baber/WOPTO huggingface dataset:
Patent GB-309959-A (GB)
Title: Improvements in and relating to electrical frequency changers
IPC: H02K47/20
Filed: 1929-04-18
Abstract: 309,959. British Thomson-Houston Co., Ltd., (Assignees of Merrill, F. W.). April 18, 1928, [Convention date]. Rotary transformers.-The invention relates to frequency changers of the type described in Specification 302,904. According to the prior Specification, a frequency changer comprises a machine having single stator and rotor elements, and the primary element, usually the stator, is provided with independent motoring and generating windings while the rotor carries some form of starting winding and, in addition, is provided with polar salients which co-operate with the motoring winding to produce synchronous rotation and also set up a flux which generates currents of higher frequency in the generating winding. A rule is deduced that the number of generating polar salients on the rotor is equal to the frequency conversion factor minus one. Therefore, to change from CO to 120 cycles with a motoring winding wound for two poles, the rotor would have only one generating salient and this design would be impracticable on account of the absence of mechanical balance and insufficiency of synchronizing torque. In accordance with the present invention, the rotor is provided with the proper number of generating salients as determined by the rule given and in addition with auxiliary polar salients so distributed as to balance the rotor and to provide a return path for the generating salient flux, but arranged so that their generating influence in the generating winding cancels at every instant. As shown applied to a machine changing from 60 to 120 cycles, the stator 11 is provided with a two-pole motoring winding 10 connected to terminals 12 and a four-pole generating winding 13 connected to terminal 14. The rotor has a repulsion motor starting winding 15 which is completely short-circuited at synchronism and acts as a damping winding. The rotor has also one main generating salient 19 comprising eight complete teeth, and also two auxiliary salients 20, 21 comprising four complete teeth each, the intermediate teeth being cut off. Fig. 2 shows diagrammatically the spacing of the stator windings 10 and 13, and also shows in degrees the spacing of the rotor salients. With the arrangement shown, the machine will rotate synchronously at 3600 r.p.m., salient 19 constituting one pole and salients 20, 21 together the opposite pole, and the resultant effect of the salients 20, 21 on the generating winding 13 will be zero.
Patent GB-418513-A (GB)
Title: Improvements in or relating to leather or like splitting, skiving or like machines
IPC: C14B1/14
Filed: 1933-04-26
Abstract: 418,513. Splitting and skiving machines for leather &c. BRITISH UNITED SHOE MACHINERY CO., Ltd., RICKS, F., WOODCOCK, R. B., and BOOTHROYD, H., Belgrave Road, Leicester. April 26, 1933, Nos. 12118/33 and 9971/34. [Class 31 (i).] A splitting, skiving, and like machine has at least one of the feed rolls guided so that with variations of thickness of work an increase of gap between the rolls results in at least one of the rolls being moved forwardly of the knife edge. The machine shown in Fig. 1 is that disclosed in Specification 21977/03, [Class 76], with the exception of the supporting means for the upper roll 3. This roll is provided at its ends with bearing-blocks 5, having flanges 9 with inclined faces 11, 13. The faces are inclined upwardly and forwardly at approximately 27‹ to the vertical, or approximately 107‹ to the upper bevelled surface of the knife 15, when such type of knife is used. The faces 11, 13 move in an inclined guideway. A rectangular bar 19 is pressed upwardly by springs 21, and passes through a hole in the bearing-block 5. The upper face of the block is inclined to the horizontal and is pressed by the springs 21 against a corresponding inclined face on a bar 23, slidably mounted in the machine frame, and adjustable across the machine. In another construction of machine with a horizontal splitting knife 29, Fig. 3, an upper feed roll 35, acting as a gauge roll, is mounted in end bearing-blocks 37, sliding in inclined guideways 39, and urged upwardly by springs 41, which hold inclined faces on the blocks against inclined faces on a slide bar 43. The bar is adjustable across the machine by a handwheel and screw - and - nut mechanism. A pointer, actuated by the slide bar, indicates the distance of the upper roll above the knife edge. A gear on the shaft of the roll 35 is driven by a train of gears from a driving shaft so that a line connecting the axis of the gear wheel meshing with a gear wheel on the roll 35 is substantially at right-angles to the movement of adjustment of the roll. Thereby, the tendency to any movement out of mesh is minimized in the drive, the lower roll 69 is driven so as also to minimize the disengagement of gears. This roll has a roughened surface, is mounted in arms 71, and can move parallel to the upper roll, or can tip lengthwise to accommodate itself to the work. Pivot spindles 77 of the arms 71 are arranged so that as the roll is moved downwardly it moves forwardly with respect to the knife edge.
Patent GB-1145564-A (GB)
Title: A process for the production of thermoplastic copolymers
Inventor: DALIBOR HORST
IPC: C09D131/02
Filed: 1966-03-18
Abstract: 1,145,564. Preparation of thermoplastic copolymers. BECK KOLLER & CO., (ENGLAND), Ltd. 18 March, 1966 [3 July, 1965], No. 12122/66. Heading C3P. Thermoplastic copolymers are prepared by polymerizing in an organic solvent in the presence of a polymerization initiator a monomer mixture comprising (a) 10-50% by weight of a vinyl ester of the formula where R 3  and R 4  each represents H, methyl, ethyl, propyl, butyl or phenyl and n is an integer from 1 to 17 (with the provision that the viynl ester does not contain more than 91 carbon atoms), (b) 0-6% by weight of an α,#-ethylenically unsaturated mono-, di- and/or polycarboxylic acid or a partial ester of such a di- or poly-basic acid with a C 1 -C 8  alkanol, (c) 20-50% by weight of methyl methacrylate, (d) 20-50% by weight of a C 4 -C 18 -alkyl acrylate and (e) 5-20% by weight of a hydroxyalkyl or hydroxyaralkyl ester of an α,#-ethylenically unsaturated carboxylic acid. Component (b) may be acrylic, methacrylic, ethacrylic, α-phenylacrylic, maleic, fumaric, itaconic, citraconio or crotonic acid or an appropriate mono-ester of an aforementioned dicarboxylic acid. Component (e) may also be derived from an aforementioned acid. The vinyl ester (a) is preferably an ester of Versatic acid-911 (the word "Versatic" is a registered Trade Mark). Polymerization solvents specified are xylene, toluene, butanol, ketones, glycol esters and glycol ethers. Polymerization initiators specified are benzoyl peroxide, di-t-butyl peroxide, tbutyl hydroperoxide, cumene hydroperoxide and azodiisobutyronitrile. A chain transfer agent may also be present, e.g. butyl or lauryl mercaptan or thioglycolic acid. The copolymers can be used to form coatings on various substrates, particularly when in combination with a condensation resin; the coatings can be stored by heating to 100-200‹ C. (Compositions containing such copolymers in combination with aminoplast resins form the invention of Specification 1,087,623).
Patent GB-167260-A (GB)
Title: Improvements in or connected with control gear for aircraft
IPC: B64C13/00
Filed: 1920-05-03
Abstract: 167,260. Smith, W. S., and Wilkinson, G. R. May 3, 1920. Steering, balancing, and regulating altitude.- A windmill, adapted to operate the control surface, is mounted so that its plane of rotation is automatically retained in or returned to an inoperative position in the direction of motion of the machine but may be turned by the pilot when the control surfaces are to be moved. The control surfaces are connected by a cord 13 to a drum 12 which is mounted on a bracket 10 fixed to the aircraft structure, and can be rotated by the windmill 4 through bevel gearing 15, 16, and a shaft 7. When the control surfaces are to be moved, the pilot turns a drum 18 by a cable 19, and, through a sun-wheel 17, a planet-wheel 20, and an annular wheel 23, turns the standard 6 to bring the windmill into action. The rotation of the shaft 7, in addition to operating the control surfaces, rotates a pinion 27, and through .gearing 30, 25, 24, 23, 20, turns the standard 6 until the plane of rotation of the windmill is .again in the direction of motion of the machine. The control surfaces may be disconnectable from the windmill by clutches which are arranged so that the drums 12, 18 are clutched together and simultaneously detached from their respective pinions 27, 17. An auxiliary small handoperated control surface may be connected to a cable 28 on the drum 18 to indicate the force resisted by the main control surface adjacent to it.
Patent GB-712995-A (GB)
Title: Improvements in or relating to measuring equipment of the fluid-pressure type
Inventor: JEFFERSON SIDNEY
IPC: G01B13/08
Filed: 1951-05-24
Abstract: 712,995. Linear-dimension gauges. NATIONAL RESEARCH DEVELOPMENT CORPORATION. June 3, 1952 [May 24, 1951], No. 12231/51. Class 106 (2) A device for gauging the diameter of rods or pieces during a grinding or honing operating comprises a movable fluid emitting nozzle unit adapted to fo'low the rod or piece as it changes diameter and to maintain a fixed relationship therewith, and means for stopping said movement when a predetermined diameter is reached so that the diameter resulting from any further grinding or honing of the rod or piece may be gauged from the resulting change of fluid pressure in said nozzle unit. In Fig. 1, two arms 3, 4 pivoted at 5 and 6 respectively, are urged together by a spring 14. Each arm carries a nozzle 1, 2 from which a fluid under pressure impinges on a glass member 17 rotating between a diamond hone 18 and a back block 19. The pressure of the ejected fluid may be sufficient to maintain the nozzles out of contact with the workpiece 17 against the action of the spring 14. As the workpiece 17 is reduced in diameter and the arms 3 and 4 are moved together, a further nozzle 23 on one arm 4 eventually engages and is blocked by a stop 21 carried by the other arm 3. When this occurs, a pressure gauge 27 in the supply to the orifice 23 indicates a known maximum value, indicating that the orifice 23 has engaged the stop 21 and that the jaws 3 and 4 have reached the limit of their inward movement. As the honing operation on the glass member 17 proceeds the distance between the member 17 and the orifices 1 and 2 now increases, such increases being indicated by a falling reading on a pressure gauge 13 in the supply to the orifices 1 and 2. If the supply pressure is not sufficient to hold the orifices 1 and 2 spaced from the member 17, the orifices may be spaced from the member 17 by nozzle shields 40 and 41 of hardened steel as shown in Fig. 3. Specification 621,154, [Group XXIII], is referred to.
Patent GB-476724-A (GB)
Title: Improvements relating to screw fan ventilators
IPC: F04D25/12
Filed: 1937-04-29
Abstract: 476,724. Screw fans. VENT-AXIA, Ltd., and AKESTER, J. C. April 29, 1937, No. 12246. [Class 110 (i)] A screw-fan ventilator has an open-ended housing 1 with threaded spigot 2 flanged at 3 and receiving a threaded clamp ring 8, the fan unit being mounted in spider 13 detachably secured to the spigot. The spigot when inserted in a window aperture is clamped by flange 3 and ring 8, felt packing 20 being used if required. The-spider 13 is secured by studs 6 and carries an inner housing 12 with cap 22 for the motor 9. A deflector disc 17 and rings 16 are secured by bolts 7 and distance sleeves 18 to the front of the housing 1. The housings may be made of metal or synthetic resin. The fan blades may be of the form shown in Specification 429,958, [Group XXXIII].
Patent GB-1210144-A (GB)
Title: Multi-junction thermocouples
Inventor: GAY FRANK MUNRO
IPC: G01R5/22
Filed: 1968-03-13
Abstract: 1,210,144. Thermocouples. A. C. COSSOR Ltd. 10 March, 1969 [13 March, 1968], No. 12260/68. Heading H1K. A multi-junction thermocouple is made from a foil of one metal plated on one side of a dividing line with a metal of higher conductivity by removing material to leave a sinuous pattern which repeatedly crosses the dividing line. In the embodiment one half of a constantan foil is electrolytically plated with copper, and the unplated face of the foil coated with epoxy resin. A photo-resist pattern is then formed on the coated face and the metal remaining exposed etched away to leave a sinuous track 16 attached to frame 20 by thin connecting strips 18. After attaching copper bars 30 to the backing resin these strips are severed and the remaining assembly bent about line 12 on which the junction 22, 24 between the coated and uncoated parts lie until the copper bars bear on opposite sides of a mica strip. The junctions are alternately disposed to left and right to form two sets 22, 24 to each of which a heating resistor is physically attached by insulating glass frit. The assembly may then be sealed in an evacuated envelope. In an alternative construction the copper plated area is circular so that the junctions lie on a circle.
Patent GB-220598-A (GB)
Title: A combined advertising apparatus and coin freed machine for automatically deliveringsample goods and the like
IPC: G07F9/02
Filed: 1924-05-19
Abstract: 220,598. Naunton, W. Aug. 18, 1923, [Convention date]. Casings; exhibiting moving advertisements.- A combined advertising apparatus for displaying illuminated advertisements and samples of goods, and a coin-freed machine for delivering sample goods comprises upper and lower glazed cabinets 16, 15, Fig. 1, illuminated by electric lamps within each cabinet connected to a suitable source of supply. The panels 17 of the lower cabinet 15 are used for fixed advertisements painted or otherwise fixed upon the glass. Within the upper cabinet 16 is a box 30 having a number of compartments 30a for displaying samples, the box being mounted on a vertical shaft 24 which is rotated by an electric motor 19 driving through friction discs 20, 21 a vertical shaft 22 connected by a cord and pulley reduction gearing to the shaft 24. One or more coin.freed mechanisms for selling samples or other packet goods are secured to the top 25 of the lower cabinet. Delivery of articles stored in piles; storage. -Each pile of goods is carried by a platform 37 sliding between metal channels 36 and being raised by weights attached to cords 42 passing over pulleys. The cords are attached to lugs 37<a> of the platform which slide on guiding rods. The topmost articles passes through a slot in the cabinet top 25 into a slot in a delivery slide 53 which can be pulled out after the insertion of a coin, the article being then pressed out of the slot in the slide by a spring 85. Filling storage receptacles.-A section 36a of the front channel 36 of the storage receptacle is hinged at 36<b> to allow the platform 37 to be loaded. Coin action, weight, mechanical-connection, and multiple-coin. - The delivery slide is normally locked by a weighted lever 57 on the slide engaging over a fixed ledge, A coin inserted in a slot 45 tilts the lever to release the slide. The lever is slotted to allow a small coin to pass through to the money-box. The Specification, as open to inspection under Sect. 91 (3) (a), comprises also a construction, Fig. 4 (Cancelled), in which three coins are required to release the slide 53. A pivoted lever 77 on the slide is depressed out of engagement with a fixed pin 79 by a projection 76 on a rotary coin carrier when this has made one complete revolution. The carrier is turned by a knob and is normally locked by a spring-controlled pawl 72 engaging one of three notches 70. The carrier comprises two discs with filling pieces 65 providing three interconnected pockets 66 so that a small coin may drop through. The first proper coin 67 inserted projects from a pocket and raises the pawl 72 allowing the carrier to be turned through one-third of a revolution. The two succeeding coins act similarly. A fixed rod 86 coacts with a projection 84a on the lever 77 to hold this depressed and out of the path of the coin carrier projection 76 when the delivery slide is being operated. This subject-matter does not appear in the Specification as accepted.
Patent GB-969515-A (GB)
Title: Improvements in or relating to vibration-producing apparatus
Inventor: BIRKS ALAN WILLIAM
IPC: G01M7/00
Filed: 1961-04-05
Abstract: 969,515. Oscillating machines. ROLLSROYCE Ltd. April 10, 1962 [April 5, 1961], No. 12278/61. Heading H2A. Electromagnetic apparatus for producing vibrations in metal articles, e.g. gas turbine discs, for testing purposes, comprises a fixed spigot 1 on which the disc 2 is supported, an exciter unit 3 mounted to be partly below the edge of the disc 2 and a pick-up device, 4, e.g. a microphone diametrically opposite the exciter unit 3. Exciter unit 3 comprises an iron-cored coil 3, with its axis normal to the disc 2 and a U-shaped permanent magnet 6 having one pole opposite the edge of the disc 2 and the other lying at a lower level and terminating in a laminated polepiece 6a forming the core of coil 3. Coil 3 is supplied with alternating current from an oscillator (Fig. 1, not shown) and creates an oscillating magnetic field extending vertically through the disc 2; as a consequence eddy currents arise in the material of the disc which interact with the magnetic field of magnet 6 to produce alternating mechanical forces on the parts of the disc carrying the eddy currents. The frequency of vibration is the same as the frequency of the oscillations supplied from the oscillator. The diametrically opposed edge of the disc 2 will also vibrate, producing an alternating electrical output in pick-up device 4. A " slug " 13 comprising a short-circuited turn of copper strip is fitted to the upper end of permanent magnet 6, to reduce eddy currents caused by coil 5 which would tend to cause demagnetization of the permanent magnet. The oscillator supplies output to coil 5 via a power amplifier and is also connected to one set of deflection plates of a cathode-ray oscilloscope which receives on its other plates the output from pick-up 4 via an amplifier. In a modification, the oscillator is omitted, the power amplifier receiving its input from the pick-up device, so that power amplifier, exciter unit, disc and pick-up device form a positive feed-back loop in which oscillation occurs at the resonant frequency of the disc. In such an arrangement the pick-up device is preferably of the capacitive type. The exciter unit may be modified to produce different magnetic field patterns. In one modification, two permanent magnets are employed, similar poles being placed above and below the disc 2 so that their fields diverge in the disc (Fig. 3, not shown). Coil 5 may then be so placed that the mechanical forces resulting at opposite sides of each eddy current loop are in the same sense and both normal to the disc, giving greater vibration amplitude. The permanent magnet may also be so placed as to give a field through the disc parallel to its surfaces (Fig. 4, not shown), resulting in equal and opposite mechanical forces on opposite sides of each eddy current loop and thus applying a torque to the affected portion of the disc.
Patent GB-636811-A (GB)
Title: Improvements relating to combustion chambers for prime movers
IPC: F23R3/00
Filed: 1948-05-05
Abstract: 636,811. Generating combustion products under pressure. LUCAS, Ltd., J., CLARKE, J. S., and WOOD, J. May 5, 1948, No. 12336. Drawings to Specification. [Class 51 (i)] An air jacketed flame tube, for a combustion chamber of a gas turbine or jet propulsion engine, has the whole of its outer surface or at least the part which is subject to the greatest heating action roughened by knurling or like treatment.
Patent GB-302109-A (GB)
Title: Improvements in electric sign
IPC: G09F13/28
Filed: 1928-04-27
Abstract: 302,109. Long, J. E. April 27, 1928. Monogrammic signs.-An electric sign has an insulating frame a supporting a plate c with a number of semi-spherical recesses d; each recess contains a lamp e and the recess is deep enough to contain the whole of the filament, so that the parts c<1> of the plate between the recesses are not illummated. The recesses d may be painted with aluminium paint or some other reflective medium and the parts c' covered with black paint. A radial slit g is formed at each aperture f in the recesses and the sides of the slit are bent angularly to form a thread for the lamp globe. The base b carries insulated terminals i opposite the lamps and they are connected by wires to the control mechanism.
Patent GB-459764-A (GB)
Title: Improvements in and relating to grilling apparatus
IPC: A47J37/06
Filed: 1936-05-01
Abstract: 459,764. Grilling-apparatus. STUDER, H., 8, Obere Zõune, and ERNST, C., 20, Preiergasse, both in Zurich, Switzerland. May 1, 1936, No. 12440. [Class 28 (i)] A cooking-grill comprises semicircular grill bars 3, semicircular juice-receiving troughs 2, and V-shaped bars 4 which protect the troughs 2 from overheating. The troughs 2 are supported on projections 1<1> on a handled frame 1 which is arranged to slope the troughs 2 towards a juice-collecting dish 11<1>. The grill bars 3 are connected together by cross-members 31 and are removable as a unit. The spaces between the troughs 2 and the bars 4 may be packed with insulating material such as asbestos. A cover may be. placed over the grill to retain the heat. In modifications, the frame 1 is fitted with gas burners, or the bottom of the frame 1 is closed by a perforated plate whereby the device may be stood on an electric hot-plate, or an electric heating plate may be incorporated in the frame 1 beneath the perforated plate.