baber/WOPTO huggingface dataset:
Patent GB-498854-A (GB)
Title: Improvements in or relating to gas discharge valves
IPC: H01J3/02
Filed: 1937-07-16
Abstract: 498,854. Thermionic valves. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. July 16, 1937, No. 19762. Convention date, July 16, 1936. [Class 39 (i)] A gaseous discharge tube comprises an anode forming part of the tube envelope and fitting over a ceramic body which is slotted to provide passages for the electric discharge from a cathode within the container to the anode, surfaces being formed on the ceramic body about these passages on which a plurality of control electrodes may be supported in close, accurately spaced relation, the separation between these electrodes and the anode being small enough to prevent the occurrence of ionic discharges therebetween. The ceramic body 1 is provided with slots 2 of the crosssection shown and the anode 6, which fits closely over the ceramic body, is surrounded by a cylinder 8, so that a cooling medium of water, oil or air may circulate in the space so formed. On the shoulders 2a of the grooves 2 are metal layers 11, 12 forming respectively the space charge control grid and the control grid of the valve. The metal layers may be applied by metallizing the surfaces 2a and if desired the surfaces 2b also ; alternatively, the layers may be in the form of wires, bands or perforated metal extending over the whole groove. Further shoulders may be provided to accommodate additional grids and the grooves may form a continuous spiral.
Patent GB-155619-A (GB)
Title: Improvements in sash windows
IPC: E06B3/50
Filed: 1919-08-12
Abstract: 155,619. Clement, J. Aug. 12, 1919. Hinged-sliding windows.-In hinged sliding sashes of the kind having rabbeted sliding stiles and guiding-bolts or hinged beads on the opening side of the sashes, the outer sash has a slidable guide bolt 7 engaging a groove in frame on the opening side, and the inner sash is guided by a hinged bead 5 on the frame. The sash cords on the opening side are detachable. Reference has been directed by the Comptroller to Specifications 17381/89, 6358/92, 4670/02, 23611/02, 17207/07, and 24884/09.
Patent GB-223992-A (GB)
Title: Improvements in or relating to screw propellers
IPC: B64C11/00
Filed: 1923-08-02
Abstract: 223,992. Leitner, H. Aug. 3, 1923. Screw propellers. - Hollow detachable screwpropeller blades are balanced by an adjustable weight carried by a frame attached to the shell of the blade. A tripod d comprising three legs f, Fig. 1, carries a nut h and is secured by screws g to a ring e on the base ring c. A screw n is adjusted until the blade is balanced. The frame is then removed and the screw is secured by a pin n<1>. The frame is replaced on the blade, the screws g are backed by a wire g<1>, and a cover piece s fitted. In a modification, a cylindrical member replaces the tripod. In another form, a short cone d, Fig. 4, is riveted to the nut h and secured by screws i to the ring e. The screw n is extended to carry a balance weight o and has a square head for the adjusting tool. The cone may be replaced by a fourlegged frame formed in one with the nut and having a ring at the lower end which screws into the base ring and locked. The blade roots shown are of the kind described in Specification 169,393.
Patent GB-1065261-A (GB)
Title: A method of determining filtration and time of copying in photocopying colour negatives and colour diapositives and an electric measuring device for carrying the method into effect
IPC: G03B27/73
Filed: 1963-09-17
Abstract: 1,065,261. Photo-electric control of photographic printing. T. A. FRENNING. Sept. 17, 1963, No. 19830/63. Heading G1A. [Also in Division G2] A photo-resistance 1 connected in series with a current indicator 13, a battery 2 and a plurality of adjustable resistance 5-8 which are selectable by switches 9-12, is combined with an adjustable optical attenuator 21 to form an instrument for determining the exposure time and filter factors in colour photo-copying processes. The resistors 5-8 are employed for setting-up adjustments respectively in blue, green, red and white light measurements. A switch 4 permits the battery voltage to be halved for reduced sensitivity. The optical attenuator may comprise a step-wedge, Fig. 3 (not shown), a pair of relatively rotatable polarizing elements, Fig. 4 (not shown), or a displaceable triangularshaped diaphragm, Fig. 5 (not shown). The instrument is provided with scales which are calibrated in terms of exposure time and standard subtractive filter values. The Specification describes the use of the instrument (1) to determine the three (red, green and blue) exposure times in an additive photo-copying method and (2) to determine the three (cyan, magenta and yellow) filter factors and the exposure time in a subtractive photo-copying process.[see Division G2
Patent GB-1112945-A (GB)
Title: Construction bars and joints therefor
IPC: E04B1/58
Filed: 1965-05-11
Abstract: 1,112,945. Connecting metal members; clamps; stud and socket fastenings. M. STRASSLE. 11 May, 1965 [11 May, 1964], No. 19891/ 65. Headings E1K and E2B. [Also in Division A4] A frame includes a member 31 which is secured to a bar 8, formed with undercut channels 6, by means of a spring-pressed plunger 33 which is retracted by an eccentric portion 39 of a rotatable pin 34 so as to grip a part of the bar 8 between a T-head 44 on the plunger and the end surface 36 of the member 31. At least one end of the pin 34 is screw-threaded. In a modification, two bars 8 are connected together by arranging a plunger 33 within the bore 5 of one of the bars. Two or three mitre-ended bars may be connected by angle or T-shaped members provided with plungers.
Patent GB-1134155-A (GB)
Title: Improvements in or relating to broaches
Inventor: ZAWACKI ARNOLD J
IPC: B23D43/02
Filed: 1967-05-01
Abstract: 1,134,155. Broaches. COLONIAL BROACH & MACHINE CO. 1 May, 1967, No. 19896/67. Heading B3L. A cylindrical broach for cutting helical splines or internal helical gears com- . prises a first or roughing portion having helical rows of teeth of increasing height and a second portion of teeth of increasing width, the faces of the teeth of the second or side forming portion at least being disposed substantially normal to their length. The teeth are cut from a thread-like land the helix angle of which is complementary to that of the rows of teeth. The teeth may be formed in the body of the broach, or as shown, in shells 16, 17 which are mounted upon an arbor portion 13 and located relatively to each other by a slot and tang connection 23, 24. A shell 20 for finishing to a final internal diameter has annular teeth disposed in planes normal to the axis of the shell and is disposed on the arbor 13 after the shells 16, 17. The broach has a recessed pull end 14 and a recessed lift and turn end 15 having flats 27 formed thereon.
Patent GB-223343-A (GB)
Title: Improvements in electric control switches
IPC: H02J7/00
Filed: 1923-08-03
Abstract: 223,343. Crompton & Co., Ltd., and Jones, W. F. Aug. 3, 1923. Electromagnetic switches. - Automatic relays as used in battery charging are reset by external means with the object of getting a strong resetting stroke instead of a stroke depending on fluctuation of voltage in the relay coils. In the arrangement shown in Fig. 4, a low voltage relay R and a high voltage relay S controlling the charging of a battery 0 from a dynamo N are reset by the closure of an external electromagnetic switch T which short-circuits the high voltage coil and simultaneously strengthens the current through the low voltage coil. The closure of the switch T is brought about by moving a starting switch V on to a contact X, this action being a necessary preliminary to the starting or restarting of the charging plant. In another arrangement according to the invention a low voltage relay R and a high voltage relay S, Fig. 8, have their armatures B, B restored to the reset positions by a mechanical impulse from a sliding bar EE which is itself actuated by the movement of a starting switch FF.
Patent GB-571453-A (GB)
Title: Improvements in or relating to insulated electric cables or conductors
IPC: H01B7/29
Filed: 1943-11-29
Abstract: 571,453. Electric cables. PIRELLIGENERAL CABLE WORKS, Ltd., and BISHOP, J. L. Nov. 29, 1943, No. 19930. [Class 36] Electric cables are insulated by a covering of thermoplastic material and plasticizer which is then heated so as to volatilize the whole or part of the plasticizer. The material consists of polyvinyl chloride, acetal, or formal, acrylic resins or cellulose ethers, whilst the plasticizer may be tricresyl phosphate or dibutyl phthalate. In one example the covered wire is heated for 88 hours to between 100‹ C. and 135‹ C., the loss of plasticizer varying between 35 per oent and 85 per cent. After heat treatment, the cable loses some of its flexibility but it can be operated at much higher temperatures without risk of breakdown, such as in cookers or lighting or ignition systems, and will retain any desired configuration into which it has been formed.
Patent GB-1497571-A (GB)
Title: Plaster mixture
IPC: G10K11/16
Filed: 1975-05-13
Abstract: 1497571 Polymer-based sound absorbing plasters HOECHST AG 13 May 1975 [15 May 1974] 20099/75 Heading C3P A mixture for preparing sound absorbing resin-based plaster, comprises an aqueous polymer dispersion, a pigment, a mineral filler and any other necessary additives, the polymer having a dilatometric second order transition temperature of - 20 C. to + 10 C, and at least 70 wt. per cent of the pigment and filler having a grain size of 0À35 to 1-5 mm. The Examples utilize TiO 2  as a pigment, and fillers consisting of crystalline CaCO 3  and/or quartz sand. Other additives which may be present are mineral wool, expanded mica, foamed melamine resin powder, foamed polystyrene spherules, or perlites. The polymer may be derived from vinyl esters, (meth) acrylate esters, styrene, ethylene or vinyl chloride.
Patent GB-662201-A (GB)
Title: Improvements in locking arrangements for metal stanchions or pit props
IPC: E21D15/40
Filed: 1949-08-02
Abstract: 662,201. Pit props. PROGRES CHARBONNIER PROCHAR SOC. CO-OPERATIVE. Aug. 2, 1949 [April 4, 1949], No. 20127/49. Class 20 (ii) A locking device for the parts of a telescopic pit prop comprises a wedge 6, the edges of which bear on convex conical surfaces 7 and 8 on a bearing 4, integral with a collar 3 fixed on the tubular standard 2 and a bearing 5 frictionally held by the wedge against the extension member 1, respectively. The wedge 6 is in an oblique position so that on applying load to the extension member the bearing 5 is carried downwards and the wedge pivots about the centre of curvature O of the surface 7. Stops 9 and 10 on the bearing 5 limit its upward and downward movement by engagement with the collar. In a modification the surface 8 of the wedge is convexly curved.
Patent GB-791090-A (GB)
Title: New cadmium sulphide yellow pigments
IPC: C09C1/12
Filed: 1955-07-12
Abstract: From 0.2 to 1 per cent of selenium is incorporated into the crystal lattice of cadmium sulphide yellow pigments in order to improve their stability to atmospheric influences, and fastness to light.  The selenium may be incorporated by mixing cadmium thioselenide with cadmium sulphide followed by heating, e.g. to 500 DEG  to 700 DEG  C. for thirty minutes to two hours; or by adding a sodium sulphide solution containing selenium to the yellow pigment during its manufacture.  The treatment may be applied either to pure cadmium sulphide yellow pigments or to mixtures thereof with, e.g., barium sulphate, zinc oxide, titanium dioxide and lithopone.  In an example, a cadmium chloride solution is mixed first with a sodium sulphide solution containing selenium, and then with a hot barium sulphide solution, and the resulting pigment separated and calcined at about 600 DEG  C.
Patent GB-325772-A (GB)
Title: Improvements in and relating to the recovery of ª‰-naphthol and other difficultly filterable organic compounds
IPC: C07C37/70
Filed: 1929-07-01
Abstract: 325,772. Stewart, R. F., Venn, R. J., and Dorr Co., Ltd. July 1, 1929. #-naphthol is recovered from a dispersion in liquid media by adding thereto a finely divided solid material, e.g. sand, to act as a filter aid, and filtering the mixture, e.g. in a continuous rotary filter. The solid material thus separated is flushed into a classifying machine, e.g. a bowl classifier, where owing to the difference in the specific gravities and the relative fineness in the state of division a concentrated suspension of the #-naphthol is obtained and the filter aid is separated. The latter, after draining, may be used again. The concentrated suspension is then treated to recover the naphthol, e.g. by heating the suspension to a temperature such that the naphthol fuses, the two liquid layers thus produced being separated.
Patent GB-260693-A (GB)
Title: Improvements in engine starters
IPC: F02N99/00
Filed: 1925-08-12
Abstract: 260,693. Rogers, F. H., (Eclipse Machine Co.). Aug. 12, 1925. Turning - gear. - An engine starter comprises a flywheel set in motion by manual means or power means, or by both combined, and a driving member which is brought into engagement with the engine when a sufficient speed of rotation has been reached. In one form, Figs. 1 and 3, a bevel gear 16 forming part of a planetary gear train is engaged by a pinion 40 on the shaft of a detachable electric motor 38 and by a pinion 48 on the shaft of the flywheel 47, which is enclosed by a lateral extension 41 of the casing 1. The gear 16 rotates about a shaft 19 and carries planet pinions having teeth 25 in mesh with a fixed gear 31 and teeth 24 in mesh with a gear 15 on the shaft 19, which carries a bevel wheel 32 in engagement with a bevel wheel 37 mounted on a shaft 35 in a, detachable casing 33 and rotatable by means of a starting-handle. The fly-wheel can thus be set in motion by the motor 38 of the starting- handle or by both combined. The transmission between the gear 15 and the engine shaft comprises a rotatable barrel 3 connected by a multiple plate clutch 5 to a shell 4, a threaded part 10 of which engages threads 9 on a splined driving member 11 movable axially into engagement with internal splines in the engine shaft 12. The member 11 is normally held out of engagement with the engine shaft by the head of a rod 51 extending through the shaft 19 and held in the position shown by a spring 53 until the flywheel has been set in rotation, when the rod 51 is moved inwards against the spring 53. In a modification, the flywheel is carried by the upper end of the shaft of the electric motor.
Patent GB-139414-A (GB)
Title: Improvements in hydraulic turbines
IPC: F03B15/02
Filed: 1919-08-18
Abstract: 139,414. Moody, L. F. Aug. 18, 1919. Screw motors; casings; regulating; working- fluid supply.-An hydraulic turbine comprises a screw rotor 45, Fig. 1, mounted upon a vertical shaft. Water is admitted bv way of a volute inlet channel 43 to fixed directing vanes 83. The discharge conduit 47 is also volute-shaped and is provided with fixed diffusion vanes 40. Regulation is effected by a fluid-operated cylindrical valve 28 which partially or wholly masks the vanes 33. The vanes 33, 40, together with their metal shrouding rings, act as supports for the concrete structure which contains the turbine. The vanes 33, 40 may be of varying obliquity along their length. The lower end of the turbine shaft is mounted in a lignum vitµ step-bearing 14 to which water under pressure is led by a pipe 49 for the purpose of cooling the bearing and washing away sand or other deposit. In a modification, the rotor 63, Fig. 5, is mounted upon a horizontal shaft. Water is admitted bv way of a conduit 62 to fixed directing vanes 60. The discharge channel 66 is volute-shaped and is fitted with a ring of fixed diffusion vanes 68. In this modification, the fluid-operated regulating-valve 76 (shown in the closed position) is situated behind the rotor.
Patent GB-488969-A (GB)
Title: Wall construction for enclosures and chambers exposed internally to danger of explosion
IPC: E04B1/98
Filed: 1937-07-22
Abstract: 488,969. Drying - chambers ; workrooms ; nonconducting coverings. HERAEUS GES., W. C. July 22, 1937, Nos. 20340 and 20341. Convention dates, July 29, 1936 and Aug. 12, 1936. [Class 20 (i)] [Also in Group XIII] A wall construction for an enclosure or chamber exposed internally to the danger of explosion consists, throughout its thickness, of a plurality of heat-reflecting foils which are adapted to rupture on the occurrence of an explosion, such foils being spaced apart and secured within a frame, without intermediate filling or stiffening means. The foils may be of aluminium or other metal, or of metallized non- metallic material which may be incombustible. The foils may be in the form of flat, crimped or pleated sheets and of less than 1/10 mm. in thickness. Foils 3, 4 secured in a frame 5 may be mounted in the framework 1 of a lacquerdrying cabinet as shown in Fig. 1. Such a cabinet is heated by means of an electric element 6, and comprises a perforated charging- plate 7, an outlet flue 8, and a door 9. The outer foils 3 may be flat and the intermediate foils 4 crimped. In a modification, a frame 15, Fig. 2, which is subdivided into sections or panels 12 for receiving the foils 13, 14, is mounted in an aperture in a wall 11 of a cabinet. The rupturing of the foils may be promoted by forming the intermediate foils 24 with vertical incisions 25 as shown in Fig. 3 ; these foils may, alternatively, be weakened by providing them with rows of holes or with sharp kinks. In the construction shown in Fig. 5, sharp-edged bars 32 are provided against the outer surface of the outermost foil 33 so that, on outward bulging of the foils 29, 30, 33 due to explosion, the foils will be successively cut through by the bars 32 ; wires may be provided instead of the bars 32. The door of the cabinet shown in Fig. 1 may be made very strong and fastened securely by stays mounted across its front. The invention is applicable to the walls, or parts thereof, of cabinets, chambers and rooms for drying purposes, and of work-rooms for use in the manufacture of explosives and aluminium powder. Walls which are, exposed to the weather are protected by the provision of thin rainproof skins, such as non-inflammable celluloid.
Patent GB-1462946-A (GB)
Title: Method of effecting flocculation and polymeric flocculant composition
IPC: C02F1/54
Filed: 1974-05-08
Abstract: 1462946 Acrylamide polymer flocculant compositions SUMITOMO CHEMICAL CO Ltd 8 May 1974 [9 May 1973] 20357/74 Heading C1C Also in Division C3] A method for flocculating particulate material in waste water comprises adding to the water 0À1-10 p.p.m. of a composition which comprises 90-99 parts by weight of a polymer containing at least 50 mole per cent of acrylamide units, and at least 1 but less than 10 parts by weight of one or more precondensates of formaldehyde with urea, melamine, guanidine or dicyandiamide. The acrylamide polymer may be a homopolymer, a cationically modified homopolymer or a nonionic, anionic or cationic copolymer, e.g. with such comonomer components as acrylonitrile, methacrylamide, styrene, an acrylic acid, vinyl sulphonic or itaconic acid salt, dialkylamino ethyl acrylate or vinyl pyridine. The precondensate may contain methoxymethyl groups. The composition may be added as a dry powder or as a 0À1-1% by weight aqueous solution. The method is useful for removing suspended particles, for improving the dewatering and filtration of flocculated sludge, and sometimes for improving decoloration. Examples illustrate the flocculation of slurries of diatomaceous earth and kaolin.
Patent GB-692724-A (GB)
Title: Improvements in ceiling-mounted electrical wiring boxes
IPC: H02G3/12
Filed: 1950-08-17
Abstract: 692,724. Bases for couplings. CRABTREE & CO., Ltd., J. A., and MORGAN, R. W. Aug. 16, 1951 [Aug. 17, 1950], No. 20416/50. Class 38 (i). A ceiling-mounted wiring box a is moulded from insulating material and has an aperture a<SP>1</SP> in its top to enable it to be screwed to a joist d. An insulating ring e surrounds the rim of the box and has an internal flange e<SP>1</SP> presenting a recess e<SP>2</SP> on the outer face of the ring to receive an accessory such as a ceiling rose x, which, when screwed to the joist d, secures the ring e to the ceiling, the distance between the top of flange e<SP>1</SP> and the top of the ring being sufficient to accommodate variations in the amount of projection of the box from the ceiling due to variations in the depth of the plaster c.
Patent GB-701276-A (GB)
Title: Improvements in or relating to baling presses
IPC: B30B9/30
Filed: 1951-08-30
Abstract: 701,276. Baling-presses. LINDEMANN, W. Aug. 30, 1951 [Sept. 6, 1950], No. 20469/51. Class 94 (1) In a baling-press comprising preliminary and final presses acting in opposite directions and a movable pressing-box having doors fitted with retaining fingers to prevent retrograde movement of the material to be baled, means are provided for automatically moving the fingers to an inoperative position as the box is moved into the final press. As shown, the retaining fingers 5 are carried by shafts 4 mounted in bearings 1 and 2 in the doors 3 of the pressing-box and project through slots 6 in the doors under the action of springs. The shafts carry lever arms 7 fitted with rollers 19 which are engaged by a plate 12 carried by a plunger 11 slidable in bearings 13, 14 in a wall of the box against the action of a spring 15. The upper end 9 of the plunger carries a roller 10 which is depressed by a fixed cam 18 as the box is moved into the final press, thus depressing the plate 12 and moving the fingers to an inoperative position flush with the doors. The ends 16 of the plate are offset concentrically with the door hinges 17 so that the fingers are maintained in the withdrawn position when the doors are opened.
Patent GB-653197-A (GB)
Title: Purification of propionic acid
IPC: C07C51/487
Filed: 1948-08-04
Abstract: Propionic acid is purified by treating with hydrogen peroxide at approximately 25 DEG  C. for 24 hours.  The acid so obtained may be dehydrated directly with acetic anhydride to give propionic anhydride and acetic acid.  1-10 per cent by weight of aqueous hydrogen peroxide of 30-3 per cent strength based on the weight of propionic acid may be employed with propionic acid of more than 99 per cent purity.  An example is given.
Patent GB-837002-A (GB)
Title: Improvements in and relating to temperature control systems
Inventor: MCFARLANE MAYNARD DEEDES
IPC: G05D23/24
Filed: 1956-07-03
Abstract: Heat-transfer media comprise molten mixtures of sodium and thallium; sodium and gold; tin, cadmium and indium; tin and indium; thallium and gold; and indium and cadmium.ALSO:The following seven alloys are described as suitable jacket materials for stabilizing the temperature of an inner container at their melting points:- <TABS:0837002/II/1>
Patent GB-1089593-A (GB)
Title: Oxygenated derivatives of trimethylcyclododecatrienes
IPC: C11B9/00
Filed: 1966-05-10
Abstract: The invention comprises isomeric mixtures of monoepoxides corresponding with either Formula Ia or Ib, wherein one R is Me and the other is H, and one X is O and the other two are each p -bonds. <FORM:1089593/C2/1> <FORM:1089593/C2/2> They are prepared by reacting the appropriate trimethylcyclododecatriene with a peracid.ALSO:Perfume compositions comprise isomeric mixtures of monoepoxides corresponding with either formula Ia or Ib:  (Ia) <FORM:1089593/A5-A6/1> (Ib) <FORM:1089593/A5-A6/2> wherein one R is Me and the other is H, and one X is O and the other two are each p -bonds, besides conventional perfume ingredients.