baber/WOPTO huggingface dataset:
Patent GB-1007970-A (GB)
Title: Improvements in and relating to electric converting circuits
IPC: H02M5/27
Filed: 1962-07-30
Abstract: 1,007,970. Converting. LICENTIA PATENT-VERWALTUNGS-G.m.b.H. July 30, 1962 [July 28, 1961], No. 29182/62. Heading H2F.  In a converting arrangement, control signals for one controlled rectifier are derived from the secondary of a transformer whose primary is connected, in series with a resistor and another rectifier of the arrangement, to an A.C. supply. Two rectifiers, 2, 2<SP>1</SP> (Fig. 4) connected in a biphase rectifying arrangement to supply a load 6, also supply through resistor 7 the primary 4 of a transformer with a current which lags the supply voltage. Therefore the voltage induced in secondary 5 has a high value when the supply voltage passes through zero, which is when the rectifiers are required to trigger To start the circuit rectifier 2 is triggered by a signal applied at terminals 8, and when the supply changes polarity at each half-cycle both rectifiers are receiving a trigger signal, and the forward biased one conducts. To stop the arrangement the secondary circuit is broken by switch 9. The resistor 7 may be in the D.C. load. A three-phase rectifier (Fig. 5, not shown) has three rectifiers with their control electrodes connected through individual resistors to a common secondary in a similar manner to that described above. Phase converting.-A single-phase to threephase converter (Fig. 6, not shown) and Fig. 7, has six controlled rectifiers and six transformers arranged so that only one rectifier conducts at a time, and the frequency of the output is onethird of that of the input. The transformer whose primary is associated with one rectifier controls a rectifier connected in the opposite sense to the supply and to a different phase of the output. More than one controlled rectifier may be connected in series, and the transformer may have more than one secondary.
Patent GB-694804-A (GB)
Title: An improved method of and apparatus for the cooling, crystallization and phase separation of crystallizing hot liquids
IPC: B01D33/00
Filed: 1950-11-29
Abstract: <PICT:0694804/III/1> <PICT:0694804/III/2> Liquids capable of producing crystals on cooling are cooled within a centrifugal strainer-separator to produce crystals during their passage between the point of discharge of the feeding means and the screen of the centrifuge.  Cooling is effected by exposing a large liquid surface to the air in the centrifuge and/or by feeding a cooling gas or liquid into the centrifuge.  In addition the outer surface of the centrifuge screen may be cooled.  As shown in Fig. 1, liquid is fed by line 2 to nozzles on a pipe 4 p  within the rotor 5 of the centrifuge.  Atomizing gas, which may be the vapour of a solvent for impurities, is fed to the nozzles by a pipe 7.  In addition a cooling liquid, which may also be a wash liquid, is fed by line 10 to nozzles on a pipe 12 and spaced immediately behind the nozzles on pipe 4 (not, as shown for convenience, at 180 degrees distant).  Fluid from a line 15 cools the outer surface of the rotor.  Fig. 2 shows a modified nozzle in which cooling liquid is sprayed from annular tubes 20 surrounding the nozzles 19 from which the crystallizing liquid is sprayed.
Patent GB-1083036-A (GB)
Title: Improvements in modulated radio-frequency power amplifiers
Inventor: MAYO CHARLES GILBERT
IPC: H03F1/06
Filed: 1963-07-23
Abstract: 1,083,036. Amplitude modulator. BRITISH BROADCASTING CORPORATION. July 17, 1964 [July 23, 1963], No. 29194/63. Heading H3R. A modulator for producing amplitude modulated signals from a width modulated pulse train comprises two push-pull pairs of class C amplifiers 30, 31 and 32, 33 to each pair of which square-wave switching signals at carrier frequency are applied from source 42 via transformers 40, 42 and to which a pulse train having a recurrence frequency which may be equal to that of the switching signals and width modulated by the information being transmitted is applied via transformer 47. The anodes of the first pair of amplifiers 30, 31 are connected via tuned circuit 37, and winding 35 of a bifiler choke 34 to the H.T. supply and the anodes of the second pair 32, 33 are connected via tuned circuit 39 and winding 36 of the choke to earth. The tuned circuits are interconnected by capacitors 48, 49 and a load 38 is connected to tuned circuit 37.
Patent GB-510345-A (GB)
Title: Card register
IPC: B42F17/02
Filed: 1937-10-26
Abstract: 510,345. Filing papers. ROSEN, N. I. Oct. 26, 1937, No. 29201. Void. Convention date, Oct. 26, 1936. Application for addition to 458,299. [Class 146 (i)] The filing - apparatus described in the parent Specification in which strips 6 separating the filed cards &c. are pivotally mounted in a box and arranged in oblique rows, is modified by providing means whereby the strips are secured in the box. In one form, Fig. 5, each strip 6 has a slot at its lower edge adapted to fit over a bar 4 fixed in the box and to be engaged by a bar 5 slidable in the box to-lock the strip in the box. In modified forms, the slot is T-shaped and the bar 5 is situated above or.below the bar 6. In another construction, Fig. 6, a projection on the strip 6 projects through a slot in the box bottom and the locking bar 5 is slidably mounted beneath the bottom. In a further arrangement, the bar 5 engages a closed elongated slot in the strip 6.
Patent GB-1094101-A (GB)
Title: Improvements in or relating to electric space heaters
IPC: H05B3/00
Filed: 1963-07-24
Abstract: 1094101 Radiant heaters A BIKKER 16 Oct 1964 [24 July 1963] 29235/63 Headings F4W W45D and W14Y A wall mounting radiant heater comprises an elongated U-shaped element 12 (resistance wire in silica tube) mounted in a trough-shaped reflector- 10 and enclosed by a wire guard 46. The reflector is secured at one end to the pivoted cover-member 24 of a wall-mounted terminal box 37. The cover houses a cord-operated switch 26, and its pivotal movement is limited by a screw 40 coacting with an arcuate slot in the side of the cover-member.
Patent GB-389551-A (GB)
Title: Improvements relating to concrete, cement, reinforced concrete and like floors
IPC: E04B5/29
Filed: 1931-10-22
Abstract: 389,551. Concrete floors. CARSON, N. B., 140, West George Street, Glasgow. Oct. 22, 1931, No. 29315. [Classes 20 (ii) and 20 (iv).] Reinforced -concrete floors casting in situ.- The floors have ribs and main beams beneath, and are cast in situ by means of permanent centring 12, 13, which is formed of soundproof material such as fibre board or asbestos cement, supported by members 17, 20, 21 suspended from the cores 5 of the main beams and ribs. The centring may have flanges which meet under the ribs, or separate plates of similar material may be used beneath the ribs. The cores 5 of the main beams are carried by the column cores, so that no props or temporary staging need be used. Specification 308,105, [Class 20 (ii), Buildings and structures, Miscellaneous accessories &c.], is referred to.
Patent GB-642383-A (GB)
Title: Improvements in or relating to scaffolding
Inventor: HAWES ALBERT HENRY
IPC: E04G1/14
Filed: 1947-11-04
Abstract: 642,383. Scaffolding. KWIKFORM, Ltd. Nov. 4, 1947, No. 29356. [Class 20(ii)] A scaffold unit having two upright members 10 connected by one or more cross members 11, 12 has permanently secured to the upper ends of the uprights, clamps 14 which support ledgers 15 on a putlog laid thereon level with the tops of the uprights so that the underside of the platform supported thereon is level with or above the upper ends of the uprights. The ledgers 15 connect a number of parallel frame units supporting the platform. By this means a platform free from projections can be extended over a number of units. Specifications 642,367 and 642,382 are referred to.
Patent GB-600387-A (GB)
Title: Coaster brake
IPC: B62L5/16
Filed: 1945-11-05
Abstract: 600,387. Coaster hubs. BENDIX AVIATION CORPORATION. Nov. 5, 1946, No. 29358. Convention date, Nov. 3, 1944. [Class 136 (ii)] In a back-pedalling hub brake of the kind comprising a fixed axle on which is journalled a driving member, an anchor member non- rotatably mounted on the axle, a wheel hub journalled on the driving end anchor members, an expanding brake sleeve adapted to engage the interior of the hub and slidably but non- rotatably connected to the anchor member and a clutch and brake actuating member screw threaded on the driving member, the actuating member and anchor member having conical surfaces which engage with co-operating conical surfaces in the ends of the brake sleeve, an expanding member 17 is slidably but non- rotatably connected to the expanding brake sleeve 13, 14 and to the anchor member 15, and the clutch and brake actuating member 28 is moved into engagement alternatively with the hub or with the expanding member 17. Keys 21, 22 fitting into recesses 19, 20 in the members 17, 5 respectively prevent rotation of the sleeve 13, 14. Teeth 31, 32 are formed on the meeting surfaces of the expanding and actuating members 17, 28. The clutch 28 has a conical surface 29 engaging with a corresponding surface 30 in the interior of the hub. A drag ring 33 is provided between the clutch 28 and the hub 11 and has outwardly sprung arms 34 bearing against the hub. Alternatively, an annulus 35 may be anchored to the brake expander 17 and have expanding arms 37 which bear frictionally on the cylindrical surface 38 of the clutch 28.
Patent GB-504623-A (GB)
Title: Improvements in or relating to photographic cameras incorporating a range finder
IPC: G03B13/20
Filed: 1937-10-27
Abstract: 504,623. Rangefinders on photographic cameras. ASKANIA - WERKE AKT.-GES. VORM. CENTRALWERKSTATT DESSAU UND C. BAMBERG - FRIEDENAU. Oct. 27, 1937, No. 29388. Convention date, Oct. 27, 1936. [Classes 97 (i) and 98 (i)] In a stereoscopic range-finder for a camera, comprising two independent telescopes 15, 16, each provided with a mark plate, the mark plates 24, 30 are fixed and measurement is effected by mounting in one of the telescopes a parallel glass plate 31 which can be tilted so as to vary the deviation which it produces at right-angles to the axis of the telescope. The tilting movement of the plate is coupled to the focusing movement of the camera objective 12 by providing the rear end of the objective mount with a cam 38 which bears on a roller 37 at the end of an arm 36 secured to one of the pivots on which the plate 31 is mounted. The mark plates are preferably in the form of grids, Fig. 3, the sides 25 of which define the limits of the photographic field. To avoid parallax the telescopes 15, 16 are arranged as shown, one on each side of the axis of the objective, the axes of the telescopes and that of the objective being co-planar.
Patent GB-1377953-A (GB)
Title: Electro-inductive transducers for measurement of displacement
IPC: H01F29/12
Filed: 1971-06-23
Abstract: 1377953 Strain gauges INTERNATIONAL RESEARCH & DEVELOPMENT CO Ltd 29 Nov 1971 [1 Dec 1970 31 Dec 1970 and 23 June 1971]  57113/70 62035/70 and 29508/71 Heading G1N A strain gauge comprises a cantilever arm 41 on a body 42 attached to a base member 43 which is, or is attached to a specimen under test and which moves relatively to the arm 41 in the direction of the arrows 47 when under strain, the member 41 bearing a pair of rectangular, series-connected, opposed spiral coils 45, 46, and the member 43 bearing a rectangular spiral coil 44, so that under strain an unbalance leads to an output from one of the coil arrangements if the other is fed with A. C. The coils 44, 45 and 46 have the same number of turns and are formed by conductive tape or as printed circuits. The arm 41 is of the same material as the test specimen to provide temperature compensation. A waterproof protective housing is provided.
Patent GB-1476627-A (GB)
Title: Flash trimmers for gramophone records
IPC: B29C37/02
Filed: 1974-06-17
Abstract: 1476627 Trimming gramophone records EMI Ltd 17 June 1974 [22 June 1973] 29701/73 Heading B5A Peripheral flash is trimmed from a gramophone record by rotary cutter members 3, 7 the axes of which lie in a plane 14 oblique to the plane 15 of the supported record. Member 3 is cylindrical and rotates with the shaft 6, and member 7 comprises a frusto-conical blade 8 on a cylinder 9 on a shaft 10. The blade 8 overlaps the member 3 and is in sliding contact with its top surface to provide a shearing action on the flash. A prismatic element 17 on a rotary shaft 18 has edges 19 which coact with member 3 to chop the flash into short pieces.
Patent GB-1359386-A (GB)
Title: Pigmenting tio2
IPC: D21H19/38
Filed: 1972-06-27
Abstract: 1359386 Treated TiO 2  BRITISH TITAN Ltd 6 April 1973 [27 June 1972] 29945/72 Heading C1N Pigmentary TiO 2  particles are coated with monoethanol-amine, preferably in amounts of 0À1-2% by wt. The TiO 2  may be anatase or rutile, and may initially be uncoated or coated with oxides of Al, Si, Ti, Zr, Ce or Sn or with Al phosphate. Coating with MEA may be effected by adding the MEA to an aqueous slurry of TiO 2  followed by drying and milling or by spray drying, or by incorporating the MEA during steam fluid energy milling or dry milling. The TiO 2  may then be incorporated into an aqueous slurry containing Ca and Mg ions of reduced viscosity.
Patent GB-791820-A (GB)
Title: Pipe connection, especially for scaffolding
IPC: E04G7/22
Filed: 1955-10-20
Abstract: 791,820. Scaffold clamps. TANGEN, W Oct. 20, 1955 (Oct. 21, 1954], No. 29950/55. Class 20(2) [Also in Group XXVIII] Two scaffolding tubes 2, 3 are connected at an angle by inserting them in the ends of an elbow 1 where they are, held by split-clamps 4, 10 which have bores fitting the pipes and elbow and engage the elbow by ribs and grooves 8, the clamp being tightened by screws 13. The inner surface of the clamping ring 4 may be fluted at 6 to obtain a better grip on the pipe. Tee connections are referred to.
Patent GB-995625-A (GB)
Title: Aircraft flight path angle computer
IPC: G05D1/06
Filed: 1961-09-14
Abstract: 995,625. Computing aircraft flight path. SPERRY RAND CORPORATION. Sept. 14, 1961 [Sept. 30, 1960], No. 33059/61. Heading G1N. [Also in Division G3] The rate of climb h of an aircraft is determined by a vertical accelerometer 10 (Fig. 1) whose output is integrated, and also by a barometric altimeter 16 whose output is differentiated, the two signals being combined at 22 to eliminate long and short term variation errors, and divided at 26 by a speed signal V to determine the flight path angle y of the aircraft by solving the equation sin y = h/V. The unreliable long term conponents of the signal from accelerometer 10 are eliminated by a High Pass Filter 14, and the unreliable short term components of the signal from altimeter 16 are removed by a Low Pass Filter 20, the two filters having equal time constants. The output signal of the apparatus may be augmented by its integral, thus preventing a pilot from returning to a predetermined flight path angle but with lateral displacement, and by its differential, thus preventing the pilot from hunting when changing the flight path angle, the amplitude of the differential signal being made inversely proportional to speed to linearise the sensitivity of the control rod. The vertical accelerometer 10 may comprise a vertical gyroscope which also measures the pitch and bank angles of the aircraft and provides a true vertical acceleration signal, corrected for vertical components of the pitch and bank attitudes. A composite circuit incorporating the additional refinements is shown in Fig. 9. Specification 815,137 is referred to.
Patent GB-1197860-A (GB)
Title: Acoustic Surface Wave Delay Line
Inventor: HEEKS JOHN STUART
IPC: H03H9/42
Filed: 1969-06-13
Abstract: 1,197,860. Electromechanical delay lines STANDARD TELEPHONES & CABLES Ltd. 13 June, 1969, No. 30061/69. Heading H3U. An acoustic surface wave delay line comprises, Fig. 1, a disc 1 of piezoelectric material having on its annular edge 3 a transducer 2 formed by two sets of interdigital contact strips connected, respectively, to two terminals 4 (only one shown). A signal applied to the terminals causes the transducer 2 to launch surface waves which travel around the edge 3 in both directions and arrive back at the transducer after a delay to produce a received signal at the terminals. The time delay is determined by the length of the edge 3. In a modification, Fig. 3, the annular edge 7 carrying the transducer 8 is formed by a raised annular section 6 integral with a piezoelectric base 5. According to another modification, Fig. 4, a ring 9 of piezoelectric material provides four delay lines by four transducers mounted, respectively, on four annular surfaces 10 ... 13. In any one of the embodiments two transducers may be provided situated at diametrically opposite positions on an annular surface of the body of piezoelectric material, in which case the surface waves travel only half way around the annular path, one transducer serving as the input and the other as the output.
Patent GB-285189-A (GB)
Title: Improvements in and relating to grinding or abrading machines
IPC: B24B41/00
Filed: 1926-11-27
Abstract: 285,189. Gee, J. E., Gee, F. S., and Gambell, H. C. Nov. 27,1926. Disc apparatus; magnetic work-holders. - A grinding or abrading machine consists of a grinding-wheel 2 and a rotary work table 1 on which are mounted work-holders automatically opened and closed, means also being provided for feeding the work to the holders and removing it therefrom. Each holder consists of a base 3 carrying a fixed jaw or jaws 6, and a pivoted jaw or jaws 7 normally closed by a spring 12, and opened by a stationary cam 14 beneath the table, which engages an arm 10 secured to the spindle 9 of the jaws 7; the jaws are closed between A and B and opened and again closed in the angle B, C, D. The workpieces are fed singly to the jaws from a container 27, Fig. 4, by movement of tumblers 15 actuated by strikers which engage arms 18. The work pieces are held down during closing of the jaws by spring blades on an endless band 24 or by a magnet in each holder or a part therein energized by a stationary magnet. The work is removed by a rotating wheel carrying magnets from which the pieces are removed into ot1 container by a scraper, or spring fingers may replace the magnets, and an endless band may replace the wheel. A centrifugal separator for metal dust &c. is provided. According to the Provisional Specification, the work-pieces are fed by tumblers actuated by a star-wheel moved by cams on the holders.
Patent GB-910457-A (GB)
Title: Improvements in aquarium assembly
Inventor: WILLINGER ALLAN HAROLD
IPC: A01K63/00
Filed: 1959-09-03
Abstract: 910,457. Aquaria. WILLINGER, A. H., and WILLINGER, H. W. Sept. 3, 1959, No. 30115/59. Class 48. An aquarium comprises a tank 11 of truncated pyramid form made of transparent thermoplastic resin and having side walls with inwardly directed curvature such that water pressure causes them to assume planar positions, a base 10 in which the tank bottom is removably disposed and a removable cover 12. The concavity in the walls of the tank is more pronounced near the top. The base is made of moulded opaque plastic and comprises a rectangular frame 13 of U-section and upright cross-members 18, 19 extending from the bottom of the frame to the bottom of the inner smaller limb 15 of the frame. The upright cross-member 19 is discontinuous at its centre. The tank has a flange 20 and a depending lip 21 at its rim. The cover 12 has a downwardly directed peripheral channel 23 for receiving the rim of the tank and a housing 29 for a lamp and a reflector 54. Studs 26 in the channel 23 engage the top flange 20 of the tank and allow air to enter the cover and a louvred wall 35 in the housing 29 allows escape of air from the cover. The cover has a removable panel 38 slidable on horizontal flanges 37 on the bases of two converging walls 34 of the housing. The outer edge of the panel forms a continuation of the cover peripheral channel 23. An electric light socket 45 projects through an aperture in the housing 29 and has a switch 48. The electric cable to the socket 45 passes through a cut-out in the housing. The reflector 54 is mounted on the inside of the roof of the housing and is spaced therefrom. The cover is a thermoplastic moulding.
Patent GB-418048-A (GB)
Title: An improved process for the production of charcoal
IPC: C10B53/02
Filed: 1933-10-31
Abstract: A highly porous and hygroscopic carbon is obtained by heating in a limited amount of oxygen the waste, such as husks, dust or shells, of coffee beans, unmalted barley or rye.
Patent GB-960082-A (GB)
Title: Manufacture of porous sheet materials
Inventor: YARRISON WALTER WILLIAM
IPC: B32B27/00
Filed: 1962-08-07
Abstract: 960,082. Laminates and laminating. ROGERS CORPORATION. Aug. 7, 1962, No. 30232/62. Heading B5N. A laminated sheet is manufactured by spreading a uniform layer of a granular thermoplastic resin e.g. vinyl resins, polyethylene, natural and/or synthetic rubbers, acrylic resins, over a fibrous backing sheet 10 e.g. fibre board, resin and/or rubber impregnated fibre board, woven or non-woven fabrics, covering the layer with a similar sheet of resiliently compressible fibrous material 52 and passing the resultant assembly through heated plates 62, 64 which define a passageway of diminishing thickness therebetween so that they apply heat and pressure to sinter the resin granules into a microporous layer 14 which is firmly bonded to the backing sheet 10. The covering layer 52 may be withdrawn after the assembly has passed between cooling plates 74, and the backing layer may be spread, before applying the granular material, with a vapour-permeable or other adhesive e.g. polyacrylate-acrylic acid, polystyrene, P.V.C., vinyl acetate, applied in strips, dots or individual particles.
Patent GB-262425-A (GB)
Title: Improvements in or relating to means for stretching or drawing fibrous material
IPC: D01H5/26
Filed: 1926-11-30
Abstract: 262,425. Kuhl, L., and Hoffmann, F. Dec. 1, 1925, [Convention date]. Addition to 261,043. Rollers and roller heads.-In the arrangement described in the parent Specification wherein the slubbing is supported by an outwardly-curved band 20, which passes over a fixed or rotary support 28 mounted close to the front rollers 14, 15, and is driven by a roller 21 at the same speed as the slubbing and tensioned by a roller 22, a pressing roller 25 is mounted on the band and is adjustable so that it forms a gripping point spaced from the nip of the rollers 14, 15 a distance at least equal to the staple of the fibres.
Patent GB-805895-A (GB)
Title: Improvements in heel reinforcements for boots and shoes
Inventor: SOUTAR ARTHUR NEIL
IPC: A43C13/02
Filed: 1955-10-24
Abstract: 805,895. Shoe protectors. ODELL LEATHER CO., Ltd. Oct. 12, 1956 [Oct. 24, 1955], No. 30330/55. Class 17(3) A protector comprises an apertured plate 1 with an arcuate flange 2 to embrace the back and sides of the top piece. A transverse bar 6 has front and rear edges 9, 10 which are parallel over a major portion of their length and from one or each of which fixing formations 11 extend which are pressed into the material of the top piece. The protector may be in the form of a tip where the flange 2 only embraces part of the top piece edge.
Patent GB-334095-A (GB)
Title: Improvements in and relating to cinematograph projectors
IPC: G03B1/56
Filed: 1929-10-07
Abstract: 334,095. Couade, M. Oct. 17, 1928, [Convention date]. Kinematograph apparatus. -A projector is provided with a curved film slide having apertures 4 for the passage of feed claws and two resilient pressers 13, 14 comprising single strips with rounded ends for holding the film in contact with the slide. These pressers may, as shown, be formed of a single sheet having an opening for the passage of light or may consist of independent strips mounted above and below the lens. The bearing surfaces of the springs may be ribbed or roughened.