baber/WOPTO huggingface dataset:
Patent GB-667710-A (GB)
Title: Improvements in and relating to the measurement of the modulation characteristics ofamplifiers
IPC: G01R29/06
Filed: 1950-01-17
Abstract: 667,710. Cathode-ray oscillographs; measuring amplification of amplifiers. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Jan. 17, 1950 [Feb. 1, 1947], No. 1257/50. Class 37. The instantaneous variations of the modulus and argument of the coefficient of amplification of an amplifier are determined by direct reading on the screen of an oscillograph by feeding the input and output voltages of the amplifier to the ends of a line along which voltage collecting means are provided at distances .depending on the wavelength at which the amplifier is operating, the voltage collecting means being associated with a load network which supplies two voltages proportional to cos (# -#/4) and sin (# - #/4) respectively, where # is the phase difference between the output and input voltages of the amplifier, these voltages being applied to the deflecting plates of a cathode-ray oscillograph. The amplifier 1 is excited by a source 2 of carrier frequency and is modulated at the electrode 3 by a source 4 of modulating frequency, the output being connected across a load 19. The input and output voltages are fed to the ends of a propagation line 5 such as a wave-guide or a coaxial cable along which are placed three identical quadratic detectors 6, 7, 8, such as crystal detectors, the detector 7 being reversed with respect to the other two. The distances between the detectors are equal to #/8+n #/4, A being the carrier wavelength and n being a whole number which may be zero. The detectors 6, 7, 8 produce across resistances 9 differential voltages which are fed through amplifiers 10, 11 to the deflecting plates of an oscillograph 12. A polar curve 20 is produced the vector radius of which, for a constant input voltage to the amplifier, is proportional to the output voltage, i.e. to the modulus of the gain, while the angle between this radius and a datum axis determines the phase difference #, i.e. the argument nf the gain. A phase-shifting circuit 14 is fed from the modulating source 4 and its output is fed to a symmetrical amplifier 15 with grids heavily biased so that impulses 180 degrees apart are obtained alternately in opposite directions. These are amplified at 16 and applied to the Wehnelt electrode of the oscillograph so as to produce a spot ml of increased luminosity and a spot m2 of decreased luminosity which locate points on the curve with respect tn the modulating voltage.
Patent GB-100041-A (GB)
Title: Improvements in or relating to Buttonhole Sewing Machines.
IPC: D05B65/00
Filed: 1916-01-27
Abstract: 100,041. United Shoe Machinery Co., (Assignees of Hill, G. S.). Jan. 28, 1915, [Convention date]. Thread - cutters and thread - end holders for needle threads are provided under the work plates of button-hole sewing-machines comprising an upper needle and a rotary turret carrying complementary understrand mechanism. The invention is shown applied to a machine such as is described in Specifications 13877/12, 3293/13, 15777/13, 3177/14, and 24523/14. A lever 26 has a sharpened thread-cutting end 24, and a finger 32 which forms one part of a thread clamp. The lever is mounted upon a pin 28, and upon the same pin there is mounted a second lever 36 having a finger 34 which clamps the thread upon the finger 32. Both levers are held from operation against the pull of springs by a ring cam 38 which engages tail-pieces of the levers. At the close of a stitching operation, the tail of the lever 26 has passed into the region of a gap 56 in the cam 38 but is restrained by engagement with a lever 48 which virtually forms a continuation of the cam 38. The tail of the lever 36 is just upon the edge of the cam 38 before the gap 56. As the clampplate moves to bring the clamp to buttonhole-cutting position, a lug 52 upon it turns the lever 48 and permits the lever 26 to swing into the recess 56 as shown. This carries the cutting end of the lever forward, and the thread is cut close to the work. At the commencement of the next stitching cycle, the needle thread is carried by the looper over the finger 32, and upon the first rotary movement of the turret the lever 36 swings into the gap 56 and its forward end closes on to the needle thread where it passes over the finger 32. The thread-end is then held by the fingers until the movement of the turret carries it away from them.
Patent GB-445732-A (GB)
Title: Amusement apparatus
IPC: A63G25/00
Filed: 1935-01-15
Abstract: 445,732. Electrically - propelled bicycles. MARKEY, F. L., loka Theatre Building, Exeter, New Hampshire, and STOEHRER, H., Braden Castle, Manatee, Florida, both in U.S.A. Jan. 15, 1935, No. 1368. [Classes 79 (iii) and 136 (iii)] [See also Groups XV and XXXII] The invention relates to amusements for example, as described in Specifications 177,395, [Class 132 (i)], 346,621, and 381,990, wherein vehicles steered freely over an electrically charged floor by the passengers are driven by electric motors fed from the floor and an electrically charged ceiling. According to the invention the vehicles simulate bicycles. In the embodiment shown, the vehicle comprises a platform 1 secured by brackets 6, 7 to a motor cycle frame F, the rear wheel 5 of which is disposed in a slot 5<a> in platform 1 and is driven through chain gearing 8, 9 ... 14 by an electric motor 15. A friction clutch comprising a sprocket wheel 12, Fig. 5, loose on shaft 11 which it drives through friction discs 11<a>, 12<a> adjusted by means of a spring 12b, is provided in the motor drive. The dirigible wheel 4 controlled by the handlebars H is located in a slot 4<a> in the platform provided with anti-friction rollers 4b to engage the wheel 4. The platform 1 is also provided with castors 3 which may serve instead of the usual shoe to collect current from the floor B, current from the charged ceiling being collected bv a trolley arm T. the motor 15 is controlled by series connected switches 17 closed by depressing the foot rests 16. The enclosure is limited by buffers B\ adapted to engage rollers 25, and/or guards 27, Fig. 8, located beneath the platform of a car. For collisions between cars the platform 1 is surrounded by a resilient bumper 2 and may have at one end a heavy rubber bumper 22, Fig. 8, secured by a strap moulded therein and bolted to the platform.
Patent GB-527903-A (GB)
Title: Improvements in or relating to internal combustion engines operating on the two-stroke cycle with liquid fuel injection
IPC: F02M69/00
Filed: 1939-01-17
Abstract: 527,903. Fuel-injection engines; regulating. RICARDO, H. R. Jan. 17, 1939, No. 1558. [Classes 7 (iii) and 7 (vi)] In a two-stroke sleeve-valve engine with endto-end scavenging and operating with injection of liquid fuel ignited always by spark, the fuel injector J is located at the end of the cylinder adjacent the spark-plugs G so as to produce a fuel spray which is coaxial with the cylinder and is timed to mingle with the entering air during the latter part of the scavenging period. The timing of the injection may be varied so as to commence earlier with increase of load, but to cease at the same timing for all loads. Fig. 1 shows a sleeve valve E with ports E<1> controlling scavenging-air inlets B, its upper edge controlling exhaust ports D. The combustion chamber may be conical as shown, or bulbous, and the piston face may be dished. The fuel pump may have two cylinders operated by cams at 180 degrees apart and driven at half-speed. The timing of the pump may be regulated automatically by a bellows subjected to the pressure of the scavenging air.
Patent GB-347207-A (GB)
Title: Improvements in or relating to electrodes for resistance welding and method of making same
IPC: B23K35/40
Filed: 1930-01-16
Abstract: 347,207. Electrodes for resistance welding ; resistance furnaces. FANSTEEL PRODUCTS CO., Inc., near Sheridan Road, North Chicago, U.S.A.- (Assignees of Austin, M. M. ; of Fansteel Products Co., near Sheridan Road, North Chicago, U.S.A.) Jan. 16, 1930, No. 1568. Convention date, Jan. 17, 1929. [Class 39 (iii).] Finely divided particles of a hard refractory metal are manually tamped or otherwise gently compacted in a mould and heated to or slightly above the temperature of a soft, ductile metal which is then applied thereto to form an electrode capable of withstanding high pressures and temperatures. The use of high pressures and the step of sintering or fritting the mass are entirely avoided during the process of manufacture. The process is carried out in a hydrogen atmosphere in a furnace comprising a porous alundum cylinder 13 wound with a molybdenum coil 15 and arranged in a cast-iron box 19 containing magnesia 18 and fitted with hydrogen supply pipes 20. Tungsten powder is tamped in a graphite crucible 11. A pure copper wire 24 is fed to the heated tungsten until an excess of copper remains at the surface. From 25-45 per cent of copper by weight is present in the finished article. The operating temperature is about 1150‹-1200‹ C. Molybdenum, columbium, chromium or tantulum may be used instead of tungsten and silver or silver alloy may be used instead of copper.
Patent GB-703418-A (GB)
Title: Manufacture of vanillin
Filed: 1951-01-22
Abstract: A method for producing vanillin from a lignin-containing waste liquor from a wood pulping process which liquor has been rendered alkaline, comprises subjecting the alkaline liquor to the action of air or oxygen at a temperature above about 200 DEG  C. and a pressure above about 1,000 lb. per sq. in. for a time not exceeding about 10 minutes, cooling the treated liquor and separating vanillin therefrom.  The starting material may be an alkaline waste sulphite liquor or black liquor from the Kraft process or soda pulping process.  The process may be carried out continuously using a reaction vessel through which the liquor flows as a thin film and has a large surface exposed to the air passing through the reactor. Generally, the liquor or the air or oxygen or both are heated prior to introduction into the reaction vessel.  Adiabatic compression of the air may be employed if desired.  Gaseous products and oxidized liquor are withdrawn continuously from the reaction at a rate such that the liquor remains in the reaction zone for not more than 10 minutes and the latter is cooled as rapidly as possible, e.g. by sudden reduction of pressure and evaporation of part of the water. The vanillin may be recovered from the processed liquor, e.g. by extraction with a water immiscible alcohol, i.e., n-butanol, and purified by vacuum distillation and recrystallization.  Nitrogen may be recovered from the gaseous effluent.  The waste liquor may comprise sulphite liquor from the pulping of various species of wood, such as spruce, hemlock and balsam.  Sulphite liquors from deciduous woods, e.g. aspen or birch give syringic aldehyde in addition to vanillin.  Sulphite waste liquors in which the sugars have been fermented to alcohol or for propagating yeast may be used as starting material.  In the example a continuous process using air and alkaline sulphite waste liquor as starting materials is described. Specification 490,646 is referred to.
Patent GB-535872-A (GB)
Title: Improvements in electric stoves
IPC: A47J37/06
Filed: 1940-01-27
Abstract: 535,872. Electric heaters. PEARL INDUSTRIES, Ltd., and WINSTON, T. Jan. 27, 1940, No. 1679. [Class 39 (iii)] An electric stove applicable for toasting, cooking or room heating, comprises a rectangular sheet metal casing 1 with a circular opening in the top through which an electric heating element is exposed. A rectangular wire grid 4 is provided with cross bars 5, 6, 7 having feet 8 resting on the casing. Extended portions of one side of the grid 9 are bent down and engage at 9a in holes in the casing walls so as to form hinges about which the grid may be turned clear of the top of the casing, when not required to support cooking utensils. The grid carries two U-shaped members 10, 11 hinged about the cross bars 5, 7 so that they may occupy a horizontal position supported by the bar 6, or be turned into inclined position as shown to support bread to be toasted. For quick boiling the grid 4 may be turned back and utensils placed on the casing 1 close to the heating unit. When the stove is required to serve as a radiator, the grid 4 is turned round until it occupies a position at right angles to, and below, the base, so that the stove may then rest on one edge of the casing and the projecting grid, with its upper surface inclined and facing in an upward direction.
Patent GB-388905-A (GB)
Title: Improvements in devices for re-sharpening razor blades
IPC: B24D15/08
Filed: 1932-01-20
Abstract: 388,905. Sharpening razors. LAWRENCE, G. F., 216, Goswell Road, London. Jan. 20, 1932, No. 1715. [Class 60.] A sharpener for razor blades comprises two frames 1, back to back and connected at their ends by plates 13, each of which is formed from a piece of metal to the section shown in Fig. 2, and holds sharpening strips 5, which may be of glass, stone, metal, fibre, leather, &c., and may be coated or impregnated with a fine abrasive, The strips are inclined as shown, and in the frames are formed longitudinal slots 6, which expose the operative surfaces of the strips. A blade carrier 8 is provided for each unit comprising a body part having sides 10 and ends 12, which engage the holes in a blade, and the carriers are united by a rivet 11 passing through a slot 9 in the frames. In operation, a blade 7 is placed on a carrier, is depressed so that its edges lie against the strips 5, and is moved with the carrier to and fro along the strips. One pair of strips 5 may be arranged for honing and the other for finishing, and the slot 9 may be sinuous to give transverse movement also to the blade; one pair of strips and one frame only may be used. The device may be modified for use with single edged blades, either one or two strips then being employed.
Patent GB-415324-A (GB)
Title: Process for waterproofing or filling cavities in the ground or in structures
IPC: C09K17/48
Filed: 1934-01-18
Abstract: 415,324. Waterproofing. FRANCOIS CEMENTATION CO., Ltd., 701, Salisbury House, London Wall, London.-(Assignees of Travaux Souterrains ; 36<bis>, Avenue de l'Opera, Paris.) Jan. 18, 1934, No. 1804. Convention date, June 2, 1933. [Class 140.] For waterproofing ground or masonry, e.g. dikes or dams, an emulsion of bitumen, asphalt, resin or like solid material is injected simultaneously with a separate injection of binding material such as cement, lime, plaster, &c. so that the emulsion is not only coagulated by the binding material but is embedded therein as it leaves the injection tube to form a mass of fibrous or cellular structure. The emulsion may be sprayed through a central tube with one or more small orifices, and the binding material through an outer concentric tube, the binding material embedding the emulsion before leaving the outer tube.
Patent GB-1523971-A (GB)
Title: Foot exercise sandal
IPC: A43B7/26
Filed: 1976-01-16
Abstract: 1523971 Sandals SCHOLL (UK) Ltd 16 Jan 1976 [17 Jan 1975 22 March 1975] 01831/76 Heading A3B A foot exercise sandal comprises a sole 1 whose upper surface includes a ridge 3 extending in use, under the arches of at least the second to fourth toes, increasing in height to the second toe and dropping downwardly, at 4, in the region of the big and second toes to merge into a depression 5 for the ball of the big toe and a flattened portion for the toe, the sole upper surface being held in engagement with the sole of a wearer's foot by a strap 7 over the wearer's instep. The ridge 3 preferably extends from the outer side of the sole i.e. the little toe side and the downwardly extending portion 4 of the ridge may be at the outer face of the big toe, at the inner face of the second toe or between these toes. The ridge may become broader towards the portion 4. In one form, Fig. 3 the portion 4 is inclined to the vertical from its upper end to the flattened portion and in another form, Fig. 5 (not shown) the portion 4 has a rounded upper end which merges into a groove (4') at its lower end which slightly undercuts the ridge and merges with the depression 5. A shallow depression is preferably provided in front of the ridge 3 for the ends of the toes and a shallow heel depression and an arch corresponding to the foot arch are provided. The sole 1 is substantially rigid, is preferably of one piece and may have a heel. There is a covering 6 on the sole lower face to the bottom surface of which a coating e.g. non slip material may be applied. All or part of the sole upper face may carry a resilient layer. The strap 7 is positioned behind the ridge 3 and may be of two pieces, as shown, secured together by a buckle or press studs and may be permanently screwed or nailed to the sole or may be changeable for a different strap, then fixed by press studs to the sole.
Patent GB-1186333-A (GB)
Title: Recovery of Epoxy Compounds from Admixture with Carboxylic Acids
IPC: C07D301/32
Filed: 1968-01-12
Abstract: 1,186,333. Recovery of epoxy compounds. CELANESE CORP. 12 Jan., 1968 [13 Jan., 1967], No. 1858/68. Heading C2C. Epoxy compounds are recovered from mixtures with carboxylic acids of greater water solubility by solvent extraction simultaneously with an aqueous solvent and an organic solvent immiscible with the aqueous solvent. The aqueous solvent used may be water alone but can be an aqueous solution of a metal salt e.g. the sodium or potassium salt of the acid being separated or water-soluble sulphates, borates, phosphates, nitrates, oxalates and chlorides. The organic solvent employed may be an excess quantity of the olefinically unsaturated hydrocarbon used as raw material in the epoxidation process, or may be, e.g. propane, propylene, butane, pentanes, hexanes, heptanes, cyclic homologues of the foregoing, toluene, xylene, ethers, chlorinated solvents, high molecular weight esters, carboxylic acids and glycerides. Examples describe the separation of the epoxy derivative of 1,2- C 14  alkane from acetic acid and ethyl acetate and propylene oxide from acetic acid, propylene, propane and ethyl acetate.
Patent GB-220019-A (GB)
Title: Improvements in electric switches
IPC: H01H33/14
Filed: 1923-11-20
Abstract: 220,019. English Electric Co., Ltd., and Bolton, R. A. R. Nov. 20, 1923. High-potential switches, specially adapted to deal with heavy alternating currents, have a group of contact members connected in parallel arranged round a central contact member and a group of insulated leading in conductors from one switch terminal arranged round a central insulated conductor connected to the other terminal. According to the construction shown in Fig. 1, current enters the switch by an insulated tubular conductor 6 and leaves by three insulated conductors 10 arranged in a circle round the conductor 6 and mechanically and electrically tied together at top and bottom by members 12. 9. The member 9 is connected to a ring 14 connected by three strips 13 to a circle of eight contact fingers 8 which are fixed on a tube 15 on the lower end of a switch operating rod' 18 and which contact with a fixed ring contact 7 on the conductor 6. An additional path for the current is provided from the member 9 to a contact 17 and thence to the tube 15 and contacts 8. In the modification shown in Fig. 3, there are four conductors 9, connected by a ring 12 and surrounding the conductor 6, and there are four switch arms 8 pivoted at 10 and contacting with the contact 7 on the conductor 6. The operating rod 18 has fixed to it a sleeve 20 which slides on the conductor 6 and by means of links 25 actuates the arms 8.
Patent GB-939019-A (GB)
Title: Diphenyl methane derivatives and methods for the preparation thereof
Inventor: TEMPLE RICHARD WILLIAM
IPC: C07D211/34
Filed: 1959-01-19
Abstract: The invention comprises compounds of the formula <FORM:0939019/IV(a)/1> (wherein R1 is alkyl of at most 4 carbon atoms, R2 is hydrogen or methyl and R3 is hydrogen or alkyl of at most 4 carbon atoms) and pharmaceutically acceptable acid-addition salts thereof, and their preparation as acid-addition salts (1) by reducing acid-addition salts of compounds of the formula <FORM:0939019/IV(a)/2> to give products wherein R2 is hydrogen, which products may then be N-methylated by hydrogenation in ethanolic solution in the presence of Adams platinum catalyst and formaldehyde or by heating (as free bases or salts) in aqueous solution with formic acid and formaldehyde and, when R3 is hydrogen, sodium formate.  The reduction may be effected with hydrogen in dry methanol or ethanol in presence of Adams platinum catalyst at 20 to 50 DEG C. and 1 to 10 atmospheres.  Acid-addition salts, e.g. hydrochlorides, and free bases may be interconverted by conventional methods. Detailed examples are provided.  The piperidine derivatives of the invention, which are stated to possess analgesic properties, may be made up into pharmaceutical compositions.  A tablet containing ethyl 1,1-diphenyl - 2 - (21-piperidyl) - propionate hydrochloride is described.  Specification 930,459 is referred to.
Patent GB-1103803-A (GB)
Title: Variable area jet engine air intake
IPC: F02C7/042
Filed: 1966-01-14
Abstract: 1,103,803. Jet propulsion plant. BOEING CO. Jan. 14, 1966 [Jan. 15, 1965], No. 1921/66. Headings F1G and F1J. A circular, elliptical, semi-circular or semielliptical air intake for a jet engine, e. g. turbojet, pulse jet or ram jet, has a core with laterally expandable and contractible parts 4, 5, 6 for varying the width of the air inlet passage. The core is shown in its fully expanded position in which a throat 9 is formed. In the fully contracted position the cross-sectional area of the air inlet passage is substantially constant throughout its length. The walls of the core parts 4, 5, 6 are formed from a number of overlapping strips 10, 11, the edges of the strips 10 having deep grooves into which the strips 11 are telescoped, Figs. 9 to 14 (not shown). The strips 10 each have an inwardly extending strengthening rib to which is attached a toggle member 15 at the junctions between the core parts 4, 5, 6. Additionally, each toggle member 15 is attached to slides 18 movable along a stationary core support sleeve 7 to expand or contract the core. The slides 18 are moved by a reciprocable thrust rod 19, Figs. 4 and 6 (not shown), inside the sleeve 7 by a pneumatic or hydraulic jack 22. The jack may positively move the thrust rod in both directions, or the core expansion direction only in which case the pressure of the incoming air in the cowl 1 forces the core back to its contracted position. The jack may be replaced by a screw and nut actuator. The thrust rod may be moved manually or automatically in accordance with velocity, or static pressure in the cowl 1, engine power requirements or power lever setting. The core may be contracted when the aircraft exceeds Mach 1 by a predetermined amount, or when the power requirements are less than half that available and thereby reduce compressor noise. At supersonic aircraft speeds with the core fully expanded, shock waves are deflected at a sufficiently small angle from the tip of the nose cone 2 to extend inside the cowl lip 3 and thence are reflected back and forth between the cowl and core, see dash lines in Fig. 2 (not shown), until they are substantially normal to the air flow and at sonic velocity in the throat 9. The cowl may have relief valves and/or bypass doors downstream of the throat 9.