baber/WOPTO huggingface dataset:
Patent GB-1493721-A (GB)
Title: Current mirror
IPC: H03F3/34
Filed: 1975-03-21
Abstract: 1493721 Transistor amplifiers RCA CORPORATION 21 March 1975 [11 April 1974] 11893/75 Heading H3T In a current mirror amplifier the feedback connection between the collector and base of the input transistor 24 is provided by cascaded complementary common-emitter transistors 31, 32. This avoids inaccuracies that occur in conventional current mirror amplifiers when 24 and 27 are low gain laterally formed transistors because the base current can be an appreciable fraction of the collector current. A capacitor or reversed biased diode 34 may be added to avoid high frequency instability. As described the current mirror amplifier is used as an active load for a differential amplifier 10 to provide a single ended output to a load 17 through an optional Darlington pair 171, 172. Negative feedback 175 may be provided to one or both inputs of amplifier 10. Resistors 25, 26 and 173 may be omitted and 33 replaced by a forward biased diode. Transistors 24, 27 may be formed as a double collector transistor. Various current gains and a plurality of outputs may be provided in conventional manner, Figs. 3, 4, 5 (not shown).
Patent GB-1510253-A (GB)
Title: Method of producing high molecular film containing ionized material
IPC: B41M5/20
Filed: 1976-03-25
Abstract: 1510253 Producing images by ionic distribution KUREHA KAGAKU KOGYO KK 25 March 1976 [26 March 1975] 11989/76 Heading B6C Images are formed in high molecular weight films by selectively injecting ionic substances into, removing ionic substances from, or shifting the ionic substances within, the film under the action of heat below the melting-point of the film and electric field, at least one of which is applied in a pattern, the resulting uneven ionic distribution producing a visible or latent image. The films may be of halogenated polyolefin, polyester, synthetic rubber, acrylic resin, methacrylic resin, polystyrene or polyvinylidene fluoride. The ionizable substance is preferably a dye, e.g. Malachite Green, Rhodamine B or Methyl Violet. The resulting pattern may be in the form of a persistent latent image, using the non-uniform resistivites in a charging and subsequent development process. Where ions are injected into the film, the external source may be a coating of the ionizable substance, a solution or another film containing that substance. Where two films are sandwiched together the process of injection or removal results in complementary positive and negative images. Apparatus may employ shaped electrodes or shields in front of a radiant heat source.
Patent GB-544407-A (GB)
Title: An improved method of assembling a magnet-system for a moving-coil acoustic device
IPC: H04R9/02
Filed: 1940-07-22
Abstract: 544,407. Making magnets. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken.). July 22, 1940, No. 12031. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 27, 1941.] [Classes 83 (ii) and 83 (iv)] Soldering.-A magnet system for a moving coil loud-speaker of the kind which is kept together by a bush connected both to the pole plate and to the central pole is provided during assembly of the parts with a layer of solder between the bush and pole plate and also between the bush and central pole, the parts being subsequently brought to final position and heated to effect soldering. The copper or brass bush 6 is provided with a solder wire or foil such as tin solder or Woods metal and slipped over the central pole 2 which has a yoke plate 1 clenched thereon. The central pole together with the shell 3, the annular pole plate 4 and bush are assembled on a templet 5. The bush engages the central pole at 8 and the flange 7 engages the pole plate 4 through an interposed layer of soldering material such as tin foil or Woods metal. A sheet iron diaphragm spider 11 and a non-magnetic ring 13 for the terminal board with intervening layers of solder first may also be arranged on the templet. The parts are pressed on the templet by a spring 17 and heated to melt the solder either in a furnace or inductively by a high frequency alternating current passing through a coil 18. The magnet is magnetized after soldering has been effected.
Patent GB-791038-A (GB)
Title: Improvements in or relating to apparatus for illuminating documents or the like
IPC: G03B27/54
Filed: 1955-04-26
Abstract: 791,038. Photographic exposure particularly for phatomechanical printing records. CHEVALIER, R. J., and GARREAU, J. T. April 26, 1955 [April 26, 1954], No. 12058/55. -Class 98(1) [Also in Group XXXV] Printing illumination for flat or transparent originals is effected by a gas discharge tube or tubes, the current therefor being supplied from a number of condensers whose charge is varied by use of a supply of variable voltage to vary the intensity of the flash. Such variation replaces the normal variation of times of exposure in accordance with factors such as opacity of original, degree of absorption of filters, scale of enlargement and sensitivity of emulsion, since the flash exposures -are of constant duration; and the method avoids lack of register due to deformation of the original by heat or vibration of the apparatus during longer exposure when effected as by arc lamps. Figs. 1-8 of which only Fig. 4 is shown illustrate a variety of shapes and sizes of discharge tubes to suit different originals, usually mounted in lanterns or reflectors and having adjacent fluorescent tubes for illumination during focusing; in Fig. 4 frame 9 forming a reflector having an opening 10 contains discharge tube 8 and a similar frame 12 contains fluorescent tube 11, the two frames being connected together at 14 for sliding in a larger frame 13 which may carry the original to be reproduced or may be located behind a transparent support carrying such original, and in use either frame 12 for focusing or frame 9 for printing is slid into the optical axis position O as shown. For description of the illuminating apparatus and wiring diagram therefor (see Group XXXV).
Patent GB-872666-A (GB)
Title: Improvements in or relating to heat exchangers
IPC: F28F13/06
Filed: 1959-04-10
Abstract: 872,666. Tubular heat exchange elements BONO-CORAGGIOSO, C, April 10, 1959 [April 19, 1958], No. 12251/59. Class 64(3) -A heat exchanger tube 1 has a core mounted therein such as to leave an annular channel between the core and the tube wall, the core comprising an elongated member 4 on which is helically wound a drawn metal wire, rod or strip 7 which may be welded to the member 4. The core may be of truncated conical shape or may be made in sections. In a core comprising interconnected sections the diameter of the sections may increase progressively in the direction of fluid flow through the tube. Supports 6 may extend from the core to position it concentrically within the tube.
Patent GB-539995-A (GB)
Title: Improvements in and relating to weaving machinery
IPC: D06H3/12
Filed: 1940-07-30
Abstract: 539,995. Photo-electric control of alignment of textile material. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). July 30, 1940, No. 12333. Addition to 499,753. [Class 40 (iii)] [Also in Groups XXXV and VIII] The means for detecting a skewed condition of the weft members of a strip of woven material according to the parent Specification includes motor driven straightening means M, 14, 2, 3 operated from a generator G driven in accordance with the speed of the strip and the excitation of which is varied in strength and polarity according to the amount and direction of the skew. The two narrow light beams which are used to obtain from photo-electric cells 30, 31 impulses the frequency of which accords with the rate of passage of weft threads are laterally spaced on the strip and oppositely inclined to a perpendicular to the warp elements so that at one side the beam will more nearly correspond with the direction of the weft when skewed and the sensitivity of the control will be increased thereby. The effect of variations in amplitude in the individual impulses is eliminated by following the impulse amplifiers 42, 44 with saturated space discharge devices 46 having a low plate voltage and a resistor in the grid circuit. To prevent simultaneous flow of current to a condenser 51 or 56 receiving an impulse and a condenser 40 to which this impulse is transferred the discharge devices 47, 48 concerned in each case are biased to cut off by a capacitor and leak resistance in their input circuits. The condenser 40 which accumulates a charge of polarity and amount depending on the direction and extent of skew is connected through resistances in parallel with a condenser 58 which, through a resistance capacity network having an anticipatory effect on the control, determines the relative grid potentials of a double triode 61 in series with the primary windings of two transformers. The secondaries of these transformers feed rectified current into a resistance network whereby the normal 90 degree phase-displaced grid voltages of triodes 80, 81 in series with the opposed windings 83, 84 of the generator G are compounded with oppositely directed D.C. voltages varying in accordance with the skew conditions. Apparatus as in the parent Specification may be added to correct bowed weft.
Patent GB-474754-A (GB)
Title: Electric condensers
IPC: H01G4/38
Filed: 1936-05-05
Abstract: 474,754. Condensers. STANDARD TELEPHONES & CABLES, Ltd., and SCAIFE, F. N. May 5, 1936, No. 12687. [Class 37] A network of condensers is constructed by spraying metal coatings or, the two sides of a sheet of ceramic material of the titanium oxide group. In the example coatings 4, 5 on one side of a sheet 3, coact with separate coatings 6, 7, 8, 9, 10 in order to obtain in small space, the desired couplings.
Patent GB-827444-A (GB)
Title: Vehicle for transporting and storing liquids
IPC: B60P3/22
Filed: 1958-04-22
Abstract: 827,444. Tank vehicles. GOODYEAR TIRE & RUBBER CO. April 22, 1958 [May 29, 1957], No. 12703/58. Class 108(1) A resilient container 10 is secured to flanges 13 carried by an internal axle 14 provided with an inlet valve at one end and a discharge valve 62 at the other end. The discharge pipe 24 which connects with the valve 62 is prevented from collapsing by a spring 26 and is pressed radially outwardly by the leaf spring 27. When used as a trailer the flanges 13 are connected by bolts 33 to flanges 34 carried by stub axles 35 which are mounted in bearing housings 37 forming part of the towing frame 38, 39, 42.
Patent GB-1476879-A (GB)
Title: Slide-casting machine
IPC: B28B1/08
Filed: 1975-03-26
Abstract: 1476879 Slide-casting machine PARAISTEN KALKKI OY-PARGAS KALK AB 26 March 1975 [29 March 1974] 12737/75 Heading B5A In a slide casting machine for concrete moving on wheels over a horizontal bed, the concrete is fed on to the bed by at least two horizontally extending feed screws, there being a horizontally extending mandrel or partition arranged between the or each pair of screws, and vibrators mounted within the or each mandrel or partition and also vibrators external to the cast concrete. The mandrels or partitions have a greater extent than the screws. Between the screws (as shown at A-A in Fig. 4) each mandrel or partition 18e follows the shape of the screws 3f, 3d to define a trough having a base slot 14 through which concrete drops on to a base-plate. Beyond the ends of the screws (as at C-C) each mandrel or partition 6c is of circular, square or other cross-section (see Fig. 6, which shows partitions 7g, 7h defining I-section beams), and surrounds a vibrator 22. The intermediate cross-section 5d is shown at B-B. The axes of the screws are higher than those of the mandrels or partitions. The machine carries curved side plates 21 adjacent the screws, which receive concrete that drops from a hopper (1) (Fig. 1, not shown). The upper surface of the concrete is vibrated by a horizontal plate (11).
Patent GB-185468-A (GB)
Title: Carburettor for internal combustion engines
IPC: F02M7/12
Filed: 1921-05-05
Abstract: 185,468. Cahill, D. May 5, 1921. Spray carburettors.-The carburettor has separate cylindrical passages for air and for a mixture of air and liquid fuel respectively which are controlled by a single throttle in such a manner that the effective cross-sectional areas of the admission ports bear a constant relation to each other at all positions of the throttle. Means are provided for supplying additional mixture when the throttle is fully open, and for increasing the depression in the passage for air and liquid fuel when the throttle is nearly closed, a check valve also being fitted to prevent waste of fuel when the throttle is suddenly moved into its closed position at high engine speeds. Fig. 1 shows an horizontal section through a hollow cylindrical throttle valve fitting into an enlarged chamber formed in the inlet passage of the car. burettor, and Fig. 3 is a vertical section of the throttle showing ports Q, R of equal area which coincide with the main passage when the throttle is fully open. A cylindrical passage E opens eccentrically into the chamber and is controlled by a port T in the end of the throttle, the ports T, Q, R subtending the same angle at the centre of the throttle so that the three ports are always opened to the same proportionate extent. Liquid fuel from a float chamber F is supplied to the passage E through a passage G and a vertical passage H containing a removable jet just below the level of the passage G. When the throttle is fully open a port X in the throttle registers with a passage W supplied with fuel through a jet in a vertical passage U. The upper ends of the passages U, H are closed by plugs. As the throttle approaches its closed position an elongated port S registers with a port J communicating with the passage E through the channel I to increase the depression therein, the port J being controlled also by a valve K which closes the port when the depression becomes excessive, the valve being held open by an adjustable spring M and the back being open to the atmosphere. The unbalanced lateral pressures in the throttle tend to keep it pressed on to its seat. According to one Provisional Specification the augmented depression at light loads may be obtained by setting the port T slightly out of phase so as to remain slightly open when the throttle is fully closed.
Patent GB-592153-A (GB)
Title: Improvements in chicken brooders
IPC: A01K31/18
Filed: 1945-05-23
Abstract: 592,153. Chicken brooders. VISICHICK BROODER CO., Ltd., MUDD, J., STOUT, E. C., and TINDALL, A. May 23, 1945, No. 12845. [Class 5 (ii)] [Also in Group XXV] In a chicken brooder, a stay 5 for the hinged cover A<SP>1</SP> is freely pivoted on a bracket C beneath the cover. A trough-shaped bracket D on the brooder frame A engages the lower end of the stay when the cover is open and guides it into a horizontal position when the cover is closed.
Patent GB-253879-A (GB)
Title: Improved manufacture of alloys
IPC: C22C1/02
Filed: 1926-05-21
Abstract: 253,879. International Nickel Co., (Assignees of Mudge, W. A.). June 16, 1925, Alloys. - Aluminium-copper-nickel alloys are made by adding an aluminium alloy containing preferably not more than 85 per cent of aluminium to a molten alloy containing copper and nickel. For example, for the production of an alloy containing up to 17 per cent of aluminium, 1-90 per cent of copper, and the remainder nickel, an alloy containing 60-70 per cent of aluminium, 20-25 per cent of nickel, and 10-15 per cent of copper, is added to a molten coppernickel alloy. The addition is preferably made in the furnace, and the furnace is preferably lined with zirkite brick. A small amount of magnesium may be added to the preliminary aluminium 'alloy, and the alloy may also contain calcium, zinc, tungsten, and other deoxidizing elements.
Patent GB-1068448-A (GB)
Title: Improvements in or relating to thrust bearings
IPC: F16C17/04
Filed: 1966-03-24
Abstract: 1,068,448. Bearings. PHILIPS' GLOEILAMPENFABRIEKEN N.V. March 24, 1966 [March 27, 1965], No. 13052/66. Heading F2A. A hydrodynamic fluid thrust bearing has two patterns of grooves and means for conducting lubricant to the grooves of each pattern. The grooves of the two patterns are arranged so that, upon rotation of a rotatable thrust member in one direction, lubricant is drawn into the grooves of one pattern to generate a pressure therein and, upon rotation of the rotatable thrust member in the opposite direction, lubricant is drawn into the grooves of the other pattern to generate a pressure therein. The centreline of each groove may have the form of a logarithmic spiral, the direction of the spiral in one pattern of grooves may be opposite to the direction of the spiral in the other pattern of grooves and an annular channel may be provided between the two patterns of grooves for conducting lubricant to the inner pattern of grooves. In an embodiment, upon rotation of a thrust member (2) in one direction, lubricant is supplied to grooves (5), Figs. 1 and 2 (not shown), via passages (7) and an annular channel (6) whereas, upon rotation of the thrust member (2) in the opposite direction, lubricant is supplied to grooves (4) by means not shown. In other embodiments, a spherical-shaped rotary thrust member (2), Fig. 4 (not shown), has two annular series of grooves (4 and 5); a frusto-conical shaped rotary thrust member is provided; the grooves (4), Fig. 8 (not shown), are straight; and the grooves (4 and 5), Fig. 7 (not shown), are arranged in herring-bone patterns.
Patent GB-567589-A (GB)
Title: Supporting means for stretching machines for metal strips
IPC: B21D25/00
Filed: 1943-08-13
Abstract: 567,589. Stretching. LOEWY ENGINEERING CO., Ltd., and WUTSCHER, T. Aug. 13, 1943, No. 13112. [Class 83 (iv)] A machine for stretching, and thereby straightening, strip has a gripper head 2 movable along a bed by a chain drive 4 for unwinding the strip S from a reel 9, the strip then being pulled by a gripper head 1, actuated by a hydraulically-operated ram, whilst the head 2 remains stationary. The chain drive 4 may consist of a chain at each side of the bed and transverse bars 10 are secured between the parts of the chains which follow the head 2 so as to travel at the same speed as the strip S and support it without causing scratching or other damage, or if one chain only is used, the bars 10 project on each side of it. The bars 10 may be replaced by rollers loosely journalled on the connecting pins of the chains or by one or more conveyer bands and may be covered with soft material such as felt. The strip S is supported adjacent the head 1 by an apron 11 and the chains 4 are driven by a sprocket 5 rotated from an electric motor through reduction gearing. The supports 10 may also be used on a draw bench operating on shorter strips.
Patent GB-338480-A (GB)
Title: Improvements relating to electron discharge tubes or thermionic valves
IPC: H01J5/50
Filed: 1930-04-30
Abstract: 338,480. Naamlooze Vennootschap Philips' Gloeilampenfabriek.en. Jan. 4, 1930, [Convention date]. Vacuum tubes.-The envelope of a thermionic valve or other discharge device is formed with a re-entrant part 3 enclosing a body 4, preferably of moulded insulating material, carrying one or more contacts 6, which mav thus lie partly or entirely within the re-entrant part. The body 4 may be of conductive material from which the contacts are insulated. The holder 7 consists of insulating material with sockets 8 moulded in a central boss 9 extending into the re-entrant part. Tn a modification, the end surface of the body 4 lies in, or projects slightly beyond, the plane of the bulb, and one or more of the contacts consist of parts of a press-stud.
Patent GB-133634-A (GB)
Abstract: 133,634. Guindon, J. S. N. May 16,1919. Foot cycles.-Relates to roller skates of the kind propelled by foot pressure acting through gearing upon the road wheels. The foot of the wearer is strapped to a frame 41 which slides vertically on rods 5, 25 fixed to the main frame 4 which carries the road wheels 7, 12. On the down-stroke, ratchet-devices 45 engage chains 43 which drive the road wheels 7, 12 through the gears 36 and ratchet-and-pawl mechanism on the spindles 8, 11. The upstroke is assisted by springs 51 and by coiled springs on the shafts 30. To permit of steering, the front fork 6 is pivoted and fitted with a semi-circular grooved plate 15 round which passes a wire 18 connected at its ends to bell-crank levers 19 carrying wheels 23. When the skate is inclined laterally, one of the wheels 23 touches the ground and tightens the wire 18, thus turning the wheel 7 to that side. By bringing the skates together, levers 55 are caused to press against each other and operate band brakes which check the speed.
Patent GB-401669-A (GB)
Title: Improvements in or relating to motion picture film magazines and films
IPC: G03B17/26
Filed: 1932-05-09
Abstract: 401,669. Kinematograph apparatus. INTERNATIONAL PROJECTOR CORPORATION, 92, Gold Street, New York, U.S.A.-(Assignees of Kindelmann, A. and Pearlman, J.; 92, Gold Street, New York, U.S.A.) May 9, 1932, No. 13368. Convention date, Jan 5. [Classes 97 (i) and 98 (ii).] A film magazine for a kinematograph camera contains a film bearing footage indicia, and has one or more apertures through which the indicia may be observed without unloading the magazine. The aperture may be so placed as to necessitate removal of the magazine from the camera for the observation, or to permit observation without removal ; it may, alternatively, be an opening already provided in the magazine for another purpose, e.g., for operation of a feed claw. The Figure shows a construction in which an observation aperture 16 separate from the feed claw opening 14 is provided for reading marginal indicia between the film perforations. Alternatively the aperture 16 may be omitted, readings being then made through the opening 14. The observation aperture may be at the top or back of the magazine.
Patent GB-1529073-A (GB)
Title: Fasteners
IPC: F16B19/00
Filed: 1976-04-02
Abstract: 1529073 Stud fastener KATO HATSUJYO CO Ltd 2 April 1976 [9 Dec 1975] 13382/76 Heading E2B The socket for a stud fastening comprises an outer wall 1 and an inner wall 2 defining together an annular space 4. Hollow space 7 communicates with aperture 3 in the portion 8 connecting the walls. The outside of wall 1 is tapered at 6 to facilitate insertion of the stud into a wall &c and the inner face of wall 2 is sloped for ease of insertion of the stud.  Stud 9 may be provided with teeth 12 to assist in positive location. The socket is formed in one piece from resilient material and may, optionally be square in form.
Patent GB-713591-A (GB)
Title: Improvements in and relating to electrical signalling devices
IPC: G08G1/097
Filed: 1952-05-28
Abstract: 713,591. Electromagnetic vibrator instruments; indicating excess load in A.C. circuits. GENERAL ELECTRIC CO., Ltd., BARSDORF, L. W., and POLGREEN, G. R. May 28, 1952, No. 13579/52. Class 37. The invention relates to A.C. excess-load electromagnetic vibrators as disclosed in Specification 712,005 and consists in designing the vibrator so that the natural frequency of the reed or other vibratory element coincides with a selected abnormal A.C. supply frequency e.g. 48 c/s. If, for example, the device is set to give an audible warning when the circuit load exceeds nine kilowatts at the standard or normal frequency of 5o c/s. and the vibrator is designed so that mechanical resonance occurs at 48 c/s. then should the mains frequency fall to 48 c/s. the audible warning will occur at a lower circuit loading, for example, six kilowatts.