baber/WOPTO huggingface dataset:
Patent GB-660437-A (GB)
Title: Improvements in or relating to air preheater systems
IPC: F28D19/04
Filed: 1949-07-11
Abstract: 660,437. Heating air for combustion. AKTIEBOLAGET LJUNGSTROMS ANGTURBIN. July 11, 1949 [July 19, 1948], No. 18251/49. Class 64(i) In an air-heating system in which hot exhaust gases heat air in a heat-exchanger 10 and the cold air inlet duct 15, 20 containing a blower 18 is connected to the heated air outlet duct 25 by a recirculation duct 30 and a byepass duct 35, single control means, e.g. a lever 60, operate dampers 50, 40 in the ducts 30, 35 in sequence. By opening first the damper 50 to its full extent and then the damper 40, the cooling effect of the air on the hot gases in the heat exchanger can be reduced so that they are kept above their dew point, to prevent corrosion. The lever 60 actuates the dampers 40, 50 by slotted links 46, 56 acting on levers 42, 52 by slotted terweights 43, 53. Operation of the lever 60 may be manual or automatic, in response to changes in the temperatures of the air entering the heat exchanger and of the exhaust gases leaving it. A damper 31 in the recirculation duct 30 closes automatically as the blower reaches its full capacity.
Patent GB-251810-A (GB)
Title: A locksmith's instrument to open all standard makes of cylinder locks
IPC: E05B19/20
Filed: 1925-07-17
Abstract: 251,810. Baron, G. J. July 17, 1925. Instruments for releasing lock-mechanisms.- A device for releasing radial pin-tumbler lockmechanisms comprises a serrated plunger resiliently held in a stock. In the form shown in Fig. 4, the stock 1 carries a plunger with a serrated protruding end 7, a spring-surrounded shank 2, and a head 10. The end 7 is inserted into the keyhole until the face of the stock abuts on the lock. The end 10 is then tapped with a mallet while a turning movement is applied by hand to the stock. Eventually the upward movements of the pin-tumbler under the impacts imparted by the teeth 9 of the instrument will enable the lock mechanism to be released. Resilient pads 13 may be provided on the end face of the stock. If tho part 7 protrudes too far from the stock, the distance-cap 14 with resilient inserts 16 may be used. The spring 6 and casing 1 may be replaced by a stock of springy material 19 such as cork or rubber, with a metal cap 18 to receive the blows of the mallet.
Patent GB-516531-A (GB)
Title: Improvements in or relating to electric circuit-breakers of the air-blast or gas-blast type
IPC: H01H33/74
Filed: 1938-06-21
Abstract: 516,531. Gas - blast switches. REYROLLE & CO.. Ltd., A.; and ALLAN, A. June 21, 1938, No. 18389. [38 (v)] A circuit-breaker comprises a contact housed in an enclosure having two or more discharge vents in its wall, a co-operating hollow moving contact so arranged that the arc is drawn out within the enclosure past the vents, all of which are lateral to the arc path and have their inner ends or throats in alignment, and means whereby gas is forced under pressure through the contact and arc path and out through the vents, the portion of the enclosure from which the latter extend being substantially filled by the moving contact in the closed position of the breaker. The gas employed may be air, nitrogen, carbon dioxide, argon, or a gaseous fluorinated alkyl chloride, such as difluoro-dichloro-methane. In Figs. 3, 4, the enclosure G is contained in a tubular casing D and comprises a stack of insulating plates G secured together by suitably insulation - shrouded longitudinal bolts G<1> and centrally apertured so as just to take the hollow movable contact C. One segment A' of the fixed contact structure A is slightly longer than the others so as to draw the arc on the side of the enclosure against the vents G<2>, two of which are shown. The vents may extend in vertical alignment radially from the central aperture in the plates, as in Fig. 4, or they may be radially arranged but offset alternately on either side of a central plane passing through that aperture, Fig. 5 (not shown), or they may be curved and arranged tangentially to the aperture and directed alternately to opposite sides of such a central plane. The rest of the descriptive part of the Specification and drawings, Figs. 1, 2 and 7 - 10 (not shown), appear, with slight modifications in detail, in one or more of Specifications 516,529, 516,530 and 516,532.
Patent GB-558945-A (GB)
Title: Improvements in and relating to snap fasteners for securing moulding and like strips
IPC: F16B5/12
Filed: 1942-12-29
Abstract: 558,945. Snap fasteners. UNITED CARR FASTENER CORPORATION. Dec. 29, 1942, No. 18466. Convention date, Dec. 9, 1941. [Class 44] A snap fastener for securing a moulding strip 4 to an apertured support 1 comprises a head shown as of H form, in inverted plan view, Fig 3 the central portion 7 being bent to provide a groove in which a moulding rib or projection 12 is received and held by the free ends of opposed downwardly bent tongues 8 stamped out of marginal portions of the limbs 6 which are bowed, Fig. 4. Integral spring tongues 9 'are shaped, to provide depressions 11 which snap into engagement with the edges of the aperture 2 in support 1.
Patent GB-1263569-A (GB)
Title: Improvements in or relating to a method of conditioning a natural hydrocarbon gas
IPC: F17C1/00
Filed: 1969-04-10
Abstract: 1,263,569. Storing liquefied gas. TECHNIGAZ. 10 April, 1969 [22 May, 1968], No. 18466/69. Heading F4P. Natural hydrocarbon gas is cooled to below its critical temperature and is liquefied by compression to between 2 and 5 atmospheres pressure and the LNG is stored in a stationary or a portable heat insulated container prior to delivery into revaporizing apparatus and thence into a consumer line. The container may be spherical or cylindrical in shape and is of selfsupporting material e.g. steel or reinforced or prestressed concrete having a thin flexible fluid tight metal inner lining backed by heat insulation material.
Patent GB-1311255-A (GB)
Title: Preparation of instnat tea
IPC: A23F3/16
Filed: 1971-06-02
Abstract: 1311255 Instant tea UNILEVER Ltd 2 June 1971 [2 June 1970] 18578/71 Heading A2B Cold water insoluble tea solids (tea cream) which have been separated from an extract obtained by hot water extraction of tea leaf are rendered cold water soluble by oxidising them in aqueous dispersion at a pH of 9 to 10, for example by means of air, and there after treating the resulting solution with a compound selected from sulphur dioxide, sulphurous acid, a sulphate, or a bisulphite. The product may be returned to the extract and the whole dried to give an instant tea.
Patent GB-220004-A (GB)
Title: Improvements in methods of and apparatus for signal reception
IPC: H04B1/26
Filed: 1924-08-05
Abstract: 220,004. British Thomson-Houston Co., Ltd.; (Assignees of Carlson, W. L.). Aug. 3, 1923, [Convention date]. Heterodyne receiving systems.-The invention is distinguished from the usual heterodyne or harmonic-heterodyne systems in that a local source is used having a frequency in the neighbourhood of half the signal frequency and having a value which can be expressed as a low integral fraction of the signal frequency. For example with a signal frequency of 1,000,000 per second, local oscillations of 540,000 or 460,000 are related to the signal frequency in the ratio 50 to 27 to 23 respectively, and both will give rise to a resultant current which exhibits fluctuations in amplitude recurring once in every fifty cycles of the signal frequency, so that the resultant current has a frequency of 20,000 cycles. Fig. 3 shows at C, D, E and G typical characteristics of the derived current from a signal frequency B and a local frequency A corresponding to different phase-relationships between the two components. The negative half-cycle of curve C is less in amplitude but of longer time interval than the positive half-cycle, whilst in curve E this feature is reversed. Such voltages when applied to a tube having a characteristic curve of the form shown in the upper part of Fig. 3, will result in equal increases in plate current for the positive half-cycles and in different decreases during the negative half-cycles, corresponding to the varying forms of curves C, D, E. The actual waveform produced by combining a signal current L with a local oscillation M is shown at K in Fig. 4. The characteristic feature of the wave-form K lies in the fact that successive half-cycles of one polarity change in amplitude in the reverse direction to successive half-cycles of the other polarity, so that the mean amplitude remains constant. In the receiving system shown in Fig. 1, local oscillations from a source 5 are fed to the grid circuit of a detector tube 4, the plate circuit of which is tuned by a condenser 6 to the desired resultant frequency. Alternatively, the combined current may have an ultra-audible frequency which is amplified and subsequently rectified to produce the same result as in the socalled super-heterodyne system.
Patent GB-1413004-A (GB)
Title: Fixing devices
IPC: F16B37/04
Filed: 1973-04-18
Abstract: 1413004 Wall plugs PLAS PLUGS Ltd 9 April 1974 [18 April 1973] 18636/73 Heading F2H A wall plug for use in securing a panel 12 to a substrate 14, e.g. a batten, comprises a tubular body 2 radially expansible by the insertion of a screw 16 or other fastener and having external ribs or projections 4 to engage the wall of a bore through the substrate 14, the leading end of the body 2 having at least two legs 8 which in use project beyond the rear face of the substrate, each leg having at least one finger or barb 10 attached to its free end and lying approximately parallel to the leg, the fingers being stiffly flexible so that if the body 2 becomes dislodged from the substrate bore, the fingers 10 are deflected radially outwardly behind the substrate to prevent complete withdrawal of the plug and screw from the substrate. The body 2 has longitudinal slots 5 and an end flange 6. The tips of the legs 8 together form a dome to facilitate insertion of the plug in the substrate aperture.
Patent GB-497244-A (GB)
Title: Improvements in or relating to rotary card cutting machines
IPC: B26D7/18
Filed: 1937-07-06
Abstract: 497,244. Cutting blanks. CO-OPERATIVE WHOLESALE SOCIETY, Ltd., and ROBERTS, S. W. July 6, 1937, No. 18719. [Class 31 (i)] [Also in Group XVII] In a machine for cutting and creasing card blanks, the waste portions of the blanks are removed by a member e which rotates in time with the cutting and creasing rollers and is provided with a lug f, the latter pressing the waste portion of a blank i through an aperture h in a stationary plate g. The leading and trailing edges of the aperture h are cut-away to clear the sweep of the lug. The cylinder is driven from the cutting roller by a belt d and it is provided with a recess e<1> to accommodate the leading end of the blank if the latter arrives in a bent state.
Patent GB-1353445-A (GB)
Title: Support for image receiving material
IPC: G03C8/52
Filed: 1972-04-21
Abstract: 1353445 Polyvinyl butyral compositions FUJI PHOTO-FILM CO Ltd 21 April 1972 [22 April 1971] 18760/72 Heading C3P [Also in Divisions B2 and G2]  In examples, specific fluorescent brightening agents (identified by trade names and Colour Index numbers) are incorporated in polyvinyl butyral resins.
Patent GB-857649-A (GB)
Title: Improvements relating to thiocarbonyl fluoride polymers and their production
IPC: C01B31/26
Filed: 1958-06-12
Abstract: Polymers, or copolymers, of thiocarbonyl fluoride having recurring -SCF2- units and having molecular weights at least 2000 are prepared by polymerizing thiocarbonyl fluoride containing less than 5% sulphur- or fluorine-bearing non-polymerizable impurities, with, or without, an ethylenically unsaturated monomer e.g. 1-95% tetrafluoroethylene, or vinyl fluoride.  Polymerization may be bulk or solution polymerization at -50 to 150 DEG C. in the presence of free radical addition polymerization initiators, e.g. a  a 1-azodiisobutyronitrile, or anionic initiators, e.g. sodium cyanide, triphenyl phosphine, or sodium cyanide in solution in N, N-dimethyl formamide.  The polymers vary from low molecular weight waxy solids of m.pt. 35 DEG C. soluble in chloroform to yield coating solutions, to high m.pt. materials, which can be pressed to rubbery films. Specifications 857,650 and 857,651 are referred to.ALSO:Polymers, or copolymers, of thiocarbonyl fluoride having recurring -SCF2- units and having molecular weights at least 2000 are prepared by polymerizing thiocarbonyl fluoride containing less than 5% sulphur- or fluorine-bearing non-polymerizable impurities with, or without, an ethylenically unsaturated monomer, e.g. 1-95% tetrafluoroethylene, or vinyl fluoride.  Polymerization may be bulk or solution polymerization at -50 to 150 DEG C. in the presence of free radical addition polymerization initiators, e.g. a a 1-azodiisobutyronitrile, or anionic initiators, e.g. sodium cyanide, triphenyl phosphine or sodium cyanide in solution in N,N-dimethylformamide.  The polymers vary from low molecular weight waxy solids of m.pt. 35 DEG C., soluble in chloroform to yield solutions suitable for coating, to high m. pt. materials which can be pressed to rubbery films. Specifications 857,650 and 857,651 are referred to.
Patent GB-701273-A (GB)
Title: Process for the filtration of metal melts
IPC: C22B9/02
Filed: 1951-08-10
Abstract: 701,273. Filtering molten metals. DEUTSCHE GOLD - UND SILBERSCHEIDEANSTALT, VORM. ROESSLER. Aug. 10, 1951 [Aug. 10, 1950], No. 18889/51. Class 46 A metal melt especially of metals sensitive to oxygen, e.g. alkali metals, zinc, aluminium and alloys thereof, lead, magnesium, sodium, silver and alloys thereof is filtered for the removal of solid impurities, e.g. oxides or for the separation of segregated intermetallic phases by flowing under its own hydrostatic pressure from a first chamber to a second chamber through a filter constituted by a porous partition or porous mass forming the separating wall between the chambers, the level of the filtered metal in the second chamber being so adjusted that the metal emerges from the filter below the surface of the filtered metal. As shown, the chamber B for the filtered melt N and the chamber A for receiving the crude melt N are arranged side by side and are separated by a porous filter device F forming the whole or part of the lower portion of the separating wall W. Alternatively, the filter F may consist of loosely piled material deposited at the lower end of the wall W. The surface of the filtered melt N is maintained at the level of an overflow L. In an alternative apparatus the container for the crude metal is closed at the bottom by a porous filter device and is located in the filtered metal receiving chamber with the filter bottom below the overflow. The crude metal may be introduced to the filter chamber directly by means of an overflow or lower inlet depending upon the ratio of specific weights of the melt and solid components. The porous filter in the form of plates may consist of calcined aluminium silicate, quartz or aluminium oxide and the loose filter material may consist of quartz, aluminium oxide, calcined aluminium silicate, spinels, coke or magnesium oxide and may be retained by vertical perforated ceramic or metal plate-like structures. For the separation of segregated intermetallic phases, filters of metallic material made in the form of porous plates by methods of powdered metallurgy or in the form of loose heap metal powders, preferably coarse grained, are used. The filter may be made with layers of different pore sizes made by use of filter materials of different granular sizes.
Patent GB-1029303-A (GB)
Title: Improvements in or relating to pulse code modulation signalling systems
Inventor: DAVIS JOHN CHRISTOPHER HAMMOND
IPC: G11C11/403
Filed: 1962-05-16
Abstract: 1,029,303. Transistor pulse circuits. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. May 8, 1963 [May 16, 1962], No. 18900/62. Heading H3T. [Also in Division G4] In a pulse code modulation system, at the coder, Fig. 1 (not shown), an incoming signal is supplied via terminal S to a comparator C controlled by timing pulses ST, the comparator output being used as the digital signal and also controlling via gates G1 to G6, opened in succession by pulses T2 to T7, capacitive digit stores S1 to S6 which in turn control the connection of suitably related, e.g. binary weighted resistors through analogue switches, shown as block AS. Pulse T8 sets the first store S1 and resets the remainder and during pulse T2, S1 is reset via gate G1 if an output is obtained from the comparator, and S2 is set and so on. In accordance with the set or reset conditions of the stores the current to balance the signal is adjusted in progressively smaller binary steps, the last pulse T7 controlling the appropriate switch in AS directly. Fig. 2 shows details of the store for one stage on the right of the dotted line, equipment on the left being common to all the stages. Rectifier MR1 and transistor VT5 are part of a multi-outlet switch, similar components being provided for the other stages. During timing pulse TX (corresponding to stage X) transistor VT5 conducts and charges capacitor C11 via resistors R7, R10 producing a waveform at point A as indicated on the left of the Figure. This potential is supplied to the base of transistor VT13 which conducts and supplies an output at terminal OP to operate the corresponding analogue switch. Transistors VT3 and VT6 form part of another multi-outlet switch and when timing pulse T(X + I) is applied to the base of VT6 it will conduct only if the input M, i.e. the output of the comparator C, at the base of transistor VT3 has the more negative value. If VT6 conducts, the capacitor C11 is discharged and the analogue switch is opened again. Otherwise the analogue switch remains closed. At the end of the coding cycle timing pulse T8 causes transistor VT8 to conduct and discharge capacitor C11 and similarly for the remaining stages. For the first stage S1 the timing pulse T8 is arranged to reset the store by arranging that transistor VT8 is of the complementary type to that shown and the transistor VT5 is omitted.
Patent GB-1466868-A (GB)
Title: Granulation of materials
IPC: C11D3/06
Filed: 1973-04-19
Abstract: 1466868 Tripolyphosphates; preparation of porous granules UNILEVER Ltd 17 April 1974 [19 April 1973] 19038/73 Heading C1A Porous granules of alkali metal or ammonium tripolyphosphate having diameters in the range 0À3 mm. to 3À0 mm. are prepared by rotating the compound in the form of a powder with a particle size below 0À3 mm. with a liquid binder, in an apparatus having a horizontal rotatable baseplate positioned at the base of a substantially vertical cylinder, followed by the drying of the granules, preferably to give the anhydrous material. The drying of the granules is carried out preferably above 135‹ C. and preferably with agitation. The granules, which are suitable for inclusion in detergent mixtures, can be used as substrates for the incorporation of enzymes, non-ionics and dibutylphthalate into the detergent compositions.
Patent GB-1186347-A (GB)
Title: Improvements in or relating to Liquid Scintillation Counters
Inventor: STUBBS ROBERT DENISON
IPC: G01T1/204
Filed: 1966-04-29
Abstract: 1,186,347. Liquid scintillation counters. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. March 23, 1967 [April 29, 1966], No. 19060/66. Heading G1A. Liquid scintillation counter apparatus, having interlocking shutter devices to permit a bottle (containing the scintillator and isotope under investigation) to be changed without exposing the photo-multiplier to ambient light, is provided with a passageway through the external shielding of the apparatus into which the carrier of a sealed γ-source can be inserted for measurement of the counting efficiency of the apparatus by the "external standard" method. The external shielding comprises well member 1, enclosing the photo-multiplier 10 and defining part of a chamber 7, the top part of which is defined by shielding lid 2 hinged at 4. The shutter devices referred to above are a shutter 18, between the photo-multiplier 10 and the bottle carrier 11, and a cover 14, hinged at 15, which, when closed, excludes external light from the bottle located in the carrier 11. When the lid 2 is lifted, the plug 22 in the lid, is brought out of engagement with a plate 21 integral with stud member 20. The bottle carrier 11, biased upwardly by a spring 13, is now free to move upwards (to position of Fig. 2, not shown). To free cover 14 for lifting, a catch 16 is turned, which causes simultaneous movement of the shutter 18, through the interlocking pin 17, to cover the photomultiplier. The external source 24 used in determining counting efficiency may be moved into position down a bore in the plug 22, the source being carried in a tube 23 closed at is upper end 25. The source may be barium - 133, caesium - 137, cerium - 133, radium - 224 or strontium - 85.
Patent GB-427235-A (GB)
Title: Change speed mechanism
IPC: F16H33/16
Filed: 1934-06-28
Abstract: 427,235. Variable - speed gearing. MATTIA, P., 12, Via Passerella, Milan, Italy. June 28, 1934, No. 19081. [Class 80 (ii)] A variable-speed gear comprises a power shaft 1, a secondary shaft 9, and a driven shaft 19. Both shafts 1, 9 carry a carrier 2 having axles 3 on which are fixed gears 4, 5, and a reservoir 6. The latter holds a quantity of high density fluid, e.g. mercury, and has inclined vanes a, Fig. 4, or a radial web. Each gear 5 engages a member 11 which is connected to the stationary casing p by a one-way brake 13, 14, so that the member 11 can rotate only in one direction. Each gear 4 on the carrier 2 of the shaft 1 engages a wheel 8 fixed to the shaft 9, and the corresponding wheels 4 of the shaft 9 engage a wheel 8 secured to the driven shaft 19. When fitted to a motor car the mechanism gives a high starting torque, and at high speeds the action of the fluid in the reservoirs 6 on the vanes a assists in obtaining a solid drive from the shaft 1 to the shaft 19.
Patent GB-256392-A (GB)
Title: Reversing gear for fordson tractors and the like
IPC: F16H3/00
Filed: 1925-07-27
Abstract: 256,392. Malherbe, E. July 27, 1925. Reversing - gearing. - An independent reversing- gear is provided between the engine and the change speed gear of a Fordson tractor which may be used on rails so that the same changes of speed may be obtained in both directions, this reversing gear being controlled by the steering hand-wheel which is not required for steering purposes. The engine shaft 1 carries a sliding gear wheel 3 having clutch teeth 13 by which it can be directly coupled to a gear wheel 16 of the usual changespeed gear. This gear wheel is in mesh permanently with a wheel 18 on a shaft 11 coaxial with the worm shaft driving the rear axle (not shown). The gear wheel 3 can slide to engage an idler wheel 7 meshing with a wheel 9 on a shaft 10 coupled to the shaft 11 and can thus drive the gear wheel 16 in the opposite direction to the drive transmitted through the clutch teeth 13. The reversing gear is enclosed in an oilcontaining casing 2 separate from the main gear casing. The sliding gear wheel 3 is controlled by a fork fixed on a sliding rod held in any one of three positions by a spring catch and operated by the steering hand-wheel the steering gear being discarded.