baber/WOPTO huggingface dataset:
Patent GB-1210998-A (GB)
Title: Improvements in or relating to the production of polyimides
Inventor: BEHR ERICH
IPC: C08G73/10
Filed: 1969-07-03
Abstract: 1,210,998. Polyimides. DYNAMIT NOBEL A.G. 3 July, 1969 [4 July, 1968], No. 33670/69. Heading C3R. A polyimide containing recurring structural unit (A) is made by reacting a dicarboxylic acid diazide (B) with a tetracarboxylic acid dianhydride (C) at 0-300 C R and R<SP>1</SP> are each aliphatic, aromatic, cycloaliphatic, or heterocyclic groups which may be substituted, or two or more of such groups linked through the groups -CO-, -O- =N-, -SO 2 - or -COO-. Many compounds (B) and (C) are listed. The reaction may be carried out in the presence or absence of an inert solvent, e.g. a high-boiling petroleum fraction, toluene, xylene, tetralin, decalin, odichlorobenzene, diphenyl ether, dioxan, N- methyl pyrrolidone, dimethyl formamide, dimethyl acetamide, methyl benzoate, dimethyl sulphoxide, or tetramethylsulphone. The solvent can subsequently be removed to yield films, foils, coatings, or impregnations. In examples (B) is iso- or tere-phthalic acid diazide and (C) is pyromellitic acid anhydride, which react in o-dichlorobenzene at 90-100 C. with subsequent refluxing. On cooling the polyimide is filtered off, purified with methanol, and vacuum dried.
Patent GB-860523-A (GB)
Title: A mounting for vehicle spot lamps
Inventor: COWELL DENNIS WILLIAM
IPC: B60Q1/24
Filed: 1958-10-22
Abstract: 860,523. Vehicle lamp mountings. BUTLERS Ltd. Oct. 15, 1959 [Oct. 22, 1958], No. 33725/58. Class 75 (3). [Also in Group XXV]. A vehicle spot lamp mounting comprises a bracket b for attachment to the vehicle and having a ball c secured or formed thereon, a socket e for attachment to the lamp, and a spring-loaded two-part clamp contained in the socket and operated manually by a cam i located between the parts f, g of the clamp which abut the ball and the spring h respectively. The socket is constructed from two similar halves, and the spring preferably consists of a pad of rubber.
Patent GB-847204-A (GB)
Title: Improved dynamo-electric machine and method of making dynamo-electric machines
IPC: H02K15/16
Filed: 1958-10-22
Abstract: 847,204. Making dynamo-electric machines; seaming. GENERAL MOTORS CORPORATION. Oct. 22, 1958 [Nov. 5, 1957], No. 33755/58. Classes 83 (2) and 83 (4). [Also in Groups XXXIV and XXXV] An open-ended sheet metal cylindrical body 14 bent to shape in a tin can-making machine and two sheet metal end caps 12 forming a dynamo-electric machine casing are secured together, simultaneously in the Fig. 6 embodiment shown, by bending channel-shaped edges 71 of the end caps over outwardly bent ends 70 of the body by means of rollers 86 movable radially of the machine; the end caps are supported in plates 80, 94, either the plates or rollers are rotated, and the rollers are moved radially inwardly to form the rolled seam 90 shown in Fig. 6a. In another embodiment, not shown, one end cap is thus joined to the body, the motor internal parts are assembled therein, and then the other end cap is joined to the body. In Fig. 6b is shown a modified seal wherein the body and cap edge have interlocking beads 100, 102 respectively which permit removal of the end cap.
Patent GB-887522-A (GB)
Title: Improvements in or relating to magnetic blow out electrical circuit-breakers
IPC: H01H9/34
Filed: 1958-10-22
Abstract: 887,522. Gas-blast switches; arc-rupturing in switches. ETABLISSEMENTS MERLIN & GERIN. Oct. 22, 1958 [Nov. 5, 1957], No. 33763/58. Class 38 (5).  A magnetic blow-out circuit-breaker comprises an arc extinction chamber 1 similar to that described in Specification 702,834, and which connects with an arc formation chamber 4, completely closed by arc runners 5, 6, and insulating walls 7, 8, 9. One end of a movable contact 10 passes through an aperture in the chamber 4 to engage a spring-controlled semi-movable contact 12, this aperture being closed by contact 12 when contact 10 is opened. In the arrangement shown, a piston 21 injects a blast of compressed air through the hollow contact 10 and out of an orifice 23 into the chamber 4, to assist the blow-out device in driving the arc towards the extinction chamber 1. In Fig. 1 (not shown) no air-blast is provided and in Fig. 5 (not shown) main current-carrying contacts are arranged outside the chambers. The walls of the arc formation chamber may be partially or wholly made of material which generates gas under the thermal effects of the arc.
Patent GB-354647-A (GB)
Title: Safety arrangement for doors of dwellings
IPC: E05C17/36
Filed: 1930-11-10
Abstract: 354,647. Door chains ; fastenings. SAMSON, M., 18, Hopfenmarkt, Hamburg, Germany. Nov. 10, 1930, No. 33785. [Class 44.] A door chain d terminates in a rigid member c which engages over a lock pin wand is secured by a shackle q. The shackle is released by a non- rotating key which enters a recess m and disengages tumblers u from a projection t to allow the shackle to be shot upwards under the action of a spring x. The screws securing the lock to the door jamb are covered by a plate k, Fig. 5, with pins s<1>, s<2> which engage in casing slots r<1>, r<2> and are locked by the arms of the shackle. The back of the lock casing is extended at l<1>, l<2> to form a key guide and a wall protection and the member c may be covered with rubber to prevent damage to the door. The chain and the lock may be connected to an alarm. Operation from outside the door is effected by opening the door a few inches and inserting the hand to operate the lock.
Patent GB-1013658-A (GB)
Title: Improvements in childrens desks
IPC: A63B21/055
Filed: 1964-08-19
Abstract: 1,013,658. Furniture combinations. B. JORDAN and P. TRAYNOR. Aug. 19, 1964, No. 33851/64. Heading A4H. [Also in Division A6] An exercising apparatus for physically handicapped children and others takes the form of a child's desk having spring biased treadles 4 suspended from a cross-bar 2, and similarly biased hand levers 8 pivoted from the base at points 9 each side of the frame 1. The desk top 14 may be adjustably supported in height in tubes 17 provided with clamping screws 18. Loops 19 are provided for connection to a chair on which a patient may be seated.
Patent GB-1427815-A (GB)
Title: End stop means for sliding clasp fasteners
IPC: A44B19/36
Filed: 1973-07-17
Abstract: 1427815 End stops for sliding clasp fasteners YOSHIDA KOGYO KK 17 July 1973 [18 July 1972] 34028/73 Heading E2S A sliding clasp fastener 10 of the continuous plastics filament type includes a top stop 15 comprising a pair of plastics slugs 16, 16 secured to respective stringer tapes 11, 11 adjacent beaded edges 12 thereof, each of the slugs having an edge 16a substantially parallel to the beaded edge, a cam surface 16c arranged to abut the upper flange end of a slider 14, each slug embracing a group of fastener elements of which an element or elements located opposite to the cam surface have their coupling heads 13a retained and disengaged from the corresponding ones on the mating stringer tape, the coupling heads of the remaining elements in the group being removed at locations in registry with an extremity of the beaded edge of the tape. In a modification, Figs. 5 and 6 (not shown) each of the slugs is re-inforced with a foil member, integral with the slug and bonded to the stringer tape.
Patent GB-1173727-A (GB)
Title: Light Modulating Apparatus
IPC: H01S3/107
Filed: 1968-07-17
Abstract: 1,173,727. Lasers; electron beam apparatus. INTERNATIONAL BUSINESS MACHINES CORP. 17 July, 1968 [18 Sept., 1967], No. 34104/68. Headings H1C and H1D. In a laser in which light emitted from an active medium 10 is focused by lens L1, L2 on to small resonator mirrors M1, M2, an electro optic crystal 13 located within the resonator is scanned by an electron beam for the purpose of establishing localized changes of the index of refraction and therefore the generation of side order modes which escape out of the resonator past mirror M1. The electron beam is produced by an electron gun 17 and passes through an aperture 11A in an intermediate resonator mirror 11, deflection and intensity of the beam being controlled respectively by deflection yokes 18 and a grid (not shown). The electro optic crystal 13 may be formed of lithium niobate, lithium tantalate or KDP or ADP, an electrically conducting and also transparent coating being formed on the surface remote from the electron beam. A transparent protective layer such as a layer of silicon oxide may be applied to the opposite surface. With suitable signals, such as television signals, applied to the deflection yokes and grid, persistent charges are established on the surface of the electro optic crystal which cause local changes of index of refraction, and therefore of phase, for light passing through the crystal. Side order modes are therefore produced, and since zero order modes only are reflected by the non-transmitting mirror M1 which is centred on a projection lens L3, the side order modes establish an image on a screen S corresponding to the television signals received. The localized changes of index of refraction established in the crystal persist for up to half an hour, depending on the temperature. Each pattern of charges established may be removed by erasing the charges with a flood beam from an appropriate potential.
Patent GB-837309-A (GB)
Title: Improvements in or relating to gas-turbine engines
Inventor: HAWORTH LIONEL
IPC: F02C3/06
Filed: 1956-11-08
Abstract: 837,309. Gas-turbine plant. ROLLSROYCE Ltd. Oct. 28, 1957 [Nov. 8, 1956], No. 34217/66. Class 110 (3). [Also in Groups XXIV and XXIX] A gas-turbine engine comprising a turbine and a coaxial driven member interconnected by a driving shaft has a tube or the equivalent located within and connected at spaced locations to the shaft, one location being in the region of the load and another location being in the region of the turbine rotor, the tube or equivalent being fed with a fluid under pressure so as to provide a pressurized chamber which is connected to pressure responsive means controlling the fuel supply, the arrangement being such that when the driving shaft fractures, the tube or equivalent also fractures resulting in reduction of pressure on the pressure-responsive means and so reducing the engine fuel supply. An axial flow compressor 10a, 10b supplies combustion air to combustion equipment 11 feeding a turbine 13b driving the compressor through a hollow driving shaft 14. Fuel is supplied to the injector nozzles 12 by a swashplate pump 15 the delivery of which is controlled by a unit 16. The angle of the swashplate is controlled by a piston 21 the position of which determined by the amount of leak-off from the chamber 23. The control unit 16 comprises a flexible diaphragm 29 carrying a lever 30 loaded by an evacuated capsule 35 responsive to changes in atmospheric pressure, and a piston 33 acted upon by the pump delivery pressure and a spring 31. The lever 30 carries a valve element 28 which opens or closes the end of the vent pipe 27 so that an increase of atmospheric pressure or a decrease of pump delivery pressure will cause an increase in the fuel delivery from the pump and vice versa. A lubricating oil pump 37 delivers oil through a pipe 38 and muff 39 to a tube 40 supplying oil to the engine bearings. The tube 40 is connected to the rotor system by splines 41, 42. A constriction 45 in the tube 40 forms a chamber 46 having a restricted oil inlet. The wall of the chamber 46 is provided with a shear neck in the form of a helical groove 47. The chamber 46 is connected by ducting 48 to a chamber 53 having one wall formed by a flexible diaphragm 51. The diaphragm 51 carries a leak-off valve 59 which is urged to the open position by a spring 56 and to the closed position by the pressure in the chamber 53. In the event of failure of the driving shaft 14, the tube 40 will be quickly fractured in the region of the shear neck 47. The pressure in the chambers 46 and 53 falls and the spring 56 opens the valve 59 which causes the delivery of the pump 15 to be reduced rapidly. A deaerator 49 separates air from the lubricating oil. A flanged plug 65 which is rotatable relative to the tube 40 and the turbine casing forms a connection between the ducting 48 and tube 40. The invention can be applied to a gas-turbine plant driving a propeller or to a compound gas-turbine engine.
Patent GB-1040659-A (GB)
Title: Vertical welding machine
IPC: B23K9/02
Filed: 1964-08-21
Abstract: 1,040,659. Welding by fusion. SOUDURE ELECTRIQUE AUTOGENE PROCEDES ARCOS. Aug. 21, 1964 [Sept. 4, 1963], No. 34236/64. Heading B3R. The welding head of an automatic vertical welding machine, e.g. electroslag or electrogas, is mounted so as to be pivotable about a vertical axis to enable the machine to be used for joints between plates in the same plane, corner joints between plates at an angle to each other or T- joints. Flat or angled melt retaining shoes are fitted as required and provision is made for oscillating the electrode across the joint. The welding head including electrode feed mechanism 51, Figs. 1 and 3 (not shown), and a contact and guide tube 59 is mounted on an oscillating platform supported on a carrier 38 attached by a vertical pivot 37 to a carriage 31 drivable up upright columns 20, 21. A control panel is mounted on the carriage 31. An inner shoe 72 is pivoted to links 68 pivoted to the frame 44 of the carrier 38. A blade 78 passing through the weld gap is similarly connected to the frame 44 and supports an outer shoe 88 with the interposition of vertical and horizontal pivots 85, 83. In a modification, Figs. 4, 6 (not shown), the electrode feed mechanism 51 is mounted on a frame 114 reciprocable on rails 115, 116, in such a way as to be adjustable about three mutually perpendicular pivots 100, 103 and 111. The frame 114 is reciprocated to oscillate the electrode with an adjustable dwell at the end of each traverse by a threaded drive rod 125 which during the traverse is connected by one of a pair of magnetic clutches 133 to oppositely driven bevel gears 131 and during the dwell period is braked. The clutches 133 and the brake are controlled by adjustable limit switches 148, 156 mounted on a common support 144. A plunger 157 acts as a sensing device engaging the inner shoe 72 to alter the position of the support 144 in accordance with deviations from the vertical of the plates being welded so that the electrode is oscillated within the limits of the weld gap. Both shoes 88, 72 are mounted on a vertical column 230 adjustable perpendicular to the weld by a handle 174, and pivoted so as to be movable in the plane of the weld with respect to the carrier 38. The shoes are of water-cooled copper construction. The outer shoe 88 is lockable by screws 243 in a selected position on a vertical pivot 238 on a bracket connected by links 235 to connected blades 78<SP>1</SP> secured to the column 230. A handle 245 is adjustable to pivot the links 235 to set the spacing of the shoes 72, 88. Cooling water and carbon dioxide is fed through tubes located between the blades 78<SP>1</SP> to the outer shoe 88.
Patent GB-813736-A (GB)
Title: Improvements in or relating to holders for sacks, bags and like containers
IPC: B65B39/08
Filed: 1957-11-02
Abstract: 813,736. Sack holders. LAVERICK, J. Nov. 2, 1957, No. 34253/57. Addition to 797,362. Class 58. The sack holder of the parent Specification is modified in that the pivoted and fixed jaws have opposed clamping faces at least one of -which is compressed when the jaws are closed. Preferably, the jaws are arranged so that, on being closed, compression begins at the lower edge of each compressible face. The actuating mechanism is mounted on the front wall 15 of a hopper h. Each side wall 24 of the outlet 20 of the hopper constitutes a fixed jaw having a substantially non-compressible surface. Each pivoted jaw comprises an arm 21 connected to the actuating mechanism and a diametrically opposed arm 26 fixed to a shaft 22 rotatably supported in the wall 15 and a lug 23. A channel-sectioned clamping member 27 holding a soft rubber pad 28 is secured to the arm 26. In the construction according to Fig. 3, (not shown), each pivoted jaw comprises two clamping members 27 holding soft rubber pads, which clamp the sack against hard rubber pads, preferably ribbed, attached to a strap encircling the outlet of the hopper.
Patent GB-173502-A (GB)
Title: Improvements in the manufacture of magnesia from dolomite
IPC: C01F5/22
Filed: 1921-12-20
Abstract: The Specification, as open to inspection under Sect. 91 (3) (a) describes a process of making magnesia from dolomite by the action of magnesium chloride solution on the hydroxides of calcium and magnesium obtained by calcination and hydration of the dolomite, in which the magnesium chloride solution is prepared as follows:-Ammoniacal liquor produced in the Solvay process after the sodium bicarbonate has been separated is treated with calcium or barium chloride to precipitate sulphates and carbonates, and heated with excess of either the initial lime-magnesia mixture, or pure magnesia previously obtained, to liberate the ammonia.  The solid residue of undissolved magnesia is filtered off, and the filtrate, containing calcium and magnesium chlorides, treated to obtain magnesia as described above.  This subject-matter does not appear in the Specification as accepted.ALSO:Relates to improvements in the process of making magnesia from dolomite by the action of magnesium chloride solution on the hydroxides of calcium and magnesium obtained by calcination and hydration of the dolomite.  Dolomite is ignited at 1000-1200 DEG  C., and the product slaked with an amount of water sufficient to hydrate only part of the lime, without hydrating the magnesia. Slaking in this way reduces the mixture of lime and magnesia to a fine powder, which is then sifted to remove unaffected nodules of siliceous material &c.  The sifted powder is introduced gradually into an excess of magnesium chloride solution, from which a granular, easily filtered, precipitate of magnesia readily forms, while calcium passes into solution.  To regenerate the magnesium chloride solution, calcium chloride solution, obtained by filtration of magnesia prepared as described above, is treated with the lime-magnesia mixture.  Carbon dioxide is passed into the solution, when calcium carbonate is precipitated, and magnesium chloride formed in solution.  The waste liquors from the recovery of ammonia in the Solvay ammonia-soda process, may be treated in the same way.  The Specification as open to inspection under Sect. 91 (3) (a) describes a third method of preparing magnesium chloride for use in the process.  The ammoniacal liquor produced in the Solvay process after the sodium bicarbonate has been separated may be treated with calcium or barium chloride to precipitate sulphates and carbonates, and heated with excess of either the initial lime-magnesia mixture, or pure magnesia previously obtained, to liberate the ammonia.  The solid residue of undissolved magnesia is filtered off, and the filtrate, containing calcium and magnesium chlorides, treated to obtain magnesia as described above.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1268672-A (GB)
Title: Thermoelectric devices
IPC: H01L35/06
Filed: 1969-07-08
Abstract: 1,268,672. Thermoelectric assemblies. SIEMENS A.G. 8 July, 1969 [9 July, 1968], No. 34337/69. Heading H1K. The hot and cold heat exchangers 1, 2 associated with elements 3 of a thermoelectric generator are spaced apart by thermal insulation (not shown). To allow for manufacturing variation in the length of the elements and to allow for differences in their rates of thermal expansion, flexible connectors 12 are provided in each thermoelectric limb. They are placed between two part-elements 4, 5 of different basic composition. As shown, the connectors consist of silver plates 13 soldered or welded to the elements and having silver plaits 14 soldered thereto, the plaits of adjacent elements being held together in a crimped-on sleeve 15. More than one plait may be attached to each element; a single plait may be attached to lugs on the plates 13 of each element, or be held in crimping bases attached to the silver plates, or be soldered to the plate 13 and grub-screwed to the adjacent plate 13; or the plates 13 may have lateral extensions which are bent towards those of adjacent units and seamed together. The hot end part-element 5 may be of germanium-silicon alloy and the cold end elements 4 of lead telluride or of co-alloyed bisnulth telluride and antimony telluride. The bridge 6 may be of molybdenum-silicon alloy. The bridge 6 may be attached to the heat exchanger 1 by hardenable ceramic 7 or, in variants, may be held by a shaped ceramic insulator, may be screwed to the heat exchanger 1, or may slide in a ceramic lined bore in the heat exchanger. At the cold end 2 interconnections or power take-offs 10 are silver plaits joined to lugs 9 or the end silver plates. The elements 4 are soldered to finned heat exchanger 2 using an intermediate metallized insulator 11 of alumina or beryllia.
Patent GB-884948-A (GB)
Title: Improvements in or relating to pipe joints
IPC: F16L19/02
Filed: 1959-10-10
Abstract: 884,948. Pipe joints. LANCASTER, F. Oct. 10, 1960 [Oct. 10, 1959 ; May 20, 1960], Nos. 34427/59 and 17802/60. Class 99(1). In a pipe joint union members 16, 30, Fig. 1, secured respectively to a wrought iron pipe 10 and a brass fitting 12 have co-operating convex and concave end faces 28, 38 between which a deformable insert 42 is compressed when the members are drawn together by a flanged nut 44 screwing on threads 36 on the member 30. As shown, the member 30 is provided with a plain cylindrical portion 40 which is a sliding fit with a plain cylindrical bore 50 formed in the nut. The insert 42 consists of a short polythene tube which is inserted in an annular recess 24 in the member 16. The member 16 is screwed in the pipe 10 and the member 30 is integral with the fitting 12; alternatively, connection is by brazing or soldering. In a modification Fig. 2, a lead pipe 60 is secured to a union member 66 by a wiped joint 69. Specification 740,717 is referred to.
Patent GB-1095685-A (GB)
Title: Dung remover for cattle sheds
IPC: A01K1/01
Filed: 1966-08-01
Abstract: 1,095,685. Cleaning cattle sheds. ALFA-LAVAL AKTIEBOLAG. Aug. 1, 1966 [March 22, 1965], No. 34441/66. Heading AIM. [Also in Division A4] A dung remover for cattle sheds comprises two divergent scrapers 1, 2 forming a V-shape to the apex of which is coupled traction means for moving the scrapers over the surface to be cleaned with their outer ends in advance of the apex. As shown the traction means comprises a cable 8 coupled to the scrapers by means of a lever 4, 6 the lever 4 being lowered when the device is moved in the direction A so that the scrapers are in scraping engagement with the shed floor. In the reverse direction lever 6 is pulled downwardly so that wheel 5 contacts the floor thereby raising the head of the device so that the scrapers trail over the floor. The scrapers are rigidly attached to each other and decrease in height from the centre to the outer edge. In a modification the scrapers are pivoted to a vertical pin so that in one direction of movement they form a V-shape and in the other direction they are closed together, being being provided to limit pivotal movement of the scrapers.