baber/WOPTO huggingface dataset:
Patent GB-1502256-A (GB)
Title: Optical data storage systems
IPC: G11C13/04
Filed: 1973-02-14
Abstract: 1502256 Holographic data storage system SIEMENS AG 14 Feb 1973 [24 March 1972] 7327/73 Headings G2A and G2J In a coded optical data storage system, a pulsekeyed light beam 1 is incident upon a modulator 2, electrodes 3 of which provide for the data that is to be stored to be modulated on to the light beam. The pulse amplitude modulated light beam passes through a uni-dimensional hologram 9 to fall upon a photo-sensitive tape 10. The hologram is transferred to the tape 10 either by a reproducing optical system or by contact-printing. Corrective illumination is effected by means of a beam-splitter 4 which diverts a portion of the light beam from the modulator 2 to a photo-detector 5, which in turn supplies a signal via a control unit 6 to a light source 7, this supplying a correcting light beam to the tape 10. The sum of the signal illumination and the corrective illumination is substantially constant for each hologram recording. The coding is carried out by time-modulating the corrective illumination by an intensity noise component, and for this purpose a noise generator 8 is provided whose noise signals are applied to the light source 7. The contrast of the holograms recorded upon the tape 10 is thus statistically varied and reconstruction of the stored coded data cannot be performed without knowledge of the noise signal. Alternatively, it is the signal illumination and not the corrective illumination which is modulated by the noise generator. Preferably the noise signal is simultaneously recorded upon a second photosensitive storage tape. In one arrangement for reading-out the stored coded data, shown in Fig. 3, both the coded data storage tape 14 and the noise tape 19 are illuminated by quasi-coherent light beams 13, 18 which, after penetrating the tapes, are incident upon detectors 15, 20, the signal from detector 15 being applied to an amplifier 16 while that from detector 20 is applied via an amplifier 21 to a control unit 22 producing an output signal suitable to be mixed with the output from the amplifier 16 and applied to a common filter 17 which filters out the noise signal so that at the output of filter 17 the original, decoded signal appears. In order to ensure synchronization of the signal and noise tapes at read-out, both tapes may have a timing pulse train recorded on them.
Patent GB-954948-A (GB)
Title: Rods for flame-spraying
IPC: B05B7/18
Filed: 1962-02-26
Abstract: Improved, bonded, sintered rods of refractory material have a fluted cross-section.  The fluting preferably takes the form of 8 peripherally spaced, trapezoidal-shaped longitudinally disposed grooves.  The rods preferably have an outer diameter of 3/16 of an inch and grooves having a depth of 1/32 of an inch. Fluted zirconia or alumina rods are made by mixing coarse gram oxide with a temporary binder, extruding the mixture to form a fluted rod and forming the rod to sinter the particles and drive off the binder; the rods have a porosity of from 8-40% of open and connecting pores and contain 96% and 95% by weight of zirconia and aluminia respectively. Specifications 745,259, 745,275, 833,107 and 852,484 are referred to.ALSO:Bonded, sintered rods of refractory material which are used in the process for coating articles by flame spraying have a fluted cross-section.  The fluting preferably takes the form of eight peripherally spaced, trapezoidal-shaped longitudinally disposed grooves.  The rods preferably have an outer diameter of 3/16 of an inch and grooves having a depth of 1/32 of an inch.  The method of flame spraying is described in Specification 745,275.  Specifications 745,259, 833,107 and 852,484 also are referred to.
Patent GB-953006-A (GB)
Title: Improvements in electro-optical systems for record tape sensing
IPC: G06K7/10
Filed: 1961-02-28
Abstract: 953,006. Sensing record tapes. SOC. D'ELECTRONIQUE ET D'AUTOMATISME. Feb. 28, 1961 [March 2, 1960], No.7357/61. Heading G4M. In a photo-electric record tape sensing apparatus a threshold level for the data and sprockethole signals is obtained by transmitting light through an unperforated part of the tape. As shown in Fig. 2 the tape 10 is fed by roller 13 over an apertured plate 15 and kept flat by guide 14. Light from a lamp 18 passes through an unperforated part of the tape to reach photo-cell 33 and by way of a sprocket hole to reach photo-cell 31. The photo-cell 33 Fig. 3 is connected to the emitter of a transistor 34 the output of which after amplification by transistors 35, 36 appears across resistor 37. This signal, which represents the lighttransmission characteristic of the blank tape, is applied through a high resistance 38 to the photocell 31 so that the transmission signal is effectively subtracted from the photo-cell signal. Transistor 32 acts as a threshold device and the output, amplified in transistors 40, 41, is a two-state signal dependent on the relative sizes of the photo-. cell signal and the light transmission signal. The data-holes are similarly detected by photo-cells, the light transmission signal being applied to each one in the same way. The sprocket hole signals are further amplified in transistors 80, 84, Fig. 3a differentiated in diode 53 and resistor 52 and applied to set a flip-flop circuit consisting of transistors 55a, 55b. A series of "start" pulses is applied via diode 65 to the set input of the flipflop and the output is applied via transistors 56 and 57 to control the tape-drive motor. The arrangement is such that the motor is driven over the interval between sprocket holes and stops when a sprocket is registered with the hole in plate 15. The next "start" pulse restarts the motor and the tape advances to the next position. Specification 874,394 is referred to.
Patent GB-395091-A (GB)
Title: Improved apparatus for arresting runaway wagons and for analogous purposes
IPC: B61K7/16
Filed: 1932-03-12
Abstract: 395,091. Stopping runaway wagons &c. DAVIES, J. O., Sneyd Villas, Silverdale, Stoke-on-Trent. March 12, 1932, No. 7398. [Class 104 (ii).] Apparatus for arresting runaway wagons &c. comprises a lever 26 arranged to be struck by the wagon and to operate, through a bellcrank lever 25, a piston 22 in a dashpot 19 connected to a lever 12 engaging a slide 15 by means of a pin 14. The slide is connected by cable 16 to one end of a pivoted stop 18 which is normally held above the path of the wagon. If the speed of the wagon is excessive, the cylinder 19 moves with the piston 22 when the lever 26 is struck, thereby releasing the slide from the lever 12 and causing the member 18 to drop in the path of the wagon. The lever 26 may function in one direction only, swinging freely in the other direction. The dashpot may be set to operate at various speeds of the wagons by adjusting the ports 20, 21 and the screwed sleeve 24. In another form, the lever 26 projects horizontally across the path of the wagon, and is connected by linkwork to the dashpot. In another form, the lever 26 is normally held above the path of the wagon, and is lowered in emergency, the dashpot being replaced by a pivoted link. A signal may be operated when the stop 18 is dropped.
Patent GB-474565-A (GB)
Title: Means for starting up metal vapour electric discharge apparatus
IPC: H01J13/32
Filed: 1937-03-13
Abstract: 474,565. Metallic-vapour apparatus. SIEMENS - SCHUCKERTWERKE AKT.- GES. March 13, 1937, No. 7409. Convention date, March 13, 1936. [Class 39 (i)] To facilitate starting, the liquid cathode, e.g. a mercury cathode, is heated by an alternating magnetic field which may be generated by a coil 5 housed within an iron casing 6. An iron member 7 is arranged in the cathode and slots in the casing reduce eddy currents therein.
Patent GB-597208-A (GB)
Title: Improvements in and relating to overvoltage protective devices for electric circuits
IPC: H01T1/10
Filed: 1943-05-10
Abstract: 597,208. Protective arrangements. BRITISH THOMSON-HOUSTON CO., Ltd. May 10, 1943, No. 7418. Convention date, May 9, 1942. [Class 38 (iv)] An over-voltage protective device comprises one or more arc gaps in which the arcs are arranged to traverse openings in two or more barriers of insulating material. These barriers may be constituted by concentric cylinders and the openings may be staggered. Fig. 1 shows axial electrodes 12, 13 associated with tubular electrodes 15, 16 respectively which are connected together by a coil 40 which carries power current after a line surge has broken down a series gap 26 ; the impulse discharge passes across a gap 41 between electrodes 15, 16. Concentric cylinders 31 carried on an insulating rod 32 cooperate with cylinders 34, 35 carried on the electrodes 12, 13 to provide staggered circumferential gaps 37 through which arcs may pass, the field of the coil 40 causing these arcs to rotate and distribute erosion. The insulating cylinders are preferably of gas-forming material such as fibre. The device has a closure cap 18 and a cap 19 with a vent 38. Fig. 3 shows electrodes 54, 50, 55 co-operating with staggered openings 56, 58 in concentric insulating cylinders 53 ; a discharge causes pressure to build up in a reservoir 63 whereby a current of de-ionizing gas is caused to traverse the arc gaps as the power current falls at the end of a half cycle. Fig. 4 shows an arc path between electrodes 70, 73 defined by flat plates of insulating material connected by a space-wound coil 75 in series with an arc path between electrodes 74, 71 which traverses the spaces between concentric insulating cylinders 87 and an insulating disc 86 which are bridged by teeth 89. Any impulse discharge passes across the turns of the coil, but the power current traverses it to cause rotation of the arcs. The insulating material may give off gas and a pressure chamber 85 causes a deionizing blast across the arcs through a passage 91 to vents 90. A plug 92 of magnetic material may enhance the electromagnetic force.
Patent GB-378819-A (GB)
Title: Improvements in and relating to reversible internal combustion engines
IPC: F01L13/00
Filed: 1932-03-23
Abstract: 378,819. Reversing. AKT.-GES. BROWN, BOVERI, ET CIE, Baden, Switzerland. March 12, 1932, No. 7461. Convention date, March 23, 1931. [Classes 7 (ii) and 7 (v).] In a reversible four stroke engine a chain - driven rotary blower 1 supplies the air for forward running; on reverse running the engine draws its air supply from the manifold 7 to which there are attached three non-return air inlet valves 9. The blower, when running during reverse, also draws from these valves which are large enough to allow for the pump's action without disturbing the engine suction.
Patent GB-1236332-A (GB)
Title: Improvements relating to a.c. voltage-control apparatus
Inventor: PAULDEN ROBERT STEWART
IPC: H01F29/06
Filed: 1969-02-12
Abstract: 1,236,332. Transformer arrangements. FERRANTI Ltd. 30 Jan., 1970 [12 Feb., 1969], No. 7523/69. Heading H2H. [Also in Divisions G2-G3] The A.C. voltage across a load 10 is controlled by a regulator comprising a buck/boost transformer 12 whose secondary winding 11 is connected in series between the A.C. supply and the load and whose primary winding 18 is connected between contacts 15, 17 movable on windings 13, 16 which respectively provide coarse and fine regulation and are interconnected through a second movable contact 14 on the winding 13, the contacts 14, 15 being capable of passing one another when traversing the winding 13. The contact 17 is movable over a fraction of the length of the winding 16 and covers a range of voltage determined by the setting of the contact 14. Thus the range of control covered by the fine regulation is always a fixed fraction of the variable output voltage, so that accuracy of control is maintained down to a very low output voltage. The connection from the contact 14 may be made to the centre of the winding length traversed by the contact 17. The regulator may be used to vary or to stabilize the voltage across the load 10, the latter application involving the use of a motor-driven arrangement under the control of a sensing relay, with the coarse regulation contacts controlled so that the fine regulation contact always works about the centre of its range. The regulator may control a three-phase rectified supply, Fig. 2 (not shown), by employing one regulator per phase as shown in Fig. 1 and mechanically connecting corresponding contacts 14, 15, 17 to maintain the phases balanced.
Patent GB-292659-A (GB)
Title: Improvements in or relating to means for electrically transmitting imagery
IPC: H04N3/08
Filed: 1927-03-18
Abstract: 292,659. Robb, F. M. March 18, 1927. Copying-telegraphs; television.-The exploration of the object or of the receiving-screen is performed by means of oscillographs carrying mirrors and operated by tuned oscillatory circuits. An oscillograph 10 carrying a mirror 16 is vibrated at a high frequency by an oscillator 19 tuned by a dial 20 and an oscillograph 17 at right-angles to the oscillograph 10 and carrying a mirror 18 is vibrated at a low frequency by an oscillator 21 tuned by a dial 22. The oscillograph consists of a double wire 11 set between the poles of an electromagnet. A spot of light is reflected by the mirrors to an object 23 and thence to a lens 25 which focuses the light on a photoelectric cell 26. At the receiver, a beam of light from a source 35 is modulated by an opaque disc 29 operated by an oscillograph 28 and placed in the path of the light to exploring mirrors 31, 33 which are operated similarly to those at the transmitter. An amplifier 27 is introduced in the transmission line between the photoelectric cell and the oscillograph 28.
Patent GB-126452-A (GB)
Title: Improvements relating to Kettles, Boilers, and like Vessels.
Inventor: HILL JAMES NICHOLSON
IPC: A47J27/024
Filed: 1918-05-08
Abstract: 126,452. Hill, J. N. May 8, 1918. Block-form boilers.-A boiler &c. has in its bottom a recess A<1>, within which are arranged one or more zigzag tubes B communicating with the interior of the vessel. One end B<1> of each tube is higher than the other end B<2>. The tubes may be supported by connexions D.
Patent GB-576584-A (GB)
Title: Autoregenerative catalysts and processes of effecting dehydrogenation reactions therewith
IPC: B01J21/00
Filed: 1944-04-25
Abstract: 576,584. Dehydrogenation catalysts. SHELL DEVELOPMENT CO. April 25, 1944, No. 7690 Convention date, March 19, 1943. [Class 1 (i)] A dehydrogenation catalyst is prepared by forming a mixture of 20-75 mol per cent. of a hydrous oxide of iron or cobalt, which may be partly replaced by a hydrous oxide of manganese or nickel, and 80-25 mol per cent. of alumina, the oxides being precipitated in the presence of sulphate ions at a pH above 6, and drying the mixture. 0.3-5 mol per cent. of a promoter such as potassium or copper oxide may be added. The catalyst may be calcined at above 500‹C. but below sintering temperature. Deposition of carbon on the catalyst when used for dehydrogenation of hydrocarbons is retarded by conducting the reaction in the presence of the maximum amount of steam consistent with a non-cloudy liquefied product.
Patent GB-559687-A (GB)
Title: Improvements relating to the charging of crucibles
IPC: B22D41/00
Filed: 1942-06-05
Abstract: 559,687. Skips. MORGAN CRUCIBLE CO., Ltd., and MARSHALL, S. C. June 5, 1942, No. 7693. [Class 78 (iv)] A steel plate container for charging the crucible of a metallurgical furnace with metal ingots, scrap &c., is formed with a slightly-conical body 1 the larger, bottom end of which consists of sector-shaped vanes hinged at the periphery with points towards the centre, one vane, which is releasably held in position, supporting the points of all the others. As shown in Figs. 1 and 3, five upwardlyconcave vanes 7, 8 are hinged to a reinforcing ring 6, the vane 8 having a disc 9 supporting the points of the other vanes and an arm 10 resting at its end on an L-shaped lug 11 attached to a rod 12. When the rod 12 is rotated by a lever 13, the lug 11 is moved away from the arm 10 releasing the vanes to discharge the contents of the container as the latter is raised. Three buffers 16 on the ring 6 guide the container within the crucible, the descent of the container being limited by pins 19 screwed in lugs formed on an upper reinforcing ring 2 and adapted to rest on a suitable part of the furnace mounting. To enable the container to be charged away from the heat of the furnace, it can be mounted in a cradle carried on a truck, the cradle shown in Fig. 4 comprising five angle-iron supporting legs 20 connected by rings 21, 22 between which are pairs of vertical guides 23 adapted to engage the buffers 16 as the container is lowered in the cradle. The four vanes 7 are gradually closed, as the container is lowered, by engaging four curved guide brackets 24 on the ring 22 while the vane 8 is closed by a treadle-operated lever 25 on one of the legs 20 and locked in position subsequently by the lug 11.
Patent GB-442773-A (GB)
Title: Improvements in comminuted alloys
IPC: C22C7/00
Filed: 1934-05-10
Abstract: Comminuted alloys of the type suitable for the production of dental amalgams consist of particles having dimensions varying essentially between about 0,01 and 0,1 mm, and having the thickness about one third the length.  The particles may be made by cutting preferably tubular ingots of the alloy into chips, grinding the chips in a ball, rod, or cone mill, sorting the resulting granules by elutriation and annealing them.  During the casting and until cold the alloy is protected by a reducing atmosphere, and the cutting, and preferably also the grinding, is done under a liquid.  The subsequent annealing is done under a solution which may be an aqueous solution of a reducing agent. The particles so obtained have smooth convex surfaces and are free from cracks.  The alloy may consist mainly of silver with smaller amounts of tin and copper, particularly not less than 65 per cent of silver, not less than 25 per cent of tin, not more than 6 per cent of copper, and not more than 2 per cent of zinc, with or without small amounts of other metals such as beryllium, gallium, indium, germanium and palladium.
Patent GB-1209352-A (GB)
Title: Shaft positioning devices
Inventor: TYLER JOHN DRAYCOTT
IPC: F16H7/12
Filed: 1968-02-16
Abstract: 1,209,352. Grinding. MEGGITT ENG. Ltd. 14 Feb., 1969 [16 Feb., 1968], No. 7719/68. Heading B3D. [Also in Divisions B8 and F2] A pulley 12 for a continuous grinding belt (not shown) is rotatably mounted on a shaft 11 secured to an arm 9 pivoted about a non- rotatable pivot-pin 3 which is movable in a direction normal to the shaft 11 and the pivotpin axis to tension the belt, the arm 9 being rotatable about the pivot-pin 3 through a limited angle for belt-tracking adjustment. The pivot-pin 3 and arm 9 are slidable along guide rails 2 by a fluid pressure jack 5 acting via links 7, 8, or by a spring. An arm 10 rigid with the pivot-pin 3 carries a stud 16 which rotably supports a rod 17 which is screwed into a stud 15 on the arm 9, so that rotation of the rod 17 pivots the arm 9 and the shaft 11 about the pivot-pin 3. Alternatively, the studs 15, 16 may be connected by a Bowden mechanism or a fluid pressure jack.
Patent GB-1404925-A (GB)
Title: Soft thermoplastic segmented copolyesters suitable for use as pressure sensitive adhesives
IPC: C09J7/38
Filed: 1974-02-20
Abstract: 1404925 Copolyesters E I DU PONT DE NEMOURS & CO 20 Feb 1974 [20 Feb 1973 9 Oct 1973] 7728/74 Heading C3R A copolyester elastomer having a melt index of less than 30 and a melting point of 90 to 132 C. consists of 15 to 50% by weight of short chain ester units derived from butanediol and a mixture of aromatic dicarboxylic acids of molecular weight less than 350 containing 55 to 95% by weight of terephthalic acid, and 50 to 85% by weight of long chain ester units derived from a polytetramethylene ether glycol having an average molecular weight of 1500 to 3500 and the above mixture of aromatic dicarboxylic acids. The copolyester may be mixed with 1 to 99% by weight, based on the total thermoplastic components of a low molecular weight thermoplastic resin which is thermally stable at 150 C. and has a melt viscosity of less than 10,000 centipoises at 200 C. The compositions may also include U.V.-absorbers, plasticizers, antioxidants or fillers, e.g. wood flour, silicates, silica gel, alumina, clay, chopped fibreglass, titanium dioxide and carbon black. The examples describe a copolyester prepared from dimethyl terephthalate dimethyl isophthalate, 1,4-butanediol and polytetramethylene ether glycol and compositions containing the copolyester and one or more of the following: a polyindene petroleum resin, a vinyl toluene copolymer petroleum resin, an ethylene/vinyl acetate copolymer, a vinyl toluene/α-methyl styrene copolymer, polystyrene, and a rosin based alkyd resin. The pressure sensitive adhesive properties of the compositions are determined by coating polyethylene terephthalate film with the compositions.
Patent GB-1220036-A (GB)
Title: Improvements in or relating to lubricating systems
IPC: F16N29/00
Filed: 1969-02-13
Abstract: 1,220,036. Lubricating. MINSTER MACHINE CO. 13 Feb., 1969 [27 March, 1968], No. 7781/69. Heading F2A. A lubrication system, in which lubricant is pumped to a manifold 13 which distributes lubricant to the bearings of a machine 10 and has also an outlet returning lubricant to the pump, is provided with indicators in the return line and in at least one of the bearing lines which show the presence or absence of a predetermined flow of lubricant through the lines. Lubricant is forced by a pump 11 through a filter 12 to the manifold 13 in which are provided outlets to the bearings and a return outlet. The return outlet is situated remote from the inlet and is therefore at a relatively low pressure. Lubricant passes from the return outlet through the return flow switch 16 and a pressure relief valve 17 via the sump 14 to the pump. In at least one of the bearing supply lines is provided a flow switch. After lubricant has passed through the bearings it is recirculated to the pump via the sump 14. The flow switches comprise a piston 24 in a cylinder 21 formed in a block 20. Lubricant enters via a passage 23 and forces the piston up against the action of the spring 28, and when sufficient lubricant pressure prevails leaves via passage 27. The piston 24 contains a permanent magnet 25, which operates a magnetic reed switch 26. The switch is arranged so that when there is a flow of lubricant adequate to lubricate the bearings the magnetic switch is closed. If the flow of lubricant falls below a given rate the piston falls and opens the magnetic switch which is provided in an electrical circuit (Fig. 4, not shown) which either gives warning of the lubricant failure, or automatically stops the machine in which the bearings are located. The flow switches in the bearing lines are responsive to lubricant failure in those lines, and the switch in the return line responds to failure elsewhere in the system.