baber/WOPTO huggingface dataset:
Patent GB-478436-A (GB)
Title: Valve amplifying system for use in sound reproduction
IPC: H03G9/10
Filed: 1936-07-22
Abstract: 478,436. Valve amplifying circuits. STEVENS, A. H. (Newtone Engineering, Inc.) July 22, 1936, No. 20339. [Class 40 (v)] Amplifiers for sound reproduction are arranged to expand the volume range by applying to a negatively-biassed auxiliary grid a voltage varying with the sound volume. As shown, either an electromagnetic pick-up 1 or a photo-cell 2 may be switched through a volume regulator 4 to the input transformer 7 of an amplifier 9, which feeds further push-pull amplifiers 15, 35 energizing a speaker 43. The output of the amplifier 9 is also fed through amplifiers 50, 55 to a full-wave rectifier 60, the load resistance 63 of which is shunted by a smoothing condenser 64. The voltage across this resistance together with a bias derived from a potentiometer tapping 68 is fed to the inner grids of the amplifiers 15, a variable time-lag circuit 65, 76 being interposed. In this way the gain of the amplifiers 15 is increased as the sound volume increases. A valve 69 operating as a diode and connected across the resistance 63 provides an upper limit to the gain, which limit is variable by adjusting a potentiometer tapping 71. A triode valve 70 is also connected across the resistance 63, and its grid is connected to a variable tap 73 on this resistance and its cathode to a tap 74 on a bias potentiometer 75. By adjusting the taps 73, 74 the change in gain corresponding to any change in signal volume may be controlled. A switch 81 has all its contacts open during normal working with automatic volume control. When the switch is raised, contact 84 applies the bias of tapping 71 directly to the gain-control grids, and when lowered contact 83 applies the bias of tapping 74. In both positions the resistance 63 is shorted by contacts 82, 85 putting the automatic control out of action. The transformer 29 coupling the valve pairs 15, 35 has sections of its primary coil tuned to discriminate against intermediate frequencies. This discrimination is most effective when the impedance of the valves 15 is high, that is when the signal volume is low. When the signal volume is high, the valve impedance is low and the frequency discrimination disappears. The degree of frequency discrimination may be regulated by adjusting the input regulator 4, with a corresponding reverse adjustment of the output regulator 41 if it is desired to keep the output volume unchanged. Reference has been directed by the Comptroller to Specification 468,008.
Patent GB-262493-A (GB)
Title: Improvements in and relating to deck chairs and the like
IPC: A47C4/30
Filed: 1925-11-10
Abstract: 262,493. Balleny, S. Nov. 10, 1925. Seat bottoms and backs. - A seating surface for a deck chair comprises transverse slats 6 threaded on cords or the like 5 which pass into cross members 1 of the chair frame, one of which cross members has a channel 2 to receive the ends of the cords, or their securing means 4, and a closing member 3. Resilient distance pieces 7 may be provided between the members 1 and the slats.
Patent GB-184991-A (GB)
Title: Method of refining mineral oils obtained from earth oil
IPC: C10G21/20
Filed: 1921-07-29
Abstract: Petroleum oils are freed from resinous, tarry, and bituminous substances by agitating for say an hour with 30-70 per cent of toluidine, xylidine, phenylamine, or other aromatic amine with a benzene nucleus, allowing to settle, and separating the upper layer of refined oil.  The amines may be produced by nitrating the aromatic hydrocarbons obtained from anthracite coal-tar and reducing the nitration products; or a raw material, such as anthracite coal-tar distillates, containing these amines may be used.  The refined oil may be freed from any traces of amine by treatment with steam.
Patent GB-186754-A (GB)
Title: Improvements in devices for securing petrol cans and the like to motor vehicles
IPC: B60R9/02
Filed: 1921-07-29
Abstract: 186,754. Marshall, J., and Blackwell, J. July 29, 1921. Petrol cans, detachably securing to running- boards. - In a petrol-can holder the base of the can is gripped between fixed jaws A<2> and movable jaws C, the movable jaw being actuated by a screwed rod D normally locked against rotation by a spring-pressed plunger F or the equivalent adapted to enter a recess D<4> in the rod. The plunger is disengaged by a key with inclined end which enters the recess D<4>, the key serving also to rotate the rod D.
Patent GB-1191691-A (GB)
Title: Protection of Metal
Inventor: RAVAULT FRANK ERNEST GEORGE
IPC: C23F11/18
Filed: 1967-05-03
Abstract: 1,191,691. Coated metal; wax emulsion. FOSECO TRADING A.G. 24 May, 1968 [3 May, 1967], No. 20480/67. Headings B1V and B2K. [Also in Divisions C4 and C5] A protective coating composition for metals e.g. steel comprises carnauba wax or a physically similar wax and an alkali metal chromate or nitrate as corrosion inhibitor. Montan wax and ozokerite are specified. The composition is preferably formulated as an aqueous dispersion. In an Example a dispersion containing 8% by wt. carnauba wax, 2% borax (pH buffer), 2% sodium nitrite, 2% non-ionic dispersant and 86% water is prepared by mixing an aqueous solution of nitrile and borax with molten wax containing the emulsifier, and cooling, and then applied to the surface of steel objects.
Patent GB-139415-A (GB)
Title: Improvements in and relating to air-lift pumping
IPC: F04F1/06
Filed: 1919-08-20
Abstract: 139,415. Ricketts, A. T. Aug. 20, 1919. By acrating ascending column. -Liquid is raised in several stages by an air-lift pump comprising one or more open-ended rising mains b, c arranged within the main tube a, and each provided with a separate air pipe d, d<1>, d<11>. When several mains are used, the lower end of each enters the head of the main below it.
Patent GB-642740-A (GB)
Title: Improvements in or relating to nursing devices
IPC: A61J9/00
Filed: 1947-07-30
Abstract: 642,740. Teats for feeding bottles. ALLEN, A. M. July 30, 1947, No. 20543. Convention date, May 27, 1946. [Class 125(i)] A teat comprises a thickened rim portion which is connected to a nipple portion by means of a portion in the form of a thin membrane which simulates the areola of the breast and is incapable of supporting said nipple in a distended position above the rim of the teat, so that the nipple collapses within the area of the rim when the teat is in a relaxed position but allows a nursing baby to draw out and elongate the nipple when he sucks. A teat D, shown in its extended position in Fig. 5, is made of rubber or similar material and has a nipple 42 of medium rigidity at N and whose thickness tapers rapidly to a point 34 where it flares outwardly and merges into an areola portion B of membrane thinness so that the nipple 42 will collapse within or slightly above a rim 10, as shown in Fig. 3, when in a released position. Fig. 8 shows a modification in which integral spaced thickened portions 40 extend from the rim 10 to the nipple 42, and Fig. 12 one in which the areola portion has thickened intermeshed areas 54, 58 which diverge radially towards the rim 10 so that the thickened areas are separated by areas of membrane 52. These two modifications provide some direct stability for the nipple 42, limit the elongation of the nipple 42 after it has reached the distended position shown in Fig. 5, and prevent excessive collapsing of inner walls of the nipple 42 when under pressure. The mouth of a container of non-rigid material is placed around an outer flange 14 of the rim 10 which is bent upwardly and outwardly at 12 to form an annular space into which a rigid ring 16 is placed to provide rigidity when the container 20 is sealed to the nursing device by means of a band 18 gripping the upper edge of the container 20 against the flange 14. In a modification, the ring 18 is embedded or enclosed in the rim 10. A further method of sealing the nursing device to the container 20 is shown in Fig. 17, in which the upper edge 70 of the container 20 is bent outwardly over an inner rigid band 72, there being an outer band 74 which slips over the inner band 72 to grip the edge 70 in liquid tight relation between the bands. A coating of sealing material 76 such as rubber may be deposited on the inside of one or both of the bands 72, 74. A bead 78 on the band 74 allows the teat to be snapped into engagement in sealing relation by means of a tab 80. Specification 642,741 is referred to.
Patent GB-1328448-A (GB)
Title: Gear wheel with lubricating means
IPC: F16N7/36
Filed: 1971-04-19
Abstract: 1328448 Lubricating STAL-LAVAL TURBIN AB 19 April 1971 [30 Jan 1970] 20645/71 Heading F2A A gear-wheel 1 is lubricated by a non-torque transmitting lubricating gear-wheel 2 which has an axial hole, for the reception of oil, and radial channels 7 extending from the hole through the teeth 6 to deliver oil to the base of the teeth of the gear-wheel 1. The lubricating gear-wheel 2 is supplied with oil from a pipe 4 provided with ports 5 through which oil is sprayed into the hole 3 from which it is forced through the channels 7 by centrifugal force.
Patent GB-479029-A (GB)
Title: Improvements relating to the construction of concrete floors, roofs and like structures cast in situ
IPC: E04G11/56
Filed: 1936-07-25
Abstract: 479,029. Floors; moulding in situ. WALKER, J. H. July 25, 1936, No. 20657. [Classes 20 (ii) and 20 (iv)] Temporary beams for supporting floor and like shuttering comprise two adjustable interfitting portions 1, 2, of invertedchannel shape, releasably secured together by clamps 3, and provided at their ends with centrally disposed, upwardly projecting supporting members 9, the two portions being removable separately from the set concrete, after release of the clamps, by rotation about the supported ends. To prevent displacement of the beams during the casting process, they are secured by suitable means, such as bolts or wire ties 21, to the reinforcing bars of the floor structure, which is preferably assembled in the manner described in Specification 227,522, [Class 20 (iv)], the ties being cut after the concrete has set in order to permit removal of the beam sections. The beams are maintained in a vertical position by means of rods 13 inserted in slots 14 at the ends of the beams and extending from one beam to another. As shown in Fig. 4, preformed blocks 13 may be laid upon the beams 16, which latter are connected by the ties 21, to bars 20 resting on the upper surfaces of adjacent blocks, concrete being deposited over and between the blocks. Instead of using permanent shuttering, temporary shuttering comprising metal sheets 23, 24, Fig. 6, may be laid upon the beams 16, with the edges of adjacent plates spaced apart along the beams, and spaced apart or overlapping in a direction perpendicular thereto. The spaces 25 between the plates are filled with sand or other suitable material, and temporary or permanent beams or the like placed upon the supporting beams. In the construction shown in Fig. 6, rubber and wooden strips 28, 31, are placed upon the beams, the rubber strips being removed after the concrete has set, and imitation beams, electric light, or similar conduits, attached to the members 31. Alternatively, the spaces between the shuttering members may be occupied by the lower portions of beams which remain embedded in the soffit and project slightly therefrom, and which may be suitably coloured. If the soffit is to have a permanent surface of cork sheeting, or the like, such sheets may be laid upon the temporary supporting beams and the shuttering members dispensed with. Specification 428,208 also is referred to.
Patent GB-428742-A (GB)
Title: Improvements in rock crushers
IPC: B02C2/04
Filed: 1934-07-14
Abstract: 428,742. Conical mills; gyratory crushers. BROWNING, R. E., 4380, Grand Boulevard, Montreal, Canada. July 14, 1934, No. 20694. [Class 59] Each crushing member rotates about an axis inclined to the other, the upper portions of the crushing members being concentric with their axes of rotation but eccentric to each other, whilst the lower portions of the crushing members are concentric with their axes of rotation and with each other but travel in relatively inclined planes or paths. As shown, the rotary crushing head 11 is mounted on a spigot 11<a> and secured by bolts 37 to a skirt 10<a> of a hollow shaft 10 mounted in bearings 14, 20 and driven from a shaft 28 through bevel gear 27, 19. The head is provided with ribs b and revolves inside a crushing surface 38<a> provided with ribs and secured by bolts 40 to a casing 39 revoluble in bearings 47, 48. The bearing 47 is adjustable by worm-wheel 62 and worm 63 and the outer casing 52 which carries the crushing surface 38<a> is held down by bolts 72 and springs 75. The casing 52 seats on a ring 65 adjustable vertically by worm 68 to vary the distance between the crushing surfaces. The axis of crushing surface 38<a> is inclined to the axis of the head 11 and intersects the latter at A, the crushing surfaces of both members being concentric at 38<c>. A circular dust protector 81 is attached to bolts 86 and ribs 79, 101 prevent access of dust to the bearings. The material to be crushed is fed through an orifice 90 and is crushed by the ribs b with combined pressure and twisting action due to the inclination of the surface 38<a> relatively to the head 11 and to rotation of the surface 38<a> due to frictional contact with the head. In Fig. 3 the head 11 is mounted on a rotary shaft 10 and the opposed crushing surface 38 is rotatable by frictional contact with the head. The surface 38 is carried by members 103, 104 forming a kind of ball joint with the casing 114, which is held down by spring bolts 115, and with the gap-adjusting casing 109. Uncrushable material causes the surface to rise vertically and rotate with the head 11 until it is cleared or the mill stopped. When the crushing gap is altered the ball joint automatically adjusts itself for a uniform discharge gap and the set screws 211 are then adjusted to this position.
Patent GB-473419-A (GB)
Title: Lubricating device for sewing machine loop-takers
IPC: D05B71/00
Filed: 1937-07-27
Abstract: 473,419. Sewing machines. FAIRWEATHER, W. C. (Singer Manufacturing Co.) July 27, 1937, No. 20699. [Class 112] A rotary loop-taker has a lubricant-absorbing pad secured against the outer face of the cylindrical wall of the thread case. The pad 24 is held against the outer face of the side wall 11 of the thread case 12 by a strap 25 secured at its ends by screws 26. Lubricant is supplied to the top of the pad and seeps along and through the pad to supply oil to the bearings.
Patent GB-752723-A (GB)
Title: Method of rolling chromium manganese austenitic steels
IPC: C21D8/00
Filed: 1954-07-15
Abstract: An austenitic chromium-manganese steel contains ..C up to 0,15 per cent ..P up to 0,05 per cent ..S up to 0,04 per cent ..Mn 14,0-18,0 per cent ..Si up to 1,0 per cent ..Cu up to 0,9 per cent ..Ni up to 0,99 per cent ..Cr 14,0-18,5 per cent ..N up to 0,15 per cent
Patent GB-477703-A (GB)
Title: Brake blocks, particularly for use on cycle brakes
IPC: F16D69/00
Filed: 1936-07-27
Abstract: 477,703. Brake shoes. FIBRAX, Ltd., and PETRIE, W. July 27, 1936, No. 20722. [Class 103 (i)] Brake blocks of impregnated fabric having a dovetailed portion to be received in an appropriate shoe have a discontinuous operative surface which may be formed by one or more transverse part cylindrical transverse notches 12a or by a number of transverse grooves intersected by a longitudinal groove.
Patent GB-647462-A (GB)
Title: Moulding concrete blocks
IPC: B28B13/04
Filed: 1946-07-11
Abstract: 647,462. Moulding concrete tiles &c. WINN, H. J., METROPOLITAN CONCRETE WORKS, Ltd., and STRADLING, Sir R. E. July 11, 1946, No. 20796. [Class 87 (ii)] Relates to moulding- machines for concrete of the type carrying a platen upon which rests the pallet for the article to be moulded, this platen being lifted after moulding to lift out of the mould the pallet with the concrete article upon it. According to the invention, transfer mechanism is provided to receive the pallet carrying the article and transfer both of them to a conveyer when the platen is lowered. Vertically slidable pillars 3 for lifting the platen 1 are connected by links 4, 5 to a shaft 6 mounted in the frame. Arms 18 operating transfer forks 17 are also connected to the shaft 6 by links 21, 24, lost-motion connections such as pin 22 and slot 23 being provided between the arms 18 and links 24. When the lever 7 is drawn in the direction of the arrow the links 4, 5 straighten to raise the platen 1 and, at the same time, forks 17 slide forward on beams 16, the lost motion 22, 23 ensuring that the forks do not pass between the platen 1 and the pallet 13 until the latter are high enough. When the lever 7 is moved back to lower the platen, the transfer forks, now supporting the pallet 13 and moulded article 12, move backwards to deposit them upon a conveyer 11. A vibrating device, not shown, is attached to the underside of the platen 1.
Patent GB-406653-A (GB)
Title: Improvements in or relating to the treatment of textile or other materials made of or containing cellulose esters or ethers
IPC: D06P5/06
Filed: 1932-07-23
Abstract: Colourations on cellulose ester or ether materials are improved by applying to the coloured materials a compound capable of improving the fastness of the colourations such as thiourea, or any of the compounds specified in Specifications 340,541, 340,572, 355,726, 361,362 and 378,473, and then steaming to fix the said compound on the materials, either at slightly above 100 DEG  C. under increased pressure or below, under decreased pressure.  The compounds may be applied in any desired manner, and may be assisted by solvents or swelling agents for the materials, among which are mentioned ethyl lactate and diacetone alcohol. According to an example, cellulose acetate, dyed blue with monomethyl-4 : 8-diaminoanthrarufin, is padded with aqueous thiourea and steamed, giving dyeings resistant to fading.  Other celulose esters are specified and ethers and mixtures of these with cotton, wool, silk and regenerated cellulose are included. Specification 373,628 also is referred to.
Patent GB-1288446-A (GB)
IPC: B23K1/20
Filed: 1970-04-30
Abstract: 1288446 Making rotors; soldering DAIMLERBENZ AG 30 April 1970 [10 May 1969] 20879/70 Headings B3A and B3R In soldering blades into a rotor body, comprising a hollow annular member, for a hydrodynamic unit the blades 4 are positioned substantially radially in the member 1 which is disposed with its axis vertical and its hollow interior upwardly, two rings of soldering material 6a, 6b are placed at the ends of the blades and the assembly is heated to melt the soldering material. Curved blades 4 are positioned radially in the annular dished body part 1 of a torque converter and an annular dished body part 5 is placed in a recess formed by the blades. The blades are located by slotted strips and four rings of solder 6a, 6b, 6c, 6d are placed on the blades, the assembly is heated in a protective gas and the solder flows between the blades and the parts 1, 5, the part 5 possibly being loaded with a ring. The unit may be a coupling or transmission brake.
Patent GB-597373-A (GB)
Title: Improvements in and relating to arc lamps
IPC: H05B31/00
Filed: 1945-08-17
Abstract: 597,373. Arc lamps. GENERAL ELECTRIC CO., Ltd., and HAWKINS, F. S. Aug. 17, 1945, No. 21036. [Class 39 (i)] An arc lamp of the high intensity type includes a plurality of negative electrodes each associated with a separate ballast resistance and all cooperating in parallel with a single positive electrode. In Fig. 2, two negative electrodes 1, 2 face the tip 5 of the horizontal positive electrode 6 and are symmetrically disposed at 30 degrees to the horizontal and 100 degrees to each other. In another arrangement, three negative electrodes are disposed, two at 30 degrees above and the third at 70 degrees below the horizontal plane in which lies the positive electrode. In another, two negative electrodes lie parallel to each other at right angles to the positive electrode. In a fourth arrangement, two negative electrodes at 100 degrees to each other lie at 30 degrees inclination to the horizontally disposed positive electrode. The positive electrode has a highly mineralised core of relatively large diameter, i.e. greater than one-third of that of the diameter.
Patent GB-946344-A (GB)
Title: Improvements in or relating to brazing end closures to tubular members
Inventor: LLOYD HENRY
IPC: G21C3/10
Filed: 1961-06-13
Abstract: 946,344. Brazing; welding by fusion. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. June 1, 1962 [June 13, 1961], No. 21260/61. Heading B3R. [Also in Divisions G1 and G6] A method of brazing an end closure member to a tubular member comprises producing a capillary film of braze metal between the members, the area of the joint being limited in two directions by spacing the members too far apart to allow capillary flow to take place. As seen in Fig. 1, the tube 1, in this case a stainless steel nuclear fuel can, has placed within its end a cup shaped cap 2 also of stainless steel. A ring of brazing material 4 is forced on to a peripheral shoulder 3 of the end cap, and the exterior of the ring 4 is a force fit in the tube 1. Brazing is achieved by placing the assembly in a vacuum chamber and heating to 1080-1100 C., when the brazing metal ring 4 melts and flows by capillary action to braze the end cap to the tube between the two annular shoulders 3, 5. The volume of the ring 4 is just sufficient to fill the capillary volume and form a small fillet about the shoulder 3. The brazed assembly is prepared for welding by rolling the cap to close the outermost gap 5 between the cap and tube. The edges are then sealed at 7 in Fig. 2 by a standard argon arc welding process. In a modification an annular hollow 8, Fig. 3, is left beneath the welded edges, and this hollow is filled with a tracer gas for checking the weld for leaks. The reservoir may be filled with tracer gas by incorporating this in the argon gas shield during the welding.
Patent GB-320893-A (GB)
Title: System and apparatus for the electrical recording and reproducing of sound
IPC: H04R1/20
Filed: 1928-07-23
Abstract: 320,893. Stephens, A. J., (Loughridge, M. H.). July 23, 1928. Amplifying systems; gramophone pick-ups.-The input and output circuits of an amplifier of the rotary electromechanical type A, B, C, Fig. 1, are associable respectively by means of switch 44, 30 with a microphone 40 and an electromagnetic stylus head 37 for recording or with the stylus head 37 and a loud-speaker 33 for reproducing. In the arrangement shown in Fig. 2, spring fingers 61 carried by the tone-arm engage contact segments 60 on the stylus head and the rotation of the latter through 180‹ from recording to reproducing position and vice versa automatically effects the circuit changes produced by the switch 44, 30, of Fig. 1. The stylus head may comprise a pair of magnets 71, 72, Fig. 5, held by a clamp 73 and provided with pole-pieces 75 to which is secured a flat spring member 76 carrying an armature 77 and the recording and reproducing styluses 56, 57. The amplifier comprises three similar dynamo-electric machines A, B, C, progressively increasing in size, their circuits being connected in cascade. All the armatures are mounted on the same shaft 13 and in order to prevent interference from the " hum " generated by the running of the machines, the frequency of this " hum " is raised above the audible range by driving the shaft 13 at a hign speed and by placing the commutators and brushes of the machines in staggered relationship.