baber/WOPTO huggingface dataset:
Patent GB-659702-A (GB)
Title: Chain-shifting mechanism of derailleur-type gear for cycles
IPC: B62M9/126
Filed: 1949-10-01
Abstract: 659,702. Variable-speed gearing. CAMILLIS, L. Oct. 1, 1949, No. 25279. [Class 80(ii)] In chain-shifting mechanism for cycles wherein a carrier plate 5 for jockey and tensioning wheels 6, 7 is mounted on an axle 1a slidable in a sleeve 16 secured in a fixed arm 2 under the control of Bowden mechanism 9, one end of a coiled spring 8 encircling the axle 1a and operating in compression and in torsion is secured to the carrier 5, while the other end is secured to a cap 11 which has a central hexagonal opening 11a engaging over a hexagonal nut 10 fixed on the sleeve 16. To adjust the torsion of the spring, the cap 11 is slid off the nut 10, turned in the required direction and replaced on the nut.
Patent GB-405377-A (GB)
Title: Improvements relating to cranes
IPC: B66C23/36
Filed: 1932-09-10
Abstract: 405,377. Jib cranes; winches. JONES & CO., Ltd., T. C., and CUBITT, E. R. Y., 93, Wood Lane, Shepherd's Bush, London. Sept. 10, 1932, No. 25286. [Classes 78 (iv) and 78 (v).] In a slueing crane with engine and winch movable about a pillar on the carriage, such as is used for lifting spoil from a trench, the winch is controlled by a single lever 5 extending forwardly in the direction of the outer end of the jib to enable the operator to stand close to the hoisting rope with one hand free. The lever 5 is movable in one plane to operate the brake and in another plane to control the driving gear. As shown, the brake band 1 is applied by a spring 3 and released by moving the hand-lever 5 vertically about the pivot 7. The pivot 7 is carried by an arm 8 on a sleeve 9, the inner end of the lever 5 working within a slot in the sleeve. Horizontal movement of the lever 5 swings the arm 8 so as to move the shaft 13 axially bringing the driving pinion 14 into or out of gear with the spur-wheel on the winch drum and moving fast and loose pulleys across the line of the driving belt. The shaft 13 is normally held by a spring in the non-driving position, and a separate hand-driving gear may be connected to the spur-wheel on the winch drum. In a modification, Figs. 4 and 5 (not shown), the horizontal movement of the control lever 5 turns a sleeve on the drum shaft so as to clutch the driving-wheel to the winch drum.
Patent GB-755388-A (GB)
Title: Improvements in or relating to electric discharge tube amplifiers
IPC: H03F3/32
Filed: 1954-08-31
Abstract: 755,388. Valve amplifying circuits. ELECTRO.VOICE Inc. Aug. 31, 1954, [March 1, 1954], No. 25299/54. Class 40 (6). A push-pull amplifier comprises a pair of valves with a load impedance connected be. tween two similar electrodes and with a sepa. rate H.T. supply connected between the anode of each valve and the cathode of the other. In one embodiment, the output transformer 73 of an audio amplifier is connected between the cathodes of the output valves 62, 64 and has an earthed centre tap. The anode of the valve 62 and screen grid of the valve 64 are joined and obtain H.T. from a supply comprising rectifier 79, mains transformer winding 78 and smoothing circuit 82, the low potential end of which is connected to the cathode of the valve 64. The anode of the valve 64 is similarly joined to the screen grid of valve 62, and to a second H.T. supply comprising rectifier 871, mains transformer winding 86 and smoothing circuit 89, the low potential end of which is connected to the cathode of the valve 62. The valves are provided with fixed grid bias, by means of mains transformer winding 69, rectifier 68 and smoothing circuit 72. The amplifier also comprises a push-pull driver stage 54, 56, the anodes of which obtain H.T. from supplies 871 &c. and 79 &c. respectively. The preceding stages comprise a cathode-follower type phasesplitter 47 and a phase-splitter 42, both of which obtain H.T. from both power supplies via equalizing resistors 92, 93 and a smoothing condenser 95. Modifications described include the connection of self-bias resistors between each output valve cathode and the corresponding primary of the output transformer (Fig. 4, not shown). In other embodiments the output transformer is without the centre tap and connected between the anodes of the output valves, the cathodes of which are connected either by a pair of resistors (Fig. 2, not shown) or by a centre-tapped choke (Fig. 3, not shown) to a source of bias potential. The arrangement allows of a simpler output transformer being used and obviates " switching " transients when embodied in a class AB or B amplifier.
Patent GB-651614-A (GB)
Title: Improvements in the manufacture of electric accumulator plates
Inventor: WYNNE-JONES WILLIAM FRANCIS KE
IPC: H01M4/68
Filed: 1948-09-29
Abstract: 651,614. Accumulators; electrolytic production of lead-tin alloy. MINISTER OF SUPPLY, JONES, W. F. K. WYNNE-, and BECK, W. H. Sept. 29, 1948, No. 25346. [Classes 41 and 53] A positive plate for an accumulator is made by electrolytically depositing lead on a layer of tin or tin alloy which may be supported on a foundation plate. The foundation plate may comprise a zinc sheet covered with copper upon which a layer of tin is electrodeposited from a sodium stannate bath. The tinned plate is dipped in fluoboric acid and then made the cathode in a lead fluoborate plating bath, some of the tin in the foundation plate alloying with the lead as it is deposited. In another method the foundation plate is provided with a layer of tin by dipping it in molten tin. Alternatively the electrode may be made by depositing lead on a sheet of tin-plate. The completed electrode may be constructed as a bipolar electrode, one side being formed positively and the opposite side negatively. Specification 651,615 is referred to.
Patent GB-340510-A (GB)
Title: Improvements in or relating to driers and the like
IPC: F26B15/12
Filed: 1929-08-20
Abstract: 340,510. Drying sheet material. COE MANUFACTURING CO., Painesville, Ohio, U.S.A.-(Assignees of Moore, R. C.; 421, Bank Street, Painesville, Ohio, U.S.A.) Aug. 20, 1929, No. 25374. Convention date, Feb. 16. [Class 34 (ii).] A drying-chamber for sheet material is provided with a seal at each end of the chamber to maintain the pressure about the end substantially equal to the pressure within the adjacent chamber end. The invention is described in connection with a drier in which the drying medium is so circulated that there is a positive pressure with respect to the atmosphere at the discharge end and a negative pressure at the charging end. At the discharge end the seal comprises a section 13 located between the chamber and a cooling section 14 and is provided with rolls 15 in operative alignment with apertures 12 in the main chamber wall and rolls 10 inside the chamber for traversing the material. Sufficient air is drawn through a duct 17 and passed through ducts 19, 20 and manifolds 21, 22 for circulation in the section 13 to balance the pressure in the chamber and prevent leakage of drying medium therefrom. At the charging end of the chamber the seal is similar except that air is exhausted from the section to prevent the entry of air from the room into the chamber.
Patent GB-944913-A (GB)
Title: Improvements relating to double-tube heat exchangers
IPC: F28D7/10
Filed: 1961-07-13
Abstract: 944,913. Double-tube heat exchanger. MANFRED BEHR, [trading as SUDDEUTSCHE KUHLERFABRIK JULIUS FR. BEHR]. July 13, 1961 [July 23, 1960], No. 25447/61. Heading F4S. In a double-tube heat exchanger consisting of a bundle of doubletubes where the space between each inner tube 12a and outer tube 12b is longitudinally divided into sections 15 and 16 which serve as ducts respectively for the outward flow and return flow of one of the media, the admission and discharge of the other medium is so arranged that the fluid first flows through the inner tubes 12a and then over and between the exteriors of the outer tubes 12b. The heat exchanger shown consists of a header 1 on one end of a casing 2, the header being sub-divided into three chambers I, II, III by transverse walls 9 and 10 and closure wall 11. A fluid enters inlet 6 and flows to chamber III, here it enters ducts 15 or 16 by means of entry 21 which is formed by cutting away the outer tubes 12b. At the end farthest from the header, tubes 12a and 12b are joined and the fluid flowing down ducts 15 or 16 is transferred to the other duct of the double tube 16 or 15. This is accomplished by terminating short of the end of the tubes, the transverse walls 13 and 14. The fluid then flows through the return duct to chamber II and from thence to outlet 7. The second fluid flows from inlet 8 into chamber I and hence down inner tubes 12a. At the remote end from the header, the double-tubes are positioned by bores provided in a transverse disc 23, this disc also has return flow apertures 25. The transverse disc 23 can have any polygonal shape corresponding to the arrangement of the double-tube bundle, e.g. hexagonal. The fluid flowing through 12a passes into chamber IV and hence through apertures 25 and between the sides of disc 23 and the casing 2 down the outsides of the outer tubes 12b finally flowing out at outlet 30. The fluid flowing between the outer tubes and the casing 2 is diverted, by a baffle ring 26 (Fig. 5, not shown), the central opening of which is adapted to the arrangement of the tube bundle. In a modification (Fig. 7, not shown), the header is divided by a diametral partition into two sub-chambers which serve for the admission and discharge of that medium which flows through the inner tubes. The bundle of tubes and the interior of the casing are also divided by a partition such that the said medium first makes its outward and return flow through the inner tubes and over the outer tubes of one half of the bundle and then makes its outward and return flow over the outer tubes and through the inner tubes of the other half of the bundle.
Patent GB-308150-A (GB)
Title: Improvements in or relating to two-stroke cycle internal combustion engines
IPC: F01L5/06
Filed: 1928-09-05
Abstract: 308,150. Robertson, J. W. Sept. 5, 1928. Two-stroke-cycle engines; cylinders, passages and ports of. - In a two-stroke engine with cylinder of two diameters, a measured volume of compressed charge trapped in. the transfer passages on the previous cycle is admitted for scavenging before the main charge. A two-diameter sleeve valve 4, having the same frequency as, but out of phase with, the main piston, is formed with ports 9, 10 controlling transfer passages 3 in the cylinder and transfer channels 7 in the piston, with exhaust ports 11 controlling cylinder exhaust ports 12, and with ports 14 controlling inlet at 13 to the pump space formed between the enlarged parts of the piston and sleeve. After the mixture charge compressed in the pump has been transferred through the passages 3 with the exhaust closed, both ends of the passages 3 are closed by the valve so as trap the charge therein, this volume of mixture being admitted on the following cycle before the main charge and while the exhaust ports are still open. Air compressed in the annular space 18 between the sleeve and cylinder may be used for scavenging, or this space may be merely vented at 19 to the crank case. The upper ends of the transfer passages 3 are inclined t.n. correspond with the inclination of the combustion head, and the cylinder exhaust ports 12 are arranged intermediate the ends of the transfer passages.
Patent GB-728158-A (GB)
Title: A typewriter with a keyboard adapted for scripts with combined characters (ligatures)
IPC: B41J5/10
Filed: 1952-10-10
Abstract: 728,158. Typewriters. OLYMPIA WERKE WEST GES. Oct. 10, 1952 [Nov. 13,. 1951], No. 25455/52. Drawings to Specification. Class 100(4). Keyboards.-A keyboard for a typewriter has situated amongst the ordinary keys some which effect the complete printing of a ligature by the use of a single key and has a special backspacing or ligature key so that ligatures may be formed by separate keys as described in Specification 728,149. Aligning for impression.-Accent signs may be printed by special keys which operate typelevers which are guided by an additional slot in a type-guide. This slot is situated one letterspace to the left of the usual slot so that backspacing is unnecessary.
Patent GB-844615-A (GB)
Title: Folding tables and like articles of furniture
Inventor: RASSIER CECIL ARTHUR
Filed: 1956-08-21
Abstract: 844,615. Tables &c. SEBEL & CO. Ltd., D. Aug. 21, 1957 [Aug. 21, 1956], No. 25478/56. Class 52(3) In a table, seat or the like in which pairs of legs 6 joined by cross-braces 7 are pivoted 10, 11 to the table &c. top and are held in extended position by engagement of the cross-braces 7 in bights 13 of a leaf-spring 12 and in folded position by the leaf-spring 12 as shown in Fig. 2, the leaf-spring is locked in the folded position by buckles 18 pivoted to the table &c. top and taking over hooked ends 19 of the leaf-spring. The leafspring extends to both ends of the table &c. and is welded to a bar 15, 16 welded to the table &c. top, buckles 18 also being pivoted to the bar. The legs are pivoted to U-shaped channels 3 secured detachably by nuts and bolts 5, 4 to the side flanges 2 of the table &c. top.
Patent GB-930042-A (GB)
Title: Improvements in or relating to machinery for cutting, embossing or marking materials
Inventor: PREW THOMAS BENJAMIN
IPC: A43D8/08
Filed: 1961-07-14
Abstract: 930,042. Cutting-out presses. STAFFORD TOOL & DIE CO. Ltd. April 26, 1962 [July 14, 1961], No. 25493/61. Addition to 908,665. Class 31 (1). [Also in Group XVI] The machine for simultaneously heat-sealing and cutting laminated materials claimed in the parent Specification is provided with a switch 10 which is so located that the movement of the press to the position in which the die 5 and worktable 2 are in contact, switches it to the " on " position. The press, which may be operated by air or hydraulic pressure, is set in motion by pressing a switch 6 actuating a solenoid 7. With the die and work-table in contact for the required time of heating by the high-frequency generator 4, the source of heat is cut off and the press operated to give a clean cut either by foot pressure or the mechanism which switches off the heat. If desired, a timer switch may be set to switch off heat at a set time and operate the press for the cutting operation.
Patent GB-1303935-A (GB)
IPC: C12P13/04
Filed: 1971-04-19
Abstract: 1303935 3 - (3,4 - Dimethoxyphenyl) - L- alanine PARKE DAVIS & CO 19 April 1971 [30 March 1970] 25568/71 Heading C2C Title compound is prepared by enzymatic hydrolysis of the racemic N-acetyl derivative using an acylase from Aspergillus oryzae in an aqueous media at pH 6À0-9À0. Hydrolysis of the product gives L-DOPA.
Patent GB-1341280-A (GB)
IPC: F16L1/23
Filed: 1971-04-19
Abstract: 1341280 Welding BROWN & ROOT Inc 19 April 1971 [15 April 1970] 25617/71 Heading B3R [Also in Divisions F2 and E2]  An internal clamping tool for applying tension to a pipe-line being layed underwater from a vessel also serves to align and position successive sections 24, 34 of the pipe-line prior to the sections being welded together. As shown, the tool comprises two disconnectible portions, disposed in the respective pipes to be welded, in which a two-part elongate mandrel 50 is rotatingly driven by a motor 98 in response to hydraulic pressure transfer along bores 122, 124 in the mandrel. Rotation of the mandrel 50 axially displaces a power screw tapered nut 62 carried in screwed engagement on the mandrel to slide a plurality of tapered clamping members into contact with the pipe 24. Additional pipe-clamping studs 217, 202 engage the pipe in direct response to fluid pressure increase in hydraulic chambers communicating with the bores 122, 124. A trolley arrangement 40, operated by fluid pressure transfer through further mandrel bores (126, 128) (Figs. 8, 9, 11- 13, not shown), positions the first tool portion in the pipe 24. In the second tool portion, clamping studs 252 are actuated hydraulically to clamp the second pipe 34. The studs 252 are mounted in a housing 246 carried by the mandrel 54 for limited axial and rotational movement thereon to enable the pipe 34, when aligned with pipe 24, to be spaced with a desired welding root gap. Axial movement of the housing 246 is facilitated by applying pressure to a chamber 270. Upon completion of the welding and laying operation, the second tool portion is retrieved fully from the pipe to allow a new pipe section to be placed in position.
Patent GB-949630-A (GB)
Title: Heat-deformable compositions based on polyoxymethylenes of high molecular weight
IPC: C08G59/14
Filed: 1961-07-14
Abstract: A composition comprises polyoxymethylene and 0.01 to 10% of its weight of a stabilizer which is an aromatic compound neither phenolic or basic which may be substituted and which has reactive hydrogen atoms linked to carbon.  The stabilizer may be benzene substituted by halogen, nitro nitrile or acyl groups. Specified stabilizers include nitro or dinitrobenzene anisol, ethylnitrobenzoate, benzonitrile, isophthalic acid dinitrile, bromo nitrobenzene and benzophenone.  The polyoxymethylene may be esterified or etherified e.g. acetylated. The compositions may be fabricated into fibres, foils, filaments, strips and injection moulded articles.  German Specifications 1,076,363, 1,082,404 and 1,083,048 are referred to.
Patent GB-584291-A (GB)
Title: Improvements in boots, shoes, and the like
IPC: A43B21/20
Filed: 1944-12-22
Abstract: 584,291. Soles and heels of boots and shoes. JOWERS, HOLLAND, & CO., Ltd., and SHEARER, R. H. Dec. 22, 1944, No. 25753. [Classes 17 (ii) and 17 (iii)] A part at least of the tread surface of the sole or heel of a shoe is made of transparent material 12 through which pictorial and/or printed matter shows. The transparent material may be a plastic material and the pictorial matter &c. may be attached to it or to the surface below it. A renewable heel tip 14 may complete the heel tread surface.
Patent GB-867835-A (GB)
Title: Process of and apparatus for printing or copying by electrostatic photography
Inventor: WOODHAM EDWARD
IPC: G03G15/26
Filed: 1956-08-23
Abstract: 867,835. Electrophotographic processes. MASON & SONS Ltd., E. N. Aug. 20, 1957 [Aug. 23, 1956], No. 25792/56. Class 98(2) In an apparatus for producing electrophotographic prints from a continuous roll of photoconductive material, the end section of the roll is severed before or after exposure and is fed to developing and fixing devices independently of the feed from the roll. As shown in Fig. 1, the photoconductive material from a roll 2 is fed through a charging device 4 into a loop 8, through rollers 9 and into the exposure station A. The end section in the exposure station is severed by a knife 12 before or after exposure. and is then fed to a developing device 18 and a heater 19. During exposure and development of a severed section the feed from roll 2 continues so that the loop 8 increases. Then the material is fed rapidly from the loop into the exposure station and the next section severed. Arrangements are made for projection printing from an opaque original placed on a holder 23 or from a microfilm (not shown), or for contact printing in which the original is inserted at 41, passing round roller 9 with the photoconductive material, and is carried over a curved platen 38 in the exposure station by an endless apron 39. Alternatively, the original and photoconductive material may be carried round a rotating transparent cylinder containing the light source. Specification 867,834 is referred to.
Patent GB-1120183-A (GB)
Title: Improvements in or relating to variable speed gears
Inventor: HARGREAVES DEREK BURTT
IPC: A01C15/00
Filed: 1965-06-18
Abstract: 1,120,183. Variable speed ratchet gear. "SISIS" EQUIPMENT (MACCLESFIELD) Ltd. 16 Sept., 1966 [18 June, 1965], No. 25796/65. Heading F2D. In a variable speed ratchet gear for a granular material distributor wherein cams 12a, 12b, 12c on an input shaft 12 oscillate levers 26a, 26b, 26c fast with the outer races of one-way jamming roller clutches 25 mounted on an output shaft 24, rollers 13 between the cams and levers are carried by a selector fork 14 which pivots about the input shaft 12 to vary the gear ratio. The fork 14 is held in the selected position by a spring pressed cross-piece 22 which engages notches 11 in the gear casing 10. Springs 27a, 276, 27c urge the levers 26a, 26b, 26c towards the cams 12a, 12b, 12c. The output shaft 24, one-way clutches 25 and levers may be mounted in bearing bosses 28 on the opposite side of the input shaft 12 for reverse drive.
Patent GB-1277673-A (GB)
Title: Currency conversion calculator
Inventor: FLETCHER JOHN FORSYTH
IPC: G06C3/00
Filed: 1970-05-28
Abstract: 1277673 Currency conversion calculators J F FLETCHER 20 May 1971 [28 May 1970] 25819/70 Heading G4B. A currency conversion calculator comprises a base J carrying a fixed circular scale F calibrated logarithmically in a double decade, and a plate E mounted for rotation about the centre D of the fixed scale and carrying a movable circular scale G also calibrated logarithmically in a double decade, one of the scales including index marks H representing the rates of exchange of other currencies with respect to a reference currency e.g. sterling or U.S. dollars (Fig. 2, not shown) and the other scale including a datum mark A. In the embodiments shown the index marks are on the movable scale. A table of conversion rates may be printed on the central portion I of the plate E. A cursor, mounted for rotation about D may also be provided.
Patent GB-259763-A (GB)
Title: Improvements in fire extinguishers
IPC: A62C13/00
Filed: 1925-10-16
Abstract: 259,763. Morris, J. Oct. 16, 1925. Extincteurs.-In a fire-extinguisher of the kind in which a valve B closing an inner, acid receptacle a has a spindle b projecting through the cap D and is held closed by a spring b<1>, the cap D is provided with a sleeve extension E having straight slots e in which slide pins d on the spindle b. After raising the handle b<2> to open the valve B, a slight rotation of the spindle moves the pins away from the slots e and so prevents the re-closing of the valve by the spring b<1>. The valve may be single or double-seated, and the spindle may be hollow or solid. Specifications 222,234 and 228,321 are referred to.
Patent GB-169618-A (GB)
Title: Improvements in cycle brakes
IPC: B62L1/08
Filed: 1920-09-08
Abstract: 169,618. Lamplugh, H. A. Sept. 8, 1920. Brake mechanism.- In cycle brake mechanism wherein the yoke or stirrup carrying the blocks is provided at its extremities with guide-pegs engaging with holes on clips secured to the fork limbs, in order to obviate friction, the pegs, or the clip part or parts that engage with the peg, are made from a non-ferrous material such as delta metal or brass. In the case of the pegs, these may be cut from round wire, one end being reduced to engage with a hole in the sheet-metal stirrup and then riveted ever. As shown in Fig. 3, the guide-hole in the extension 10 of the clip 8, 9 is fitted with a non- ferrous bush 12, which is flanged at its ends 13 to lie over the upper and lower faces of the extension. Or these faces mav be recessed to receive the flanged ends of the bush. Alternatively, one or both members of the clip may be made wholly of non-ferrous material.