baber/WOPTO huggingface dataset:
Patent GB-1176241-A (GB)
Title: Tubular Structures
Inventor: SECORD HERBERT CAMPBELL
IPC: B21C37/12
Filed: 1966-01-24
Abstract: 1,176,241. Metal pipes. H. C, SECORD. 24 Jan., 1967 [24 Jan., 1966], No. 3073/66. Heading F2P. [Also in Division B3] A metal pipe is made by helically winding one or more metal strips in self-overlapping relation so that each strip progresses stepwise from the bore to the skin of the structure. The laps are held together by friction but their grip may be reinforced by special surface treatments, sealants, synthetic adhesives or a solder-type bond. The pipe may be provided with a plastics or epoxy-type paint liner. When the pipe is made from two strips they may be superimposed or arranged side by side. The pipe may be made by winding one strip clockwise and a second strip counterclockwise over it.
Patent GB-976390-A (GB)
Title: Improvements in or relating to hydraulic vibration dampers
IPC: F16F9/092
Filed: 1962-01-26
Abstract: 976,390. Hydro-pneumatic shock-absorbers. RHEINMETALL G.m.b.H. Jan. 26, 1962 [Feb. 11, 1961], No. 3081/62. Heading F2S. In a piston and cylinder vibration damper 1, 2 having an annular compensating chamber 10 surrounding the working cylinder 1 and several resilient pressure cushions 12 arranged in the compensating chamber, each pressure cushion consists of an air, or gas-filled, flexible tube which extends approximately over the full length of the cylinder 1. Oil, displaced by a piston rod 3 as it enters the cylinder 1, passes through bores 8 in a valve ring 7, past a cup-valve 6, and through a number of bores 9 in the cylinder 1 into the compensating chamber 10 which is located between the cylinder 1 and an outer casing 11. Four pressure cushions 12, circumferentially spaced around the compensating chamber 10, each consist of a gasfilled flexible tube which is completely closed. During a rebound stroke a valve 4 in the piston 2 closes and hydraulic liquid is urged out of the space 5 above the piston 2 and past the valve 6 into the compensating chamber 10, fluid from the lower end of which flows through orifices 15 and a non-return base valve 17 into the cylinder 1 below the piston 2. The tension of the cup valve 6 can be regulated by turning the valve ring 7 when the damper is fully extended so that lugs on a plate 14 mounted on the piston can be engaged in corresponding slots 13 in the valve ring 7.
Patent GB-376665-A (GB)
Title: Improvements in water tube steam boilers
IPC: F22B17/10
Filed: 1932-02-02
Abstract: 376,665. Water-tube steam boilers. BABCOCK & WILCOX, Ltd., Babcock House, Farringdon Street, London.-(Babcock & Wilcox Co ; 85, Liberty Street, New York, U.S.A.) Feb. 2, 1932, No. 3141. [Class 123 (ii).] Double-unit steam boilers comprise uptake and downtake cylindrical headers 10, 11 for each unit with a bank or banks of curved tubes 12 connecting them and a separate steam and water drum 8, a cross drum 15 connected by nipples 14 to the lower ends of the downtake headers and by a curved tube bank 16 to a cross drum 17 connected to the uptake headers, and a superheater 23 between the tube banks of each unit with a connection to a saturated steam distributer communicating with both steam and water drums. A partition 19 in the drum 17 prevents surging of water from one unit to the other.
Patent GB-1123924-A (GB)
Title: Improvements relating to the production of phosphoric acid by the wet method
IPC: C01B25/22
Filed: 1966-01-24
Abstract: In a process for the production of CaSO4 and H3PO4 wherein conc H2SO4 and crushed natural phosphate are introduced into a circulating paste of CaSO4 and H3PO4 and part of the paste is continuously withdrawn, the H2SO4 is dispersed into the paste by centrifuging from horizontal slots in the hub of a stirrer.  The phosphate may be added immediately before or after the H2SO4.  The conditions may be regulated to yield gypsum, a -semihydrate, or anhydrite.  If the temp. of the paste immediately after addition of H2SO4 is 70 DEG  C., gypsum crystals 200-350m  in size are obtained.  If this temp. is above 70 DEG  C., crystals less than 1m  in size of the b semihydrate are formed, and the temp. of the paste is then reduced to 70 DEG  C. to give gypsum crystals 800-1000m  in size.  In Fig. 3 (not shown) phosphate is mixed with recycled paste in tank C1, and passes into H2SO4 dispersing device D1, and thence through crystallizing tanks C2 and C3 to reserve tank C4.  Temp. is measured at the outlet of D1 and used to control the amount of paste recycled from C3 to C1. The temp. in C2 is controlled by adding wash water and by recycling part of the paste from C3 through vacuum cooler E. In Fig. 4 (not shown) phosphate and H2SO4 are both fed to tank 6.  The H2SO4, and wash water from 24 (via 29) are fed down 2 concentric conduits in the shaft of stirrer 5, into the hub, and emerge separately through horizontal parallel slots between each of the 4 stirrer blades (Fig. 5, not shown). The paste passes from tank 6 to crystallizing tanks 8 and 9, reserve tank 10, and filtration unit 24. Paste is recycled from 9, through vacuum cooler 15, to tanks 6 and 8. The temp. in tanks 6 and 8 is controlled by the rate of flow of recycled paste, or by the introduction of air under pressure into the upper layers of paste.  Tanks 6-10 are kept under slight vacuum.  The paste may contain 60-70% H3PO4, and the product H3PO4 have a P2O5 content of 30-32%.
Patent GB-792304-A (GB)
Title: Improvements in or relating to wood preserving compositions
Inventor: COOK CHARLES DONALD
IPC: B27K3/32
Filed: 1955-02-03
Abstract: 792,304. Preserving wood. HICKSON'S TIMBER IMPREGNATION CO., (GREAT BRITAIN), Ltd. Jan. 27, 1956 [Feb. 3, 1955], No. 3212/55. Class 140. A free-flowing powder to be dissolved in water for use as a wood preservative comprises in admixture a free-flowing alkali metal or ammonium arsenate which at a concentration of 12g/l gives a pH of 2 to 4.6, a non-deliquescent copper and/or zinc salt, and one or more of potassium dichromate, ammonium dichromate, and anhydrous sodium dichromate. Preferably a 4 g/l solution of the powder gives a pH of 2 to 2.8 while the arsenate is sodium arsenate and if copper sulphate pentahydrate is used the arsenate contains less than 70 per cent by weight arsenic pentoxide on an oven dry weight at 100‹ C. As a zinc salt, zinc sulphate heptahydrate may be used. By using potassium dichromate, a powder which does not paste on exposure to the air is obtained. The wood-preservative powder composition may also contain sodium bifluoride, cresols, or dinitrophenol and sodium sulphate or bisulphate may be added to the powder to lower the pH of the preservative solution. Specification 792,305 is referred to.
Patent GB-400471-A (GB)
Title: Improvements in or relating to railway signalling systems
IPC: B61L23/16
Filed: 1933-02-02
Abstract: 400,471. Electromagnetic switches. GENERAL RAILWAY SIGNAL CO., Rochester, New York, U.S.A.-(Assignees of Bennett, J. ; 22, North Road, Scottsville, New York, U.S.A.) Feb. 2, 1933, No. 3227. Convention date, Feb. 4, 1932. [Class 38 (v).] In a railway signalling system in which polar and neutral armatures of direct-current polarneutral relays HDR control the signals R, Y, G in accordance with the polarity of current supplied to the relay over the neutral armatures of an ahead relay, the neutral armatures are prevented from momentarily dropping, during the reversal of current, by means of an auxiliary hold-up electromagnet 40 inductively energized from the winding of the relay HDR from the magnetic circuit thereof. A flashing of the red signal R is thus prevented.
Patent GB-854066-A (GB)
Title: Improvements relating to negative feedback amplifiers
Inventor: HUNTLEY KEITH GORDON
IPC: H03F1/50
Filed: 1956-02-02
Abstract: 854,066. Valve amplifying circuits; transistor amplifying circuits. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 4, 1957 [Feb. 2, 1956], No. 3272/56. Class 40(6). In an amplifier of the "see-saw" type, comprising a voltage amplifier 1 resistance-coupled to a cathode-follower 9, from the cathode load 12 of which negative feedback is applied back to the grid of the amplifier 1 via resistor 13 and resistor 7, which is in series with the input, the pass-band is extended at the high-frequency end by connecting a resistor 16 in the grid lead to the cathode follower 9. The valve of the resistor 16 is such that in conjunction with the input capacity 17 of the valve 9 it provides a second phase-shifting circuit, the first being the anode load 2 of the valve 1 in conjunction with the output capacity 15: the Specification gives a mathematical expression for the conditions giving maximum bandwidth. The desired additional phase-shifting circuit may alternatively be obtained by adding capacity between the grid of valve 1 and earth, or by adding it between a tap on the feedback resistor 13 and earth. The invention may also be applied to transistor amplifiers, in which case the second stage comprises one of the emitter follower type. Specification 657,026 is referred to.
Patent GB-467743-A (GB)
Title: Improvements in, or relating to, electrical socket-couplings and switch-socket combinations
IPC: H01R13/453
Filed: 1936-02-04
Abstract: 467,743. Plug-and-socket couplings. CRABTREE & CO., Ltd., J. A., and Mc- LOUGHLIN, H. F. Feb. 4, 1936, No. 3303. [Class 38 (i)] To prevent incorrect insertion of the plugpins, spring-positioned refractory shutters a, b, mounted on lever arms d<2>, d<3>, Fig. 3, pivoted at d<4> normally cover the current-carrying socket tubes and each is moved to inoperative position by insertion of a pin in the other tube. Thus the pin entering the pin-entry hole c<2> displaces the arm d<3> and shutter b, but,is prevented from entering its socket tube by the shutter a which can only be displaced by the other pin. In a modification, Fig. 6, the shutters are formed with pivotal projections engaging in the upper and lower cover plates and have apertures a3, b<3> with chamfered sides.
Patent GB-1169981-A (GB)
Title: Rechargeable Dry Cells
Inventor: DAVIS STANLEY MYRON
IPC: H01M4/60
Filed: 1967-01-23
Abstract: 1,169,981. Rechargeable dry cell with azodicarbonamide depolarizer. AMERICAN CYANAMID CO. 23 Jan., 1967 [23 Feb., 1966], No. 3374/67. Heading H1B. A rechargeable dry cell comprises a zinc anode, a separator and a cathode mix comprising carbon black, azodicarbonamide and an aqueous electrolyte. In a modification biurea may be used in place of the azoidcarbonamide, the cell being charged by passage of a current to oxidize the biurea to azodicarbonamide. The carbon may be acetylene black and preferably has a  surface area exceeding 200 sq. m. per gram. Suitable electrolyte salts are those of Zn, NH4, Mu or Mg, e.g. the chlorides and bromides; best results are obtained from combinations of ZnClg with NH 4 Cl or MuCl 2 . Suitable separators include kraft paper; kraft paper treated with starch, carboxymethyl cellulose and/or cereal paste; vegetable parchment; or, preferably, a laminate of a cellulosic paper with " Cellophane " (Trade Mark) or porous films of nylon, polyester, polyolefin, polyacrylate, polyvinylacetate or polyvinylchloride, of pore size 5-40 .When biurea is used a small amount of ZnO or other base, e.g. BaO, may be added. In examples cells are constructed using " AA " size Zn cans, lined with a laminated " Cellophane " or starchkraft paper separator and filled with depolarizer mixture with a concentrically inserted carbon rod collector. The mixtures used comprise, in Example 1, azodicarbonamide, carbon black and aqueous solutions containing 35% ZnCl 2 and 20% NH 4 Cl, or 17% ZnCl 2  and 27% NH 4 Cl, and in Example 2, biurea, with and without an equal weight of azodicarbonamide, carbon black, with and without ZnO, and the same electrolytes as above, with and without an added 0.3% of HgCl 2
Patent GB-1360304-A (GB)
Title: Card feeding apparatus
IPC: G06K13/10
Filed: 1972-01-25
Abstract: 1360304 Feeding sheets AUTOMATA CORP 25 Jan 1972 [5 March 1971] 3452/72 Heading B8R Data cards are separated from a pile by a friction roller 52 which protrudes from the surface of a plate 32 and forwarded through a throat 102 into the nip of feed rollers 76 and 80. To ensure a regular feed the pile may be supported on a plate 42 and periodically lowered into contact with the roller 52 by actuation of a solenoid 50. The solenoid may be controlled by the passage of cards over a feeler arranged beyond roller 76 or by passage of the cards beneath an optical sensor 26<SP>1</SP> which detects timing pulses provided on the cards. The sensor may comprise part of an optical reading station for the data on the cards. In an alternative embodiment the roller 52 may be coupled to its drive shaft through a limited lost motion connection, the slack in which is taken up when the roller 52 is rotated by the card being gripped and fed by rollers 76 and 80. The drive shaft of roller 52 must then rotate through the slack angle before positive drive is re-established, thereby spacing the fed cards. Idler rollers 80 may be skewed to side register the cards for reading. Feed rollers 78 and 82 serve to remove the cards to a delivery location.
Patent GB-607443-A (GB)
Title: Improvements relating to thermionic valve relay circuits
IPC: H04L25/04
Filed: 1946-02-04
Abstract: 607,443. Valve relay circuits. PELLE, P. Feb. 4, 1946, No. 3524. Convention date, Feb. 15, 1945. [Class 40 (vi)] In a thermionic valve relay circuit for relaying telegraph signals, impulses from a local source are applied to the valve control grid to determine the instant at which the output from the anode is applied to one or other of the windings of a differential polarized relay connected in the anode circuit. In the Figure, modulation signals are applied to relay R1, the contacts t1 and r1 of which connect the anode of valve L to H.T. supply via one or other of the coils of the polarized and differential relay R2. Impulses, which may be derived from a local source I are applied to the grid of valve L so that this valve periodically conducts. The contact a2 of relay R2 connects either positive or negative potential to a line C. The armature of relay R2 is stable in either position, so that when relay R1 operates, the change in potential applied to the line C occurs when the next impulse is applied to the grid of the valve. Modulation applied to relay R1 is thus repeated to line C, but the instants of change-over are made to correspond with one of the impulses applied to the control grid.
Patent GB-231624-A (GB)
Title: Improvements in or relating to cans and closures therefor
Filed: 1924-02-11
Abstract: 231,624. Hildebrandt, E., and Hildebrandt, H. Feb. 11, 1924. Lever lids; sealing- devices for stoppers and other closures.-A can is formed either with an inwardly-turned bead 13, Fig. 2, with an inwardlydirected annular groove below it, or with an outwardly-turned bead and an outwardly-projecting annu-. lar ridges as shown in Fig. 3, both forms being adapted to be closed by a dished channel-edged flanged cap adapted to be removed by prising. The channel 21 is preferably tapered as shown in Fig. 2, and sealing material 4 may be interposed between the bottom of the channel and the bead. A lug 25, stamped out of the lid flange and bent either against the upper side of the groove 10, Fig. 2, or against the underside of the bead 13, Fig. 3, acts as a tell-tale to detect tampering with the can.
Patent GB-1419470-A (GB)
Title: Electronic organs
IPC: G10H1/34
Filed: 1974-02-20
Abstract: 1419470 Stop tablets WURLITZER CO 20 Feb 1974 3588/75 Divided out of 1419468 Heading G5J [Also in Division H1] A stop tablet construction for an electronic organ comprises a one-piece moulded plastics housing 80 comprising cavities 84 with bearing surfaces 120 for rockably mounting hollow one-piece moulded plastics stop tablets 86 having corners 124 riding on the bearing surfaces and side walls 118 with fingers 128 carrying keepers 130 engaging under the side walls 92, 94 or 96 of the cavities, the side walls 118 also having projections 132 which interlock with projections 134 on the cavity walls to hold the stop tablets in the "on" or "off" position. The housing 80 has depending lips (108, 110, Fig. 2, not shown) carrying stop pad cushions (112, 114) limiting the switching movement of the stop tablets and slots 100 for receiving spring wire electrical contacts 102 (Fig. 2, not shown) which contact a bus bar (106) when the switch is in the "on" position.
Patent GB-1358208-A (GB)
Title: Steel reinforced glass material
IPC: C03B11/14
Filed: 1972-01-26
Abstract: 1358208 Glass steel composite SCHLADITZWHISKERS AG 26 Jan 1972 [27 Jan 1971] 3609/72 Heading C1M A composite glass/steel material comprises steel fibres having a diameter of less than 50 microns and which form at least 25% but not more than 90% of the total volume of the material, the remainder being glass. Preferably the coefficient of thermal expansion of the glass at room temperature is less than that of the steel. The fibres may be coated with an oxide layer to improve their adhesion to the glass. The steel fibres are produced by the decomposition of iron carbonyl in a magnetic field at a temperature of between 200‹ and 350‹ C. Chromium, molybdenum or nickel carbonyls may be uninstantaneously decomposed so that the fibres also contain one of these elements. The glass, which is preferably soda-lime glass is mixed in powdered form with the fibres and the mixture formed into moulded bodies and sintered at 500‹ C. Alternatively the mixture may be extruded at above 500‹ C. During either process the fibres may be aligned by the influence of a magnetic field.
Patent GB-564902-A (GB)
Title: A surgical appliance for arresting haemorrhage
IPC: A61B17/132
Filed: 1943-03-08
Abstract: 564,902. Haemorrhage arresting appliances. PETEGEM, J. J. VAN. March 8,1943, No. 3749. [Class 81 (ii)] A first-aid surgical appliance, for arresting bleeding from a wound in the arm or leg, comprises two steel arms A, B hinged together so that they may be adjusted with respect to each other, the arms A, B co-operating around the arm or leg of the patient to exert pressure on the artery above the wound by virtue of their springiness. The arms A, B are looped at C, D and E and attached by washers F, G and bolts H, the bolts H. carrying, through ball - and socket connections, discs K, L padded with rubber &c. P, Q, which are, respectively, convex and concave on their outer surfaces.
Patent GB-451423-A (GB)
Title: Improvements in or relating to prepayment meter mechanism
IPC: G07F15/08
Filed: 1935-02-05
Abstract: 451,423. Prepayment mechanism for meters. ENGLISH ELECTRIC CO., Ltd., 28, Kingsway, London, and TILSTONE, G., Siemens Works, Stafford. Feb. 5, 1935, No. 3765. [Class 27] Price-changing mechanism.-Means for permitting a variable or adjustable lost motion, for price-changing purposes, between the coinoperated mechanism of a prepayment meter and the credit mechanism driven thereby, comprises a differential gear having one element free to rotate idly in combination with a stop device which can be set to arrest said free element after a predetermined lost motion. A shaft 7 which is turned by a setting knob through half a revolution at each coin insertion has fixed to it the carrier arm 6 of the planet pinions 1, 2 of a differential mechanism, the sun-wheels 10, 20 of which are loose on the shaft. The pinions 1, 2 mesh with each other and are supported in a frame hinged at 5 to the arm 6 and constrained by a spring 9 so that each planet pinion is held in mesh with its sun-wheel. The wheel 20 drives the crediting differential mechanism and in addition to being held by such mechanism is held frictionally through wheels 21, 22 and a spring washer 23. The wheel 10 is biassed by a spring 11 to a position where a stop 12 thereon engages a fixed stop 13. When the shaft 7 is rotated, the wheel 20 is held and the wheel 10 rotates idly until the stop 12 meets an adjustable stop 17 positioned according to the price per unit. Further rotation of the shaft 7 now drives the wheel 20 and the crediting mechanism. During the last part of the movement of the shaft 7, an extension 1a from the pinion 1 engages an auxiliary fixed pinion 14 which moves the pinion 1 out of engagement with the sun-wheel 10. This wheel 10 now moves back under action of the spring 11 to its initial position against the fixed stop 13, and the pinion 1 becomes engaged with it again. When the next coin is inserted, the action is repeated, the extension la engaging a second releasing pinion 14a. The position of the stop 17 is adjusted by an arm 15 carrying the stop and adjustable over a scale 19 by an operating and locking knob 18. The position of the stop is indicated by a pointer 16.
Patent GB-911419-A (GB)
Title: Improvements in or relating to supporting devices
IPC: F21V21/32
Filed: 1961-02-01
Abstract: 911,419. Stands; brackets. MEIJS, P. J. Feb. 1, 1961 [Feb. 4, 1960], No. 3791/61. Classes 52 (3) and 52 (5). An adjustable " stay put " support comprises a socket carrying a measuring instrument 16 and mounted on an articulated stem formed by hollow members 2, 3, each held in contact with adjacent members and angularly adjustable relatively thereto by means of a flexible cord 5, means for tensioning the cord to lock the stem in any position being provided. The ends of the cord have flanges 6 by which they are anchored in cylinders 7, 12 which are axially slidable relatively to the stem, the cylinder 7 being mounted on an eccentric part 10 of a shaft 8 rotated by a handle 9 and situated at an end of the stem secured to a fixed base 1, and the cylinder 12 being mounted in a casing 11 having a cylindrical extension 18. The casing and the cylinder 12 are apertured to receive a locking pin 13 which is apertured coaxially with the extension 18 to receive an arm 19 of the instrument. Under normal tension of the cord 5 the arm 19 and the members 2, 3 are adjustable and rotation of the eccentric moves the cylinders 7, 12 axially of the stem to increase friction between the members 2, 3 and, by interaction of the bevels 14, 15, moves the pin 13 axially to lock the arm 19.
Patent GB-999344-A (GB)
Title: Improvements to impact fuzes for spinning explosive projectiles, and more particularly to base-detonating fuzes of the type equipped with a mechanical auto-destruction device
IPC: F42C9/16
Filed: 1964-01-29
Abstract: 999,344. Ammunition fuzes. BREVETS AERO-MECANIQUES S.A. Jan. 29, 1964 [Feb. 7, 1963], No. 3810/64. Heading F3A. A percussion fuze for rotated projectiles comprising self-destruction means has a casing 1 to be screwed into the base of a projectile, which casing houses a partitioning member 3, 3a through which projects a firing pin 4. The pin 4 has a flanged head 4a which houses locking balls 9 resting against inclined surfaces 10, 11. Before firing the projectile, the pin 4 is held in the retracted position, Fig. 1, by halfrings 6 bearing against the flange 4a, the halfrings being held together by a spirally-wound strip 7 surrounded by a split sleeve 8. On firing the projectile, the centrifugal force due to spin causes the parts 6, 7, 8 to spread outwardly (Fig. 3) and so free the forward path of the pin 4. While the projectile is accelerating, the pin is still held by the balls 9, which due to centrifugal force bear against the surface 10. If impact then occurs the inertia of the firing pin counteracts the centrifugal force and the striker spring 5 drives the pin 4 forward to initiate the fuze. If impact is delayed, the pin 4 moves when the centrifugal force becomes insufficient to counteract the spring 5. To reduce the sensitivity of the fuze to impact against insubstantial objects, so that it remains armed for tripping by a more violent impact, a braking weight 12 is provided, which can slide in the flange 4a. The second bearing surface 11 is formed at the forward end of this weight and when the projectile is fired, the weight is forced rearwardly against the casing 1. On impact the weight 12 thrusts the balls 9 against surface 10 unless centrifugal force has decreased sufficiently for the balls to have moved away from surface 10 and towards the axis, in which case the weight 12 reinforces the effect of the spring 5.