baber/WOPTO huggingface dataset:
Patent GB-1059387-A (GB)
Title: A method for recovering nucleotide and the salts thereof from fermentation broth
IPC: C12P19/30
Filed: 1964-05-15
Abstract: Nucleotides are recovered from fermentation broth by passing the broth through strongly acidic cation exchange resin, eluting absorbed nucleotide with water, passing the eluate through strongly basic anion exchange resin and eluting absorbed nucleotide with mineral acid. The broth may be filtered and/or replaced by an eluate obtained by passing the broth through strongly basic anion exchange resin and eluting absorbed nucleotide with mineral acid.
Patent GB-346235-A (GB)
Title: Improvements in eye-training apparatus
IPC: A61H5/00
Filed: 1930-07-05
Abstract: 346,235. Eye-training apparatus. GREEN, W. and ELLIOTT OPTICAL CO., Ltd., 104, Great Saffron Hill, London., July 5, 1930, No. 20442. [Class 81 (ii).] Apparatus for treating defects of vision comprises a base 10 carrying a pillar 13 to which is pivoted at 18 an L bracket 19 carrying a pair of lenses 27 and stereoscopic pictures 57, to be viewed therethrough. The lenses 27 are carried by plates 26 slidable in guides 25 which are formed by bending over the edges of a plate 24 secured to anglebrackets 21 on the bracket 19. Lateral adjustments of the plates 26 is effected by a screw 28 working in blocks 29 on the plates and the amount thereof is indicated by a pointer 31 on one block in conjunction with a scale on the other block. The pictures 57 are illuminated by a lamp 16 mounted on a separate pillar 12 and are supported in plate carriers 49 rotatably mounted at 50 on plates 48, the rotation being effected by worm gearing actuated by a knurled wheel 59, and being indicated on a scale 61 by a pointer 60. The plates 48 are so mounted, by turning over their edges, as to slide vertically on plates 47 which are themselves adjustable laterally. The vertical adjustment is effected by screws 51 and indicated on a scale 53. The lateral adjustment is effected by a screw 43 passing through a block 40 on the bracket 19 and through blocks 45 carrying the plates 47. Guide rods 44 passing through all three blocks are provided. The lateral adjustment is indicated by a pointer and scale 54. The apparatus is also provided with an adjustable chin rest 14 mounted on a separate pillar 11, a forehead rest 37 and a septum 39 secured to the bracket 19, and with prisms 34 mounted on frames pivoted to the outer corners of the plates 26 and having springs 35 which retain the prisms in position behind the lenses or in a downwardly swung position when not required.
Patent GB-1475021-A (GB)
Title: Camera with transport device for roll film
IPC: G03B1/10
Filed: 1975-05-16
Abstract: 1475021 Film winding PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 16 May 1975 [31 May 1974] 20831/75 Heading G2A In a camera having means for transporting film between a supply spool and a take-up spool, which means is coupled to means for rotating the take-up spool, the arrangement is such that during the first half of the transport more film is transported than is wound on to the take-up spool, and during the second half more film is wound on to the spool than is transported. As shown, the film transport is effected by pushing a rod 10 to the right. This rotates a gear-wheel 7, which engages with a gearwheel 6 fixed to the take-up spool 5, so that this latter is rotated clockwise in the film take-up direction. A coupling rod 11 is fixed to gearwheel 6, so that as the wheel rotates rod 11 executes a reciprocating movement. The end of rod 11 is attached to a member 8 which transports the film to the left by engaging in a perforation thereof. In the reverse movement it slides over the film because its end is bevelled. During the first part of the winding movement, for each revolution of spool 5 a greater length of film is transported by member 8 than is wound on to the spool, so that some slack accumulates. As the film winds on to the spool, however, its diameter increases, so that eventually more film is wound on than is transported. Thus the slack is now taken up, and finally the whole of the film is tightly wound on the spool.
Patent GB-1275024-A (GB)
Title: Laser system
Inventor: DAKSS MARK LUDMER
IPC: H01S3/101
Filed: 1971-04-19
Abstract: 1275024 Lasers INTERNATIONAL BUSINESS MACHINES CORP 19 April 1971 [19 Feb 1970] 20971/71 Heading H1C A laser cavity contains a fly's eye lens and an electro-optic system for transverse mode selection. In Fig. 2, the resonator comprises reflectors 15<SP>1</SP> and 32<SP>1</SP>, and contains lenses 16<SP>1</SP>, 30<SP>1</SP>, and the fly's eye lens 100<SP>1</SP>. The latter is an array of small converging lenses which may be stamped from a single glass or plastics sheet. The lenses 16<SP>1</SP>, 30<SP>1</SP> and 100<SP>1</SP> are positioned so that discrete modes such as 20<SP>1</SP> may be resonated. The active medium produces linearly polarized light due to its Brewster angle ends, and this in combination with a further polarizer 28<SP>1</SP> and an electro-optic KDP sheet 34<SP>1</SP> normally prevents resonator action. When a local field is produced in the KDP sheet by an electron beam 55<SP>1</SP> one of the transverse modes such as 20<SP>1</SP> is resonated because it is no longer attenuated by the polarizing system. Any one of a number of transverse modes corresponding to the lenslets of the fly's eye lens may thus be selected. In Fig. 3, the fly's eye lens is the other side of the KDP layer, and has its surface nearest the electron beam gun reflective to light; its action is as before. Suitable active media are an argon ion laser, a Nd doped YAG, or a hollow cathode ionized mercury laser. The latter comprises a glass tube containing a hollow cathode with a tantalum anode wire at each end. The Brewster windows may be replaced by a separate polarizer. The fly's eye lens avoids the need for focusing the resonated beam on to the KDP, and surface irregularities in the KDP are not important. It is stated that other mode selection devices such as the Kerr-Babinet scanlaser may also use the fly's eye lens in like manner.
Patent GB-700233-A (GB)
Title: Devices for converting mechanical vibrations to electrical variations
IPC: H01L29/00
Filed: 1949-08-12
Abstract: 700,233. Transducers, semi-conductive amplifiers. WESTERN ELECTRIC, CO., Inc. Aug. 12, 1949 [Aug. 19, 1948], No. 21022/49. Class 40 (4) [Also in Group XXXVI] Means for convertingmechanical vibrations into electrical variations comprises a semiconductor amplifier having' at least three electrodes, the contact between one of which and the semi-conductive body being varied in accordance with the vibrations. In a first embodiment (Fig. 1), the semi-conductor amplifier is a block 1 of germanium having emitter and collector electrodes 4 and 5 and a base electrode 6 which may be a plated metal film. The normal sharp point contact of the emitter is replaced by a substantially spherical one of about 2-20 mils. diameter, preferably of carbon or of a silicon compound such as quartz with a tough carbon skin coated thereon. This contact is mounted on one end of a light stiff rod 10 driven by a diaphragm 11. The variations in the pressure of this contact on the surface 2 change the contact area and the spacing between the emitter and collector electrodes and corresponding variations are produced in the collector current. To prevent the output from being noisy, the block surface is smoothly polished either mechanically, electrolytically or both. The same construction may be adapted to act as a reproducer for lateral-cut records by arranging that the contact 4 is varied under the control of a stylus. Fig. 2 (not shown). In the embodiment of Fig. 4 the emitter and collector electrodes 24, 25 are placed on-opposite sides of a block 21 of semi-conductor material with concave surfaces at the thinnest part thereof and a circumferential metal ring 26 serves as the base electrode. The spherical electrode 24 is considerably larger than that of Fig. 1, e.g. 10- 100 mils diameter, but the operation is similar. In the Fig. 5, embodiment for reproducing hill-and-dale records the point of contact of the electrode 24 is altered, but its pressure and contact area are not. Axial movement of the stylus 33 is transmitted by the rod 35 (restrained to move vertically) and the electrode 24 slides over the surface of the semi-conductor block 21 thus altering the distance between the emitter and collector electrodes. To reduce wear in this type of embodiment a Boiling or rocking movement of the .emitter electrode may be employed as shown in Fig. 6. The emitter electrode is a sector of a sharp-edged disc 44 the diameter of which is slightly less than that of the concave surface of the block. It is held in a normal rest position in which its point of contact is slightly misaligned with the collector electrode 25 by a restoring spring 46 serving also as an electrical connection, and is rocked under control of the applied vibrations. Specifications 472,101, 632,942, [ Group XXXVI], 632,980, [Group XL (c)], 694,021, 694,022, [Group XXXVI], 694,023, 694,024, 694,025, 694,026 and 700,232 are referred to.
Patent GB-501895-A (GB)
Title: Manual cocking mechanism for automatic firearms
IPC: F41A7/02
Filed: 1938-07-15
Abstract: 501,895. Automatic guns. RHEINMETALL-BORSIG AKT.-GES. July 15, 1938, No. 21047. Convention date, July 16, 1937. [Class 92 (ii)] Relates to chain and sprocket means for manually opening the breech for recocking, and consists in guiding the open ends of the chain 3 in grooves 2a, 2b in the gun casing 2. In the form shown, the sprocket 4 is rotated by a handle 6 which on rotation is moved away from a stop 2d by a screw thread on the hub 2c, thereby providing for more than one revolution of the handle. The breech is opened by a projection 5 at one end of the chain and the casing 2 is preferably removably attached to the gun body.
Patent GB-686760-A (GB)
Title: Improvements in or relating to two-way radio communication systems
Inventor: COLLINGS RUPERT HEDLEY PALK
IPC: H04B17/40
Filed: 1949-08-12
Abstract: 686,760. Radio signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 16, 1950 [Aug. 12, 1949], No. 21062/49. Class 40 (v). In a two-way radio communication system, a repeater station, on receipt of predetermined signals peculiar to that repeater, is arranged to repeat the signals back in the direction from which the signal was received instead of forward to the next station in the system. In this way the system may be tested station by station by looping each repeater back to the terminal station in turn. As shown, each repeater station in a frequency modulation communication system comprises a receiver R1 receiving on frequency f1 and feeding a transmitter T1 transmitting on f2, and a receiver R2, for the other direction, receiving on f3 and feeding a transmitter T2 which transmits on f4. Each receiver is provided with a demodulator whose output is fed to a filter F1 or F2 responsive to the allocated signal, which may be a tone signal of different frequency for each receiver. The filters are coupled to rectifiers D1, D2, respectively, the outputs controlling relays K1 or K2. If the relay K1 is operated by receiver Rl, it switches on an oscillator O1, of frequency f3-f2, and a mixer M1, which receives as its inputs the frequency f3-f2 and the frequency f2 from the transmitter T1, the resultant frequency f3 being fed to the receiver R2 and transmitted back on transmitter T2. Similarly receipt of the appropriate tone at receiver R2 will cause oscillator 02 of frequency f1-f4, and modulator M2 to be switched on, the output f1 being fed to R1 and transmitted back on T1. To prevent " ringing " the relays K1, K2 are interconnected so that when one is in operation the other is disabled. In a simplified arrangement the receiver may be provided with an extra piezoelectric crystal which can be substituted in the frequency changing circuit to render the receiver responsive to the appropriate transmitter at the same station, as described in Specification 670,302. Time delay circuits may be provided at a repeater station to ensure that when a predetermined signal has looped back that station it will remain looped back for a predetermined time after the signal ceases, to enable other signals to be sent round the loop for special test purposes. Reference has been directed by the Comptroller to Specification 652,111.
Patent GB-1071209-A (GB)
Title: Improvements in or relating to centrifugal apparatus for cleaning or scaling machines
Inventor: BERGHOF HANS
IPC: B24C5/06
Filed: 1966-05-12
Abstract: 1,071,209. Blasting. GIESSEREIANLAGEN VEB. May 12, 1966, No. 21071/66. Heading B3D. Blades 2 are secured to a shaft 1 by parts 3. Blasting medium is fed to the blades, by gravity or a blower, through feed pipes 4 having opposed outlets 5, one or both of the pipes being adjustable.
Patent GB-1276819-A (GB)
Title: Electric cooking oven
IPC: F24C15/20
Filed: 1970-05-01
Abstract: 1276819 Burning waste gases; cooking ovens BOLT BERANEK & NEWMAN Inc 1 May 1970 21074/70 Heading F4W In a cooking oven having a food support 7, a heating element 9 above the food support, an exhaust outlet 5 and an oven door 3, a catalytic oxidation unit or units 11 are arranged between the heating element 9 and the exhaust outlet so that fumes from the food cooking on the support 7 are burnt in the catalytic units 11. Each unit 11 is of the type comprising a coil of corrugated material on which the catalyst is supported to form a number of parallel passages, and the fumes and the catalytic units are heated by the cooking element 9. The oven is arranged so that the passage of air into the oven is possible with the door closed, and a second heating element 8 is arranged below the support 7.
Patent GB-579785-A (GB)
Title: Production of cyanogen
IPC: C01C3/00
Filed: 1943-12-17
Abstract: 579,785. Cyanogen: hydrochloric acid. DU PONT DE NEMOURS & CO., E. I., LACY, B. S., BOND, H. A., and GARDENER, W. S. H. Dec. 17, 1943, No. 21176. [Class 1 (ii)] Cyanogen is obtained by reacting hydrocyanic acid with chlorine or cyanogen chloride in the vapour phase at an elevated temperature. The reaction may be effected in an empty glass or quartz tube having smooth walls at a temperature not lower than 600-700‹ C., or in a reaction chamber packed with inert solids, but preferably, the reaction mixture is passed over a surface-active material at a temperature of 200- 1,000‹ C. Suitable surface-active materials are active carbon or silica gel. If the reaction is conducted under essentially adiabatic conditions, the gases are fed to the reaction vessel at temperatures suitably below the final reaction temperature, yet high enough to initiate the reaction. Preferably when operating adiabatically the reaction mixture is diluted with partially cooled off gas from the reaction chamber, thus recycling part of the product. The hydrocyanic acid may be employed in slight stoichiometrical excess. The offgas is cooled, scrubbed with water to remove hydrochloric acid as a concentrated solution and dried. Finally, the cyanogen may be purified from its slight content of hydrocyanic acid by rectification.
Patent GB-651845-A (GB)
Title: Improvements in or relating to snap-acting thermostatic elements
IPC: H01H37/54
Filed: 1947-08-05
Abstract: 651,845. Thermal switches. METALS &  CONTROLS CORPORATION. Aug. 5, 1947, No. 21234. Convention date, April 1, 1939. [Class 38(v)] [Also in Group XIII] A snap-acting thermal element of multimetallic sheet which is self-heated by current flowing therethrough has a curved main body portion, such as a  dished disc 15, constituting an active area which changes shape abruptly, and a pair of ears 17, 19 integral with the main portion projecting outwardly in opposite directions and lying outside the active area. Furthermore, electrical connecting means, e.g. a bracket 21 and a contact 23, are welded to the ears. Specification 178,103, [Class 38(v)], is referred to.
Patent GB-623642-A (GB)
Title: Improvements in or relating to insulating coverings particularly for castings and method of forming same
IPC: B22D7/10
Filed: 1946-07-16
Abstract: To insulate the riser, sinkhead, &c. of a solidifying casting or ingot, material capable of permanent expansion by heat is placed thereon.  Suitable materials are perlite, vermiculite, or mercuric thiocvanate.  A measured quantity of the material, by itself or mixed with exothermic or inert material or a viscous liquid, e.g. tar, may be thrown on to the casting or inserted in a combustible container which is placed thereon.  In some cases it is preferable to add to the material or mixture glue or other adhesive and form the whole into a slab with, if desired, reinforcing wires or paper board on one or both sides.  The slab may be dried at 200 DEG  or 300 DEG  F and coated for waterproofing.  It is preferably made small enough to be inserted in the ingot mould, hot top or riser but in some cases a slab may be placed across the opening of the mould so that the heat of the casting may destroy the bond and allow the material to fall in.  Suitable inert fillers are slag, rock wool, sand, clay, ashes, and crushed brick. Exothermic fillers should be slow burning, e.g. coal, coke, sawdust, hulls, stalks and straw.  Instead of glue may be used clay, e.g. bentonite with or without sodium silicate, cement, dextrin, cornflour, goulac, core oil, gelatine, casein, gum, resin or wax.
Patent GB-1007682-A (GB)
Title: Improvements in or relating to concrete ribbed ceilings reinforced with prefabricated girders
IPC: E04C1/40
Filed: 1963-05-28
Abstract: 1,007,682. Reinforced concrete floors. H. RICHTER. May 28, 1963 [May 30, 1962], No. 21357/63. Heading E1V. In a concrete floor comprising a compression layer and spaced ribs reinforced by prefabricated girders 14, Fig. 1, which also support flanged ceiling panels 11, shuttering members 18 of inverted U-shape are sprung into dovetail grooves 15 in the panels 11 and are closed by end panels such as 21, Fig. 4. The members 18, 21 may be of hard fibreboard, cardboard synthetic plastics or sheet metal. The end panel 21 shown has tongues engaging dovetail slots in the member 18 & panel 11. In modifications the end panel may have inturned flanges gripping the member 18, or may be held by clips. Thick supporting slabs, e.g. of pumice concrete or clay, Fig. 2 (not shown) may be used as end panels and may be placed at intervals in the hollow space between the panel 11 and the roof of the member 18. The panels 11 may be of concrete, clay, sand-lime bricks or other material, may have cavities 19, and may be reinforced. One of the cavities may be shaped as shown at 32, Fig. 6, to provide a breakage line 33 for forming a narrow flanged panel. In Fig. 6 two narrow members 18<SP>1</SP> are provided for each panel 11<SP>1</SP>; in a modification a single narrow member 18 is placed centrally over the panel 11. In a further modification the panel 11 has dovetail grooves on both faces, one on the lower face receiving battens carrying a plaster support surface. The edges of the members 18 may be wedge-shaped to provide a positive connection with the dovetail grooves.
Patent GB-797390-A (GB)
Title: Improvements in or relating to a process for producing citric acid by aerobic fermentation of solutions containing molasses
IPC: C12P7/48
Filed: 1956-07-10
Abstract: Citric acid is produced by aerobic fermentation of molasses-containing solutions, the process comprising growing a micro-organism which will ferment sugars to citric acid in a medium poor in sugar and having a Buffer Index of from 0.07 to 6, preferably 0.07 to 3.0, more conveniently 1.50 to 3.0, then after decrease of the pH of the medium to 3 or below 3 resulting from the production of acid by the micro-organism, and without separating the mycelium formed, adding diluted molasses solution at a rate such that the pH is maintained at 3 or below 3.  The Buffer Index is defined as the number of grams of pure HCl required to decrease the pH from 6.0 to 3.0.  Sugar and/or nutrient elements are added to the medium containing the mycelium or to the added molasses solution as required to correct deficiencies.  An acid which does not interfere with the biochemical reactions may be added during the growth period; citric acid is recommended, advantageously in the form of residual, non-crystallizable citric acid mother liquors.  When fermentation is ended or almost ended, part of the must may be withdrawn, continuously or batchwise, and replaced by an equal volume of molasses solution of substantially the same concentration, the pH being maintained at or below 3.  Sugar may be added to the molasses during this period.  Micro-organisms mentioned include Aspergillus niger and A. Wentii strains.  The molasses may be pre-treated, e.g. with ion exchange resins, Ca(OH)2, alkaline ferrocyanides or any other precipitating or complex-forming agents, such as phytates, particularly to reduce the heavy metal, especially iron, content.  In examples: (2) a solution of molasses previously treated with potassium ferrocyanide and containing added KH2PO4 and MgSO4 is inoculated with a citric acid-producing strain of A. niger, incubated at 32 DEG  C. with stirring while passing air saturated with water at 32 DEG  C.; after 36 hours the pH has fallen to 2.9 and a stronger solution of the molasses is fed in at a rate such as to maintain the pH at 2.5 to 2.9; (3) a must in which fermentation is complete is prepared as in (2); batches are then removed and replaced by fresh molasses solution containing added KH2PO4 and fermentation continued, the pH being maintained at 2.6-2.9 Specification 577,490, [Group IV], is referred to.
Patent GB-460874-A (GB)
Title: A new, or improved, pocket-wallet, carton, or fully opening container, for holding advertising strip matches, maps, catalogues, needles, tickets, or other commodities of everyday use
IPC: B65D75/54
Filed: 1936-08-01
Abstract: 460,874. Match, ticket, &c. wallets. SMITH, W. D. J. Aug. 1, 1936, No. 21392. [Classes 18 and 94 (i)] A flexible sheet foldable to form a carton for containing matches, tickets, or other commodities has side panels X, Y adapted to be folded zigzag fashion to protect the matches on both faces and at the sides. The matches may be mounted in a block A pinned to the blank at D and after the side panels are folded longitudinally and transversely as shown, the folded end C<3> is tucked into the mouth formed by the portion C<2> and the edges of the side panels. Abutment of these edges against the block A limits the insertion of the end C<3>.
Patent GB-666670-A (GB)
Title: Sliding control for the shifting of a chain in bicycle change speed gears
IPC: B62M9/134
Filed: 1949-08-17
Abstract: 666,670. Change-speed gear. JUY, L. C. H. Aug. 17, 1949 [Sept. 3, 1948], No. 21413/49. Class 80 (ii). A cycle chain is shifted laterally on to either one of a, pair of different-sized pedal-crank sprockets 16, 17 by a fork 13 carried by a spindle 1, slidable transversely in a casing 2 attached to the frame seat-pillar 3, and operated by the cranked end of a handled rotary control-shaft 14 mounted along the seat-pillar and engaging a grooved collar 6 angularly and axially adjustably secured on the spindle 1 by a set-screw 7, which passes through a casing-slot 8 and may thereby limit the travel. In Fig. 5 (not shown), the casing-walls define the extreme positions, that on the right having a screw-adjustable bush to define the rightward extreme.