baber/WOPTO huggingface dataset:
Patent GB-640633-A (GB)
Title: Improvements in and relating to arc furnace control systems
IPC: H05B7/152
Filed: 1944-03-24
Abstract: 640,633. Automatic control systems for arc furnaces. BRITISH THOMSON-HOUSTON CO., Ltd. March 24, 1944, No. 5476. Convention date, March 27, 1943. [Class 38 (iv)] [Also in Group XXXVII] The feed motor 13 for an electrode 10 of an alternating current arc furnace 12 is controlled to maintain a constant arc current by a generator 18, preferably an armature reaction machine of the kind described in Specification 539,835, having a control winding 25 excited by a voltage which varies in magnitude and sign as the difference between two voltages proportional, respectively, to the electrode current and arc voltage. The control voltage is obtained by combining in resistors 44, 31 the rectified output voltages of current and pressure transformers 26, 27, the control voltage being fed to winding 25 over normally closed contacts 34, 37, 32, 38 of control switches 56, 33 and limit switches 40, 41. A resistor 36, normally shorted by a contactor 45 when the arc strikes, is provided for slow speed lowering of the electrode when starting up the furnace. Adjustment of the voltagecurrent characteristics of the arc is effected by variation of resistor 31 and by ganged switches 78, 80 controlling, respectively, tappings on the main transformer 77 and the amount of resistance 79 included in the output circuit of transformer 27. The generator has an anti-hunting winding 48, opposing the winding 25 and in series with a resistor 49, the latter being, in part, shorted out during lowering of the electrode to increase the opposing effect and so reduce the lowering speed. Manual control of the electrode motor is effected by depressing the knob 58 of switch 33 to disconnect winding 25 from the automatic control and connect one of its ends (or the end of a separate winding) to a tapping 65 on a potentiometer 59 across an auxiliary source 60, 61. Rotation of the knob then connects the other end of the winding to point 64 or 68 of the potentiometer by closure of switch contacts 62, 63, or 66, 67, so that the electrode is raised or lowered. A rectifier 47 shunting the lower limit switch 41 permits the electrode to be raised even if that switch is open. Each electrode is provided with similar control equipment, whilst a common master controller 35, similar to switch 33, provides for full automatic control when its knob 52 is pulled out and for common manual control when the knob is pushed in and rotated. Specification 292,272, [Class 38 (iii)], also is referred to.
Patent GB-1059250-A (GB)
Title: Articulated joints for dolls or the like
IPC: A63H3/46
Filed: 1965-12-30
Abstract: 1,059,250. Dolls. H. HEERLEIN. Dec. 30, 1965 [Dec. 31, 1964; Dec. 17, 1965], No. 55300/ 65. Heading A6S. An articulated joint on a doll comprises 3 more than hemispherical head part fitting into a more than hemispherical recess part, one part being made of an elastic material.
Patent GB-566331-A (GB)
Title: Improvements in transmission gearing for trolley buses
IPC: B60K17/22
Filed: 1943-04-07
Abstract: 566,331. Motor vehicle axle gearing. KIRKSTALL FORGE, Ltd., and COWELL, F. R. April 7, 1943, No. 5547. [Classes 79 (ii) and 79 (iv)] In a trolleybus, in order to avoid a large reduction gear at the centre of the axle and to give sufficient ground clearance and a low floor level, a bevel or worm drive 18, 19 is provided between the propeller shaft 16 and the differential gear 20, and a hub reduction gear in each wheel hub 29. The hub gear is preferably of the kind described in Specification 517,465, in which a pinion 25 on the axle shaft 21 drives an annular gear 28 on the wheel hub through idler gears 26 carried by a stationary carrier 27. The wheel 22 and brake drum 31 are secured to the wheel hub by bolts 30. The differential gear is nearer one end of the axle than the other. In order to give maximum ground clearance and a low floor level, the basin 10 of the axle casing is tilted so that its flange 12 is inclined to the vertical as shown in Fig. 2.
Patent GB-476005-A (GB)
Title: Improvements in and relating to air rifles
IPC: F41B11/72
Filed: 1937-02-24
Abstract: 476,005. Air-rifles. PRICE, N. H., and SCHOETTLIN, A. B. B. Feb. 24, 1937, No. 5582. [Class 119] An air - rifle comprises a stock 1, a barrel 4, a breech - block 2 pivoted at 5 on the stock, an air chamber 6 in the breech-block with an outlet passage 10, 9 controlled by a valve 12, a shot magazine 29 adapted to supply a shot to the mouth 11 of the outlet of the breech bolt when this is swung down, means for charging the chamber 6 with compressed air and moving the breech-block down and up again to receive a shot from the magazine and bring the shot into line with the barrel, and a trigger 25 adapted to open the valve to fire the shot. The air is compressed by means of a piston 17 in a cylinder 14 in the breech-block connected by a passage 16 to the chamber 6. The piston-rod 18 is connected to a lever 19 pivoted at its front end at 20 and forming at its rear end a trigger guard. The outward swing of the lever causes a shot to pass from the magazine 29 to the mouth 11 of the breech-block, and the return of the lever causes the compression of the air. To fire the shot, a safety catch 24 pivoted on the trigger 25 is rocked out of engagement with a fixed stop 23, then the trigger is pulled to release a flap 26 to allow the valve 12 to be opened by the compressed air. The valve is closed again near the end of the outward swing of the lever 19 by a finger 28 which is rocked on butting against the front end of a slot 28a in the stock.
Patent GB-179697-A (GB)
Title: Improvements in or relating to means or appliances for securing sash cords to the sliding sashes of windows
IPC: E05D13/00
Filed: 1921-02-19
Abstract: 179,697. Newsum, G. Feb. 19, 1921. No Patent granted (Sealing fee not paid). Sash-cord attachments.-Sash cords are detachably secured to sashes by two metal trough-shaped parts adapted to be secured together, one of which is attached to the cord and the second screwed to the sash. The part e is countersunk in the sash and secured by screws in the flange j and main part. The cord is clamped bv a screwed plate t to the second part f, and this is secured to the part e by a screw q passing through one or more lugs h and a, projection p on the part f.
Patent GB-470353-A (GB)
Title: Improvements in or relating to brake operating mechanism for pedal cycles
IPC: B62L5/00
Filed: 1936-02-26
Abstract: 470,353. Cycle brakes. PARKES, J., and SUN CYCLE & FITTINGS CO., Ltd. Feb. 26, 1936, No. 5725. [Class 136 (i)] In brake-operating mechanism for pedal cycles, of the type comprising a foot-actuated lever and a transmission rod, the lever comprises a bifurcated arm which straddles the transmission rod adjacent to a thrust-collar on the rod, against which collar the bifurcated arm abuts to effect the operating movement of the rod and the brake shoes connected thereto. As applied to a tandem bicycle, a bell-crank lever a is pivoted to a bracket b on a clip c secured to one of the chain stays d between the front and rear crank brackets. One of the arms a<1> of the lever is provided with a pedal a<3> to be engaged by the heel of the front rider, and the other, inwardly-bent, arm a<2> is forked to straddle the transmission rod f of the usual hand-operated mechanism of the rear brake, and engages the conical head of a thrust-collar f<1>, which is adjustable along the rod f and is locked in position by a grub-screw g<2>. In a modification, the bracket h is welded, brazed, &c. directly to the chain stay d.
Patent GB-805655-A (GB)
Title: Coal tar pitch compositions
Inventor: WOOD LESLIE JAMES
IPC: C08L95/00
Filed: 1956-02-24
Abstract: A fluxed pitch, obtained by blending with a fluxing oil in which either one or both is treated at elevated temperatures to remove fume-generating volatiles, also contains an organic thermoplastic resin, a natural or synthetic rubber, or a coal extract.  The resin, rubber, or coal may be present during or after the elevated temperature treatment.  Specified resins are polyvinyl chloride, or acetate, polystyrene, and polymethyl methacrylate.  Undissolved coal matter, when a coal extract is used, can remain and acts as a filler.
Patent GB-686062-A (GB)
Title: Improvements in or relating to devices comprising a hollow guide to be supplied by a generator for ultra-high frequency oscillations
IPC: H01P1/22
Filed: 1951-03-09
Abstract: 686,062. Wave-guides. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 9, 1951 [March 14, 1950], No. 5773/51. Class 40 (viii). A wave-guide 3, supplied by a generator 1, is coupled at a number of points along its length to a second wave-guide 4 from one end of which energy is abstracted by a consumer device 2. The coupling may consist of two series of longitudinal and transverse slots 14, 7 so disposed that energy travelling towards the consuming device 2 is amplified and that travelling away from it is neutralized. Disposed in one of the wave-guides is a longitudinally adjustable regulating member 8 which is constructed to absorb, without reflection, energy proceeding in either direction and consists of two plates 11, 12 of resistance material, e.g. carbon, staggered by a distance of #/4, and each longer than the distance between the transverse slots. Energy arriving at the ends of the guides is absorbed by wedge-shaped pieces of carbon 9, 10. Variation of mutual conductance with the position of the regulator 8 may be reduced by increasing the distance between the apertures 7, 14 at the end of its path or making their length smaller.
Patent GB-846476-A (GB)
Title: Improvements in control circuits for magnetic recorders
Inventor: BEAUFOY RAYMOND
IPC: G11B5/02
Filed: 1957-02-20
Abstract: 846,476. Electric digital-data-storage apparatus. BRITISH TELECOMMUNICATIONS RESEARCH Ltd. Feb. 7, 1958 [Feb. 20, 1957], No. 5777/57. Class 106 (1). A writing circuit for magnetically recording information in binary form and having recordings of one or other kind produced in respones to the momentary connection of potential to the appropriate one of two control leads under the influence of regularly spaced strobe pulses is characterized in that two sources of strobe pulses are employed giving pulses of the same repetition frequency but 180 degrees out of phase, the strobe pulses combining with the potentials on the control leads to effect the selective operation of two toggle circuits controlling the supply of current to the writing head. As described, a positive signal applied to a terminal B, Fig. 1, causes two normally " off " (left-hand output O 2  positive) transistor toggle circuits MA and MB to go " on " in the order A, B thereby producing a write current WC, Fig. 4, in the secondary winding of a transformer TR, to write a 1, and a positive signal applied to a terminal A causes the toggles to go " on " in the order B, A, thereby writing a 0. A positive signal at terminal B is sampled by a strobe pulse TS at a gate A causing toggle MA to go " on " thereby raising its right-hand output 0 1 , which, in turn, opens two gates D and F so that when a strobe pulse TS2 next occurs toggle MA is turned " off " and toggle MB is turned " on." Toggle MB in the absence of a signal on terminal A is then turned " off " by the next strobe pulse TS1 which passes via a gate G this gate being opened by inverter IN2. When " on " each toggle causes current to flow in its half of the centre-tapped primary of the transformer TR thereby producing the required current in the secondary. An overriding control terminal C is provided so that the two toggles can energize one of a plurality of heads, the particular head energized being selected by lowering the potential of the associated terminal C. Details of the toggles and inverters are given (Figs. 2 and 3, not shown).
Patent GB-1138152-A (GB)
Title: Photographic projection apparatus
IPC: G03B21/53
Filed: 1966-02-10
Abstract: 1,138,152. Automatic position control. EASTMAN KODAK CO. Feb. 10, 1966 [Feb. 15, 19651, No.5813/66. Heading G3R. [Also in Division G1] In a photographic projector, a stream of fluid is directed from a compressor on to the transparency and pressure variations dependent on . variations of the position of the latter are utilized to control restoration of the transparency to a position of focus automatically. Fig. 1 shows a slide projector in which light from a source 10 passes through a condenser lens 12, a slide 25 and a projection lens 26. Air from a blower 11 passes through a transparent tube 22 to a space, between the slide and a fixed transparent convex surface 20, the pressure in which is transmitted through a tube 27 to a pressure gauge 30. When the pressure in the space corresponds to that at which ' the slide is at the focus of lens 26, a vane 31 carried by the pointer of the pressure gauge shields two solid state photo-conductive rectifiers, such as 33, from light derived from the projection beam by a partial reflector 15. Deviation of the slide in one sense or the other from this position causes the pressure gauge to expose one or the other of the rectifiers so that a D. C. motor 28 is run from an A. C. source in the appropriate direction to correct the slide position by moving a slide carrier 18 backwards or forwards. A switch 34 opens to disable the motor circuit when a slide is removed. In a modification, the air is supplied through a transparent tube directed towards the centre of the slide, pressure variations due to slide movement being detected within the tube and transmitted to a bellows which operates a reversing switch controlling the supply to the motor from a D. C. source. In this arrangement the tube moves away from the slide when the latter is removed and also operates the motor cut-out switch. There are references to the application of the invention to photo-enlargers and cine projectors.
Patent GB-1246603-A (GB)
Title: Interfacing circuit
Inventor: SHELLEY DAVID JOHN
IPC: H03K19/018
Filed: 1970-02-06
Abstract: 1,246,603. Semi-conductor switching circuit. STANDARD TELEPHONES & CABLES Ltd. 6 Feb., 1970, No. 5823/70. Heading H3T. An inverting amplifier T 1  drives an inverting integrated circuit device such as a gate G whose output is connected both to an integrated circuit system (not shown) and also to a feedback circuit R 2 , D 1  which shunts input current when the input is below the threshold voltage of the whole circuit. If the input rises, however slowly, from a low value, the output being consequently low, the diode D 1  conducts to shunt the input until the threshold of amplifier T 1  is reached. As T 1  conducts the output of G goes high and D 1  is blocked, allowing the output to rise uninhibited. As the input subsequently falls, and reaches T 1  threshold, the output starts to fall and conduction of D 1  enables reciprocal coupling to complete the switching. The circuit will respond therefore to slowly, rising signals, and is said to be insensitive to noise. A capacitor (C 1 , Fig. 5, not shown) across the input and T 1  emitter further improves transient rejection, and may have a Zener diode across it. The emitter resistor R 5 , and its diode D 3  may be omitted, and T 1  may be replaced by a pair of transistors (T 1 , T 2 , Fig. 4, not shown).
Patent GB-768188-A (GB)
Title: Improvements relating to electric batteries
IPC: H01M6/38
Filed: 1955-02-28
Abstract: 768,188. Diaphragm apparatus for discharging receptacles. SOC. EREC SOC. D'ETUDES, DE REALISATIONS ET D'EXPLOITATIONS COMMERCIALES. Feb. 28, 1955 [March 3, 1954], No. 5915/55. Class 102(2) [Also in Group XXXVI] The inert cells 4 of a battery are activated by the displacement of the electrolyte contained in the pockets 6 located above the cells. Each cell is provided with a pocket 6 having a passageway 5 communicating at its bottom with the cell. The pockets have a yieldable sealing element 7 blocking the passageway 5, and a cover member 8 of extensible non-conducting material. When the spring loaded member 9 is released, the member 8 is forced downwardly as in Fig. 2 causing the element 7 to yield and thus allow the electrolyte to flow into the cells. The extensible member 8 may consist of a single sheet covering all the pockets 6 or separate sheets, one for each pocket.
Patent GB-1494133-A (GB)
Title: Centring of lenses
IPC: G02B7/00
Filed: 1975-02-12
Abstract: 1494133 Grinding lenses PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 12 Feb 1975 [15 Feb 1974] 5940/75 Heading B3D [Also in Division G2] A lens is centred before grinding by being held between the opposed cups of a centring apparatus while a fluid under pressure (e.g. air) is admitted via bores to each cup to reduce sliding friction and so obtain more exact centring.
Patent GB-749930-A (GB)
Title: Improvements in or relating to transducers
IPC: B06B1/06
Filed: 1954-03-01
Abstract: 749,930. Sound transmitting and receiving devices. BENDIX AVIATION CORPORATION. March 1, 1954 [March 31, 1953], No. 5964/54. Class 40 (4). In a transducer primarily intended for underwater use, an array of radially - responsive annular transducing elements having their outer surfaces acoustically decoupled from each other are located in a recess in a sound transmitting member forming the front wall of a container, the depth of the recess being equal to the thickness of the transducing elements. As shown in Figs. 1 to 3, the array of annular, radially - responsive trans-. ducing elements 10 are located in an enclosure between a solid vibrationreflecting wall 20 and a recessed soundtransmitting member 14, the outer surface of each element being acoustically insulated by a ring 44 of sound absorptive material while the elements are positioned in individual pockets which are formed in the recessed member by integral bosses 17. The elements may be formed from an annular ceramic dielectric which comprises barium titanate and utilizes inner and outer electrodes consisting of fused silver films, the electrodes being connected in parallel to a screened lead 30 by bus-bars 35-38 arranged in slots 40 in the member 14. An outer member 22 of hard rubber is secured to the member 14 by screws 27 which engage peripherally-embedded metal reinforcement 25, 26, a waterproofing compound being interposed. A layer of soundabsorptive material 23 is located between the member 22 and the wall 20, this layer and the rings 44 being formed of soft air cell rubber or corprene. The sound-transmitting member 14 is formed of rubber composition which has an acoustic impedance matching the medium, e.g. water, in which the transducer is to operate. A matching choke 43 located in a cavity 48 is connected in series with the elements and the free space within the transducer is filled with a sound propagating medium such as castor oil through a closable aperture 46. Alternatively only the pockets in the member 14 are filled before assembly, the oil being then restricted to this region by suitable sealing. Specifications 583,639 and 601,477, [both in Group V], are referred to.
Patent GB-575835-A (GB)
Title: Improvements relating to starting arrangements for electric discharge lamps
IPC: H05B41/08
Filed: 1944-04-01
Abstract: 575,835. Control systems for space discharge apparatus. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., and ALDINGTON, J. N. April 1, 1944, No. 6095. [Class 38 (iv)] A starting switch for discharge lamps having filamentary electrodes, adapted to lock in after ineffectual starting, comprises a bimetal member X and a co-operating member Y with which the first may make contact to complete the starting circuit in two positions, in the second of which contact is maintained to prevent further starting attempts. As shown in Fig. 1, a lagged heating element Z in a loop of the member Y bends the latter to separate contacts A, B after a time sufficient to heat the electrodes E ; if the lamp L does not start, subsequent cooling recloses the circuit at A, B. A succession of fruitless operations accumulates sufficient heat (the switch being enclosed, preferably in a container filled with low-pressure gas) to bring contacts B, C into engagement and permanently close the starting circuit. The member Y may be of bimetal to compensate ambient temperature changes. In a modification, in which the contacts are normally separated, a glow discharge between the members is arranged to cause the member X to bend to the right faster than a bimetal member Y to close the starting circuit at A, B. Each starting attempt accumulates heat in a heater adjacent to the member Y, whereby contact is eventually made at B, C. In a further modification operating in a similar manner, the engagement of contacts A, B is induced by a heating element in shunt to the gap A, B.
Patent GB-432054-A (GB)
Title: Improvements in apparatus for colour photography
IPC: G03B33/00
Filed: 1934-02-24
Abstract: 432,054. Colour photography. NEUMANN, H. T., 201, West 54th Street, New York, U.S.A. Feb. 24, 1934, No. 6120. Convention date, March 2, 1933. [Classes 98 (i) and 98 (ii)] An accessory for adapting an ordinary camera to take colour photographs comprises a frame attachable to the rear end of the camera, two dark slides mounted on the frame at right angles to each other, and a combined light filter and reflector member mounted on the frame and movable to an angular position between the dark slides. As shown in Figs. 1 and 2, to the rear end of the camera casing 12 is removably attachable a frame 20 with a top wall 21, a bottom wall 22 and side walls having projections 35 with surfaces 37 at an angle of 45 to the bottom wall 22, to which surfaces are adjustably screwed plates 40. The top wall 21 terminates short of the rear edges of the side walls in a flange 46. The side walls have inwardly projecting shoulders with grooves 43 and have vertical wall portions which are in the same plane as the flange 46 and from which extend wall portions having tongues 52. Extending from the walls 50 are horizontal bars 55 pivoted to which is a frame 57 swingable into contact with the plates 40 and holding a combined light filter and reflector 58 adjustable thereon by screws 72. Slidable in grooves 43 are bars 78 of which one carries a ball-catch and which have slots 79 co-operating with links 83 pivoted to the sides of the frame 57. The dark slide 28 has grooves coacting with the bars 78, one groove having a recess coacting with the catch so that insertion of the dark slide 28 into the accessory swings forward the frame 57. The bottom of the dark slide 28 has a shoulder 95 to contact the rear edge 96 of the bottom wall 22. The member 90 has a recess 100 carrying bow springs 102 and has a slot 108 for a shutter slide 110. The dark slide 26 has grooves receiving the tongues 52, and has also a groove 124 receiving a tongue 112 of the member 90, so that one dark slide locks the other in place. The dark slide 26 has slots 131 receiving a slide 133 pressing spring arms 136 carrying bow springs 137 against the superimposed plates 69, 70. A shutter slide 143 is provided in grooves 140 in the dark slide 26. Pivoted on the frame 57 is an opaque plate 154 preventing light passing directly from the bellows to the plate 68.
Patent GB-1493082-A (GB)
Title: Pallet
IPC: B65D19/00
Filed: 1975-02-14
Abstract: 1493082 Load handling pallets SEMI-BULK SYSTEMS Inc 14 Feb 1975 [15 Feb 1974] 6259/75 Heading B8H A load handling pallet for use as the bottom of a container for particulate or powdered material comprises a double skinned load supporting deck downwardly inclined towards a discharge aperture 12 in a peripheral wall 14. The upper skin 11 of the deck has reinforcing ribs 11a and is designed to flex under load to abut the lower skin 15 which has depending bearers 16, 17 and is reinforced by ribs 19 which extend at right angles to the ribs in the upper skin. An air permeable diaphragm (not shown) is secured across the upper skin of the deck to form a plenum chamber therewith into which pressurized air may be introduced, through a hole (13) Fig. 4 (not shown), to fluidize the powder above the diaphragm.