baber/WOPTO huggingface dataset:
Patent GB-936713-A (GB)
Title: Improvements in and relating to transformer tap-changing systems
IPC: H01F29/04
Filed: 1962-03-26
Abstract: 936,713. Transformers. BROWN, BOVERI & CO. Ltd. March 26, 1962 [March 28, 19611, No. 11413/62. Class 38 (2). On load tap changing of transformer winding 31 is carried out with current gates 35, 36 connected in opposed parallel relationship, control of these gates being provided by rectified pulses from the pulse generator 37, the rotor of which is mechanically coupled to main switch 34, resistance switch 39, commutator switch 38 and current gate contacts 42, an independent preselector switch 40 also being provided in series with resistance 41. The sequence of operations for transferring load from tap 31c to 31d commences with the pre-selector switch being set at 40b, the main switch 34 then opens and current flows along the shunt path through switches 38, 42. Switch 39 closes, connecting tap 31d through the resistance to both the load and tap 31c, and the current gates each receive a firing pulse which lasts until the contacts 42 open, the arcing which follows at the contacts producing a temporary operating voltage across the current gates and the gate having a favourable instantaneous direction of voltage conducts, thus shorting out switch 42. When the voltage next passes through zero the conducting gate is cut off and the change-over switch passes from 38a to 38b without current flowing. Switch 42 now closes to complete the main shunt path from tap 31d and switch 39 opens to disconnect the resistance, the change-over terminating with the main change-over switch closing on to 34b. The pulses are generated in stator windings 21a, 21b, 22a and 22b of the pulse generator, the rotor being a permanent magnet. A second embodiment (Fig. 2, not shown) is designed to remove sparking at switch 39 and has a second pair of current gates connected in opposed parallel relationship with each other but in series with the resistance 41, the gates being fired by pulses from additional windings in the pulse generator.
Patent GB-900589-A (GB)
Title: Abrasive wheel composition
Inventor: GOEPFERT GEORGE JOSEPH
IPC: B24D18/00
Filed: 1960-03-31
Abstract: Abrasive granules coated with a filled condensation resin and adapted to be moulded to form a resin-bonded grinding wheel are made by wetting the abrasive granules with a bond-adhesionpromoting agent which is a liquid form of said condensation resin or an organic solvent having appreciable solvent power for said resin, or a mixture of solvent and liquid resin, mixing with the said wetted granules a quantity of said filled condensation resin in dry powder form to cause said granules to be coated with the dry resin, said powder being added in separate portions, adding water to wet the coated granules and any excess resin powder that may be present, incorporating a second portion of the dry powdered resin in the water-wet mixture to increase the thickness of the resin coating on said granules, the quantity of said added water being sufficient to cause said second portion of powdered resin to adhere to said coated granules and vaporizing said added water from said coated granules. It is preferred that the coated granules have a high ratio of resin to adhesive and a low volatility content.  The coated granules may be moulded under heat and pressure into a grinding wheel.  The abrasive used may be alumina, silicon carbide, diamond, zirconia, garnet or emery.  The coating resin may be phenol-formaldehyde, melamine-formaldehyde, urea-formaldehyde, aniline-formaldehyde or an epoxy resin.  Suitable solvents include furfural, cresylic acid, cresol, benzaldehyde, furfuryl alcohol and tetrahydrofurfuryl alcohol.  The dry solid powdered condensation resin is preferably mixed with a filler such as cryolite, calcium carbonate, iron pyrites, iron oxide, calcium sulphate, barium sulphate, silica, powdered organic synthetic resins such as cured phenolic resins and powdered thermoplastics, inorganic fibres such as asbestos and glass and organic fibres such as cotton and nylon.  If the coated granules are to be stored prior to moulding they may be coated with a conventional dusting powder such as silica gel, calcium silicate or magnesium silicate.
Patent GB-653857-A (GB)
Title: Improvements in and relating to autographic registers
IPC: B41L5/00
Filed: 1948-04-27
Abstract: 653,857. Autographic registers. LAMSON PARAGON SUPPLY CO., Ltd. April 27, 1948, No. 11523. Convention date, Sept. 20, 1947. [Class 106 (i)] [Also in Group XV] An autographic register of the portable type comprises a casing containing a pack of continuous stationery forms in the form of a web folded in zig-zag fashion in a compartment 7, the bottom plate 1 of the casing being provided with a transverse slot 10, one edge 11 of which is higher than the opposite edge 12 to retain record forms torn from the web after entries have been made thereon. The edge 11 may be bent upwardly or may be made thicker than the remainder of the plate 1. Inscribed record forms are inserted through the slot 10, an L-shaped slot also being provided in the base 1 to assist in arranging them smoothly in place. The web is drawn from the compartment 7 over a roller 6 across a writing plate 4, a spring- pressed pin 8 which engages perforations in the web being provided to position each length correctly. The web may be numbered at intervals so that when a record form is inserted into the compartment 7 the numbers are visible through an aperture in the bottom plate 1.
Patent GB-250768-A (GB)
Title: Improvements in distance pieces for use in securing rails to railway sleepers
IPC: E01B9/32
Filed: 1925-05-05
Abstract: 250,768. Guest, Keen, & Nettlefolds, Ltd., and Bayley, J. P. May 5, 1925. Chair keys. - Hornless distance pieces are made reversible, the inoperative rail bearings engaging the gap in the sleeper formed when the lug is pressed up. The distance piece 1 has projections 3 engaging over the rail base and separated by a central rib 5 which engages the side of the base flange. Either the rib 5 tapers with the other parts parallel, or the back of the distance piece is formed of two inclined surfaces as described in Specification 220,529, with the rib 5 parallel. The projections 3 are shorter than the distance piece which bears on the sleeper beyond the gap 12. In a modification, Fig. 7, the central rib is lightened by a groove 9 leaving ribs 10 which may be chamfered or cut away at their ends and centre, the end parts of the distance piece being reduced as at 13. Specification 240,363 also is referred to.
Patent GB-677669-A (GB)
Title: Improvements in belt needles for wire hook connections of conveyor belts or the like
IPC: F16G3/02
Filed: 1950-05-10
Abstract: 677,669. Belt fastening. ZILLER, H. May 10, 1950 [Oct. 1, 1948], No. 11685/50. Class 80 (i). A fastener for conveyer belts and the like of the type comprising a plurality of wire hooks clinched into the belt ends and interconnected by a hinge pin has a flexible hinge pin a of steel wire rope whose ends b, c are welded or soldered to prevent unravelling. Additional welded or soldered portions d, e, f are provided at regular distances along the pin so that it may be shortened as required by cutting off at a weld. In order to avoid a decrease in diameter at each weld, thin sleeves may be threaded on prior to welding, or be pressed on after welding. In a modification one or both ends of a hinge pin are welded or soldered along a stretch of considerable length.
Patent GB-567304-A (GB)
Title: An improved method of and apparatus for hardening metallic articles
IPC: C21D9/16
Filed: 1943-07-21
Abstract: 567,304. Electric heating. ELECTRIC FURNACE CO.. Ltd. (Ohio Crankshaft Co.). July 21, 1943, No. 11855. [Class 39 (iii)] [Also in Group II] In. the hardening of an elongated article having a nose end of tapering or diminishing form, e.g. a projectile, by inductive heating and quenching, the article is inserted into an inductor having a form corresponding generally to the shape of the article, with one end smaller than the other and to which current is supplied so as to cause a greater magnetic flux concentration in the nose part than in the rest of the article and then quenching fluid is directed axially into the smaller end of the inductor so as to impinge on the nose and then. flow over the surface of the article. The treated article may then be transferred to a second inductor extending peripherally around part of the article and current supplied thereto so as to heat that part and reduce the hardness in its surface zone. As applied to the treatment of a projectile, Fig. 4, the projectile is inserted into a receptacle 42 provided with a cylindrical helix 44 surrounding the projectile connected by a smaller conical helix 45 surrounding the nose to another helix 46, a quenching tube 73 being mounted on the top of the casing 42. In dealing with a plurality of projectiles, the projectiles 34 are mounted on pins 33a on support 33 carried by a plate 32 mounted on the piston-rod 26 connected to a piston 22 working on a cylinder 16 and guided by rods 30. Mounted directly above each pin 33a are inductor assemblies such as 40, 40a mounted on a plate 41 and current is supplied to the inductors from bus-bars 50, 51. The hollow inductors are supplied with cooling water from a manifold 60, by rubber pipes 63 connected to valves 64 in turn connected to the manifold 60. Quenching water is supplied from a manifold 70 by pipes 73 to valves 74 for each inductor.
Patent GB-513801-A (GB)
Title: Improvements in or relating to the production of cation exchange or removal substances
IPC: B01J39/24
Filed: 1938-04-20
Abstract: 513,801. Purifying liquids. PERMUTIT CO., Ltd. April 20, 1938, No. 11913. Convention date, April 20, 1937. [Class 46] Base-exchange material suitable for use in softening water is obtained by treating carbonaceous material with one or more sulphur or phosphorous acids or acid anhydrides in the presence of an oxidizing agent and/or an oxidation accelerator, which is a compound of chromium, aluminium, manganese, cobalt, nickel or iron. Wood, straw or other cellulose-containing. substance, cork, charcoal, peat, brown. coal, bituminous coal, anthracite, partly-coked coal, pitch, tar, sugar, dextrin, organic acids and their salts, fats and their acids, thickened sulphite liquor and soap are mentioned as suitable carbonaceous materials. As oxidising, agents, nitric acid, chromic acid, permanganates or persulphates may be used. The oxidation accelerators are preferably used in the form of anhydrous salts. An inactive and preferably absorbent carrier may be added to the carbonaceous material before, during, or after the reaction. Specifications 450,574 and 492,316 are referred to.
Patent GB-552060-A (GB)
Title: Improvements in or relating to apparatus for cleaning bobbins
IPC: B65H73/00
Filed: 1941-09-18
Abstract: 552,060. Bobbin cleaning apparatus. BRITISH CELANESE, Ltd. Sept. 18, 1941, No. 11968. Convention date, Nov. 8, 1940. [Class 120 (iii)] [Also in Group XXVIII] A device for cleaning flanged bobbins comprises a series of centering clamps 48 engaging the ends of the bores of the flanged bobbins 11 so as to leave the outer surfaces of the flanges free, the clamps and the bobbins being moved past cleaning brushes 66 - - 69 which contact and clean all the surfaces of the bobbins. The bobbins are held by the clamps so that they are freely rotatable under the action of the brushes. The brushes are rotated by motors 71 and aTe mounted upon platforms 74 by which they can be reciprocated horizontally; some of the platforms 74 and motors and brushes carried thereby are also reciprocated vertically. The bobbins are fed from a vertical chute 12 by a cam-operated arm 29 into slots 28 in the circumference of spaced plates 27 forming a rotatable carrier for the bobbins and upon which the clamps 48 are mounted. The clamps are pivotally mounted and are held open by a stationary cam 50 which finishes at the feeding point of the bobbins. The cam 50 engages the clamps after the bobbins have passed the last brush 69 so that the clean bobbins drop to a discharge chute 111. Air ducts 91, 104, 105, 106 catch the dirt which is brushed from the bobbins, and a suction fan 92 is provided for discharging the dirt from the ducts through a discharge duct 96.
Patent GB-1112620-A (GB)
Title: Route selection arrangement for use in a telecommunication exchange
IPC: H04Q3/00
Filed: 1966-03-18
Abstract: 1,112,620. Automatic exchange systems. INTERNATIONAL STANDARD ELECTRIC CORPORATION. 18 March, 1966 [24 March, 19651, No. 11978/66. Heading H4K. In a partially sectionalized multistage reed relay or crossbar switching network through which a path is selected by means of a route simulation network, the route finding wires, between two stages, of each section including these stages are commoned on to a single set of route finding wires whereby the number of steps, to be taken by a one-only selector during the process of finding a unique path between these stages is drastically reduced. As shown in Fig. 6, the switching network may comprise two separate AB sections B4 and B5 and two separate CD sections B6 and B7, the multipling in the BC section being such as to provide the network with full availability with four possible paths between each inlet and outlet. Each of the four A matrices is a 10 x 2 crosspoint switch, the B matrices are 2 x 4 switches and the C and D matrices are respectively 4 x 2 and 2 x 2 switches. The simulation network (Fig. 7) comprises a common set of wires Sb1 in respect of the two AB sections and another common set Sb3 in respect of the two CD sections. (The number of wires in a common set is equal to the number of links in the section containing the largest number of links. A similar commoning occurs at Sb2 for the BC stages but in this case additional switches 6IV-6VII are provided for preventing ambiguity in the result of the one-only selection for this part of the network. Thus if inlet e.g. 40 of section B5 and outlet ag2 of section B6 are marked during a route finding operation, additional switches bV and bVI are closed so that route finding is confined to those BC links drawn in heavy lines in Fig. 6. The results of the selection for common sets Sb1 and Sb3 are in fact unambiguous but additional switches (those shown between Sb3 and the outlets) may be provided to remove any possibility of ambiguity. A suitable diode/transistor logic which selects one wire from each common set by a succession of blocking operations is briefly described.
Patent GB-400955-A (GB)
Title: Improvements in or relating to electric power-transmission systems
IPC: H02P9/00
Filed: 1932-04-26
Abstract: 400,955. Systems for transmitting mechanical power. BRITISH THOMSONHOUSTON CO., Ltd., Crown House, Aldwych, London, ORCHARD, H., 30, Claremont Road, and JAFFREY, J. A., 290, Regent Street, both in Rugby. April 26, 1932, No. 11987. [Class 38 (iv).] In a power-transmission system comprising a generator 1 driven by a prime mover supplying a motor 8 and having a shunt field winding 4 supplied from an exciter generator 2, a voltage relay or relays operable automatically according to the voltage of the main generator are provided for varying a resistance 109 in series with a field winding 7 of the exciter generator and a resistance 9 in series with the main generator field winding in such a manner that the main generator supplies energy at approximately constant horse power. The exciter may be provided with a field winding 6 which is in series in the circuit of the main generator 1. To allow engine speeds lower than normal to be used the voltage settings of the relays may be altered.
Patent GB-252354-A (GB)
Title: Improvements in or relating to methods of operating blowers or compressors
IPC: F01K3/18
Filed: 1926-05-10
Abstract: 252,354. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitdts Ges.). May 23, 1925, [Convention date]. Void [Published under Sect. 91 of the Acts]. Feedwater, heating.-Water, used for cooling compressed air in blowers or compressors, is utilized as feedwater for steam boilers. Steamengine condensate from an engine driving the compressor can be used as the cooling medium.
Patent GB-641636-A (GB)
Title: Improvements in and relating to saws used for felling trees
IPC: B23D49/14
Filed: 1948-05-04
Abstract: 641,636. Saws. JIRIKOWSKI, G. May 4, 1948, No. 12208. [Classes 61(i), 61(ii) and 145 (ii)] A saw for felling trees cuts on pulling action only and comprises two alternative, curved blades 1 having wedge-shaped teeth 2, the points being directed towards the handle and the teeth of one blade being sharpened on their flanks to an angle of approximately 60 degrees for soft wood and of the other to 50 degrees for hard wood, and a handle 3 adjustably inclined to the blade. The blade is received in a slot in the handle and held by a fixed screw 4 and a removable screw 5 which engages in one of the two bores 6 in the blade. In a modification, Fig. 4, the handle 3<SP>1</SP> is pivoted at 8 to the blade 1<SP>1</SP> which is reinforced at 9. A pawl 12 mounted in a slot in the handle is spring-urged to engage with teeth 10 at the end of the blade. Pressure on a thumb-piece 16 lying in the slot 17 withdraws the pawl from the teeth to release the handle. A pin 19 moving in the slot 18 limits the pivotal adjustment of the handle.
Patent GB-952331-A (GB)
Title: Photographic camera
Inventor: NOACK ROLF
IPC: G03B7/06
Filed: 1960-04-06
Abstract: 952,331. Photographic cameras. KAMERAUND KINOWERKE DRESDEN VEB. April 6, 1960, No. 12210/60. Heading G2A. A photographic camera having means for receiving an interchangeable objective lens provided with a built in diaphragm includes a rotatable exposure factor setting ring connected to two control cams adapted for controlling the diaphragm aperture and shutter speed adjusting mechanism respectively through two push-rods resiliently urged against the control cams. As shown, the setting ring 6 has cams 5,7 engaged by push rods 4,8 operating respectively the diaphragm and shutter speed mechanisms. Over the cam region A, the diaphragm aperture and shutter speed are alternately altered to change progressively the exposure as the follow-up pointer 13 is brought into coincidence with the needle 16 of the exposure meter, while over the region B a constant shutter speed setting is provided and the diaphragm setting is selected for flashlight exposure by setting an appropriate distance scale value 18 on the ring 6 in accordance with a scale 19 of flash guide numbers on the camera body. In this range of settings, the follow-up needle is pivoted out of the window 17 of the exposure meter.
Patent GB-138656-A (GB)
Title: Improvements in the propellers of aircraft
IPC: B64C11/04
Filed: 1918-07-27
Abstract: 138,656. Thomas, G. H., and King, E. P. July 27, 1918. Screw propellers.-The outer portion of the blade of an air-screw is made of metal and secured to an inner portion and ordinary wood or like boss. The blade, Fig. 1. has a metal portion a of section shown in Fig. 3, and has a socket to fit on the arm c (of section shown in Fig. 2) formed (in one) with central hub d, the two parts being secured by riveting the extended parts f, g to the arm c and, if desired, by tape also. The outer portion may be made in aluminium, duralumin, or steel. The extensions may be lengthened to reach the hub and are secured by the hub bolts. Alternatively, metal tension straps may be secured to the hub and to the metal portion a, and if separate straps are used for each blade, these are secured to the hub and interlocked with each other.
Patent GB-423552-A (GB)
Title: Improvements in amplifiers for use in wireless receiving sets and other purposes
IPC: H03F1/33
Filed: 1934-04-25
Abstract: 423,552. Wireless receiving-apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. April 25, 1934, No. 12497. Convention date, June 21, 1933. [Class 40 (v)] In an amplifying arrangement using a plurality of tuned circuits with waveband switching, a condenser C is arranged in series with the switch contacts in one of the circuits so that this circuit is slightly detuned when operating on the shorter wave band. The tuning of the receiver is thus widened to avoid loss of high tones on this band.
Patent GB-514115-A (GB)
Title: Manufacture of substituted anthraquinones and aroyl-benzoic acids
IPC: C09B3/00
Filed: 1938-04-27
Abstract: 514,115. Anthraquinone derivatives and aroylbenzoic acids. I.G. FARBENINDUSTRIE AKT.-GES. April 27, 1938, No. 12575. Convention date, April 27, 1937. Addition to 511,965. [Class 2 (iii)] Aroylbenzoic acids are made by condensing in presence of an acid condensing agent a primary amine containing four condensed nuclei or a derivative or salt thereof with phthalic anhydride or a substitution product thereof, and if desired the products are ringclosed to the corresponding anthraquinones as a separate operation or in continuance of the primary condensation. In examples, phthalic anhydride is condensed in a sodium chloridealuminium chloride melt with (1) 2-aminochrysene, (2) 4-aminofluoranthene, (3) 3- aminopyrene to give an amino-phthaloylchrysene, -fluoranthene or pyrene.
Patent GB-1123393-A (GB)
Title: Improvements in or relating to active tank stabilizers for buoyant bodies
Inventor: BELL JOHN
IPC: B63B39/03
Filed: 1966-03-22
Abstract: 1,123,393. Ship stabilizers. MUIRHEAD & CO. Ltd. 23 Jan., 1967 [22 March, 1966], No. 12580/66. Heading B7M. An active-tank type of stabilizer for a ship 1, or other buoyant body, includes a pair of tanks 2, 3 situated on either side of the ship and connected to each other by a channel system 4 containing a partition with a central opening therein in which an impeller 5 is lodged, the flow of liquid from one tank to the other being regulated by valves 7-10 such that the liquid always flows upwardly through said opening, and, to minimize the energy expended by the impeller, the natural frequency of the stabilizer being made equal to the highest frequency of the ship's oscillatory motion that is likely to occur when the ship is rolling. The stabilizer may be rendered of the passive-tank type by disconnecting an electric driving-motor 6 for the impeller from its source of energy, closing either the valves 7, 9 or the valves 8, 10 and opening the other two valves.
Patent GB-1497224-A (GB)
Title: Magnetisable storage medium
IPC: G11B5/702
Filed: 1975-03-26
Abstract: 1497224 Magnetizable compositions AGFAGEVAERT AG 26 March 1975 [27 March 1974] 12646/75 Heading C3R A magnetizable storage medium comprises a flexible support and pigment- and bindercontaining layer(s), wherein the binder consists, by wt., of: #70% of an acid-catalysed reaction product of a polyurethane elastomer free from terminal -OH and -COOH groups, and a melamine-formaldehyde or benzoguanamineformaldehyde condensate; and #30% of a non-reactive polymer. The magnetizable pigment may be, e.g. Fe 2 O 3 , Co-doped Fe 2 O 3 , or CrO 2 , in amount 65-77% wt. based on total layer; optionally non-magnetizable pigment may be present, e.g. silica or C black, e.g. 10-35% wt.
Patent GB-473475-A (GB)
Title: Improvements in or relating to joints in tubular cycle frames
IPC: B62K19/24
Filed: 1937-05-04
Abstract: 473,475. Cycle frames. HORNEMAN, B. May 4, 1937, No. 12660. [Class 136 (iii)] [Also in Group XXVIII] In jointing a thin cycle-frame tube 1 to a union member 4, the end of the tube is first formed with narrow longitudinal recesses 2, and the relatively wide tube surface portions 2a between the recesses are then screw-threaded to engage a like thread in the union. The tube end may be strengthened by bent-in lips 3 at the ends of the portions 2a, and the union is preferably provided with a plain or unthreaded extension 5 for engagement with the tube beyond the recesses 2.