baber/WOPTO huggingface dataset:
Patent GB-691507-A (GB)
Title: Triazine vat dyes
IPC: C09B1/467
Filed: 1951-08-08
Abstract: 2 - (o - Methoxyphenyl) - 4,6 - dichlortriazine is obtained from the 4,6-dihydroxy body by reaction with phosphorus oxychloride and pentachloride.  2 - (o - Methoxyphenyl) - 4,6 - dihydroxy - triazine is obtained by treating o-methoxybenzoylbiuret with aqueous caustic potash.  o-Methoxybenzoylbiuret is obtained by heating o-methoxybenzoyl dicyandiamide with aqueous hydrochloric acid.  o - Methoxybenzoyl dicyandiamide is obtained by treating dicyandiamide in acetone with caustic potash to its potassium salt, and reacting this with o-methoxybenzoyl chloride.ALSO:The invention comprises 2 - (o - methoxyphenyl) - 4,6 - di - (41 - methoxyanthraquinonyl-amino)-triazine, which is a red vat dye and is prepared by heating 2-(o-methoxyphenyl)-4,6-dichlortriazine (see Group IV (b)), with 1-amino-4-methoxyanthraquinone.  An example of the condensation is given wherein the reactants are heated in nitrobenzene.
Patent GB-965549-A (GB)
Title: Two-stage gas pressure regulator
Inventor: WILSON GERALD
IPC: G05D16/06
Filed: 1960-05-26
Abstract: 965,549. Valves. BRITISH OXYGEN CO. Ltd. May 24, 1961 [May 26, 1960], No. 18723/60. Heading F2V. A two-stage gas pressure regulator in which a high pressure gas stream passes a first valve 33 governed by a diaphragm 11 to reach an intermediate pressure chamber 37 and then a second valve 44 governed by a diaphragm 12 to reach an outlet pressure chamber 40 has the valves in axial alignment with each other in respective coaxial housings 10, 14 within a casing assembly incorporating separable parts each formed as a body of revolution. The valve 33 is loaded by a spring 34 and has a thrust rod 38 for engagement by a bored centre fitting 39 on the diaphragm 11 which also has a tubular projection 42 in telescopic engagement with a similar projection 41 on an apertured thrust plate 23, a seal 43 being provided between the two projections. Gas from the intermediate pressure chamber 37 passes through the fitting 39 and the projections 41, 42 to the second valve 44 which is also provided with a thrust rod 46 for engagement by its diaphragm 12. The latter is loaded by an adjustable spring 25 while the diaphragm 11 is loaded by a spring 24 and by the pressure in the outlet chamber 40. A pressure gauge 50 and two relief valves 48, 49 are provided.
Patent GB-357539-A (GB)
Title: Improvements relating to the manufacture of metals and alloys
IPC: C22B9/05
Filed: 1930-06-19
Abstract: A process for refining metals and alloys consists in passing iodine vapour through the molten metal or alloy.  Refining material, comprising an iodide or iodides, for example, potassium or barium iodide or a mixture of the two in the proportion of 1-2 parts of iodide to 1000 parts of molten metal, is placed in or applied to the vessel containing the metal whereupon the iodide is decomposed and free iodine passes through the metal.  In foundry work for making steel castings, cast iron, &c., the refining material may be applied at the bottom of the ladle whilst in casting steel ingots it may be applied at the bottom of the mould and also to the walls in conjunction with any usual protective coating.
Patent GB-516382-A (GB)
Title: Improvements in or relating to tyres
IPC: B60C17/00
Filed: 1938-06-24
Abstract: 516,382. Wheel tyres. ZIPPER, E. June 24, 1938, No. 18778. Convention date, April 22. [Class 144 (ii)] A pneumatic tyre is formed with thick sidewalls 1, 2 having shoulders 16, 17 adapted to support the load on deflation of the tube 14 which normally distends the relatively-thin tread 12 into road contact. The tyre and rim may be formed with interengaging projections and recesses 21, 22.
Patent GB-709287-A (GB)
Title: Improvements in or relating to magnetic heads for magnetic sound recording apparatusemploying high-frequency bias
IPC: G11B5/03
Filed: 1951-08-10
Abstract: 709,287. Magnetic recording apparatus. KLANGFILM GES. Aug. 10, 1951 [Aug. 12, 1950], No. 18924/51. Class 40 (2). A magnetic recording head having poles 3, 4 has separate coils 1, 2 for the high frequency bias and for the audio-frequency respectively. The poles may have an air gap 5 or they may be brazed together with copper or brass. The coil .2 is screened by a copper block 7 or in a modification Fig. 3 (not shown), by a further pole of the same material as the other poles. In a further modification, Fig. 4, the poles 1, 2 are arranged in a staggered relationship on either side of the recording tape 6. An iron pole 10 is provided for screening purposes.
Patent GB-531188-A (GB)
Title: Improvements in and relating to control systems
IPC: H03J5/24
Filed: 1939-06-29
Abstract: 531,188. Valve relay circuits; radio receivers. PHILCO RADIO & TELEVISION CORPORATION. June 29, 1939, No. 18961. Convention date, July 20, 1938. [Class 40 (v)] [Also in Groups XXXVIII and XXXIX] Control mechanism such as step-by-switch mechanism comprises a primary element or switch shaft having a certain operating range from a normal position and a secondary no normal element or switch shaft having an operating range extending over part of said certain range, the arrangement being such that the primary element returns to normal after being set and if it has been moved into the operating range of the secondary element first causes that element to take up an initial position and then positions it in accordance with its own setting. The invention is described for the remote control of radio receivers by inductive impulses transmitted as described in Specification 531,187, [Group XXXIX]. The control arrangements at the receiver comprise an impulse receiving coil 6, Fig. 7, amplifying valves 59, 60, a double diode 64 for impulse frequency discrimination and volume limitation as described in Specification 521,589, and a gas-discharge impulse-repeating tube 66 as described in Specification 521,941. The impulse trains comprise a second or third long impulse if it is desired to decrease or increase the volume, the extent of control being in accordance with the duration of the impulse. Subsequent impulses step wipers 55 ... 57 to select tuning inductances and padding condensers. The first three impulses are repeated by tube 66 to stepping magnet 72 and holding magnet 73 which steps switch 25 alone. In positions 2 and 3 a motor 92 is energized to drive the volume control 54 in one direction or the other as long as the switch is maintained in that position by the impulse. After the third impulse, the shaft of switch 25 picks up the shaft of switch 55 ... 57. Muting. During tuning operations, switch arm 25 connects ground to the audio-frequency input of valve 34 and contacts 102 disable the oscillator section of valve 30. Specifications 531,189 and 531,190, [both in Group XXXIX], also are referred to.
Patent GB-440562-A (GB)
Title: Improvements in hydraulic presses
IPC: A61C13/00
Filed: 1934-06-27
Abstract: 440,562. Stamping; making dental plates. OBEL NACHF. GES., H., 4, Schnackenburgstrasse, Friedenau, Berlin. June 27, 1934, No. 19013. Convention date, July 1, 1933. [Classes 83 (ii) and 83 (iv)] A press for producing articles such as dental plates has means whereby pressure may be applied to a mould in opposite directions simultaneously or in one direction only. A piston b works in a hydraulic cylinder b<1> and a flexible cover d backed by hydraulic pressure is positioned on a head c. A rigid crosshead m can be swung about a post l to form a rigid abutment. The mould f is rough pressed between the parts m, b, and the crosshead m is then swung to an inoperative position and the dental plate pressed between the cover d and a matrix supported by the piston b for the final pressing. The bore of the head e is of smaller diameter than the piston b to provide a locking force before pressure is applied to the head e. Specification 1662/97, [Class 83], is referred to. The Specification as open to inspection under Sect. 91 comprises also a press without the crosshead m. This subject-matter does not appear in the Specification as accepted.
Patent GB-166446-A (GB)
Title: Improvements in or relating to electric pushes
IPC: H01H13/14
Filed: 1920-07-06
Abstract: 166,446. Graham, E. A. July 6, 1920. Push-button switches; contacts; bases, boxes, and cases.-Push switches consist of stationary contacts e, e<1> mounted on a two-part insulating base c, c', which is contained within a metal casing b with a back plate a, the movable contact h being carried by a spindle k which passes through the casing b a coiled spring r being interposed between the casing and a dished cover p carried on the end of the spindle k. The cover p moves axially over the casing when it is depressed. The insulating base is formed in two parts c, c<1> secured together by a central screw d, each part having semi-circular grooves on its inner face forming passages g, g<1> for the leads f, f<1>, which pass through holes g<2>, g<3> in the plate c', to be clamped under the screws e, e<1>. The base c, c<1> may be formed at c<2>, c<3> to project through the side of the casing at the point of entry of the leads, and is retained in position by internal ridges or indentations s of the casing v. The self-adjusting contact h is loosely mounted between insulating washers i, i<1> on a reduced part of the spindle k. Alternatively, the washers i, i<1> may be of metal, Fig. 6, the stationary insulated contact consisting of a dished metal plate e<3> secured to the screw d. Fig 5 shows a modification, in which three stationary contact screws e, e<1>, e<2> are employed, one of which may be connected to earth.
Patent GB-733905-A (GB)
Title: Improvements in flow meters
IPC: G01F1/22
Filed: 1953-07-09
Abstract: 733,905. Flowmeters. KROMSCHRODER AKT.-GES., G. July 9, 1953 [July 14, 1952], No. 19076/53. Class 69 (1). In a liquid or gas flow meter of the cone and float type, several floats of different size and/or weight are so arranged that a different float is operative over each of various ranges of measurement. In one form Fig. 1, a main tapered transparent metering tube 1 is fitted with a float 2 which itself is transparent and tapered and forms a metering tube for a float 4. Both tubes 1, 2 are calibrated and the tube 2 has an external flange 5 which abuts a sealing-ring 3 in the lower part of the tube 1. A small rate of flow through the meter merely raises the float 4 in the tube 2 to a position indicating the rate of flow, whilst a greater rate of flow raises the float 4 until it closes the aperture in the top of the tube 2 and thereafter raises the float 2 in the tube 1 to a position indicating the rate of flow. A central guide-rod for the floats may be fitted. In another form, Fig. 3, the transparent tube 1 is cylindrical and contains a body 10 having a cylindrical inner surface and an upwardly tapered outer surface. An upwardly tapered guide-rod 8 having a circular cap 9 is arranged within the body 10. Ring-shaped floats 11, 12 are arranged surrounding the rod 8 and body 10 respectively. The method of operation is similar to that described above, the float 11 indicates low, and float 12 high, rates of flow. A further form similar to that shown in Fig. 3 is described but the inner surface of the body 10 is tapered downwardly and the rod 8 and float 11 are replaced by a simple float operating in the central tapered space of the body 10.
Patent GB-1446507-A (GB)
Title: Electrode for plasma arc working of conductive materials
IPC: H05B7/08
Filed: 1974-05-01
Abstract: 1446507 Arc electrodes VSES NI PROEKTNO - KONSTRUKT I TEKHNOLOGICHE INST ELEKTROSVAROCH OBORUDOVANIA 1 May 1974 19190/74 Heading H5H A non-consumable arc electrode 5 has a refractory metal core 1 provided with an enclosed space 3 located in the vicinity of its arcing surface 2 and arranged substantially symmetrically relative to longitudinal axis of the electrode, the space 3 containing material 4 which stimulates electron emission. The complete enclosure of the emissive material 4 is stated to ensure constant arc characteristics throughout the operation of the electrode 5. The core 1 is preferably tungsten and the emissive material 4 comprises one or more oxides of elements of the lanthanide or actinide series, oxides of alkali and alkali-earth metals, and oxides of the III and IV groups of the Periodic System. Specific emissive materials are barium oxide, calcium oxide, yttrium oxide, thorium oxide, cerium oxide and lanthanum oxide. The non- consumable electrode 5 is shown mounted in a reverse polarity plasma torch. When used in a straight polarity plasma torch (Fig. 3, not shown) the core 1 containing the enclosed emissive material 4 is mounted in electrodes 5 so as to be proud of its end surface. The core 1 is manufactured by filling a diamond drilled blind hole in a tungsten blank with emissive material, compressing the emissive material until it occupies <SP>3</SP>/ 5  the depth of the blind hole, filling the remainder of the hole with an excess of tungsten powder and 2% by weight of emissive material, pressing the mixture so that it still projects somewhat beyond the end face 2 of the core 1, and finally fusing the end surface of the core 1 with an argon shielded arc torch to completely enclose the emissive material 4. The diffusion of the material 4 through the core material to the end face 2 during operation of the electrode is stated to control the evaporation of the emissive material from the surface 2 and thereby prevent uneven erosion of the emissive material.
Patent GB-747328-A (GB)
Title: Improvements relating to refrigerator evaporators
IPC: F25B39/02
Filed: 1954-06-30
Abstract: 747,328. Making refrigerant evaporators; metals, rolling. GENERAL MOTORS CORPORATION. June 30, 1954 [July 8, 1953], No. 19201/54. Classes 83 (2) and 83 (4). [Also in Group XIII] Two metal plates 24, 26 are superimposed with a pattern 28 of stop-weld material, corresponding to the eventual refrigerant passages, between them and are then passed between two heated rollers which weld the plates together. Fluid-pressure is then applied between the plates, while they are supported between two rigid flat surfaces, to dilate the passages. The plate, now in the form shown in Fig. 4, is bent to the form shown in Fig. 1 to provide a boxlike evaporator 14. Those parts of the composite plates which will ultimately be vertical are provided with networks of passages 38, 40 which act as refrigerant accumulators and also provide tortuous passages for the refrigerant. The stop-weld material is a water suspension of colloidal graphite, ground oyster shells and sodium silicate.
Patent GB-531320-A (GB)
Title: Improvements in or relating to safety razors
IPC: B26B19/34
Filed: 1939-07-01
Abstract: 531,320. Power-operated shavers. FAIREY, C. R. July 1, 1939, No. 19215. [Class 131] A safety razor such as described in Specification 510,348 is driven by a water motor, such as the Pilton wheel c mounted in the body a of the razor which is provided with ducts o, p for leading the water to and from an axially-directed offset jet n. The cutter g of the rotary helical blade type, is driven by gearing k on a shaft f mounted in water-tight bearings j, h, and driven in turn by the bevel gearing d, e. The gearing employed for driving the rotary cutter may be peg gearing as described in Specification 518,942, [Group XXIV]. Preferably the water supply pipe o passes through the exhaust pipe p.
Patent GB-314096-A (GB)
Title: Improvements in and relating to light-sensitive discharge apparatus
IPC: H01J40/00
Filed: 1929-06-22
Abstract: 314,096. British Thomson-Houston Co., Ltd., (Assignees of Koller, L. R.). June 22, 1928, [Convention date]. Vacuum tubes.-A discharge device has a cathode 2 emitting electrons at a dull-red temperature, an anode 3, and a control electrode 5 consisting of a monatomic film of light-sensitive material, for example an alkali metal, such as caesium or rubidium deposited in the form of a band on an elongated glass or quartz envelope between the cathode and the anode. The electrode 5 may be formed by depositing a film of silver chemically or electrically, and heating a mixture of caesium dichromate and silicon in a capsule 6, caesium being deposited on the film of silver and excess of caesium being removed by evacuation. The electrode 5 should be arranged as far as possible from the cathode. The cathode consists of a nickel or platinum filament coated with alkaline earth material such as oxide for example by applying a paste of barium hydroxide, nitrate or resinate and heating to 800‹C. Several such layers or alternate layers of barium and strontium oxide may be superposed. The outside of the envelope may be painted black, and light may be admitted through a slot or circular opening in the electrode 5. The device may be used for controlling a relay through a thermionic valve. Specification 303,476 is referred to.
Patent GB-653036-A (GB)
Title: Improvements relating to electrically-driven centritugal spinning, twisting and likemachines
IPC: H02P3/06
Filed: 1948-07-17
Abstract: 653,036. Textile centrifugal spinning &c. machines. PRINCE-SMITH & STELLS, Ltd., and FEATHER, E. E. July 17, 1948, No. 19248. [Class 120(ii)] [Also in Group XXXVII] In order that a centrifugal spinning, twisting or like machine having automatically elevatable bobbin carriages may operate without supervision for a period, followed by automatic unwinding and stopping, the machine is provided, in the main power circuit, with an adjustable make- and-break contact mechanism in series with one or more normally open switches, preferably operated by the bobbin carriages when they rise to unwinding position. Bobbins B, B<1> are elevated into the spinning pots A, A' for unwinding the yarn from the pots in known manner and, as each line of bobbins rises, strikers D, D' close switches E, E<1>. When both switches are closed, a heater coil O, encircled by a bi-metallic strip P, is energized, consequent upon which an actuator arm K moves to operate the make and break contact to stop the machine (see Group XXXVII). The extent of movement of the arm K may be varied in accordance with the length of time that it is desired should elapse before the machine stops.
Patent GB-721027-A (GB)
Title: Improved apparatus for heating the lubricating oil of internal combustion machines
IPC: F01M5/00
Filed: 1953-07-10
Abstract: 721,027. Cooling cylinders. BAYERISCHE MOTOREN WERKE AKT.-GES. July 10, 1953 [July 12, 1952], No. 19248/53. Class 7 (2). [Also in Group XXXIV] Lubricating oil for internal combustion engines is heated rapidly by being passed through or within a hot part of the engine, for example, the cylinder head, walls or base, or adjacent the exhaust port. A thermostatic control is provided to short circuit the passage through the hot part. As shown, bores 3 are provided under the exhaust port 1 in the cylinder head 2 for passage of the lubricating oil until it reaches a prescribed temperature.
Patent GB-1294022-A (GB)
Title: Mercury vapour lamp
IPC: H01J61/52
Filed: 1970-04-22
Abstract: 1294022 Metal-vapour lamps COMPAGNIE ELECTRO-MECANIQUE 22 April 1970 [28 April 1969] 19272/70 Heading H1D A mercury-vapour lamp doped for example with InI is adapted to operate vertically and is cooled so that the upper portion of the arc tube 1 disposed inside a transparent envelope 3 is cooler than the lower portion to prevent the dopant from settling out. The temperature difference is aided by having a larger heat exchange area per unit height and a thinner annular space inside the envelope at the top of the arc tube. In further embodiments the arc tube may be of uniform cross-section and the temperature difference aided by the use of an envelope of non-uniform diameter or by providing additional means to cool the upper portion of the arc tube, e.g. a flow of cooling gas.
Patent GB-659996-A (GB)
Title: Improvements in and relating to electric valve control circuits
IPC: B23K11/24
Filed: 1947-07-18
Abstract: 659,996. Electronic control circuits for intermittently energized loads. BRITISH THOMSON-HOUSTON CO., Ltd. July 18,1947, No. 19340. Convention date, July 22, 1946. [Class 38 (iv)] A control system for one or more discharge devices, such as thyratrons or ignitrons 17, 18, interconnecting a resistance welding transformer 4, or like intermittently energized load, and an alternating current supply circuit 8, 10 comprises (1) means for impressing on the control element 20 of the discharge device that which is the more negative of two control voltages, one being either a negative unidirectional bias voltage or an alternating " hold-off " voltage in phase opposition to the anode-cathode voltage of the device and the other being a sinusoidal voltage of adjustable phase; and (2) means for rendering ineffective the bias or " hold-off " voltage for a predetermined number of half-cycles of supply voltage. In the system shown, the hold-off voltage is provided by the secondary-winding 26 of a transformer 27 energized from the supply circuit, from which the sinusoidal voltage is also obtained by phaseshift circuit 13, 33-37 and transformer 30. The outputs of transformers 27, 30 are mixed in a diode 23 which passes to the control element 20 the more negative of the two voltages. The tapped inductive element 13 of the phase-shift circuit may have a secondary winding for supplying the heaters of the various control valves. The means for rendering the hold-off bias ineffective comprises a normally non-energized oscillatory circuit 39-41 tuned to the supply frequency and which, upon energization, injects, by means of a transformer 25, into the control element circuit of the discharge device a voltage opposing that of transformer 27. Energization of the oscillatory circuit is effected by reduction of hold-off bias on a normally non-conducting valve 44 resulting upon conduction of a further valve 53 (from across which the bias is obtained) upon closure of an initiating switch 65 controlling the phase of the excitation voltage of the last-named valve. Valve 44 then conducts on alternate half-cycles of the supply voltage, thereby shocking the oscillatory circuit into oscillation and maintaining the amplitude of oscillation. The discharge devices consequently conduct, the ignition point in each cycle being determined by the phase of the sinusoidal control voltage. Abrupt termination of the oscillatory condition and, consequently, of the supply of power to the load, results upon conduction of a valve 48 which occurs upon the eventual discharge of a condenser 70 forming part of a grid bias and timing network 70-75 energized by the voltage across valve 53. Conduction of valve 48, in effect, short-circuits the capacitative element 41 of the oscillatory circuit and modifies the connection of the inductive elements 39, 40 from " series aiding " to " parallel opposition," so that no " turn-on " voltage is then induced in the secondary windings 24 of transformer 25.
Patent GB-729660-A (GB)
Title: Improvements relating to flow indicators
Inventor: FOWLER HENRY
IPC: G01P13/00
Filed: 1952-07-31
Abstract: 729,660. Rotary flow indicators. TORKING- TON ENGINEERS, Ltd., and DUKES, A. I. July 27, 1953 [July 31, 1952], No. 19373/52. Class 110 (2). [Also in Group. XXIX] A liquid or gas flow indicator comprises a transparent tube, connected in the straightthrough flow line and a cylindrical rotor having a scroll on its curved surface mounted within the tube and visible through the transparent walls thereof. As shown, the transparent tube 5 is mounted in a casing 2 having windows 4 and jewelled bearings 10 for the rotor 11 are mounted on pins 9 secured to end-pieces 8 bridging the tube. The scroll 12 may have one or more starts and may be mounted or cut on the rotor.
Patent GB-927941-A (GB)
Title: Teaching device, particularly for teaching drawing
IPC: A47B97/02
Filed: 1960-06-01
Abstract: 927,941. Stands. C. E. KAESTLE. June 1, 1960 [June 9, 1959; March 9, 1960], No. 19435/60. Class 52 (3). [Also in Group XV] A stand for supporting an object used in teaching drawing comprises a column 4 secured by a socket to feet and an object support which can be fixed at any height by means of a socket 6 and pressure screw 7. The object support which is at least in part transparent has as shown iron rods 8-10 to hold a sheet of glass or other transparent material on which is traced a rectilinear grid. A vertical grid which may be curved is also provided.