baber/WOPTO huggingface dataset:
Patent GB-584216-A (GB)
Title: Improvements in the manufacture of ignitors for vapour discharge apparatus
IPC: H01J13/38
Filed: 1944-12-15
Abstract: 584,216. Moulding electrodes. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Dec. 15, 1944, No. 25189. Convention date, Dec. 23, 1943. [Class 87 (ii)] [Also in Group XL] An ignitor rod 1, Fig. 2 of semi-conducting material is provided with a carbon holder 2, by moulding the material of the rod in a carbon mould 2, Fig. 1, under pressure by a screwplug 7 formed with a vent hole 8 for the escape of liquid and gas. After baking, the mould is machined off at its lower part to expose the length of the ignitor rod and the plug is threaded at 9 to provide a connection for a lead. The lower end of the rod may be formed during moulding with grooves and ridges, Fig. 3 (not shown). The material of the rod consists of a mixture of the carbides of silicon and boron with a ceramic binding material such as a mixture of alkaline earths with titanium or zirconium oxide and carbon and a liquid binding agent. The tip of the rod may be baked in an oxidizing atmosphere to give its surface a layer of higher resistivity.
Patent GB-1433987-A (GB)
Title: Method of producing moulded plastics commutators
IPC: H02K13/00
Filed: 1974-06-06
Abstract: 1433987 Moulding commutators LWORNER 6 June 1974 [6 June 1973] 25209/74 Heading B5A In a method of producing an electric machine commutator, a hollow cylindrical metal body with inwardly projecting anchoring elements, corresponding in number to a predetermined number of commutator segments, is placed in a mould and the body filled with molten insulating material to form a core joined to the body, which body is cut to form the commutator segments while the core is hot. The metal body may be quenched before it is cut.
Patent GB-623815-A (GB)
Title: Improvements in or relating to catalysts for use in the synthesis of hydrocarbons
IPC: C07C1/04
Filed: 1946-08-23
Abstract: The catalytic synthesis of liquid organic compounds from carbon monoxide and hydrogen is effected by passing them over a hydrogen reduced iron pyrite ash.  Promoters may be present, potassium chloride, potassium phosphate, alkali metal aluminates, potassium and sodium carbonate being specified, or the oxides of copper, silver, nickel and thorium.  The catalyst is suitable for fixed bed or fluidized type operation.  The synthesis is carried out at high pressure and within the temperature range 350-650 DEG  F.
Patent GB-645989-A (GB)
Title: Improvements in or relating to very-high-frequency electric-discharge-tube amplifiers
IPC: H03D7/00
Filed: 1946-08-01
Abstract: 645,989. Valve amplifying circuits. PHILIPS ELECTRICAL, Ltd. Aug. 1, 1946, No. 25360/48. Convention date, Jan. 31, 1940. Divided out of 645,936. Drawings to Specification. [Class 40 (v)] In a very high-frequency amplifier in which the pass-band is mainly determined by circuits subsequent to the first valve, noise produced by transit-time grid current is utilized to balanceout cathode emission noise by detuning the input circuit so as to present an impedance which is slightly capacitive over the pass-band of the amplifier, the overall gain being reduced by 20 per cent or more. Any distortion of the signal occurring as a result of the detuning may be compensated by detuning a following stage in the opposite sense. Specifications 645,936 and 645,990 are referred to.
Patent GB-621730-A (GB)
Title: Improvements in and relating to means for controlling the starting of electric discharge devices
IPC: H05B41/12
Filed: 1944-12-18
Abstract: 621,730. Control systems for space discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 18, 1944, No. 25373. Convention date, Dec. 17, 1943. [Class 38 (iv)] A starting circuit, for a discharge lamp having a thermionic electrode or electrodes, which does not require energizing during operation of the main discharge but gives adequate time for the electrode heating, comprises a switch M with normally open contacts 25, 26 in series with normally closed contacts 21, 22 of a thermal starting switch T, electromagnetic closing means 27 therefor in series with both, and electric discharge means G shunting said contacts but in series with the aforesaid elements. The discharge means may be a glow discharge device as shown (Fig. 1), or a thermal glow switch (Fig. 2, not shown), and is responsive to a voltage lower than the supply voltage but higher than the voltage across the lamp when in operation. Condensers 24 and 29 may be connected as shown in order to avoid sparking and radio interference respectively.
Patent GB-1471789-A (GB)
Title: Electrostatic recording device
IPC: H04N1/032
Filed: 1975-06-13
Abstract: 1471789 Electrostatic recording head PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 13 June 1975 [18 June 1974] 25373/75 Heading H4F Each recording electrode of an electrostatic recording device comprises sub-electrodes insulated from each other and selectively connectible to a high voltage source so that "dots" of different size and charge density may be recorded. In a first embodiment, Figs. 1a and 1b, a recording electrode 1 comprises 23 insulated wires each of which acts as a separate recording electrode when connected to a high voltage. These wires are moulded into a square shape in an insulating material 4 and connected together in three groups comprising respectively the central wire 7, the middle ring of wires 8 around wire 7, and the outer ring of wires 9 plus the four corner wires. These three groups are connected to a high voltage generator 55 when switches 51-53 are actuated. In a second embodiment, Fig. 2b, a recording electrode comprises a central sub-electrode 12 and sleeve subelectrodes 13 and 14 insulated from each other. With three "groups or sub-electrodes" eight recording density degrees i.e. black, white and six grey values, may be recorded by selective actuation of switches 51-53, Fig. 3, not shown.
Patent GB-1505421-A (GB)
Title: Sealing device for coke oven doors
IPC: C10B25/16
Filed: 1975-06-13
Abstract: 1505421 Coke oven doors CARL STILL and RUHRKOHLE AG 13 June 1975 [14 June 1974] 25398/75 Heading C5E A sealing device for sealing a coke oven door 2 against the frame 8 comprises two metal blades 13, 14 having a resilient strip 16 and metal strip 15 sandwiched therebetween, the resilient strip protruding beyond the blades; the device is clamped by hook bolts 12 to the lateral edge of the door and, in use, the protruding resilient strip is compressed into the taper on blade 13 and thus forms a seal. The arrangement is such that, as the resilient strip wears away, the metal strip 15 may be knocked down between the metal blades to force more of the resilient strip to protrude from the blades. The resilient sealing strip may be of asbestos or of asbestos rope covered with fine wire cloth. The metal strip 15 may be a single strip or a plurality of strips separated by the hook bolts.
Patent GB-264215-A (GB)
Title: Improvements in and relating to the control of dynamo electric machines
IPC: H02K23/02
Filed: 1925-10-12
Abstract: 264,215. British Thomson-Houston Co., Ltd., and Pollock, A. A. Oct. 12, 1925. Running generators in parallel. - A parallelconnected group of direct-current generators G1 - - G3 driven at definitely related speeds, e.g. mounted upon a common shaft or driven by synchronous motors from a common supply, and having decompounding windings DS1 - - DS3 to ensure proper load sharing, is arranged to yield a load characteristic as in Fig. 2 by giving each machine a compounding winding F1 - - F3 energized from a common exciter E which is overcompounded by a winding CS carrying the whole or a part of the output of the group. By arranging the exciting circuit of this machine to reach saturation at the full output of the group the decompounding windings cause a fall of voltage on overload and a limitation of current on short-circuit. The compounding effect of the coil CS may be varied to vary the load characteristic.
Patent GB-151265-A (GB)
Title: Improvements in motor vehicles
IPC: B60K17/10
Filed: 1920-09-04
Abstract: 151,265. Rousseau, L. Sept. 17, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Pneumatic transmission apparatus; independent driving on opposite sides. - The internal - combustion engine 1 drives an air-compressor 2 supplying air to a reservoir 4 from which it passes through a distributing-valve 8 to either or both of two motors 5, 6 driving the rear wheels through chain gearing. Each rear wheel is fixed on a sleeve 12 which rotates loosely on the axle 14 and carries a chain wheel 16 driven from one of the motors.
Patent GB-1319815-A (GB)
Title: Preparation of electrophotographic developers
IPC: G03G9/097
Filed: 1970-05-27
Abstract: 1319815 Electrostatographic developer FUJI PHOTO FILM CO Ltd 27 May 1970 [ 28 May 1969] 25549/70 Addition to 1316693 Heading G2H [ Also in Division C3] An electro-photographic developer comprises coloured polymer particles at size 0À1 - 100 microns, the particles having been produced by producing a kneaded liquid including at least one liquid synthetic resin monomer an initiator a finely divided inorganic dispersion stabilizer which is sparingly soluble or insoluble in water and as fluidizer, a resinous substance having a solubility parameter value of 7À8-16À1, dispersing said composition in an aqueous dispersion medium and polymerizing the monomer(s), a dye and/or pigment being present during polymerization. The dye can either be mixed with the liquid monomer composition or added subsequently i.e. after polymerization has started. In the examples the following particles are produced: (1) black styrene/ethylacrylate copolymer particles; (2) black styrene/n-butyl methacrylate copolymer particles; (3) red acrylic acid/methyl methacrylate copolymer particles; (4) yellow vinyl acetate/ethyl methacrylate copolymer particles and (5) blue polystyrene particles.
Patent GB-705763-A (GB)
Title: Delayed-release relays
IPC: H01H50/40
Filed: 1951-11-01
Abstract: 705,763. Electromagnetic switches. FORGES ET ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE JEUMONT. Nov. 1, 1951 [Nov. 13, 1950], No. 25559/51. Class 38(5) A relay with delayed 'release' but a quick ' operation' has short-circuited elements such as a copper bar C for delaying the decay of flux and a magnetic shunt consisting of two ferro-magnetic springs S1, S2 placed between the bar C and the coils B1, B2. When the armature A is attracted, since to start with the gap between it and the pole pieces P1, P2 is at a maximum, the flux is weak and some passes through the magnetic shunt Sl, S2 without being influenced by the bar C. A rapid attraction is therefore the result. The reluctance of the magnetic shunt may be varied by separating the springs S1, S2 a variable amount by a non-magnetic hexagonal nut D. In a modification the springs S1, S2 extend close to the armature.
Patent GB-534692-A (GB)
Title: Improvements in or relating to electrical insulating compounds for sealing cable ends
IPC: H01B3/08
Filed: 1939-09-11
Abstract: 534,692. Cable-ends. PYROTENAX, Ltd., and CLOTHIER, G. D. Sept. 11, 1939, No. 25575. [Class 36] Powder-insulated cables are sealed at the ends by a compound, comprising, for example, bitumen, mixed with solid insulating material in powdered, granular or fibrous form where softening point is higher than that of the compound. Examples given are silica and glasswool.
Patent GB-895771-A (GB)
Title: Improvements in and relating to colour television
Inventor: OXENHAM JOHN KENNETH
IPC: H04N9/24
Filed: 1957-08-13
Abstract: 895,771. Colour television. SYLVANIATHORN COLOUR TELEVISION LABORATORIES Ltd. July 22, 1958 [Aug. 13, 1957(2)], Nos. 25582/57 and 25583/57. Class 39(1). A colour viewing screen of the kind having indexing stripes is made by applying to a transparent base 10, Fig. 1, groups of insulating colour stripes R, G, B leaving spaces I therebetween, applying a coating 11, 12 of electrically conducting material over the stripes and spaces, the nature of the materials used and the method of application being such that the spaces are provided with a coating 11 of good electrical conductivity while the coating 12 over the groups of stripes is discontinuous, the coating 11 in the spaces being connected together and applying over the coating 11, 12 of conducting material a layer of high secondary electron emissive material 13. The conducting material may be aluminium and the stripes R, G, B may themselves be separated by inactive insulating stripes 0. The coating of conductive material may be divided into two mutually insulated parts having portions interleaved with one another e.g. by connecting together the stripes 11 in alternate spaces I. Specification 895,772 is referred to.
Patent GB-533929-A (GB)
Title: Tapered band width dead-end filters
IPC: H03H7/01
Filed: 1939-09-11
Abstract: 533,929. Impedance networks. HAZELTINE CORPORATION. Sept. 11, 1939, No. 25601. Convention date, Oct. 7, 1938. [Classes 40 (iii)] and 40 (v)] In a coupling circuit of the kind disclosed in Specifications 524,547, 524,548 and 524,549, in which the shunt reactance between a pair of terminals is complemented by means of a dead-end filter so that the resultant impedance is kept at a uniform maximum value over a wide frequency band, the filter comprises several portions of which the bandwidths increase progressively towards the dead-end, where a resistance termination matches the image impedance over the useful pass-band. Thus the filter portion at the dead-end has a pass-band much wider than the useful pass-band of the whole filter. In Fig. 1, the low-pass filter is of constant k configuration, but the values of the elements vary as shown so that the band-widths of successive halfsections towards the dead-end increase by a factor a. The terminating half-section away from the dead-end comprises only the mid-shunt capacitance aCu, and the resultant impedance Z is built up across the total capacitance Cn (1+a). In Fig. 3 (not shown), the tapering of bandwidth is applied to whole sections instead of to half-sections. These arrangements represent tapering according to an exponential law, but better results are generally obtained when the bandwidth varies inversely as the square root of the number of the section (or half-section) counting from the dead-end, although a cube-root or even a fourth-root law may be used if a wider band is desired at the expense of uniformity. The band-pass filter, Fig. 6, which comprises two full sections terminated by a constant k midshunt arm L3, C3, the tapering being preferably according to the square-root law, presents uniform impedance across the capacitance C3 and also uniform transfer impedance between the pairs of terminals 1, 2 and 3, 4. An equivalent of the latter arrangement is shown in Fig. 8 as a coupling circuit between two thermionic valves 10, 11, the condensers Ca, C6 being formed wholly or partly by capacitances inherent in the valves. The inductances La, Lc are disposed to have zero coupling between them, and the two inductances Lb<SP>1</SP>, Lb<SP>11</SP> in series are dimensioned so that the coupling coefficients kl, k<SP>11</SP> are equal. The dead-end Cc, Lc may be utilized as a coupling to an auxiliary circuit. Fig. 9 shows a simplified arrangement which is equivalent to that of Fig. 8.
Patent GB-493396-A (GB)
Title: Improvements in and relating to detachable hub caps for vehicle wheels and securing means therefor
IPC: B60B7/02
Filed: 1937-09-22
Abstract: 493,396. Vehicle wheels ; nuts. DUNLOP RUBBER CO., Ltd., and GOODYEAR, C. E. Sept. 22, 1937, No. 25672. [Class 144 (i)] [Also in Group XXV] A hub cap 12 is secured by springing its beaded edge 14 over shoulders on the wheelattachment nuts 5. In the form shown in Fig. 1, the shoulder is constituted by a ring' 19 sprung into a groove in the nut. Fig. 3 shows a nut formed with a groove 18 to receive the edge of the cap.
Patent GB-205963-A (GB)
Title: Improvements in or relating to fuse boxes and connections
IPC: H01H85/20
Filed: 1922-09-23
Abstract: 205,963. Chalmers, A., and Mitchell, W. F. Sept. 23, 1922. Fuse-boards.-Fuse-boxes, adapted to be fitted on to two or more supply cables at various points to convey current to ship's cabins &c., thus dispensing with bus-bars &c., are formed with cavities 3 through which the cables 5 pass and have contact clips 4 adapted to embrace bared sections of the cables and fuses 8, each of which is connected at one end to a contact clip 4 and at the other to a terminal 9. The continuity of the lead sheathing of the cables is maintained by links 11 attached to the sheathing by clips 10. Specification 24386/11 is referred to.
Patent GB-328181-A (GB)
Title: An improved rack for rubber stamps or the like
IPC: B41K1/58
Filed: 1929-08-24
Abstract: 328,181. Davies, W. W. Aug. 24, 1929. Racks.-A rack for rubber stamps &c. consists of a notched member to support the stamps &c. combined with a mirror, which may be plane, concave or convex, positioned so that the bases of the stamps &c. can be seen therein. In the construction shown a notched shelf 3 projects horizontally from a vertical back member 2 carried by a wedge-shaped base 1 on which a mirror 6 is supported. The back may be provided with hanging means or formed as a stationery rack.
Patent GB-320486-A (GB)
Title: Improvements in vehicle bodies of the type in which the top is arranged so that it can be opened
IPC: B60J7/06
Filed: 1928-09-08
Abstract: 320,486. Austin, Sir H. Sept. 8, 1928. Grant of Patent revoked. Hoods.-In hoods in which a flexible cover is supported on hoop-sticks the ends of which run in tracks on the cantrails and are operated by flexible connectors at each side two metal channels are attached to each cantrail which channels are open towards either the interior or exterior of the vehicle, are disposed one above the other and each has its free edges inturned leaving a space between them in which are guided the rollers of one of a pair of chains having links which lie behind the said edges to keep the chain in place. As shown the cantrails A are provided with metal tubes C open at the top c and housed in grooves B. The metal tubes C have inflatable tubes D which when inflated press the cover E against rigid plates F secured to the cantrails and so provide weathertight joints. The side tubes D may be continued across the front rail and be inflatable in any suitable manner or as shown the front hoop-stick h may be adapted to impinge against a soft rubber cord G and the side tubes D may be connected across the front by a tube d. The hoop-sticks are provided with brackets j, j<1> to the front one of which is connected one or both ends of an operating chain M housed in channels J, K open either towards the interior or the exterior of the vehicle and one above the other the free edges t being inturned. Each alternate hoop-stick bracket j is connected to the chain so that the cover may fold when fully opened, the brackets j<1> on the other hoopsticks rising when freed from the rigid plate F.
Patent GB-699849-A (GB)
Title: Improvements in or relating to card filing devices
Inventor: MCLEOD PETER JOHN
IPC: B42F17/02
Filed: 1952-10-16
Abstract: 699,849. Filing papers. BRITISH TABULATING MACHINE CO., Ltd. Oct. 16, 1952, No. 25973/52. Class 146 (i). Locking followers. An adjustable stop comprises a backing plate having two or more guides to retain a resilient wire or wires the outer ends of which are held in frictional engagement with the side walls of a drawer by the resilience of the wire, the guides limiting the movement of the wire or wires substantially to that necessary for withdrawing the outer ends from engagement with the side walls. As shown in Fig. 1, a plate 1 has portions of the edge turned over to form guides 2, 3 and 4 for retaining'a single wire, the guide 2 surrounding the central portion of a U-shaped section 5, the limbs of which are bent to form semicircular finger grips 6, and the guides 3, 4 forming slides for sections 7, 8 which extend just beyond the sides of the plate and are then bent at right angles and then to L or U shape to form gripping ends 9, 10. Rubber sleeves 11 may be provided on the outer ends 9, 10 to engage the grip on the drawer. As shown in Fig. 3, two wires 17, 18 are secured by their inner ends in a guide 20 on a plate 16 and by sloping guides 19, the wires being bent at each end as shown and bent centrally to provide finger grips 6.
Patent GB-570833-A (GB)
Title: Windscreen attachments for use on motor vehicles
IPC: B60J1/02
Filed: 1939-09-18
Abstract: 570,833. Label holders. PILKING- TON, S. E. Sept. 18, 1939, No. 26042. [Class 73] [Also in Group XXXII] A :container A to be carried on a wind-screen is open at one end which can be closed by a member B detachably secured to the container for example by bayone catches or screw threads The member B has i recess C for receiving the open end of the container and is secure( to the wind-screen by adhesive on a flange G provided with shallow grooves. A groove H filled with moisture-absorbent packing is provided near the edge of the flange. Holes K are made for drainage. The recess F surrounded by the flange serves to receive a card for printed matter.
Patent GB-687470-A (GB)
Title: An improved sprayer of liquids, more particularly of polishing wax
IPC: A47L13/56
Filed: 1951-11-07
Abstract: 687,470. Forcing liquids by gaseous pressure. STAEHLE, G. Nov. 7, 1951 [Nov. 14, 1950], No. 26043/51. Class 102 (ii). In apparatus for spraying liquids, an air pump 3 is mounted within the liquid container 1 and actuated by a handle 13 that can be locked, so that it can be used as a carrying handle, by a bolt 9 engaging a bayonet slot in a member 10 attached to the container; a spring 7 is located between the piston 6 and the end of the cylinder to apply pressure to retain the catch. A lever 11 is attached to the handle and can be depressed to actuate a rod 15 abutting a diaphragm 15'and thus actuate a rod 17 to open the valve 18 to permit the outlet of the liquid. The passage 24 from the valve 18 communicates with a passage 23 at a higher level to prevent drip at the nozzle 20 at the end of spraying.
Patent GB-712035-A (GB)
Title: Filter device for purification of drinking water and other beverages
IPC: C02F1/42
Filed: 1950-10-26
Abstract: 712,035. Liquid filters; water purifying. LABORATORIUM FUR ADSORPTIONSTECHNIK GES. Oct. 26, 1950 [Nov. 14, 1949], No. 26113/50. Class 46 A filter device for the purification of drinking water or water intended for the preparation of beverages, and particularly for the dechlorination and freeing of such water from odours comprises a vessel 1 of moderate size, such as a beaker, with a permeable bottom and a cubic capacity of up to 2 litres, and a layer of active carbon 2 located in the lower part of the vessel and occupying a volume not greater than 30 per cent of the capacity of the vessel the carbon layer being contained between two perforated surfaces and consisting in a filling or a permeable packing unit insertable into the lower end of the vessel. The packing unit may be so shaped as to be held in the open bottom as shown in Fig. 3. As shown in Fig. 6 the permeable carbon cartridge 2 is adapted to screw into the lower open end of the vessel as indicated by references 8 and 9. Paper filter discs of different porosities may be inserted in any number, e.g. on the inner surfaces of perforated plates sandwiching the carbon layer 2, to regulate the speed of through flow of the water. The vessel 1 itself as well as the envelope for the carbon unit may consist of water-proof paper, e.g., paraffined paper, compressed cellulose or synthetic resins so that it can be discarded when the carbon is exhausted. The vessel may be provided with an annular supporting edge 6, Fig. 3, or with a supporting triangle or rod for supporting the vessel in the mouth of a larger vessel to catch the filtered water.