baber/WOPTO huggingface dataset:
Patent GB-1508773-A (GB)
Title: Dc control circuits
IPC: G05F1/46
Filed: 1974-04-19
Abstract: 1508773 D.C. motor control JOSEPH LUCAS Ltd 9 April 1975 [19 April 1974] 17186/74 Heading H2J In a D.C. control circuit having switching means 14 in series with a load, 12, 12a current sensing means 13 producing a monitoring waveform signal representing the current flow in the load, and control means 16 for turning the switching means off when the load current reaches a first level and turning the switching means on when the load current falls to a second lower level, means 9 are provided for limiting the rate of change of the monitoring waveform signal to a level in excess of the normal maximum rate of change of load current. As shown in Fig. 1, the load is a D.C. motor and the switching means is a thyristor connected across a battery 11, and the current sensing means is a Hall-plate device. The rate limiter 9 may take any of the forms shown in Figs. 4, 5 and 6. In Fig. 4, the terminal 28 is connected to the device 13 and the terminal 29 to the control device 16. If the signal from device 13 changes abruptly due to a transient, diodes 26 and 33 became reverse-biased and capacitor 34 is then charged via resistor 25 at a limited rate. Fig. 5 is an operational amplifier equivalent of Fig. 4, the amplifier 35 being connected as a voltage-follower. Fig. 6 shows a modification of Fig. 5, the resistor 25 being replaced by a parallel network consisting of resistors 41, 43 and diodes 42, 44. The junction of 41 and 42 is connected to a transistor 45 which is turned on only when the thyristor 14 is turned off, and the junction of 43 and 44 is connected to a transistor 46 which is turned on only when the thyristor is turned on. This ensures a fast return of the monitored waveform signal to that of the actual load current even if the load current is increasing and a negative transient is received or vice versa. When signals from the load current monitoring means require to be amplified, the limiter may be incorporated into the amplifier.
Patent GB-1292195-A (GB)
Title: A process and apparatus for making a cellular product
IPC: B29C67/20
Filed: 1970-04-10
Abstract: 1292195 Laminates COMPAGNIE DE SAINT - GOBAIN - PONT - A - MOUSSON 10 April 1970 [25 April 1969] 17204/70 Heading B5N [Also in Division C3] A laminate comprises a sheet of fabric or fibres covering a cellular product which comprises a mass of expanded granules of a foamed thermoplastic resin and a thermosetting resin which fills the interstices between the granules thus constituting a continuous hardened network throughout the mass. The sheet may be impregnated, e.g. with bitumen. Fig. 2 shows sheets of glass fabric, 7 and 7a, expanded polystyrene granules, 12, and phenol resin, 13, as the hardened continuous network.
Patent GB-724361-A (GB)
Title: Improvements in or relating to warning signs particularly for road use
Inventor: WESTBROOKE WILLIAM GEORGE FRED
IPC: B60Q7/00
Filed: 1953-06-23
Abstract: 724,361. Road traffic signs. FAIRYLITES, Ltd. June 23, 1953, No. 17402/53. Addition to 677,055. Class 3(2). The warning sign described in the parent Specification is modified in that the sign carrying member 1 is engaged with the box 2 for storage in pencil-box lid fashion. The box 2 is made without a wall at one end and its side walls have internal grooves 5 near their free edges in which are engaged the side edges of the member 1. Portions 6 are pressed in from the bottom of the box and these are frictionally engaged by a flange 7 on the end of the member 1, to support it in an erect operative position. The flange 7 also serves as a closure for the open end of the box in the storage position of the member 1; it is arranged in this position, to project slightly below the box bottom for ease of withdrawing the member 1. To keep the member 1 in the storage position a snap action fastener is provided. This consists of a projection having an aperture 8 at the end of the box and a local projection 9 on the member 1 for engaging the hole 8. The member 1 consists of a plate 3 to which reflectors 4 are attached by means of casings 4a which are first welded to the plate 3 and then have their free edges bent over the reflectors.
Patent GB-259301-A (GB)
Title: Improvements in and relating to electric transformers
IPC: H01F27/30
Filed: 1925-07-07
Abstract: 259,301. British Thomson-Houston Co., Ltd., and Holbrook, H. S. July 7. 1925. Addition to 241,843. Transformers.-A spacer for transformer coils comprising a member 1 of substantially rectangular cross section adapted to extend between two adjacent coils and having transverse ducts 7 communicating with all four faces as described in the parent case, is so designed as to have unbroken edges to afford a better support for the coils. The spacer is built up of strips of insulating material formed with openings as shown in Fig. 2, and the several sections are secured together after assembly by a flattened rod passed through the slots 5.
Patent GB-897155-A (GB)
Title: Strings for musical instruments and processes for making the same
IPC: G10D3/10
Filed: 1959-05-22
Abstract: 897,155. Strings coated with finely-divided material. BAYER, W. May 22, 1959 [July 23, 1958], No. 17570/59. Class 93 [Also in Groups XXV and XXXVIII] A musical instrument string comprises a single or compound metallic or non-metallic core on which is built up an air-resistant coating of metallic or non-metallic material in powder or flake form with the aid of a binding medium which will adhere both to the core and the coating. The material may consist wholly or partly of ferromagnetic material, and may be a metal or metal alloy, a metal oxide, an ore, or graphite. The binder, which may be natural or synthetic resin or a chemically modified natural product, may be used in solution, as an emulsion, in melted form, or as a monomer which may be polymerized during the treatment. The core may be drawn through a solution of the binder, or the solution may be sprayed or painted on to the core. The powder may be dusted on, or the coated core drawn through the agitated powder, and excess powder may be removed by blowing, wiping or shaking. The binder may be set by treatment with hot air, heat radiations or a chemical hardener, or by mere storage at room temperature. The working sequence is repeated, e.g. in a continuous operation, until the desired coating thickness has been built up. The last coatings may be with binder only. The string may be braided with bright iron wire prior to coating. The powder may be a magnetic steel, a silicon-containing iron alloy, "Ferrum Reductum", magnetite, or a ferrite, either of the "ferroxdure" or "ferroxcube" types. With high retentivity materials, the string may be magnetized normally to the direction of the core. Such a magnetized string may be located in an induction coil having a soft iron or ferrite core to produce directly an alternating voltage output. The core may be of synthetic material, e.g. of a polyamide. In Example 1, a steel wire of 0.25 mm. diameter is drawn through an acetone solution of cellulose acetate, through zinc dust, excess being removed by a blower, and through a drying tube, the wire being wound on to a bobbin. The wire is again drawn through the solution and dried to form a guitar 2nd string. In Example 2, a steel wire of 0.28 mm. diameter is drawn through an aqueous dispersion of polyvinyl acetate, slightly dried, drawn through fine iron powder, excess being removed by vibration, dried, and wound on to a bobbin. The process is repeated three times, and the wire is finally drawn through the aqueous dispersion and dried to form a guitar 3rd string. In Example 3, a galvanized steel wire is drawn through an  aqueous dispersion of polyvinyl acetate, slightly dried, and drawn through powdered barium sulphate, excess being blown off after drying. The coating is twice repeated without the powder treatment and dried to produce a guitar 2nd string.
Patent GB-229621-A (GB)
IPC: A47J41/02
Filed: 1924-07-23
Abstract: 229,621. Siegheim, F. Feb. 20, 1924, [Convention date]. Addition to 228,848. Fitted with drinking- cups.-The double-walled glass drinking-cup b described in the parent Specification is inverted over the neck of the vacuumjacketed vessel a instead of of being placed directly on the mouth of the vessel, and is removably secured to the body of the vessel as by means of pips m, l, on the cup and vessel engaging bayonet slots in a loose ring o. The cup and the base of the vessel are protected by caps c, e.
Patent GB-800775-A (GB)
Title: Improvements in or relating to temperature sensing devices
Inventor: WEBER VICTOR
IPC: H05B1/02
Filed: 1955-06-21
Abstract: 800,775. Temperature-responsive actuating - elements. ROBERTSHAW - FULTON CONTROLS CO. June 21, 1955 [Sept. 8, 1954], No. 17620/57. Divided out of 800,773 [Group XI]. Class 64(2) A temperature-responsive element includes a pair of walls 36, 38 connected together at their peripheries 40 to define an enclosed chamber 42 for fluid, at least one of the walls being provided with a depressed portion 44 secured to the other of the walls for preventing deflection of the walls upon variation of pressure within the chamber. In the preferred embodiment, six radially-disposed portions 44 are provided in each of the walls, the contacting portions being united by soldering or spot welding. Alternatively, the depressed portions may take the form of concentric circles provided with breaks for maintaining communication between all parts of the chamber 42. The element is mounted in the heater 14 of a gas or electric cooker as described in Specification 800,773 and is connected to a switch or other control device by a capillary tube 64 having a helically-coiled portion to permit the element to move.
Patent GB-1120820-A (GB)
Title: Elevator systems
IPC: B66B1/18
Filed: 1966-04-22
Abstract: 1,120,820. Lift control systems. WESTINGHOUSE ELECTRIC CORP. 22 April, 1966 [30 April, 1965], No. 17638/66. Heading B8L. A multi-car lift control system of the type described in Specification 949,761 serves a number of floors above the first, which are divided into separate "up" and "down" zones, each comprising one floor or a plurality of adjacent floors. If a plurality of cars at different locations are available to respond to a zone demand, that car is selected which is in the best position to answer the call. According to the present arrangement, if a more advantageously located second car becomes available while the first chosen car is moving to answer a call through an express zone, the assignment is transferred to the second car. Each car has cam-operated switches one of which is closed when the car is near the upper end of an express zone, and another is closed while the car is in the express zone. If all the cars are at the first floor and a " down " call is registered for the floor located immediately above the express zone, a first car is assigned to that floor to move upwardly. The first car loses its assignment when it enters the express zone, the starting of additional cars from the first floor being prevented. Since the first car is now the highest available car, it is selected in preference to the other cars to serve the "down" demand. A car travelling up from the lower terminal floor may be parked in a selected zone provided that the car has no assignment for "down" calls and there is no "up" floor-calls ahead. If a car becomes available above the express zone while a car which has been assigned to answer a "down" demand is in transit through the express zone, the demand will be re-assigned to the upper car. Scanning for an available car starts from the highest zone down, so preventing the selection of an available car at the first floor if a more convenient car is available above the express zone. A number of cars may be sent from the first floor to park above the express zone dependent upon the available number at the first floor, the number above the express zone, and the traffic demand above the express zone.
Patent GB-1379334-A (GB)
Title: Wiper assembly for a motor driven vehicle
IPC: B60S1/60
Filed: 1973-04-12
Abstract: 1379334 Cleaning vehicle head-lamp lenses NISSAN MOTOR CO Ltd 12 April 1973 [19 April 1972] 17642/73 Heading A4F Wiper apparatus for cleaning a circular convex surface 32, such as that of a vehicle head-lamp or spot-light lens or of a vehicle side mirror, comprises a resilient wiper blade 44 carried by a holder 42 at the end of a wiper arm 40 mounted on a shaft 34 adjacent to and outside the surface 32 and rotatably oscillated by drive mechanism to move the blade 42 to and fro between extreme positions in which it engages and is caused to conform with the inner periphery of an annular member 46 concentric with the surface 32 and of an inner diameter greater than the diameter of the surface 32. The holder 42 is connected by a hinge 42a to the arm 40 and is spring-biased towards the surface 32. During operation the wiper blade 44 has a limited pivoting movement relatively to the arm 40, being connected thereto by a pivot pin 44c and a pin and slot connection 44d, 42b. The drive mechanism is operated by an electric motor associated with a parking switch for ensuring that the wiper blade 44 is parked in contact with the annular member 46. Reference has been directed by the Comptroller to Specification 1334145.
Patent GB-418244-A (GB)
Title: Improvements in or relating to a combined spring-clip contact and terminal for electrical apparatus
IPC: H01R13/11
Filed: 1933-06-21
Abstract: 418,244. Plug couplings. LUNDBERG & SONS, Ltd., A. P., and PEGG, G., 477, Liverpool Road, Holloway, London. June 21, 1933, No. 17677. [Class 38 (i).] A socket-member of an electric coupling is formed from a spring-metal blank, Fig. 1, comprising parts 18, 20 adapted to form with the apertured centre 16 a pocket for a terminal block 11, and split extensions. 22, 24 which are bent to form spring socket-elements 26, 26a, the ends 30 of which are flared and may also be slotted. The block 11 is formed with a spigot 15 which projects through the aperture 16 and is riveted over. A modified blank, Fig. 4, is provided with an apertured centre portion 33 to cover the left-hand face of the block 11 and two apertured extensions 39, 40, both engaging with the spigot 15.
Patent GB-1530514-A (GB)
Title: Circuit arrangement for generating a frequency signal proportional to the product of a voltage and a frequency signal
IPC: H03K3/72
Filed: 1976-04-30
Abstract: 1530514 Electric analogue calculating MMG AUTOMATIKA MUVEK 30 April 1976 [9 May 1975] 17697/76 Heading G4G A circuit for forming a signal of frequency representing the product of two quantities represented by a frequency and a voltage respectively, comprises an input amplifier 1 receiving the frequency signal, a Schmitt trigger 5 converting the A.C. input into a train of rectangular pulses, a bistable multivibrator 8 converting the pulses into pulses at half the input frequency and with 1 : 1 duty cycle, these being applied to one input of an AND or NAND gate 10. The voltage input U s  is applied to the non-inverting input of a differential amplifier 20 while the inverting input receives the output of the gate 10 after stabilization at 15 and integration by resistor 17 and capacitor 18. The output of amplifier 20 is used to switch the input 28 of a bistable circuit 27 between high and low levels depending on the polarity of the difference between the amplifier inputs. The bistable circuit is triggered by the output of multivibrator 8 and the output 29 is connected to the other input of gate 10. It is shown that the circuit effectively limits the passage of pulses through the gate 10 to the number of pulses whose time integral is equal to U s , and the number of pulses counted at 12 will then give the desired frequency output signal. In Fig. 10 (not shown), the multivibrator 8 is not used and a transistor performs the function of gate 10 to provide a more versatile circuit using the same principle as in Fig. 1. The circuit can be used in a mass flow meter in which the frequency signal represents velocity and the voltage signal represents density.
Patent GB-389804-A (GB)
Title: Improvements in or relating to vehicles
IPC: B62D11/10
Filed: 1931-06-18
Abstract: 389,804. Driving and steering endlesstrack vehicles. MARTINAGE, L., 46, Rue de Courcelles, Paris. June 18, 1931, No. 17739. Convention date, Oct. 13, 1930. Void [Published under Sect. 91 of the Acts]. Drawings to Specification. [Class 79 (ii).] An endless-track vehicle is driven by the engine through two change-speed gears, one for each track, the vehicle being steered by separately controlling the change-speed gears so as to drive the tracks at different speeds.
Patent GB-457504-A (GB)
Title: Improvements in and relating to fire detecting apparatus
IPC: G08B17/10
Filed: 1935-06-20
Abstract: 457,504. Smoke detectors. STEPHENS, A. J., 285, High Holborn, London.-(Walther & Cie Akt.-Ges. ; Dellbruck, Cologne, Germany) June 20, 1935, No. 17744. [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 23, 1935.] [Class 47 (i)] Relates to smoke-detecting installations in which a plurality of smoke pipes are connected to a common suction pipe, a switch device being provided for connecting the individual smoke pipes in succession to one chamber of a photo- or thermo-electric signalling device comprising two test chambers normally balanced; and consists in connecting the common suction pipe to the second, comparison, chamber. The smoke pipes A are connected in succession by the switch B to the pipe C leading to the detecting chamber D<1>. The common suction pipe F is connected to the comparison chamber D<2>. Thus, smoke occurring either in an individual pipe A, or in the common pipe F due to a rush of smoke from a sudden and extensive fire, will cause the two detectors D<1>, D<2> to become unbalanced, and a signal will be given.
Patent GB-1099148-A (GB)
Title: Oil mist detection method and apparatus
IPC: G01N21/27
Filed: 1966-04-22
Abstract: 1,099,148. Photo-electric oil mist detectors. STEWART-WARNER CORPORATION. April 22, 1966 [April 22, 1965], No. 17756/66. Heading G1A. Apparatus for detecting a variation in the particle density of an air stream carrying particles comprises a casing having an inlet and an outlet for the stream, a lamp and a light receiving device situated between the inlet and the outlet along the longitudinal axis of the stream path, the device providing a signal proportional to the light intensity received by the device. Light from a filament lamp 28, Fig. 2, backed by curved reflector 39 is projected downstream along the axis of an oil mist-carrying duct 10. Light penetrating the mist enters a cylindrical light-guide 40 by a plane face 42 and is reflected by a silvered inclined face 43 along the axis of the guide 40 to a double photo-resistor 60. The two sections 80, 82, Fig. 3, of the photoresistor are connected to unijunction transistor oscillators U1, U2 to prevent the same oscillating when the oil mist density is below or above a preset level respectively. So long as oscillators U1 and U2 oscillate, the pulses they produce repeatedly fire A. C. energized SCR1 and SCR2 to keep the relays 88 and 90 energized, but when one stops oscillating, the corresponding relay drops to energize a corresponding alarm A1, A2. The apparatus is calibrated by changing over switch SW1, thus connecting a calibrated resistor R13 to the photo-resistor 80. The light-source intensity is then adjusted with the desired density of oil mist flowing until the oscillator U1 just fails to oscillate. Oil mist is allowed to condense on and drip off the elements of the apparatus in the stream for sufficiently long for a steady state to be reached before calibration.
Patent GB-530146-A (GB)
Title: Improvements relating to windows
IPC: E06B3/40
Filed: 1939-06-19
Abstract: 530,146. Windows. SLEIGH, H. L., and CHESTON, A. S. June 19, 1939, No. 17792. [Class 20 (iii)] The frames 1 of a pair of windows 2 for vehicles or other purposes are formed with front flanges 5 fitted in the channels of a rubber &c. strip 10 on the face of the fixed pillar &c. 6. The frames 1 may be formed of metal or non- metallic plastic material constructed as described in Specification 527.200, and the panes 2 may be mounted in glazing panels 3 of the kind described in Specification 442,552.
Patent GB-1389784-A (GB)
Title: Mould assembly and method for continuous or semi-continuous casting
IPC: B22D11/14
Filed: 1973-04-13
Abstract: 1389784 Continuous casting BRITISH ALUMINIUM CO Ltd 13 April 1973 17838/73 Heading B3F Metal such as Al, Mg, or Al- or Mg-base alloy, flows from a body 17 of the molten metal in an insulating container 15 (with a cover 16) through a number of apertures in a plate 14 of low thermal conductivity material (which may be integral with the container 15) into a mould 11 of which the inner surface for contacting the molten metal is of graphite and which is cooled by water, e.g. in a jacket 13, applied to its outer surface so that the cooled part of the surface extends downstream from a transverse plane no more than one inch downstream of the aperture plate 14. The metal is "level poured", i.e. directed to the container 15 from a furnace tap hole as a stream 18 through a launder without change of level. The use of such apparatus and method is said to reduce coarse dendrites and improve quality and be more convenient for simultaneous multiple casting. In another embodiment, the upright portion of the cover of the insulating container (26) is integral with the mould and has a separate cover-plate (27). The mould is of Al (Cu is also mentioned) and has a graphite liner (22) instead of being wholly of graphite. Water is applied to the mould outer surface at the level of the downstream surface of the aperture plate (25). The distance between this level and the outlet of the mould is not more than 2À5 inches, preferably less than 1À5 inch. The mould graphite may be soft and porous; lubricant may pass into the mould through the pores or channels instead of being applied to the inside surface directly. The graphite mould may be sprayed with copper on the outside to prevent water penetration. It may be machined from solid. As a liner, the graphite may be a shrink-fit or press-fit in the metal shell. The apertures in plate 14 are from 3/16 inch to 1 inch diameter and occupy 30-60% the effective plate area.
Patent GB-931695-A (GB)
Title: A container provided with a cap
IPC: B29C65/02
Filed: 1960-05-20
Abstract: 931,695. Plastics containers. INREDECO Inc. May 20, 1960 [May 22, 1959], No. 17890/60. Class 66. A container, e.g. a bottle 1, formed of a synthetic plastics material, has a neck which is closed by a cap member 3, flanges formed on the bottle and cap being heat-sealed by welding, the cap having a knob 6 severable at 7 to form a pouring spout 5. The welding may be effected by electrodes 8 clamped on the bottle neck and an annular electrode 9 lowered over the cap member 3. A heat impulse process, or resistance-heated welding elements may also be used. In a modification, Fig. 2 (not shown), a flange on the cap member projects inside the bottle neck.
Patent GB-1268513-A (GB)
Title: Structural unit for a floor frame skeleton of a building
Inventor: IWENS JEAN
IPC: E04B5/14
Filed: 1969-04-08
Abstract: 1,268,513. Floor skeleton. J. IWENS and A. DE POERCK. 8 April, 1969 [10 April, 1968], No. 17907/69. Heading E1K. A floor skeleton comprises a rectangular unit formed of superimposed layers of beams 2, 3 framed by bearing girders 6, 5, the beams 2, 3 of each layer being parallel to respective girders 6, 5. Upper and lower beams are formed by channel members joined back to back by tubes 10 which extend through both layers. The ends of upper beams 2 bear on I- section girders 5, those of beams 3 being received in holes in I-section girders 6. The girders are connected to corner columns 8. Trusses (15) are provided between the channel members of the beams.