baber/WOPTO huggingface dataset:
Patent GB-288559-A (GB)
Title: Improvements in or relating to continuous current transformers
IPC: H02K47/16
Filed: 1927-08-10
Abstract: 288,559. Constructions Electriques de France. April 12, 1927, [Convention date]. Rotary transformers; commutating windings. - A continuous - current transformer having two o separate commutator windings on a single armature is provided with commutating poles each having two opposing windings 1, 2 connected respectively in series with the two armature windings. In steady conditions the effect of winding 1 connected in series with the motor winding is slightly predominant, but during variable conditions, i.e. at starting or with change of load, one or other of the two predominates so that the variations in the armature field are compensated for. The main field is excited by a winding 3 in series with the motor armature and a winding 4 in shunt with the generator armature. To minimize the effect of the mutual inductance between windings 3, 4 a reactance 5 may be provided as shown in Fig. 2, whereby the main flux is able to follow rapidly the variations of the series ampereturns under variable conditions of load.
Patent GB-195908-A (GB)
Title: Improvements in pruning shears
IPC: A01G3/02
Filed: 1922-08-02
Abstract: 195,908. Jardine, C. A. Aug. 2, 1922. Hand shears.-Prun- 'ing shears or secateurs of the kind having a convex blade D working against a concave guard E or a concave blade, the blade D is formed with a concave portion d at or near the apex or point where the blades meet such concave portion gradually merging into the convex portion d<1> and forming, when the shears are opened, a more or less circular cavity between the blade and guard or between the two blades at the apex. In a modification a second concave portion may be formed in the blade D between the convex portion d<1> and the tip f.
Patent GB-1223104-A (GB)
Title: Improvements in or relating to loading units for machine tools
IPC: B23Q7/14
Filed: 1967-05-05
Abstract: 1,223,104. Workpiece and tool transferring. MOLINS MACHINE CO. Ltd., D. T. N. WILLIAMSON, and W. WOOD. 2 Aug., 1968 [5 May, 1967], No. 21105/67. Heading B3B. The Specification relates to a loading unit as described in related Specification 1,223,103, but the claims are directed to a pallet loader for use with a single spindle machine tool comprising means for separating a pair of connected workpiece pallets from each other for feeding a single pallet into the machine tool and retracting it therefrom. A pair of pallets are carried by a paddle to a delivery position relative to a machine tool whereat one of a pair of pushers 627, 628 are operated to rotate an arm 614 which acts through rollers and cams to raise or lower a half of the paddle relative to its other half to separate or engage one pallet from or with its related pallet.
Patent GB-462274-A (GB)
Title: Improvements in plastic compositions and articles made therefrom
IPC: C08L81/00
Filed: 1936-07-31
Abstract: Plastic compositions are prepared comprising an olefine polysulphide plastic and a plastic elastic reaction product of an aromatic hydrocarbon of the formula R--C6H4--R<1> (wherein R and R<1> represent hydrogen or a saturated aliphatic hydrocarbon radical containing more than one carbon atom) with about one to three molar proportions of ethylene dichloride, the olefine polysulphide plastic being preferably in excess.  In tables, physical properties of compositions containing an olefine polysulphide plastic and rubber or the plastic elastic reaction product together with tetramethylthiuram disulphide, zinc oxide, carbon black and zinc oxide with or without the addition of diphenylguanidine, are compared. Specification 407,948 is referred to.
Patent GB-225177-A (GB)
Title: Improvements in cooling systems for thermo-electronic apparatus
IPC: H01J19/36
Filed: 1924-09-10
Abstract: 225,177. British Thomson-Houston Co., Ltd., (Assignees of Baker, W. R. G.). Nov. 21, 1923, [Convention date]. Vacuum tubes.-In a circulating-liquid cooling system for a discharge tube adapted to be immersed wholly or partly in a chamber through which the liquid flows and which is located below the liquid head, a valve mechanism controlling the supply of liquid is interlocked with a switch so that the circuit is closed when the valve is opened and conversely. As shown in Fig. 1, the radiator 2 is connected through a pipe 8 and a valve 9 with a chamber 6, in which the anode of the thermionic tube 7 is immersed. The other end of the chamber 6 is connected through a valve 10, a flow indicator 12, and a pipe 13, with the pump 3, which is driven through an insulating coupling 27 by a motor 4 insulated from a base which is mounted on insulators 1. A thermometer 16 is mounted in or against the return pipe 34 from the pump to the radiator. A valve 15 is arranged in shunt to the pump, and is normally closed, but may be opened so that water may pass from the pipe 13 to the return pipe 34 without passing through the pump. The valves 9, 10 are interlocked by means of an arm 17 from which projects a lever 18 carrying the blade 19 of a knife switch in the anode circuit. When the valves 9, 10 are closed the switch 19 is opened, and the tube may be removed from the chamber 6 without loss of water from the system. The tube is mounted in the chamber 6 by means of a collar 23, Fig. 2, at the end of the anode 21, engaging with a clamp 2 consisting of two sliding strips 24, 25 which are pressed against the collar bv a screwed head 26. In order to prevent a discharge outside the tube between the anode and the grid terminal 28 or a cap 29, the head is shaped so as to extend outwards, and is formed with a rim from which any discharge takes place.
Patent GB-136894-A (GB)
Title: Improvements in Helmets or Caps.
Inventor: WILLIAMS WILLIAM
IPC: A42B1/24
Filed: 1918-12-21
Abstract: 136,894. Williams, W. Dec. 21, 1918. Helmets; caps; accessories.-A helmet or cap with luminous devices, primarily for use in shipwreck at sea, is provided with waterproof flaps d for the ear, pockets h, g with flaps h<1>, g<1> for electric lamps and batteries or other materials, a chain strap c, and an elastic band b. An oilskin covering f renders the helmet waterproof.
Patent GB-281026-A (GB)
Title: Improvements relating to electric switches
IPC: H01H19/46
Filed: 1926-08-31
Abstract: 281,026. Anderson, J. Aug. 31, 1926. Charging and discharging condensers.-In stepby-step control mechanism for an electric circuit, resistances or condensers, graded in value as terms of a geometrical progression, are disposed in series as shown in Fig. 1, and are connected in groups to stationary contacts of a number of multipoint switches i each of which has a movable contact j arranged to bridge pairs of the stationary contacts. By operating the switches in suitable order, successive amounts of resistance &c. rangging from the smallest to the greatest may be put in the circuit to be controlled. The switches are preferably interconnected by Geneva stop gearing, and are provided with step-by-step snapmechanism as shown in Fig. 2. The operating handle m mounted loosely on the spindle of the left-hand switch, when turned in either direction, strains a spring t and after a certain amount of lost motion releases one of the detents z previously engaging teeth on a disc r which is attached to the movable switch-contact. To prevent the handle from being turned further in the same direction after all the switches have been fully operated, stop-levers 47 are urged by a spring 48 into the path of a gapped ring v, the levers being held out of action by abutments 49 co-operating with notched discs on the switch spindles until all are in their fully operated positions. In a modification the condensers or resistances are disposed in parallel and the stationary contacts are arranged in groups of four, of which one is a dead contact, with a movable contact to connect them three at a time.
Patent GB-1117355-A (GB)
Title: Display device
IPC: G09F11/26
Filed: 1965-05-20
Abstract: 1,117,355. Display device. F. IRONMONGER. 20 May, 1966 [20 May, 1965], No. 21455/65. Heading G5C. An endless band 10 wound on rollers 13 and 14 within an apertured casing 12 details alternative sequences of events, e.g. so that at any time all television or radio programmes available are visible through the aperture, the band being progressed by an electric motor and one or more audible or visible devices being provided to be triggered, e.g. by the motor, at a time selected to focus attention on a selected programme. A time scale may be progressed alongside the chart to be visible through the aperture. A window 11 may magnify the visible section of the band and a light source 21 may illuminate the chart.
Patent GB-176394-A (GB)
Title: Improvements in locking devices
IPC: E05B47/06
Filed: 1921-04-19
Abstract: 176,394. Filby, C. W. April 19, 1921. Electrically - controlled fastenings.- Relates to railwaycarriage door and like locks of the kind in which a spring bolt held in the locking position by means of a catch adapted to be withdrawn by the completion of an electric current by the driver or other authorized person. According to the invention, the pivoted catch h engages a lever e which is carried by the spindle e<1> of the operating-handle e<3> and bears on a shoulder d<2> on the spring bolt d to retract this where the handle is turned. The catch is lifted out of locking engagement with the lever by an electromagnet m. The catch may be made with a tail extension h<2>, and a key n<6> provided to bear on this tail and deflect the catch in independently of the electromagnet.
Patent GB-144153-A (GB)
Title: Improved safety coupling pin
IPC: B61G1/28
Filed: 1919-09-03
Abstract: 144,153. Gould, V. Sept. 3, 1919. Couplings, non-automatic. - In couplings for trains, of the kind in which a shackle-pin B provided with an enlarged base A and flattened head works in slots in the arms of a D-link, the upper part of the pin is reduced at C forming a shoulder which, when the coupling is in tension, engages with the underside of the slot in the upper arm and thus reduces the risk of the coupling being accidentally released through jolts.
Patent GB-324374-A (GB)
Title: Process for reclaiming plaster of paris
IPC: C04B11/02
Filed: 1928-07-26
Abstract: 324,374. Aische, M. I. July 26, 1928. Calcium sulphate. - Used plaster of Paris is washed with running water to remove soluble impurities, and then calcined at 90-500‹ C. to render it fit for re-use. Acids or salts, for instance sulphurous or sulphuric acid, selenious or selenic acid, or phosphoric acid, or their acid or neutral salts, may be added to the water used to assist removal of, or to precipitate in a desired form, insoluble impurities present. The washing step may be followed by maceration in water with or without addition of gypsum, calcium hydrate an alkali silicate, a phosphate, &c., and prior to calcination, strengthening, dehydrating or hydrating agents, or deliquescent salts, for instance, an alkaline earth silicate or aluminate, aluminium chloride or double chloride, or an alum may be added. According to the provisional Specification, when the used material is free from impurities, it may be regenerated by calcination only.
Patent GB-170392-A (GB)
Title: Improvements in spring balances
IPC: G01G3/08
Filed: 1920-07-19
Abstract: 170,392. Coker, E. G. July 19, 1920. Spring balances.- Flat or curved plate springs designed by photo-elastic measure ments are used in spring balances. In the form shown in Fig. 1, the spring is made in symmetrical halves A, B varying in thickness to obtain as uniform stress as possible under load, the dimensions of the spring being determined by photo-elastic measurements. The load support D and the balance support C are secured bv screws and terminate in racks E. F engaging a pinion G. The movements of the pinion are transmitted to an indicating pointer O by means of a rod J and a quadrant M. In a modification the springs A, B are in compression, the load being supported in a pan at the top. In a further modification, Fig. 2, the springs are elongated transversely. Stops are provided to prevent overloading, for example, a link-and-pin device R, S, or stops T with adjustadjustable nuts T'.
Patent GB-283608-A (GB)
Title: Improvements in optical apparatus for avoiding the effects of dazzle of motor vehicle lamps and the like
IPC: F21S8/10
Filed: 1926-09-03
Abstract: 283,608. Taylor, H. D. Sept. 3, 1926. Spectacles; colour screens.-Dazzle by the lamps of motor vehicles &c. is prevented by the use of light - screening arrangements involving three separate panels or screens, one transparent to white light, one to a colour substantially red, and one to a colour subetantially bluegreen. The colour filters are made in the form of spectacles for personal wear in conjunction with similar screens fitted to the vehicle lamps. The spectacles comprise a frame in which the bridge is brought back so that the colour filters are held about one inch away from the pupil of the eye. The upper part of the spectacle lens is a blue filter, the lower red, and the central portion, clear glass. When the filters are of gelatine they are provided with protective glasses which may be ground to suit the vision of the wearer. The central portion of the spectacles may be further divided into two strips one clear and the other opaque or dark neutral tinted, for preventing dazzle by an unscreened approaching light. Tables of appropriate colour filters and screens are given in the Specification, together with their absorptions and other particulars.
Patent GB-169689-A (GB)
Title: Improvements in method and apparatus for signalling by means of electric lamps
IPC: G08B5/38
Filed: 1921-08-16
Abstract: 169,689. McMillan, L. Sept. 28, 1920, [Convention date]. Road-traffic signals on vehicles; flash signals.- In a method of signalling intended changes in the speed or direction of a vehicle, a three-position switch is arranged so that in its normal position all the vehicle lights are illuminated while in its other positions the lights on one side only are illuminated. During movement of the switch from normal to either abnormal position all the lights are flashed intermittently. An auxiliary arrangement provides for the extinguishing of all but the red tail light. In the example illustrated, the switch is housed in a casing 1 with an end plate 5 of insulating material carrying terminals 44, 45, 35, 36. The terminals 35, 36 are connected respectively to two semi-circular plates 33, 34 adapted to be connected together in all positions of the switch by three contact arms 32 connected together and carried by the shaft 21 but insulated therefrom. The terminals 44, 45 are connected to two conducting half rings 37, 38, embedded in the plate 5 and having projecting contacts 39, Fig. 7, at intervals round them and contacts 42, 43 on extensions 40, 41. A circular plate 8 carries contact fingers 16, 17, 18 connected to it and to each other, of which 16 and 17 engage the contacts 39, and 18 the contacts 42 or 43. The plate 8 is rotated by a head 13, the motion of which is limited by the pointer 15 co-operating with a stop pin on the casing 1. The plate 8 is latched in its three positions by a spring-pressed ball 49. With the switch in its normal position, the plate 8 connected to the battery lead 58 is connected bv the contact fingers 17, 18 to the top contact 39 of the plate 38 and the bottom contact 39 of the plate 37, all the lamps 53 - - 56 being thus lighted. When the head 13 is turned to the left all the lamps flash owing to the intermittent engagement of fingers 17, 18 with the contacts 39. In the final poeition the fingers 17, 18 make no contacts but the finger 16 engages contact 42 thus allowing the lamps 54, 55 only to be lighted. Turning the switch to the right similarly lights the lamps 53, 56. To return the switch to normal without flashing the lamps, the lead 13 is lifted against the spring 12 thus disengaging the fingers 16, 17, 18 from their contacts. When it is desired to illuminate only the red tail light 55, the head 13 is turned to the left extreme position and the head 22 is lifted against the spring 30 and given a half turn so that the pin 23 which normally resides in a recess in the head 13 now rests on its surface. The plates 33, 34 are thus disconnected from each other by the lifting clear of the contact arms 32.
Patent GB-1048181-A (GB)
Title: Improvements relating to electrically heated boiling and heating plates
Inventor: OATLEY ARTHUR FREDERICK
IPC: F24C15/10
Filed: 1962-06-06
Abstract: 1048181 Electric hot-plates OATLEY TECHNICAL DEVELOPMENTS Ltd 27 May 1963 [6 June 1962] 21823/62 Headings F4W and W18B13 A bezel assembly for use with a boiling and heating plate of the tubular sheathed radiant type 14 which can be raised vertically or about a hinged joint comprises a bezel ring 19 and element supporting bars 21 adapted to support the element by being interposed between the element and the reflector or spill tray 27, bars 21 being hinged to ring 19 about a horizontal axis so that the whole of the element engaging surface of the bars lies to one side of the hinge axis, the arrangement being such that the assembly can be removed from the element (which is raised if necessary) by tilting ring 19 and withdrawing the assembly laterally, hinge side first. Bars 21 comprise a spider having three radial arms.
Patent GB-1046577-A (GB)
Title: Improvements in and relating to compressed gas blast circuit breakers
IPC: H01H33/82
Filed: 1965-05-24
Abstract: 1,046,577. Gas blast switches. BROWN BOVERI & CO. Ltd. May 24, 1965 [May 25, 1964], No. 21824/65. Heading H2B. In a gas blast circuit-breaker of the kind having a tubular movable blast valve member 4 surrounding and supporting a plurality of resiliently mounted contact members 7 for bridging a pair of fixed nozzle contacts 1, 2, the valve member 4 co-operates with a valve disc 9 mounted upon and slidable over a short distance along one nozzle 2. The space within the nozzles 1, 2 is at low pressure while the surrounding space is at high pressure. To initiate opening a space 6 is vented causing the high pressure to drive valve member 4 upwards against a spring 5. Since a space 2a is at the low pressure the high pressure on the underside of a piston 9a attached to valve disc 9 causes the latter to follow the valve member 4 upwards until it strikes an abutment on nozzle 2. The member 4 having achieved an appreciable speed, the valve opens initiating the blast. Since space 2a is then filled with high-pressure gas while a space 2b on the other side of a second piston 9b remains at low pressure the valve disc 9 is driven back to its initial position.
Patent GB-317971-A (GB)
Title: Improvements in and relating to glazing, roofing and the like
IPC: E04D3/08
Filed: 1928-07-27
Abstract: 317,971. Lane, L. July 27, 1928. Glazing.-An astragal or like jointsupporting bar A, Fig. 3, for roofs or walls consisting of flat sheets of glass, asbestos, or the like, comprises a web 10, flanged base 11, sheet supporting flanges 12, end an enlarged head 13 which forms with the supporting flanges 12 a recess in which lie the edges of the sheets 15 and a surrounding sealing strip 14, preferably of asbestos, wool, or the like, saturated with a substance such as asphalt having a melting temperature of over 200‹ F. The capping 16 of channel form is secured by screws and has a line contact with the sealing strip or with an additional metal cap 314. At the base of a wall or ridge of a roof a bar B is used, Fig. 2, the sheet resting in a recess on the support 21 and being secured by a clip 123 outside and spaced from a plaster board or like wall material C. The sheet material may have sealing material permanently secured thereto in manufacturing with vertical joint-bars A, Fig. 3, a channel strip 314 is applied over the bar and edges of the sheets and secured by capping 16. The sealing strip 14 may be doubled. The edges 17, and 123 of the cappings are offset inwardly to engage the sealing strip adjustably.
Patent GB-1305824-A (GB)
IPC: G02F1/31
Filed: 1970-05-06
Abstract: 1305824 Light beam deflection system HONEY WELL Inc 6 May 1970 [11 July 1969] 21937/70 Heading G2J A light beam deflection system comprises a first light beam deflector 12 adapted to receive an incident light beam 10 and to deflect the beam selectively so as to form a plurality of first resolvable spots, light directing means, for example a fly's eye lens 14, so as to produce from the first spots real or virtual second resolvable spots 11 reduced in size, and a second light beam deflector 20 positioned to intercept light from any of the second spots and to deflect it to at least one additional resolvable position between any two adjacent positions of beams from the second spots. Thus the total numbers of spots that can be produced in a display plane 24 is equal to the product of the number obtainable from each deflector separately. For optimum results the number of elements in the lens 14,which may be of plastics material, is equal to the numbers of first spots. In order that the light from each of the second spots be directed to the same area in deflector 20 a lens 16 may be provided at a distance equal to or greater than one focal length from the plane 15'containing the second spots. If the lens 16 is omitted the incident plane of the deflector 20 is preferably placed at the focal plane of the fly's eye lens 14. In a modification, Fig.2, (not shown), the light source (30) may be a laser, the beam 10 from which is increased in width by lenses (32) and (34), and the lens 16 is at a distance of the focal length from the plane 15' so that the rays from it are parallel, and a further lens (44) is positioned adjacent the deflector 20 to focus the beam within the deflector. In a further modification, Fig.3, there are two deflectors 50 and 52 for deflecting the beam W in X or Y directions, which may be perpendicular, an array 54 of lens elements, the images for which are each focussed on the same area of a further X deflector 60 by a field lens 56 and then passed via a further Y deflector 62 to display plane 24. Further field lenses (not shown), may be provided between deflectors 50 and 52 and between deflectors 60 and 62 and there may be a converging lens prior to each of the deflectors 52, 60 and 62, analogous to the lens (44) in the previous embodiment. The light beam deflectors may be mechanical deflectors, such as rotatable mirrors, or electro optical deflectors responding to an applied electric or magnetic field.
Patent GB-446659-A (GB)
Title: Improvements in or relating to the production of protective coating compositions
IPC: C09D101/18
Filed: 1934-07-26
Abstract: A protective coating-composition comprises a mixture of cellulose nitrate and the fluid oxidized oil component or fluid oxidized oilresin component described in the parent Specification in a common solvent.  Pigments, fillers, or dyes may be incorporated in the composition.  The fluid oxidized oil component or oxidized oil resin component is obtained by extraction with suitable solvents of the oxidized oil or oil-resin.  It is composed chiefly of the oxidized glycerides of linolenic and linolic acids.  The ratio of this component to cellulose nitrate is 2--6 to 1, preferably 3 to 1.  The cellulose nitrate employed is a usual solution of \ba1/2\be second cotton.  Examples of compositions according to the invention are: (1) cellulose nitrate 10 per cent; separated component of oxidized linseed oil-ester gum mixture 30 per cent; solvent 60 per cent, and (2) cellulose nitrate 5 per cent; separated component of oxidized linseed oil-ester gum mixture 15 per cent; titanium dioxide 7,5 per cent; lithopone 7,5 per cent; solvent 65 per cent.  The solvent consists of butyl acetate 20 per cent; butyl alcohol 20 per cent; ethyl acetate 10 per cent; ethyl alcohol 5 per cent; toluene 45 per cent.  The oxidized oil component and the cellulose nitrate may be dissolved separately and the solutions combined.