baber/WOPTO huggingface dataset:
Patent GB-1333391-A (GB)
Title: Holographic electromagnetic radiation filters
IPC: G02B5/32
Filed: 1971-06-15
Abstract: 1333391 Holography WESTERN ELECTRIC CO Inc 15 June 1971 [16 June 1970] 27928/71 Heading G2J [Also in Division H1] A radiation filter comprises a thick transmission hologram 18 having a reflective backing 21 which reflects back to the hologram both transmitted and diffracted light. The hologram, which may be of the phase-type, comprises variations in transmittance or in optical path length and contours of maximum (or minimum) transmittance or optical path length are so orientated with respect to back 21 that incident radiation transmitted by the hologram is reflected back to the hologram in a direction parallel to radiation diffracted by the hologram once before and once after incidence on the reflective back 21. The phase hologram may have a diffraction efficiency of 50%. The contours of maximum (or minimum) optical path length are planes and are substantially perpendicular to backing 21. The filter acts as a reflection narrow band filter, e.g. as a wavelength selector in a spectrometer or monochrometor. One particular use is as a wavelength selector in a dye laser. The cavity is defined by spherical mirror 457 and filter 411 comprising thick transmission hologram and reflective backing. The filter is rotatable by means 441. A cell 455 through which the dye flows is located in the cavity. Optical pumping of the dye is by a laser beam 451 and cylindrical lens 453. The filter 411 confines the output to a band width of 0À5Š. Rotation of filter 411 changes the output. To reduce radiation losses filter 411 can be inserted in cell 455, the variation in angle of incidence being by using acoustic-optic or electro-optic means.
Patent GB-519647-A (GB)
Title: Improvements in or relating to variable electrical inductances
IPC: H04B1/03
Filed: 1938-09-26
Abstract: 519,647. Electric collectors. MACLARTY, B. N. Sept. 26, 1938, No. 28049. Addition to 516,814. [Class 38 (i)] A contact brush for a variable inductance comprises a number of L-shaped copper laminae 4 having rounded knife-edges 5 at their points of contact with the conductor 1, all pivoted on a shaft 6 extending across the brush box 3, and each having a blade spring 11 bearing against a pin 13 so as to be independently urged into contact with the conductor. Specifications 504,014 and 515,688 are referred to.
Patent GB-849974-A (GB)
Title: Improvements relating to the preparation of semi-conductor materials
Inventor: BILLIG ERNST
IPC: H01L21/223
Filed: 1956-09-14
Abstract: 849,974. Forming PN junctions. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Sept. 6, 1957 [Sept. 14, 1956], No. 28160/56. Class 37 An activator in gaseous form is applied to the molten surface of a semi-conductor which is subsequently allowed to solidify and then heattreated to ensure diffusion of the activator to the desired depth. Semi-conductor materials mentioned are germanium, silicon and silicon carbide. The activators may be gases including elements of Group III and V such as boron, aluminium, gallium and indium or nitrogen, phosphorus, arsenic and antimony. Specific gases mentioned are B 5 H  9 , H 3 A 5  and H 3 P. The gas may be applied to the semi-conductor during a zone melting process resembling that described in Specification 843,266 or during the melting of the surface of a wafer by radiant heat or electron bombardment as described in Specification 840,426 or during the drawing of a crystal from a melt.
Patent GB-359151-A (GB)
Title: Improvements in and relating to methods of and means for ventilating enclosures
IPC: F24F11/00
Filed: 1930-09-20
Abstract: 359,151. Ventilating enclosures. CARRIER ENGINEERING CO., Ltd. and JONES, J. S., 24, Buckingham Gate, London. Sept. 20, 1930, No. 28162. [Class 137.] Ventilating means for an enclosure comprises a supply duct, dual distribution conduits leading to upper and lower parts of the enclosure and means for controlling the dual conduits whereby distribution may take place through the upper conduit (when cold air is supplied), or through the lower conduit (when warm air is supplied). A supply duct, Fig. 1, branches into two conduits 4, 5 leading to the top and bottom of the enclosure 6 and provided with connected dampers 7, 8 operated by a thermostat 11 in the enclosure through an air lever motor 10, whereby the incoming air is supplied to the top or bottom of the room according to whether it is colder or warmer than the air in the enclosure. A thermostat 12 controls the temperature of the incoming air by means of a heater 13. In a modification a single thermostat controls both the heater and the dampers. A byepass conduit 22 and a damper 23 enable an updraught of cold air to be obtained if required. In the form shown in Fig. 3, the enclosure is served by two ducts, 1, 1a, each of which is connected by branches 2, 3 and 2a, 3a to each of the upper and lower conduits 4, 5. Thermostatically operated dampers 7, 8 and 7a, 8a are provided in these branches. The duct la includes a heater 13 with a byepass 20, and is connected to the duct 1 by a suction duct 16a leading to a fan 16 in the duct 1. When the enclosure is being warmed, the fan supplies air through the cross branch 3 to the lower conduit 5 and draws air from the upper regions by way of conduits 4, 3a, heater 13 and duct 16a. Fresh air from a conditioning plant 19 may be drawn into the duct 16a to mix with the recirculation air when rapid heating is not required. When cooling is necessary branches 3, 3a are closed and a mixture of fresh and recirculation air is supplied at the top by way of duct 2 and withdrawn at the bottom. An additional damper 8b in the branch 3a permits the upward circulation of fresh air without recirculation when the dampers 7, 7a are closed, relief dampers for exhaust to atmosphere being provided in the enclosure. In a modified form as applied to a unit apparatus, Figs. 4 and 5, air is supplied to the unit 24 from a duct 25 and issues from upper and lower outlets 29, 28 according to the position of a damper 27.
Patent GB-837374-A (GB)
Title: Improved shoe lace
Inventor: PRECHTL ADOLF
IPC: A43C1/02
Filed: 1958-09-03
Abstract: 837,374. Laces. SIEGRIST, W. Sept. 3, 1958, No. 28278/58. Class 43 An elastic shoe lace comprises a loop having a button 2 joining the two ends and a cotterlike peg 3 on the loop forming the other end of the lace. The lace may be enclosed in an extensible sheath, and the peg may rotate on the lace. The button and peg retain the ends of the lace in the eyelets of the shoe.
Patent GB-427475-A (GB)
Title: Improvements relating to rotary compressors, engines and heating and cooling apparatus
IPC: F01C1/107
Filed: 1933-10-13
Abstract: 427,475. Making rotary engines and pumps. CAPPS, A. W., Fairbourne, Clatterfield Gardens, Westcliff-on-Sea. Oct. 13, 1933, Nos. 28281 and 28678. [Class 83 (ii)] [See also Group XXVI] In a rotary engine or pump of the internallymeshing-screw type, the threads are in the form of epi-cycloidal and hypo-cycloidal curves. The Figure shows the invention as an internal-combustion engine, or being reversed and modified, the apparatus may act as a compressor. The core 20 may be made : (a) by screwing together short sections of constant pitch, but each section progressively changing in its pitch ; (b) by milling with an attachment fixed on the slide-rest of a lathe ; (c) by expanding a tube hydraulically or by forging. The tube 28 may be made by inserting a finished core 20 within a split tube and filling in with wax or plaster. The split tube is removed and metal is deposited electrically or by spraying, on the wax. After machining the exterior, circular plates, for cooling fins, are fitted and the wax dissolved out. Reference has been directed by the Comptroller to U.S.A. Specification 1,892,217.
Patent GB-282539-A (GB)
Title: Improvements in and relating to the manufacture of cathodes for thermionic valves
IPC: H01J1/14
Filed: 1926-11-10
Abstract: 282,539. General Electric Co., Ltd., (Just, A.). Nov. 10, 1926. Vacuum tubes.-A thermionic cathode consists of a metallic core, for instance of tungsten, molybdenum, nickel, platinum or an alloy, permeated or coated with a mixture of oxides, the proportions of the oxides being about 1000: 1. The main constituent of the mixture may be an alkaline earth metal oxide, and the other constituent a small amount of the oxide of another alkaline earth metal, chromium or uranium or of a rare earth metal such as thorium, neodymium, praseodymium or samarium; or lanthanum oxide may be mixed with a small amount of an oxide of rare earth metal. Finely-divided molybdenum may be mixed with up to 3 per cent of the oxide mixture, and worked into wire by the usual methods. The oxides may be obtained from the corresponding azides.
Patent GB-1427540-A (GB)
Title: Devices for prevapourising liquid fuel
IPC: F23R3/32
Filed: 1973-06-14
Abstract: 1427540 Gas turbine engine combustion equipment SOC NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION 14 June 1973 [23 June 1972] 28308/73 Heading F1L [Also in Division F4] The invention relates to combustion apparatus of the vaporizing type for an engine such as a gas turbine engine, the invention being described with reference to a combustion apparatus comprising an outer annular casing in which is disposed an annular flame tube, a series of fuel vaporizing devices projecting into the flame tube. Each vaporizing device is of hollow T-form and comprises a hollow body portion 112 having a pair of transverse hollow arms 113X, 114X each arm terminating in an outlet portion 113Y, 114Y directed upstream parallel to the body portion. The upstream end 112X of the body portion is open for inflow of air under pressure A 1  and a fuel injection device 117 projects into the body portion for supply of fuel as indicated at C, the fuel being vaporized and a mixture of vaporized fuel and air A.C. discharging from the outlet portions 113Y, 114Y. A wall T is disposed around the body portion 112 and the arms 113X, 114X also around the outlet portions 113Y, 114Y so as to define a passage K2 through which a fraction of air A 2  flows. Openings 126 are formed in the wall T in the region of the arms and a fraction of the air discharges through the openings. Also a series of fins or vanes 125 are disposed in the passage K2 in the region of the arms 113X, 114X to assist heat transfer. A further hollow member 118 is disposed around the wall T, in the region of the inlet portion and defines therewith a passage 119 for a flow of cooling air a which discharges through outlet 119Y. The object of the invention is to prevent overheating of the vaporizer should the flow of fuel from the injector 117 be reduced or cease.
Patent GB-710377-A (GB)
Title: Method and apparatus for the destructive distillation of oil shale
IPC: C10G1/02
Filed: 1951-12-03
Abstract: 710,377. Distilling shale. DALIN, D. Dec. 3, 1951 [Dec. 4, 1950], No. 28333/51. Class 55 (1) In a process of distilling shale the shale is fed successively through a preheating zone, a distillation zone and a combustion zone which is isolated from the distillation zone but is in indirect heat exchange therewith, the gases and vapours from the distillation zone being fed into a lower portion of the preheating zone to preheat the shale and to condense a portion of the distillation gases and vapours. As shown in Fig. 1 raw shale is fed into a preheating zone 18 which has flues for waste combustion gases from the combustion zone arranged on either side of a column of the raw shale and which pass directly through the raw shale at the upper end of the column passing to a conduit 24. Preheated shale is fed by a device 34 into a distillation zone 7 arranged centrally of the combustion zone which is fed with spent shale from the distillation zone. Heated distillation gas is circulated by a blower 42 and distilled gases and vapours and circulating gas pass into the preheater 18 at 31, condensate being removed from a collecting trough 30 and uncondensed gases and vapours leave by an outlet 36. The gas to be recirculated is heated in a heat exchanger arranged in the flues of the preheater. Spent shale is elevated to hoppers 13 by an elevator 12 where combustion air is admitted. The walls of the distillation zone are provided with coils in which steam may be generated and similar coils may be provided in the bed of burning spent shale and adjacent the column of shale in the preheater to control the temperature therein.
Patent GB-925401-A (GB)
Title: High-voltage circuit-breaker
IPC: B61D3/02
Filed: 1959-08-19
Abstract: 925,401. High-voltage switches; switch contacts. FABRIEK VAN ELECTRISCHE APPARATEN VOORHEEN F. HAZEMEIJER & CO. N.V. Aug. 19, 1959 [Aug. 27, 1958], No. 28353/59. Class 38 (5). [Also in Group XXXVI] A switch comprises a fixed contact assembly 3, 4, a movable contact rod 17, a movable contact sleeve 12 and a fixed insulating tube 5 which is between the rod and the sleeve when the circuit-breaker is closed, the arrangement being such that the sleeve 12 separates first from the fixed contact assembly when the switch is opened and engages first. with the fixed contact assembly when the switch is closed. In the double-break arrangement shown, an insulating hood 10 carries two interconnected sleeves 12 and a U- shaped conducting member 16 which provides the contact rods 17 and together with an armature 13 is movable in slots in the sleeves. The armature 13 co-operates with a permanent magnet assembly 7, 9 disposed between the breaks. To close the switch the hook 10 is pushed on to the insulating member 6 surrounding the fixed contact assemblies so that each sleeve 12 engages a fixed contact 4, Fig. 1. On the further movement of the hood 10, a stirrup 15 pushes the armature 13 down so as to bring the rods 17 into engagement with the fixed contacts 3. Springs 18 are then stressed to provide contact pressure as the armature 13 is brought into engagement with the permanent magnet assembly, Fig. 2. To open the switch, the hood is pulled up so separating the contact sleeves 12 from the contacts 4, Fig. 3. As the armature 13 is held by the assembly 7, 9, the contact rods 17 do not move until the ends of the slots in the sleeves 12 abut the armature and lift it away from the assembly 7, 9. The rods 17 then separate rapidly from the contacts 3 under the force of springs 14 which have been stressed by the movement of the sleeves 12 relative to the armature .13. Reference is made to a single-break switch. Specification 779,103 and U.S.A. Specification 2,455,998 are referred to.
Patent GB-616933-A (GB)
Title: Improvements in or relating to control gear for auxiliary drives on motor vehicles
IPC: B60K26/04
Filed: 1946-09-23
Abstract: 616,933. Controlling gear on motor vehicles. SHELVOKE & DREWRY, Ltd., and EDWARDS, C. K. Sept. 23, 1946, No. 28456. [Class 79 (v)] On a motor vehicle an auxiliary drive can be operatively connected to and disconnected from the main drive by a lever connected to the throttle operating mechanism by a lost-motion connection allowing the throttle to be freely operated when the lever is in the disengaged position, but which restricts the free movement of the throttle outside predetermined limits when the lever is in the engaged position. The engine throttle 10 is connected by linkage 12 to an accelerator pedal (not shown), and the hand control lever 14 pivoted at 20 has a pin 26 in a slot 24 on a link 22 connected to the linkage 12 and the engine throttle. The lever 14 controls through a linkage 16 a pump (not shown) which may, for example, operate a tipping gear. Engaging with the tail 28 of the lever 14 is an adjustable screw 38 on a lever 30 pivoted at 32, the screw and lever being urged towards the tail 28 by a spring 34. The head of the lever 30 engages a projection 36 on a rod 22. The projection 36 may be adjustable in position to vary the throttle opening. If the drive control is moved from the disengaged position (shown in full lines) to that of the engaged position (shown in dotted lines), the pump will be connected to the main drive and the throttle opened a predetermined amount by the lever 14. Any substantial further opening of the throttle urges the lever 14 to return to its original disengaged position by the pin 26 impinging on the end of the slot 24. Substantial closing of the throttle returns the lever 30, and therefore the lever 14, to its original disengaged position.
Patent GB-391119-A (GB)
Title: Improvements in or relating to the preparation and operation of platinum plating baths
IPC: C01G55/00
Filed: 1931-10-14
Abstract: A solution obtained by boiling an alkali metal hydroxide, sodium and potassium hydroxides being specified, and a compound of tetravalent platinum such as sodium chloroplatinate is treat d with ethyl alcohol, acetone or other organic liquid which is completely or almost completely miscible with water, whereby a hydrated alkali metal platinate is precipitated.  The precipitate is washed and dried and dissolved in an alkaline solution to form an electroplating bath.
Patent GB-386380-A (GB)
Title: Improvements in thimble measures for liquids
IPC: G01F19/00
Filed: 1932-06-08
Abstract: 386,380. Funnels for liquids. ROLPH, W. M., 1, Dover Street, London. June 8, 1932, No. 28655/31. [Class 125 (ii).] Thimble-measures 1 of different sizes can be detachably secured to a base member 2 in which is pivoted an operating lever 6 for a valve 3, the lever extending adjacent the side of the measure so that the valve is opened by pressing the lever towards the side. The measure is internally threaded at 8 to receive the base member, and the lever 6, pivoted at 7, is slotted to embrace a screw 4 threaded into the valve stem and passes through a slot 10 in the wall of the base member. A spring 5 presses the lever downwardly so as to keep the valve 3 normally closed.
Patent GB-392436-A (GB)
Title: Improvements in and relating to electric oscillation generators
IPC: H03B5/34
Filed: 1932-10-15
Abstract: 392,436. Valve generating circuits. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Meahl, H. R. ; 2, Biglow Avenue, Schenectady, New York, U.S.A.) Oct. 15, 1932, No. 28847. Convention date, Oct. 15, 1931. [Class 40 (v).] To obtain stable working in a crystal-controlled high frequency oscillator the anode of the valve 1, Fig. 1, is coupled to the tuned grid circuit 5, 6 in reversed phase by the coil 8 in such a manner that oscillations could not occur without the inclusion of the piezo-electric crystal 4 in the grid circuit. By this means greatly increased stability results, the anode voltages may be higher and oscillations are independent of the anode-grid capacity which may be eliminated by using a screen-grid valve. The grid circuit 5, 6 is preferably tuned to a frequency of from one quarter to three-quarters of the crystal frequency. A resistance may be provided to match the external anode circuit impedance to the valve impedance and may be varied by connection from condenser 15, Fig. 2. The crystal may be connected between the tuned circuit 5, 6 and the cathode.
Patent GB-841576-A (GB)
Title: Process for manufacture of sintered bodies
Inventor: AGTE CURT
IPC: C04B35/71
Filed: 1956-09-24
Abstract: Shaped bodies formed of 1-80% of powdered alumina mixed with 20-90% of powdered carbides with or without up to 10% of metals, are packed in a powder of an oxide or oxides having a melting point over 1500 DEG C., such as alumina, and sintered.  The sintering operation is preferably carried out in an inert or reducing atmosphere.
Patent GB-677215-A (GB)
Title: Improvements in increasing the mechanical stability of formaldehyde-preserved natural rubber latex
IPC: C08L7/02
Filed: 1950-11-29
Abstract: 677,215. Stabilizing latex. UNITED STATES RUBBER CO. Nov. 29,1950 [Feb. 2, 1950], No. 29218/50. Class 70 The mechanical stability of formaldehyde-preserved natural rubber latex is increased by incorporating therein from 0.01 to 0.2 per cent of its weight of methyl cellulose. The latex may contain from 0.03 to 1.0 per cent of formaldehyde and/or from 0.1 to 1.0 per cent of a volatile saturated secondary or tertiary amine, e.g. dimethylamine, trimethylamine, diethylamine, triethylamine or morpholine. Specification 368,193 is referred to.
Patent GB-1363600-A (GB)
Title: Direct-positive silver halide emulsions containing boron hydrides and gold compounds
IPC: G03C1/485
Filed: 1972-06-22
Abstract: 1363600 Photographic direct positive silver halide emulsions containing boron hydrides E I DU PONT DE NEMOURS & CO 22 June 1972 [22 June 1971] 29281/72 Addition to 1308753 Heading G2C A direct-positive, water-permeable colloid silver halide emulsion contains a fogging amount of a boron hydride which is of the series B 6 H 6 <SP>-2</SP> to B 12  H 12 <SP>-2</SP> or is a polyhedral azaborane, polyhedral thiaborane or polyhedral carborane and a gold compound. The silver halide may be silver chlorobromide or silver iodobromochloride. The boron compound may be (NH 4 ) 2  B 10 H 10 , CsB 9 H 12 S, (CH 3 ) 3  NNB 9 H 12 , (CH 3 ) 4 N(CH 3 ) 2 NNB 9 H 12 , [(C 6 H 5 ) 3 CH 3 P] 2  B 11 H 11 , B 10 H 10  CNH 3 , (CH 3 ) 4  N (CH 3 ) 3  CNHC B 10 H 12 , (CH 3 ) 3  NH B 10 H 12  CH, B 10 H 12  [S(CH 3 ) 2 ] 2 , B 9 H 13  S( 2 CH 5 ) 2 , B 10 H 12 [S(C 2 H 5 ) 2 ] 2 , C 6 H 5 B 11  H 10 S, Na 2  B 12  H 12 .2H 2  o, B 10  C 2  H 12 , C s (CH 3 ) 4  NB 11 H 11 , Cs 2  B 6 H 6  or Cs B 9 H 9 CH. The gold compound may be HAu Cl 4 , K Au Cl 4 , KAuBr 4  or K Au (SCN) 4 . The boron and gold compounds should preferably be added at the beginning, during or before the end of digestion after excess salts have been removed by washing.
Patent GB-798052-A (GB)
Title: Looper control for sewing machines
IPC: D05B57/02
Filed: 1956-09-25
Abstract: 798,052. Sewing machines. SOC. PER AZIONI VIRGINIO RIMOLDI & C. Sept. 25, 1956 [Oct. 13, 1955], No..29299/56. Class 112 In a sewing machine comprising a needle reciprocating over a rectilinear path 16 extending trhough a work-supporting plate 15, a looper 1 is secured to one end of a rod 2 of which the other end is moved over an arcuate path, and the rod is mounted for longitudinal movement in a guideway 9 pivoted about an axis 9a which is perpendicular to and intersects the axis of the rod. A lever 4, fulcrummed at 5, is pivoted at 3 to the rod and has a ball and socket connection 6 with a connecting rod 7 driven by a crankshaft 8. The arrangement is such that the looper tip travels along a first portion 17 of large radius, the chord 18 of which is at an angle of 17 degrees to the needle path, and along a second portion 20 of smaller radius and extending through the needle path, the centre 21 of portion 20 being slightly below plate 15 and on the side remote from the needle path.
Patent GB-1077976-A (GB)
Title: Rigid polyvinylchloride foam
Inventor: SUDAKOV VASILY NICKOLAEVICH
IPC: C08J9/00
Filed: 1964-07-17
Abstract: Foaming PVC compositions comprise PVC, methyl methacrylate, a blowing agent, an initiating agent, and chlorinated PVC.  The chlorinated PVC may be 25% by weight of the PVC component.  The specified blowing agent is ammonium carbonate and the initiating agent dinitrylazoisobutyric acid.  Dyes and fillers may be included.