baber/WOPTO huggingface dataset:
Patent GB-186020-A (GB)
Title: Improved method of and apparatus for producing a solution of cyanamide from calcium cyanamide
IPC: C01C3/16
Filed: 1922-05-17
Abstract: 186,020. Wargons Aktiebolag, and Lidholm, J. H. Dec. 1, 1921, [Convention date]. Cyanamide.-In the production of solutions of free cyanamide by gradually adding calcium cyanamide to a circulating body of water or cyanamide solution into which carbon dioxide is admitted, the process is carried out in such a way that the quantity of liquid between the points where the calcium cyanamide and carbon dioxide respectively are supplied is constant and small compared with the total quantity of liquid notwithstanding the increase in bulk owing to the addition of the calcium cyanamide. The result is that each addition of calcium cyanamide is only a short time in the liquid before reaching the carbonic acid, and only a small proportion of the liquid is alkaline. Calcium oyanamide is fed from a hopper 2 by a valve 3 into a small tank 1, from which the liquor passes tod a pumping-device 5 containing a centrifugal wing wheel 11 and mixing-vanes 12. Carbonic acid is supplied by a pump 13 and is mixed with the liquid in the apparatus 5. The liquor then passes through a pipe 6 to a cooler 7 if necessary and thence by a pipe 8 to a large tank 9 which is capable of accommodating the increase in the bulk of the circulating liquor. From the tank 9 the liquor is passed by a valve 15 and pipe 10 to the tank 1. The pipe 8 is preferably tangential to the tank 9 so as to facilitate the escape of gas which is led off by a pipe 14. The finished solution is withdrawn at 16
Patent GB-928599-A (GB)
Title: Electromagnetic clutches
IPC: F16D27/09
Filed: 1960-04-21
Abstract: 928,599. Ball-bearings. BENDIX CORPORATION. April 21, 1960 [April 30, 1959], No. 14033/60. Addition to 866,588. Class 12 (1). [Also in Groups XXIV and XXXVI] In place of the usual brushes and slip-rings in a friction (Fig. 4, not shown), or positive electromagnetic clutch 10, 17 for machine tools, means conducting current to and from a rotating winding 13 comprises a pair of electrically conducting ball-bearings 42, 52 concentric and electrically-insulated from each other, the innermost and outermost races 40 and 51 being secured in an insulating housing 22 rotatable with the winding 13 and connected each to one end of the winding via leads 62, 63 respectively and the two intermediate races 41, 50 being stationary and connected to stationary leads 60, 61 respectively, and axial thrust is continuously applied to one race of each bearing with respect to its complementary race to maintain said races in electrical contact with the balls associated therewith. The above current conducting means may be produced as an attachment for the body of an existing electromagnetic clutch. As shown, the positive clutch comprises a clutch body 10 which incorporates a winding 13, is keyed to a driving shaft 11, and has axially projecting clutch teeth 15 to engage complementary teeth 16 on an armature 17 attached to a driven gear 18. The housing 22 and an outer ring portion 25 thereof are together secured by screws 23 directly to the body 10 or, as shown, for attaching to an existing clutch, to an adaptor ring 20 shrunk on the body. The two intermediate races 41, 50 are mounted on a T-sectioned ring 33 screwed at 34 to a plate 30 which is held against rotation by a fixed peg 38 engaging a slot 37 in a forked projection 31 of the plate which projection serves to guide the leads 60, 61. The housing 22, rings 25, 33 and plate 30 are of non-conducting material such as moulded phenolic resin. Cutouts 64, 65 in the body 10 and the ring 33 may be provided for the leads 62, 63 and 60, 61 respectively and may be filled in with suitable insulating adhesive such as epoxy resin. A small clearance 67 existing when the races 51, 50, 41 and 40 are in untightened abutment with a flange 55 of the outer ring 25, a flange 36 of the ring 33, the plate 30 and a shoulder 45 of the housing 22 respectively is substantially taken up by tightening the screws 23 so as to stress the parts and impart a continuous axial thrust which is transferred between the flange 55 and the shoulder 45 through the bearing 52, the ring 33, the plate 30 and the bearing 42. The friction clutch (Fig. 4, not shown), may be of the single or multi-disc type. Specification 847,567 is referred to.
Patent GB-181339-A (GB)
Title: Apparatus for underground animal extermination
IPC: A01M17/00
Filed: 1922-05-18
Abstract: 181,339. Meter, J. W. van. June 9, 1921, [Convention date]. Vapours, producing by chemical action; vapours, delivering. - Underground animals are killed by injecting into their burrows poisonous fumes generated bv the action of a gas, such as chlorine, on chemicals within a cartridge through which it is passed. The apparatus used comprises an outer tube 1 which is inserted into the mouth of the burrow 18 and is fitted with an inner tube 2 supported by spacing blocks 3 so as to leave an annular space B which is open at each end. A paper cartridge 4 loosely fitting the inner tube 2 is held in a tapered recess 31 in a tubular holder 9 which is connected by a flexible tube 8 to a portable chlorine cylinder. The cart. ridge is closed at each end bv centrally perforated wads 10 and by thin paper discs 12 adapted to be ruptured at the time the cartridge is used. The ends of the cartridge contain porous plugs 14 of combustible material such as excelsior and the central portion contains moist sawdust 16 mixed with metallic particles and impregnated with creosote. On the passage of chlorine violent chemical action is set up and large volumes of poisonous gases and smoke pass into the burrow and induce alsr, a flow of air through the annular space B. At the end of the operation a sideways movement of the holdar 9 releases the spent cartridge which falls through the inner and outer 'tubes into the burrow. Flags 28 secured to tubes 1 previously placed in position direct a second operator carrying the cartridges and chlorine cylinder. Specifications 168,888 and 178,409 are referred to.
Patent GB-800750-A (GB)
Title: Improvements in or relating to emulsions for making moisture impermeable paper and the like
IPC: D21H17/60
Filed: 1956-05-07
Abstract: Emulsions suitable for the water-vapour proofiing of paper and paperboard comprise water, microcrystalline wax, a solid polymer selected from polyisobutene or copolymers thereof, such as butyl rubber and/or polyethylene, with kaolin or ball clay as an emulsifying agent, promoted by a cationic surface-active agent. The emulsions are oil-in-water type and the weight of the polymer is 5 to 45 per cent of the combined polymer and wax which is present to the extent of 3 to 10 parts per part of clay.  Solid polyisobutene of a M.W. of 30,000 to 150,000 alone or copolymerized with 2.5 per cent polyisoprene, and polyethylene of MW 7000 to 25,000 may be used. Cationic surface-active agents are listed and a mixture of hexadecyl, octadecyl, and octadecenyl amines is preferred.  The emulsion is prepared by forming a master batch of polymer and wax by mixing at 250-300 DEG  F.  More wax is added at intervals while keeping the blend homogenous and alkyl amine is added during blending at 195 DEG to 200 DEG  F.  The mixing is stopped while the clay slip is added and further mixing at 180 DEG  F. inverts the blend to an oil in water emulsion.  A portion of water at 210 DEG  F. is added gradually, and the remainder at room temperature together with lignin sulphonate solution.  The resulting emulsion is filtered and may be stored in polyethylene lined drums, or supplied directly to a paper-coating machine.
Patent GB-946859-A (GB)
Title: Improvements in or relating to bonding processes and bonded assemblies produced therewith
Inventor: MCMILLAN PETER WILLIAM
IPC: C04B37/00
Filed: 1959-04-24
Abstract: Two components, e.g. of ceramic, metal or both, are bonded together by means of an interfacial layer of devitrified sealing glass containing a nucleating agent such as phosphate ions, metallic fluorides, or metals.  Preferred glasses are of LiO2 and SiO2 to which either Al2O3, MgO or both may be added, several examples being given.  The preferred nucleating agent comprises phosphate anions resulting from the inclusion in the glass of P2O5, but other agents mentioned are metallic fluorides, cadmium sulphoselenide, gold, silver and copper. Metal parts are sandblasted, degreased, and pre-oxidized, first being plated, if necessary, with e.g. chromium or other metal which will readily pre-oxidize.  The glass is preferably applied in suspension to both surfaces to be bonded, these then being brought together and subjected to a heating and cooling cycle which will bond them and result in controlled devitrification of the glass layer.  Sealing glass compositions and heat cycles for sealing a Ni-Fe-Co alloy to a zircon-enstatite ceramic and a high alumina ceramic, and for sealing a Ni-Fe alloy to a forsterite ceramic are given, the alloy being chromium plated and fired in "wet" hydrogen to form a chrome-oxide layer. Heating may be carried out by gas flame or high-frequency electricity in a reducing atmosphere. Specifications 924,996, 930,931 and 943,599 are referred to.
Patent GB-1530767-A (GB)
Title: Process for the preparation of alkylthiomethylphenols
IPC: C07C/
Filed: 1977-04-04
Abstract: 1530767 Alkylthiomethylphenols BAYER AG 4 April 1977 [6 April 1976] 14108/77 Heading C2C Alkylthiomethylphenols of the general formula in which R<SP>1</SP> represents optionally substituted alkyl with 1-12 carbon atoms or represents optionally substituted phenyl, R<SP>2</SP> and R<SP>3</SP> which may be identical or different, each represent hydrogen, alkyl with 1-5 carbon atoms, halogen or nitro, or R<SP>2</SP> and R<SP>3</SP> conjointly represent a benzene ring or cycloalkane ring with 3-5 carbon atoms which is fused to the phenyl ring and n represents 1, 2 or 3, are obtained by reacting a dialkylaminomethylphenol of the general formula in which R<SP>2</SP>, R<SP>3</SP> and n have the above-mentioned meanings and R<SP>4</SP> and R<SP>5</SP>, which may be identical or different, each represent alkyl with 1-6 carbon atoms, or R<SP>4</SP> and R<SP>3</SP>, conjointly with the adjacent N atom, form a five-membered or six-membered heterocyclic structure, with a thiocarboxylic acid S-ester of the general R<SP>6</SP>COSR<SP>1</SP> in which R<SP>6</SP> represents H or (C 1-4 ) alkyl. The reaction may be carried out at 70 to 170 C. in the absence of a catalyst or in the presence of 0À1 to 40% by wt. of phenol as catalyst. The products are useful as intermediates in the preparation of plant protection agents.
Patent GB-777776-A (GB)
Title: Improvements relating to the production of metal sheet
Inventor: TINLEY ERNEST LAMBERT
IPC: B21D1/05
Filed: 1954-05-14
Abstract: 777,776. Straightening; altering physical structure. BIGWOOD & SON, Ltd., J. May 10, 1955 [May 14, 1954], No. 14132/54. Class 83 (4). In or for a roller levelling machine means for imparting a sharp bend to the sheet 21 being treated comprises a pair of opposed bending rolls 14, each pair of ends of which is mounted in a common carrier 13, the two carriers being mounted inside frames 10 of the machine for rotation about a horizontal axis, said means being characterized in that each bending roll 14 is supported, at its side remote from the other bending roll 14, by a pair of spaced parallel support rolls 22 carried in a member 23 which is adjustable towards and away from the bending roll, along a direction which is inclined to the vertical. The adjustment of the member 23 is effected by fiuid pressure means 24. In operation, the sheet 21 is passed through guide rolls 11, the bending rolls 14 and pinch rolls 12. The carriers 13 are then angularly adjusted by gears 16 to move the rolls 14 to the position shown in Fig. 3. Sheet 15 then fed through is deflected by the rolls 14 to cold work it and prevent stretcher strains therein, passing from the rolls 12 to the roller levelling machine.
Patent GB-696750-A (GB)
Title: Improved control system of the electric retro-active type
IPC: H03J7/22
Filed: 1952-06-05
Abstract: 696,750. Automatic control systems. SPERRY CORPORATION. June 5, 1952 [June 5, 1951], No. 14222/52. Class 38 (iv). In a control system of the retro-active or feedback type, the controlled element is swept through a range of values, to ensure initial locking-in, by an oscillator which feeds its output voltage across the output leads of an amplifier in the feed-back path. After locking- in the oscillator is ineffective, as the amplifier then has low output impedance owing to the negative feed-back. The system is shown in the diagram applied to the frequency control of a microwave oscillator 14 of the reflex klystron type, which feeds a cavity-resonator discriminator 20 through a coaxial line 15 and waveguides 16, 18. Frequency error detected by the discriminator is fed as a positive or negative voltage to a D.C. amplifier 22, the output of which is passed through a cathode follower stage 24 to the repeller electrode of the klystron 14 to adjust its frequency. The invention consists in providing a sweep oscillator 30 shown as of the phase-shift type, which feeds its output voltage across the output leads of the amplifier 22 to give a comparatively wide sweep to the frequency of the klystron at a low periodicity, e.g. 100 cycles per second. Prior to locking-in, owing to the absence of feed-back round the loop 22, 24, 14, 20, the oscillator is feeding into a high impedance and provides a sufficient voltage output. As soon as the klystron locks in, negative feed-back round the loop so reduces the output impedance of the amplifier 22 that the oscillator provides only a reduced or ineffective sweep voltage.
Patent GB-541500-A (GB)
Title: Improvements in or relating to gas meters
IPC: G01F15/00
Filed: 1940-09-16
Abstract: 541,500. Gas meters. ROBINSON & CO. (LIVERPOOL), Ltd., J. H., ORMEROD, G. A., and ROBINSON, D. M. Sept. 16, 1940, No. 14238. [Class 54] A capillary duct such as a hole or slit 18 is provided at one or both ends of the valve grids or seating of a dry gas meter to supply oil from an oil bath to lubricate the surface 12 over which the valve 14 slides. A filter pad 20 is located at the base of the duct. A pad may also be provided at the top of the duct. Specifications 167,710, 199,077, [both in Class 54], and 355,969 are referred to.
Patent GB-1028220-A (GB)
Title: Improvements in or relating to the extrusion of metals
IPC: B21C23/01
Filed: 1964-04-07
Abstract: 1,028,220. Extruding; shearing; making billets. J. H. CAIRNS, and YORKSHIRE IMPERIAL METALS Ltd. April 7, 1964, No. 14263/64. Addition to 1,025,643. Headings B3A, B3P and B3W. In the preparation of billets for hot extrusion according to the parent Specification the leading end of the billet 1 is scalped before or after scalping of the peripheral surface. The billet is held on a support 2 by a mechanical or hydraulic clamp 3 and its end 6 is scalped by a shear blade 4.
Patent GB-176275-A (GB)
Title: An improvement in the construction of walling of buildings
IPC: E04B2/56
Filed: 1921-05-23
Abstract: 176,275. McLean, D. May 23, 1921. Walls. - In the wall described in Specification 153,758 and formed of blocks or slabs comprising concrete - faced wooden frames bolted together and the whole concreted over, precast independent concrete ribs or stanchions 3 with dovetailed sides are inserted in the horizontal or vertical joints and are united to the concrete covering by strips 9 of expanded metal cast in the ribs. The ribs or stanchions may be made in short lengths butted together. Felt packing strips 7, 8 are placed between the blocks and ribs, and the spaces adjacent to the dovetailed sides are grouted. The stanchions and woodwork may be perforated for air circulation.
Patent GB-769326-A (GB)
Title: A method of manufacturing rods of glass fibre reinforced plastic
IPC: A01K87/00
Filed: 1954-05-14
Abstract: Fishing rods for spinning are made of glass fibre reinforced plastic material.  The manufacture (see Group V) comprises passing small bundles of glass fibres through liquid resin, drawing them through a heated tube when the resin is cured and cutting the resulting rod into lengths.
Patent GB-945328-A (GB)
Title: Servo operated fluid flow control valve
Inventor: KEMPSON BERTRAM CARL
IPC: F16H39/02
Filed: 1961-04-20
Abstract: 945,328. Fluid-pressure servomotor control systems. DOWTY HYDRAULIC UNITS Ltd. April 19, 1962 [ April 20, 1961], No. 14333/61. Heading G3P. A servo-operated valve for controlling the relief of pressure between two conduits, irrespective of which is the high pressure conduit, comprises a valve member 7 having a closure surface 11 co-operating with a seat 9. The valve member is formed on a stepped piston slidable in bores 8, 12 the cross-sectional area of the bore 8 being preferably twice that of the bore 12. Pressure chambers 14, 16 are provided on either side of the seat whereby the fluid pressure in these chambers acts on two surfaces of the valve member in the opening direction. Passages 19, 23, having restriction 21, 24 lead from the chambers past non-return valves 22, 25 to a control pressure chamber 18 which may be vented by a control valve 29. Passages 41, 43 also lead from the pressure chambers to chambers 39, 42 whereby fluid pressure acts on pistons 38, 37 to open the control valve 29. The valve is shown controlling the relief of pressure between conduits 2, 3 of an hydraulic transmission. Assuming that the conduit 3 is the high pressure conduit, fluid in chamber 14 passes through the passage 19 and valve 22 to the control chamber 18 and acts to hold valve 25 closed. This fluid pressure also acts in chamber 39 on piston 38. When the pressure reaches a predetermined value, the valve 29 is opened to vent chamber 18 and the pressure in chamber 14 opens the valve 7 to relieve pressure in the conduit 3. If conduit 2 is the high pressure conduit, the valve is opened in a similar manner by the pressure acting on piston 37.
Patent GB-396193-A (GB)
Title: Improvements in and relating to lifting trucks
IPC: B62B3/06
Filed: 1932-05-20
Abstract: 396,193. Hand-trucks. BARSON, J., 10B, Russell Street, Sydenham, London. May 20, 1932, No. 14385. [Class 108 (i).] In hand-trucks with elevating load platforms the steering and draught tongue is pivoted to and between a pair of bell-crank levers which are pivoted to the main frame whereby two fulcrums are in effect provided for the tongue to give a varying leverage in lifting the load platform. The tongue 5 is provided at its lower end with an off-set portion 6 pivoted at 7 to and between a pair of bell-crank levers 8, the other ends of which are pivoted at 9 to the main frame. Pivoted to the tongue at 11 are a pair of links 12 connected at 13 to the load platform brackets 15 so that the initial part of the lifting is performed about pivots 7 and the latter part about pivots 9, the offset portion 6 and the bell-crank levers 8 being locked together by means of a pin 29. Pivoted. to brackets 19 on the main frame are hooked locking levers 17 adapted to engage the pin 13 when the load platform is elevated. To unlock the levers, the tongue is depressed and a collar 22 is drawn by means of handle 24 into the path of a trip means 21 on the levers 17 to depress the levers 17 and allow the platform to descend under the eontrol of the tongue 5.
Patent GB-514739-A (GB)
Title: Improvements in and relating to internal combustion engines and to methods of cooling parts of the same
IPC: F02C5/12
Filed: 1938-05-13
Abstract: 514,739. Gas turbines. HOLZWARTH, H. May 13, 1938, No. 14395. [Class 110 (iii)] Parts of an internal-combustion engine are cooled by separate cooling fluids at different temperatures, so that the parts where the higher velocities of the working fluid obtain are cooled by the .cooler fluid. The forward portions of the nozzle walls 2 are cooled by cold water which is passed through the bores 9, 10 in such quantity that steam is not generated. The rearward portions and the valve chamber are cooled by hot water in the chamber 19 and passing through bores 16 in the nozzle walls and steam under pressure is generated in the process. The cold water is introduced to and evacuated from side chambers 11 by way of pipes 13.
Patent GB-383954-A (GB)
Title: Improvements in radio tuning control
IPC: H03J1/10
Filed: 1931-05-15
Abstract: 383,954. Condensers. TICHENOR, C. M., 4549, 40th Street, Long Island City, New York, U.S.A. May 15, 1931, No. 14435. Convention date, June 18, 1930. [Class 38 (ii).] The Specification as open to inspection under Sect. 91 describes an auxiliary condenser D mounted between screening compartments S<1>, S<2>, and comprising a longitudinally movable conductive member 82 and a stationary sleeve 85, these parts being separated by an insulating sleeve member 83. The movable part 82 of the condenser is connected to the auxiliary adjustment shaft by a rod 81. This subjectmatter does not appear in the Specification as accepted.
Patent GB-165640-A (GB)
Title: A new or improved device for filtering and purifying water and other liquids
IPC: B01D35/04
Filed: 1920-05-27
Abstract: 165,640. Langton, E. A. May 27, 1920. Jet nozzles; nozzles with grooved orifices; strainers, arrangement of.-A device for filtering and purifying water &c. comprises a tap a for attachment to the source of supply connected by a diminishing box f to a cylindrical body g containing small pieces of aluminium tubing l through or around which the water flows. Additional pieces are placed at l<1>. The liquid then passes into a gun-metal container i fitted with aluminium bars m and copper-gauze bed o, and flows out through an internally grooved tube and funnelshaped nozzle k. The bars m have their upper edges m<1> Fig. 4, bevelled so as to form grooves along which the water passes to slots n, Fig. 5.
Patent GB-1393151-A (GB)
Title: Add lens projection system with balanced performance
IPC: G02B15/02
Filed: 1972-03-28
Abstract: 1393151 Copying lens XEROX CORP 28 March 1972 [1 April 1971] 14504/72 Heading G2J A lens system for a copying machine, in which it is disposed along an optical path between fixed object and image planes, provides multiple magnifications; it comprises a movable basic lens combination 1 capable of being positioned at at least three selected locations along the optical path, a first of the locations, Fig. 1, part A corresponding to the "principal" position of the basic lens combination in which it is most corrected, the magnification being different from 1:1 at the "principal" position, and the second and third of the three locations, Fig. 1, parts B and C representing "balanced" positions on either side of the "principal" position in which the lens system performs substantially the same as regards depth of focus, resolution, and degree of aberration; the magnification is 1:1 at the second position; "add" lenses 15, 25 can be moved into and out of the optical path for selective combination with the basic lens combination 1 at the second and third locations as shown, or, alternatively, the basic combination may already include an "add" lens, which may be moved out of the optical path at the second location, a different "add" lens being moved into the optical path at the third location Fig. 2 (not shown). The basic lens combination of Fig. 1 may be a non-symmetrical split dagor lens; an alternative basic combination is a non-symmetrical helian plus singlet lens Fig. 2 (not shown), the singlet being an "add" lens. Optical data are given for these  two examples. The invention may be applied for systems requiring two or more magnifications, further "add" lens locations flanking the "principal" position being created as necessary; for an even number of magnifications the "principal" position is not used. Specification 1223427, which discloses apparatus for mounting the lenses, is referred to.