract: 1,075,869. Seaming non-metallic sheet material. WELDOTRON CORPORATION. Dec. 1, 1964 [Dec. 5, 1963], No. 48806/64. Heading B5K. Apparatus for radiant heat melting and sealing of superposed layers 50, 52 of a heat sealable material comprises a pair of conveyer bands 46, 48 to clamp the layers 50, 52 therebetween with a free portion extending therefrom, and radiant heating means 70, 72 disposed to simultaneously heat both faces of said free portion of the clamped layers 50, 52 to form a seal. In one embodiment, Figs. 1 and 2, the conveying means comprises flexible bands 38, 40, 42, 44, 46, 48, 49, 51 of high strength, resistance to heat and thermal conductivity, e.g. of stainless steel, extending around aligned pairs of rollers of two sets 6, 8 mounted on shafts 26, 28 and 34, 36, respectively. The rollers situated above the layers 50, 52 are all driven counterclockwise of Fig. 1 and those below clockwise at substantially the same rotational speed. The shaft 26 is driven by a variable speed motor 60, preferably an electric motor, and the shaft 28 is driven therefrom through gears 56, 58. The rollers of the set 8 are driven by frictional contact with the bands 38, 40, 42, 44, 46, 48, 49, 51 driven by the rollers of the set 6. Alternatively, the shafts 34, 36 may be driven by a motor and intermeshed gears or the roller set 8 may be driven from the set 6 through a sprocket and chain arrangement. Four radiant heating assemblies 70, 72, 74, 76 are provided. The assembly 74 comprises a thin, metal radiant heating element 92 extending between supports 80, 82 and connected to conductors 88, 90. The element 92 extends around guide rollers 106, 108 and is held taut during heating thereof by maintaining the conductor 90 stationary and spring biasing the conductor 88 away from the support 80 by a tension spring 102. Similarly assemblies 70, 72, 76 comprise heating elements 118, 122, 114 respectively. A stationary support 150 is provided beneath the upper run of each lower conveyer band and a movable pressure bar 152 pressed by compression springs 156 is situated above the lower run of each upper conveyer band. In use, the elements 92, 114, 118, 122 are energized and then the motor 60 is energized to drive the roller sets 6, 8 and the bands. The layers 50, 52, e.g. of oriented polypropylene, are fed from the left of Fig. 1 into the apparatus and are cut and sealed during passage therethrough to form beads 130, 132, 134, 136. In a modification (not shown), additional sets of rollers, bands and heating elements are arranged on the right hand side of the apparatus of Fig. 2 to form one or more additional continuous tubes. In another modification, Fig. 3 (not shown), the bands 38, 40, 49, 51 are omitted and in a further modification, Fig. 4 (also not shown), only the bands 46, 48 and the heating elements 118, 122 are provided.