baber/WOPTO huggingface dataset:
Patent GB-775873-A (GB)
Title: Improvements in or relating to electric signalling systems employing continuously transmitted carrier or pilot current
IPC: H04J1/14
Filed: 1953-11-06
Abstract: 775,873. Alternating current signal receivers. STANDARD TELEPHONES & CABLES, Ltd. Nov. 6, 1953 [Nov. 12, 1952], No. 30792/53. Class 40 (4). [Also in Group XL (b)] In a signal receiver for alternating current signals (which may be a pilot signal for controlling the transmission level or alternatively a carrier current) in which signalling is effected by increasing or decreasing the current from a normal steady value, a rectifier circuit with a long time constant is used to provide a steady D.C. reference potential and a further D.C. potential derived from a quick-acting rectifier circuit is compared therewith to provide indication of the change in level. A circuit is illustrated capable of responding to downkeying (i.e. reductions in amplitude) due, e.g. to dialling impulses, and also to up-keying (i.e. increases in amplitude) due, e.g. to metering information impulses. The steady A.C. received in transformer I after rectification at WI is fed to a long time constant circuit C1, R1, C3 which blocks the rectifier W2 of a second rectifying circuit having a short time constant. With an increase in signal level however this blocking bias on W2 is overcome and the resulting output passes via condenser C3 to operate relay Z, through its coil ZI, by overcoming the steady D.C. bias fed to its coil ZII. The steady D.C. from rectifier W1 is also fed to the winding WII of relay W, but during the steady state the flux therein is overcome by the opposing flux in winding W1 due to current from a short time constant rectifier circuit W3, W4. When the amplitude of the incoming signal is reduced, however, the flux due to winding WI falls immediately and winding WII takes charge to change the position of its armature. In the case of a carrier system the signalling current may be the carrier itself, in which case the rectifiers W3, W4 may be used for demodulation, the resulting speech signals being taken off the resistor R6.
Patent GB-1106478-A (GB)
Title: A centrifugal pump installation
IPC: F04D9/00
Filed: 1965-07-20
Abstract: 1,106,478. Cooling motors. KLEIN, SCHANZLIN & BECKER A.G. 20 July, 1965 [11 Sept., 1964], No. 30860/65. Heading H2A. Also in Division F1] In an electrically driven centrifugal pump installation having passages 13 in the rotor 7, passages 11 in the wall of a forward bearing support 5 between the rotor and the pump, and a chamber 17 between the forward bearing support and the pump impeller 3, which is connected by at least one bore 18 in the pump casing to the intake 19 of the pump, stationary vanes 21 are provided on the forward bearing support adjacent the rotor so as to co-operate . with projections 20 on the rotor 7 to provide a flow of liquid from the rotor chamber through some of the passages 11 and a flow in the opposite direction of substantially particle free liquid through the remaining passages into the rotor chamber. The projection 20 may be in the form of rivets or screws as may be the fixed vanes 21. The bores 11 in the forward bearing support 5 may be of circular or slot form and equally or unequally spaced from the fixed vanes 21 (Figs. 2 and 3, not shown). The passages 13 in the rotor are in the form of slots. Operation.-The pump is filled with liquid and any trapped air in the rotor chamber 16 is driven by the moving projections 20 to the rear part 14 of the motor and through the passages 13 such that an air bubble collects in chamber 15 around shaft 4. The vanes 21 break this air into an air-water mixture so as to enable it to pass into chamber 17 where the air goes through the ventilating bores 12 and any dirt particles are removed via bore 18 into the stream of liquid conveyed by the pump through intake 19.
Patent GB-260794-A (GB)
Title: Improvements relating to pipe and like connections
IPC: B60C29/06
Filed: 1925-12-07
Abstract: 260,794. Evans, G. A., and Fletcher, R. A. Dec. 7, 1925. Couplings, disconnectible; stuffing-box joints.-In tyre pump connectors &c. of the type in which a rubber sleeve c adapted to fit on the tyre valve is tightened thereon by being compressed by a sliding hollow member d, having integral therewith a tube e for attachment to the pump, the member d is actuated by a lever g provided with an adjustable screw h. Movement of the lever g is limited by engagement of the screw h with a stop formed on the head of a screw i secured to the member d.
Patent GB-824350-A (GB)
Title: Process for the manufacture of a diamine
IPC: C07C209/08
Filed: 1956-10-10
Abstract: N : N-Dimethylethylenediamine is prepared by reacting a b -halogeno-ethylamine or a salt thereof with an aqueous solution of dimethylamine, preferably, when a salt is used, in presence of an acid-binding agent which may be an excess of dimethylamine, an inorganic carbonate or an inorganic base, e.g. an alkali or alkaline earth metal hydroxide or carbonate.  Suitable salts of b -halogenoethylamines are those with hydrohalic acids or sulphuric acid and the preferred temperature range is from 20 DEG  to 40 DEG C. In examples, the hydrochloride of b -chlorethylamine is reacted with aqueous dimethylamine in presence of sodium hydroxide.  Specification 744,996 is referred to.
Patent GB-988253-A (GB)
Title: Production of azoalkanes
Filed: 1961-08-29
Abstract: The invention comprises a -cyano-a 1-substituted azoalkanes of formula <FORM:0988253/C2/1> in which R1, R2, R3 and R4 are like or unlike aliphatic, cycloaliphatic, araliphatic, aromatic, or heterocyclic groups or R1 and R2 taken together with the carbon atom to which they are attached form a cycloaliphatic or heterocyclic ring and A is a group of formula -N3, -O(O)CR6, -O(O)CH, -S(O)CR5, -S(S)CR5, -O(O)COR6, -S(S)COR5, -S(O)COR5, -OR6, -CN, -OCN, -SCN, -SR5, or -OOR6 in which R5 is any of the groups which R1 may represent and R6 is as defined in Claim 1, and when A is -OR6 none of the groups R1, R2, R3 or R4 is an aromatic group, which are prepared by reacting an a -halogen-a 1-cyanoazo-alkane, <FORM:0988253/C2/2> in which X is a halogen atom, with (a) a salt of formula YN3, YCN, YCNO, YCNS, YSR5, R5OC(O)SY, R5OC(S)SY, R5CO.SY and R5CS.SY in which Y is a cation or (b) an excess of anhydrous polar compound R6OH, H.COOH, R6COOH, R6OOH and R6O.C(O)OH under liquid conditions in the presence of an acid acceptor and at a temperature below the decomposition of the azoalkane.  Examples describe the preparation of 2-cyano-21-thio-cyano-2,21 - azopropane, 2 - cyano - 21 - methoxy - 2,21 - azopropane, 2 - cyano - 21 - ethoxy - 2,21-azopropane, 2,21 - di - (cyano) - 2,21 - azopropane, 2 - cyano - 21 - acetoxy - 2,21 - azopropane, 2 - cyano - 21 - formyloxy - 2,21 - azopropane, 2 - cyano - 21 - propionoxy - 2,21 - azopropane, 1 - cyano - 11 - azido - 1,11 - azocyclo - hexane, and 2-cyano-21-t-butylperoxy-2,21-azopropane. The products may be used as polymerization catalysts.
Patent GB-409400-A (GB)
Title: Improvements in television transmission systems
IPC: H04N5/84
Filed: 1932-11-03
Abstract: 409,400. Television. FERNSEH AKT.- GES., Goerz-Allee, Zehlendorf, Berlin. Nov. 3, 1932, No. 31043. Convention date, Nov. 5, 1931. [Class 40 (iii).] In a system for the television transmission of a moving or continuously varying scene using an intermediate photographic record the sensitive layer is scanned before being fixed or after a preliminary fixing process within a short time of the actual photographic exposure. When the scanning is to be effected before the film has been fixed, the sensitive coating may advantageously be blue-sensitive, and a scanning beam of a different colour, e.g. red is used. In the system shown in Fig. 4, a linear source of light 16 is concentrated by a lens 17, which may be provided with a red filter 28, on a slot cooperating with circularly arranged apertures in a scanning disc 18. The scanning beam is concentrated by a lens system 20 on the film 2 carrying the developed or the developed and partially fixed photographic record of the scene, and is focused by a further lens 25 on the lightsensitive coating 26 of a photo-electric cell 27 which is preferably sensitive to red rays. The photo-electric currents may control an ultrashort-wave transmitter from which a main transmitter is controlled for wireless transmission of the pictures representing the scene. A sound accompaniment may be similarly recorded on the same film or on a separate film and may be similarly analyzed for transmission. The film 2 in its passage through the developer bath 7 is wound spirally on sprocket rollers 8, 9 and before being scanned is subjected to a mechanical and /or centrifugal drying process.
Patent GB-356974-A (GB)
Title: Improvements in non-return valves
IPC: F16K15/03
Filed: 1930-10-18
Abstract: 356,974. Ball and roller bearings. GUEST & CHRIMES, Ltd., Don Street, and WATSON, F. M., Selwood, Doncaster Road, both in Rotherham. Oct. 18, 1930, No. 31273. [Class 12 (i).] Ball or roller bearings 5 for use in hinged non- return valves are detachably housed in casings 4, removably secured in external recesses 1a in the main casing 1. The casings 4 are secured in position by bolts 6 engaging flanges 4a, and screwed studs 7 are provided to facilitate removal. The bearings are held in the casings by cover plates 8 and holes 10, normally closed by screws 11, are provided for the insertion of tools to remove the bearings. Endwise movement is prevented by the engagement of the end of the hinge pin 2 with the outer wall of the casing and packing washers are inserted in the bottom of the main casing recesses to prevent the entry of foreign matter.
Patent GB-629784-A (GB)
Title: Improvements in or relating to machine tool chucks
IPC: B23B31/20
Filed: 1947-11-27
Abstract: 629,784. Chucks. WARD & CO., Ltd., H. W., and BUNCH, W. H. Nov. 27, 1947, No. 31407. [Class 83 (iii)] In a chuck, the collet a is operated by an axially-slidable wedging sleeve b which is movable by an axially-slidable sleeve h through the medium of two sets of radially-movable balls f, g, or equivalent elements mounted in a fixed member d, the sleeves b, h, which are grooved at r, s, respectively, co-operating with the set of balls f for contracting the collet and with the set of balls g for releasing it. The sleeve h is movable axially by means of an angularly-movable cam ring m provided with a cam groove n in which are located guide-pieces o attached to a fixed part q. The ring m, instead of being angularly movable, may be moved axially by fluid-operated means.
Patent GB-1010617-A (GB)
Title: Organopolysiloxane compositions
IPC: C08K3/18
Filed: 1963-08-08
Abstract: The silicone rubber-forming compositions of the present invention are substantially identical to those of the parent Specification except that BaO2 is added instead of BaO to improve the reversion resistance of the rubber.
Patent GB-537032-A (GB)
Title: Improvements in means for controlling the supply of gas and air to internal-combustion engines
IPC: F02B43/00
Filed: 1939-12-04
Abstract: 537,032. Regulating. GAS LIGHT & COKE CO., INMAN. W. J., and CROSS, J. Dec. 4, 1939, No. 31447. Addition to 432,051. [Class 7 (vi)] In a device for automatically regulating the supply of a mixture of gas and air; as described in the parent Specification, comprising a piston acted on by engine suction so as to control air inlets and a metering- pin on the gas inlet, the piston 11 is hollow and provided with ports 22 controlling air inlets 23, and carries the metering- pin 15 controlling the gas inlet 14, means being provided for rotating the piston to adjust the circumferential overlap of the air-inlet ports. This rotatable adjustment is obtained by means of a ring 29 carrying a screw 25, which passes through a circumferential slot in the casing 10 and engages one (24) of the air ports in the piston, this port being larger than the other ports 22. The lower end of the piston is formed with gas-inlet ports 21, and the metering-pin 15 has a conical valve seat 19 engaging the sharp edge of a shoulder 18 on the gas inlet 14. Cross wires 31 limit the upward movement of the piston under engine suction. In a modification, the gas inlet 14 extends upwards through the piston, and engages a metering-pin at the upper end, the gas ports 21 being omitted.
Patent GB-851065-A (GB)
Title: Improvements in or relating to flushing valves
Inventor: COVINGTON GEOFFREY NORMAN
IPC: E03D3/04
Filed: 1957-10-08
Abstract: 851,065. Valves. SUPERFLUSH Ltd. Nov. 12, 1958 [Oct. 8, 1957], No. 31483/57. Class 135. In a flushing valve of the type having a side inlet 9 and axial outlet 10 and a main valve 19 carried by a leaky piston 26, and a pilot valve 17 which is unseated by an actuator 12 to relieve pressure above the piston and allow the main valve to open under the inlet pressure, and in which the main valve closes during the time taken to re-charge the space above the piston through the leak (23), the pilot valve 17 has a compression loading spring 21 which is retained by a bridge 28, this bridge being located both longitudinally and circumferentially in the piston 26 by co-operating parts thereon. The bridge, Fig. 4, has a central seating 35 with a spigot 36 for the spring and side lugs 37 to 40 which engage underneath the sides of recesses 33, 34 in ledges 31, 32 in the top of the piston (Fig. 2). A loose telescopic extension 18 of the pilot valve follows the rise of the piston and allows the pilot valve to reseat and remain reseated until the main valve has closed, whether the actuator 12 is withdrawn or not.
Patent GB-245095-A (GB)
Title: Improvements in electric motor control systems
IPC: B60L15/04
Filed: 1925-12-14
Abstract: 245,095. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Storer, N. W., Candee, A. H., and Aspinwall, L. M.). Dec. 23, 1924, [Convention date]. Regenerative systems; series-parallel systems. - Relates to regenerative control systems for traction motors. According to the invention two or more main motors 3, 4 are changed from parallel to series connection during regenerative braking and are associated with progressively shunted resistances 14, 15, 16 so as to keep the motors in circuit during the whole braking period. The main motors are associated with small machines 12, 13 which can work both as motors to assist the drive and as exciters for regenerative braking. The small machines may have a common field winding 11, and are excited by current from the mains through a resistance 22 which is varied by an auxiliary controller during the final stage of progressive acceleration and during progressive braking.
Patent GB-1300365-A (GB)
Title: Apparatus for applying an adhesive to the margin of a shoe upper
Inventor: KROLIKOV BORIS ZAKHAROVICH
IPC: A43D25/18
Filed: 1971-07-07
Abstract: 1300365 Coating shoe uppers LENING- RADSKOE SPETSIALNOE KONSTRUKTORSKOE BJURO PO PROEKTIROVANIJU KOVHEVENNYKH I OBUVNYKH MASHIN 7 July 1971 31815/71 Heading B2L Apparatus for applying adhesive to the margin of a lasted shoe upper comprises a clamp 2 with members 9, 10 for holding the last which clamp is movable past a roller 4 which dips in a bath 3 of adhesive, the roller comprising two truncated cones with their smaller faces joined together and having a helical groove in their outer surfaces, the bath 3 being resiliently mounted on a spring loaded arm 22. The lasted shoe is placed on a support 8 with the toe on a resilient support 7 and is grasped by the clamp 2. One part 9 of the clamp is carried by a member 11 on a guide 12 moved by a fluid drive piston 14. The other part 10 is mounted on a member 15 which is urged towards the part 9 by a spring 25. The bath 3 is journalled at 20 and mounted on an arm 22 which is resiliently supported by a spring.
Patent GB-759004-A (GB)
Title: A wooden back board for a lavatory seat
IPC: A47K13/24
Filed: 1954-11-03
Abstract: 759,004. Closet seat mountings. WINKLER, O., WINKLER, R., and WINKLER, O., [trading as FRANKISCHEN HOLZWARENFABRIK O. WINKLER KOMM.-GES.]. Nov. 3, 1954 [Nov. 3, 1953; Feb. 17, 1954], No. 31817/54. Class 26. A wooden back board 1 for a closet basin seat has a number of grooves 21 and 2<SP>11</SP> formed in its under face, the grooves being of tapered cross-section so as to retain the heads of tapered bolts 4 for securing it to the rear of the basin. Enlarged entry openings 31 and 311 for the heads of the bolts are provided, and a compartment 7 also in the underside is adapted to contain the bolts 4, buffers 6 and butterfly nuts 5 necessary for the fixing, the compartment being closed by an adhesive transparent strip 8 until these fittings are required.
Patent GB-943825-A (GB)
Title: Improvements in and relating to toys
IPC: A63H18/00
Filed: 1962-08-20
Abstract: 943,825. Toys. A. EINFALT, and J. EINFALT, [trading as GEB. EINFALT BLECHSPIELWARENFABRIK]. Aug. 20, 1962 [Feb. 10, 1962], No. 31923/62. Heading A6S. In a toy representing a closed circuit roadway, vehicles move by gravity from a higher to a lower position and are pushed from lowermost to highermost position by mechanism within an enclosure representing a mountain and summit station of a cable railway which is driven by the same mechanism. The said mechanism comprises a pusher arm 29 operated by a clockwork motor 10 to push the vehicles from the lowermost position. The upper end of the shaft 25 carrying the pusher arm has a pulley 27 driving the upper end of the endless belt 23 representing the cable railway. Additional interest is provided by stop 42 on a lever 45 which is normally biased to stop vehicles until released by another vehicle passing over a button 44 on the other end of lever 45.
Patent GB-1061033-A (GB)
Title: Improvements in photographic processes
IPC: G03C1/492
Filed: 1963-08-13
Abstract: 1,061,033. Photographic silver halide material. E.I. DU PONT DE NEMOURS & CO. Aug.13, 1963 [Aug. 16, 1962 No.31975/63. Heading G2C. A positive silver salt image, which can be processed to form a positive visible image, is obtained by (1) exposing to an image the outer high-speed light-sensitive silver halide emulsion layer only of a photographic element having also a contiguous inner low-speed light-sensitive silver halide emulsion layer on a support, the halide in the inner layer being more soluble in silver halide solvent than that in the outer layer, (2) developing the element to form a silver image in the outer layer using a developer composition which does not dissolve silver halide, (3) during or after step (2) developing the element with a developer composition having a reduction potential greater than 1À0 together with a silver halide solvent to form a positive silver salt image in the inner layer, and (4) removing the outer layer, for example, by washing with warm water. The first development step (2) may be omitted. The outer emulsion may be a sensitized silver bromoiodide or chlorobromide emulsion and the inner one may be an unsensitized silver chlorobromide emulsion having a high chloride content. Preferably the inner emulsion layer is hardened e.g. by formaldehyde and the outer layer unhardened, a tanning inhibitor e.g. 1-phenyl-5-mercaptotetrazole, urea or resorcinol being present in the outer layer or in the developer so that the developed outer layer may be washed off. Alternatively both layers may be hardened if a thin, soft water-diffusible layer is present between them to aid removal of the outer layer. The developers for steps (2) and (3) may contain hydroquinone and 1-phenyl-4-methyl-3-pyrazolidone and the silver halide solvent in the developer for step (3) may be sodium, potassium or ammonium thiosulphate. Constrast may be increased by using a bleach bath to bleach the toe of the outer negative image between steps (2) and (3). The silver salt image obtained on the inner layer is made visible by fogging with light followed by black and white or colour development, by the use of a fogging developer or by toning.
Patent GB-1393958-A (GB)
Title: Internal combustion engine
IPC: F02B23/08
Filed: 1972-07-10
Abstract: 1393958 Combustion chambers DAIMLERBENZ AG 10 July 1972 [16 July 1971]  32147/72 Heading F1B I.C. engine has a cylinder head provided with a combustion chamber in which an inlet valve and an outlet valve are disposed, one valve being in a hollowed out region of the combustion chamber and the other valve 3 being in a compression gap region 12 of the combustion chamber, the cylinder head surface which defines the compression gap lying substantially parallel to the crown of a piston co-operating with the combustion chamber and extending in the same plane as the end-face of a valve seat for the valve disposed in the compression gap. The depth of the compression gap region, in a direction parallel to the direction of piston movement is such that complete combustion occurs in this region, thus reducing the emission of unburnt hydro-carbons. The periphery of the compression gap region preferably corresponds to the cylinder bore. The ignition timing may also be retarded and this is equivalent to additional enlargement of the compression gap.
Patent GB-1183436-A (GB)
Title: Process for the preparation of Polymer Compositions
Inventor: SMID JACOBA PETRONELLA ELISABE
IPC: C08K5/00
Filed: 1968-07-05
Abstract: 1,183,436. #-Lactone polymer compositions. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 5 July, 1968, No. 32238/68. Heading C3R. Compositions substantially consisting of one or more polymers of #-lactones are prepared by mixing the polymers with one or more desactivators of the group consisting of dihydrocarbyl sulphides of formula R-(S) n -R, where each R is a hydrocarbyl group and n is an integer, α- or #-aryl or allyl-substituted alkyl halides, complexes of boron halides and phospines, are nediazonium salts of complex fluoroacids, tropylium salts and ammonium salts. The polymers of #-lactones are preferably prepared by polymerization of one or more #-lactones of formula wherein R 1 , R 2 , R 3  and R, may be the same or different, and may be hydrogen or a hydrocarbon radical, which may be substituted. Preferably, R I  = R 2  = H, and preferably the #- lactones are α,α-dialkyl-#propiolactones, e.g. a,a - dimethyl # - propiolactone. Preferably the dihydrocarbyl sulphide is a dihydrocarbyl mono- or disulphide, the hydrocarbyl groups preferably being straight chain hydrocarbon radicals of 7-20 carbon atoms, preferably identical, e.g. dihexadecylmonosulphide. The α- or #-aryl or allyl-substituted alkyl halide is preferably a chloride, e.g. #-phenyl ethyl chloride. The boron halide/phosphine complex may be BF 3 .PPh 3 . The anenediazonium salt is preferably a salt of hexafluorophosphate, e.g. p - chlorobenzenediazonium hexafluorophosphate. The tropylium salt is preferably tropylium tetrafluoroborate, and the ammonium salt may be ammonium chloride. Preferably between 0À0001 and 5 parts by weight of desactivator per 100 parts of polymer are used. The desactivator is preferably added by impregnating the polymer with a solution of the desactivator and subsequently removing the solvent. One or more stabilizers and/or antioxidants may be included in the composition.