baber/WOPTO huggingface dataset:
Patent GB-377077-A (GB)
Title: Process for the production of xanthates
IPC: C07C329/00
Filed: 1931-12-14
Abstract: Xanthates are produced by reaction of carbon bisulphide with the metal alcoholates of secondary or tertiary monohydric alcohols. Preferably, an alkali metal alcoholate is used, the equivalent hydroxide being first dissolved in water or in the secondary or tertiary alcohol.  The reaction between a secondary alcohol, carbon bisulphide, and potash solution proceeds with evolution of heat, and the hydrated xanthate crystallizes out on cooling to room or lower temperature.  To obtain the anhydrous xanthate, the alcoholic alkali should be used.  In preparing xanthates of tertiary alcohols, it is preferred to grind the metal hydroxide to a fine powder before adding it to the tertiary alcohol, or to dissolve the finely divided metal in the alcohol. Carbon bisulphide is then added, and the mixture refluxed at the boiling point for some time.  On cooling, the xanthate may be filtered off.
Patent GB-343085-A (GB)
Title: Improvements in and connected with ventilating installations, particularly those adapted for use on railway and like vehicles
IPC: B61D27/00
Filed: 1929-11-13
Abstract: 343,085. Air filters; vacuum cleaning- apparatus. STONE & CO., Ltd., J., Deptford, and VIDAL, J. F. B., 18, Brandram Road, Lewisham, both in London. Nov. 13, 1929, No. 34680. [Classes 8 (i) and 8 (ii).] In a ventilating installation for railway vehicles &c. a filter e is provided in the intake and is cleaned by a suction head k rotatable over the outer surface, the suction producing and the driving means being located on the inner side and connected to the head k by a hollow shaft n. The filter is circular and its periphery is secured to the end wall of the coach by a clamping ring h; it is seated on a ring g supporting a central ring g<1> by arms. The hollow shaft rotates on ball bearings q within a dust tight casing o supported by a bracket p. The shaft and a bent tube m connecting it to the head are formed with flanges n<1>, ml embracing the inner edge of the filter and the ring g<1>. The shaft is driven by bevel wheels t, y from a driving shaft z. The interior of the casing o, and the end of the hollow shaft n are open to a suction pipe v. A brush 1 may be secured to the suction head to disturb the dust. An external shield may protect the filter. The shaft z may be driven from the suction fan to which the pipe v leads. Alternatively separate motors may drive the fan and the shaft n; the shaft motor being mounted on the casing o or otherwise. A pump may be substituted for the fan. A vacuum cleaning installation may in addition be operated from this pump or fan. According to the Provisional Specification the suction head may be reciprocated or oscillated.
Patent GB-1472256-A (GB)
Title: Tape reel
IPC: G01B3/10
Filed: 1973-07-20
Abstract: 1472256 Tape measures RABONE CHESTERMAN Ltd 8 July 1974 [20 July 1973] 34696/73 Heading G1M The hub of a tape measure reel is secured to an inner tape measure and is journalled in a tape casing and has two secured together, telescopic, interengaged parts. The hub shown, Fig. 2 has two telescoping plastics parts 15, 16 held by screw 17 at the required width against thrust rings 20, 21 on casing 10. The hub parts have, Fig. 3, telescoping skirt portions and post parts 24, 25 for anchoring an inner tape end, and also projections 26 locatable in recesses 27. Part 15 includes a recess for a handle hinged by a pin in recesses 34. Blade spring 37 held by screw 17 biases the handle open or closed. Casing 10 is made in two abutting parts and tape, which may be of linen, extends through a frame 11, Fig. 1, carrying two rollers. The tape end has  metal loop 13 and toothed flap 14 extendable at right angles to the loop to form a measuring datum. The casing may have a flexible handle secured to two diametrically opposed studs.
Patent GB-490455-A (GB)
Title: Improvements in forced-flow steam and other vapour generators
IPC: H01T1/00
Filed: 1936-12-18
Abstract: 490,455. Forced - flow steam boilers. BABCOCK & WILCOX, Ltd. Dec. 18, 1936, No. 34789. Convention date, Dec. 18, 1935. [Class 123 (ii)] In a forced-flow boiler, a number of long small-bore parallel connected tubes 206 extend horizontally and upwardly around a furnace chamber and discharge into a separator 232, and each tube extends across the furnace chamber to form part of a bank 228. The tubes are connected to the inlet header 204 through resistors, as described in Specification 490,459, and are first bent to form flat coils extending the full length of the floor of the furnace chamber. The front ends 211 of the coils are bent upwards and connected to enlarged diameter sections extending along the side walls of the furnace chamber and across the back, and the sections are then bent upwards and backwards and forwards to form flat coils lining the roof of the chamber. The furnace gases flow upwards over the tube bank 228 into a return flue space 245, from which the gases flow forwards over a superheater 242, a feedheater 203, and through the tubes of an air heater 282. The superheater and feedheater are formed of superposed horizontal sinuous tubes each having a part across the gas flow and a part lining the sides of the gas path. Specification 490,454 also is referred to.
Patent GB-1395948-A (GB)
Title: Synchronous machines
IPC: H02K51/00
Filed: 1972-07-25
Abstract: 1395948 Transmitting mechanical power KAWASAKI JUKOGYO KK 25 July 1972 [29 July 1971 2 Nov 1971] 34789/72 Heading H2H A synchronous machine comprises an electromagnetic coupling 3 including a rotor 4 driven by a prime mover 1 and a rotor 5 for driving a load 2, a speed control device 11 for varying the speed of the prime mover, and a circuit 26, 33 for supplying current to the field winding (22), Fig. 1 (not shown), of an electric motor 8, the energization of the field winding and the operation of the speed control device to reduce the speed of the prime mover occurring within a period of three seconds to obtain synchronism of the rotors. The coupling 3 is similar to that described in Specification 1,303,117 but includes a damping winding (not shown) which enables asynchronous rotation of the rotors prior to the energization of the field winding. The rotor 4 is provided with a field winding (24) and slip rings 6 connected to a D.C. source via a switching device 10, and the rotor 5 has an armature winding (25) and slip rings 7 connected with an armature winding (23) of the motor 8 via a phase interchanging switch 9 which enables the rotors to rotate in the same or opposite directions. To synchronize the rotors, a source of A.C. or D.C. is supplied to the field winding (22) via the device 26 which may comprise controlled rectifiers. The speed control device 11 may control the supply of steam, fuel or current to the prime mover 1 depending on whether the prime mover is a steam turbine, an internal combustion engine or an electric motor. The device 11 is controlled simultaneously with the device 26 to synchronize the rotors.
Patent GB-188253-A (GB)
Title: An improved cap for colliery tram wheels and the like
IPC: B61F15/22
Filed: 1921-12-28
Abstract: 188,253. Heys, J., and Davies, J. Dec. 28, 1921. Hubs.-A cap for the hub of a wheel comprises a cylindrical member 4 with an annular groove 6 in its periphery, adapted to register with a slot or slots 7 in the hub or boss, the said cap and the hub or boss being adapted to be interlocked by a cotter pin or pins 8 or the like, located within the registering slots. When screw bolts and nuts, or headed pins or rivets are used in place of the cottar pins 8 the boss, adjacent the holes 7a which form a continuation of the groove 7, may be formed with lug-like parts 5<a> providing flat bearing faces for the rivet or bolt heads.
Patent GB-1192569-A (GB)
Title: Substituted Peroxides Containing a Substituent Positioned at least Beta to a Carbonyl Carbon Atom
IPC: C07C409/42
Filed: 1967-08-01
Abstract: 1,192,569. Substituted alkanoyl peroxides. WALLACE & TIERNAN Inc. 1 Aug., 1967 [1 Aug., 1966], No. 35377/67. Heading C2C. The invention comprises alkanoyl peroxides, said peroxides having at least 3 carbon atoms in one alkanoyl portion, and at least one substituent " sub " which is positioned on a carbon atom which is separated from the carbonyl carbon atom by at least one other carbon atom, the " sub " being selected from R 2 SO 2 -, R 3 SO-, R 4 OOC-, R 5 COO-, and (R 6 ) 2 PO, where R 2  and R 3  are aliphatic, cycloaliphatic, or aromatic, R 4  is aliphatic or cyclo-aliphatic, and R 5  and R 6  are aliphatic, cycloaliphatic, aromatic, alkoxy or mercapto. The peroxides may be symmetrical or asymmetrical, and are prepared by reacting an acid chloride or anhydride with hydrogen peroxide in the persence of aqueous alkali, tertiary amine or pyridine.
Patent GB-211644-A (GB)
Title: Improvements in taps or valves
IPC: F16K3/26
Filed: 1922-12-29
Abstract: 211,644. Shaw, H. S. Hele-, and Livsey, H. Dec. 29, 1922. Materials, special.-In a valve of the kind in which a cylindrical plug moves into and out of a seating of flexible material, the plug, which may be solid or hollow, is made of porcelain, glass, earthenware or other material having a glazed or enamelled surface. In the case of a hollow plug, lateral perforations are provided. The body of the valve may be made of a composition such as vulcanized rubber, to which the seating rings are vulcanized. A porcelain outlet and guide for the spindle may be used. The seating rings may be of rubber vulcanized to a less degree of hardness than the casing. Specification 210,530 is referred to.
Patent GB-640688-A (GB)
Title: Explosion turbine plant and method of operating same
IPC: F02C5/12
Filed: 1947-12-31
Abstract: 640,688. Gas turbine plant. FRANCIS, E. L. M. (Inffeld, K. L. G. M. von.). Dec. 31, 1947, No. 35434. [Class 110(iii)] In a gas turbine plant gases generated in explosive chambers 9, 10, the timing of which is determined by a separatelydriven constant speed shaft, are delivered through valves 5 to high-pressure turbines 1, 2 of the Curtis type and pass to a dual flow drum type turbine 3 providing useful power for the generator 12. The turbines 1, 2 drives multi-stage compressors for the combustion air and blast furnace gas which is used as fuel. The plant is regulated by varying the shaft speed of the turbine 1 by means of a speed-governor 7<SP>1</SP> and the compressors 13, 14 for the combustion air operate according to the law # P/ PO  = # V. In a modification, the scavenging air is provided by a separate turbine-compressor set 17, 18 and the regulation of the plant is effected by varying the speed of this set, the compressors operating according to the same law. One scavenging air set may be associated with more than one gas turbine plant. The scavenging-air turbine may be driven by steam generated by the exhaust gases from the power turbine 3 and its exhaust may be superheated also by the exhaust gases and then used in a condensing turbine. When the scavenging- air turbine set is used for starting the plant, it is energized by compressed-air from storage and the compressed-air from the compressors 13, 14 is used in starting nozzles in the turbines 1. 2. Regulation of the plant can also be effected by varying the nozzle area of the low-pressure turbine and by varying the speed of the timing shaft associated with the explosion chambers. Specification 377,092 is referred to.
Patent GB-1193430-A (GB)
Title: Improvements in or relating to Presses
IPC: B30B15/18
Filed: 1966-08-08
Abstract: 1,193,430. Hydraulic presses. ULSTER CHIPBOARD CO. Ltd., and G. SCHIFF. 7 Aug., 1967 [8 Aug., 1966], No. 35438/66. Heading B5F. A press, e.g. for making panels of predetermined thickness is provided with adjustable means for controlling the distance between a head 8 and table 9, comprising a stop positioned on an axial extension 17 of a ram 12 for abutment with the adjacent end of a cylinder 13 of the ram. The stop may comprise nuts 19, 20, adjustment being effected either by moving the nuts or by means of spacers 24. The spacers 24 may be in a plurality of sections to facilitate replacement. Walkways 21 may be provided for ready access to the nuts 19, 20. Alternatively the nuts may be adjusted by remote control using a motor or motors and chain and sprocket or shaft drive.
Patent GB-787339-A (GB)
Title: Improvements in safety cut off devices for hydraulic pressure systems such as fluid-operated brakes
IPC: B60T17/22
Filed: 1954-12-08
Abstract: 787,339. Hydraulic brakes. DARQUIER, J. J. Dec. 8, 1954, No. 35539/54. Class 103 (1). [Also in Group XXIX] A safety cut-off device for hydraulic brake systems comprises a valve body 1 with an inlet 2 for connection to a supply pipe, outlets 4 for connection to branch pipes to the brake cylinders, and branch ducts 3 connecting the inlet to each of the outlets, and one or more valve members 5 normally positioned intermediate the openings of the ducts 3 into the outlets 4 and longitudinally displaceable upon a loss of pressure in any one of the outlets to close the duct opening into the said outlet, the valve member or members each being normally retained in its intermediate position by retaining means comprising a spring-loaded stem 6 movable transversely to the valve member in a cavity 10 open to the outlet 4 via a duct 11. Fig. 1 shows a single valve member in the form of two opposed truncated cones joined at their narrow ends to form a throat 5<SP>1</SP> which is engaged by a metal ball 8 in contact with the stem 6. This stem is guided in a cavity 10 connected to the outlets 4 by passages 11. When the valve member 5 is displaced in either direction, the stem 6 rises and completes an alarm circuit A through a springy contact 12 supported by an insulated member 7. In a modification, two valve members both of truncated conical form are provided and the inlet 2 is permanently connected to the space between them. The valve member or each of them may be locked in position by the longer portion 16 of a screw 15, Fig. 3, having long and short portions separated by a fixed head. The short portion 16<SP>1</SP> of the screw is used to block the aperture 18 in the valve body when the device is operative. The valve member may engage sharp edged seat members 21, Fig. 5, mounted in plugs 19 screwed into the outlets 4.
Patent GB-498556-A (GB)
Title: Improvements in and relating to methods of preparing luminescent materials
IPC: C09K11/59
Filed: 1937-12-23
Abstract: 498,556. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 23, 1937, No. 35667. Convention date, Dec. 30, 1936. [Class 98 (i)] Luminescent materials which may exhibit fluorescence or both fluorescence and phosphorescence are prepared by mixing a metal compound, an organic silicate, and an activator in a liquid medium, removing volatile constituents to form a gel, drying, grinding, and firing the product. For example, an organic silicate such as ethyl silicate is mixed with zinc nitrate in an alcoholic solution containing a small quantity of hydrochloric acid, and a small quantity of manganese nitrate is added. The mixture is heated to form a friable solid which is then crushed and heated to 110 to 140‹ C. to remove the volatile matter, ground, reheated to 350‹ C., reground, and fired at 1000 to 1300‹ C. The proportions used may be varied between equimolecular quantities of ZnO and SiO2 and equivalent quantities. In place of ethyl silicate, methyl, propyl, or amyl silicate may be used and the zinc salt may be replaced wholly or in part by salts of magnesium, cadmium, or beryllium. Specification 457,126 is referred to. The Specification as open to inspection under Sect. 91 describes also the use of mixtures in which one of the constituents is in the form of a colloidal gel. This subjectmatter does not appear in the Specification as accepted.
Patent GB-845543-A (GB)
Title: Improvements relating to electrically-operated changing display indicators
Inventor: HAILEY ALBERT MARTIN
IPC: G05D3/12
Filed: 1957-11-18
Abstract: 845,543. Indicators for electric selective systems. SIEMENS EDISON SWAN Ltd. Nov. 6, 1958 [Nov. 18, 1957], No. 35858/57. Class 40 (1). In an indicator of the kind in which one of a series of letters or numbers can be displayed by moving a chain of display slats 3-12, Figs. 2, 3, to a selected position by the earthing of certain ones of a number of parallel lines, each line has a switch, the switches being controlled during movement of the chain by coded projections on the edges of the slats so that in each different stopping position of the chain, a different combination of switches is opened, the chain being driven until the switches in all earthed lines are open. The chain of slats passes round sprocketwheels 13, 14 on axles 15, 16. Wheel 14 is driven through a gear-train and a Geneva gear by a motor 19. The switches each consist of a contact finger 27-31 held spaced apart by an insulating clamp 32 at the lower end and biased into contact with a contact-bar 34. As a slat passes round sprocket 14 it assumes a vertical position so that its coded edge engages the contact arms and lifts certain ones out of engagement with the bar 34. As shown in Fig. 4, the selector lines 38-41 are earthed by contacts 46-49 of selector relays. The mechanism is driven by motor 19 until the contact 27-30 in every earthed line is opened, the selected numeral then being presented at the display position. A fifth line when earthed by resetting switch 52 causes the mechanism to be driven to the initial position, in which position contact 31 is opened by a projection 37 on slat 5. To allow the motor to be energized between stopping positions a cam 50 rotating with sprocket 13 may close contact 51. The motor 19 may run continuously, driving the shaft 16 through a clutch controlled to display the required numeral by a solenoid and provided with a latching arrangement for accurately locating the slats. A number of indicators may be associated with the same driving motor. Specifications 721,683 and 845,542 are referred to.
Patent GB-467996-A (GB)
Title: Improvements in or relating to carrier wave modulator arrangements
IPC: H04N5/40
Filed: 1935-12-27
Abstract: 467,996. Valve modulating systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and COCKERELL, C. S. Dec. 27, 1935, No. 35866. [Class 40 (v)] In a modulator arrangement the carrier frequency amplitude is varied substantially rectilinearly with modulation input by means of gain control potentials in dependence upon modulation superimposed upon gain control potentials dependent upon output. In the Figure the carrier frequency is applied across the input impedance 1 of the carrier frequency amplifier 3. The voltage developed across impedance 5 is applied to a diode 7 in series with an impedance 10 and D.C. source 11 ; the negative terminal of the source being earthed. The voltage from the diode anode to earth is taken through a filter 12 passing all frequencies up to the carrier and rejecting the carrier and higher frequencies and is applied in series with the impedance 1. Modulation is applied between the diode cathode 9 and earth. In the absence of modulation the resulting gain control potential is sufficiently negative to reduce the gain of the amplifier to less than one half its maximum value. When modulating potentials are superimposed substantially rectilinear modulation is obtained up to a high percentage modulation. The output energy from the amplifier may be taken by any means, such as inductive coupling or by radiation from an aerial. Specifications 421,013 and 421,504 are referred to.
Patent GB-793921-A (GB)
Title: A process for working up products containing the alkali metal salts of terephthalic acid
IPC: C07C51/42
Filed: 1956-11-23
Abstract: Products containing an alkali metal salt of terephthalic acid are worked up by reacting said salt, in the presence of water, with an alkaline earth metal salt of an aromatic carboxylic acid, whose salts are capable of thermal re-arrangement into salts of terephthalic acid and so obtaining an alkaline earth metal salt of terephthalic acid. The alkaline earth metal salt may be prepared in situ from the alkaline earth metal hydroxide or carbonate in admixture with a free aromatic carboxylic acid or its anhydride. Suitable aromatic carboxylic acids are benzoic acid, isophthalic acid, orthophthalic acid or tri- and hexabenzene carboxylic acids. The process is preferably used for solutions of sodium or potassium terephthalate and the alkaline earth metal salt used is preferably the calcium salt although the corresponding salts of barium and strontium with aromatic carboxylic acids may also be used.  The products containing alkali metal salts of terephthalic acid should contain not more than 20 per cent by weight and preferably below 10 per cent by weighr of aromatic carboxylic acids, other than those of the unreacted starting materials.  The concentration of the alkali metal salts of terephthalic acid in solution, should be at least that in which the limit of solubility of the alkaline earth metal salt of terephthalic acid is exceeded at the selected operating temperature.  Excess alkaline earth metal salts of aromatic carboxylic acids may be used. Suitable reaction temperatures are from about 10 DEG  C. up to 150 DEG  C., preferably 70-120 DEG  C.  The precipitate of alkaline earth metal salts of terephthalic acid in a solution of alkali metal salts of the remaining aromatic carboxylic acids, may be cooled and separated in a known manner, and the salt obtained from the filtrate re-arranged to terephthalic acid.  Terephthalic acid may be obtained from the alkaline earth metal salt, by treating the latter with an acid which forms soluble alkaline earth metal salts, e.g. hydrochloric acid, nitric acid, carbonic acid, formic acid or acetic acid.  This step may be carried out directly on the filter, or by suspending the alkaline earth metal terephthalate in water and adding the acid, or by adding the terephthalate to the acid.  The latter two steps may take place between 10 DEG  and 120 DEG  C. and preferably at such concentrations that the alkaline earth metal salts which are formed, dissolve completely in the water present in the reaction mixture.  When using carbonic acid it is preferable to work at excess pressure, e.g. 50 kg/cm2 pressure of carbon dioxide.  The free terephthalic acid so produced may be further purified by known methods.  Examples are given of the treatment of crude dipotassium terephthalate with (1) commercial calcium hydroxide and phthalic anhydride; (2) calcium hydroxide and isophthalic acid; (3) calcium benzoate.
Patent GB-1401007-A (GB)
Title: Sleeves for gramophone records
IPC: B65D85/57
Filed: 1971-07-30
Abstract: 1401007 Gramophone record sleeves N J GARROD 13 Oct 1972 [30 July 1971] 35965/71 Heading B8P A record sleeve comprises two panels 1 and 4, panel 1 having spines 2 along three edges carrying marginal flaps 3 to which panel 4 is adhesively secured there being a further panel 5 secured to the inner face of panel 1 and acting as a stop against which the spines abut. The spines may be secured against the edges of the panel 5 to increase the stiffness of the construction. The fourth edge of the sleeve may be closed by a spine and marginal flaps integral with panel 1 and tucked into the sleeve until the flap abuts the further panel 5.
Patent GB-941379-A (GB)
Title: Polyurethane lacquers
Inventor: LEES DONALD
IPC: C08G18/79
Filed: 1960-10-20
Abstract: Polyurethane lacquers are prepared by reacting a hydroxyl-group-containing compound with an isocyanurate, the isocyanurate being prepared from organic polyisocyanates having at least one isocyanate group attached to an aromatic nucleus and containing not more than 2,5% free polyisocyanate monomer (see C3 Abridgment for preparation).  Solvents or diluents, pigments, fillers, flowing-out agents (nitro cellulose, ethyl cellulose) or urea-for-maldehyde condensates may be added to the lacquer.  They may be applied by spray gun or brush to wood, rubber, metal or fabric. In the examples, typical polyurethanes are flowed on to clean white glazed porcelain tiles and dried in air overnight. Specifications 842,154 and 920,080 are referred to.