baber/WOPTO huggingface dataset:
Patent GB-1152721-A (GB)
Title: Improvements in or relating to Magnetic Transducer Heads.
Inventor: CAMRAS MARVIN
IPC: G11B5/465
Filed: 1966-05-02
Abstract: 1,152,721. Magnetic head. IIT RESEARCH INSTITUTE. 2 May, 1966, No. 19262/66. Heading G5R. In a magnetic head including a main or working core 10, an auxiliary core 20 is provided adjacent the main core for diverting residual flux produced by residual magnetism in the main core away from the head gap. A shunt return path is provided for the flux by the auxiliary core which is of low coercive force material. The auxiliary core may be separate from the working core 10 with the space therebetween 30 filled with a non-hardening material, e.g. silicon grease, or the auxiliary core 76, 77, Fig. 2C, may be integral with the working core 10c or the auxiliary core, Fig. 2A, may be formed of both separate 20a and integral 70a, 71a parts. The head may be supported in a pair of mounting blocks 241, 242, Fig. 6, of non- magnetic, electrically conducting material each of which is recessed to provide cavities 241b, 242b, which receive the toroidal head winding 275 and cavities 241a, 242a (not shown) in which the core halves are received and bonded. A keeper housing 260 is secured to the mounting blocks. Cross-field windings may be mounted on each pole tip, Figs. 8-10 (not shown), and one of the pole tips may be spaced from the tape path by a non-magnetic spacer, Fig. 11 (not shown).
Patent GB-653580-A (GB)
Title: Improvements in and relating to photographic contact printing apparatus
IPC: G03B27/22
Filed: 1948-07-20
Abstract: 653,580. Photographic contact printer. HALDEN & CO., Ltd., J., and HOLDEN, J. July 20, 1948, No. 19385. [Class 98 (ii)] The printer comprises an enclosed frame, a light source disposed in the frame below a horizontally arranged diffusion plate, an outwardly convex partly cylindrical transparent or translucent support for the light - sensitive material and the material to be copied mounted on the frame above the diffusion plate and a rigid pressure cover of the same shape and size as the convex support and disposed thereabove, the pressure cover being hinged on a support attached to one side of the frame so that it may be lifted up to permit the lightsensitive material and the material to be copied to be positioned on the convex support and to be removed therefrom. The printer shown comprises a frame 3 having louvred end walls 5 and enclosing therein a light source (not shown). Mounted on the frame above the light source is a diffusing plate 4 and movable along rails 6, which extend out of the frame at one end and are supported at 7, is a carriage 8, the top of which forms the convex support. The pressure cover 10 is of the same length as the frame and is hinged at 10a to a member 11 attached to the frame. The other edge of the pressure member is also engageable with a member 11, the members 11 being such that they can lower the cover 10 on to the material carried by the support. In use, with the pressure cover in its open position, the carriage 6 is moved into the rail extension and is loaded. The pressure cover is now lowered to the position shown in Fig. 2 and the carriage is moved thereunder. When the carriage has moved into place it engages a catch which causes members 11 to lower the cover 10 and at the same time switches on the light source. After exposure, the members 11 are operated by a switch (not shown), to lift the cover 10 and at the same time the light source is switched off.
Patent GB-147617-A (GB)
Title: Improvements in and relating to electron discharge devices
IPC: H01J21/06
Filed: 1920-07-08
Abstract: 147,617. British Thomson - Houston Co., (Assignees of White, W. C.). March 20, 1914, [Convention date]. Void [Published under Sect. 91 of the Act]. Vacuum tubes; low-pressure metallic-vapour apparatus.-In a vacuum tube having an incandescent cathode, a grid, and an anode, and exhausted to such a degree that current conduction takes place by pure electron discharge, means are provided for maintaining in the tube a gas or vapour at a constant pressure too low for ionization. It is stated that with a positive potential of 1.2 volts appiied to the grid, a sudden decrease of conductivity occurs when the grid potential is increased or decreased, for instance by superposed oscillations. The vapour may be that of sulphur, phosphorus pentoxide, or tungsten hexachloride. Mercury may be used if placed in a cool side chamber, or converted into an amalgam. In the tube shown in Fig. 1, a V-shaped tungsten filament cathode 2 is mounted in a frame 7, around which wire 9 is wound to form a grid. Glass disks 5 may be provided on the cathode supports to prevent short-circuiting by a deposit of metal. The anode may be in the form of a tungsten, tantalum, &c. wire 3 strung on hooks on a forked frame 11. Exhaustion may be effected by a Gaede pump: chemical absorbents such as vaporized calcium or magnesium may be used. During exhaustion. the tube is heated and the cathode and anode may be brought to incandescence by the passage of current, and an increasing potential is applied to the grid as the gas is removed. The vaporizable material 17 is placed in the tube or in a side chamber after the envelope is sealed off. In order to convert mercury into an amalgam, silver or other metal is placed in the tube, and mercury in a pocket which is kept cool until after exhaustion, when it is slightly warmed. After one or two days, the silver is sufficiently amalgamated by the vapour, and excess of mercury is then removed from the tube by heating the tube while strongly cooling the pocket, which is subsequently sealed off. In the case of mercury, the vapour pressure should be between the limits of 0.00006 to 0.0004 millimetres of mercury, and for sulphur 0.0002 to 0.003 millimetres of mercury. A potential of 300 to 400 volts may be applied between the anode and cathode without causing positive ionization. The tube may be used as a rectifier, amplifier, or relay in wireless systems. In the arrangement shown in Fig. 5, the anode circuit of one tube 32 is coupled with the grid circuit of another tube 39 through a resistance 40; or the resistance may be replaced by an air-core transformer.
Patent GB-1160840-A (GB)
Title: Improvements in Release Mechanisms in Prime Movers
IPC: F01D21/18
Filed: 1968-04-25
Abstract: 1,160,840. Engine stop gear. STAL LAVAL TURBIN A.B. April 25, 1968 [June 30, 1967], No.19613/68. Heading F1K. When the turbine overspeeds or when the functioning of the overspeed governor is being tested at normal r.p.m. the plunger is urged from its rest position by centrifugal force or pressure medium and engages the pawl 5 which then swings about its pivot 6 and is released from the piston rod 12. The piston of the release valve 13 is moved by a spring to the right hand end of the cylinder. If the plunger has been released because of overspeeding of the turbine the branch line 14 and the servomotor are drained through the outlet 18 and the turbine is caused to stop since the governing oil pressure drops 6 on the other hand if the plunger has been released by the function test arrangement, subsequent to adjusting the by-pass valve 16 the oil is passed from the branch line 14 over the valve, the throttle line 17 and the release valve 13 to the pressure governor 15. The governing oil pressure is maintained and the turbine continues to function without disturbance during the test.
Patent GB-836014-A (GB)
Title: High pressure expansion joints
Inventor: FENTRESS DAVID WENDELL
IPC: F16L51/02
Filed: 1956-06-25
Abstract: 836,014. Corrugating; jointing by stamping. FLEXONICS CORPORATION. June 25, 1956, No. 19625/56. Class 83 (4). [Also in Group XXVIII] In manufacturing an expansion joint (see also Group XXVIII) the corrugations may be formed by the means shown in Fig. 3. Opposed heads 74, 76 are arranged to grip the opposite ends of the tubing 14. The corrugations are formed by applying internal hydraulic pressure and simultaneous axial collapsing pressure to the tube. Fig. 5 shows corrugations of modified shape. If in shaping the tubing an initial stretch or working of the metal is effected in the portions 90 of the tubing wall these portions are thereby stiffened so that in subsequent shaping of the tubing they will assume a curvature of greater radius than other tubing wall portions.
Patent GB-385997-A (GB)
Title: Improvements relating to radio receiving apparatus
IPC: H03G3/22
Filed: 1931-07-08
Abstract: 385,997. Valve circuits for wireless reception. TOMLINSON, A. V., 65, Victoria Street, London.-(Union Switch & Signal Co.; Swiss vale, Pennsylvania, U.S.A.) July 8, 1931, No. 19647. [Class 40 (v).] A detector of the dry-surface contact type as described in Specification 381,206 is followed by one or more valves 4 which amplify the rectified high-frequency currents, which are subsequently eliminated by a byepass condenser 11 or other means. The detector is fed from a high-frequency valve 3a, the grid-bias of which is automatically controlled from the output of the valve 4 by a resistance 13 and condenser 16. Grid-bias for the output valve 4 is obtained from a resistance 12 shunted by a condenser 12a. According to modifications, the detector, valve 4, resistance 12 and condenser 12a are incorporated in a unit to plug in the socket of the detecting-valve in an ordinary circuit, Fig. 3 (not shown) ; the detecting-elements la, 1b are connected up for fullwave rectification and are followed by a single output valve, which may be a pentode, Fig. 4 (not shown), or a triode of large power capacity, Fig. 5 (not shown). Specification 385,998 is also referred to.
Patent GB-1344187-A (GB)
Title: Electrically-operated low lift truck raising and lowering lankage
IPC: B62B3/065
Filed: 1971-06-09
Abstract: 1344187 Low-lift trucks ALLIS-CHALMERS MFG CO 9 June 1971 [10 June 1970] 19647/71 Heading B8H An electrically-operated low lift truck comprises a main frame 11 at whose rear an electric storage battery 49 is mounted on a support wall 48, an elevatable platform 21 being connected to the frame 11 by means of two pivotally mounted upper links 22, (23), Fig. 2 (not shown), extending between a bracket 31 on the frame 11  and an upstanding part of the platform 21, and two interconnected lower links 27, (28), pivotally mounted at axes 42, 56 to the frame 11 and platform 21 respectively, the links 27, (28), being further connected at an axis 76 to rods 73, (74), which extend beneath the platform 21 and are pivotally connected to wheel support arms 71, (72), which in turn are pivotally connected to the platform 21 at an axis 79. Elevation of the platform 21 is accomplished by means of an hydraulic jack 62 whose rod 61 is connected to an arm 59 which forms an extension of the link 27. On expansion of the jack 62 the rod 61 moves downwardly causing the interconnected links 27, (28), to pivot in unison in a counterclockwise direction about the axis 42 thus causing the front end of the platform 21 to be raised because of the connection of the links 27, (28), at the axis 56 to the said platform, and, because of the further pivotal connection of the said links with the rods 73, (74), at the axis 76, the wheel support arms 71, (72), are caused to rotate in a clockwise direction about the common axis of the rear wheels thus raising the axis 79 and thus the rear end of the said platform. When the jack 62 is retracted the lowering of the platform 21 is assisted by a tension spring 75 connected between the link 22 and frame 11.
Patent GB-1042795-A (GB)
Title: Device for picking up, elevating and feeding mown crop into a harvester
IPC: A01D41/10
Filed: 1964-05-12
Abstract: 1,042,795. Threshing machines. SMEDERIJ -EN GARAGEBEDRIJF G. W. VAN DRIEL N.V. May 12, 1964 [July 29, 1963], No. 19661/64. Heading A1F. A device for picking-up and feeding mown crop into a threshing machine comprises a belt conveyer 4 of which one end is suported on the ground and the other is hingedly attached to the threshing machine, the belt conveyer being followed by a feeding drum 5 which passes the crop into the entry-throat 2 of the machine, the belt-conveyer, in plan view, extending obliquely to the direction of travel of the machine, so that the crop is picked up towards the side of the machine and is fed into the centrally-located throat. In order to turn the crop-stream as it enters the throat, the drum 5 is conical. The beltconveyer is wider than the throat 2 and the drum 5 caries an auger-flight 7 to compress the crop-stream laterally. The free end of the conveyer runs on wheels 3.
Patent GB-901764-A (GB)
Title: Improvements in or relating to electronic timepieces
IPC: G04C3/06
Filed: 1959-06-09
Abstract: 901,764. Clocks and watches. FABRIQUES DES MONTRES ZENITH S.A. June 9, 1959 [April 10, 1959], No. 19665/59. Class 139. The balance maintaining circuit of an electric timepiece comprises coaxial pick-up and driving coils 8, 9 which co-operate with a permanent magnet 2 carried by the balance rim and which are connected respectively to the input and output of a transistor amplifier 10. As the magnet 2 moves between the coils 8, 9 its axis momentarily coincides with the common axis of the coils. The balance has a counterweight 3 and the gear train 7, 6 is driven by the pallet member 5. The transistor circuit may be temperature compensated.
Patent GB-205221-A (GB)
Title: Improvements in or relating to perforated bricks or gratings used for ventilating buildings and other purposes
IPC: E04B1/70
Filed: 1922-07-18
Abstract: 205,221. Carter, G. H. S. July 18, 1922. Ventilators for buildings consist of bricks which have a recess d with one or more inclined portions k either formed integrally with the brick, as in Fig. 4, or consisting of detachable plates n, as in Fig. 9, and rows of perforations i, j are formed in the outer face. The brick is of clay, earthenware or metal.
Patent GB-275022-A (GB)
Title: Improvements connected with smoke burning arrangements for the fire-bridges of steam generator and like furnaces
IPC: F23M3/00
Filed: 1926-08-10
Abstract: 275,022. Mills & Co. (Engineers), Ltd., J., and Ramsbottom, E. Aug. 10. 1926. Firebridges.-An air heating device arranged within a brick-work structure b<1>,< >b<2>, b<3> at the rear of a firebridge b comprises plates c threaded and spaced on rods d<1> suspended between angle-iron bearers d which rest upon the fire-brick courses b<2>. The assembly of plates is closed on the top surface, open at the rear, and at the front communicates with a space below the bridge-plate a to which air from beneath the grate is admitted through a valve a<3> operated by a shaft a<4> and handle a<5>. The bearers d extend backwards over the fire-brick course b<3> and form the side walls of a delivery conduit d<2> for the heated air, closed at the top by a plate d<3> permanently or removably secured. The air valve a<3> is either kept open or opened at intervals after firing, the plate structure being re-heated and rendered incandescent during the time the air valve is closed. The plates c may be corrugated.
Patent GB-1215424-A (GB)
Title: Vehicle
Inventor: LINDBLAD LENNART
IPC: B60G11/14
Filed: 1969-04-17
Abstract: 1,215,424. Vehicle safety harness. L. LINDBLAD. 17 April, 1969 [24 April, 1968], No. 19706/69. Heading A3V. A vehicle includes a safety belt 3, one of the mountings of which is located on a mounting member 6 connected to a door 7 of the vehicle and movable relative thereto, and has means 10 for changing the position of the mounting member 6 relative to the door 7 as a function of the extent to which the door is opened in order to facilitate leaving and entering the vehicle. Mounting member 6 is slidably connected to one end of bell crank lever 10 by a belt 19 passing through an oblique slot 20 in the door; lever 10 is pivotally mounted within the door at 13, and is connected to the door frame by a flexible tension strip 14 which urges arm 11 of the lever towards an upright position when the door 7 is opened. When the door is closed, arm 11 pivots downwardly, aided by a spring, by weights, manually or by a motor (not shown), to a lower position shown dotted in Fig. 1, where it is held by a catch 24 when the door is closed. Catch 24 is operated by a spring loaded bolt 28 which is movable on contact with the door frame; arm 11 thus remains in its lower position while the door is closed, and belt 3 holds a wearer in the seat 1. The locking mechanism may also be mounted on the vehicle frame or chassis, and may additionally or alternatively be operated by the door handle. Belt 3 is anchored at one end to the seat 1 or to the vehicle floor or chassis, and at the other end to a reel 8 within the seat back 9. Reel 8 may be of an inertia type, and may have a spring or motor (not shown) to wind the belt in. In a further embodiment, Fig. 5 (not shown), lever 10 is replaced by a spring loaded tackle (32) and rope (38) which pulls mounting member 6 to its upper position when door 7 is opened.
Patent GB-1097447-A (GB)
Title: Photoconductive device
IPC: H01J29/45
Filed: 1965-05-10
Abstract: 1,097,447. Photo-conductive device. RADIO CORPORATION OF AMERICA. May 10, 1965 [May 28, 1964], No. 19727/65. Headings H1D and H1K. In a photo-conductive device having a vitreous layer of photo-conductive material which tends to crystallize, the layer is coated with a layer of material which is transparent to all visible light and which mechanically engages the photo-conductive material and restrains crystal growth therein. In an embodiment, as shown, a vidicon tube comprises a glass envelope 14 having a glass faceplate 16, the plate being sealed using an indium ring 18 and clamping ring 20. A mesh screen 22 is provided across the end of a tubular focusing electrode 24. The target 12 comprises a signal electrode 26 of SnO which is transparent and conducting, a vitreous layer 30 of Se and two stabilizing layers 28 and 32, the layer 32 being insulated from the ring 18. The vitreous Se layer may contain up to 25 weight per cent Te and 3 weight per cent As or Sb. The stabilizing layer may comprise Au, Ag, Cu, Rh, Pd, Ge, Ge oxide, Ga, Ga oxide, In, Sb, Sb sulphide or oxide. Some of these materials are not suitable for layer 28 due to lateral conductivity. Only one stabilizing layer may be used. The preferred thickness of each layer is specified. It is stated that no chemical reaction takes place between the layers.
Patent GB-1369992-A (GB)
Title: Packages
IPC: A24F25/02
Filed: 1972-05-17
Abstract: 1369992 Packages BRITISH-AMERICAN TOBACCO CO Ltd 17 May 1972 [9 June 1971] 19728/71 Heading B8C The relative humidity within a package, for example of tobacco, is maintained substantially constant by the inclusion within the package of an absorbent body containing a saturated aqueous solution of a metal or ammonium salt of an inorganic or organic acid, or a mixture thereof, with sufficient excess salt to maintain the humidity. A packet 1 of cigarettes 2 includes a sachet 4 of heat-sealed thermoplastics containing paper 8 treated with the salt solution. Larger sachets may be included in large cartons of multiple packets of cigarettes. Thermoplastics such as nylon polystyrene, cellulose acetate may be used.  A tobacco pouch 12 with a peelable seal 18 and flap 19 comprises an outer layer of low water-vapour permeability polypropylene, an inner layer of high water-vapour permeability polystyrene, and a salt impregnated sheet 15 between them.
Patent GB-1101007-A (GB)
Title: Injection moulds and plastics tumblers produced therewith
IPC: B22D35/04
Filed: 1965-05-11
Abstract: 1,101,007. Injection moulds. MASCHINEN FABRIK & GIESSEREI NETSTAL A.G. 11 May, 1965 [11 May, 1964; 5 Feb., 1965], No. 19870/65. Heading B5A. [Also in Division A4] Plastics containers, in particular drinking cups, are produced by using an injection mould comprising a female part 1, having a frustoconical, cylindrical or spherically surfaced protuberance 5 and a male part 2, located on part 1 by an annulus 2b, and having a recess 6 which substantially corresponds to the protuberance 5. Thermoplastics moulding material is injected through aperture 4, and according to the invention, an excess pressure developing at X, say, causes gap Z to narrow and gap P to widen, so that more material flows to point Y thereby equalizing the pressures. This action generally ensures that during the moulding process the wall of the container is of uniform thickness. The container may be longitudinally ribbed, Fig. 2 (not shown), ribs (14) being of semi-circular, trapezoidal or triangular cross-section and preferably out-standing from wall (13) by a distance equal to the thickness of the wall. Alternatively, the ribs may extend over part only of the height of the container, or be at an angle to the longitudinal axis of the container or run peripherally thereof.
Patent GB-597691-A (GB)
Title: Improvements in or relating to firing mechanism for automatic guns
IPC: F41A19/59
Filed: 1944-10-14
Abstract: 597,691. Automatic guns. DUNLOP RUBBER CO., Ltd., and TREVASKIS, H. W. Oct. 14, 1944, No. 19871. [Class 92 (ii)] The sear 8 of an automatic gun of the Hispano type is operated by a straight triggerlever 12 pivoted at one end and bearing directly on the sear at the other end, the intermediate portion being connected to the core 11 of a solenoid movable at right angles to the trigger-lever. As shown, a readily-detachable solenoid firing-device of flat compact form is attached to the gun casing in the vicinity of the pivoted sear 8. The solenoid comprises circular top and bottom plates 9a, 9b enclosing the winding 10 and moving core 11. The trigger-lever 12 is mounted to rock on a pivot on a fixed part 13a and is pivoted at 13 to the core 11, the free end bearing on the extension 8a of the sear. The electric leads from the remote firing position enter by a plug inserted in a two-pin socket 22, a catch 23a preventing withdrawal. On pressing the firing button, the core is attracted and the sear is released, a pin 20 operating a switch-plate 17a to introduce a resistance into the firing circuit to reduce the current consumed whilst the gun is firing. The resistance is normally short-circuited by the switch-plate to give the full current for firing. The solenoid unit is attached to the base plate 7 and shoulder 31 on the gun by a wedge member 30 operated by a screwed spring-pressed sleeve 24.
Patent GB-365012-A (GB)
Title: Improvements in fire-proofing agents
IPC: D06M11/71
Filed: 1931-07-10
Abstract: 365,012. Fireproofing. I. G. FARBENINDUSTRIE AKT. - GES., Frankfort-on- Main, Germany. July 10, 1931, No. 19899. Convention date, July 10, 1930. [Class 140.] A fireproofing agent for wood, paper, and textiles comprises an ammonium halide, for example ammonium chloride or bromide, a salt of an aromatic sulphonic acid benzylated in the nucleus, for example sodium benzylnaphthalenesulphonate, and boric acid or phosphorous acid or a water-soluble borate or phosphite, for example borax and ammonium borate. Magnesium or calcium chlorides and fungicides such as sodium cresolate, sodium fluoride, potassium dinitrocresolate, salicylic acid and magnesium trichlorphenolate may be used. Specification 326,253, [Class 140, Waterproof &c. fabrics], is referred to.