baber/WOPTO huggingface dataset:
Patent GB-607683-A (GB)
Title: Improvements in or relating to apparatus for detecting flaws in electrically conducting materials
IPC: G01N27/90
Filed: 1944-11-17
Abstract: 607,683. Determining physical qualities of materials. GENERAL ELECTRIC CO., Ltd., TOMLIN, G. M., GOSS, J. A., and WINCHCOMBE, G. S. Nov. 17, 1944, No. 22817. [Class 37] Flaws in conducting materials are detected and indicated by the changes in frequency of an oscillatory circuit, the frequency of which is dependent on the flow of current in a sample under test. As shown, the sample S under test is passed through the coil L1 forming with condenser C1 the tuned grid circuit of a valve oscillator V1 having its anode circuit tuned by L2, C2. With a standard sample in coil L1, the two oscillatory circuits L1, C1, L2, C2, together with the tuned anode circuit L3, C3 of the amplifier stage V2, are adjusted to the same frequency causing the output of V2 which is rectified at V3 to apply a high negative potential to the grid of V4 which is thus biassed beyond cut-off. Flaws in a sample passing through L1 reduce the oscillator frequency, the corresponding reduction of signal output from V2 permitting V4 to pass current and operate a relay T to light an indicator lamp A and, if desired, mark the sample at the defective position. The relay T and lamp A may be replaced by a meter indicating the magnitude of the signal voltage and hence the depth of the flaw. The sample S is screened electrostatically from the coil L1 at E to isolate capacity effects and thus obviate errors due to slight deformations in the sample. In a modification, the output from oscillator V1 may be heterodyned with that of a crystal controlled oscillator, cracks or other flaws varying the beat frequency (which may be zero for a standard sample), which may be measured in known manner.
Patent GB-641258-A (GB)
Title: Improvements in apparatus for casting concrete walls, pipes and the like
IPC: E04G11/22
Filed: 1947-08-18
Abstract: 641,258. Moulding concrete walls, pipes, and sewers. ELSMORE, F. R. Aug. 18, 1947, No. 22836. [Class 87 (ii)] [Also in Group X] Concrete walls, pipes or sewers are cast in situ or prefabricated by means of mould forms e, Figs. 1, <SP>2</SP> provided with vertical racks d which engage spur wheels b keyed to horizontallyarranged shafts a connected by bevel spur wheels c, the rotation of the shafts a being reversed at short intervals so that the forms e rise and fall a few inches during the moulding process and thus prevent adhesion of the concrete to the forms. As shown in Figs. 1, 2, the four walls of a building or building unit are cast together in one operation, the roof being cast separately and hoisted into position. When the concrete is set, the complete mould is lifted vertically from the cast walls.
Patent GB-1467148-A (GB)
Title: Fluid operated vehicle body level control system
IPC: B60G17/015
Filed: 1974-05-22
Abstract: 1467148 Controlling vehicle suspension height; preventing body roll NISSAN MOTOR CO Ltd 22 May 1974 [29 May 1973] 22840/74 Heading B7D In a vehicle suspension system including hydropneumatic suspension units 24 which each incorporate a levelling valve 40 connected by supply and return lines 20, 22 to a fluid pressure source 10 comprising a pump 12, pressure control valve 14 and an accumulator 16 and to a reservoir 18 respectively, normally open solenoid valves 48, 50 block the lines 20, 22 to inhibit levelling operations when a sensor 42 detects that the vehicle body is tilted by an excessive amount. This prevents the time lag of the levelling valves creating dangerous situations due to incorrect levelling during alternating turns in opposite directions. The sensor 42 in a pendulum switch having a movable contact in the form of a pendulum 52 which can swing between stops 56 to cooperate with a fixed contact 54. The pendulum 52 may be disposed to respond to either roll or pitch of the vehicle body and when a predetermined value is reached a delay circuit 44 which filters out unwanted transient effects to a control unit 46 which energizes the solenoid valves 48, 50. In a modification the two solenoid valves are combined in a single assembly.
Patent GB-992994-A (GB)
Title: Improvements in and relating to gas fires having glass windows
Inventor: WATTS HERBERT
IPC: F24C15/02
Filed: 1963-06-07
Abstract: 992,994. Sealing strips for stove doors or windows. RADIATION Ltd. March 10, 1964 [June 7, 1963], No. 22867/63. Heading F4W. A seal for the glass window of a gas fire comprises a strip of resilient heat resistant material held between the window and the body of the fire by an S-section beading engaging an edge in the body of the fire and the strip. A door 5 having a window formed of glass rods 4 is hinged to the front of a radiant gas fire, and the door 5 is sealed to the door frame by a heatresistant sealing strip c secured to an edge on the frame by an S-section beading 10, Fig. 3. The seal c comprises an asbestos tube 8 with a glass fibre filling 9. One re-entrant of the beading 10 retains the tube 8, while the other re-entrant engages the edge of the frame.
Patent GB-1352752-A (GB)
Title: Photocopying machine
IPC: G03G15/30
Filed: 1971-04-19
Abstract: 1352752 Electro-photography CANON K K 19 April 1971 [11 March 1970 15 April 1970] 22946/71 Heading G2H A copier comprises housing 12 on which an original holder 11 Fig. 5 (not shown) reciprocates, upwardly removable photo-conductive drum 1 Fig. 6 (not shown), upwardly removable unit comprising a corona device 4 and a corona-exposure device 5, sideways removable unit comprising lamps, reflectors and shields Fig. 7 (not shown), image-projecting black box 43, sideways removable magnetic developer device 7, removable corona device 8, transfer device 9, drum-cleaning device 10 and laterally removable heat-fixing device 300. The drum comprises a photo-conductive layer sandwiched between an insulative surface layer and an insulative or conductive substrate. If the charging wires (400), Figs. 38-40 (not shown) of the corona devices are disconnected, a tension pin (415) makes contact with a grounding plate (416). The developer device Figs. 8 and 12 (not shown) comprises two doctor-bladed magnetic brushes and two mixing screws separated by a partition having an adjustable opening (113). A separate toner supply hopper (108), Figs. 9 and 10 (not shown), which is hinged for supply of toner or removal of developer device, has a feed screw (132) operated manually or automatically and may have a mixing device (152), Figs. 13 and 14 (not shown). The discharge opening of the hopper is closed by a spring-loaded cover (115), Fig. 19 (not shown) when disconnected from the developer device. The drum-cleaning device comprises cleaning rollers (506 and 507), roller-contacting brushes (513 and 522), and brush-contacting beating members (516 and 523), the rollers being of resilient material wrapped around with cleaning material and being separated by a partition to form a lower chamber having a toner-removal screw (515) and upper chamber having a toner-removal suction port (524). The gap between the lower wall of the lower chamber and the drum may be sealed by a roller (518), Fig. 27 (not shown) or sheet (552), Fig. 29 (not shown). The copy sheet feed mechanism Fig.20 (not shown) comprises a roller (59 2 ) and guide (86) mounted on a pivotally openable side plate (94). The fixing device Figs. 24-26 (not shown) comprises upper and lower pivoted members, each bounded by rotating chains (307 and 311). The lower member has a transport chain belt (312) and the upper member has an air chamber with a suction fan at one end. A microswitch or photo-cell copy sheet sensing device actuates the developer device and on sheet jamming produces a warning, de-energizes the fixing means or effects complete shut down.
Patent GB-168884-A (GB)
Title: An improved electric maximum automatic cut-out
IPC: H01H71/24
Filed: 1921-08-30
Abstract: 168,884. Koolhaas, D. J. B. Aug. 30, 1920, [Convention date]. Electromagnetic and magnetic switches contacts.-An electro magnetic overloac switch or cut-out com prises a magnetic circuit including two cores a, b joined by a bar c. One limb a carries a low-resistance series coil e, the other b carrying a high-re sistance shunt winding f. At the other end o the cores is mounted a block of insulating material recessed tc hold two mercury con tacts j, k, which are adapted to be con nected together by a floating armature d with limbs d<1>, d<2> dipping into the mercury when the armature is in its unattracted position. Contact blocks h, g, i carry connections by which the coil e is connected in series with the line, the main current passing through the armature d and mercury contacts j, k, and the shunt coil f being connected directly across the incoming and outgoing leads of the cut-out. With normal circuit conditions the armature d remains unattracted, but if the line current exceeds a predetermined maximum the coil c will be sufficiently energized to attract the armature d, thereby breaking its circuit. With the armature in its attracted position a closed magnetic circuit is established, and if the overload condition persist, the shunt coil will be sufficiently energized to maintain the armature d in its displaced position. Release of the armature d may only be effected either by momentarily breaking the external circuit or increasing the resistance of the external circuit sufficiently to decrease the energization of the coil f below the minimum at which it will maintain the armature d in its attracted position.
Patent GB-351295-A (GB)
Title: Process for the production of metallic magnesium from its compounds
IPC: C22B26/22
Filed: 1930-07-30
Abstract: <PICT:0351295/III/1> An electrostatic separator for use in condensing magnesium vapour at 650-1200 DEG  C. from an electric arc furnace 1 comprises a rod cathode 9 and an annular lining 10 forming an anode, on which the magnesium particles collect to flow as liquid into a receiver 5. Gas passes on to a washer or a further electrostatic separator, and is treated with steam to oxidize the carbon monoxide which is removed as carbon dioxide, hydrogen remaining being dried and circulated through the furnace.
Patent GB-298746-A (GB)
Title: Improvements in or relating to doffing mechanism for spinning, twisting and like machines
IPC: D01H9/16
Filed: 1927-09-02
Abstract: 298,746. Wademan, J., Wademan, W., and Wademan, W. Sept. 2, 1927. Doffing - arrangements; spindle apparatus; threadholding arrangements.-To ensure the proper " halching " of the yarn during the doffing operations in spinning, twisting, and like machines and to enable the doffing-apparatus described in Specification 183,869 to be used with any kind of spool or bobbin whether positively or frictionally driven, a device 3 serving as a bobbin support and " halching " member is used, and comprises an upper flange 5 for supporting and driving the bobbin and a lower recessed flange 6 provided with a projection 13 to engage projections 12 on the boss of the wharl and with depending teeth or projections 8, 9, Fig. 3, to engage and sever the yarn. The device 3 with a full bobbin is transferred to a dead spindle, and the yarn extending therefrom is trapped between the wharl on the spinning spindle and the device .carrying the empty bobbin and is broken by the teeth 8, 9 upon re-starting. A recess 14 is formed below the upper flange for the engagement of a holder 16 to support the bobbin and the device 3 during the transferring operation. The Provisional Specification describes the device as being provided with teeth or serrations on its periphery, and the wharl of the spinning spindle and the upper portion of the full bobbin peg as being of rectangular formation the sides of which are engaged by pins or pegs of the device when it is dropped thereon.
Patent GB-733969-A (GB)
Title: Improvements relating to the control of brake-actuating electric motors
Inventor: SPIESS GUSTAV
IPC: B66B1/28
Filed: 1953-08-21
Abstract: 733,969. Control of A.C. motors. INVENTIO AKT.-GES. Aug. 21, 1953, No. 23091/53. Class 38 (3). Relates to a system for levelling a lift which is driven by a slip-ring induction motor, the brake for the lift being actuated by another motor having stator windings 1 and rotor 2. When the lift is in motion the stator windings 1 are connected in star and the brake is lifted. To bring the lift to rest at a desired floor, the windings 1 are changed to a delta-connection with coils 11 of a saturable inductance connected in series therewith. The control windings 12 of the inductance are supplied through rectifiers 13 under the control of a valve 21 the grid circuit of which comprises a tachometer generator 23 driven by the brake motor and a tachometer generator 26 driven by the lift motor. When a switch 28 is opened, a capacitor 27, which is charged from the generator 26 during the acceleration period of the lift, discharges through resistor 24 so that the grid potential of the valve 21 is adjusted and the coils 12 are supplied with direct current. The impedance of coils 11 is thus reduced so that the brake is partially lifted, the arrangement being such that the retardation of the lift is substantially constant. When the speed of the lift has reached a desired low levelling value a valve 29 becomes conductive due to the difference between the voltage tapped from potentiometer 20 and the voltage of a lift-driven tachometer generator 32 reaching a low value. The increased voltage developed across resistor 25 raises the grid potential of valve 21 so that the impedance of coils 12 is reduced and the brake is lifted. In order to bring the lift to a standstill, a change-over switch 34 is moved to discharge capacitor 33 through resistor 35 whereby the brake becomes completely operative. In a modification, the control grid of the valve 21 is connected to potentiometer 19, and the circuit elements 23-27 to the cathode of the valve. In another arrangement, the resistor 25 is replaced by the generator 26, Fig. 2 (not shown).
Patent GB-867096-A (GB)
Title: Improvements in or relating to cathode-ray tubes
IPC: H01J29/32
Filed: 1957-07-22
Abstract: 867,096. Colour television tubes. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 22, 1957 [July 25, 1956], No. 23109/57. Class 39(1). A colour television picture tube has a multi-colour screen in which the grains of the luminescent colour of greatest subjective intensity (green) are individually enveloped in a relatively thick substance, while the grains of the other colours (blue and red) are enveloped in relatively thinner substances or not at all in order to balance out the light output effect of the bombardment of the screen by secondary electrons produced at colour selection and/or postfocusing grids or masks. The enveloping substance may be an oxide or a mixture of oxides of silicon, magnesium or aluminium and may be applied by a method described in Specification 501,741, 521,099 or 626,657.
Patent GB-1496265-A (GB)
Title: Devices for determining the fuel/air ratio of an internal combustion engine
IPC: G01N27/12
Filed: 1975-05-27
Abstract: 1496265 Exhaust gas sensor FIAT SpA 27 May 1975 [23 July 1974] 23144/75 Heading G1N A device for determining the air/fuel ratio in an I.C. engine comprises a semi-conductor metal oxide powder 21 sensor compressed between two electrodes 23, 25 and a sleeve 22 of porous ceramic material. The oxide is Cr203, TiO 2  or MoO 3 . In use the device is immersed in the exhaust gases of the engine and is connected as shown in Fig. 1 or in a Wheatstone bridge having in an adjacent arm a similar sensor but having a gas impermeable ceramic sleeve, Fig. 3 (not shown), for temperature compensation.
Patent GB-663544-A (GB)
Title: Improvements in and relating to thermionic valve amplifiers
Inventor: THOMASON JAMES GORDON
IPC: H03F3/36
Filed: 1948-09-02
Abstract: 663,544. Valve amplifying circuits. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Sept. 29, 1949 [Sept. 2, 1948], No. 23183/49. Class 40 (vi). A direct coupled amplifier for use down to a predetermined very low frequency has a negative feedback path effective only at frequencies below the predetermined very low frequency. As shown, part of the output of a two-stage direct-coupled amplifier V6, V7 is fed to a Miller integrator valve V5 from a potentiometer R27, R28. The voltage developed at the anode of the Miller valve V5 is applied as negative feedback to the screen grid of the first valve V5. The Miller integrator circuit provides a large effective capacity between the grid and cathode of valve V5, so that resistor R28 is effectively shunted by a large condenser and the feed-back is effective only for very low frequencies. In a three-stage directcoupled amplifier, Fig. 1, not shown, part of the output is fed to a cathode follower from a resistor shunted by a large condenser, and the output of the cathode follower provides negative feed-back for the screen grid of the first valve. The Specification gives circuit values for amplifiers operating down to 0.1 c/s.
Patent GB-263713-A (GB)
Title: Improvements in or relating to conduit fittings
IPC: H02G3/06
Filed: 1925-09-30
Abstract: 263,713. White, A. E. (Erie Malleable Iron Co.). Sept. 30, 1925. Caulking.-The covers 17 of conduit boxes are fitted with screws 18 having reduced necks 22, Fig. 5, each screw being loosely but permanently attached to the cover, by indenting the cover at 24 to reduce the aperture after the screw has been inserted. Specifications 241,538 and 263,543, [both in Class 99 (i), Pipes and tubes, Joints. &c. for], are referred to.
Patent GB-171169-A (GB)
Title: Improvements in swath turners and side delivery rakes
IPC: A01D78/14
Filed: 1920-08-10
Abstract: 171,169. Parkinson, F. Aug. 10, 1920. Haymaking.-In a swath-turner and sidedelivery rake or hay-collector, the tines are fitted in slotted holes near the edges of rotary discs or their equivalents so that they may rise and fall on uneven ground, and are arranged approximately horizontal with their ends pointing backwards, so that they are withdrawn from the hay whilst in horizontal positions by the forward movement of the machine. The frame a ismounted on two main wheels c and a castor wheel c', the driver's seat h being at the back. The tine-carrying discs m are fixed on tubes k mounted on non-rotary shafts l adjustably supported by the axle b and a notched cross-bar f. The tubes k are rotated by the reversible bevelgearing shown. In a modification, the shafts l may be rotated instead of the tubes k. The long tines n are fitted in tapered slots s, Fig. 3, in the disc m. Their heads enter a groove t, and a second disc o is bolted to the back of the disc m. The tines may be straight or slightly curved outwards. They may have shoulders to hold them in position, or may be mounted on pivots which may be long enough to pass through several tine heads. A wheel may be mounted on an inclined support adapted to be brought into a vertical position for raising the tines from the ground; or castor wheels may be mounted at the ends of theshafts l.
Patent GB-424501-A (GB)
Title: Improvements in and relating to closets
Filed: 1933-08-22
Abstract: 424,501. Dry closets. JACKSON, E. L., 101, Gray's Inn Road, and CHRISTOPHER, S. A., 62, Crouch Hill, both in London. Aug. 22, 1933, No. 23392. [Class 26] A closet comprises a sewage-receptacle and a member provided with a seat and optionally also with a lid which are so dimensioned and arranged that the receptacle and the member may be telescoped or located one within the other for transport or may be engaged together in such a manner that the seat is maintained at a height convenient for use. In one form, Fig. 1, the sewage-receptacle 1, has brackets 12 bent as shown and apertured at 15 to receive lugs 16 carried by the seat-member 11. The seat-member may also be lowered so that it is accommodated between the brackets and the receptacle, the lugs then resting upon the lower cranked portions of the brackets. In another form, Fig. 3, the seat-member 18 has a bead 22 to co-operate with the upper edge of the sewage-receptacle 1 and thus support the seat-member, and also lugs or a flange 21 to support the sewage-receptacle 1 when the seat-member is placed therein. Handles such as 17, 24 ventilating apertures 20, and a shield of the form described in Specification 405,962, may also be provided.
Patent GB-457675-A (GB)
Title: Lamp base for electric lamps with double or multiple filament
IPC: H01K9/04
Filed: 1935-08-20
Abstract: 457,675. Two-part couplings. FARINA, C., 2, Rue de Lancry, Paris. Aug. 20, 1935, No. 23399. [Class 38 (i)] In multiple - filament electric lamps of the bayonet - joint type wherein a rotary switch member on the lamp base is arranged to make contact with any one of a number of contacts each associated with a filament, the arm 8 is pivoted on one of the main contacts 4 of the lamp cap and operates in conjunction with separate filament contacts 8, 10 arranged on a diameter at right-angles to the diameter which passes through the centres of both main contacts 3, 4. The contact plates 3, 4 are secured to a block 1 of insulating material forming the bottom of the lamp base 2, the contact 3 being common to the two filaments. The switch arm 8 is pivoted to the contact plate 4 by means of a rivet 7 and, in the example, the contact plate is embossed to form between itself and the insulating block 1 a housing 4a within which the arm 8 can move, the edges of the housing forming stops to limit the angular movement of the switch arm. In addition, the contacts 9, 10 may be located within a recess 1a with sides 1b which also serve to limit the displacement of the switch arm. The switch arm consists of a metal tongue, preferably resilient, with a flat portion located within the housing 4a and an embossed or shaped outer end with rounded or obliquely raised edges which slide over the contacts 9, 10. Recesses, notches or flutings, may be formed in the part of the arm 8 which engages the contacts. In a modification a separate bowed spring strip is located between a substantially flat contact arm and a covering plate, these three members being secured by the rivet which forms the pivot for them.
Patent GB-1217946-A (GB)
Title: Monitoring the concentration of optically permeable solutions
IPC: H01M8/06
Filed: 1968-05-16
Abstract: 1,217,946. Photo-electric analysis. SIEMENS A.G. May 16, 1968 [May 26, 1967], No.23454/68. Heading G1A. [Also in Division G3] In a method and device for testing the concentration of an optically permeable solution 2 a beam of light is directed through a reference medium 1 that is optically more dense than the solution to be incident upon an interface between the medium and the solution at such an angle that the beam is totally internally reflected at the interface, if, and only if, the concentration of the solution is less than a preselected minimum acceptable value, the occurrence of total reflection being detected by a photo-electric transducer 15 positioned to receive the beam. The arrangement is applied to regulating the concentration of the electrolyte of a fuel cell 6 by means of switches 17-19, the electrolyte flowing through a chamber 2 in which its temperature may be measured to control the angle of the beam for temperature compensation purposes. Photo-cells 14, 16 may effect regulation when the concentration is such as to permit refraction of the beam. The reference medium may be polymethylmethacralate.