baber/WOPTO huggingface dataset:
Patent GB-792391-A (GB)
Title: Improvements in or relating to magnetic amplifiers
IPC: G08C19/48
Filed: 1956-02-24
Abstract: 792,391. Servo systems. BENDIX AVIATION CORPORATION. Feb. 24, 1956 [March 2, 1955], No. 5873/56. Class 40 (1). [Also in Group XXXIX] Two saturable transformer cores, which may be three-legged cores, have primary windings 77, 82, energized from an A.C. source 33; secondary windings 78, 83, which provide a balanced output for a motor M; control windings 75, 80; and auxiliary windings 79, 84, which supply rectifiers 88, 89 to provide voltage feed-back to windings 76, 81. As applied to a servo system a voltage across rotor winding 26, due to displacement of rotor winding 22 of the inductive device 20, is preamplified by valve 40 and further amplified by the push-pull arrangement of valves 44, 45, the anode loads of which are the control windings 75, 80. Current in the control windings causes the permeability of one core to be increased and the other reduced to provide a differential output. The output voltage appearing across the winding 31 of motor M is added to the increase in voltage across one auxiliary winding and subtracted from the reduced voltage across the other auxiliary winding to alter the outputs of feed-back rectifiers 88, 89. The output of the rectifiers may supply the windings 76, 81 with positive or negative feedback. The motor M drives a shaft 27 through gears 28 to restore rotor 26 to a null position.
Patent GB-434124-A (GB)
Title: Improvements relating to step-by-step electrical transmitters
IPC: G01C19/28
Filed: 1934-02-23
Abstract: 434,124. Electric selective signalling systems. SPERRY GYROSCOPE CO., Ltd., Great West Road, Brentford, and PARKER, M., 687, Great West Road, Isleworth, both in Middlesex. Feb. 23, 1934, No. 5977. [Class 40 (i)] The transmitter of a three wire signalling system comprises one or more pairs of contacts carried by a carriage which slips onto the main shaft of the transmitter, the contacts sweeping over the surface of a stationary segmental ring the segments of which overlap at their ends so that contact may be made simultaneously with two segments. The contact carriage is driven through an adjustable lost motion device. As shown in the Figures the transmitter is driven by toothed ring 5, which may be part of a gyro-compass, meshing with pinion 6 which drives the conically shaped arm 23 through gearing 8, 9 and slotted ring 22. The arm 23 slides on a square portion of the shaft 10 and can be adjusted by screw 24 to alter the clearance between the slot in ring 22 and the faces 25 of arm 23 and thus to regulate the amount of lost motion. The shaft 10 is rotated with the arm 23 and moves the roller contacts 13 and brush 14 over the segmental ring 12 and the continuous ring 11 respectively. Current of one polarity is connected to ring 11 and this is connected through brush 14 and the adjacent roller contact 13 to the segments of the ring 12. Current of the other polarity is connected to the other roller contact 13 through stud 19 and graphite disc 18. The roller contacts are spring pressed against the segmental ring as indicated in Fig. 3, and the brush carriage can be slipped off the shaft 10 by swinging back the arm 20. The segmental ring is shown developed in Fig. 6, where the segments are numbered 1, 2, 3, in repetition and the facial overlapping of the segments is illustrated. As the roller contacts are 180‹ apart and move in the same plane each impulse line has five equal steps of one polarity, one idle step and five steps of the opposite polarity followed by another idle step. The repeater motor moves one step for each step spacing of the transmitter. In another embodiment the segmental ring 12 is made wider and the roller contacts 13 are divided into two roller contacts mounted one above the other. In this embodiment the brush 14 is a plunger type spring urged contact co-operating with a flat ring which faces downwards.
Patent GB-687419-A (GB)
Title: Improvements in or relating to non-skid chains for the wheels of road vehicles
Inventor: BILLINGHAM JOSEPH ERIC
IPC: B60C27/06
Filed: 1950-03-10
Abstract: 687,419. Wire and like strainers. BILLINGHAM. Ltd., J. March 5, 1951 [March 10, 1950]. No. 6035/50. Class 45 [Also in Group XXXIV] The strap by means of which a tyregaiter of the kind described in Specification 500,250 is secured to a wheel consists of a narrow metal strip 13 with its free end 28 provided with slots 16 for selective engagement by the lever 17 of the fastening-device carried by the other end of the gaiter. The strip 13 is shaped to the general profile of the wheel-rim and, to protect the latter, is shown provided with a sleeve 27 of leather, rubber or other soft material.
Patent GB-658974-A (GB)
Title: Improvements in or relating to radio distance measuring apparatus
IPC: G01S7/282
Filed: 1948-02-27
Abstract: 658,974. Radiolocation. POTAPENKO, G. Feb. 27, 1948, No. 6049. Convention date, May 2, 1939. [Class 40 (vii)] A pulse radar system, for use particularly for an altimeter for aircraft, comprises means for initiating a current at the beginning of each transmitted pulse and for terminating the current at the beginning of the corresponding reflected pulse, the current being passed through a current meter which consequently indicates the distance of the reflecting object. The output of radio-frequency generator 10 is interrupted by the relay 14 controlled by the circuit 15 which generates pulse signals having a mark-space ratio of the order of unity. As shown, a mechanical relay is used, but electronic relay devices may alternatively be used. The pulsed signal is transmitted from aerial 16 and the reflected signal is received on aerial 31 ; for use as an altimeter the aerials are arranged one under each wing of the aircraft. The received signal is amplified at 33. The transmitted and received pulse signals are rectified at 23 and 38 to yield signals as shown at d and r, Fig. 2, respectively. These signals are passed. through filters 25 and 40, each comprising a half-wavelength element of opencircuited transmission line with an output tapped off from midway along the transmission line, to remove the radio-frequency components, and are then applied differentially to a circuit comprising a meter 47 and a rectifier 46. The rectifier is so poled that it passes the signals d but is non-conductive to the signals r. The gain of the amplifier 33 is adjusted so that the amplitude of signal r is greater than that of signal d; it will consequently be seen that, in each cycle, only during the interval between commencement of the transmitted pulse and commencement of the received pulse will current flow in the meter 47. The pulserepetition frequency may have any one of several different values dependent on the range to be measured. Meter 47 is calibrated appropriately for each pulse recurrence frequency. The cessation of the transmitted pulse may be produced by the received pulse which is, in this case, applied to circuit 15. In a modification, Fig. 4 (not shown), a flipflop circuit having two stable states is used, the transmitted pulses being applied to one valve thereof and the received signals to the other valve. A meter in the anode circuit of the appropriate valve measures range. In this arrangement short pulse signals may be used instead of the long pulses of the previous arrangement. Specifications 497,147, 511,093, [Group XXXVI], and U.S.A. Specification 2,055,883 are referred to.
Patent GB-746130-A (GB)
Title: Improvements relating to pipe element and the assembly thereof with another element
IPC: F16L15/04
Filed: 1954-03-02
Abstract: 746,130. Screw-threads. COMPAGNIE DE PONT - A - MOUSSON. March 2, 1954 [March 5, 1953], No. 6059/54. Class 80(3) [Also in Group XXVIII] The profile of a thread 3 provided on the end of a pipe is dissyminetrical, the width a of the thread at a level XX midway between the crest 4 and root 5 of the thread being less than the width b of the groove between two adjoining thread turns, and the profile of the thread being a continuous curve which has a progressive variation in slope and includes radiused portions r, R of opposite curvature connected along a common tangent TT and, for example, at a point of inflection m. The radius r at the crest 4 is smaller than the radius R at the root 5. The ratio a/b may be <SP>1</SP>/ 3  or less, and the ratio p/h is at least equal to 2. The thread 3 may be a single or multi-start thread, helical in form and conical such that the crests 4 and roots 5 are tangential to parallel conical surfaces coaxial with the axis of the pipe and have generatices AA, BB, the' angle of the apex of those surfaces being about 6 degrees. The axis x-x of the transverse section of the thread through a plane containing the longitudinal axis of the pipe is perpendicular to the generatices AA, BB. Washout thread portions 6, 7 having conical surfaces CC, DD of an included angle of 45 degrees may be provided, and the areas s<SP>1</SP>, s<SP>2</SP> corresponding to the portion of the thread 3 outside a straight line E<SP>1</SP>E<SP>1</SP>, parallel to surfaces AA, BB, and the portion of the section of the groove between the adjoining threads are equal, although the area s<SP>1</SP> may exceed the area s<SP>2</SP> by 1 to 5 per cent. In a modification Fig. 5 (not shown), the thread lies between two cylindrical surfaces parallel to the axis of the pipe and the radii r, R at the crests and roots 4, 5 of the thread are connected by straight flank portions.
Patent GB-990675-A (GB)
Title: Improvements in light projectors
IPC: H01J65/08
Filed: 1961-02-20
Abstract: <PICT:0990675/C4-C5/1> A visible, ultra-violet or infra-red light projector has a cavity 6 accessible from the outside through a passage 10 for receiving a radioactive luminescent light source, a radioactive luminescent light source 7 in the cavity, and a reflector 3, 4 in spaced relation thereto, the cavity 6 being within a body 1 of transparent filling material, such as glass or plastic, filling the reflector and acting as a radioactive radiation guard after the light source has been inserted into the cavity.  The surface 5 of the body 1 acts as a light-emitting surface and can be flat or shaped to act as a lens.  The centre of the cavity 6 can be at the focus of the reflector 3, 4 or other point determined by the reflector and the surface 5.  The body 1 can be formed of plies of transparent material and the plies close to the cavity 6 can be of substantially radiation resistant material of high mechanical strength. The outside of the body 1 can be of radiation resistant material.  The cavity 6 can be divided into cells and can be spherical or in the form of a narrow tube.  The reflector 3, 4 can be in the form of a paraboloid of revolution or of an elliptical or parabolic cylinder.  Radioactive gas under pressure, e.g. krypton 85 alone or in combination with a solid radioactive isotope, can be contained in the cavity 6.  The light source can consist of a physical or chemical combination of a luminescent substance with a radioactive isotope.  The wall of the cavity 6 can be coated with a luminescent substance with a radioactive isotope adhering thereto. The cavity wall can have a luminescent substance and a radioactive isotope embedded therein.  A part of the cavity free of the luminescent substance and isotope can accommodate at least a further radioactive isotope.  The luminescent substance and radioactive isotope can have a bonding agent added thereto. Activated zinc sulphide is referred to as a luminescent substance.
Patent GB-272859-A (GB)
Title: Improvements in spray drying
IPC: A23C1/04
Filed: 1927-03-04
Abstract: 272,859. Industrial Associates, Inc. June 18, 1926, [Convention date]. Spray evaporators. - In drying liquids and semiliquids, the material is sprayed by a centrifugal sprayer 18 into hot air or gas in a chamber 2 surrounded by an outer chamber 1, divided by a partition 3 into compartments 4, 5. Hot gas, supplied through an inlet 6, passes through the upper compartment 4, enters the drying chamber 2 through an opening 11 in the disned cover 10, and passes away through the open bottom to the lower compartment 5 and outlet 7. The dried material falls on to the floor of the chamber 1 and is removed by a rake 14. Openings 12 may admit hot gas to the top of the chamber 2.
Patent GB-676101-A (GB)
Title: Improvements relating to document files or folders
IPC: B42F15/00
Filed: 1949-03-08
Abstract: 676,101. Suspended files. BARRETT, M. S., and BARRETT, J. March 6, 1950 [March 8, 1949], No. 6238/49. Class 146 (i). A device for attachment to document files or folders to permit of their vertical suspension on rods or bars at the sides of a drawer comprises a strip a to be secured to the back of the file d and having channels b in which slide retractable hooks h at each end to act as supports. The hooks h may be formed by a slide e of bent wire or a flat strip e', the strips a being dented, at each end at c after their insertion to prevent complete withdrawal, the strip e' having a slot f in which the dent c slides. The strip a is secured to the inside of the file d by rivets, staples or the like.
Patent GB-900330-A (GB)
Title: A method and apparatus for finely perforating webs or tapes
IPC: B26F1/28
Filed: 1961-02-21
Abstract: 900,330. Perforating by burning. FROHLING, H. J. Feb. 21, 1961 [Feb. 24, 1960], No. 6316/61. Class 31 (1). [Also in Group XL (a)] A method of perforating a web, e.g. of cigarette paper comprises passing the web through a highfrequency field and periodically causing breakdown of the field through the web to produce arc-overs which perforate the web. As shown in Fig, 1, a web 36 fed from a reel 25 is passed between a driven electrode disc 46 and a driven electrode roller 16 which are connected to a generator 50 which produces a high-frequency field between them and to an adjustable voltage device 52 which periodically applies high voltage impulses to them which are sufficient to cause are-overs whereby the web is perforated. The disc 46 comprises an insulating ring 64, Fig. 3, having bores through which extend electrodes 66 which are adjustably secured in position by dowels 67 which press against a metallic contact disc 65. The axis of the disc 46 may be parallel or inclined to the direction of feed of the web. The electrodes 66 may be arranged in a plurality of rows the distance between which is adjustable. The web may be passed through more than one apparatus arranged in series.
Patent GB-439234-A (GB)
Title: Improvements in and relating to electric discharge devices
IPC: H01J9/04
Filed: 1934-02-27
Abstract: 439,234. Thermionic cathodes. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl Ufer, Berlin) Feb. 27, 1934, No. 6340. Void [Abridged as open to inspection under Sect. 91 of the Acts, Aug. 29, 1934]. [Class 39 (i)] A method of making a cathode consists in starting with a compound of a refractory metal and an alkaline or rare earth metal and treating the compound in a reducing atmosphere to reduce it to the refractory metal and an oxide of the alkaline or rare earth metal. The compound may be barium tungstate, molybdate or rhenate, or bariumnickel cyanite or other barium-nickel double salt. It is placed upon a foundation metal, tungsten, molybdenum, rhenium or nickel respectively, reduced in a stream of hydrogen and sintered. Or a mixture of materials, e.g. 90 per cent barium tungstate and 10 per cent calcium tungstate may be used. Kaolin or aluminium oxide may be added if desired. In another example, thorium and cerium tungstates are used in such proportion that the resulting thorium oxide and cerium oxide are in the ratio 99.1 to 0.09. If filaments are made of the material powdered refractory metal may be added to increase the conductivity
Patent GB-307028-A (GB)
Title: Improvements relating to thermionic valves
IPC: H01J7/18
Filed: 1929-03-01
Abstract: 307,028. Loewe, B. March 1, 1928, [Convention date]. Vacuum tubes.-Electron-emitting substances, such as barium, strontium, &c. are deposited on the cathodes of thermionic valves by enclosing the metal, or the materials from which it is to be evolved, in a metal capsule, attaching this to the anode or other part of the valve and subsequently heating the capsule. In the form shown in Fig. 3, the anode 3, formed from flattened plates united at their edges, is provided with apertures 6 over which are secured, by spot welding, metal capsules 8 containing the emitting substance, such as is described in Specification 306,960. The parts of the anode round the aperture 6 project beyond the edges of the capsule 8 and so prevent loss of the material should this become detached. Where a cylindrical anode 13, Fig. 4, is employed, an elongated bowl-shaped container 18, Fig. 4, may be placed inside the anode. The material may be held together by means of a binder or it may be held therein by a metal grating and be covered with a protective coating such as paraffin wax. Heating of the capsule may be effected by eddy currents, by the heat given off by the cathode filament, or by a resistance incorporated in the valve. In the lastmentioned case, the circuit of the resistance may be broken when desired by increasing the current so as to fuse a thin spot provided in the leads. The Specification as open to inspection under Sect. 91 (3) (a) states' also that where a cylindrical anode 13 is employed, the capsule 8 is situated opposite one end thereof, Fig. 4 (Cancelled), and the container may be secured to one of the parts of the valve. The material may be forced into the container in the form of a capsule. Deposition of substances in incandescent lamps and R÷ntgen-ray tubes may be effected in a similar manner. This subject-matter does not appear in the Specification as accepted.
Patent GB-140894-A (GB)
Title: Improvements in and relating to means for automatically recording the transmitted speed of any setting of a variable speed change gear combination
IPC: B60R16/037
Filed: 1919-03-18
Abstract: 140,894. Gallimore, J., and Thomson, Ltd., D. March 18, 1919, Variable-speed gearing.-A toothed change. speed gear a is arranged in series with a belt variable-speed gear u, and means are provided for indicating the speed combination in use. The controlling-means of the toothed gear operates through a rod g to turn a quadrant so as to bring either of two scales such as l opposite a fixed viewing-space t'. The controlling-means of the belt gear traverses a pointer o over the scale pre. eented.
Patent GB-415343-A (GB)
Title: Method of uniting parts
IPC: B23K11/16
Filed: 1934-03-03
Abstract: 415,343. Securing wheels on shafts. CHAMPION SPARK PLUG CO., Upton Avenue, Toledo, Ohio, U.S.A. March 3, 1934, No. 6869. Convention date, Jan. 25. [Class 80 (ii).] Parts, such as a wheel 10 and shaft 11, are united by assembling with a uniting pocket 14 between them, inserting granular conductive material 13 into the pocket and passing an electric current through the material to melt it. The material which may consist of aluminium or other metal mixed, if desired, with ceramic powder is preferably compacted into the pocket which may have recesses &c. to key it, and may be coated to avoid loss of current. A ring 16 of copper or other conductor may be placed on the material to prevent it from sticking to the electrode 15 which may also apply pressure.
Patent GB-1492723-A (GB)
Title: Electroforming of thin metal structures
IPC: C25D1/08
Filed: 1976-02-23
Abstract: 1492723 Electro-forming metal patterns SIEMENS AG 23 Feb 1976 [19 March 1975] 6991/76 Heading C7B A metallic pattern e.g. for electronics applications, is made by electro-forming on to a conductive surface of a carrier via an electrolyteresistant negative mask, followed by removal of the mask and etching away the carrier, except for a peripheral portion which is protected and remains as a support for the electro-formed pattern. The carrier may be brass or glass, the latter bearing metallic layers e.g. Cu on Ti. The pattern may be protected during etching by varnish or electrolytic Cu. The pattern may be Ni or Au and be annealed after etching. The mask may be produced by photo-lithography.
Patent GB-573365-A (GB)
Title: Improvements in or relating to high-frequency transformers
IPC: H01P5/02
Filed: 1941-06-03
Abstract: 573,365. High-frequency transducers. COLLARD, J. June 3, 1941, No. 7042. [Class 40 (iii)] A transformer or transducer for high-frequency currents comprises a cylindrical conductor C a half-wave-length long and two inner conductors R1, R2 short-circuited by end-plates which are formed with central holes for the reception of lengths of coaxial cable CC terminating in short-circuiting loops L1, L2. There is thus a mutual coupling between each loop and the twin circuit formed by the conductors C, R1, R2 dependent on the protrusion of the loops into the interior of the cylinder and on their angular relation to the conductors R1, R2 and the arrangement is equivalent to the three-winding transformer in Fig. 3. The loops are split to introduce series capacities C1, C2, which are adjusted to tune out the selfinductances S1, S2 of the loops at the operating frequency. For efficient transfer of power,. the resistance R of the twin circuit should be as small as possible and the coupling as tight as possible. The length of the conductor C may be adjusted if necessary by means of a small screwed plug. The two inner conductors may be replaced by a single central conductor with the loops placed off-centre, or four spaced conductors may be used. The dimensions may be reduced if the cylindrical space is filled with a material of high dielectric constant. A variable attenuator may be formed by connecting a given length of cable to one of the loops.
Patent GB-1071264-A (GB)
Title: Combination clarifier or thickener and storage tank
Inventor: CHRISTIANI WALTER
IPC: B01D21/00
Filed: 1963-02-21
Abstract: 1,071,264. Settling tank. DORR-OLIVER Inc. Feb. 13, 1964 [Feb. 21, 1963], No. 7096/63. Heading B1D. A settling tank 10, having raking means 16 pushing solid sediment to outlet 17, has a vertically extending feedwell 11 into which liquor is introduced by conduit 12, the liquor descending under the lower end of feedwell 1 1 and being discharged into an outlet conduit 13, located well down in tank 10 to leave ample storage space for clarified liquor above normal discharge level so as to accommodate variations in influx and discharge of liquor. As shown, feedwell 11 extends to the top of the tank and itself forms storage space for unclarified influent liquor. In Fig. 2 (not shown) feedwell (11a) is closed at the top and extends only up to just above outlet 13. An emergency overflow 22 is supplied, and a plurality of discharge outlets and inlets may be provided at different levels and controlled by float valves, discharge being always from the highest outlet possible. Feedwell 11 and rake 16 are both suspended from top support 19, which carries the rake drive motor. The tank may be divided by partitions into a plurality of vertically spaced settling zones, each with a rake and solids discharge port and a clarified effluent outlet, all such outlets being connected to a common header leading from the common storage space above the uppermost zone and continuous therewith.
Patent GB-906772-A (GB)
Title: Improvements in or relating to electromagnetic relays
Inventor: DISTIN LIONEL SPARKE
IPC: H01H50/30
Filed: 1960-03-01
Abstract: 906,772. Electromagnetic relays. ERICSSON TELEPHONES Ltd. Feb. 24, 1961 [March 1, 1960], No. 7140/60. Class 38 (5). In a relay having the actuating mechanism of Specification 896,565, i.e. two armatures 10 pivoted about axes parallel to shaft 21 to which they are linked by spring blades such as 11, the shaft carries a disc 31 on which are mounted change-over bridging contacts 36. These bridge flush contacts 38, 39 which may be printed contacts, and on rotation of the shaft the bridging contacts remain in engagement with contacts 39 but change from one of contacts 38 to the other.