baber/WOPTO huggingface dataset:
Patent GB-1319175-A (GB)
Title: Saw-tooth wave generator
IPC: H03K4/50
Filed: 1971-07-27
Abstract: 1319175 Sawtooth generators IWATSU ELECTRIC CO Ltd 27 July 1971 [28 July 1970] 35181/71 Heading H3T In a sawtooth generator having a capacitor 4 charged by a current source 5 and discharged via a diode 2, distortion of the beginning of the sawtooth wave (Fig. 2, not shown) due to charge in diode 2 discharging into capacitor 6 is avoided by a further diode 10 in series with a voltage source 11 absorbing said charge. In the absence of a pulse P both diodes are forward biased and each stores a charge, the diode 10 being arranged to store an equal charge to that of diode 2 although at a lower current so that both diodes have an equal stored charge versus time characteristic. The capacitor 5 may be part of a Miller integrator or a Bootstrap circuit. The voltage source 11 may be adjustable (Fig. 8, not shown), to control the charge on diode 10.
Patent GB-391073-A (GB)
Title: Process for the manufacture of terpenes
IPC: C07C5/29
Filed: 1932-12-13
Abstract: The catalytic conversion of nopinene into pinene and camphene or of pinene into camphene is carried out by means of water-soluble neutral metal salts of sulphuric acid which retain one molecule of water of crystallization up to 220 DEG  C.  The catalysts may be prepared by crystallization and drying at ordinary pressure or in vacuo.  They may be introduced into the heated liquid all at once or in portions and may also be used precipitated on inactive carriers.  The process may also be carried out by allowing the oily starting material at a temperature below its boiling-point to flow through a layer of catalyst, or by passing it over the catalyst at temperatures above its boiling-point, alone or in admixture with inert gases. Instead of nopinene and pinene, oils containing them may be used. In examples: (1) pinene is refluxed with MgSO4.H2O (obtained by heating Epsom salts to 125-150 DEG  C.) yielding camphene; the catalyst may be replaced by the corresponding sulphates of zinc, iron, cobalt, nickel or other heavy metals; (2) nickel sulphate dried at 125 DEG  C. is introduced into nopinene at 140 DEG  C.; (3) distilled oil of turpentine is refluxed with MgSO4.H2O (obtained by drying Epsom salts in vacuo at 110 DEG  C.); (4) pinene is passed with nitrogen through a tube filled with MgSO4.H2O at 170 DEG  C.; (5) oil of turpentine is allowed to flow through a layer of granulated NiSO4.H2O at 120-130 DEG  C.
Patent GB-1014844-A (GB)
Title: Improvements in or relating to baby carriages and push-chairs
Inventor: BUTTERS WILLIAM JAMES
IPC: B62B9/12
Filed: 1962-09-17
Abstract: 1,014,844. Collapsible push-chairs. BABYMATE Inc. Sept. 12, 1963 [Sept. 17, 1962], No. 35379/62. Heading B7B. A collapsible push-chair has a wheeled base 10 to which are pivoted tubes 30 to telescopically accommodate the U-shaped handle 68. The handle tubes 30 carry brackets 34 on which the seat supporting frame 20 is pivoted, the lower end of the frame 20 being pivotally connected at 26 to links 24 carried rotatably on the axle 14 so that the joint 26 may be " broken " rearwardly to collapse the pushchair. A spring-urged foot-operated pivoted catch 98 engages a projection 104 integral with one link 24 to maintain the push chair in its erected condition. The back-rest 54 is pivoted at 60 in slots 52 in plates 44 carried by the frame 20 and also carries pins 58 which may be selectively engaged in slots 46 48 and 50 to vary its inclination. When the back-rest is in a horizontal position the fabric hood 62 serves to locate a cot in position, the cot being further supported at the forward end by the foot-rest 92 which is swung upwardly on links 94. A sun canopy 72 is provided with pins 78 to engage an opposite pair of holes 74 in the handle 68 to allow its height to be varied.
Patent GB-386110-A (GB)
Title: A mechanically-operated draught excluder for attachment to the bottom of a door or the like
IPC: E06B7/20
Filed: 1931-12-24
Abstract: 386,110. Draughtexcluders for doors. ELLDRED, W. R., 37, Woodberry Way, North Finchley, London. Dec. 24,1931, No. 35734. [Class 20 (iii).] Relates to draught-excluders for doors, of the kind in which a sliding draughtexcluding element B, Figs. 1 and 3, is depressed into contact with the floor by cams c, when the door reaches the closed position, the cams being actuated by a rod C, one end c<2> of which engages with the hinge side of the door frame. According to the invention, the element B is guided in vertical guides a<5> formed on a foundation plate A. The latter is mounted in a central recess at the bottom of the door and is attached to the door by wood screws passing through endplates a<3>. At one edge of the door, the plates A, a<3>, are connected permanently together, while at the hinged edge they are detachably interconnected by a screw c<6>. This arrangement enables the complete device to be readily withdrawn from the recess. The element B is substantially of channel section and is formed with upstanding tongues b which engage between the guides a<5>. The channel holds a wooden lath which carries a strip bl of felt, rubber, or the like. Springs b<3> raise the element B when the door is open. The overall length of the rod C is adjusted by a compound nut c<5> which engages with right- and lefthanded screw threads formed on two sections of the rod.
Patent GB-1510232-A (GB)
Title: Connector for fixing a hollow first member to an upright second member
IPC: F16B7/04
Filed: 1975-09-01
Abstract: 1510232 Expanding jaw clamp H STAEGER 1 Sept 1975 [23 Jan 1975] 35891/75 Heading E2B A device for connecting a first member 5 to a second 1 having a fixing chamber 2 opening at a slot, the walls 4 of which overhang the chamber, comprises two jaw members 8, 9 each having outwardly turned hooks 21, the free ends of members 8, 9 when relaxed lying one within the other to enable passage of hooks 21 through the slot, the hooks being urged apart by means of cam member 15.
Patent GB-818473-A (GB)
Title: Improvements in disc brakes
Inventor: BUTLER HENRY JAMES
IPC: F16D65/52
Filed: 1954-12-11
Abstract: 818,473. Disc brakes. DUNLOP RUBBER CO. Ltd. Nov. 30, 1955 [Dec. 11, 1954], No. 35933/54. Addition to 709,305. Class 103 (1). In a disc brake assembly as claimed in the parent Specification, the non-rotatable friction pad guide plates thereof are replaced by the radially extending wall of a non-rotatable casing liquid-tightly surrounding the disc. In the embodiment disclosed in Figs. 1 and 2, a, spot-type disc brake is applied by means of a fluid pressure cylinder 13 through beams 10, the friction pads 15 being forced into frictional engagement with a disc 1 rotatable with a wheel 6 through apertures in liquid-tight casing 7 which surrounds the disc 1. The casing 7 is partially filled with a cooling liquid which may be continuously circulated through the casing and through a cooling system by a pump. Seals 16 and 9 prevent leakage of fluid from the casing. Vanes or paddles 24 may be formed on the outer periphery of the disc as shown in Fig. 7 for circulating the cooling liquid through the casing. Other embodiments are disclosed in the Specification. Specification 711,059 also is referred to.
Patent GB-807246-A (GB)
Title: Improvements in carburettors for internal combustion engines
Inventor: MENNESSON ANDRE LOUIS
IPC: F02M17/50
Filed: 1956-11-23
Abstract: 807,246. Carburetters. SOC. INDUSTRIELLE DE BREVETS ET D'ETUDES .S. I. B. E. Nov. 23, 1956 [Dec. 5, 1955], No. 35941/56. Class 7(3) A carburetter comprises thermosensitive means capable of preventing the throttle valve from coming into its normal minimum opening position (corresponding to idling) once the valve has been opened and arranged to give the throttle valve a minimum opening greater than this last mentioned value (and corresponding to accelerated idling) the means being such as to come sharply, i.e. not progressively, into action when the air temperature at the intake of the carburetter drops below the upper limit temperature of ice formation in the engine induction pipe. As shown a shim 13, carried by a bimetallic strip 11, is arranged to come between a fixed abutment 10 and an idling adjusting screw 9 carried by a member 8 rigid with the throttle spindle 5. The bimetallic strip comes into operation when the air temperature drops below the temperature mentioned above, such as 7‹C. The angular position of the pin 12 may be modified to adjust the position of the outer end of the bimetallic strip. The object of the invention is to prevent stalling due to ice formation on the edge of the throttle valve. In a modification (Fig. 3) the arrangement is such that when the temperature at the air intake ranges from 0‹C. to 7‹C. the shim 13 comes into position between the screw 9 and the abutment 10. Abutments 14, 14a limit displacements of the bimetallic strip.
Patent GB-1098387-A (GB)
Title: Improvements in or relating to the production of halogenated benzene derivatives
Inventor: ROE ANTHONY MAITLAID
IPC: C07C205/09
Filed: 1965-08-20
Abstract: 2,3-Dihalogenophenyl lithium compounds are prepared by reacting an o-dihalogenobenzene with a lower alkyl lithium or aryl compound in the prescence of a cyclic ether and, if desired, a saturated hydrocarbon solvent, the temperature of the reaction medium not being allowed to rise above - 50 DEG  C.  The lithium compound may be reacted with (a) solid carbon dioxide; (b) formamide and (c) a lower alkyl borate followed by hydrolysis; to give (a) 2,3-dihalogenobenzoic acid; (b) 2,3-dihalogenobenzaldehyde and (c) 2,3-dihalogenophenyl respectively.  The process is particularly applicable to the preparation of 2,3-difluorophenyl compounds. The 2,3-difluorobenzoic acid prepared as above may be converted to 2,3-difluoro aniline by reaction with an azide, e.g. sodium azide, in the presence of an acid and the difluoro aniline may then be reacted with acetic anhydride to give 2,3-difluoroacetanilide. The 2,3-difluorobenzoic acid may also be converted into its chloride, e.g. by treatment with thionyl chloride, and the acid chloride may be treated with an alkyl lithium or cadmium compound to give difluoroacetophenone. Alternatively, difluoroacetophenone may be prepared by treating 2,3-difluorophenyl lithium with an acetylating agent. 1,2,3-Trifluorobenzene may be obtained by treating the difluorophenyl lithium compound with perchloryl fluoride or by treating 2,3-difluoroaniline with a fluoroboric acid and nitrite and heating the diazonium borofluoride so formed. 2 - (2,3 - Difluorophenyl) - isopropylamine may be prepared by reacting difluorobenzaldehyde with ammonium acetate and nitroethane to give 1 - (2,3 - difluorophenyl) - 2 - nitropropene and treating this with lithium aluminium hydride. 2,3-Difluorobenzoic acid, its acid chloride and methyl ester; 2,3-difluorobenzamide; 2,3-difluorophenol; 2,3-difluoroaniline; 2,3-difluoroacetanilide; 2,3 - difluorophenyl) - isopropylamine are claimed per se.
Patent GB-882656-A (GB)
Title: Improvements in or relating to methods of and apparatus for refrigeration
IPC: F25B9/14
Filed: 1958-11-10
Abstract: 882,656. Refrigerating. LITTLE Inc., ARTHUR D. Nov. 10, 1958 [Nov. 14, 1957], No. 35995/58. Class 29 In a refrigerating system, gas at a certain high pressure flows through a regenerator 30, which cools it, to a space beneath piston 2 in cylinder 1 the flow being continued until the pressure in the space equals the high pressure. The flow is then discontinued and the gas expands in the cylinder performing external work. It then flows back through the regenerator picking up heat. As shown in Fig. 1, compressor C forces gas from low pressure reservoir LP through cooler A to high pressure reservoir HP continuously. Valve V1 is opened to allow gas to flow to the cylinder and, when the pressure has been established, it is closed again. The gas then expands and then valve V2 is opened to allow the gas to flow from the cylinder to reservoir LP. As shown in Fig. 5, the cylinder contains three pistons 2, 3, 4 defining spaces 9, 10, 11 of increasing volume, the spaces being connected through regenerators 24, 25, 30 to the gas supply. The pistons are coupled to a flywheel 13 having a friction break 15 and controlling operation of valves V1, V2 by cams 31, 32. Cold may be extracted from the system at exchanger 20.
Patent GB-388894-A (GB)
Title: Improvements in and relating to electrical connectors
IPC: H01R13/18
Filed: 1932-03-04
Abstract: 388,894. Plug couplings. HENDERSON, A., Cromdale, Banstead Road, Banstead, and ANDERSON, H. P. H., 62, Elgar Avenue, Tolworth, Surbiton, both in Surrey. March 4, 1932, No. 36075/31. [Class 38 (i).] A resilient socket consisting of a split sleeve a3 surrounded by a helical spring d is employed with a shouldered solid plug b<3> which is formed with a reduced neck b<4> adjacent the shoulder b to prevent the mouth of the socket from being opened when the plug is inserted. Both plug and socket are mounted in insulating sleeves e, f, the socket and its spring d being retained by a screw cap e2.
Patent GB-1292077-A (GB)
Title: Organosilicon compounds
Inventor: VAHLENSIECK HANS-JOACHIM
IPC: C07F7/14
Filed: 1970-07-24
Abstract: 1292077 Silanes DYNAMIT NOBEL AG 24 July 1970 [25 July 1969] 36118/70 Heading C3S Novel silanes of the formula (wherein R<SP>11</SP> represents an alkyl group) and other organosilicon compounds are prepared by reacting a silane of the formula H a SiR b X 4- ( a+b ), in which X represents halogen, alkoxy, or aryloxy, R reprssents halogen, alkoxy, aryloxy, alkyl, cycloalkyl or aryl, a is 1 or 2 and b is 0 or 1, with an ethylenically or acetylenically unsaturated compound in the presence of a platinum catalyst of the formula [PtR<SP>1</SP>Cl 2 ] c  in which R<SP>1</SP> represents a molecule of an unsaturated ketone and c is 1 or 2. Examples describe the preparation of gamma-glycidyloxypropyltrimethoxysilane, 3 - acetyl - oxypropyl - trichlorosilane, 3 - (2<SP>1</SP> - ethylcaproyloxy) - propyltriethoxysilane, 3 - methacryloxypropyl - trichlorosilane, 3 - methacryloxypropyl - trimethoxysilane, 3 - tetrahydrofurfuryl - 2 - methyloxypropyl - triethoxysilane, 3 - tetrahydrofurfuryl - 2 - methyloxypropyl - trimethoxysilane and the conversionof the latter to the corresponding triethoxysilane derivative by reaction with ethanol. Uses.-As resin additives, in glass dressings and finishes, for treating metals, minerals, wood, textiles and paper, and as bonding agents between polymers and glass.
Patent GB-415632-A (GB)
Title: Manufacture of indigoid dyestuffs
IPC: C09B7/08
Filed: 1933-12-22
Abstract: Indigoid dyestuffs containing at least two atoms of halogen are obtained by halogenating dyestuffs having the general formula <FORM:0415632/IV/1> in which X is alkyl and one of the hydrogens in the positions 1 may be replaced by halogen.  In examples: (1) the dyestuffs made by condensing 4-methyl-5-chlor-7-methoxyisatin - a  - chloride or 4-methyl-7-methoxyisatin - a  - chloride with 1-oxynaphthalene are halogenated in chlorbenzene with sulphuryl chloride: (2) the dyestuff from 4-chlor-1-oxynaphthalene and 4-methyl-7-methoxyisatin - a  -chloride is similarly halogenated: (3) the dyestuffs from 4-methyl-5-chlor-7-methoxysatin - a  -chloride or 4-methyl-5-brom-7-ethoxyisatin - a  -chloride and 1-oxynaphthalene are treated with bromine in glacial acetic acid or nitrobenzene.  The dyestuffs dye cotton, wool, natural or artificial silk, e.g., acetate silk greenish blue tints.  Halogen carriers such as iodine, iron or an iron salt and antimony penta chloride may be used and the following diluents are also specified; benzene, dioxane, tetrachlorethane and sulphuric acid, 4-ethyl-7-methoxy and 4-methyl-7-ethoxy and 4-ethyl-7-ethoxy isatins and 4-brom-1-oxynaphthalene are specified as components.
Patent GB-498768-A (GB)
Title: Improvements in or relating to holders for accessory parts of vacuum cleaners
IPC: A47L9/00
Filed: 1937-12-30
Abstract: 498,768. Brackets. SIEMENSSCHUCKERTWERKE AKT.-GES. Dec. 30, 1937, No. 36140. Convention date, Dec. 30, 1936. [Class 52 (v)] A holder for the accessory parts of vacuum cleaners comprises a flat frame 1 adapted to hang against the wall and provided with a number of upwardly and forwardly directed finger-like supports 4, 6, 8 upon which tubular accessories such as nozzles and connections may be supported, in combination with one or more additional frames 13, 14 adapted to hang from the first frame. The frames are bent from wire and comprise also loops 5 for supporting atomizer nozzles. The uppermost frame has eyes 15, 16 for suspension of a flexible tube 17.
Patent GB-1337317-A (GB)
Title: Process for the manufacture of hook type fastening devices and resulting fastening devices
IPC: A44B18/00
Filed: 1971-08-02
Abstract: 1337317 Pile fabrics for strip fastenings ELVERSELE NV 2 Aug 1971 [3 Aug 1970 24 Aug 1970 25 Aug 1970 13 May 1971] 36288/71 Heading D1 [Also in Division E2] In a hook-type fastening device each layer 1 of material is formed by a process wherein a woven material is produced having a surface provided with a plurality of loops 2 formed from synthetic, e.g. polypropylene, threads. The loops are divided by e.g. cutting or heating in the region of their apices 4 to form two divergent branches 5, 6 and a 'hooking' head 7 is formed at the end of each branch preferably by heat treatment. The weave of the material is preferably elasticated and as shown in Fig. 4 comprising a weft of multifilament nylon threads 8-19 and a warp of similar threads 20 and threads 21 of a natural or synthetic elastic material. Polypropylene thread 26 forms loop 22, passes under threads 9, 10 over 11, under 12, 13 and forms loop 24 .. and thread 27 similarly forms loops 23, 25 ... Threads 26, 27 are "fixed" by heat treatment and the under surface of the material may be stiffened by a coating of e.g. latex.
Patent GB-934010-A (GB)
Title: Improvements in impact clutches
IPC: B25B21/02
Filed: 1961-10-10
Abstract: 934,010. Screwing-up and unscrewing apparatus. ATLAS COPCO A.B. Oct. 10, 1961 [Oct. 18, 1960], No. 36301/61. Class 83 (3). [Also in Group XXIV] In an impact wrench the anvil 25 is driven by a pneumatic motor 29 clutched to the driving member 78 which in turn is coupled to a hammer 61 by a rotary axially disposed impact dog 70. The latter carries an eccentric pin 77 having a lost-motion connection with the driving member 78, and is provided with arcuate cut-away portions 73, 74 which, in conjunction with axially-spaced cams 59, 60 on the hammer 61, control the connection and disconnection of the dog and anvil through the circumferential edge portions 75, 76 of the dog. Assuming clockwise rotation, the driving arrangement is as shown in Fig. 5 under lowresistance conditions, the edge 76 of the dog 70 connecting the hammer 61 and anvil 25. When the resistance increases the lost motion between pin 77 and driving member 78 is taken up and dog 70 is rotated counterclockwise to the position shown in Fig. 5a and the drive thus interrupted. Hammer 61 continues to rotate for almost a revolution, when the engagement of surface 73 with cam 60 returns dog 70 to the position of Fig. 5, so that edge portion 76 transmits a rotary impact to anvil 25. When the resisting torque reaches a predetermined value the lost motion between pin 77 and driving member 78 is again taken up to rotate dog 70 counterclockwise, and the cycle is repeated. In a modification, Fig. 7 (not shown), the dog and anvil are each provided with four cam surfaces and a spring is incorporated between the driving member and the hammer. For counterclockwise rotation of the members the edge 75 of dog 70 is effective for transmitting impact to the anvil 25.
Patent GB-1327282-A (GB)
Title: Method of filtering molten metal
IPC: B22D11/119
Filed: 1970-07-27
Abstract: 1327282 Continuous casting ALCAN RESEARCH & DEVELOPMENT Ltd 27 July 1970 [8 Aug 1969] 36346/70 Heading B3F [Also in Divisions B1 C7 and F4] A flowing stream of molten metal, e.g. Al O<SP>r</SP> Al-base alloy, in a continuous casting process, is passed upwardly through a woven mesh filter, 17, Fig. 4, or 82, Fig. 7, maintained wholly submerged in the metal, to remove solid particles. The metal may be withdrawn from a holding furnace (12) by a siphon (14) with an outlet leg 15 having a heating jacket 23 and containing packing 24 over which argon is drawn by a suction pipe (27) at the top of the siphon to degas the metal. From the bottom of the leg 15, the metal passes to a chamber 29 on the rim 30 of which the filter 17, e.g. of several layers of woven glass fibre cloth, is held by a frame 18 (including a grid 38) and clamps 36. From the frame 18, the metal flows through a trough 19, with branches 19b, Fig. 6, leading to insulated reservoirs 46 each above a mould 11 with a starting platform 41. The filter layers may be spaced apart, with or without supporting grids; the layers may be discrete or woven together and mesh openings of 0À01-0À03 inch square may vary from layer to layer. A number of filters may be spaced along a flow path or a filter may be in series with a filter formed by a confined bed of refractory particles. In another embodiment, Fig. 9, the metal flows from either of two furnaces 62 through a trough 63 (without degassing) to a basin 64 from which it flows under a filter 82 beneath a grid 86 to rise through these into a frame 78. It then flows through a trough 91 to a tundish 93 with spouts 94 passing down into the metal in moulds.
Patent GB-1125803-A (GB)
Title: Programming means for washing machines
IPC: D06F34/30
Filed: 1965-09-07
Abstract: 1,125,803. Washing machines. W. HOLZER. 7 Sept., 1965 [7 Sept., 1964], No. 36425/65. Heading D1A. Programming means for a washing machine comprises a cam disc 11 driven from a motor 1 through a coupling 3, reduction gear 4 and stepping mechanism 8 and having a number of courses 12 controlling switches 13, 14 in lines 15 supplying current for controlling various functions of the machine. The motor 1 is controlled by a plurality of switches 23-28 for sensing the effect of the various functions of the machine, such as the heating of the water, and additional switches 17-20 in the lines 15 in series with the switches 13. 14 are controlled by a inductive coupling 5, 6, 9 from the motor 1 so that when the motor is operating the switches 17-20 are open and when the motor stops they are closed to supply the operating current to the machine.
Patent GB-961644-A (GB)
Title: Aircraft landing gear
IPC: B64C25/60
Filed: 1962-09-26
Abstract: 961,644. Aircraft undercarriages. G. E. HORNSBY. Sept. 26, 1962, No. 36473/62. Heading B7G. An aircraft undercarriage includes two parallel rigid sections 15, 17, 18, 19, 20 mounted at 14, 16 to the aircraft wing or fuselage 10, a wheel 25 being positioned between these sections on an axle whose square section ends 23a are guided for movement in slots 22 in plates 21 fixed to the two sections. The ends 23a extend into bosses 45 connecting the rods 44 of pistons 40 which move in cylinders 30 fixed to section members 18, 19. The pistons have an orifice through which a fluid is forced on relative movements of the wheel and the rigid sections to absorb the energy of landing impact and rebound. The fluid may be air in the upper cylinders 30 and liquid in the lower cylinders and the undercarriage may be fixed or retractable.
Patent GB-166859-A (GB)
Title: Improvements in and relating to turbine wheels
IPC: F01D5/30
Filed: 1920-12-31
Abstract: 166,859. Stokes, J. W. B., and Waldie, C. J. Dec. 31, 1920. Blades etc.; axial-flow type; motor power plant. -A turbine wheel adapted to withstand high strains and temperatures, driven for example by the exhaust gases of an internal-combustion engine, comprises two discs a secured to a boss b and provided with slots d for receiving the blades e. The blades are stamped from sheet metal, and are alternately long and short. After they have been placed in the slots d, a drift tool is inserted in holes f, giving the blades the looking formation g. The blades are then welded together at the tips h. The exhaust gases from an internalcombustion engine J, Fig. 6, may be led by nozzles L to opposite sides of the turbine wheels N, the nozzles being so arranged that the gases flowing in opposite directions do not meet. The turbines may drive a turbo-blower for supplying the charge to the engine at a pressure above atmospheric.