baber/WOPTO huggingface dataset:
Patent GB-1353648-A (GB)
Title: Electrical signal conversion device
IPC: H03M1/00
Filed: 1971-04-19
Abstract: 1353648 Transistor amplifier circuits TECHNICAL MANAGEMENT SERVICES Inc 19 April 1971 [27 Jan 1970] 20354/71 Heading H3T A D.C. to D.C. transformer comprises a core with primary drive, secondary and sense windings, a high gain electronic amplifier, means for supplying a negative feedback signal from the sense winding to the amplifier, a pair of input terminals, switching means for cyclically connecting the input terminals to the amplifier with first one and then the other polarity and for periodically connecting the drive winding to the amplifier thereby supplying magnetizing current and means for maintaining the magnetizing current below the core saturation level. As shown, the drive winding 28, which may be the shield of a coaxial cable is driven by amplifier 32. Sense winding 30 is the coaxial cable core and the two are short circuited at the cable resonant frequency by I.C. circuit 57, 50. The direct voltage input is applied between terminals 34 and the circuit is controlled by closing alternately pairs of switches 36 and 40 or 38 and 42. During the current drive subcycle (36 and 40 closed), the amplifier produces a drive current proportional to the difference between the input voltage and the voltage across the sense winding and this current charges capacitor 44. Flux increases linearly in the core. During the restore subcycle (38 and 42 closed) current flows from capacitor 44 and the flux in the core decreases linearly. The secondary comprises a plurality of windings of turns ratio 1 : 2 : 4 ... 2<SP>n</SP>, or pairs of such windings, e.g. 58 and 60. The windings may be connected by switches 74, 76, 78 with any number of them in series and making either a positive or negative contribution to the sum voltage. The secondary output is of the form shown in the top line of Fig. 6, the cycle time being about 1 mS, and to ensure linearity, the secondary voltage is sampled only during pulse 184 to ensure that the transients 181 have subsided. The range of the output voltage may be extended by using a second transformer in cascade (Fig. 4, not shown) with drive and sense windings in series with those of the first transformer and the ratio of the number of turns in the drive windings being the inverse of that of the number in the sense windings. The second core may be used for the " less significant" voltage stages and can be of lower quality construction. In an alternative embodiment (Fig. 7, not shown) which can function as a digital to analogue converter, two transformers are provided. Each has a longer drive subcycle than restore subcycle and the secondaries, the turns of which are selected by a digital input are alternately connected to the output so that a steady voltage is maintained.
Patent GB-1249277-A (GB)
Title: Stabilisation of developed photographic silver images
Inventor: BERTHOLD WERNER
IPC: G03C1/43
Filed: 1970-04-29
Abstract: 1,249,277. Stabilization of developed photographic images. AGFA-GEVAERT A.G. April 29, 1970 [April 29, 1969], No.20532/70. Heading G2C. A process for the production of a photographic image comprises exposing a photographic material which contains at least one silver halide emulsion layer, development, and stabilization of the unexposed and undeveloped silver halide, wherein the bath used in the development step contains at least one compound of the following formula or a salt thereof: wherein n is 1, 2 or 3. The developing agent may be in the light-sensitive silver halide emulsion layer and development is then effected with an aqueous alkaline bath. Stabilization may be effected with a bath containing ammonium thiocyanate and which may also contain cyclohexanone bisulphite. The concentration of the compound of the formula above is preferably 0.5 to 10g/litre of the treatment bath in which development is effected. These compounds stabilize black silver images particularly upon prolonged storage under extreme climatic conditions.
Patent GB-138660-A (GB)
Title: Improvements in and relating to elastic fluid turbines
IPC: F01D1/24
Filed: 1918-12-10
Abstract: 138,660. British Thomson - Houston Co., (General Electric Co.). Dec. 10, 1918. Balancing moving parts; leakage-preventing devices; regulating.-In a turbine provided with end-thrust balancing disks 24, 25 and radial-flow and axial-flow packings 26, 45 arranged in series, the passages 48 between the two sets of packings are used to convey steam to or from an intermediate stage of the turbine. For this purpose, the passages 48 communicate on one side with a chamber 52 leading to a steam-chest 42, which is secured to a chamber 30 adapted to supply overload steam to rotor passages 37. Fig. 1 shows the invention applied to a turbine of the oppositely-running rotor type, each rotor carrying a radial-flow system 11 and an axial-flow system 15.
Patent GB-1061863-A (GB)
Title: Control system
IPC: G05D1/08
Filed: 1964-05-19
Abstract: 1,061,863. Automatic control. SPERRY RAND CORPORATION. May 19, 1964 [May 20, 1963], No. 20561/64. Heading G3R. In a self-adaptive feedback control system, system gain is automatically controlled to maintain a balance between the energies of all error signal components which are respectively above ' and below a predetermined frequency. In an automatic control system for an aircraft, Fig. 1, A. C. signals from a pitch attitude gyro 3, a pitch rate gyro 2, and a manual or automatic pitch attitude controller 4, are filtered at 5 and combined to control, through a variable gain device 11 and an amplifier 9, a hydraulic actuator 6 operating elevators 7 and a positional feedback signal generator 10. The combined control signal is also applied to a band-pass filter 16 passing low-frequency components, and through a variable gain device 26 to a band-pass filter 17 passing high-frequency components. The outputs of the two band-pass filters are averaged by rectifier circuits 18 and 19 and compared at 20. Any difference appears as a D. C. signal which is applied through short and long time-constant circuits 21, 22 to adjust variable gain device 11 and thus maintain a balance between the low and high frequency components. Circuit 21 includes resistance-capacity networks and rectifiers, and is polarity responsive to cause reductions of gain more rapidly than increases of gain. Circuit 22 is an integrator circuit formed by capacitative feedback. The band-pass filters, which include resistance-capacity networks and transistors, are so designed that a balance between low and high frequency components results in optimum gain, but, to compensate for the smaller high frequency content during high speed flight, the output of circuit 22 is caused to vary the gain of circuit 26. To enable the control system to deal with a wide range of signal magnitudes, automatic gain control is provided by applying the output of averaging circuit 19 to vary the gain of device 25. The variable gain devices may include resistors and rectifiers or may be variable gain amplifiers.
Patent GB-203315-A (GB)
Title: Improvements in and relating to testing machines
IPC: G01N3/06
Filed: 1923-08-13
Abstract: 203,315. Morgan & Wright, (Assignees of Coffin, J. G.). Sept. 1, 1922, [Convention date]. Hydrostatic apparatus.-A device described for indicating and recording the stress applied to a test piece in a testing machine comprises a closed elastic hydraulic system including a container 1 having rigid end walls and collapsable side walls, and a fluid-pressure gauge 8 of the Bourdon tube type connected to the container by a pipe 14. The system contains a liquid such as alcohol, oil or water. The force to be measured is applied to the container 1 through an abutment 4, and is recorded by a marker 13, the extent of collapse of the container being limited by internal plugs 7. The Specification as open to inspection under Sect. 91 (3) (a) comprises the application of the device to weighing apparatus. This subjectmatter does not appear in the Specification as accepted.
Patent GB-913216-A (GB)
Title: Improvements in and relating to a driving mechanism
IPC: G01B3/00
Filed: 1959-06-18
Abstract: 913,216. Ratchet clutches; variable-speed gear. SOC. GENEVOISE D'INSTRUMENTS DE PHYSIQUE. June 18, 1959 [June 24, 1958], No. 20940/59. Class 80 (2). A two-speed bidirectional drive for the shaft 11 operating the bed of a measuring-machine is provided by a hand wheel 18 giving a coarse feed through a cup-shaped member 20 carrying a pinion 22 meshing with a pinion 23 on shaft 11, and by a knob 19 giving a fine feed through an epicyclic gear train of which the output pinion 30, under those conditions, is clutched by a detent roller 36 to member 20. Knob 19 is carried by a fixed spindle 16 and is coupled to a carrier plate 27 for a planet pinion 28 meshing with a fixed pinion 29 and a free pinion 30 having a slightly different number of teeth. Clutch roller 36 is carried in a cage 38 frictionally engaging spindle 16 and is normally pressed by a circular spring 37 into a V-notch 34 in a disc 32 integral with pinion 30, so as to be inoperative when the drive is taken from hand wheel 18, but when taken from knob 19 movement of disc 32 causes one of the inclined faces of notch 34 to press roller 36 into contact with an internal flange 33 on member 20 to transmit the drive through pinions 22, 23.
Patent GB-1423010-A (GB)
Title: Character recognition apparatus
IPC: G06K9/70
Filed: 1973-05-02
Abstract: 1423010 Character recognition systems INTERNATIONAL BUSINESS MACHINES CORP 2 May 1973 [9 May 1972] 20958/73 Heading G4R A character recognition apparatus includes means for performing a sequence of tests upon the character to be identified. Each test for a feature of the character depends upon the presence or absence of the feature tested for by the preceding test. The test sequence thus takes the form of a decision tree. The apparatus disclosed may use a column of photo-sensors moved over the character or a single cell which receives light from successively illuminated parts of the character. The signals are digitized and passed to a shift register storage matrix. As the character steps through the matrix signals from a square array of the image points are fed from the matrix to a store and may be used for removal of spurii. The store can hold at least two charaictets. The matrix store also passes the character signals to circuitry which determines the horizontal and vertical extent and position of the character. The information is used to centre a notional grid on the character, and the series of tests is performed with reference to the grid points. The tests determine character features such as the directions of stroke elements, and the presence of bays. The decision tree identifies a character by performing only the tests necessary for the relevant features, e.g. as shown in Fig. 6, for the identification of a numeral 4. The succession of tests is controlled by a set of instructions held in a store. Each instruction for a current test includes the addresses of two more instructions. One or other of these addresses, dependent on the result of the current test operation, is used to obtain the next instruction, and so on.
Patent GB-531351-A (GB)
Title: Improvements in and relating to autographic registers
IPC: B41L5/06
Filed: 1939-07-19
Abstract: 531,351. Autographic recorders. LAMSON PARAGON SUPPLY CO., Ltd., and GARWOOD, V. W. July 19, 1939, No. 20974. [Class 106 (i)] In an autographic recorder of the kind operating upon a folded pack of strips of continuous stationery, the advancing strips are caused to pass back beneath the feed mechanism and to fold automatically into a pack behind the feed mechanism, the front end of the pack lying only a short distance in front of the feed mechanism. The strip is fed by a toothed wheel 4 and turned back to fold in a pack 6 by a guide 10. A pivoted tongue 14 helps to hold the pack in position and assist folding.
Patent GB-1468030-A (GB)
Title: Laminatedstructures
IPC: B64F5/00
Filed: 1974-05-13
Abstract: 1468030 Repairing aircraft structures AVIONS MARCEL DASSAULT-BREGUET AVIATION 13 May 1974 [18 May 1973] 20982/74 Heading B7W [Also in Divisions B5 and D1] A method of producing a laminated patch or reinforcement on a surface of an aircraft comprises cleaning the surface to be covered and depositing thereon an epoxy resin associated with a fibrous reinforcement, the reinforcement consisting of coherent sheets of parallel boron fibres interwoven with transverse fibres of another material, the sheets being not prior coated and being superposed and coated with a cold-hardenable epoxy resin. The sheet shown in Fig. 1 comprises boron fibres 1 almost in contact and spaced transverse fibres 2 of another material, e.g. polyester or glass fibres, the fibres 2 being extended a few millimetres at the two edges of the sheet and woven together with glass or polyester fibres or filaments 3, parallel to the boron fibres to form safety borders holding the boron fibres in position. In the embodiment described with reference to Figs. 2 and 3, a patch is applied to an aircraft skin having two fuselage elements 4, 5 assembled end-to-end with back plate 6 positioned underneath and attached thereto by countersunk rivets 7, fatigue having developed a crack 8 between two rivets. In forming the patch, the surface is cleaned with a mixture of sulphuric and chromic acids, rinsed and coated with a dilute epoxy resin containing a cold hardener which is allowed to dry prior to the application of a commercial concentration epoxy resin containing a cold hardener. This coating being immediately overlaid with a sheet of the boron fibres, the boron fibres being parallel to the crack and the sheet impregnated, e.g. by brushing with the epoxy resin/hardener, further sheets up to desired number being applied by similar methods. The assembly is overlaid with a sheet 10 of plastics material and vacuum applied through connector 12 until the epoxy resin is cured and the sheet 10 removed, the sheets being preferably of decreasing width.
Patent GB-1307656-A (GB)
Title: Stable solutions of polyglutamic acid derivatives
IPC: D01F6/68
Filed: 1971-04-19
Abstract: 1307656 Artificial leather KYOWA HAKKO KOGYO CO Ltd 19 April 1971 [10 Feb 1970] 21042/71 Heading B2E [Also in Division C3] Artificial leather is made by coating woven or unwoven fabrics with a solution comprising an inert organic solvent and (I) a polyglutamic acid derivative stabilised by the presence of (P) a polyether polyol or an alkylenediamine polyetherpolyol. R is a C 1-10  hydrocarbon residue or halogen- or nitrosubstituted derivative thereof. (I) may have M.W. # 50,000; there may be 1-50% wt. (I) in the solution. There may be 0.01-20% wt. (P), based on (I), in the solution.
Patent GB-358148-A (GB)
Title: Improvements in fittings for electric plugs for floors, wainscots, walls and the like
IPC: H02G3/12
Filed: 1930-07-11
Abstract: 358,148. Bases for couplings. WHITE, S. D. and LEVENGER, M., Magnet House, Kingsway, London. July 11, 1930, No. 21073. [Class 38 (i).] A junction-box 1 has on its base a screw-threaded nipple 2 for the connection of a conduit. The box has a screw-threaded opening 3 in which is mounted a tube 4 provided with a flange 8. The insulating socket block 5 of a plug-andsocket coupling is mounted on a flange 6 attached to the face of the tube 8. A flap 9 covers the socket entrance.
Patent GB-980339-A (GB)
Title: Multi-electrode cold-cathode discharge tube
Inventor: REANEY DONALD
IPC: H01J17/48
Filed: 1962-06-01
Abstract: 980,339. Multi-electrode cold-cathode tubes. ERICSSON TELEPHONES Ltd. April 26, 1963 [June 1, 1962], No. 21131/62. Heading H1D. An electric counting circuit comprises a multi-electrode coldcathode tube having a first electrode C, a plurality of second electrodes A 0 -A 9  arranged equidistant from the first electrode, and a similar plurality of intermediate electrodes L 0 -L 9  located one between each pair of adjacent second electrodes, wherein in operation a discharge is invested between the first electrode and one of the second electrodes, the discharge moving from one to another of the second electrodes under the influence of a uniform deflecting field perpendicular to the field existing between the two invested electrodes, and wherein the movement of the discharge is prevented by the application of a locking potential to the intermediate electrodes. The deflecting field may be magnetic, Fig. 1, or electric, Fig. 3. In Fig. 1, a cylindrical magnet 12 surrounds the tube and produces a magnetic field parallel to the axes of the electrodes, the magnet may be a permanent or an electromagnet, and may be disposed inside the tube. In Fig. 3, a plurality of bias electrodes B 1  . . B 20  are arranged outside the other pluralities of electrodes midway between each of them, alternate bias electrodes being electrically connected together.
Patent GB-136879-A (GB)
Title: Improvements in and relating to Two-stroke Internal Combustion Engines.
Inventor: LYNN GEORGE WILLIAM
IPC: F02D15/00
Filed: 1918-12-19
Abstract: 136,879. Lynn, G. W., and Fison, F. J. Dec. 19, 1918. Regulating.-In a two-stroke-cycle engine of the type in which the cylinder is scavenged by air under pressure and fuel is admitted after the closing of the air admission and exhaust orifices, governing is effected by holding open during the compression stroke an adjustably-actuated exhaust valve in the cylinder head. The invention is described in connexion with an engine forming the subject-matter of Specification 133,830 [Class 7 (ii), Internal-combustion engines. Arrangement &c. of]. Fig. 3 illustrates a cam gear for actuating the exhaust valve, the larger swell on the cam P actuating the valve during the exhaust period, and the smaller swell holding the valve open during compression for a period determined by the position of the lower end of the valve-rod D. A rocking-arm K is retained in contact with the valve-rod D by a spring Z, the length of the rod being adjusted by a screw-and-nut connexion X. Alternative means for varying the position of the lower end of the valve-rod comprise (1) an adjustable wedge movable in a direction at right-angles to the axis of the valve and located between the valve-rod and a lever which actuates the valvestem, and (2) a wedge located as in (1) but movable in a direction at right-angles to the axis of the lever. According to a further modification, the exhaust valve may be actuated by a sliding cam on the crank-shaft. The adjustment of the valve opening in each of the above-described constructions occurs simultaneously with a corresponding adjustment of the fuel supply.
Patent GB-420426-A (GB)
Title: An improved preparation for removing rust, ink and fruit stains from linen and otherwashable materials
IPC: C11D9/26
Filed: 1934-07-20
Abstract: A detergent, especially suited for removing rust, ink and fruit stains from linen, is prepared by mixing preferably equal weights of citric acid, sodium chloride and potassium binoxalate, with or without soap.
Patent GB-1091021-A (GB)
Title: Charging car for coke oven batteries
IPC: C10B31/04
Filed: 1966-05-13
Abstract: 1,091,021. Charging coke ovens. HEINRICH KOPPERS G.m.b.H. May 13, 1966 [June 16, 1965; Feb. 25, 1966], No. 21388/66. Heading F4B. A coke oven charging car includes means for collecting the gases given off during charging, said means comprising a sleeve 7 forming an annular chamber 8 around each coal discharge trunk 5 and an exhaust duct 9, including washing liquid injection nozzles 12 and 13, leading from the chamber 8 to a beater scrubber 10. The solid particles and the liquid and tar droplets pass from the beater scrubber to a static separator 17. The duct 9 may include a combustion chamber 24 having air inlets 25, ignition means 26 and an explosion door 27. Air may be supplied to the coke oven through a pipe coaxial with the trunk 5. The charging car which includes four discharge trunks corresponding to a row of four charging holes on the coke-oven roof and moves on wheels engaging a track on the roof further comprises a water tank 21 feeding a main 23 which supplies all the nozzles 12 and 13 and a common collector for the sludgy liquor from the separators 17. The trunks are fed from hoppers on the car by rotating disc feeders.
Patent GB-1485591-A (GB)
Title: Pegs for castors
IPC: B23P15/00
Filed: 1976-05-14
Abstract: 1485591 Attaching castors COLGRYP CASTOR & PRESSINGS CO Ltd 14 May 1976 [20 May 1975] 21388/75 Heading A4U [Also in Division B3] A method of making a peg for mounting furniture castors comprises forming a collar near one end of a cylindrical blank by a cold-heading operation and forming a shoulder 5 at the other end of the blank by rolling a groove 4 in the shank of the peg. Simultaneously with the cold-heading operation, the other end of the blank is partially extruded through an open end of the cold-heading die to form a reduced portion (3) in which the groove 4 is then formed.
Patent GB-144744-A (GB)
Title: Improvements in or relating to furnaces for melting glass and other purposes
IPC: C03B5/04
Filed: 1918-12-21
Abstract: 144,744. Shaw, J. S., Shaw, S. H., and Shaw, A. E. Dec. 21, 1918. Open-hearth furnaces. - In a furnace for melting glass and for other purposes, air passes from inlets at the front of the furnace through a number of passages i beneath the bath b to a cross. passage j, whence it is conveyed by vertical passages k to a cham. ber g in the crown and passes by ports n to the furnace. Gas is delivered from a passage e through ports f alternating with the ports n. The waste gases pass from the rear of the furnace through vertical flues t to a cross flue s, whence they pass through flues p beneath the air passages i to a cross flue q communicating with the chimney flue.
Patent GB-986733-A (GB)
Title: Muff coupling for structural members
Inventor: WYATT PETER BURNET
IPC: F16B7/04
Filed: 1961-06-14
Abstract: 986,733. Rod and tube joints. RUSTONBUCYRUS Ltd. Aug. 16, 1962 [June 14, 1961], No. 21483/61. Heading F2G. A coupling for joining two structural members 3 and 4 end to end includes two male plugs 1 and 2 which are clamped together by two female half-sockets 7 and 8 which engage on tapered faces 1a, 2a and are held together by one control bolt 5 transverse to the axes of the members 3 and 4 to act as a key which transmits loads in shear or in tension between the members. Fig. 1 is an exploded view of the coupling. The plugs 1 and 2 fit into the members 3 and 4 at 1d and 2d and are welded thereto. The unthreaded end of the bolt 5 is welded into the half socket 7 and a boss 9 is welded on to the outside of the half-socket 8. A locking pin 6 serves to position the members during assembly of the coupling. The structure shown in Fig. 2 comprises four sets of tubular members assembled with the nuts 10 of the coupling positioned inwards; so that the structure may act as a guide for a sliding clip 9, for a pile driving hammer or other such apparatus.
Patent GB-788896-A (GB)
Title: Improvements in or relating to novel substituted butanediol
Inventor: MILLS JACK
IPC: C07C51/06
Filed: 1956-07-11
Abstract: The invention comprises 2-p-chlorophenyl-3-methyl-2 : 3-butanediol, and the method of preparing it by the action of sodium cyanide on p-chloracetophenone, hydrolysis of the product with hydrochloric acid to give p-chloroatrolactamide, further hydrolysis to p-chloroatrolactic acid, conversion of this to its ethyl ester, and reaction of the ester with methyl magnesium iodide, decomposing the product with ammonium chloride and isolating the crystalline residue of the above compound, having the formula <FORM:0788896/IV (b)/1>