baber/WOPTO huggingface dataset:
Patent GB-490681-A (GB)
Title: Process for the manufacture of 3.4-dicyano-diphenyl
IPC: C07C255/51
Filed: 1937-02-18
Abstract: 3.4 - Dicyanodiphenyl is made by heating 4 - cyanodiphenyl - 3 - sulphonic acid, preferably in the form of an alkali metal salt, with a salt of ferrocyanic or hydrocyanic acid, preferably an alkali metal salt.  The reaction may be performed at 250 to 300 DEG  C., the 3.4-dicyanodiphenyl being isolated by sublimation at 340 DEG  C.  An example describes the reaction of sodium (or potassium) 4-cyanodiphenyl-3-sulphonate with potassium cyanide or ferrocyanide. 4 - Cyanodiphenyl - 3 - sulphonic acid is made by heating 4-aminodiphenyl with chlorsulphonic acid to give 4-aminodiphenyl-3-sulphonic acid, and replacing the amino group by cyano by the Sandmeyer reaction.
Patent GB-548187-A (GB)
Title: Improvements relating to box spanners
IPC: B25B13/06
Filed: 1942-04-15
Abstract: 548,187. Wrenches. JOHNSON, B. T., and EDWARDS, A. A. April 15, 1942, No. 4928. [Class 61 (iii)] A spanner comprises a metal tube in the end of which six slots of a length equal to the depth of the nut are cut out at equal distances round the circumference to pass over the corners of the nut, resulting in a reduced outside diameter of spanner.
Patent GB-1350311-A (GB)
Title: Tetra-bicycloheptyl- transition metal compounds
IPC: C07F11/00
Filed: 1972-02-02
Abstract: 1350311 Tetra-(bicycloheptyl) transition metal compounds HERCULES Inc 2 Feb 1972 [2 Feb 1971] 4935/72 Heading C2J [Also in Division C3] A compound of formula Y 4 M, where Y is where one R is H or CH 3  and the other Rs are H and each R<SP>1</SP> is H or CH 3 , there being a total of 0-3 CH 3  groups attached to the bicyolic radical, and M is Ti, Zr, Hf, V, Cr, Mn, Fe or Co, is prepared by reacting Li-Y with a salt (especially a halide), ether complex thereof, or an alkoxide of the metal M in an inert atmosphere and in a saturated hydrocarbon diluent at - 78 to 100 C. In the examples, tetracamphyl chromium and the tetranorbornyl compounds of each of the above metals are prepared. The compounds are useful as polymerization catalysts and also for cross-linking carboxylated polymers.
Patent GB-452368-A (GB)
Title: Improvements in and relating to screens for cathode ray apparatus
IPC: H01J29/16
Filed: 1935-02-15
Abstract: 452,368. Cathode-ray tubes. TURNER, F. S., 2576, Green Street, San Francisco, U.S.A. Feb. 15, 1935, No. 4977. [Class 39 (i)] The screen of a cathode-ray tube for oscillography, television, &c. comprises a thin metal sheet heated uniformly by means independent of the ray and raised locally to incandescence by the ray to produce the picture. The uniform heating may be to 800‹ K. by resistance heating, by infra-red radiation or by an auxiliary, unmodulated cathode-ray. The screen is of tantalum 50-100 x 10<-6> inches thick or of tungsten or molybdenum, the thickness being such that an incandescent area of the screen loses heat more by radiation than by conduction to adjacent areas of the screen. A rectangular foil 34, Fig. 2, is secured at one end to a frame 29 and at the other end to a spring-pressed sliding bar 33 insulated from the frame. Current is passed through the screen to heat it uniformly, via leads 30, 37. The screen may also be tensioned transversely, or a circular foil may be radially tensioned, to maintain it flat. The cathode ray is produced by a hot cathode, a modulating electrode 17, Fig. 1, and an anode 9 with conical projection 7 and is deflected by coils 40, 41. The ray is screened by a metal coating deposited on the wall 1 from a cup 24 and connected to the anode 9 by a spring arm 25. The frame 29 is supported from a side arm 28, operating data are specified. A brilliant image on a small screen may be projected on to a large viewing screen. Specifications 442,963 and 452,406 are referred to.
Patent GB-973567-A (GB)
Title: Graft polymers and production thereof
IPC: C08F20/60
Filed: 1961-02-10
Abstract: A process for preparing a graft co-polymer of one or more ethylenic monomers having a linear carbon-to-carbon chain derived from said ethylenic monomer or monomers having grafted thereonto at at least one point along said chain a polyamide side chain containing at least 6 carbon atoms per recurring unit of the polyamide chain, the carbon-to-carbon chain and the polyamide side chain being linked directly or indirectly through a divalent organic group to an N:N-diacyl tertiary amide group of the formula <FORM:0973567/C3/1> where A is a keto, thioketo, sulphonyl, phosphinyl or thiophosphinyl group, B is the same as A or a nitroso group, R is the same as A or B, a monovalent hydrocarbon group, a heterocyclic group or any of the same groups containing one or more inert substituents, or A and B together form a ring which may include a portion of the carbon-to-carbon chain of the polymer or A and R together form a ring which does not include the group B, at least one of the groups A, B and R being directly or indirectly linked to the carbon-to-carbon chain, comprises polymerizing under substantially anhydrous conditions a lactam containing at least six ring carbon atoms in the presence of an anionic catalyst and (a) a linear carbon-to-carbon polymer derived by the addition polymerization of one or more ethylenic monomers, said polymer containing at least one N:N-diacyl tertiary amide group <FORM:0973567/C3/2> (as defined above) or (b) a linear carbon-to-carbon polymer derived by the addition polymerization of one or more ethylenic monomers, said polymer containing at least one point of attachment which by further reaction with a lactam containing at least six ring carbon atoms forms an N:N-diacyl tertiary amido group as defined above.  Specified ethylenic monomers providing points of attachment which may be copolymerized with other monomers e.g. styrene, ethylene, propylene and isobutylene are N-acrylyl caprolactam, N-methacrylyl caprolactam, N-vinyl imides, N-substituted maleimides, methacrylyl chloride, acrylyl bromide, vinyl benzoyl chloride, and p-vinyl benzenesulphonyl chloride. Specified lactams are e -caprolactam, methyl caprolactam, cycloheptanone isoxime, cyclooctanane isoxime, cyclopentadecanone isoxime and cyclic hexamethylene adipamide.  The Specification describes the preparation of copolymers from: (B) styrene and N-methacrylylcaprolactam and (C) styrene and methacrylyl chloride. In the examples caprolactam is polymerized in the presence of:-(1), (3), (4), (5), (6) and (7) a styrene-N-methacrylyl caprolactam copolymer and sodium hydride; (2) a styrene-N-methacrylyl caprolactam copolymer and sodium caprolactam; (8), (9), (10) and (11) a styrene-methacrylyl chloride copolymer and sodium hydride; (12) an isobutylene-maleic anhydride copolymer and sodium hydride; (13) an ethylene-maleic anhydride copolymer and sodium hydride; and (14) a styrene-acrylic anhydride copolymer and sodium hydride. Specifications 863,859 and 872,328 are referred to.
Patent GB-1287037-A (GB)
Title: Document transporting apparatus
IPC: G06K13/107
Filed: 1970-02-03
Abstract: 1287037 Feeding sheets INTERNATIONAL BUSINESS MACHINES CORP 3 Feb 1970 [10 Feb 1969] 5065/70 Heading B8R A pneumatic sheet transport roller comprises a cylindrical wall 22 perforated at 14 and communicating with a vacuum source via passages 17, 21, Fig. 2a, and a selectively operable diaphragm valve 19. The valve is controlled by a bi-stable jet amplifier 30 such that pneumatic control pulses through passage 37 close the valve and pulses through passage 38 open the valve and connect apertures 14 to vacuum passage 21. A second set of apertures 15, Fig. 3a, may be provided spaced from apertures 14 around the roller periphery. Actuation of a second diaphragm valve 19, Fig. 3a, to connect apertures 15 to a further vacuum passage 21, is caused by a sheet gripped by apertures 14 covering sensing aperture 42. A gripped sheet may be transferred to a further similar roller when apertures 14 are rendered inoperative by a control pulse and apertures 15 are rendered inoperative by the sheet uncovering aperture 42 as it is transferred.
Patent GB-1085573-A (GB)
Title: Electrophotographic image formation and development
IPC: G03G5/022
Filed: 1965-02-05
Abstract: 1,085,573. Electro-photographic image reproduction. RANK XEROX Ltd. Feb. 5, 1965 [Feb. 17, 1964], No. 5081 /65. Heading G2H. A method of forming a latent electro-static image on an imaging layer comprises modifying the triboelectric charging susceptibility of a surface of the layer in imagewise configuration and bringing this surface into frictional contact with a material remote in the triboelectric series from at least one of the modified and the unmodified portions of the imaging surface so that a differential charge pattern is set up between image and non-image areas of the imaging layer. The imaging surface may be modified by: (a) the use of a surface layer of material which is photo-polymerized by ultraviolet light in an imagewise exposure, (b) the use of a surface contaminant, comprising oil based ink, or human body oils, applied to the surface in an image configuration. The latent image formed by either method is developed by cascading with toner particles carried on beads as is well known. The developed image may be transferred to another surface electrostatically or adhesively. Heat fixing is used. Alternatively the latent image is scanned by a device which senses charge variation, or again charge induced plastic deformation techniques may be used. In the copying apparatus of Fig. 2, an imaging surface 11, consisting of a substrate thinly coated with a photo-resist of cinnamate esters of polyvinyl alcohol and of cellulose, is fed from roll 12 to take-up roll 16 and is exposed to a projected image at 17. Triboelectric charging roller 18, having a surface coating of viscose rayon, nylon, wool, or the like, then differentially charges surface 11 which is then moved to the cascade developing unit 19. The toner particles and carrier bead coating are chosen to give positive or negative development. Heat fixing takes place at 27, or solvent vapour fixing or adhesive spraying may be used.
Patent GB-230064-A (GB)
Title: Improvements in can openers
IPC: B67B7/46
Filed: 1925-02-24
Abstract: 230,064. Tanner, A. J. Feb. 29, 1924, [Convention date]. Opening by cutting.-A can-opener consists of an " operative " member. comprising a blade 7 formed with a cutting edge (shown dotted in the Figure) and, if desired, a bottleopening hook 8, both integral with a tang 4, held in place frictionally within a ferrule 2 on the handle 1 by means of a bifurcated " body " member grooved in front at 15 to provide a fulcrum and shouldered to engage over a notch in the blade to hold it in place in the handle, the tangs 12 of the " body " member being disposed either side of the blade tang 4 within the bore 14 of the handle.
Patent GB-546837-A (GB)
Title: A process for the production of hypohalous acid solutions
IPC: C01B11/04
Filed: 1941-04-21
Abstract: 546,837. Hypochlorous acid. FIFE, J. G. (Shell Development Co.). April 21, 1941, No. 5139. [Class 1 (ii)] Hypochlorous acid substantially free from halide irons is obtained by distilling solutions containing hypochlorous acid and a watersoluable halide salt in the presence of added chlorine gas. Examples describe inter alia the distillation of solutions obtained by the interaction of chlorine and sodium hydroxide, and of chlorine and lime slurry, chlorine being introduced with steam into a stripping column.
Patent GB-556813-A (GB)
Title: Improvements in or relating to laminated articles and their methods of manufacture
IPC: B32B27/00
Filed: 1942-04-17
Abstract: 556,813. Laminated fabrics. PILKINGTON BROS., Ltd., and BRADLEY, P. R. April 17, 1942, No. 5156. [Class 140] For the production of laminated articles by the application of plastics in powder form to laminar materials of a non-retaining nature such as wood veneer with uneven or cockly surfaces or open weave textiles which do not lend themselves to efficient dry particle spreading operations a sandwich is formed of layers of even surface material such as paper or close weave textiles and of the dry plastic particles such as phenol or cresol formaldehyde resin which is subject to heat and pressure sufficient to cause the layers of paper &c. to become united to the plastic and the layer or layers of veneer or other non-retaining material are then applied to or between the sandwich or sandwiches and united thereto under moulding pressure and temperature causing the plastic to exclude through the laminar material of the sandwich or sandwiches and bond the latter to the veneer &c. and to attain the fully cured condition. Fabric such as open weave or net material or strong or cord material may be included in the plastic layer of the sandwich. Specification 551,610 is referred to.
Patent GB-344631-A (GB)
Title: Improvements in and relating to coin banks
IPC: A45C1/12
Filed: 1930-02-17
Abstract: 344,631. Money boxes. ZELL, D. H., 536, Broadway, New York, U.S.A. Feb. 17, 1930, No. 5254. [Class 18.] A coin bank has a sheet metal structure, comprising side walls 5 connected by a top wall 6, and covered with a removable ornamental flexible covering 8, the ends of which are turned up round the bottom edges of the side walls, as at 9. The end walls 7 of the bank are separable from the rest of the structure, and the bottom 19 is described as being separable. The end walls 7 are covered by a piece of the ornamental covering material 10 held thereon by endplates 11. These endplates have laterally projecting flanges 12 which carry bendable tongues 13 adapted to co-operate with slots 16 on the top wall 6 to hold the end walls to the main structure. Bendable tongues or extensions 14 of the lower ends of these flanges 12 are bent up to hold the edges 9 of the covering in place against the side walls 5, while the lower edges of the plates 11 are bent up against the endplates 7 as shown at 15. One endplate 7 and the corresponding piece of covering 10 and the plate 11 have a coin slot 17 cut in them which has a closure member 17a to prevent the possibility of coins falling out. In the other end a round hole for bills or notes is made. The bottom wall of the structure has side flanges 20 and end flanges 21, with slots 22 cut in the side flanges. These slots engage with studs 24 on inwardly struck resilient tongues 23 carried by the side walls 5 to hold the bottom in position, the edges 9 of the flexible outer covering being frictionally held between the bottom wall 19 and the side walls 5. An opening in the bottom walls is formed with an inwardly projecting offset flange 26 and is adapted to be closed by means of a plate having a suitable form of keyoperated lock 28.
Patent GB-488879-A (GB)
Title: Means for controlling the engagement of the driving and driven members of a clutch
IPC: B60K23/02
Filed: 1937-02-22
Abstract: 488,879. Dashpots. BAGNARA, E. Feb. 22, 1937, No. 5260. [Class 108 (iii)] [Also in Group XXIV] Consists in hydraulic means for controlling the engagement of driving and driven members of a clutch. A casing 1, Fig. 1, is divided by a partition 12 into chambers 2, 3 adapted to contain liquid, e.g. glycerine. The chamber 2 forms a cylinder for a hollow piston 5 loaded by a spring 4 and provided with a concentric spring-loaded valve 6 controlling a port 5<11> in the piston. A spindle 8 connected with the clutch-actuating mechanism carries an arm 7 having a nose 7<1> adapted to engage the piston. In the lower end of the cylinder is an aperture 14 provided with a valve 11 for adjusting the rate of flow from the chamber 2 to the chamber 3, this valve being adjusted by hand or from the accelerator in the case of a motor vehicle. When the clutch gear is released to engage the clutch, the nose 71 presses on piston 5 and forces liquid into chamber 3. During disengagement of the clutch, the nose 7<1> moves away from the piston and the latter rises and liquid flows from chamber 3 through ports 51, 511 and past valve 6 to chamber 2. In a modification, the spindle 8 is actuated by an arm 15, Fig. 3, having a slot 16 adapted to receive adjustably one end 17 of a link 18, the other end 19 of which is pivoted to a link 20 which in turn is connected to the clutch-operating member. The parts are returned to their original position by a spring 21. The casing 1 may be mounted on the vehicle chassis or other part by a universal joint 22.
Patent GB-124570-A (GB)
Title: Improvements in Artificial Limbs.
Inventor: DANSON JOSEPH DANIEL
IPC: A61F2/60
Filed: 1918-03-27
Abstract: 124,570. Danson, J. D. March 27. 1918. Limbs, artificial.-Comprises special pawl-andratchet gear for knee-joints forming a locking- mechanism of the general type in which the joint is locked when supporting the weight of the wearer and is free to rotate when the weight is thrown on the other leg. Fig. 1 shows one construction specially adapted for pylons, in which ratchet sectors 1 are fixed at each side of the thigh portion of the leg. When the calf portion moves downwards in the sleeve 6, owing to the weight being thrown on the limb, pawls 3 are pushed upwards into engagement with the sectors by sliding-rods 8 attached to the foot portion, and lock the joint against rearward movement. The pawls disengage by gravity or by spring action as soon as the pressure on the limb is relieved. Fig. 3 shows a modified construction in which the sleeve 6 carrying the pawl-actuating rods is fixed near the upper end of the calf portion of the leg, and the projection 15 moves relatively to the sleeve when the weight is thrown on the leg. Fig. 5 shows a further modification in which the pawlactuating rods 8 are made longer and carry the ankle pivot 17 at their lower ends. When the weight comes on the limb, the foot and ankle pivot move upwards in slots 21 on the calf portion to operate the pawls. The limb may be fitted with a bucket comprising a wooden base supporting a metal framework 22, 23, and 24, the whole structure being covered with papier mÔchÚ and lined with felt. The felt lining is turned outwards over the top of the metal ring 24 and secured by sewing down or other suitable means. The foot is provided with the usual front and rear springs, as shown in Fig. 5, and with a pivoted toe-piece, as shown in Fig. 4.
Patent GB-1411068-A (GB)
Title: Separation of primary and secondary amines
IPC: C07D295/023
Filed: 1974-02-06
Abstract: 1411068 Amines L I BLYAKHMAN S L DAVYDOV and V F KASHINA 6 Feb 1974 05424/74 Heading C2C A primary or secondary amine is recovered from an aqueous, organic or aqueous organic solution thereof by distillation or extraction in the presence of carbon dioxide. Distillation is preferably effected with cycling of carbon dioxide in a closed system. Alternatively the starting amine solution is saturated with carbon dioxide and other components in the mixture are extracted with an organic solvent. The amine carbonate remains as a residue or as a concentrated solution from which the amine can be recovered after removal of the carbon dioxide by heating or refluxing. Examples describe the separation of morpholine, cyclohexylamine, n-butylamine, N,N-diethylethylene diamine, di-n-butylamine and piperidine from mixtures containing them.
Patent GB-587535-A (GB)
Title: Improvements in and relating to recording apparatus e.g. autographic registers
IPC: B41L5/00
Filed: 1944-03-23
Abstract: 587,535. Selective punching mechanism. WIL- 'LIAMS, W. P. (Standard Register Co.). March 23, 1944, No. 5427. [Class 31 (ii)] [Also in Group XIX] Recording apparatus, such as an autographic register, comprises a plurality of punches arranged in groups, some or all of which are in longitudinal alignment, an actuator common to a plurality thereof, and key-controlled selection means for conditioning for actuation not more than one punch in each group. Continuous superposed strips of series-connected, detachable, printed forms are advanced past an aperture 13<1>, Fig. 1, by motor-driven means under control of a starting button 13. In addition to hand-written inscriptions made at the aperture 13<1>, appropriate areas of the form are punched in accordance with the setting of keys 41. A cam surface 61, Fig. 8, on each key stem moves a latch plate 57, rocking a detent 47 and releasing a stepped and spring-urged selector bar 38 associated with that key bank. Coupling plungers 39, Fig. 3, are brought over appropriate punches 23 when a lever 42, pivoting about a rock shaft 65, is depressed, pulling the selector bars 38 by springs 46, until the bars are arrested by the engagement of steps 45 with the appropriate key stems. A projecting foot 43 then engages a hinged actuator plate 35 which depresses the coupling plungers 39 and operates the punches 23. The retractor springs 46 are attached to a frame 67 sliding in tracks 71 and, upon return of the lever 42, this frame returns the selector bars 38 to their initial positions and releases the depressed keys.
Patent GB-997110-A (GB)
Title: Circuit arrangement for varying amplitude of a signal
IPC: H03G1/02
Filed: 1963-02-11
Abstract: 997,110. Transistor amplifying circuit; volume control. FERNSEH G.m.b.H. Feb. 11, 1963 [Feb. 10, 1962], No. 5430/63. Headings H3T and H4R. In a transistor circuit the amplitude of a signal is varied by applying the signal to one end of a voltage divider consisting of two series connected resistors of which the other end is connected to a point of fixed potential and one of the resistors is a voltage dependent resistor, the amplitude of the input signal being varied in accordance with a direct voltage applied to the voltage dependent resistor. A video signal at terminal 1 is applied through emitter follower 3 to one end of a voltage divider comprising resistor 11 and voltage dependent resistor 12, the attenuated signal being taken from tapping 13 to the base of transistor 15 from the collector of which the output signal is taken. The resistance of resistor 12 and hence the amplitude of the output signal is varied by means of an adjustable bias taken from a tapping on potentiometer 27 and applied by way of resistor 28 to signal input 9. The emitter of transistor 15 is connected to point 17 so that the base and emitter electrodes of 15 are supplied with signal voltages of like phase with the result that the range of control which may be produced by the voltage divider is increased and by suitable choice of resistors 18, 19 the signal at 26 may be controlled down to zero amplitude or its polarity reversed. A series combination of inductor 21 and resistor 22 is connected in shunt with the voltage variable resistor 12 to counteract the effect of the shunt capacitance of resistor 12 on the upper region of the passband. The changes in signal amplitude may be effected automatically in accordance with the varying amplitude of the input signal, Fig. 2, in which circuit potentiometer 27 and resistor 28 of Fig. 1 are omitted and the control voltage derived from the collector of a further transistor 36 is applied directly to point 9.
Patent GB-647132-A (GB)
Title: Fluid-blast circuit breakers for interrupting high voltage direct currents
IPC: H01H33/59
Filed: 1947-02-25
Abstract: 647,132. Fluid blast circuit-breakers. AKT.-GES. BROWN, BOVERI, & CIE. Feb. 25, 1947, No. 5462. Convention date, March 11, 1946. [Class 38(v)] The arc struck when contacts a, b, of a high-voltage D.C. circuit - breaker are separated, is stretched in a blast chamber d to a lengtl such that the arc-voltage is greater than the terminal voltage. The arc is cooled by a blast of fluid, e.g. compressec .air, hydrogen, oil, water, or carbon tetrachloride, which i: given a spiral motion by blades f attached to the contact b, as shown, or mountec in hollow contact a, a gasifiable and vaporizable material may be added to the cooling fluid on the inlet or outlet side of the contact a, e.g. through the centre of contact b, or through pipes g 1  - g 4 . The chamber d may be of insulating or conducting material, and if the latter may comprise several mutually insulated cylinders connected to each other through resistances, Fig. 3 (not shown). The elements, or the chamber itself, may alternatively, be of resistance material, e.g. carborundum.