baber/WOPTO huggingface dataset:
Patent GB-695683-A (GB)
Title: Improvements in or relating to methods for producing contact springs for electric apparatus
IPC: H01H11/04
Filed: 1951-12-03
Abstract: 695,683. Making contact springs. TELEFONAKTIEBOLAGET L. M. ERICSSON. Dec. 3, 1951 [Dec. 6, 1950], No. 28296/51. Classes 83 (ii) and 83 (iv). Forging; riveting.-Contact springs for electrical apparatus are provided with contact points by feeding a contact strip above a prepunched spring through a punching machine to punch out a contact point and to insert it into the hole in the spring. The contact strip may have a facing of contact metal. In Fig. 1 a spring 15 with pre-punched hole is positioned between a punch 11 and a die 16 with a composite contact strip 13, 14. On depression of the punch a faced contact is punched from the strip and forced into the hole in the strip. The contact is then riveted and shaped. The spring strip 50, Fig. 8, is provided with slots 51 forming attached springs 52 with preformed holes 31, 32, 33, 34. The strip 50 is fed to the left and a bimetallic contact-strip is fed over the holes 34 and the contact points are punched, secured and shaped. The spring is then detached.
Patent GB-519839-A (GB)
Title: Electrical mechanism for controlling a flexible traction member
IPC: H02P7/03
Filed: 1938-09-29
Abstract: 519,839. Drawing curtains and the like. MALLENTJER. V. B. M. Sept. 29, 1938, No. 28353. Convention date, April 12, 1938. [Classes 78 (ii) and 78 (v)] [Also'in Group XIV] For drawing curtains or like purposes an endless flexible member 2 passing round pulleys 3, 4 is tensioned by the weight of an electric motor '9- and its associated driving mechanism and casing 7. The hanging bight of the cord, chain, cable &c. 2 passes round a pulley 5'mounted on a shaft 6 carrying also two friction discs 8, 8<1>. The motor 9 is pivoted at 12 and can be rocked by electro-magnets 13, 13' so as to bring a rubber cone 11 on the motor spindle into engagement with either of the discs 8, 8<1>, thus effecting travel of the cord 2 and its attached curtain in one direction or the other. The magnets 13, 13<1> are excited by hand-operated switches, and the motor may be' automatically stopped by a member on the cord operating another switch in the circuit. Guides are provided for. vertical movement of the casing 7. In a modification the motor is fixed and a single, disc 8 is provided. This may have crown teeth meshing with a pinion on the spindle of the motor, which is controlled by a single switch. Reversal is effected by a cord member which reverses the current direction.
Patent GB-661845-A (GB)
Title: Improvements in or relating to the production of polymethacrylates
IPC: C08F4/32
Filed: 1949-11-07
Abstract: Polymers of methacrylic acid esters, e.g. methyl methacrylate are made by polymerizing the ester in bulk, solution or aqueous media in the presence of 2-methyltetrahydrofurane peroxide, preferably dissolved in 2-methyltetrahydrofurane.ALSO:2-Methyl tetrahydrofurane peroxide is made by stirring 2-methyl tetrahydrofurane in the presence of (1) air or an oxygen-containing gas, preferably using a catalyst such as a cobalt salt or a metal in the same group of the Periodic Table, or (2) hydrogen peroxide and removing the unchanged furane by evaporation.  The peroxide is used as a polymerization catalyst.
Patent GB-207174-A (GB)
Title: Improvements in and relating to methods of carrying on electrolytic processes
IPC: C25B9/17
Filed: 1923-11-12
Abstract: 207,174. Siemens & Halske Akt.-Ges. Nov. 13, 1922, [Convention date]. Ozone, peroxides, and other compounds, obtaining; cells; electrodes; electrolytes, circulating and agitating. - An apparatus for carrying out chemical reactions by electrolysis with high current density, comprises a cell 16 in which is suspended an annular vessel consisting of glass walls 12, 13 joined by a conical platinum tube 11 and filled with mercury to which contact is made by a rod 14. Electrolyte is forced into the space within the annular vessel by a nozzle 17, and part of it passes down the tube 11 carrying with it the gases formed at the upper end of the tube which constitutes one electrode. The remainder passes upwards past the second electrode 18 and by a tube 24 having a liquid seal to the outer vessel. The electrolyte leaves the outer vessel by a tube 25 also provided with a liquid seal. Gases leave the inner and outer chambers by pipes 21, 23 respectively. In a modification the inner electrolyte chamber is dispensed with, the supply tube being joined to the conical platinum tube, which in this case is tapered downwards, and constitutes the inner wall of the annular mercury chamber; the second electrode is situated within the outer chamber and all the gaseous products are withdrawn together. A current density of 100 amps. per sq. cm. may be used in the production of ozone. Peroxides and other compounds in a high state of oxidation may also be produced.
Patent GB-218549-A (GB)
Title: Improvements in or relating to range finding apparatus
IPC: G01C3/10
Filed: 1923-11-12
Abstract: 218,549. Pollak, J. E., (Maschinenbau- Akt.-Ges. Seebach). Nov. 12, 1923. Range-finders.-In electrical apparatus for the measurement of distances by the utilization of two telescopes at the ends of a base means are provided to compensate for the errors introduced by electrical resistances in the circuits which are not measuring resistances. The telescopes are sighted on a point at a known distance, and the resistance 7 corresponding to the log base in the equation log. distance = log. base + log sin angle opposite distance + log cosec. angle opposite the base is adjusted until the instrument 8 indicates the correct distance. The adjusted resistance is then used as though it were correctly log. base. Specification 218,548 is referred to.
Patent GB-1152026-A (GB)
Title: Process for Treating Tobacco and Product thereof
IPC: A24B15/24
Filed: 1966-06-27
Abstract: 1,152,026. Treating tobacco. SERVICE D'EXPLOITATION INDUSTRIELLE DES TABACS ET DES ALLUMETTES. 27 June, 1966 [29 June, 1965], No. 28690/66. Heading A2C. The alkaloid content of tobacco is reduced by extraction of the comminuted tobacco, e.g. shredded tobacco, with water thereby eliminating all water soluble constituents, followed by drying and saucing the tobacco with an aqueous solution of humectants, sugars and perfuming substances. The extracting water is maintained at a temperature at least equal to that of the tobacco.
Patent GB-286707-A (GB)
Title: Improvements in and relating to controlling devices for diesel internal combustion engines
IPC: F02D1/00
Filed: 1927-10-28
Abstract: 286,707. Junkers, H. March 10, 1927, [Convention date]. Lever-actuated pumps; stroke, varying.-In Diesel engines, the amount of fuel supplied to the cylinder is automatically varied with movement of the air throttle by the action of the vacuum existing between the throttle and the cylinder. The vacuum in the air pipe 1 acts on a piston, diaphragm, or vane 11, which automatically adjusts a fuel pump 20 driven by a connecting-rod 25 and lever 23, one end of which is connected by linkage 13, 14 to the vane 11, so as to vary the point at which the plunger 21 overruns the fuel inlet 22. When the throttle 2 is opened wider, the vacuum under the vane 11 becomes less, allowing the spring 15 to move the rod 14 downwards, so that the plunger 21 overruns the inlet 22 earlier and more fuel is supplied to the cylinder. A stop, connected to the throttle valve, may be arranged to limit the downward movement of the lever 13. The end 16 of the spring 15 may be adjustable, and the adjustment may be effected by linkage connections to the accelerator pedal. Specification 266,688 is referred to.
Patent GB-838100-A (GB)
Title: Improvements in or relating to the production of porous shaped bodies of thermoplastic material
IPC: B29C33/04
Filed: 1956-09-20
Abstract: 838,100. Moulding cellular plastic materials. ELECTROLUX Ltd. Sept. 20, 1956 [Sept. 26, 1955], No. 28779/56. Class 87(2). Porous cellular articles are produced from granular thermoplastic material, e.g. polystryene, by maintaining the pressure internally and externally of the cells in or formed in the material substantially equal while it is being heated in a mould, and at a suitable temperature, suddenly reducing the external pressure thus causing a rapid homogeneous expansion of the cells. A mould 28 is partially filled with polystyrene containing petroleum ether and then boiling water is added through valve 33 up to the level 41 in the superimposed vessel 34 which carries an outlet valve 37. A gas, e.g. nitrogen, non-condensible under the operating conditions, is contained by the valve 40 in the vessel 38. By operating valves 40 and 37, the water level is maintained constant until, when the polystyrene temperature reaches 95C., valve 40 is closed and the pressure in the mould is released via valve 33 and, optionally, valve 37. The polystyrene 29 thereupon expands and coalesces ; said process being expedited by nitrogen which as diffused into the cells and by the extensive vaporisation of the petroleum ether on reducing the pressure. In a variation of the apparatus, Fig. 2 (not shown), the material in the mould 18 is heated by the passage of hot air and the change of pressure in the mould is indicated by the movement of polystyrene in a small container 22 in the air feed-in 20. A further modification, Fig. 4 (not shown), incorporates an automatic pressure adjusting means operated by bellows 54, and a hot air circulating duct for the mould with a heater 65 and pump 64. The polystyrene may be pre-foamed to some extent before being placed in the mould.
Patent GB-776561-A (GB)
Title: Improvements in or relating to high voltage switchgear
IPC: H02B11/20
Filed: 1954-10-06
Abstract: 776,561. Switchgear structures. SOUTH WALES SWITCHGEAR, Ltd., NICHOLAS, A. J., and BUTTREY, R. N. Sept. 22, 1955 [Oct. 6, 1954], No. 28835/54. Class 38(5) In a high voltage, enclosed, air insulated switchgear unit having two sets of conductors 5. 11 housed in respective separately enclosed chambers 4, 9, each chamber is separately vented to atmosphere in such a manner as substantially to preclude the communication of gases from one chamber to the other. The chambers may be separated by a common dividing wall 15 extending upwardly through an aperture 16 in the roof 17 of the unit, the dividing wall supporting a metal sheeting 18 spaced from the roof so as to define oppositely directed openings 20 which may have gauze screens 21. In the arrangement shown, an oil switch 3 interconnects bus-bars 5 in the chamber 4 with feeder conductors 11 in the chamber 9, though the latter conductors could be replaced by a further set of bus-bars. The switch 3 may be lowered and raised by a wire or like rope lifting means including a winch 22 adapted to be driven selectively by an electric motor 23 or manually by a handle 24. A voltage transformer 27 may be lowered and raised by a manually operated winch 29. Specification 728,156 is referred to.
Patent GB-600901-A (GB)
Title: Improvements in or relating to controlling aircraft
IPC: G05D1/08
Filed: 1938-10-05
Abstract: 600,901. Fluid-pressure-actuated servomotor-control systems. MEREDITH, F. W. Oct. 5, 1938, No. 28883. [Class 135] Both the steering and the cross-levelling of an airplane are controlled by the ailerons which are adjusted by a servomotor controlled by a gyroscope having three degrees of freedom and responsive to deviations in azimuth and roll. As shown in Fig. 1, of the drawings accompanying the Provisional Specification, the outer gimbal ring 3 of the air-driven gyroscope is mounted on fixed pivots 4, 4 and connected to the piston 5 of the servomotor control valve, the servomotor piston 7 being connected by a link 8 to the ailerons and by a follow-up lever 9 to the control valve cylinder 6 which is adjusted to restore the relative positions of the piston 5 and the cylinder after displacement of the piston. The gimbal rings 2, 3 are maintained at right-angles to each other by an anti-topple device comprising a servomotor, the piston 11 of which is connected to the ring 3, and a control valve the piston 10 of which is connected to the ring 2. To turn the airplane, the handle 12 is adjusted to operate a servomotor 13 to precess the gyroscope in the desired direction about the pivots 4, 4. Figs. 2, 3 show a modification in which the gyroscope is mounted athwartships in pivots 24, 24 in a follow-up frame 25 supported in fixed bearings 26. One end of the rotor axle is connected to the piston 27 of a control valve for a servomotor the piston 29 of which is connected by links 30, 31 to the ailerons and the frame respectively, while the other end of the axle is connected to the piston 33 of a control valve for a servomotor 34. The piston 33 detects movements of a point 32 on the other end of the axle at right angles to the line of motion of the piston 27 and the servomotor corrects such movements. To turn the airplane, the frame 25 is displaced relative to the piston 29 by turning the handle 35 or by remote control means thus effecting change over of the valves 36 so as to divert the air supply from the servomotor 34 to the servomotor 37. The change over of the valves 36 may be effected electromagnetically by the handle 35. The motor 37 precesses the rotor about the axis of the inner gimbal ring 22 at the same rate as the airplane turns. The airplane continues to turn so long as the follow-up frame is displaced with a bank angle equal to the angle through which the frame is displaced. Specification 365,187, [Group XXXIII], is referred to.
Patent GB-425375-A (GB)
Title: Improvements relating to systems for relaying and distributing radio programmes
IPC: H04H20/77
Filed: 1933-10-19
Abstract: 425,375. Valve generating circuits. CARPENTER, R. E. H., 11, Garrick Street, and ECKERSLEY, P. P., 82, Swan Court, Chelsea, both in London. Oct. 19, 1933, No. 29002. [Class 40 (v)] In a multi-programme carrier distribution system in which interference by beat frequencies is prevented by selecting as carrier frequencies integral multiples of a base frequency the value of which is somewhat greater than the band-width of a channel, the carrier currents are derived from separate oscillators VI .. V3 held in the correct frequency relation by coupling circuits E, F, each of which is tuned to a common multiple of the frequencies of the two oscillators between which it is arranged.
Patent GB-158421-A (GB)
Title: Improvements in and relating to gauges for measuring the distance between the pins on the back of artificial teeth
IPC: A61C19/04
Filed: 1919-11-21
Abstract: 158,421. Dental Manufacturing Co., Ltd., and Small, J. R. Nov. 21, 1919. Teeth, artificial. -A gauge for setting, according to the distance between the pins on the back of artificial teeth, means for punching the holes in the metal backings for such teeth at the correct distance apart, consists in a pair of members 1, 2, centrally pivoted at the pin 3, provided with holes 4, 5, at each extremity. A tooth with its pins in the holes 4, 4, is held to the gauge by a spring 8, and a spring 10 at the opposite end firmly holds the backing plate in position to enable the required holes to be marked off through the holes 5, 5, for punching. The member 2 may be fitted with a tongue to provide additional bearing surface for the hand of the user-
Patent GB-1079240-A (GB)
Title: The antibiotic l-4-azaleucine
IPC: C12P13/04
Filed: 1966-06-29
Abstract: An antibiotic L-4-azaleucine (laevo-2-amino-3-dimethylaminopropionic acid) is produced by cultivating Streptomyces neocaliberis var. neocaliberis NRRL 3189 in an aqueous nutrient medium containing an assimilable source of carbon and nitrogen under aerobic conditions. L-4-azaleucine is recovered from the clarified fermentation broth by (A) adsorption on a cationic or anionic exchange resin or (B) by the use of a liquid cation exchanger.  The cationic exchange resin may be of the carboxylic or sulphonic acid type and the antibiotic is eluted therefrom with aqueous NH4OH.  Elution from anion exchange resins is by means of dilute mineral acid.  In the case of (B), the clarified broth is treated with a water-immiscible liquid cation exchanger comprising at least one water-immiscible organic diluent and at least one oil-soluble salt of an aromatic sulphonic acid and the resulting loaded liquid cation exchanger is treated with a mixture of water and at least one stripping agent selected from amines, water-soluble acid addition salts thereof and water-soluble quaternary ammonium salts at pH less than 7.0. Purification may be by (a) chromatography on silica, alumina or carbon, (b) liquid-liquid distribution in a Craig apparatus, (c) crystallization from solvents or (d) forming insoluble salts such as the picrate. L-4-azaleucine forms salts with acids, alkali metals, alkaline earth metals and amines. Salts are formed with a wide range of organic acids including pamoic, cholic, camphoric, helianthic, cinnamic and stearic acids.  Salts are formed with therapeutically active bases including purine bases, e.g. caffeine; antihistaminic bases; nicotinic acid amide and isonicotinic acid hydrazide; phenylalkylamines, e.g. adrenaline; and choline.ALSO:The antibiotic L-4-azaleucine (laevo-2-amino -3-dimethylaminopropionic acid) may be used as a general disinfectant along with other anti-bacterial agents, e.g. may be added to wash solutions for domestic and general applications.
Patent GB-902468-A (GB)
Title: Improvements in or relating to bed quilts
IPC: A47C27/12
Filed: 1959-08-27
Abstract: 902,468. Bed quilts. SLATER, T. June 30, 1960 [Aug. 27, 1959], No. 29265/59. Class 142 (4). A method of making a bed quilt comprises quilting to a single fibrous batt 17 a panel or panels 10, 11 of covering material, folding the assembly and stitching the edges so that the quilting 15 on one side does not register with the quilting 16 on the other side. A third or more layers of filling may be incorporated between the fibrous batt layers.
Patent GB-1007740-A (GB)
Title: End-stone unit and a support for time-pieces
IPC: G04B31/008
Filed: 1962-07-31
Abstract: 1,007,740. Bearings. ERISMANN-SCHINZ S.A. July 31, 1962 [Aug. 7, 1961; Jan. 22, 1962; July 5, 1962], No. 29331/62. Heading F2A. In a bearing for a timepiece having a support 1, Fig. 2, in which are mounted a throughstone 2 and an end-stone 4, the latter is retained in an eccentric groove 3 of the support 1 by a bezel 5 which is received by a concentric groove 6 of the support. The end-stone 4 is fitted into an eccentric bore of the bezel 5, which has notches 7 therein for engagement by a tool whereby the assembly is moved angularly to wedge the end-stone 4 against the wall of the groove 3 and to engage a peripheral face 9 of the bezel 5 against the wall of the groove 6. The periphery 9 of the bezel 5 and the wall of the groove 6 are of frusto-conical shape to prevent axial movement due to end-thrust. In a further embodiment, a groove 10, Fig. 4, in the support 1 is concentric, a groove 11 is eccentric and the bore of the bezel is concentric. In another embodiment, a groove 3, Fig. 6, is eccentric, a groove 16 is concentric; the bore of a bezel 12 may be eccentric or concentric; the bezel is stepped at 12a and 12b the, latter being eccentric and received by the groove 3 and the former being concentric and received by the groove 16. In a further embodiment, the end-stone 4, Fig. 8, is fitted in a cap-shaped bezel 14 having a tool slot 14a therein. In another embodiment, the bezel 15, Fig. 9, is stepped at 15a, 15b, the former of which is received by a concentric groove 16 of the support 1 and the latter is received in an eccentric groove 3. The end-stone 4 is received in a bore 17 of the bezel 15, the bore 17 being eccentric to the periphery 15a and concentric to the periphery 15b. The walls of grooves 3, 16 and the peripheries 15a, 15b are of frustoconical shape.
Patent GB-389552-A (GB)
Title: Improvements in brakes
IPC: F16D51/50
Filed: 1931-10-22
Abstract: 389,552. Brakes. BENDIX BRAKE CO., 401, North Bendix Drive, South Bend, Indiana, U.S.A. Oct. 22, 1931, No. 29351. Convention date, Oct. 25, 1930. Addition to 378,542. [Class 103 (i).] In an internal-expanding brake wherein the operating member comprises a floating lever disposed within the drum and having cam members disposed between the ends of the shoes or other friction member, as described in the parent Specification, the anchor for the friction member is wedge-shaped and the ends of the friction member conform to the anchor. A pair of floating shoes 48, 50 pivotally connected by an adjusting member 56 to which they are held by a spring 58 have their free ends notched to conform to a wedge-shaped anchor 14 and have also rounded shoulders 66, 70 for engagement by cams 44, 46 upstanding from a floating-operating lever 36 which straddles the anchor and is disposed within the drum and actuated by a cable 40, kept taut in the released position by a spring 80 attached to the cam 46 and the shoe 50. Release springs 72, 74, 76 for the shoes extend therefrom to the anchor plate and to a projection 30 on the anchor 14. The spring 76 is stronger than the spring 74 so that when applying the brake the shoe 48 is first moved and its end slides along the anchor with a radial movement to engage the drum. With normal counterclockwise drum rotation, the shoe 50 does not leave the anchor and with clockwise rotation the shoe 48 does not leave the anchor. The objectionable click caused by the return of the shoes to the anchor is thus avoided. A retaining plate 32 for the shoes is secured to the anchor.
Patent GB-708339-A (GB)
Title: Process for the production of hydrogen peroxide and the hydrogen peroxide so produced
IPC: C01B15/026
Filed: 1950-11-30
Abstract: In preparing hydrogen peroxide (see Group III) by reacting a secondary alcohol in the liquid state with oxygen at 70 DEG  C. to 160 DEG  C., a ketone is obtained as a by-product.  Thus isopropyl alcohol gives rise to hydrogen peroxide and acetone which may be hydrogenated in the presence of Raney nickel to regenerate isopropyl alcohol.  Methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone are similarly prepared.ALSO:Hydrogen peroxide is prepared by the reaction between a secondary alcohol in the liquid state and oxygen or a gas containing free oxygen at between about 70 DEG C. and 160 DEG C.  Many alcohols are specified, particularly isopropyl and secondary butyl alcohol, cyclic secondary alcohols and unsaturated alcohols. Unreactive substituents may be present in the alcohol, as in monoacetate of hexane 2, 5 diol, 1, 3 epoxy 2 propanol and ethers of glycerol and glycols.  Super-atmospheric pressure may be used.  A small amount of hydrogen peroxide or organic peroxy-compound or carboxylic acid may be added to promote the reaction, and water may be present.  A vessel of aluminium, tin, glass treated with boric acid, or of resin, and having a large volume to surface ratio may be used.  The process may be continuous.