baber/WOPTO huggingface dataset:
Patent GB-798114-A (GB)
Title: Device for hindering overhearing in secret information transmission systems
IPC: H04K1/02
Filed: 1956-07-20
Abstract: 798,114. Magnetic recording and reproducing apparatus. BOLKOW, L. July 20, 1956 [July 23, 1955], No. 22516/56. Class 40 (2). [Also in Group XXXIX] In a magnetic record device for aiding secrecy of transmissions, recording and pick-up heads in both receiving and transmission stations engage the inside surface of a record cylinder, wherein the relative speed between at least one head and the cylinder is varied at each station during transmission. The apparatus described comprises a shallow revolvable record-carrying member 1 carrying a cylindrical record medium 2 and a stationary member carrying a recording head 14, a pick-up head 16 and erasing heads 15 and 17. Two further members 10 and 12 supporting recording and pick-up heads 18 and 19, respectively, are oscillated rotationally during rotation of the record carrying member 1 under the influence of cam followers 20, 21, respectively, which follow the undulations of an endless cam belt 3 and cause shafts 29 and pins 31 to oscillate lugs 32 on support members 10 and 12. In operation, signals from a microphone 41 are recorded via amplifier 43 by head 14, and picked up in scrambled form by head 19 from whence they are fed via amplifier 45 to a receiving station by cable or radio. At the receiving station this scrambled information is fed through amplifier 46 to recording head 18 which is controlled in its oscillation by cam follower 20 operated by a cam belt rotating synchronously with the belt in the sending station. The signals ae thus recorded unscrambled and picked up by head 16 and fed via amplifier 48 to headphone 49. The relative positions of arms 11 and 13 carrying the followers 20 and 21 may be accu-' rately adjusted by means of vernier scales 35, so that time delay in accordance with distance of the transmissions may be compensated.
Patent GB-690269-A (GB)
Title: An improved screw
IPC: F16B25/10
Filed: 1951-09-26
Abstract: 690,269. Drills ; self - tapping screws. ARNOLD, J. C. (Robertson Co., H. H.). Sept. 26, 1951, No. 22540/51. Class 83 (iii). [Also in Group XXV] A self-drilling and self-tapping screw, preferably of hardened steel, comprises a head 12 with cross-slots 34, an elongated screwed portion 16 and a rectangular cutting portion 14 which is of greater width than thickness and has at least one of the narrow sides tapered and bevelled to provide a cutting edge. As shown, both narrow sides are tapered at an angle a of between 35 and 45 degrees and bevelled at an angle of about 22 degrees so as to form cutting edges 18, 20 joined by a further cutting edge 22 lying across the bottom at right angles to the screw axis but diagonally to the wider sides of the cutting portion. The length of the cutting portion is such that the hole is completely drilled before the threaded portion enters it and its width is slightly greater than the root diameter of the screw. The head has a shoulder 28 of a diameter between the full and root diameters of the screw and a recess 36; a resilient washer 32 forced over the threads into place on the shoulder is received in the recess 36 to form a waterproof joint when the screw is used to secure together sheets such as metal roofing sheets.
Patent GB-1167116-A (GB)
Title: Process for the Preparation of Organic Acids.
Inventor: STOUTHAMER BERNHARD
IPC: C07C51/14
Filed: 1968-05-13
Abstract: 1,167,116. Monocarboxylic acids. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 13 May, 1968, No. 22543/68. Heading C2C. Monocarboxylic acids are prepared by contacting branched chain mono-olefines with 4 to 10 C atoms in their molecule with carbon monoxide and an excess of water in the presence of liquid hydrogen fluoride while intimately mixing the said components. The mono-olefines are diluted with one or more inert diluents which are liquid saturated hydrocarbons. Examples of the starting materials are isobutylene, 2-methylbutene-1 and mono-olefines having up to 16 C atoms which decompose under the reaction conditions to olefins with 4-10 C atoms, e.g. tetraisobutylene.
Patent GB-728923-A (GB)
Title: Improvements in or relating to steering gear for motor vehicles
IPC: B62D3/10
Filed: 1952-09-08
Abstract: 728,923. Cam steering mechanism. ZAHNRADFABRIK FRIEDRICHSHAFEN AKT.- GES. Sept. 8, 1952 [Sept. 20, 1951], No. 22665/52. Class 80 (3). In a vehicle steering gear, a steering worm 2 engages a roller 17 rotatably mounted in a holder 16 'which is itself held in a jacket 22 rotatably and slidably mounted in a bush 24 in the rocking arm 7. An adjusting screw 10 bears against the rocking arm 7 and a spring-loaded pin 19 reacts against a nut 21 to allow the roller to yield under excessive shocks. Forward movement of the pin 19 is limited by the engagement of a collar thereon with a shoulder in the bush 24 so that the spring is not normally operative on the roller, and forward movement of the jacket 22 is limited by an expanding ring 23. An adjusting nut, Fig. 1 (not shown), is provided for the bearings of the worm. The worm thread is deeper at its centre than at its ends, and the thread width narrows as the thread depth decreases.
Patent GB-1330715-A (GB)
Title: Electronci oscillators
IPC: H03K3/30
Filed: 1971-04-19
Abstract: 1330715 Automatic voltage control ROBERT BOSCH GmbH 19 April 1971 [26 Feb 1970] 22578/71 Heading G3R [Also in Division H3] An oscillator comprising complementary amplifier transistors 10, 11, capacitors 19, 20 and a series circuit Co Lo, which last four elements form a parallel tuned circuit, is provided with a control circuit to stabilize the amplitude of oscillation consisting of a circuit 22---26 which derives a rectified smoothed potential representative of the oscillation amplitude for application to the base of a control transistor 12 forming part of a potential divider 13, 14, 15, 16 determining the operating points of the transistors 10, 11, the arrangement being such that increase or decrease of the oscillation amplitude varies the conduction of the transistor 12 to decrease or increase the gain of transistors 10, 11 and hence the oscillation amplitude. Oscillation is maintained by positive feedback from a resistor 21 to the bases of transistors 10, 11 by way of the tuned circuit. The member Lo can comprise the inductance of a displacement transducer and has a central tapping 17 with a movable core 18. The advantages of the described oscillator over a single-transistor Clapp oscillator are discussed.
Patent GB-221348-A (GB)
Title: Hand operated cranes
IPC: B66C23/20
Filed: 1923-09-08
Abstract: 221,348. Reid, J. Sept. 8, 1923. Geared pulley-hoists; driving-gear. - In handoperated portable jib cranes in which the load is raised by a worm-geared chain-operated pulleyhoist 7, the operating chain 8 is driven by a chain wheel 9 provided with a crank handle 11 and mounted at the side of the jib 4.
Patent GB-445003-A (GB)
Title: Improvement in centrifugal clutches for rotating machine elements
IPC: F16D43/04
Filed: 1935-08-12
Abstract: 445,003. Friction clutches; variablespeed gearing. JONSSON, G. E., Huddinge, Sweden. Aug. 12, 1935, No. 22701. Convention date, Sept. 11, 1934. [Class 80 (ii)] In a centrifugal clutch, each of a pair of segments 7 is retracted on to a driven drum 8, relative to which it has limited circumferential movement due to the engagement in slots 10 in the drum of a pair of bolts 9 secured to the segment, by means of a spring 12 disposed between the drum and a yoke 11 bearing against nuts adjustably threaded on the bolts 9. Contacting with each yoke 11 is the longer arm of a bell-crank lever 14 pivoted at 13 in the drum 8, while the shorter arm of this lever carries a lever 18, one arm of which engages a slot in the segment 7 while the other arm contacts with the end of the longer arm of the lever 14 associated with the other yoke 11. A pin 19 secured to each yoke is guided in a flared opening in the lever 14. At a predetermined speed of the drum 8, the segments move centrifugally outwards into frictional engagement with a driving drum 6, advancing slightly relative to the drum 8 and thereby, through the levers 18 and 14, acting on the yokes 11 to reduce or suppress the effect of the springs 12. Disengagement will, therefore, occur only at a speed substantially below that at which engagement occurs. As applied to a changespeed gear for a motor vehicle, the engine shaft 1 drives the drum 6, which is secured to a hollow shaft 4 which is adapted to drive the cardan shaft 5 through reducing gearing, through a manually-controlled plate clutch 3, while the centrifugal clutch is adapted to connect the drum 6 direct to the shaft 5. The reducing gearing may include a free-wheel clutch, or means may be provided whereby it is disconnected as the centrifugal clutch engages. According to the Specification as open to inspection under Sect. 91, each lever 14 may bear against the corresponding yoke 11 through a ball-and-socket device, the pin 19 being dispensed with. This subject-matter does not appear in the Specification as accepted.
Patent GB-479608-A (GB)
Title: Improvements in or relating to poultry houses
IPC: A01K31/22
Filed: 1936-08-19
Abstract: 479,608. Poultry houses. COOPER, R. Aug. 19, 1936, No. 22791. [Class 5 (ii)] In a collapsable poultry house of the night ark type, the roof sections a, b are hinged together at c, the section b being hinged at f to the floor d that carries the hinged end walls i and is secured by a catch device g, h to the other roof section a. The house is collapsed by detaching the catch parts and turning the roof sections about the hinges c, f to lie on the underside of the floor while the end walls are folded on to the upper side of the floor, as shown in Fig. 3. A metallic ridge m is adjustable on wedge parts to control the ventilation of the house. In a modification, side walls are provided and are hinged to the lower edges of the roof sections.
Patent GB-394161-A (GB)
Title: Improvements in or relating to cathode arrangements for use in thermionic valves
IPC: H01J1/15
Filed: 1932-08-15
Abstract: 394,161. Thermionic cathodes. TELEFUNKEN GES. FR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Aug. 15, 1932, No. 22867. Convention date, Aug. 13, 1931. [Class 39 (i).] The cathode of a thermionic valve consists of an N- or W-shaped filament heated by alternating-current and having separate portions so connected that maximum potential difference occurs at those points on the portions where they are nearest to each other and the voltage drop along the cathode from end to end is discontinuous. A W-shaped filament may be arranged as shown in the Figure with its outer ends 0 connected together and forming the middle of the electrode system.
Patent GB-1152951-A (GB)
Title: Manufacture of Surface-Treated Metallic Sheets
IPC: C09D109/10
Filed: 1966-05-24
Abstract: 1,152,951. Modifying metallic surfaces. NIPPON KOKAN K.K. May 24, 1966 [May 25, 1965], No.23189/66. Heading C7U. Sheets of e.g. steel or galvanized steel are formed with a protecting layer by preparing an aqueous emulsion from either a butadiene series synthetic rubber or vinylidene chloride modified with a polarizing radical of the formula - COOH, = C-C  \ / O =, -CONH 2  or CONHCH 2  OH, adding thereto a dispersion of chromic acid, phosphoric acid and a reducing agent for chromic acid, contacting the surface of the sheet with the resulting liquor and curing at e.g. 260 to 330‹C. The reaction being such that 96 to 100% of the hexavalent chromium is converted to trivalent chromium. The reducing agent may be millet-jelly, sucrose, glycol or glycerine.
Patent GB-500999-A (GB)
Title: Improvements in or relating to alternating current signal receiving circuits
IPC: H04Q1/446
Filed: 1937-08-20
Abstract: 500,999. Alternating-current signalreceiving arrangements. STANDARD TELEPHONES & CABLES, Ltd., NEILSON, C. B. V., and THOMAS, P. R. Aug. 20, 1937, No. 23207/38. Divided.out of 501, 028. [Class 40 (iv)] [Also in Group XL] An alternating-current signal receiver comprises a gas discharge tube NT1 which is rapidly ionized and de-ionized during reception of a signal by the inter-action of relay A connected to electrode E3 and a relay C normally operated over back contacts of A, a slow-to-release relay B being operated and held by C and A. The arrangement is described in connection with a receiver in which tube NT1 is fed over circuits AC1, RC1, tuned to the signalling frequency, and which is rendered immune to voice currents by a second tube NT2 fed over a circuit RC2 passing frequencies other than the signalling frequency and controlled by relays GA, GC in a manner similar to the first tube. On receipt of pure signalling frequency, relay D falls back to repeat the signal, but if voice currents arrive, D is maintained operated by GA and GC to prevent repetition. To prevent changes in impedance of the receiver due to the operation of the discharge tubes from affecting the main transmission channel which as shown comprises a four-wire terminal, the output of amplifier V, the receiver R, and line L are connected in conjugate relationship by a coil 1 and balancing resistance X.
Patent GB-1603898-A (GB)
Title: Telecommunications system
IPC: H04M7/12
Filed: 1978-05-26
Abstract: This information transmission system for speech, music, text, images and data has a basic telecommunications network (I), in particular for analog transmission, and an additional digital overlay network (II). The two networks are interconnected between their terminating exchanges (6, 7, 9, 11) via analog-digital or digital-analog converters (10, 12). Current communications facilities are retained thanks to the continued existence of the basic telecommunications network (I), while a user group interested in new, high-speed forms of communication can be served via the digital network (II). <IMAGE>
Patent GB-1184928-A (GB)
Title: Improvements in or relating to Tunable Resonant Lines
IPC: H03J3/18
Filed: 1967-05-19
Abstract: 1,184,928. Tuning arrangements. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 19 May, 1967 [26 May, 1966], No. 22360/67. Heading H3Q. [Also in Division H1] A tuneable circuit comprises an outer conductor 1 (Fig. 1) within which is a #/4 line including an inner conductor 2, one end of which is directly connected to the outer conductor and the other end to a voltage dependent capacitor diode 3 which also forms part of the resonant line. The diode 3 is connected via a blocking capacitor 4 to the outer conductor 1, and to a control voltage U R  via a lead 5. A U-shaped wire strap 6 is connected between the inner and outer conductors, and by swinging or bending the strap about its connection points, the line inductance can be varied. For example in the strap position shown in Fig. 2 the inductance is a maximum. There may be two U-shaped straps. Alternatively the diode 3 may be mounted perpendicularly to the inner conductor Figs. 4, 5 (not shown).
Patent GB-1477487-A (GB)
Title: High pressure sodium-vapour discharge lamp
IPC: H01J61/54
Filed: 1974-05-24
Abstract: 1477487 Metal vapour lamps ITT INDUSTRIES Inc 24 May 1974 [25 May 1973 21 Nov 1973] 23396/74 Heading H1D In a high-pressure sodium-vapour discharge lamp one or more auxiliary electrodes is so arranged within the envelope as to bridge, nearly completely, the sustained operation discharge space between the main electrodes, thus defining an auxiliary discharge space with at least one of the main electrodes which is very much smaller than the sustained discharge space. As shown in Fig. 1, a starting electrode 4 is connected to one main electrode 3 and extends to a short distance from the other main electrode 2. The electrodes lie within the inner alumina envelope 13, which is in turn enclosed by a glass envelope 14. Leads are sealed into the alumina envelope 13 by concentric metal tubes made of alumina, titanium, vanadium and niobium. Envelope 13 may be filled with Hg and Na vapour, and a starting gas such as A, Xe, or a mixture of inert gases. Envelope 14 is evacuated. Electrode 4 may be of helical form, and may form gaps with both electrodes' Fig. 3, not shown), and may be formed as a conductive strip layer deposited on the inside of envelope 13.
Patent GB-172685-A (GB)
Title: Improvements in the production of calcium carbide
IPC: C01B32/942
Filed: 1920-08-10
Abstract: Agglomerates for subsequent conversion to calcium carbide are manufactured by heating a mixture of limestone with pitch, heavy oils, or like heavy hydrocarbons to a temperature above 100 DEG  C. for a period from 20 to 24 hours.  The limestone is preferably ground before mixing, and the heating is continued until the carbonization is complete.  The preferred form of retort enables the carbonization to take place continuously, and the gases used to heat the retort are pre-heated by utilizing the heat evolved by the cooling agglomerate. By spraying the latter with a mixture of hot tar and pitch or by introducing coal or coke oven gases or some hydrocarbon into the retort during the last part of the carbonization, the agglomerate is protected from moist air during storage by a deposit of carbon produced by the splitting up of the hydrocarbon present. Specification 14486/15 is referred to.
Patent GB-644967-A (GB)
Title: Cutter
IPC: B23D35/00
Filed: 1948-09-06
Abstract: 644,967. Shearing; shear-blades. PATTON, C. C. Sept. 6, 1948, No. 23445. Convention date, Sept. 8, 1947. [Class 83 (iv)] In a hand-operated pivoted blade shearing- machine with blade 16 co-operating with undercut bolster plates, the blade 16 is corrugated and hinged on a pivot 17 and comprises a thin portion 21 and a part 16 which increases in thickness from the pivot and from the cutting edge. A thickened portion 27 wedges the bolster plates apart to free the cuttings. A stripper pin 24 selectively positioned in holes 22, 23 strips the sheet from the blade. In cutting thin sheets the pin 24 is positioned in the hole 22 and prevents the sheet from riding up the blade. When the handle is turned to vertical position the cut in the sheet engages the portion 21 and may be moved freely for the next cut. In cutting thick sheets the pin is placed in the hole 23.
Patent GB-1314115-A (GB)
Title: Fuel injection pump nozzles for internal combustion engines
IPC: F02M59/34
Filed: 1971-04-19
Abstract: 1314115 I. C. engine fuel injections ROBERT BOSCH GmbH 19 April 1971 [14 March 1970] 23462/71 Headings F1B and F1D A fuel injection pump nozzle for 1. C. engines comprised a pump piston 37 operated by a servopiston 34, fuel being fed from a supply pipe 29 to the pump piston working chamber 41 via a supply valve 44 and to the servopiston pressure chamber 32 when a magnetically operated valve 73,, which is operated in timed relationship with engine cycles is opened to start the injection. When valve 73 is returned to the position shown in Fig. 1, injection ceases and the servopiston begins its return stroke causing fuel in chamber 32 to be ejected via a return pipe 36. There is a continuously open connection between the pump working chamber 41 and an injection nozzle chamber 57 whose outlet is controlled by a valve needle 19. The needle 19 is opened by pressure in chamber 57 when the pump piston 37 is actuated. The magnetically operated valve is pressure compensated via passage 85. Fuel leaking past pistons 34, 37 collects in chamber 69 and is taken via non- return valve 68 to return pipe 36.
Patent GB-711867-A (GB)
Title: Improvements in respirators
IPC: A62B18/02
Filed: 1951-10-09
Abstract: 711,867. Respirators. WILLSON PRODUCTS, Inc. Oct. 9, 1951 [March 26, 1951], No. 23486/51. Class 81(2) A respirator includes a resilient cup-shaped facepiece of substantially pear-shaped contour along its mouth portion which has an integral inwardly turned marginal portion thinner than the adjoining facepiece portion, the edge of the marginal portion lying in a plane. The facepiece 1 covers the nose and mouth and is provided with an inturned marginal portion 6 which widens towards the mouth portion of the facepiece 1. Two air inlets 13 covered by detachable filter units 17 are provided. Each filter unit 17 has wedge-like flanges 19 which on rotation engage with inturned flanges 16 of a cup 15 secured to the facepiece 1. A gasket 20 against which the filter unit 17 is pressed is provided within each cup 15. On the interior of the facepiece 1 the air inlets 13 are covered by sheet rubber valves 38. An exhalation valve 5 is closed by a thin rubber disc 12 the valve opening being in the form of several apertures separated by spoke portions. Elastic securing straps 43, 44 are provided. The filter circuits 17 are each in the form of a hollow cylinder 18 on which flanges 19 are located and enclose a chemical charge 24 retained by filter pads 25, 26 and wire screens 27, 28. Alternatively the filter units 17 may be in the form of perforated filter holders (not shown) which have securing flanges and which when placed in position in the cups 15 clamp a disc-shaped or accordionpleated filter pad over the air inlets 13.
Patent GB-1352000-A (GB)
Title: Method of manufacturing metallic short fibres
IPC: B22D11/00
Filed: 1971-04-19
Abstract: 1352000 Continuous casting; making short metallic fibres MITSUI MINING & SMELTING CO Ltd 19 April 1971 [22 June 1970] 23495/71 Headings B3A and B3F Molten metal A is extruded, e.g. mechanically or by gas pressure, through an orifice 2 having a cross-sectional area in the range 0À008 to 0À09 mm.<SP>2</SP> to form a filament which collides obliquely with a slanted cooler 3 while in a condition of hot shortness immediately after solidification and breaks into lengths F not exceeding 7 mm. The cooler may be a stainless steel plate or a water-cooled copper block; a block may be air- or water-cooled. It may be vertically and horizontally movable to determine the distance of the collision point D from the point B where the filament is completely solid. This determines the length of fibres F. The melt A may be Al, Pb or Zn, or alloys based on these metals, such as Pb containing 4% Sb or Al containing 11% Si. The fibres can be mixed with synthetic resin to form an electrically and thermally conducting material or be compacted in a die to form porous articles such as plates, e.g. battery plates, or catalyst, filter or sound insulation material.
Patent GB-1188525-A (GB)
Title: Filters for Liquids
Inventor: BUCKMAN KENNETH ERNEST
IPC: B01D29/11
Filed: 1966-05-26
Abstract: 1,188,525. Oil filter. GENERAL MOTORS Ltd. 27 April, 1967 [26 May, 1966], No. 23646/ 66. Heading B1D. An oil filter, for an I.C. engine, comprises a tubular pleated element 30 of resin-impregnated paper, having the flow resistance of one portion C thereof increased by compressing the pleats together and/or by adding a further filtering sheet 37 of similar porosity, outside or inside, whereby this portion takes a smaller flow rate per unit area than the rest and acts as a reserve of filtering capacity. Fig. 1 (not shown) illustrates a filter having compressed pleats only and Figs. 2-4 (not shown) a sliding jig whereby the pleats are so spaced. The further sheet may be bonded to the pleats all round its periphery (Figs. 5, 6, not shown) or at the ends only, with its sides merely folded between adjacent pleats (Figs. 8, 9, not shown), and may have a central aperture 39 and corner or side discontinuities in sealing, whereby it is by-passed when clogged. Pleats may be spaced by dimples (14, 15) and their ends sealed individually (16) and/or to end caps (Fig. 11, not shown) by adhesive.
Patent GB-1472408-A (GB)
Title: Iodine composition
IPC: A61L12/10
Filed: 1974-05-28
Abstract: 1472408 Antiseptic composition FLOW PHARMACEUTICALS INC 28 May 1974 23655/74 Heading A5E An aqueous, antiseptic, iodophor solution comprises (a) from 0.00005-10% by wt. iodine, (b) from 0.0001-20% by wt of a water soluble iodide salt, (c) from 0.001-25% by wt polyvinyl alcohol and (d) from 0.001-10% by wt loric acid. It is preferred to use KI or NaI as the soluble iodide salt. Other additives. include H3PO4, HCI, H2SO4, HNO3 or acetic acid to adjust the pH of the solution, alkali metal and alkaline earth metal salts to adjust the osmotic pressure of the solution, anionic, cationic and nonionic detergents.