baber/WOPTO huggingface dataset:
Patent GB-403446-A (GB)
Title: Improvements in or relating to power plant for ship propulsion
IPC: H02P7/34
Filed: 1932-06-28
Abstract: 403,446. Control of D.C. motors. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and JAKEMAN, R. G., c/o General Electric Co., Witton, Birmingham. June 28, 1932, No. 18256. [Class 38 (iii).] Varying E.M.F.- Power plant for ships in which the propeller shaft is driven solely by electric power comprises a direct current electric motor for driving the propeller and a constant current generator adapted to supply the motor. The propeller 2 is driven by a shaft 3 on which are the rotary parts 5 and 6 of a double armature direct current motor having field windings 7, 8 respectively associated with the parts 5, 6. A Diesel engine 9 drives a generator 10 at substantially constant speed, the field winding 12 of which is energized from direct current bus bars 16, 17, with a shunt field winding 13 connected in series with a rheostat 14 across the rotary part 11 and with a series field winding 15 which is connected to oppose the field windings 12, 13, whereby the generator gives a substantially constant current output. The motor armatures may be connected across the generator armature through the contacts 19, 20 of a hand-operated circuit breaker 18 provided with overload trip coils 21, 22. The direction of rotation of propeller is controlled by a hand wheel 36 which controls the direction of rotation of the engine 9 and the contactors 102 and 103 of the motor, these contactors controlling an auxiliary motor driving a reversible regulator. Associated with the wheel 36 is a drum switch with conductor segments and contactors of which segments 51, 52, 53 and contactors 47, 48, 50 serve for ahead running and segments 54, 55, 56 and contactors 47, 49, 50 for astern running. The direction of the motor connecting the field windings 7, 8 to the bus bars is controlled in the required sense which is effected through a regulator 67 coacting with resistances 68-71, segments 76-83 studs 72-75, and central conducting ring 84. The regulator 67 carries brushes 88-91 which are shown in the neutral position. Movement of the arm clockwise or counterclockwise makes the circuit for the required direction of running. The arm also has limit switches constituted by segments 93-95 and contactors 96-98. The regulator arm and limit switch are adapted to be moved by an auxiliary motor 99 which is controlled by the ahead and astern contactors 102, 103 respectively.
Patent GB-580670-A (GB)
Title: Improvements in arc control devices for oil immersed electric circuit breakers
IPC: H01H33/75
Filed: 1944-09-25
Abstract: 580,670. Oil-break switches. SWITCHGEAR & COWANS, Ltd., and UPTON, A. Sept. 25, 1944, No. 18273. [Class 38 (v)] An explosion pot for an oil circuit-breaker has a partition a, through which the movable contact b passes, an oil bypass d between the oil spaces above and below the partition, and side ports e, f respectively above and below the partition, the port e being permanently o p e n but having a spring-loaded slide g which moves to uncover the port to a greater extent as the pressure increases. When the contacts b, c separate, a jet of oil passes out through port e, a further jet being produced when the port f is uncovered.
Patent GB-498016-A (GB)
Title: Improvements in and relating to means for securing permanent way rails to their sleepers
IPC: E01B9/34
Filed: 1937-07-01
Abstract: 498,016. Securing railway rails. WILLIAMS, Ltd., H., and WILLIAMS, O. R. July 1, 1937, No. 18294. [Class 104 (ii)] Rails are secured to chair plates 1 or sleepers by resilient steel clips 8 having a horizontal portion with a hole therein for a bolt or screw 7, and bent down or turned over at the outer ends 9 to bear on the plate 1 or sleeper, while the inner ends 10 are bent over or turned down to bear resiliently on the upper face of the rail flange with a pressure which increases as the screw 7 is tightened.
Patent GB-215226-A (GB)
Title: Improvements in and relating to machines for finishing screwnuts and similar articles
IPC: B21K1/64
Filed: 1923-07-16
Abstract: 215,226. Weber, G., and Kuhne, C. H. [Firm of]. July 16, 1923. T u r ning nuts; chucks; mandrels. - In a machine for facing nuts &c. the nut a is screwed onto a rotating threaded stem 17 which is moved axially after the finishing operation to remove the nut from its abutment 5 and so facilitate its withdrawal by a power wrench driven at a higher speed than the nut in the same direction. The hollow shaft 3 driven by a pulley 21 is splined to a screwed spindle 4 which carries the renewable stem 17 and is axially adjustable by means of a nut 41 which is locked after adjustment to a member 6 coupled to the shaft 3 by toggle levers 9. The toggles are operated by a sliding member 10 in order to lift the finished nut from its abutment. The front end of the shaft 3 carries a chuck comprising a spring sleeve 8 slidably connected by pins 13 to the conical end of the shaft and also slidably connected through a projection 14 with a threaded spring sleeve 12 on the stem 17. The abutment 5 engages the rounded end of the sleeve 8 and is retained by a ring 16, the pressure of the nut against its abutment thus serving to tighten the chuck. The nut a may be finished by means of a treadle-operated turning-tool (not shown) and is then removed by a socket wrench 18, Fig. 3, mounted on a swinging arm 19 and driven from a shaft 20 through a shaft 24 and spiral gearing. The arm 19 is normally held in the raised position shown in Fig. 2, but on completion of a nut the arm 19 is first swung downwards by means of a cam 27 operated by a handle 28, and then moved axially by a second cam 30 so as to bring the wrench over the nut. During the movement of the handle 28 the member 10 is actuated to lift the nut from its abutment by means of further cam and lever mechanism 38, 39. After unscrewing the nut the wrench is returned to its upper position, whereupon a spring plunger 32 strikes a fixed plate 35 to eject the nut into a receptacle. At the same time the stem 17 is retracted to its normal position ready for a fresh series of operations.
Patent GB-571890-A (GB)
Title: Improvements in or relating to asbestos-cement flue pipes
IPC: F16L59/07
Filed: 1943-11-04
Abstract: 571,890. Flue pipes. UNIVERSAL ASBESTOS MANUFACTURING CO., Ltd., and SNELLING, J. C. Nov. 4, 1943, No. 18340. [Class 25] [Also in Group XXVIII] An asbestos - cement flue pipe A has a jacket B of asbestos-cement or other material, spaced therefrom to enclose a dead air space. The outer tube fits over the socket end a of the pipe A and is closed at the spigot end by swaging at b' or by a ring of asbestos cement which is luted and pinned to both pipes. Specification 384,177, [Group XXVIII], is referred to.
Patent GB-772017-A (GB)
Title: Coating compositions and process for the manufacture of such compositions
IPC: C04B24/24
Filed: 1954-06-23
Abstract: A coating composition comprises a magnesia cement and from 1 per cent to 10 per cent by weight of the magnesia cement of a solid, finely divided, synthetic material, e.g. condensation products of formaldehyde with urea, thiourea, phenols, cramino-triazines, and polymers of ethylene derivatives, e.g. vinyl compounds, and acrylates.  The synthetic material is such as to be capable of further polymerization.  The magnesia cement may be made from 5 kg. of magnesium chloride solution reacted with 4 kg. of caustic magnesia.  The synthetic material may either be mixed dry with or added as an emulsion to either the caustic magnesia or the magnesia salt.  Wetting, preservative, flame-proofing, insecticidal or herbicidal agents, plasticizers, and pigments may be added.
Patent GB-530428-A (GB)
Title: Improvements relating to the manufacture of knitting-machine needles
IPC: B21G1/04
Filed: 1939-06-23
Abstract: 530,428. Knitting machine needles. EVERETT, S. J., and F. N. F., Ltd. June 23, 1939, No. 18356. Drawings to Specification. [Class 74 (ii)] [Also in Groups II and XXII] Relates to a needle assembly for use in a knitting-machine. The hook forms part of a member rigidly secured to a second member providing a tubular guide for a tongue. The second member may be a tube or may be troughshaped and closed along its mouth by the first member. This assembly is described in Specification 516,025 and may be made un as described in Specification 516,028, [Group II]. When the parts are made of carbon steel they may be treated by heating to 760‹-780‹C. in, for example, a salt bath, quenching in water or oil and tempering at 280‹C. The parts may be brazed with pure copper in a non-oxidizing atmosphere at 1100‹ -1200‹C. They are laid in a matrix and a mixture of two-thirds brick dust and one-third plaster of paris spread over them. A cover of three-fifths brick dust and two-fifths plaster of paris is placed in the tubular parts. This is afterwards dissolved out. Specification 490,755 also is referred to.
Patent GB-861585-A (GB)
Title: Worm gearing
Inventor: MCHUGH JOHN
IPC: F16H57/021
Filed: 1958-06-09
Abstract: 861,585. Toothed gearing. LEYLAND MOTORS Ltd. June 8, 1959 [June 9, 1958), No. 18362/.')8. Class 80 (1). In worm gearing particularly for vehicle back axles lateral movement of the worm-wheel 2 is prevented by adjustable metal pads 4 bearing against the flat faces of the wheel rim. As shown, each pad 4 is supported on the rounded heads of two threaded stems 6 adjustable in a fixed housing 3. Each pad 4, Fig. 3, has a central flat bearing-surface with chamfered ends to admit lubricant. During assembly the pad is held against the stems by wire passing through holes 10. The pads are preferably adjusted to give running clearance under no load conditions. The housing 3 may also contain a differential gear whose planet wheels are carried by the worm-wheel 2.
Patent GB-678993-A (GB)
Title: Negative impedance circuits and signal transmission lines loaded therewith
IPC: H04B3/16
Filed: 1950-07-25
Abstract: 678,993. Modifying line circuits to improve transmission. WESTERN ELECTRIC CO., Inc. July 25, 1950 [Aug. 30, 1949], No. 18551/50. Class 40 (iv). [Also in Group XL (c)] A repeater for reducing attenuation and distortion in a transmission line comprises a negative impedance converter including a valve with negative and positive feed-back. The converter comprises two valves V1 fed in push-pull on their cathodes, Fig. 5, with positive feed-back from the anode of one valve over capacitor C1 and resistor R1 to the grid of the opposite valve (see Group XL (c)), negative feed-back being provided by the impedance in the cathode circuit. The converter 4 may be arranged in series with a transmission line 3, Fig. 10, a suitable positive impedance ZN being connected across terminals 2. One half of the primary winding of transformer T1 is arranged in one side of the line, the other half being in the other side. In a modification, Fig. 11 (not shown), the terminals 2 are connected across the line while a positive impedance is inserted between terminals 1. The impedance ZN may be in the form of the network shown in Fig. 12 when the converter is used in a coil-loaded circuit while those shown in Figs. 13 and 14 may be used in non-loaded cable circuits. A combination of these networks, Fig. 18 (not shown), may be used when the converter is placed at the junction of a coil loaded and a non-loaded line. The positive feed-back circuit of the converter may be arranged to have a falling response at frequencies above and below the desired pass band. At speech frequencies the impedance is arranged to be negative, while at the lower ringing and dialling frequencies it is positive since the power handling capacity of the converter would be insufficient. Detailed consideration of stability of the converter is given when operating under various conditions in a number of cable sections. Specification 563,417 is referred to.
Patent GB-1506390-A (GB)
Title: Electric lighting systems
IPC: H02M3/338
Filed: 1974-04-27
Abstract: 1506390 Supply systems for gas discharge lamps EW CONTROLS Ltd 25 April 1975 [27 April 1974] 18558/74 Heading H2H A method of operating a cold cathode discharge lamp comprises connecting the lamp across the secondary X3 of a step-up transformer and energizing the primary with chopped D.C. which has a frequency greater than 15 kHz and an RMS voltage no greater than 700 V. A gapped-core transformer T1 having specified windings is preferably used. (For Figure see next column.)
Patent GB-952616-A (GB)
Title: Negative resistance diode circuit
IPC: H03B7/14
Filed: 1960-05-25
Abstract: 952,616. Semi-conductor diode circuits. RADIO CORPORATION OF AMERICA. May 25 1960 [July 7, 1959], No. 18572/60. Heading H3T. An electric circuit includes a negative resistance diode, a biasing current source connected across the diode, and a resistor having a positive resistance less than the negative resistance of the diode, effectively in parallel with the diode. An oscillator, Fig. 6, comprises a parallel wire transmission line 44, 46 between the conductors of which is connected a tunnel diode 48. The resistor in parallel with the diode comprises a piece of germanium 50 mounted between the conductors at a low impedance point on the line, and the biasing circuit comprising resistor 54 and battery 52 is connected across this resistor. The oscillator output is connected to a coaxial cable by a matching section 60, 62 and, if required, a variable capacitor may be connected across the other ends of the line for tuning. In Fig. 12 (not shown) two such oscillators have their bias circuits arranged in series. Instead of a battery, bias may be derived from a pulse source. In a push-pull oscillator, Fig. 8, two tunnel diodes 70, 72 are connected in push-pull, the parallel resistor 78 across which the bias is applied being connected at a point in the circuit where the A.C. currents through the diode circuits cancel out, so that it does not affect the A.C. operation. In a tuned amplifier circuit, Fig. 9, the diode 115 and a resistor 126 are connected across the opposite corners of a bridge comprising capacitors 102, 104, 106, 108 balanced at the operating frequency of the amplifier. A choke 124, and a decoupling capacitor 128 are included in the bias circuit. In an intermediate frequency amplifier, Fig. 10, the resistor 152 is connected in series with a tapped inductor 142 across the diode 140. The signal input is applied to a tuned circuit 154 and the output taken from a second tuned circuit 158, both of which are connected to a tapping- point 156 on the inductor 142, such that the negative conductance of the diode appears less than the positive conductance of the input and output circuits combined. Specification 952,615 is referred to.
Patent GB-942687-A (GB)
Title: Apparatus for loading railway waggons
IPC: B65G67/00
Filed: 1961-05-23
Abstract: 942,687. Loading moving trains of wagons. STAMICARBON N.V. May 23, 1961 [May 21, 1960], No. 18577/61. Heading B8E. Material is prevented from falling down between adjacent trucks 6, 7, moving under a shoot 1 by a flexible flap 12, made of conveyer belt, which is pushed over the bottom of the shoot to close it by the end wall of the truck 6. The flap is pivoted to the shoot 1 at 13 by a conveyer belt fastener and is stiffened and curved at the lower end as shown. The shoot is mounted on a wheeled frame 3 which straddles the line of trucks and can be pinned to supporting rails running parallel to the rails 8. The curved lower edge of the flap 12 profiles the end portion of the load, the rest of the load being profiled by resilient members 11. Specification 910,069 is referred to.
Patent GB-804725-A (GB)
Title: Improvements in or relating to crystal oscillators
Inventor: SPEARS RALPH AUBREY
IPC: H03B5/34
Filed: 1956-06-16
Abstract: 804,725. Piezo-electric crystals. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. May 22, 1957 [June 16, 1956], No. 18717/56. Drawings to Specification. Class 40 (8). [Also in Group XL (c)] A thermistor used in a circuit for preventing frequency drift in a crystal oscillator (see Group XI (c)) is mounted on the crystal element so that the two are subjected to the same temperature changes.
Patent GB-664730-A (GB)
Title: Improvements relating to the manufacture of moulded articles composed of a plastic, for example elastic rubber
IPC: B29C33/38
Filed: 1949-07-15
Abstract: 664,730. Making dies. PIRELLI SOC. PER AZIONI. July 15, 1949 [July 20, 1948], No. 18750/49. Drawings to Specification. Class 83 (ii). [Also in Group V] Powder metallurgy.-Sintered micro-porous metal is used as the mould, or the operative surface of the mould, in a process for making plastic articles, e.g. vulcanized rubber articles, this metal resulting in a venting of air trapped within the mould. The mould, or the operative part thereof, may be machined from stock micro-porous metal obtained by hot-pressing metal powder and then sintering: the powders used may be of different grain size. Alternatively, the. mould may be produced by pressmoulding a hot mass of metal powder (using a counter-die which is the obverse of the mould to be formed) and then sintering the shaped pressing, with or without subsequent coldsizing to impart to the pressing a smooth polished surface; the cold-sizing step may be carried into effect on the counter-die. The metal may be iron, iron alloy or aluminium; a steel mould may have a pore volume of 30 per cent.
Patent GB-213489-A (GB)
Title: Improvements in or relating to electric switches, wall plugs and the like
IPC: H02G3/18
Filed: 1923-07-21
Abstract: 213,489. Railing, M. J., and Collings, J. H. July 21,1923. Switchboards, plug boards, &c.-Relates to a manner of mounting switches, plug bases &c. on walls in which the switches &c. are mounted on grids in boxes the face plates of which are flush with the wall. According to the invention, the grid b is adjustably fixed in relation to the sides and back of the box a by providing it with lugs h which engage grooves e' in the heads of screws e which may be screwed up and down in projections g in the corners of the box a. The switches c and plug base d, Fig. 3, are fastened to the grid b by screws k, which pass through slots j in the grid, and nuts m or l. An ordinary nut m may be used or a special large nut l which has a waist l<1> enabling it to be slid alone one of the slots j.
Patent GB-122433-A (GB)
Title: Improvements in or connected with Copper-coated Printing Rollers.
IPC: B41N3/00
Filed: 1917-12-20
Abstract: 122,433. Taylor, Garnett, Evans, & Co., and Bassham, W. W. Dec. 20, 1917. Printing-surfaces. - Coppercoated printing-rollers have the engraved or etched design removed by removing the ground or parts in relief bv electrolysis. The copper removed may be deposited evenly on another roller by using a " doctor " or abrasive device acting upon the surface of the roller during the electro-deposition. In the arrangement shown in Figs. 1 and 2, the roller a with engraved copper coating b has the intaglio parts c filled with insulating material and is connected up as an anode in the bath d so that copper is removed from the unprotected relief parts b. A scraper may act at intervals on the roller a. Copper removed from the roller a is deposited on a cathode which may be a roller e on which a doctor or wiper f of glass or other inulating material acts continuously during the deposition, to wipe or remove the electrolyte from the more prominent parts and produce a gradual levelling or evening of the deposit. Instead of or in addition to the doctor f, a bmnishing or abrasive device may be used consisting of blocks of granite or the like carried by a bar h, Fig. 4, and acting on the surface of the roller e during the deposit. The bar h may be reciprorated by a lever k and cam m A wiper n may be placed to act on the surface of the roller e between the point at which it leaves the solution in the bath d and the bar h.
Patent GB-811414-A (GB)
Title: Francis turbine runner and method of making the same
Inventor: ALM OSCAR EMANUEL
IPC: F03B3/12
Filed: 1957-06-17
Abstract: 811,414. Hydraulic turbines. KARLSTADS MEKANISKA WERKSTAD A.B. June 17, 1957, No. 18962/57. Class 110 (3). A Francis turbine wheel comprises a hub and blades cast in one piece to which is attached by a permanent joint a separately made shroud. A Francis runner comprises a hub 11 and blades 13 cast in one piece and a shroud 15 cast as another piece. The lower edge 23 of the blades is welded to the shroud at the points 29, 33, and at a further point arranged on the opposite side of the blade from the point 29. The shroud 15 and the passages between the blades 13 are finished machined before assembly. The shroud may be formed of pressed steel plate. To ensure that the joint between the shroud 15 and the blades 13 is sealed, a thin wire may be welded along the edge 23.
Patent GB-152803-A (GB)
Title: Improvements in or relating to flue dampers of steam generators, ovens, or the like
IPC: F23L13/00
Filed: 1919-07-31
Abstract: 152,803. Fletcher, L. July 31, 1919. Stuffing - boxes, substitutes for. - A flue platedamper is made airtight by means of a fitting comprising a casing c open at the bottom having a top slotted at d for the passage of the damper and a packing ring i held in a groove in the top and a similar groove in the slotted plate f. A flange l on one side and both ends of the casing provides anchorage in the brickwork.
Patent GB-578523-A (GB)
Title: Improvements in or relating to heat exchange apparatus
IPC: B64D33/10
Filed: 1943-11-15
Abstract: 578,523. Heat-exchange apparatus. CHURCHILL, J. A., BELAIEFF, J. F., DELANEY, C. T., and GALLAY, Ltd. Nov. 15, 1943, No. 18999. [Class 64 (iii)] Annular heat exchange apparatus, e.g., a radiator for an aircraft engine, comprises a plurality of passages for fluid to be cooled disposed in cylindrical formation about the axis of the apparatus, and one or more passages for cooling medium radiating from that axis and progressing axially of the apparatus. In one form, an annular radiator comprises two conical cowlings 21, 22 disposed one within the other with a common axis, annular header tanks 23, 24, 25, 26 on the cowlings 21, 22, and a cylindrical matrix 20 containing U-shaped passages 27, 28 which are arranged in nests, each nest lying radially and the nests being separated by radial gaps in which are disposed pairs of sheets of corrugated metal, forming the passages for the cooling air. The corrugations run parallel to the surfaces of the cowlings. The passages 27, 28 may be formed by corrugated plates in rhomboidal casings, or by U-shaped tubes nested within one another and passing through conical supporting gills which replace the corrugated sheets between the nests. The passages 27 in some of the nests, e.g., alternate nests or pairs of nests, open into the header tanks 25, 26, and the passages 28 in the intermediate nests open into the tanks 23, 24. Oil to be cooled may flow through the tanks 23, 24 and passages 28, and water through the tanks 25, 26 and passages 27. To enable liquid to pass to and from the headers 23, 24 without interference with the flow of air through the passage 58, a pair of passages arranged in positions similar to the nests of passages 27, 28 extend right through the headers 25, 26 at the rear, and at the front open one into each of the headers 23, 24. The headers at both ends may be divided diametrically. The two halves of each header at the front may be connected together so that the fluid can flow from one half to the other. In another form, there is a single annular header on each cowling, and these headers are connected by straight tubes across the conical air passage. In this passage are arranged a series of parallel frustoconical plates or gills through which the tubes pass. Radiators may be formed in two or more segments to facilitate assembly or removal.