baber/WOPTO huggingface dataset:
Patent GB-802982-A (GB)
Title: Improvements relating to apparatus for protecting the phosphor screen of a cathode-ray tube
Inventor: VAUGHAN-JONES IAN NORMAN
IPC: H04N3/20
Filed: 1955-05-05
Abstract: 802,982. Cathode-ray tube operating circuits. FERRANTI, Ltd. July 31, 1956 [May 5, 1955], No. 13012/55. Class 40 (7). The embodiment of a cathode-ray tube screen protection circuit includes a capacitor 28 between control grid of a projection-type television tube 30 and earth, the tube beam being cut off unless the capacitor carries a charge above a critical value. Positive-going line flyback pulses are applied at 12 and positive-going frame flyback pulses at 20. Assuming that valve 22 is biased to cut-off, the amplified line pulses at screen grid 15 positively charge capacitor 28 via capacitor 24 and brightness control 26, negative pulse peaks being removed by diode 25 (which may be a metal rectifier) and the long time-constant of components 26, 27, 28 affording integration of the charging pulses prevents unwanted modulation of the beam current. When the line time-base is running normally, capacitor 28 has a sustained positive charge sufficient to permit tube beam current to flow. At switching on, capacitor 28, until it is charged to above the critical value, will maintain the beam cut-off. The connection of capacitor 28 to the anode of valve 10 serves to rapidly discharge the capacitor when the line time-base fails and the receiver is in operation; the negative signal at suppressor grid 17 ensures that the anode of valve 10 is cut off from space current when the line time-base is operating normally. With no charging pulses to capacitor 28 the viewer cannot bring the beam on again by manipulation of brightness control 26. The effect of frame pulses is to produce intermittent conduction in valve 22, thus causing a momentary reduction of voltage across resistor 26 but the long-time constant of circuit 26 to 28 prohibits unwanted tube beam modulation. If there are no frame pulses at switching on, valve 22 conducts continuously and the resulting low potential of screen grid 15 prevents charging of capacitor 28 and the tube beam remains cut off; and similarly when the frame time-base fails in operation, in which case beam cut-off is less rapid than when line pulses fail since capacitor 28 takes longer to discharge through resistors 26, 27 than through valve 10. The circuit has certain features of inherent selfprotection and it is preferable for valve 22 to share the cathode of valve 10. The lower end of capacitor 28 may alternatively be connected to H.T. positive; the line and frame pulses may be derived by other than flyback means; and the capacitor may be charged directly by line pulses. Where the cathode-ray tube uses electrostatic deflection an extra stage may be provided to give suitable line pulses from the line time-base.
Patent GB-367245-A (GB)
Title: Improvements in or relating to the supply of a direct current electromagnet from an alternating current source
IPC: H01F7/18
Filed: 1931-05-04
Abstract: 367,245. Rectifying alternating currents. IGRANIC ELECTRIC CO., Ltd., 147, Queen Victoria Street, London.- (Cutler-Hammer Manufacturing Co. ; Milwaukee, Wisconsin, U.S.A.) May 4, 1931, No. 13094. [Class 38 (ii).] In supplying an electromagnet 1 with direct current from an alternating currensource L1, L2, a recti fier 2 is connected in series with the load, and a second rectifier 5 is connected in shunt therewith in such direction as to form an effective shunt path during the half-cycles in which the first rectifier is nonconducting. The rectifiers may be of the thermionic, or dry contact, or electrolytic type.
Patent GB-793777-A (GB)
Title: Improvements in or relating to infra-red radiation transmitters
IPC: G02B23/12
Filed: 1954-05-05
Abstract: 793,777. Semi-conductor devices. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. May 5, 1954 [May 5, I953], No. 13130/54. Class 37. An infra-red emitter device comprises an optical system consisting of a body of semiconductor of one conductivity type with a rectifying contact, which constitutes the source of the radiation, the body being shaped to avoid internal reflections so as to increase the efficiencies of emission. Fig. 2b shows an N-type germanium body with a point contact C and an ohmic electrode E. If reverse current is passed through the point contact, infra-red emission results from the recombination of emitted minority carriers. Point C is at a distance B - from the centre of the part-spherical surface n of the body so that total reflection is avoided. Alternatively the point C may be placed at the centre of the sphere. Other embodiments are described in which the point contact is at the focus of an optical system which involves reflection from one surface of the body and no reflection at the other, such as, for example, a section of a paraboloid (Fig. 3). A PN junction may be used instead of a point contact. The device may be used to provide a modulated infra-red beam for use in a signalling system.
Patent GB-970793-A (GB)
Title: Improvements in or relating to web control means
Inventor: CHRISTENSEN THOGER ESKE
IPC: B65H23/02
Filed: 1962-04-05
Abstract: 970,793. Feeding webs. WITTON-JAMES Ltd. June 6, 1963 [April 5, 1962], No. 13178/62. Heading B6B. A web 6 being fed to a printing-machine passes over a roller 11 on a frame 18 which is pivoted to a limited extent about a vertical axis on a fixed shaft 17 by means of slots 19 in the frame and a block 23 carried on the frame and having a recess 24 presenting a curved bearing surface engaging a correspondingly curved end piece of an arm 26 secured to the shaft. An increase of web tension at the edge 28, for example, results in the frame and roller pivoting clockwise to reduce the web path length at the edge 28 and equalize the tension. The block 23 is adjustable along the frame to position the pivotal axis centrally of the web.
Patent GB-1262399-A (GB)
Title: Improvements in or relating to pin feed devices for paper webs
IPC: G06K13/04
Filed: 1970-03-19
Abstract: 1,262,399. Feeding webs. LAMSON PARAGON Ltd. 19 March, 1970 [17 April, 1969], No. 13180/70. Heading B8R. [Also in Division B6] A flexible endless belt 25 trained about a pair of sprocket-wheels (Fig. 2) has a series of detachable pin-carrying elements 30 clipped on to it. The belt has equally spaced projections 26, and each element 30 has a portion 33 interlocking with a projection. The outward portions of adjacent element 30 abut with each other, and the inward portions are spaced apart so that jamming is prevented when successive elements 30 pass around the sprocket-wheels. Reference has been directed by the Comptroller to Specification 1,216,178.
Patent GB-481700-A (GB)
Title: Improvements relating to a method of salvaging spent printing cylinders and to salvaged cylinders thereby obtained
IPC: B41N1/20
Filed: 1937-05-11
Abstract: 481,700. Reconditioning printing- cylinders. TRIGGS, W. W. (Photo-Cylinder Corporation) May 11, 1937, No. 13360. [Classes 83 (i) and 83 (iv)] A method of salvaging spent printing-cylinders comprises expanding the cylinder to increase the outside diameter and lining the inside wall with cast metal. A spent copper cylinder 10, Fig. 3, is positioned within a die 13 having an internal diameter equal to the original diameter of the printing cylinder, a tapered expanding member 14 is forced into the cylinder to expand it, the internal key 12 being preserved in this operation and afterwards cut at 26, Fig. 4, to form a number of sections 25 which serve to anchor the cast metal lining to the cylinder. The lining, which may be of a relatively cheap metal such as zinc, is cast around a core 19, Fig. 5, in a mould 10, the core being of similar external shape and size as the mandrel on which the cylinder is normally used. A keyway 20 in the core produces a key on the lining similar to the original key 12 and so as to protect the forward end of this key, when the lining metal is relatively soft, a short steel key 27 is embedded in the cast metal lining. The latter may be heated during the casting so that the contraction on cooling increases the bond between cylinder and liner.
Patent GB-134831-A (GB)
IPC: B23D13/00
Abstract: 134,831. Murer, C. Nov. 7, 1918, [Convention date]. Tool-holders for lathes and planing-machines hold the tool with top rake in one of three positions. The tool 8 passes through a slot in a stepped bolt 5 and engages in recesses 12, 3, or 13 in the shank. The axis of the bolt is inclined as shown in the Figs. The front of the holder is cut away forming abutments 9, 10 for the tool in its offset positions. The tool may be used for facing and sliding at one setting or for internal turning.
Patent GB-967094-A (GB)
Title: Power transmission devices
Filed: 1962-04-09
Abstract: 967,094. Selective punching apparatus. CLARY CORPORATION. April 9, 1962 [April 12, 1961], No. 13573/62. Heading B4B. [Also in Division F2] Selective punching apparatus comprises a series of punches 11, Fig. 1, each operable by an osoillatable actuator 13 pivotally connected to the punch and comprising a lever 30 pivotally mounted on a shaft 31 and rotatably supporting an eccentric roller 32 which is arranged to be driven frictionally by two continuouslydriven rollers 34, 35 (or 56, 57), the lever 30 having pivoted thereto a brake pad 62 which normally prevents rotation of the roller 32 but is released when an electromagnet 72, which has its armature 71 operatively connected to the brake pad, is energized. The roller 32 has a V-shaped groove 33, Fig. 3, which is frictionally engageable by spaced resilient flanges 38, 40 on the roller 34 and by a flange 43 on the roller 35. The roller 32 has a disc 42 engageable with a disc 37 on the roller 34. The tape to be punched is fed by a sprocket wheel 25 engaging holes punched in the tape by a punch 12 operable similarly to the punches 11, the sprocket-wheel being advanced intermittently by an actuator 88, Fig. 2, similar to the actuators 13.
Patent GB-1177593-A (GB)
Title: Rotary Piston Machines.
Inventor: LAUER KARL
IPC: F02B53/00
Filed: 1968-03-20
Abstract: 1,177,593. Rotary-piston pumps and motors. K. LAUER. March 20, 1968, No.13582/68. Heading F1F. A rotary-piston pump, or motor, includes a pair of pistons 4, 5 furnished with projections 6, 7 and synchronously coupled both to each other and to a rotary abutment 8 by e.g. toothed gear-wheels (not shown), said abutment being provided with a recess 9 to facilitate passage of the projections and located between inlet and outlet ports 11, 12 for the working fluid, which may be either a liquid or a gas. The pistons operate out of phase with each other, as indicated in the figure, and have a somewhat flattened portion on either side of each projection so as to ensure sufficient space for the working fluid, the latter being allowed to pass on either side of whichever of the two pistons has its projection 7, or 8, adjacent the abutment. The recess 9 has sufficient depth to permit a substantial flow of fluid therethrough while one or other of the projections is situated therein. It is indicated that two or more pumps, or motors, may be connected in parallel.
Patent GB-763504-A (GB)
Title: Improvements in or relating to containers such as lockers or cupboards
IPC: A47B87/02
Filed: 1954-05-10
Abstract: 763,504. Cabinets &c. BAWN & CO., Ltd., W. B., and GREEN, G. I. May 10, 1955 [May 10, 1954], No. 13611/54. Class 52 (1). Each stackable locker &c. has headed studs 9 on its top or bottom and keyhole slots 15 on its bottom or top, the slots being elbowed preferably at 90 degrees. The sides of the locker have studs 18 and keyhole slots 19 to allow side by side connection of like lockers. The studs may be axially slidable in the locker or rigid therewith.
Patent GB-154949-A (GB)
Title: Improvements in baling presses
IPC: B30B9/30
Filed: 1919-05-30
Abstract: 154,949. Cook, T. May 30, 1919. Baling-presses. - Consists of an improved baling-press having means for controlling the downward movement of the platen and for controlling the movement of the strap-fork rod. The body of the press is built on steel bars a and beams b, and the framework is covered in where required by sheets c leaving openings adapted to be closed by hinged doors e. The platen d has arms passing through slots in the frame, the arms being adjustably connected to wire cables i passing round guide pulleys j, k to fuze drums n on a sha.ft o so that the pressure is increased as the platen rises. The shaft o is driven by reduction gearing from a shaft s carrying fast and loose pulleys t, u and a brake drum v. This drum v co-acts with a pivoted shoe 2 which bears against the drum to stop the shaft when the platen reaches the bottom of the frame, when it engages the end 4 of a lever 5 to move the shoe 2. To stop the platen when the desired upward stroke has been made, it engages with the bent end of a second lever connected to a shaft 10 carrying a catch 12 engaging a recess 13 in the strap-fork rod 9 to hold the fork 14 opposite the fast pulley t against the action of a spring 15. When the platen engages the lever it releases the catch and the spring 15 then moves the fork opposite the loose pulley u. The catch 12 then engages a notch 21 in a boss on the rod 9, and the press can only be restarted by lifting the catch and pushing the rod 9 back by its handle 20.
Patent GB-495419-A (GB)
Title: Improvements relating to propelling pencils
IPC: B43K21/08
Filed: 1937-05-14
Abstract: 495,419. Pencil holders. MENTMORE MANUFACTURING CO., Ltd., and ANDREWS, A. E. May 14, 1937, No. 13721. [Class 146 (iii)] A propelling-pencil is formec with a transparent barrel section and with an indicator associated with the propelling - mechanism which becomes visible through the transparent section of the barrel when the lead needs replacement. As shown, the section 6, of glass or transparent composition material, is interposed between the end of the barrel 1 and the point-section 2, being prefer. ably attached to the section 2 so that it can be unscrewed therewith to facilitate removal of the refills. These are accommodated in recesses formed between the wall of the barrel and. a star-shaped insert 3, one of the interior recesses of the insert serving as a guide for the projection 17 on the propeller 12 which passes through the helical slot of the rotatable member 14. A part of the wall of the recess housing the projection 17 is cut away at the lower end to expose the projection and indicate when the lead is nearly exhausted. The projection is preferably formed with a coloured portion 16 of less height so that it will not scrape on the wall of the insert.
Patent GB-820670-A (GB)
Title: Desheathing of uranium fuel rods
IPC: G21C19/38
Filed: 1957-04-30
Abstract: 820,670. Treatment of nuclear fuel. ATOMIC ENERGY OF CANADA Ltd. April 30, 1957 [May 9, 1956], No. 13747/57. Class 39(4). Uranium fuel rods sheathed in zirconium or an alloy thereof are scored to expose the uranium and then treated with steam at a temperature not less than 250‹C. to oxidize the uranium so that the sheath may be removed bodily. The steam is preferably used under pressure at a temperature of 340‹-380‹C.
Patent GB-927728-A (GB)
Title: Improvements in or relating to nuclear reactor fuel elements
Inventor: GASKELL BRIAN VERNON
IPC: G21C5/20
Filed: 1961-04-17
Abstract: 927,728. Fuel elements. UNITED KING- DOM ATOMIC ENERGY AUTHORITY. March 29, 1962 [April 17, 1961], No. 13759/61. Addition to 904,438. Class 39 (4). The neutron flux near the ends of a nuclear fuel element is reduced by substituting fertile for fissile material at the ends. A cylindrical fuel member 3 is closed by flush-fitting plugs 4 and enclosed by a finned protective sheath 5, the fuel member 3 being of natural or enriched uranium whilst the plugs 4 are of uranium depleted in the isotope 235. Interposed between the closed ends of the fuel members 3 and end caps 7 edge-welded at 8 to the sheath 5 are discs 9 of insulating material, e.g. a ceramic such as magnesium oxide, to prevent overheating of the end caps 7. Each plug 4 has two circumferential V-ribs which are an interference fit in the bore of the fuel member 3, the plugs 4 being forced into position so that their outer ends are flush with the ends of the fuel member 3 to which they are edge-welded at 16.
Patent GB-838035-A (GB)
Title: Polishing hard crystalline carbon
IPC: B24B29/00
Filed: 1958-04-30
Abstract: A diamond is polished by heating to a temperature of 1500-3000 DEG C. under non-oxidizing conditions and then continuing the heating under oxidizing conditions.  Heating under non-oxidizing and oxidizing conditions may be effected by direct contact with an oxy-acetylene flame.  The diamond may be heated in a crucible and the crucible may be vibrated during heating.  The diamond is preferably quenched in water after heating.  In an automatic process a given volume of diamonds is fed periodically into each of a plurality of crucibles, an oxyacetylene flame is directed into the mouth of each crucible, first under reducing conditions and then under oxidizing conditions, the flames are then removed, and the crucibles tipped so as to discharge the diamonds into a quenching liquid.  The diamonds may be mechanically rounded according to the method of Specification 515,023 before polishing.
Patent GB-1020541-A (GB)
Title: Apparatus for use in acceleration control of a gas turbine engine
Inventor: BOTTOMS CHARLES HERBERT
IPC: F02C9/32
Filed: 1961-04-18
Abstract: 1,020,541. Gas turbine plant. JOSEPH LUCAS (INDUSTRIES) Ltd. May 23, 1962 [April 18, 1961], No. 13906/61. Heading FIG. [Also in Division G3] An acceleration control for gas turbine engine of the kind in which the flow of fuel to the engine is governed in part in accordance with a control pressure Pc which is a function of the compressor inlet and outlet pressures P1, P2, and is generated by a mechanism in accordance with a schedule dependant on the particular engine with which the control is employed comprises means for producing a control pressure proportional to P1 when the ratio P2/P1 is below a predetermined value and proportional to P2 when the ratio exceeds the predetermined value. The pressures P1 and P2 are applied to bellows 22, 24 working in conjunction with evacuated bellows 21, 23 at opposite ends of a lever 20 secured to a bellows 30 and carrying a control valve 27. When the engine starts, pressure from the downstream side of the fuel pump 6 is transmitted through a conduit 29 to the bellows 30 to move the lever 20 towards fixed pivots 25, 26 so that when the value of P2/P1 is below the ratio of the lengths of the lever 30 between the bellows 30 and the bellows 22, 24 the lever will engage the pivot 25 while when the value is above the ratio it will engage the pivot 26. The conduit 29 also connects the bellows 30 with the valve 27 and with a bellows 36 controlling a further valve 35 for regulating the main fuel valve 7 which is also controlled in known manner by a governor 8 and a balancing valve 11. The valves 27 and 35 are mounted in casings 18, 19 subjected to the pressure at the fuel pump intake. In a modification the main fuel valve is directly controlled by the valve 27, the valve 35 and bellows 36 being omitted.
Patent GB-528593-A (GB)
Title: Improvements in or relating to rotary bits for rock and like drilling
IPC: E21B10/54
Filed: 1939-05-10
Abstract: 528,593. Drills. JESSOP & SONS, Ltd., W., and LAMBERT, J. G. May 10, 1939, Nos. 13919 and 25067. [Class 83 (iii)] A rotary drill bit for rock, coal &c. of the kind having two or more blades separated by a U-shaped gap, has a face or faces in the gaps remote from the cutting edges and inclined to the axis of the bit so as to engage the core or cores and break them into pieces by a transverse or side-ways pressure. In one form the bit has wings 3 tipped at 8 with tungsten carbide &c. and the central part has an inclined face 5 for breaking away the core 6 left by the wings. The face 5 is preferably inclined at 45 degrees to the axis of the bit and instead of being formed on the body it may be formed on a separate piece located by flats &c. on the body and having a stem entering a hole therein. In a modified construction, the body 1, Figs. 8 and 11, has inner wings 3 and outer wings 9, the central core 6 being broken periodically by the inclined surface 5 and the annular core 12 being broken by a member 11 on the body 1. The outer wings 9 and member 11 may be formed integral with the body 1 or may constitute a separate unit on a base 13 having a central aperture to receive the stem 2 of the body and a transverse slot 14 to engage a rib on the body. The member 11 may be formed as a stud mounted in a hole in the base 13.
Patent GB-290303-A (GB)
Title: Improvements in or relating to transmitters for use in wireless signalling
IPC: H04L27/04
Filed: 1928-05-12
Abstract: 290,303. Binard, E., (Assignee of Soc. Belge Radio-Electrique). May 12, 1927, [Con. vention date]. Thermionic generators; thermionic modulating systems.-A constant load on the supply source of a generating-valve is obtained by the provision of an auxiliary source of potential adapted to render the valve conductive during the periods when it is not oscillating. The Figure shows a valve 1 having tuned grid and anode circuits 2, 3 and a potentiometer 8 for adjusting the gridbias potential. Keying is effected by shortcircuiting one or more turns of an inductance coil coupled to the grid circuit.
Patent GB-116992-A (GB)
Title: Improvements in or relating to Sparking-plugs.
Inventor: WILLCOCKS MICHAEL JOHN
IPC: H01T13/16
Filed: 1917-09-29
Abstract: 116,992. Willcocks, M. J. Sept. 29, 1917. Sparking-plugs.-In an air-cooled sparking-plug, an annular chamber a in the sparking end of the plug is formed by the outer wall b<1> of the plug and an unperforated sleeve c, which makes a. gastight joint with the shoulder b<2> and the sparking end b<4>, and encloses the insulator d. The chamber a is provided with inlet and outlet passages a<1>, a<2> between the shoulder b<2> and the surface of the cylinder, and the inlet a<1> may be fitted with a funnel c facing the direction of motion, or connected to a fan or blower. In the form shown in Figs. 1 and 4, the sleeve c is stepped and provided with external gills, and the end c<2> is screwed and spun over the end b<4> of the plug. A baffleplate a<3> divides the annular chamber a into inlet and outlet portions. In modifications, the inner wall of the chamber a is formed by a plain sleeve, turned over at each end or integral at one end with the metal body of the plug and turned over at the other end. In a further modification, Fig. 11, the annular chamber is replaced by passages a<4>, a<6> drilled in the plug and closed at their inner, ends by plugs a<5>.
Patent GB-684866-A (GB)
Title: Improvements in or relating to pistons for internal combustion engines
IPC: F02F3/04
Filed: 1950-06-06
Abstract: 684,866. Pistons. SCHMIDT, GES., K. June 6, 1950 [Oct. 1, 1948], No. 14158/50.. Class 122(i) In a light metal piston for internal combustion engines, of oval cross section with the crown a and skirt b thereof separated by transverse slots c, and in which control members in the form of one or more rings f having a lower coefficient of expansion than the piston are inset in the upper part of the skirt, the rings are closed, flat, of constant thickness around their periphery and firmly anchored to the skirt of the piston, so that heating of the. piston causes expansion of the rings along the axis of the gudgeon pin and draws in the pressure and counterpressure sides of the skirt causing the cross-section of the piston to approach circular form. Projections on the outer edges of the rings anchor them to the skirt of the piston, the inner edges being free.