baber/WOPTO huggingface dataset:
Patent GB-607014-A (GB)
Title: Improvements in and relating to cathode ray tube time-base circuits
IPC: H03K4/20
Filed: 1946-02-19
Abstract: 607,014. Saw-tooth generating circuits. HINCKLEY, G. L., and SIMMONS, J. H. W. Feb. 19, 1946, No. 5147. [Classes 40 (vi) and 40 (vii)] In a time-base generator, means are provided for accelerating a short initial portion of the time-base so that the working portion is displaced along the time axis, a switch rendering the accelerating means operable or inoperable at the start of the next succeeding trace. A positive synchronizing pulse, applied to the grid of transitron-connected valve V10 causes it to generate a positive-going square wave in the anode circuit which is applied to the suppressor grid of valve V12. Current-flows in the anode circuit of valve V12, the capacitor C39 causing the anode potential to fall linearly to generate a saw-tooth wave which is fed over coupling capacitor C38 to one of the deflecting plates of a cathode-ray tube. The grid resistors R55, R101 are returned to the anode of valve V15 which is normally conducting so that the anode potential has an intermediate value. When signals are being received from one aerial, switch S is closed to maintain the grid of valve V15 at earth potential, but upon the aerial switch reversing, switch S1 opens. The positive-going square wave from the anode of valve V10 is also fed to the grid of valve V14 to develop a negative-going square wave at the anode, which is differentiated over capacitor C43 and resistor R67 so that the valve V15 is cut off for a few microseconds at the commencement of the time-base. The resulting rise in anode potential of valve V15 causes the current through resistors R55, R101 to rise sharply and the anode potential of valve V12 to fall rapidly. When valve V15 conducts again at the end of the short pulse, the anode potential is restored and thus the rate of fall of anode potential of valve V12. Valve V13 is arranged to provide a phase-reversed output for the opposite deflector plate and valve V14 supplies a black-out square wave to the cathode of the cathode-ray tube. The relative displacement of the two time-base traces may be adjusted by variable resistor R67, the shift being removed when not required, by closing switch S2. The negative-going wave from the screen of valve V10 may feed a calibrating circuit.
Patent GB-384485-A (GB)
Title: Improvements in or relating to sound reproducing devices of the electro-dynamic or mo
IPC: H04R9/06
Filed: 1932-02-20
Abstract: 384,485. Loud - speakers. MURKHAM, L. W. and BENNETT, D. T., 73, Gower Street, London. Feb. 20, 1932, Nos. 5150 and 7987. [Class 40 (iv).] A composite diaphragm for a moving coil loud-speaker or microphone comprises two elements, one of which is formed from sheet metal as a flanged dome and has the moving coil attached thereto so that the coil extends coaxially thereof at the junction of the dome with the flange, whilst the other is of conical formation and is coaxially attached, as by adhesive, at its smaller periphery to the convex surface of the dome. Fig. 1 shows a construction of loud-speaker in which the smaller end of a conical element 15 is secured to the central domed portion 17 of the smaller diaphragm element carrying the coil 21 and surrounded by the wide flange 18 formed with concentric corrugations 19. The diaphragm is carried by a conical support 14 formed at its larger end with an angle section flange 25 on which a flexible surround 16 secured to the non-flanged periphery of the cone 15 is clamped by a member 27 lined with felt 28. The smaller end of support 14 is formed with an apertured inturned flange 24 between which and washers 30 the flange 18 is secured to the magnet 11 by screws 32. The apertures in the flanges 18, 24 and in the washers 30 are enlarged so as to permit of accurate centring of the coil in the air gap 12. The leads from the coil are led upwardly over the former 22, passed spirally around the flange 18 and finally led through gaps in one or more of the washers 30 to terminals on the support 14. Fig. 2 shows a similar construction to that shown in Fig. 1, but in this case the central domed portion 44 of the smaller diaphragm is provided with a plain flange 45 which is mounted on a separate surround 47 of flexible thin sheet material, such as celluloid, the outer margin of which is mounted on the magnet 41 in a similar manner to the flange 18, Fig. 1. The proportions and materials of the flange 45 and surround 47 are so arranged that, during axial movement of the smaller diaphragm element, flexure will take place mainly at or in the neighbourhood of the junction of the flange 45 with the domed portion 44. If desired, the flange may also be formed with radial slits. According to the arrangement shown in Fig. 2, the coil 46 and its former will not overreach the end of the air gap during normal use and, in order to obviate the collection of dust &c. in the gap, a layer of cottonwool 51 is retained across the lower end thereof by means of a strap 52. A similar construction of moving coil microphone is also described, Fig. 3 (not shown), but in this case a somewhat smaller magnet and a considerably smaller conical diaphragm element are employed. The larger periphery of the conical element is turned over to provide a flange, the element being supported solely by its attachment to the domed element, and the instrument is enclosed in a suitable casing.
Patent GB-120842-A (GB)
Title: Improvements in or relating to the Commutator Brushes of Electric Motors.
IPC: H01R39/38
Filed: 1918-03-23
Abstract: 120,842. Sykes Interlocking Signal Co., W. R., and Tarrant, R. W. March 23, 1918. Brushes; brush-holders.-In brush-holders of the type in which two brushes are pressed against diametrically opposite points of the commutator by levers drawn together by a spring, the levers are insulated from the brushes, which slide in guides connected to the terminals. The brushes 12, which are built up of alternate layers of wire-gauze and graphite are of rectangular cross-section and slide in corresponding guides 13, which are carried by, but insulated from, brackets 26 attached to the casing of the machine. The guides are connected by screws 27 to plates 28 carrying terminals 29. The brushes may be connected directly to the terminals 29 by light conductors. The brushes are pressed against the commutator 11 by levers 19 insulated from the brushes by rollers 20 and drawn together by a spring 21.
Patent GB-154494-A (GB)
Title: Improvements connected with counter balanced cranks for velocipedes
IPC: B62M3/00
Filed: 1920-02-20
Abstract: 154,494. Bailey, A. Feb. 20, 1920. Cranks.-A weight or counterbalance is attached to each crank of a velocipede, with one face flush with the outside face of the crank, to assist in effecting the rotation. In the form shown, the weight c is fixed out of centre on a screwed stem d, which is adjustably secured to the crank a by a clamp e and saddle f bearing on the end of the crank.
Patent GB-550891-A (GB)
Title: Improvements in and relating to flexible hose couplings
IPC: F16L33/207
Filed: 1941-04-22
Abstract: 550,891. Pipe joints. MELSOM W. A.. and BOWDEN (ENGINEERS) Ltd. April 22, 1941, No. 5208. [Class 99 (i)] In a hose-pipe coupling having a reinforced hose 1, 2 secured between a sleeve 6 and an insert 8, the metal and/or fabric reinforcement 4 is laid.bare at the end of the hose and clamped between separate parts 5, 7 of the sleeve and insert so that it is held by a shoulder 10 against axial movement. The hose pipe comprises an inner layer 2 of rubber or the like and may also have an outer layer 1 of rubber, or of incompressible material which flows under the contracting pressures, or of fabric. In a modification the bared reinforcing-layer 4 is compressed into a recess or groove in the insert 8, and a separate ring is contracted on the insert at the end of the sleeve 6. The projecting end of the reinforcement 4 may be surrounded by a metallic split ring, ferrule, or spring before the sleeve 6 is compressed thereon. Specifications 540,489, 540,490, 540,491, and 540,492 are referred to.
Patent GB-154495-A (GB)
Title: Improvements in screw propellers
IPC: B63H1/24
Filed: 1920-02-21
Abstract: 154,495. Bergius, W. Feb. 21, 1920. Screw propellers with folding blades are maintained in their operative position by an axiallysliding pin which engages in notches in the roots of the blades. The blades 2 are pivoted on a bolt 3 passing through the boss 1. Each blade is formed with a notch 6 which is engaged by a transverse pin 5 which may be moved axially. A cover 9 is movable axially on the boss 1 and is perforated at 10 to receive the ends of the pin 5. The cover is moved bv a sleeve 11 which is manually operated, and the pin 5 is normally pressed into engagement with the notches 6 by a spring 7. The propeller is intended for use with ships provided with auxiliary engines for running astern, and the blades open out into their operative positions by centrifugal force.
Patent GB-839682-A (GB)
Title: Improvements in or relating to green-crop mowers
IPC: A01D34/535
Filed: 1959-02-16
Abstract: 839,682. Forage harvesters. LARSEN, H., [trading as MASKINFABRIKEN TAARUP.]. Feb. 16, 1959 [Feb. 21, 1958], No. 5300/59. Class 6(3). The flails 7 of a forage harvester are pivoted to an intermediate member 4 which is itself pivoted to a rotary drum, the two pivots 10, 3 being mutually perpendicular and the arrangement being such that the flail and intermediate member normally act as a single member. Each flail 7 is clamped between the limbs 6 of the bifurcated intermediate member 4 which is mounted on the pivot 3 by a bearing 5 which may be of nylon. The pivot 3 is carried by a bracket 2 welded to the drum. The clamping means comprises a nut 12 and bolt 11 which permit lateral deflection of the flail under heavy load.
Patent GB-112132-A (GB)
Title: Improvements in or relating to the Cylinders of Internal-combustion Engines.
Inventor: GUY SYDNEY SLATER
IPC: F02F1/10
Filed: 1916-04-12
Abstract: 112,132. Cash, J. Feb. 3, 1917. Chucks.-Relates to bevel-closing sliding-jaw chucks and consists in means for locking the jaws. In the chuck shown, which is of the type claimed in Specification 102,567, each jaw b has an abutment c, Fig. 2, which is moved inwards by the axial movement of a ring d having a bevelled groove d<2>, Fig. 7, for each abutment. The outer surface of the ring d is grooved to receive a ring e, made in halves and moved endways by a stirrup n, Fig. 2, and lever, the bess k<1> of which is mounted in the cover l. The ring d and the jaws are locked by plungers f, Fig. 4, engaging racks h secured to the body of the chuck. When the ring c is moved to open the chuck, it carries with it a number of slides i which have at one end lugs engaging a groove e<1> in the ring c and at the other inclined lugs i<2> to engage the heads of the plungers f and raise them against the action of the springs g and thus unlock the ring d which is moved to free the jaws by further movement of the ring e.
Patent GB-455434-A (GB)
Title: An improved method of making alloys
IPC: C22C1/02
Filed: 1935-02-20
Abstract: In making alloys containing iron or nickel or both, by melting, one or more of the ingredients which is or are liable to oxidize or volatilize or otherwise to be impaired in the melt is or are mixed with two or more substances, one of which is a metallic salt and another or the other ethyl or methyl alcohol or a mixture thereof. Manganese-iron alloys may be made by the use of potassium sulphate and methylated spirit, aluminium-nickel alloys by the use of potassium aluminium sulphate or potassium iron sulphate and methylated spirit, copper-nickel alloys, with or without iron, by the use of calcium nitrate and methylated spirit; in the latter case, the calcium nitrate may be replaced by a mixture of lime and sodium or potassium nitrate.
Patent GB-344636-A (GB)
Title: Improvements in non-drip valves and the like
IPC: F16K23/00
Filed: 1930-02-18
Abstract: 344,636. Fluid actuated valves; accessories. S.I.A.M., Ltd. and ABRAM, W. H., 46, Kingsway, London. Feb. 18, 1930, No. 5440. [Class 135.] A non-drip valve for the discharge nozzles of lubricating oil pumps comprises a central stationary member 2, formed at the lower end with a conical valve face, and a sliding cylindrical sleeve 10 provided with an inwardly-disposed conical seating 7, said sleeve enclosing the member 2 and being integrally formed with or attached to the free end of a resilient bellows device 8, the whole being enclosed within the nozzle extension 1. In use the pressure of the oil &c. within the nozzle extends the bellows 8 thereby pushing the seating 7 away from the stationary valve face and allowing the oil to escape. The inwardly-tapered valve seating 7 when extended guides the oil &c. in a straight stream as it issues from the nozzle. The stationary member 2 is provided with channels 6 forming oil passages. A spring 11 arranged between the free end of the bellows and a flange 12 on the nozzle assists the return movement of the bellows. A one-way valve 15 arranged behind the non-drip valve closes the nozzle automatically on the return stroke of the pump. A corrugated diaphragm may be substituted for the bellows.
Patent GB-1211491-A (GB)
Title: Spacing members for maintaining plates at a predetermined distance from one another
IPC: H01H43/02
Filed: 1969-01-31
Abstract: 1,211,491. Switch cases. SIEMENS A.G. 31 Jan., 1969 [31 Jan., 1968], No. 5443/69. Heading H1N. A strut for holding two parallel plates, such as the end plates of a programme control switch (Figs. 4 and 5, not shown), at a predetermined spacing, and comprising a flat strip 1 having projections 7 at each end for passing through slots in the respective plates, is provided with abutment edges 4 at a substantial angle to the plane of the plate in order to prevent relative tilting of the strip and plate. L-shaped incisions 9, 10 are made in the plate 1 on each side of the projections 7 and the lateral edges 2 of the plate are bent about axes 11 such that the abutments 4 extend on both sides of the plane of the plate. The projections 7 have incisions 12, terminating in holes 13 and being slightly inclined, such that twisting the projections 7 clamps the plates (5, Figs. 4, 5 and 6, not shown) firmly against the abutments 4. At least one opening 14 is provided in the strip 1 to receive lugs (16, Fig. 6, not shown) of an intermediate plate (15).
Patent GB-124587-A (GB)
Title: Improvements in or relating to Mechanically Cast Type-bars.
Inventor: WALKER ARTHUR HENRY
IPC: B41B1/02
Filed: 1918-03-28
Abstract: 124,587. Walker, A. H., and Holbourns, J. G. March 28, 1918. Type-bars.-Type-bars are cast with means by which adjacent pairs may be locked together. Fig. 3 shows a pair of interlocked shallow typebars 1, 2 more particularly for printing a person's. name and address in two lines. The bar 1 is cast with a dovetail or other recess 3 adapted to receive a corresponding projection 4 cast on the bar 2. The projection 4 may extend approximately the full length of the bar or a short projection may be cast at each end of the bar 2 to engage short recesses in the bar 1.
Patent GB-592599-A (GB)
Title: Improvements relating to cutting tools
IPC: B24B3/08
Filed: 1945-03-07
Abstract: 592,599. Grinding tapered tools. BATEMAN, W. H. (Motor Tool Manufacturing Co.). March 7, 1945, No. 5697. [Class 60] A dummy for use in combination with or in place of a rotary form cutter has the surface of its head the duplicate of the rotary envelope of the head of the corresponding rotary form cutter. Both dummy and tool, which may be tapered, have witness marks from which points of definite diameter may be determined. The rotary form cutter 10 having a tapered spirallytoothed cutting head 12 and a shank 15 is mounted between centres 22 and 23. The corresponding dummy 11 has a tapered head 17 of a form identical with the envelope of the teeth of the cutter and is mounted between longitudinally adjustable centres 24 and 25. Similar witness marks on the work and the dummy are engaged respectively by the grinding wheel 31 and the stationary stop 28. The use of the dummy in apparatus as described in Specifications 581,113 and 581,114 is referred to, and it may also be used to keep a check on the form of the rotary tool.
Patent GB-557046-A (GB)
Title: Coating compositions
IPC: C09D161/02
Filed: 1942-04-29
Abstract: 557,046. Resinous condensation products. DU PONT DE NEMOURS & CO., E. I., and NEBEL, W. April 29, 1942, No. 5747. [Class 2 (iii)] A solution of a resinous condensation product is made by partially condensing a urea-and/or aminotriazine-aldehyde partial condensation product with a ketone-aldehyde partial condensation product in the presence of a lower aliphatic monohydric alcohol, preferably in the presence of an acidic catalyst. Suitable alcohols are ethyl, propyl, iso- and n-butyl, amyl and octyl alcohols and the monoalkyl ethers of ethylene glycol. The ketone may be acetone, methyl ethyl ketone, methyl isobutyl ketone, methyl amyl ketone, diethyl ketone or cyclohexanone. Part or all of the urea may be replaced by thiourea or a substituted urea. The aminotriazine may be melamine. Suitable catalysts are phthalic anhydride, benzoic, maleic, adipic or citric acid, rosin, acid salts, hydrochloric, sulphuric or phosphoric acid, mercuric, aluminium or stannic chloride, bromine or iodine and benzoyl peroxide. In a typical example methyl ethyl ketone, formaldehyde and sodium hydroxide in water are heated at 50-60‹ C. under reflux. The reflux condenser is replaced by a water-jacketed condenser and dimethylol urea, n-butyl alcohol and phthalic anhydride are added and heated at 95‹ C. Toluene is added and water is removed by distillation, toluene and n-butyl alcohol being returned via a separator to the reaction mixture. Further water is removed without return of the condensate to obtain the final product. The products may be used alone or with addition of cellulose nitrate, ethyl cellulose, ester gum, maleic acid-modified ester gum, alkyd resins, polyvinyl resins, plasticizers, pigments, dyes, waxes, metallic powders and hardening accelerators such as phosphorus pentoxide as coating compositions for wood, metal, glass, paper, rubber, moulded plastics, fabrics, leather, pellicles of cellulose and cellulose derivatives, starch, gelatin, zein, and clay ; as adhesives, impregnating and insulating compositions.
Patent GB-236255-A (GB)
Title: Improvements in or relating to the manufacture of cast or moulded articles
IPC: C04B5/00
Filed: 1924-03-06
Abstract: 236,255. Silva, F. A. de. March 6,1924. Castings other than metal; casting slag.- Hard, refractory bricks, tiles, crucibles, furnace linings and other cast or moulded articles are produced simultaneously with high grade steel of low carbon content directly from iron sand or titaniferous ores in an electric furnace, the slag being run direct from the furnace into moulds. According to one method, a layer of carbon, charcoal or graphite together with a carbide is spread over the titaniferous ore in an electric furnace such as described in Specification 239,249, [Class 39 (iii), Heating by electricity], and an electric current passed through the mixture so as to produce upon the surface of the material an intensely hot mantle composed of electric ares. Alternatively, the carbon &c. may be disposed round the walls of the furnace in the form of plugs or a number of electrodes. Another process consists in first subjecting the titaniferous ores to magnetic or other separation, fusing the concentrate in an electric arc furnace, and then adding the carbon, charcoal or graphite together with calcium carbide. The slag, consisting principally of titanic acid and other refractory materials such as titanium carbide, is preferably concentrated by known methods such as rotation of the furnace and is then cast direct into moulds where it may be subjected to heavy pressure to extrude air bubbles or spongy substances. One or more layers of powdered or sheet asbestos may be contained in the mould so that the slag either covers both sides of the asbestos sheet or may be located between two sheets of asbestos, the material so produced being suitable for roofing, walls, partitions, tiles, or linings.
Patent GB-834679-A (GB)
Title: Improvements in brick making machines
Inventor: HARTLEY LONSDALE COOPER
IPC: B28B17/00
Filed: 1957-02-21
Abstract: 834,679. Brick making machines. WHITTAKER & CO. Ltd., C. Feb. 20,1958 [Feb. 21, 1957], No. 5842/57. Class 87(2). A machine of the semi-plastic type in which the brick is moulded under pressure applied through a crosshead C operated by a connecting rod A has a cylinder B formed in this rod which transmits the motion of the operating cam to the crosshead of the machine, and in this cylinder a block D which forms the bearing for the journal of the crosshead is located, the block being a sliding fit in the cylinder, and a ram E is arranged in the cylinder. with its lower face resting on the bearing block, the cylinder above the block being filled with hydraulic fluid e.g. oil, whereby variations in the pressure transmitted by the connecting rod will also be transmitted to the fluid in the cylinder, and means responsive to such pressure variations are provided for actuating mechanism to adjust the bottom plate of the mould (not shown) and so control the density of the brick. To this end, a piston k is located in  a  second cylinder K communicating with the main cylinder B whereby pressure of the fluid above or below a predetermined value whilst a brick is formed causes either of the switches M, N, to be operated so energising solenoid  8  and raising plunger S out of socket t in cam wheel T and closing switch U which controls the geared motor 0 and rotates the shaft T<SP>1</SP>. The switch N also controls a third circuit which by-passes a switch P (which is closed by projection p on the cam wheel R of the machine only at each maximum pressure point of the pressing operation of the machine) to energise a magnet V which in turn holds a lever v to operate switches vl, v2, controlling a 3-phase motor starter W to give the correct direction of rotation of the motor 0 to increase the density of the bricks. Conversely, should the density-of the bricks be too great, lever L closes switch M, the third circuit controlled by the switch N is open and lever v falls to close switches v3, v4, thereby opening switches v<SP>l</SP>, v<SP>2</SP>, and reversing the phases through the motor starter W.
Patent GB-415468-A (GB)
Title: A handtool for cleaning gas stoves, ovens and the like
IPC: A47L17/06
Filed: 1933-02-27
Abstract: 415,468. Combination wire brushes; handles. PROSSER, D. J., Cynmer Avon, Heath Road, and KENNEDY, J. M., St. Andrews, Castle Road, both in Salisbury. Feb. 27, 1933, No. 5875. [Classes 19 and 61 (i).] A device for cleaning gas stoves, ovens, &c. comprises a brush stock 5 of triangular cross-section with wire bristles 6 fitted at the end with a scraper 9 and pivoted at 8 to the forked end 3 of a metal stem 2 secured in a handle 1 provided with a bore 13 housing a pricker 14 retained in the bore by a springy crook 15 engaging a slotted metal cap 12.