baber/WOPTO huggingface dataset:
Patent GB-1191215-A (GB)
Title: Printed Circuit Manufacture
Inventor: GOTTFRIED WILLIAM ADOLPH
IPC: H05K3/06
Filed: 1968-05-31
Abstract: 1,191,215. Printed circuits. RCA CORPORATION. 31 May, 1968 [2 June, 1967], No. 26235/68. Heading H1R. In a method of producing a printed circuit by a photo-etch process any imperfections formed during the application, exposure or development of an initial layer of photo-resist which would result in pin-holes being formed in the circuitry during etching is corrected by the application of an additional layer of photoresist which is subsequently exposed and developed. A copper-coated dielectric substrate is dip-coated with a positive resist and then exposed through a metallized glass mask having delineated thereon an image of the desired circuitry. After exposure the substrate is subjected to a developer and the exposed photo-resist removed. To overcome the possibility that pin-holes may have formed in the unexposed photo-resist a second coating of photo-resist is then applied and exposed and developed to form the same photo-resist pattern as the first layer. The exposed copper layer is then etched away to leave the required conductor pattern. Different photo-resist layers may be used and positive, negative or combinations thereof photo-resists may be used.
Patent GB-1106287-A (GB)
Title: Semiconductor devices
IPC: H01L23/488
Filed: 1966-06-13
Abstract: 1,106,287. Semi-conductor devices. SIEMENS-SCHUCKERTWERKE A.G. 13 June, 1966 [11 June, 1965], No. 26335/66. Heading H1K. A semi-conductor body containing silicon as a component is contacted by fusing it to a contact member of molybdenum disilicide, tungsten disilicide, or a higher silicon content variant of, these materials, which is covered, except for the contact region, with a coating of silicon oxide. As shown, a thermoelectric device comprises two limbs 4, 5 of germanium-silicon fused to contact members 6, 7 and 8 of molybdenum disilicide each of which is coated with a layer 9, 10, 11 of silicon oxide. The contact members are prepared by rapidly heating a preshaped body of molybdenum silicide to about 1500 C. in an oxidizing atmosphere. Molybdenum oxide evaporates from the surface leaving a skeleton layer of silicon which is oxidized to form an insulating glaze. After cooling, the glaze is mechanically removed from the contact areas to which the semi-conductor bodies are fused. Foil or gauze inserts 12, 13, 14, 15 of molybdenum (or tungsten if the contact members are of tungsten disilicide) may be placed between the semi-conductor bodies and the contact members before forming the fused contacts. One of the germanium-silicon bodies 4, 5 may be doped with boron, gallium or indium, and the other may be doped with phosphorus, arsenic or antimony. Heat exchangers 2, 3 are applied directly to the insulated surfaces of the contact members.
Patent GB-868722-A (GB)
Title: A tiltable container attachment for a fork-lift truck
IPC: B66F9/19
Filed: 1958-08-16
Abstract: 868,722. Shovelling machines. DOHERTY, J. E. Aug. 10, 1959 [Aug. 16, 1958], No. 26407/58. Class 68(1). [Also in Group XXX] A shovel attachment for a fork-lift truck comprises a shovel bucket 11 pivoted at 14 on a pair of sleeves 10 adapted to receive the tines 17, a manually releasable spring loaded catch 21, 23, 24 which locks the bucket to the sleeves, and a pair of bucket movement limiting slotted links 13 whicn are pivoted on the sleeves, and which engage pins secured to brackets 27 on the bucket. The sleeves are provided with apertures 20 to allow any foreign material to be ejected from them on insertion of the tines.
Patent GB-878285-A (GB)
Title: Improvements in hose reel assemblies
IPC: B65H75/44
Filed: 1959-07-31
Abstract: 878,285. Hose reels. JONES & CO. (ENGINEERING) Ltd., SAMUEL, and PHILLIPS, C. H. July 15, 1960 [July 31, 1959], No. 26443/59. Class 99(2). A spring loaded valve 1 is opened on rotation of a hose reel 6 by a cam 10 which is rotated on initial rotation of the hose reel by a stud 20 on the hose reel engaging a spring loaded lug 14 which is pivoted to the cam plate and which, after rotation of the cam through a predetermined angle, is withdrawn from driving connection with the stud 20 to allow further rotation of the hose reel without effect on the valve. As shown, the valve 1 is mounted on a wall bracket 2 and is connected at its inlet 3 to a water supply and at its outlet 4 to a hose 5 coiled on the reel 6. The cam is mounted on a stub shaft 9  projecting from the wall and carries a pair of lugs 14 and stops 12, the latter engaging a fixed stop 13 on the wall to limit the cam movement. The lug 14 moves in a circular path of radius less than that of the stud 20 and after initial clockwise movement of the cam and engagement of the stops 12, 13 one of the lugs 14 is moved to a position away from the path of the stud 20 so that further reeling off of the hose is permitted. When coiling the hose the stud 20 contacts the other lug 14 and rotates the cam to close the valve.
Patent GB-425697-A (GB)
Title: Improvements in or relating to rotary cutters for paper, card and like materials
IPC: B26D7/26
Filed: 1933-09-26
Abstract: 425,697. Cutting paper, card, and like material. MILLER, P. S., and MILLER, F. A., Hitchin Road, Luton. Sept. 26, 1933, No. 26510. [Class 31 (i)] In a rotary cutter for sheet material comprising two overlapping circular knives mounted in holders on parallel shafts and having means for adjusting the pressure between the knives, one knife, carried by the shaft z<1>, is passed over a reduced portion of its holder and pressed against the other knife by a ring e<1> bearing resilient projections g, and a nut k screwed on to the reduced portion of the holder. The members g comprise arcuate strips of springy metal, struck to the same radius as the ring and proprojecting at an angle to its face in notches f. The pressure on the knife is adjustable from zero upwards until, if desired, the knife is held rigidly against the shoulder b of its holder, by means of the nut k which may be locked in any position by a set-screw l, the screw-threads being relieved at that part on which the setscrew bears. The other knife, carried by the shaft z, may be rigidly held, as shown, against the shoulder b on its holder by a plain ring e and a nut k, which may also be locked by a set-screw l, or the knife may be resiliently held in the same manner as the knife on the shaft z<1>.
Patent GB-1263618-A (GB)
Title: The dyeing of polyamide resin articles
Inventor: OTTAVIANI QUINTINO
IPC: D06P3/24
Filed: 1969-05-23
Abstract: 1,263,618. Dyeing polyamide resin articles. MONTECATINI EDISON S.p.A. 23 May, 1969 [27 May, 1968], No. 26540/69. Heading B6G. Polyamide resin articles are dyed to give a discontinuous or shaded colouring effect resembling tortoiseshell or a marble effect by dipping the article into an aqueous dyeing bath acidified to pH 3-6 containing at least one dispersed dye and having on its surface a small quantity of oil sufficient to cover at most ¥ of the surface of the dyeing bath. Polyamide resin articles mentioned are spectacle frames, hair clips, bag handles, combs. Suitable dyes are azo and anthraquinone compounds. The oil may be a mineral oil, a vegetable or animal fat oil, or an artificial or synthetic oil insoluble in water. The articles may be made of polycaprolactam. The article may be rotated whilst it is dipped in the dyeing bath.
Patent GB-1397445-A (GB)
Title: Electrostatographic developer
Inventor: HAGENBACH R J
IPC: G03G9/113
Filed: 1972-06-08
Abstract: 1397445 Developer XEROX CORP 8 June 1972 [10 June 1971] 26753/72 Heading G2H A dry developer comprises at least 95.0 weight per cent (based on the weight of developer) of carrier heads having surfaces comprising tonereceiving recesses separated by nodules and having an average size in the range of 50-1000 microns and toner particles electrostatically clinging to the surfaces of the heads. The heads may be metal agglomerates (e.g. steel, copper, nickel, aluminium or brass) or refractory materials (e.g. carbides, nitrides, ceramics or glasses). A binder (e.g. sodium silicate, synthetic resins, waxes, dextrin, esters of unsaturated fatty acids and natural or synthetic adhesives) may be employed to aid agglomeration. The agglomerate may be hardened by heating. The heads may be coated with a film-forming polymer (examples are given). The toner may comprise styrene-n-butyl methacrylate copolymer, a polyvinyl butyrol or carbon black.
Patent GB-616482-A (GB)
Title: Improvements relating to the separation of mineral mixtures
IPC: B03B5/32
Filed: 1946-09-05
Abstract: In a method of separating mineral particles into two fractions of different densities, a slurry of the particles with a liquid of density between that of the two fractions or not substantially less than that of the lighter fraction is treated in a centrifugal separator having a rotary casing against the inner wall of which a conveying device rotates about the axis of rotation but at a different speed whereby the heavy fraction with a minor proportion of the separating liquid moves outwardly and is discharged at one end of the separator, while the lighter fraction with the major proportion of the liquid is discharged at the other.  A separator of the type described in Specification 479,872 is suitable.  The light fraction after dilution may be treated in a similar separator to obtain the clean light fraction or both light and heavy particles may be obtained by separation according to particle size, e.g. by the use of a sieve.  The medium may be returned to a mixing device and re-used.
Patent GB-980412-A (GB)
Title: Tubular heat exchanger element
Inventor: WOOLLEY ERIC MAURICE
IPC: F28F1/36
Filed: 1961-07-24
Abstract: 980,412. Heat exchanger tubes. HEAD WRIGHTSON & CO. Ltd. July 23, 1962 [July 24, 1961; July 25, 1961], Nos. 26802/61 and 26973/61. Heading F4S. A tubular heat-exchange element comprises a tube 1 formed on its inner surface with a series of circumferentially spaced splines or ribs 6 in which is arranged on or more helical guide plates 4 to restrict the flow path therethrough. As shown, the guide plates 4, together with a central support member 3, form a central core 2 which can be inserted into tube 1.
Patent GB-853895-A (GB)
Title: Relay protection means
IPC: H02H7/08
Filed: 1958-08-21
Abstract: 853,895. Protective cut-out arrangements. ALLMANNA SVENSKA ELEKTRISKA A.B. Aug. 21, 1958 [Aug. 26, 1957], No. 26873/58. Class 38 (5). A synchronous machine is protected against sudden changes in load by an arrangement responsive to sudden changes in the power supplied to or from the machine. In Fig. 1, a balanced beam relay 4 has two co-operating elements 5, 6 energized from current and voltage transformers 7, 8 in accordance with the two wattmeter method, and one opposing element 9 energized from a D.C. source through a motoroperated potentiometer 10. When the power supplied over the conductors 3 changes, the change in the energization of the elements 5, 6 unbalances the beam and closes contacts 12, 13 or 12, 14 to cause the motor 11 to drive the potentiometer in the appropriate direction to restore the balance of the beam if the variation in the power supplied is normal. If the variation is abnormal, then balance is not restored before contacts 12, 15 or 12, 16 are closed to complete a tripping circuit. In a further arrangement, a balanced beam device similar to that of the relay 4 adjusts a variable coupling condenser 23, Fig. 3, to control the output of a pentode triode valve 21. This valve energizes the opposing element 20 of the balanced beam device and mutually opposing coils 27, 28 of a polarized relay 26. A capacitor 29 is connected across the coil 28 so that a sudden change in the output of the valve results in unequal energization of the coils 27, 28 and the closure of contacts 30. Fig. 2 (not shown) illustrates an arrangement in which the relay 4 of Fig. 1 has its element 9 energized by means of a balanced beam device and valve arrangement similar to that of Fig. 3, the movements of the balanced beam device being mechanically damped.
Patent GB-391816-A (GB)
Title: Improvements relating to article packages and method and apparatus for making the same
IPC: B65B19/22
Filed: 1931-09-26
Abstract: 391,816. Packing cigarettes. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (American Machine & Foundry Co. ; 511, 5th Avenue, New York, U.S.A.) Sept. 26, 1931, No. 26899. [Class 94 (i).] A package comprises an inner article container and an outer wrapper of transparent cellulosic material folded thereabout to provide an overlapping flap portion sealed along one of the narrow ends or sides of the package, the flap portion being provided with a tearstarting agency consisting only of a slot or notch in the edge thereof extending inwardly from the edge a distance not exceeding the width of the sealed overlap of the flap. In the package shown in Fig. 21, two V-shaped notches 24 are provided in the two sealed end flaps 12, 13 ; the tear may proceed along the line 25 and, striking one of a series of nicks 17, across the seam 11. The flap 12 may be provided with an unsealed tab. Fig. 1 shows a machine for producing such a package. A web of wrapping material is drawn intermittently from a reel R, over a roller 54 mounted on springs 55, and is clamped between two plates 40, 44. The plate 40 is fixedly mounted on a bracket 23a and carries pins on which the rubber clamping- plate 44 reciprocates horizontally. A device for producing a V-shaped notch, such as 24, and nicks, such as 17, comprises a cutting die 33 which co-operates with a female die on the bracket 23a, and a series of horizontallymounted razor-blades 30, the die and the blades being mounted on lugs 28 carried by a sleeve 20a sliding on rods 21a fixed to stationary brackets 22a, 23a. The sleeve 20a is reciprocated via rods 36, 38, 39. The notched and nicked web passes over idlers 58, 59 and between intermittently-moving feed rollers 60, 61, past a cutting device 63, which severs along the line a-a, Fig. 22. The severed strip is then pushed by a packet A through wrapping mechanism 70, 71, 72, 74 on to an elevator 73. The notching and nicking device may comprise two rollers geared together, one being equipped with cutting teeth and the other being made of a suitable resilient material.
Patent GB-1036418-A (GB)
Title: 19-alkyl-steroids and process for their production
IPC: C07J71/00
Filed: 1963-07-08
Abstract: The invention comprises compounds of the formula <F\1> (wherein R is hydrogen, hydroxy or acyloxy; T is hydrogen, a -hydroxy, a -acyloxy, a -methyl or b -methyl; or T and R together are dialkylmethylenedioxy; R1 is hydrogen or acyl; and X is alkyl; the alkyl groups each containing at most 8 carbon atoms, and the acyl groups being derived from hydrocarbon carboxylic acids of at most 12 carbon atoms which may be substituted) and their preparation by refluxing the 3-tetrahydropyranyl ether of a corresponding 20-ethylenedioxy-19-alkyl-D 5-pregnen-3b -ol19-one in a high boiling solvent with hydrazine hydrate in the presence of potassium hydroxide to produce the 3-tetrahydropyranyl ether of the corresponding 20 - ethylenedioxy - 19 - alkylD 5-pregnen-3b -ol and subjecting this to acid hydrolysis, and, if desired, acylating the 3hydroxy group with an appropriate acid anhydride in pyridine.  16a ,17a -ketonides may be hydrolysed with strong acid to the corresponding diols, which may be esterified by conventional procedures.  Examples are given.
Patent GB-222334-A (GB)
Title: Improvements in crystal rectifiers for use in wireless telephony
IPC: H01L21/00
Filed: 1923-10-27
Abstract: 222,334. Bowyer, W. J. Oct. 27, 1923. Crystal detectors.-The fine wire 2, of helical or like shape, has, its straight end gripped in a sleeve 4, which may be split longitudinally and attached to the wire by nipping or crushing, thus affording a substantial stem for securing to the holder 6.
Patent GB-705827-A (GB)
Title: Improvements in electrode structures for gaseous discharge devices
Inventor: JR WARD WESTON WATROUS
IPC: H01J17/04
Filed: 1952-10-27
Abstract: 705,827. Thermionic valves. CHATHAM ELECTRONICS CORPORATION. Oct. 27, 1952, No. 26952/52. Class 39(1) An electrode structure for use in a thyratron comprises a cathode for emitting electrons, a shielded-anode 14, a control electrode I positioned between the anode and cathode for initially controlling the flow of electrons to the anode, and a coneshaped baffle 37 positioned between the cathode and the control electrode, the baffle having its larger end portion adjacent the control electrode and an inclined surface for directing the flow of electrons towards the periphery of the control electrode. The cathode may be provided with a heat shield 25 supporting two baffles 32, 33 which prevent heat being radiated from the cathode to the control electrode; the cone-shaped baffle 37 may be supported from the baffle 33 as shown, or may be supported from a baffle 16 arranged in front of the control electrode. The baffle 16 may be attached to the top of the baffle 37 instead of being supported from the control electrode.
Patent GB-795621-A (GB)
Title: Improvements in or relating to a machine for feeding sheets
IPC: B65H3/12
Filed: 1955-09-21
Abstract: 795,621. Feeding sheets. LABOMBARDE, P. D. Sept. 21, 1955 [March 16, 1955], No. 26967/55. Class 100(1) Pile supports; sheet - separators. Sheets are separated sequentially from the bottom of a stack 30 by combined friction and suction separators, such as 66, 67, which reciprocate in a straight line in the plane of the bottom sheet 36 and, by friction and suction, grip and forward the bottom sheet past an adjustable gate 54, 60 to the nip of forwarding rollers 48, 49; on the return stroke compressed air is supplied to the separators to provide a cushion of air between them and the bottom sheet. The apparatus forms' part of a paper box folding machine, and is driven in synchronism therewith by a chain 26 and sprockets. The stack 30 of sheets is confined in a magazine comprising side plates 29, an inclined rear plate 32, a front plate forming the vertically-adjustable gate 54, 60, and a base including two adjustable smooth side rails and a central support 42 provided with sets of rollers 43. There are four separators 66, 67 and 64, 65 (not shown) arranged in pairs on a carriage 74 slidable longitudinally in grooves in the support 42. The carriage is reciprocated by the engagement of a pin thereon with a slot in one end of a bell-crank lever 81 which is oscillated about a pivot shaft 83 by a track cam 85 secured to a driven shaft 87. Each separator has a flat-faced annular friction rim of rubber &c., and a central opening communicating with a flexible pipe connected to a distribution pipe 98. The pipe 98 is connected by a pipe 101 to a control valve 103 provided with a piston 112 having a follower 113 in contact with a cam 115 secured on the shaft 87. The valve 103 is connected also to a vacuum tank 108, and to a source of compressed air by pipes 107, 110, respectively. The arrangement is such that the separators 64-67 are connected by the valve 103 alternately to the sources of vacuum and compressed air on the forward and return strokes, respectively. In each revolution of the shaft 87 causing the carriage to reciprocate forwardly and rearwardly, the full suction is on from just prior to the beginning of the forward stroke to near the end of the forward stroke representing an angular movement of 120 degrees. For the next 15 degrees the suction is gradually released, and during the next 15 degrees the air pressure is gradually applied. At this point the carriage starts its rearward stroke and full air pressure remains on for about 180 degrees. During the next 15 degrees the air pressure is gradually released, and for the next 15 degrees the suction is gradually applied. The chain 26 engages sprockets on the shaft 87 and shaft 91 of.the feed roller 49. Specification 400,816 is referred to.
Patent GB-1253545-A (GB)
Title: Improvements relating to oil loading and discharge hose
Inventor: DUNNET GEORGE
IPC: F16L11/08
Filed: 1968-06-06
Abstract: 1,253,545. Buoyant pipes. UNIROYAL Ltd. 27 Aug., 1969 [6 June, 1968], No. 26997/68. Heading F2P. A hose for loading and discharging oil on and from oil tankers is rendered floatable in sea when itself is full of sea water by a covering of materials which are not vulcanized after application to the hose. The covering may be of foamed natural or synthetic rubber or closed cell polyvinyl resin, e.g. an expanded copolymer of nitrile rubber and p.v.c. As shown, a hose 1, formed of plies of synthetic rubber, fabric and wire, is surrounded by three plies 3, 4 and 6 of natural rubber sponge, each ply being a helically wound strip of the sponge. The inner ply 3 is only applied adjacent the two ends of the pipe. Nitrile rubber cement is used between adjacent plies. A ply 5 of nylon fabric is located between plies 4 and 6. An outer ply 7 of either nylon fabric impregnated with p.v.c. and nitrile rubber, cured under infra-red heaters, or plain nylon coated with polyurethane or polyglycol is provided.
Patent GB-1534786-A (GB)
Title: Data transmission system
IPC: H04B10/275
Filed: 1976-06-29
Abstract: 1534786 Data transmission systems STANDARD TELEPHONES & CABLES Ltd 29 June 1976 27029/76 Heading G1A In a data transmission system, Fig. 1 fibre optics light guides connect a series of terminals A B C D E F G and H which receive and transmit radiation. Some of the terminals C, E and H act as repeater stations. Each terminal comprises at least one by-pass 57, 59 Fig. 6, to allow a minor or a major portion of the optical power to by-pass the terminal depending upon whether the terminals are repeaters or not. Fig. 1 shows a one-way propagation system. Fig. 6 shows part of a two-way propagation system also Figs. 4 and 5 (not shown). Incoming link 50a of an optical "highway" feeds a coupling 56 and a by-pass optical fibre guide 57, whilst incoming link 51b of another optical "highway" feeds a coupling 58 and a by-pass 59. Couplings 56 and 58 are in turn coupled to a photo-diode receiver 10 by a common short coupling 60. A laser or a L. E. D. transmitter 33 feeds a common short coupling 61 supplying couplings 62, 63 which in turn feed the outgoing links 50b and 51a. Each terminal is allotted a predetermined transmission period in an overall transmission sequence so each terminal has a store 14 feeding the transmission amplifier 34 only during that period. Each terminal transmits an address code signal identifying that terminal, an address code signal identifying the terminal to which it is transmitting data and a signal to be used for gain control. The description discloses a suitable circuit for achieving the above. 1534854 Well logging SCHLUMBERGER Ltd 19 Nov 1975 [19 Nov 1974] 50161/74 Heading G1G In a well logging method, low frequency (e.g. about 3 KHz) waves are among those generated using a pulse 28 of damped sinusoids Fig. 2 so that waves (defined as late arrivals) whose velocity is less than that of direct or mud waves are preferentially enhanced relative to faster waves (defined as early arrivals). The late arrivals 44 Fig. 3 are stoneley or tube waves and are gated out by a time gate 26 and window 60 for subsequent processing and recording. The delay 68 Fig. 3 is estimated for known mud wave velocities. In apparatus claimed; a detector produces a waveform Fig. 3 comprising waves whose wavelength is substantially greater than the borehole diameter.
Patent GB-684525-A (GB)
Title: Device for securing locks and bolts
IPC: E05B63/12
Filed: 1950-11-06
Abstract: 684,525. Locks. ELORZA, B. Z. Nov. 6, 1950 [Nov. 8, 1949], No. 27070/50. Class 44 To prevent the door lock b and keeper plate a being forced apart to release the bolt d e.g. by a crow-bar there is provided a catch c pivoted inside the lock and adapted to turn, as the bolt is shot, to the position shown in Fig. 2 in which it embraces both plates and clamps them together. The catch may be arranged to swing back under gravity to the inoperative position when the bolt is retracted (the bolt d being normally mounted horizontally). Alternatively a spring may be provided to return the catch.