baber/WOPTO huggingface dataset:
Patent GB-972114-A (GB)
Title: Improvements in or relating to electrical capacitors
IPC: H01G4/228
Filed: 1963-05-23
Abstract: 972,114. Capacitors. SIEMENS & HALSKE A.G. May 23, 1963 [May 25, 1962], No. 20551/63. Heading H1M. In an electrical capacitor suitable for high pulse loading, each of the capacitor plates is compositely formed by a plurality of electrically connected metallic layers separated by insulating layers, portions of corresponding faces of the metallic layers being exposed in successively stepped relationship at one end of the capacitor and being interconnected by a metal endcontact coating applied to cover the exposed portions. Fig. 1 shows the layers constituting one plate of the capacitor. Dielectric foils 3 and 4, which are preferably paper strips, are each covered with regeneratively thin metallic layers 1 and 2 which are interconnected in parallel with each other when metal end-contact 5 is sprayed on. The plate may be rolled with a second plate to form a tubular capacitor with the end contacts 5 applied to the axial ends. Layers 1 and 2 are preferably formed by vapour deposition on strips 3 and 4, and contact 5 is preferably formed by spraying in a direction oblique with respect to the stepped exposed portions of the metal layers. In a modification, Fig. 2 (not shown), layers 1 and 2 are each coated with varnish on which a further metal layer is deposited.
Patent GB-710812-A (GB)
Title: Selenium rectifiers
IPC: H01L21/108
Filed: 1952-08-15
Abstract: A selenium rectifier has a barrier layer between the selenium and the counter electrode consisting of a polyamide.  The layer is derived from a lacquer solution which is deposited on the selenium and comprises 4-7 per cent. nylon, 65-75 per cent. isopropyl alcohol, 10-16 per cent. water and 7-12 per cent. furfuryl alcohol which is mixed with a carrier comprising 1 1/2 -4\ba1/2 parts (by volume) of alcohol with 1/2 to 1 1/2 parts of nitro-methane.  Ammonium hydroxide is then added to the mixture to adjust the pH value to approximately 7. The completed rectifier may be subjected to an electroforming treatment.
Patent GB-701906-A (GB)
Title: Improvements in and relating to sockets for radio valves and like devices
Inventor: LOWTHER OLIVER PETER
IPC: H01R33/76
Filed: 1950-08-21
Abstract: 701,906. Holders for thermionic valves. McMURDO INSTRUMENT CO., Ltd. Aug. 21, 1951 [Aug. 21, 1950], No. 20665/50. Class 38 (1) A valve-holder contact 12 comprises a resilient strip having a slot 15 extending from one, circular end 17 over a portion of its length, said slotted portion being corrugated and the end 17 bent perpendicularly to the strip. The slot 15 is widened at the end 17 to pass freely a valve pin which is gripped by the edges of the narrower part of the slot. Fig. 6 shows a holder comprising an insulating body 25 having contacts as described above located in holes 32, the ends 17 of the contacts being received in circular enlargements 33 and the unslotted ends 13 passing through T-shaped slots in the bottoms of the holes to form soldering tags. Tongues 23 cut out from the ends 13 engage the lower face of body 25 and prevent accidental removal of the contacts. A central tubular earth contact 30 is provided in the holder.
Patent GB-1535394-A (GB)
Title: Knitting machines
IPC: D04B15/82
Filed: 1976-05-19
Abstract: 1535394 Knitting machine WIRKMASCHINENBAU KARL-MARX-STADT VEB 19 May 1976 [23 May 1975] 20689/76 Heading D1C In a flat knitting machine with a circulating carriage, groups of displacing elements 18 are provided to displace needles 20 into an inoperative position, displacing members 12 associated with each group of elements being provided on the carriage which are displaced by a cam profile 6 to displace their associated groups of elements and hence the needles 20 associated with these. Cam profile 6 is formed on a toothed member 5 which engages on pinion 4 rotated by a slider 3 operated by the knitting machine control. Three guide bolts 8 with recesses 10 engaging profile 6 are slidable in housing 9 perpendicular to member 5 carry at their lower ends plates 11 carrying cambers 12 biassed upwardly by springs 21, the outer plates 11 having pivotable connecting members 14 locked in position relative to middle plate 11 by balls 15 urged into recesses 16 in plates 11. Bars 12 act on the butts of elements 18 mounted in an auxiliary bed 17 and these act on knitting needles 20 to lower them so that their butts do not engage the knitting and do not knit.
Patent GB-204816-A (GB)
Title: Improvements in machines for testing the strengths of materials
IPC: G01N3/08
Filed: 1922-07-31
Abstract: 204,816. Eagles, J. July 31, 1922. Butt joints.-A fluid-tight joint between the two plates 30, 31 of an elastic chamber, used in a testing-machine, to transmit the load, is formed by means of a ring 34 brazed or soldered in grooves 32, 33 in the plates, bolts 35 being provided to protect the joint. The ring may be integral with the upper plate.
Patent GB-620124-A (GB)
Title: Improvements in and relating to carburetters for internal combustion engine
IPC: F02M7/20
Filed: 1945-08-14
Abstract: 620,124. Spray carburetters. SOC. D'ETUDES DE CARBURATION POUR L'AUTOMOBILE ET L'AVIATION S.E.C.A.A. Aug. 14, 1945, No. 20884. Convention date, Oct. 15, 1943. [Class 7 (iii)] In a carburetter having the fuel supply to the jet 8 controlled according to atmospheric pressure and intake manifold pressure by two capsules 15, 17 controlling needle valves 13, 14, the mixture strength is also controlled according to the temperature of the intake air by a device 20 separate from the capsules. The capsule 17 is enclosed in a chamber 18 subject to pressure at the outlet of compressor 3 through the pipe 19, and the capsule 15 is subject to changes in atmospheric pressure through the pipe 16 leading to a chamber 27 having a calibrated orifice 28 and connected by a pipe 26 to the throat of the Venturi 6. A bi-metallic spring 20 carrying a needle 23 controls the size of aperture 25 in the tube 26, an increase in the temperature of the intake air increasing the aperture 25 to lower the pressure in the chamber 10, thus decreasing the fuel supply. In a modification, the capsule 15 is enclosed in a chamber connected to the intake 5 so that changes of pressure in the chamber 10 due to the temperature control do not effect the capsule. The bi-metallic spring may be replaced by. a capsule filled with liquid. Specification 579,334 is referred to.
Patent GB-802940-A (GB)
Title: Improvements in light-sensitive exposure meters
Inventor: LOVEGROVE HENRY JOSEPH
IPC: G01J1/42
Filed: 1956-07-05
Abstract: 802,940. Photographic exposure meters. SANGAMO WESTON, Ltd. Jan. 28, 1957 [July 5, 1956], No. 20894/56. Class 40 (3). A photographic exposure meter is provided with a transistor amplifier and with manual switching means for connecting the amplifier between the light-sensitive cell and the indicating instrument to provide amplified output from the cell when required at low light intensities. The manual switching means comprises a push button H, Fig. 2, which is coupled to a multiple leaf switch S and to a movable scale plate F of the indicating instrument K. In the position shown the photo-cell P is connected directly with the indicating instrument K and its series resistor R1, and a scale plate designated " low " is placed under the viewing window W of the instrument. When it is required to measure very low light intensities the button H is pressed to the right whereby the switch S is operated to connect a transistor amplifier A between the photo-cell P and the instrument K with its series resistor R1, and to connect a battery E to the amplifier for supplying the necessary biasing potentials. Simultaneously a suitably calibrated scale designated " very low " is moved into position beneath the viewing window W. Push button H has a third position to the left of that shown in which a scale designated " high " is placed beneath the window W, whilst the contacts of the switch S remain in the position in which the amplifier A is disconnected. The transistor amplifier is a P-N-P junction type and resistors, Fig. 3 (not shown), are inserted in the leads to the base and emitter electrodes to obtain the proper adjusting potentials, one or both of which resistors may be adjustable.
Patent GB-600792-A (GB)
Title: Improvements relating to oxy-electric cutting
IPC: B23K35/04
Filed: 1945-08-11
Abstract: 600,792. Perforating by fusion. SONDURE ELECTRIQUE AUTOGENE, SOC. ANON.. Aug. 14, 1945, No. 20895. Convention date, Jan. 16. [Class 83 (iv)] A metal electrode for open-air oxy-electricarc cutting of iron and steel has one or more internal channels or passages for a stream of oxygen and a flux coating which is normally non-conducting and serves to liquefy the oxidation products of the cutting operation. The cross-section of the oxygen passages is preferably less than one-quarter of the total cross-sectional area of the metal, and may be from 4 to 20 per cent thereof. The electrode may be made by casting or by folding a metal strip, band or ribbon on itself and then compressing or drawing it. The passage may be circular, triangular, &c. and may be eccentrically disposed.
Patent GB-1202104-A (GB)
Title: Planet-ball stepless speed-changing device
IPC: F16H15/50
Filed: 1968-05-02
Abstract: 1,202,104. Variable-speed friction gear. ASAHI SEIKI KOGYO K.K. 2 May, 1968 [3 Oct., 1967], No. 20919/68. Heading F2D. A steplessly-variable planetary ball friction gear comprises a sleeve 8 slidably keyed at 7 on an input shaft 4 and carrying a pair of inner races 12, 11 respectively fast and slidably keyed thereon with the latter race 11 spring urged at 13 towards the race 12 to provide clamping pressure on a ring of planetary balls 14 which are thus maintained in engagement with a pair of outer races 17, 16, the former 17 being connected to an output shaft 6 whilst the latter is stationary at any set ratio, but is axially moved for ratio change by a screwed ring 19 turned by rotating a worm 27 which turns a worm-wheel 26 fast with the screwed ring 19, axial movement of the outer race 17 serving to vary the planet ball contact points, (Figs. 3 and 4, not shown), and hence the gear ratio. The ball contacting race surfaces may be coned and concave respectively on the inner races 11, 12, and may both be coned on the outor races 16, 17 as shown. The planet balls 14 may be of hollow split construction (Figs. 5 to 8 not shown) and weighted aroung the seam whereby the balls spin with their seams free from contact with the friction races.
Patent GB-222625-A (GB)
Title: Improvements in or relating to the manufacture of honeycomb for beehives
IPC: A01K47/04
Filed: 1923-08-17
Abstract: 222,625. Watson, G. W., and Taylor, Ltd., E. H. Aug. 17,1923. Stream - cutting machines; rolling - machines ; heating cutters..-Honeycombs for beehives are made from sheets 1 of wax, waxed paper, or similar material by forming a rib or ribs 2 on both surfaces, corrugating the sheet on each side of the ribs and superposing the corrugated sheets. The corrugations 3, 4 constitute half-cells of hexagonal or other form and may be placed obliquely to the rib 2, the flat surfaces 3 of the corrugations of adjacent sheets lying in contact and adhering when the sheets are pressed together. A long sheet of wax &c. from a roll 7 is drawn between rollers 8, 9 that form ribs thereon and then between rollers 13, 14 that corrugate the intermediate portions. An endless belt 20 carries the sheet beneath a knife 49 which may be heated by the circulation of fluid through a carrier 48 or by electricity. The detached part of the sheet rests upon ledges 27 that give way against a spring or gravity, when a plate 44 operates to press the sheet down upon those previously cut lying on a table 26. The pressure applied is maintained constant by means of a submerged float 31 supporting the table 26, the upright 30 being of sufficient cross-section to compensate by further immersion for the weight of each sheet added to the table 26. The float is prevented from rising when the plate 44 is lifted, by a pawl 35 and ratchet 36.
Patent GB-977003-A (GB)
Title: Improvements in or relating to semi-conductor arrangements
IPC: H01L21/205
Filed: 1963-05-24
Abstract: The main invention is modified in that the stack of wafers 4 is disposed vertically in the reaction zone, e.g. a quartz tube 3, and the temperature gradient formed along the stack is such that the upper end of the stack is at a higher temperature, e.g. 1190 DEG  C. for silicon wafers, than the lower end, e.g. at 1140 DEG  C., so preventing thermal movement of the reaction gas, e.g. SiCl4 in H2 carrier gas. As shown, an electric resistance furnace 2 having a winding 2a may be used to provide the necessary decreasing temperature gradient in the lower region of the tube 3 in which lie the wafers 4. <PICT:0977003/C1/1>ALSO:<PICT:0977003/C6-C7/1> The main invention is modified in that the stack of wafers 4 is disposed vertically in the reaction zone, e.g. a quartz tube 3, and the temperature gradient formed along the stack is such that the upper end of the stack is at a higher temperature, e.g. 1190  DEG C. for silicon wafers, than the lower end, e.g. at 1140  DEG C., so preventing thermal movement of the reaction gas, e.g. SiCl4 in H2 carrier gas.  As shown, an electric resistance furnace 2 having a winding 2a may be used to provide the necessary decreasing temperature gradient in the lower region of the tube 3 in which lie the wafers 4.
Patent GB-864255-A (GB)
Title: Improvements in or relating to gramophone record presses
Inventor: DUNN JOHN WILLIAM
IPC: B30B7/02
Filed: 1956-07-06
Abstract: 864,255. Moulding gramophone records. ELECTRIC & MUSICAL INDUSTRIES Ltd. July 8, 1957 [July 6, 1956], No. 20952/56. Class 87(2). The upper platen 4 is moved downwards, to press the gramophone disc between it and the lower platen 3, by fluid pressure which forces a ram 11 out of a cylinder 12, the downward movement being transmitted through a crossbar 10 and rods 5 to trunnions 8 which pass through bearings in the rods 5 and enter guides 9 in the frame 1. To maintain the platen horizontal as the press closes the guides 9 have plates 21, Fig. 6, spaced to form channels 22 between their edges, and in the channels slide flats 23 formed on the ends of the trunnions. Angular movement is imparted to the upper platen when the press is open by turning the trunnions by means of a pneumatic piston and cylinder arrangement, the cylinder 26 of which is pivotally mounted at 27 to accommodate the vertical movement of the platen. The angular movement is limited by an inclined abutment 28 on one of the plates 21. For pressing two records simultaneously a press may have a lower fixed platen and intermediate and upper movable platens, the intermediate platen being angularly moved when the press is opened.
Patent GB-751564-A (GB)
Title: Improvements in or relating to electrical circuits for telephone systems
Inventor: SCHMIDT KENNETH HENRY
IPC: H04M1/68
Filed: 1954-07-19
Abstract: 751,564. Cables. RESEARCH PRODUCTS, Inc. July 19, 1954, No. 20960/54. Class 36. [Also in Group XXXVII] A telephone cable having a plurality of pairs of conductors 1 is enclosed within two conductive foil wrappings 3, 5 separated by insulation 4, the foil 5 being helically applied in spaced convolutions. The ends of the foils are connected together at one end of the cable, preferably through a resistance-capacity unit 17, and at the other end are connected to an indicator circuit which operates an alarm if the foil 5 is cut or if a short-circuit is established between the two foils (see Group XXXVII).
Patent GB-475677-A (GB)
Title: Improvements relating to metal-framed windows and balconies
IPC: E06B7/28
Filed: 1936-07-29
Abstract: 475,677. Window balconies. HOPE & SONS, Ltd., H., and GARRATT, H. H. July 29, 1936, No. 20965. [Classes 20 (i) and 20 (ii)] A metal window frame has combined with it ar outside balcony or platform so that the frame and platform are mounted in position in the wall of a building as one piece. The window frame a is provided witt brackets c to which is secured a window platfom comprising a bracket f guard rails h, g, and inclinec tie bars i. The platform i: provided with a grid floor ing d, and adjacent ends o: platforms may be intercon nected. The platforms of different storeys may be connected by ladders or stairways.
Patent GB-1208601-A (GB)
Title: Polyoxyalkylene derivatives of propargyl alcohol
Inventor: BATTY JOHN WOOLLEY
IPC: C23F11/04
Filed: 1967-05-05
Abstract: 1,208,601. Polyoxyalkylene derivatives of propargyl alcohol. IMPERIAL CHEMICAL INDUSTRIES Ltd. 23 April, 1968 [5 May, 1967], No. 21024/67. Heading C2C. [Also in Divisions C3 and C7] Novel polyoxyalkylene derivatives of propargyl alcohol of general formula where R 1  and R 2  each independently represents a hydrogen atom, a substituted or unsubstitued alkyl group containing from 1 to 4 carbon atoms or an aryl group, and n is an integer of from 2- 30, wherein the oxyalkylene groups may be the same or different providing that when the oxyalkylene groups are the same only one of R 1  and R 2  is a hydrogen atom and in the latter case being in the form of a block or random copolymer, e.g. of ethylene oxide and propylene oxide, are prepared by condensing propargyl alcohol with one or more alkylene oxides of formula in the presence of a catalyst.
Patent GB-881122-A (GB)
Title: Improvements in or relating to the packaging of electric lamps
IPC: B65D5/54
Filed: 1958-07-01
Abstract: 881,122. Packages; cartons. ASCOT LAMPS & LIGHTING Ltd., and DESHAW, Z. July 16, 1959 [July 1, 1958], No. 21093/58. Classes 18 and 94(1). Electric lamps are packaged in layers in a carton which may be divided by cutting &c. between adjacent layers to produce smaller packages as required. The layers may be separated by sheets and these sheets be used to close the open ends of the divided containers, or separate flanged covers may be applied. Tear strips, lines of weakening &c. may be provided.
Patent GB-202986-A (GB)
Title: Improvements in interchangeable tooth facings and methods of mounting the same
IPC: A61C13/00
Filed: 1923-08-20
Abstract: 202,986. Levy, A. S. Aug. 28, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Teeth, artificial.-A porcelain artificial tooth facing 2 is formed integrally with a root portion 1 adapted to be embedded in the alveolar process and and is interchangeably connected to a cusp portion 9 permanently secured to adjacent natural teeth or to a bridge. The combined facing and root is preferably connected to the cusp 9 by means of a pin 7 having a shank 8 embedded in the cusp and engaging an undercut groove 5 formed in an inclined surface 3 on the root portion and extending at 6 into the facing portion 2. In a modification the pin is secured to the root and the groove is formed in the cusp. The surface 3 is approximately parallel to the labial or buccal portion of the root 1 where it engages the upper part of the cavity in the alveolar process so that the facing may be slid into position as indicated by the dotted lines joining Figs. 1 and 2. The combined roots and facings are produced in standard shapes, the root portion 1 being highly glazed, and any necessary grinding is done at the occlusal end of the facing. Reference is made to a known process wherein a root portion is made by the dentist and baked to a porcelain facing, the whole being permanently secured to the cusp which is then secured to a bridge.
Patent GB-934235-A (GB)
Title: Improvements in or relating to dental instruments
IPC: A61C5/62
Filed: 1961-06-12
Abstract: 934,235. Dental instruments. D. G. SMITH. June 12, 1962 [June 12, 1961], No. 21130/61. Class 81 (2). An instrument for applying filling material to a tooth cavity has a plunger for forcing the material out of a bore in the working tip of the instrument and means for vibrating the plunger. In one form, the filling material is received in the bore 5 of the working tip 4 and, when required for a filling operation, it is pressed out by a plunger 6 urged forward by a slidable finger member 9. A vibrating member 8 is, however, interposed to impart a longitudinal vibration to the plunger, and may be mechanically, fluid or electrically driven. The working tip 4 is pressed into the enlarged end 3 of the instrument and may be readily replaced if a tip of different cross-section is required. In another form of the instrument a supply of filling material is held in a reservoir compartment from which it is forced through lateral ducts into the bore of the working tip by means of a spring-loaded plunger, the action of the latter being locked during actual filling operations.
Patent GB-890797-A (GB)
Title: Improvements in or relating to alternating current signal receiving circuits
Inventor: MORGALLA NORBERT WALTER
IPC: H04Q1/448
Filed: 1958-07-03
Abstract: 890,797. Voice immunity circuits. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. July 2, 1959 [July 3, 1958], No.21275/58. Class 40 (4). A series connection of a slow-to-operate and fast release circuit with a fast operating but slow-to-release circuit acts as a band pass filter which cuts off when the input includes noise or speech. As shown in Fig. 2, a sinusoidal input of 150 c.p.s., or buzzer tone with a fundamental of 150 c.p.s., is applied to normally conducting transistor TX6 which produces a square wave output. By adjusting the level at which TX6 cuts off the harmonic content of the input may be eliminated. Normally, non-conducting transistors TX7, TX8 comprise a slow-to-operate circuit with TX7 following the square wave input but TX8 conducting only after capacitor C2 has charged sufficiently. Thus TX8 conducts only for inputs with a frequency less than that which provides a period of twice its switching-on time. Normally conducting transistors TX9, TX10, cut off immediately in response to input to TX9. At the end of an input TX9 conducts at once but TX10 will conduct only after the delay imposed by capacitor C3. A frequency exists below that which just operates TX8 which pulses TX10 just often enough to keep it cut off. A band of frequencies is therefore defined above which TX8 does not conduct and below which the output of TX10 is constantly interrupted. For signals in the band the output of TX10 is continuous. Transistors TX11, TX12 constitute a slow to operate circuit which, with a time constant of one second guards against spurious or transient signal inputs. With a persistent in-band signal transistor TX13 cuts off normal conduction and drives TX14 to operate relay RA. A narrow signal frequency band is obtained by the use of two slow-operating and slow release circuits connected in parallel as shown in Fig. 3 where corresponding transistors are given the same numbers as in Fig. 2. The upper transistor chain produces an output for signals below a frequency F1 while the lower transistor chain produce an output for signals below a frequency F2, less than F1. The output of the upper transistor chain operates a relay RB only so long as there is no output from the lower transistor chain to make transistor TX24 conduct and clamp transistor TX25. Specification 888,843 is referred to.