baber/WOPTO huggingface dataset:
Patent GB-1376051-A (GB)
Title: Electrophotographic materials
IPC: G03G5/07
Filed: 1972-02-24
Abstract: 1376051 Dibenzofuran-formaldehyde and dibenzothiophene-formaldehyde resins EASTMAN KODAK CO 24 Feb 1972 [1 March 1971] 8499/72 Heading C3R [Also in Division G2] A dibenzofuran-formaldehyde resin is made by the reaction of paraformaldehyde in formic acid with dibenzobenzofuran at 100 C. The solid reactant is dissolved in dichloromethane and residual formic acid is removed by extraction with aqueous K 2 CO 3 . Evaporation of the dichloromethane gives the resin. A dibenzothiophene-formaldehyde resin may be similarly made starting with dibenzothiophene.
Patent GB-232201-A (GB)
Title: Improvements in or relating to incandescent cathodes for discharge tubes
IPC: H01J1/15
Filed: 1925-03-31
Abstract: 232,201. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. April 8; 1924, [Convention date]. Vacuum tubes.-A cathode having a number of filament portions connected in parallel and mounted on two or more carriers is provided with one or more metal supports connected with intermediate points of the filament at the same potential. As shown in Fig. 1, V-shaped filaments 63 are mounted on two supports 60, 62, and the tops of the filament are connected by a support 61 secured by a wire 65 to a quartz tube- 64 spacing the supports 60, 62. In the arrangement shown in Fig. 2, a filament 5 is wound helically around supports 6 - - 9; the supports 6, 7 are mounted on hoods 15, 16 which are sealed into glass tubes 17, 18 and connected with leads, and the supports 8, 9 are joined at the ends by members 10, 11, the member 11 being mounted on a support secured to a hood 12, and the member 10 engaging with a quartz rod 14 spacing the supports 6, 7. The supports 8, 9 are thus connected with parts of the filament at the same potential. The wire may be welded to the supports or may be wound in grooves. The Specification as open to inspection under Sect. 91 (3) (a) comprises also another arrangement in which two hair-pin filaments are mounted on U-shaped supports, and the loops are connected by a wire. Such a cathode may be mounted with a grid in an envelope consisting of a glass tube and a cylindrical anode sealed thereto. The anode and the hoods may be of chrome-iron. This subject-matter does not appear in the Specification as accepted.
Patent GB-740447-A (GB)
Title: Improvements in or relating to metal vapour electric discharge devices
IPC: H01J13/20
Filed: 1952-04-03
Abstract: 740,447. Metallic-vapour apparatus. SIEMENS-SCHUCKERTWERKE AKT.-GES. April 3, 1952 [April 3, 1951], No. 8586/52. Class 39 (1). Each cylindrical anode shield is perforated both a the bottom and sides and de ionizing surfaces are arranged in the side-flow path so that when the arc discharge i: extinguished, the pressure equalizing flow in at the sides is de-ionized before i reaches the anode. An anode 1 and control grid 3 are enclosed within a jacket 4 provided with a baffle 6, lateral longitudinal slots 11 bounded by radial de-ionizing plates 12 and apertures 9 for the arc discharge. During inoperative periods, de-ionized vapour is drawn into the anode space from the region 13. In a modification, the de-ionizing plates are arranged radially at the lower end of the protective jacket and the slots 11 may be correspondingly wider to improve the thermal radiation from the anode to the cooled jacket 2. The converter may have one or more anodes, air or water cooling and ignition control or permanent auxiliary ionization.
Patent GB-308590-A (GB)
Title: Improvements relating to metallic coupling pipes
IPC: F16L27/04
Filed: 1929-03-16
Abstract: 308,590. Reure, F. L. R. March 23, 1928, [Convention date]. Ball-and-socket joints.-A train-pipe coupling A, Fig. 2, is joined to the adjacent pipe section 2 by a ball-and-socket joint, Fig. 3, fluid-tightness being secured by a rubber ring 18 and a metal ring 19 which are compressed on to the ball member 14 by a nut 20 secured to the socket member 17. The degree of inclination and of rotary movement between the coupling A and the section 2 is limited by screws 15 provided in the ball member and adapted to engage recesses 16 in the socket member. The other joints of the coupling pipe are preferably of like construction, while a bracket may be provided on the vehicle to support the pipe when not in use.
Patent GB-1382812-A (GB)
Title: Process and apparatus for producing dyed and cleaned material
IPC: D06B9/02
Filed: 1971-04-03
Abstract: 1382812 Combined dyeing and dry cleaning apparatus J & P COATS Ltd 30 March 1972 [3 April 1971] 8622/71 Heading D1L Dyed and cleaned textile material is obtained by passing a mixture of a dye and a dye carrier through a batch of material, after dyeing removing the mixture from the material and separating the dye remaining in the mixture from the dye carrier and storing separately the dye and the dye carrier, passing cleaning fluid through the material to clean it of loose dye and then through the store of separated dye to absorb this dye, separating the cleaning fluid from the dye and storing the fluid and repeating the process using the stored dye carrier mixed with fresh dye and the stored cleaning fluid. As shown dye from container 5, is fed to a mixing chamber 2, and also dye carrier from tank 1. After mixing the dye and dye carrier are transferred by main pump 7 and appropriate valves, to kier 11 containing the material to be dyed. After the material has been dyed, the dye/dye carrier mixture is pumped out of the kier and through filter 12 from which the dye is removed and the carrier via receptacle 27 and path 44 returned to stock tank 1. Cleaning fluid from tank 6 is now pumped into kier 11 and when all the loose dye has been taken up from the material either drained into tank 23 directly or pumped through filter 12 to take up dye stored on the filter. The fluid contained in tank 23 is separated in still 19 by evaporation into the cleansing fluid which is returned via tank 2 and path 43 to the cleaning fluid stock tank 6 whilst the receptacle 32, receives the dyestuff and dye carrier which .via line 47 may be passed to the filter 12 for separation and recovery. The. cleaning fluid is preferably acetone, whilstperchloroethylene admixed with a silicone fluid such as a low molecular weight member of the dimethyl polysiloxane series is 'the preferred dye carrier.
Patent GB-906685-A (GB)
Title: Dustproof static eliminator
IPC: B03C3/40
Filed: 1961-03-09
Abstract: 906,685. Discharging static electricity. MEECH ELECTRIC DRIVES (LONDON) Ltd. March 9, 1961 [Nov. 22, 1960], No. 8711/61. Class 35. In a static eliminator, the pins 46 fit in apertures 24 located in a slot between the ears 12, 13 of the non-conducting member A which slides into the conductive housing B such that the ears 12, 13 shield the upper surface 30, 31 of the housing. Various plastics from which the member A may be made are listed. The method of assembling the eliminator comprises inserting the cable C into the hole 18 which is closed at its remote end, pointing both ends of the needles 46 and pressing the needles 46 into the apertures 24 until one pointer end passes through the insulating layers 41, 42 of the conductor C.
Patent GB-1415516-A (GB)
Title: Capacitive computer circuits
IPC: G11C7/02
Filed: 1972-02-25
Abstract: 1415516 Analogue stores ULTRA ELECTRONICS Ltd 20 Feb 1973 [25 Feb 1972] 8732/72 Heading G4G The effect of stray capacitance on a circuit comprising a storage capacitance is compensated by the output voltage of a positive gain amplifier. The storage capacitor (not shown) is discharged through an FET T2 into a buffer amplifier A2. The stray capacitance is represented by capacitor C<SP>1</SP> connecting the switch T2 to earth. The switch T2 is connected to the non- inverting input of a fixed positive gain amplifier A1 the output of which is connected to the non- inverting input of the amplifier A2 through a pre-set capacitor C n . The switch S 1  may be closed between readings of the stored voltage.
Patent GB-1343748-A (GB)
Title: Tunnel boring machine
IPC: E21D9/10
Filed: 1972-02-25
Abstract: 1343748 Tunnelling machines ATLAS COPCO AB 25 Feb 1972 [25 Feb 1971] 8750/ 72 Heading E1F A tunnel-boring machine has a large rotary boring head 16 carried by a forward frame 12 that is laterally steerable on actuation of motor means 46, 47 extending between it and a rear frame 13 to which it is pivotally connected at 48, and the rear frame 13 has a rearwardly extending slide bar 35 that is slidably guided in an anchoring device 37 so that vertical steering of the machine can be effected by raising and lowering the slide bar in the anchoring device. Power actuated clutches are provided for locking the hinge connection between the frames.
Patent GB-128702-A (GB)
Title: Improvements in Buffers for Railway Vehicles and the like.
Inventor: WOOLLEY ARTHUR
IPC: B61G11/14
Filed: 1918-05-27
Abstract: 128,702. Woolley, A. May 27, 1918. Buffers.-Relates to buffers for railway, &c., vehicles of the kind comprising a cylindrical headed buffer A, a casing B, a base-plate E, main and supplementary buffing-springs G, F respectively, and a plate D separating the springs and adapted to engage a shoulder K on the casing so as to limit its forward movement and also to determine the initial compression of the supplementary spring. According to the invention, the supplementary spring F is located in a cylindrical cage C with slotted sides secured to the base-plate E and provided at its inner edge with lugs H adapted to engage lugs J on the plunger, which is also formed with slots L, the plate D passing through both sets of slots in the assembled condition of the buffer to engage the shoulder K. A hole P is located in the centre of the base-plate E and cage C, and a corresponding screw-threaded hole Q or a T-shaped aperture is provided in the plate D, so that the plate D can be drawn back against the pressure of the spring F by means of a screwed bolt or other tool. In assembling the buffer, the strong volute spring F is placed in the cage C, which has been secured to the base-plate E, and the plate D is arranged across the slots in the cage and drawn back by the bolt to compress the spring F and allow the cage to be engaged bayonet-fashion with the plunger A, in which the weaker spring G has already been placed. The bolt is then withdrawn, and the plate D allowed to engage both sets of slots and to abut against the shoulder K. The combined length of the plunger A and cage C is such that both springs G. F are slightly compressed, but the base-plate E projects slightly from the rear of the casing. When, therefore, the buffer is bolted to the headstock, the stronger spring F obtains a greater degree of compression. The extent to which the weaker spring A can be compressed in action is limited by the engagements of the plate D with the ends of the slots L. In dismantling the buffer, the plate D has to be drawn back by use of the bolt against the action of the spring G, so as to remove it from the slots L and thus permit the cage C and plunger A to be disengaged.
Patent GB-1379455-A (GB)
Title: Hydraulic control valve
IPC: F15B13/01
Filed: 1972-02-25
Abstract: 1379455 Valves ROBERT BOSCH GmbH 25 Feb 1972 [27 Feb 1971] 8809/72 Heading F2V [Also in Division G3] A valve controlling flow between port 15 and a work port 18 has a main valve member 3 housing a pilot ball 13 which, upon pressurization of port 15, engages seat 11 so that the pressure can unseat the main valve member against spring 5 to allow flow to port 18, e.g. to raise a load. Upon depressurization of port 15, the main valve member reseats and ball 13 engages seat 14 to prevent backflow via throttle  19 and passages 2, 10 to lower the load, ball 13 is unseated by tappet 17 to drain passages 2, 10 so that pressure in port 18 acting on annulus D-d unseats the main valve member, this control mode being available by making the clearance area P around ball 13 at least equal to the area of passage 19.
Patent GB-1174553-A (GB)
Title: Improvements in Drivers Masks
IPC: A62B18/08
Filed: 1968-02-23
Abstract: 1,174,553. Respiratory appliances. SHIMADA RIKA KOGYA K.K. 23 Feb., 1968 [23 Feb., 1967; 9 Oct., 1967 (2)], No. 8830/68. Heading AST. [Also in Divisions B7 and G3] A divers mask comprises a non-return valve 22 one side of which communicates with a mask interior and the other side with a perforated bag 23, 23' to allow exhalation. In Fig. 2 the mask is divided by a portion 3a and air is supplied to the lower portion by hose 8 and a hole 10b (Fig. 3) in cylinder 10, the hole being opened by a member 9 depressed by a button in contact with the water. Exhaled air passes through openings 11a and displaces the edge of a rubber disc 22 held over the openings, then inflating flat rubber bags 23, 23' from which the air gradually escapes through perforations 23a, 23'a. In Figs. 6-8 (not shown) air is released from the upper portion of the mask. In Figs. 10-12 (not shown) a reservoir (32) collecting water is provided. The mask makes the divers voice clearer on a telephone.
Patent GB-470991-A (GB)
Title: Improvements in or relating to tables
IPC: A47B1/05
Filed: 1936-03-25
Abstract: 470,991. Extending tables. LUPTON, F., and LUPTON & SONS, Ltd., J. March 25, 1936, No. 8856. [Class 52 (iii)]. In a table having pairs of hinged leaves 5 carried by extensible inclined slides 4, the upper leaf of each pair being foldable inwardly on extension, the said upper leaves are supported in the raised position by transverse bars 8 which are automatically turned down on returning the leaves to the unextended position. The bars are preferably spring-loaded and turn up as the leaves are drawn out.
Patent GB-727989-A (GB)
Title: Improvements in or relating to the production of benzene polycarboxylic acids or derivatives thereof
IPC: C07C51/265
Filed: 1952-04-07
Abstract: Benzene polycarboxylic acids and derivatives thereof are obtained by oxidizing alkyl benzenes and converting the relatively difficulty oxidizable intermediately-formed acids into esters, salts or anhydrides, which are further oxidized with oxygen or gases containing oxygen, by themselves, or in the mixtures containing them. In examples, the catalytic oxidation of methyl p-toluate with or without the catalyst and residue from a previous oxidation, methyl m-toluate, and methyl o-toluate to the corresponding mono-methyl terephthalate, isophthalate, or phthalate, the latter product also containing the acid, anhydride and diester, is described; xylene mixtures are catalytically oxidized, the mixture of acids separated is esterified with methanol, and further oxidized to give among the products mono- and di-methyl terephthalate; lead and other salts of p-toluic acid are oxidized to give isophthalic salts; m-toluic anhydride and p-toluic anhydride oxidized similarly give iso- and terephthalic acids, isolated by converting into their methyl esters; pseudo-cumene is oxidized, the acid product esterified and further oxidized, the process being repeated with the residues, mixed with fresh hydrocarbon, the products being repeatedly esterified, and oxidized to give as a final product trimellitic acid trimethyl ester. The acid oxidation products may be esterified with alcohols of up to 4 carbons, and with aromatic alcohols, especially those which on further oxidation give the same carboxylic acid group as the initial acid; all residues may be re-cycled.
Patent GB-1148691-A (GB)
Title: Improvements in the ignition of gas cooker burners
Inventor: BRADLEY JAMES ALBERT
IPC: F24C3/10
Filed: 1967-02-24
Abstract: 1,148,691. Ignitinggas burners. GAS COUNCIL.. 5 March, 1968 [24 Feb., 1967], No. 8887/67. Heading F4F. An ignition device for igniting the burners of a gas cooker arranged to burn natural gas comprises a cylindrical metal explosion chamber 1 connected to the burners by flash-tubes 5, provided with vents 4 and supplied with an explosiveair/gas mixture via an opening 8 when a valve (not shown) controlling the gas supply through a pipe 9 is opened, and an electrically heated filament 6 to ignite the mixture, the filament 6 being so constructed that when energized and subjected to dynamic flow conditions of the gas/air mixture it is so cooled as to be insufficiently hot to operate. The gas control valve is opened momentarily and the flow conditions rapidly subside into a quiescent state so that the filament heats up and ignites the mixture in chamber 1 to provide a flash along the tubes 5 to ignite any burner to which gas is supplied. The filament may be permanently heated or intermittently by a switch.
Patent GB-104287-A (GB)
Title: Improvements in Attaching Helmets to Diving-dresses.
Inventor: DAVIS ROBERT HENRY
IPC: B63C11/02
Filed: 1916-06-24
Abstract: 104,287. Davis, R. H. June 24, 1916. Divers' drcss.-In a divers' dress in which the india-rubber collar of the dress is held by bolts between the breast-plate of the helmet and one or more metal straps, the collar is provided opposite some or all of the bolt-holes c with lugs d and canvas or other insertions e, which insertions may be continuous throughout the collar. The collar may also have a continuous or divided bead f at its inner edge, the bead engaging one or more recesses in the breast-plate, and the strap preferably having one or more extensions bearing upon the bead. The collar and strap may have engaging ribs and recesses.
Patent GB-270069-A (GB)
Title: Improvements in jigging conveyors
IPC: B65G27/00
Filed: 1926-04-06
Abstract: 270,069. Leithead, A. April 6, 1926. Aligned sleeves and pin fastenings.-Adjacent sections of the trough A of a jigging conveyer are secured together by a bar H at each side which fits between bracket members G<1> - - G' and beneath straps J, J<1>, and is held in position by pins P, P<1>.
Patent GB-191993-A (GB)
Title: Improvements in floats for fishing
IPC: A01K93/00
Filed: 1922-03-29
Abstract: 191,993. Sowker, W. S. March 29, 1922. Line floats; spinning tackle.-A line float a is fitted with blades d by means of which it is caused to rotate by the action of running water. A swivel is fitted at the end b and a fixed eye at the end c to which the line g carrying the bait is attached. Sectional blades may be used instead of a continuous one as shown.
Patent GB-1419309-A (GB)
Title: Method for grafting organic polymers onto inorganic colloidal substances
IPC: C08F292/00
Filed: 1973-02-23
Abstract: 1419309 Polymers bonded to colloidal materials LION YUSHI KK (LION FAT & OIL CO Ltd) 23 Feb 1973 [24 Feb 1972] 9023/73 Heading C3P A polymer is bonded on to the surface of the particles of a colloidal inorganic substance by forming a suspension of an inorganic colloidal material and a radical polymerizable monomer in a reaction medium; introducing into the suspension a reactant to generate fresh surfaces on the inorganic material and then initiating radical polymerization. The fresh surfaces may be formed by forming the colloid itself in the presence of the monomer or by modifying an existing colloid by partially dissolving it or changing it to a crystalline form. Polymerization occurs spontaneously on the fresh surface, but is accelerated if an aqueous solution of sulphurous acid is used as one reagent for the formation or partial dissolution of the colloid. In the examples blast furnace slag, copper smelting furnace slag, baked sand or aluminium hydroxide is reacted with sulphur dioxide in the presence of the monomer, an Al(OH) 3  gel is formed from Al 2 (SO 3 ) 2  and ammonia, and a pre-formed calcium carbonate gel is converted to crystalline vaterite by warming. The exemplified monomers are methyl acrylate, methyl methacrylato and styrene. The products are used as moulding materials, when they have a high polymer content, or fillers.
Patent GB-1006241-A (GB)
Title: Improvements in apparatus for sensing the presence of vehicles
IPC: B61L13/04
Filed: 1962-03-08
Abstract: 1,006,241. Vehicle presence detectors. GENERAL PRECISION Inc. March 8,1962 [March 13,1961], No. 9042/62. Heading G1N. The frequency of oscillation of a transistor oscillator 14,15, Fig. 1 is varied by the metallic mass of a vehicle 13 in the field of an inductive loop 12 disposed along a vehicle route, positive feedback being provided by resistor 21 and capacitor 22, and the inductive loop 12 with tuning capacitors 23, 24 being included in a negative feedback path to provide negative feedback at all frequencies except that to which the loop circuit is tuned. The oscillator output is limited in a circuit including a transistor 29 and applied to a discriminator circuit 37 to produce a D.C. output signal. In a modified arrangement Fig. 2 (not shown) the limiter output is applied to a transistor emitter-follower stage which effects detection via a network comprising a series resistor and a shunt high-Q tuned circuit. Arrangements in which the oscillator frequency is compared with that of a standard or that of another including a second inductive loop are described with reference to Figs. 3 and 4 (not shown) respectively, the latter arrangement is described as suitable for the control of gates in parking lots which can be opened by the presence of a car outside if the inside space is not occupied. In a transistor heterodyne arrangement, Fig. 5, the two frequencies are applied to the base of transistor 62 via coupling capacitors 63, 64 and a low Q filter circuit 67-69. Higher frequencies are filtered from the output by a grounded capacitor 72. A transistor detector is described with reference to Fig. 6 (not shown).
Patent GB-1260264-A (GB)
Title: Apparatus for injecting material into aerosol cans
Inventor: SKIDMORE RICHARD HALL
IPC: B65B31/10
Filed: 1970-02-25
Abstract: 1,260,264. Reciprocating pumps. SPRAYON PRODUCTS Inc. Feb.25, 1970 [March 3, 1969], No.9042/70. Addition to 1, 103, 083. Heading F1A. The apparatus of the parent Specification for charging material in a reservoir 35 into an aerosol can 10 containing a liquefied propellent gas is modified in that the injection piston 48 is reciprocated by an air operated piston and cylinder motor 46. The motor is operated by an air supply maintained at a constant pressure by a regulator, whereby the amount of material delivered is substantially constant irrespective of the material's viscosity. Reversal of the motor is controlled by a valve 52, Figs. 7 and 8 (not shown) under the control of pilot valves actuated by the motor at the ends of its stroke. To indicate the amount of material injected a counter 54 records the number of strokes, the counter being possibly adapted to stop the motor automatically after a predetermined number of strokes. Each aerosol can 10 is raised on a platform 31 into sealing engagement with the outlet of the pump cylinder 38 by a toggle mechanism 64 actuated by downward movement of a lever 67. The cylinder 38 and the reservoir 35 are removable from a support 34 for cleaning. A ball check valve in the bottom of the cylinder 38 prevents material escaping from the reservoir when the filled can is removed.
Patent GB-492802-A (GB)
Title: Improvements relating to mercury and other sealed container switches
IPC: H01H61/06
Filed: 1937-02-24
Abstract: 492,802. Magnetic switches; mercury switches. CIANCHI, A. Feb. 24, 1937, No. 9103/38. Divided out of 490,946. [Class 38 (v)] When a bimetallic strip 10 carrying a U-shaped magnet 9 moves to the left, an armature 7, within a container 1 is pulled downwards and contacts operated. In the form shown the armature 7 is fixed to a float 3 the depression of which causes mercury to enter through a hole 6 and bridge electrodes 5, 8. This completes circuit which includes the heating coil 11 of the bimetallic strip so that should there be an overload, the strip will move back into the position shown and break the circuit. The device could also function as an interrupter. In a modification, Fig. 2 (not shown), the heating coil 11 is arranged in parallel with the contacts 4, 8 and the device causes the continual flashing of a series of lamps. The bimetallic strip carries also a second magnet which operates a second mercury switch controlling other lamps, the arrangement being such that when one set of lamps is " on " the other is " off ". Specifications 485,259, 485,564, and 490,946 are referred to.