baber/WOPTO huggingface dataset:
Patent GB-107577-A (GB)
Title: An Auxiliary Stringing Device for Preparing Strings for use on Stringed Musical Instruments.
Inventor: KLEIN LIDUS
IPC: G10D3/00
Filed: 1917-05-12
Abstract: 107,577. Klein, L. June 24, 1916, [Convention date]. Tuning-devices.-An auxiliary device for stretching violin &c. strings before use has bridges 8, 9 tunings pins or pegs 7, and tail-piece 2 in positions corresponding with those of the instrument. The body 1 may be formed as a resonator, and an adjustable fixing device may be substituted for the notched tail-piece.
Patent GB-1178638-A (GB)
Title: Improvements in or relating to Laryngoscopes
Inventor: LAERDAL ASMUND S
IPC: A61B1/267
Filed: 1968-02-12
Abstract: 1,178,638. Laryngoscope. A. S. LAERDAL. 12 Feb., 1968 [18 Feb., 1967], No. 6847/68. Heading A5R. A laryngoscope comprises a body 1 containing a dry battery 2 in contact with terminals 3, 4 and 5, terminals 3 and 5 being equivalent and diametrically opposite to each other, and a spatula 10 containing an electric bulb 9, and a tube 8 carrying electric leads from the bulb to a terminal block 7 from which contacts 20 and 22 (Fig. 5, not shown) project so as to contact the terminals 3 (or 5) and 4 when the spatula is moved to the operative position. The spatula is pivotally attached to the body at 13 by a spring-loaded pin 15 (Fig. 3, not shown), the pivot joint being readily taken apart and reassembled with the spatula in either of the two positions in which contact is made (i) with terminals 3 and 4 or (ii) with terminals 4 and 5. The lamp holder, leads and associated contacts constitute a unit removable from the body.
Patent GB-751249-A (GB)
Title: Wide band directional antenna
IPC: H01Q19/10
Filed: 1954-03-09
Abstract: 751,249. Aerials. COMPAGNIE FRANCAISE THOMSON-HOUSTON. March 9, 1954 [March 12, 1953], No. 6848/54. Class 40 (7). A wide-band aerial system consists of a reflector comprising two surfaces meeting at an angle and a radiator in the bisecting plane of the reflector comprising two trapezoidal elements arranged symmetrically with respect to the median plane of the antenna. Each trapezoidal element has the side nearest the median plane parallel thereto and its two ends at right angles to this side, the length of the end nearest the apex of the reflector is made approximately a quarter wavelength long at the highest frequency to be handled and that furthest from the apex approximately a quarter wavelength long at the lowest frequency to be handled. The elements are so placed that the sides not so far mentioned will, if produced, intersect at the apex of the reflector. A schematic illustration of the system is given in Fig. 3, wherein the reflector consists of a V- shaped support 2 each arm of which is several wavelengths long and on which rods 3 are mounted a tenth of a wavelength apart. The trapezoidal radiating elements which form the equivalent of a series of dipoles of different lengths are shown at 11 in the bisecting plane of the reflector and also in Fig. 4. The distance 2h 1  is made equal to #/2 at the highest frequency to be used and 2h 2  to #/2 at the lowest frequency, in addition h 1 /S 1  is made equal to h 2 /S 2 . The elements may be constructed of metal sheet, mesh, parallel tubes, or slotted sheet (Fig. 5, not shown). The elements 11 may also be replaced by the equivalent folded dipole form which is shown in Fig. 6.
Patent GB-1459291-A (GB)
Title: Super conductive magnetic separator
IPC: B03C1/02
Filed: 1974-02-14
Abstract: 1459291 Magnetic separators SIEMENS AG 14 Feb 1974 [14 Feb 1973] 6865/74 Heading B2J A magnetic separator comprises a carrier 2, e.g. a trough or conveyor, for supporting a mixture of particles 3 of different magnetic susceptibility; superconductive magnets 1a, 1b, arranged one above and one below the carrier 2; a drum shaped ferro-magnetic grid 4 positioned as shown with its wall between magnet 1a and the carrier 2, and mounted for rotation about an axis 4a; and a device 5 for flushing from the grid 4, e.g. by means of compressed air or water, magnetic particles which, when the separator is in operation, adhere to the grid under the influence of the field produced by the magnets 1a, 1b and are transported out of the field by the grid for discharge into a collecting device 6. The separator may include a plurality of drums with different grid formations (Figs 2a, not shown) and the arrangement may be such that the magnetic field strength increases in intensity in the conveying direction (Figs. 1a, 1b, not shown). Instead of the drum 4, a disc or a belt may be employed and such embodiments are described with reference to Figs. 3 to 5 (not shown).
Patent GB-815535-A (GB)
Title: Improvements in or relating to pulse code modulation sampling and encoding systems
IPC: H03M1/00
Filed: 1957-03-01
Abstract: 815,535. Pulse code modulation circuits. WESTERN ELECTRIC CO. Inc. March 1, 1957 [March 28, 1956], No. 6911/57. Class 40 (5). In a signal amplifying sequential coder in which repeated comparisons are made between a pulse sample of the signal to be coded and a single fixed reference potential, the sample pulse being doubled in amplitude between successive comparisons by means of an amplifier and a time-delayed feedback; the sample pulse is passed twice through the amplifier to achieve each doubling in amplitude and the amplifier reverses the phase of the pulse at each pass, thereby reducing the D.C. content of the pulse train. The amplifier and comparator are transistors. The signal to be coded, from microphone 6 and amplifier 8, is sampled by a gate 9 and passed to a grounded emitter transistor amplifier T1. The gate 9 is closed at the start of each coding period by a pulse from a generator 12 (which pulse also renders the transistor T1 conducting for the duration of the coding period), and opened after the sampling period by the same pulse applied over a delay circuit 35. The amplifier T1 has collector/base feedback through a device 5<SP>1</SP> having a delay time equal to half the interval between code pulses; and the gain of the amplifier is made equal to #2 by proportioning resistors R2 and R1 in the ratio of 1 : #v2. The coding period is long enough for the sample pulse to pass 10 times round the closed circuit of the amplifier T1 and delay device 5<SP>1</SP>; at each pass it reverses in phase, and after every two passes it has doubled in amplitude and has been delayed by one code pulse interval. A 5 digit code is envisaged. The output of the amplifier T1 is also applied to the base of a transistor T2, which with transformer 33 forms a blocking oscillator. The oscillator is normally quiescent due to bias from potential divider R12, R13, which determines the coding reference level. If the output of amplifier T1 exceeds this level, then the oscillator executes one full oscillation swing, thereby generating one code pulse at the output 20 and also applying a pulse to varistors V4, V5 to subtract the reference level from the sample pulse so that only the residue continues to circulate. At the conclusion of each 5 digit code group the amplifier T1 is cut off by the tuning pulse from generator 12 to prevent uncontrolled regeneration of the sample pulse. Specifications 657,251 and 815,536 are referred to.
Patent GB-515732-A (GB)
Title: A process for the preparation of sensitive colloid films
IPC: G03C1/04
Filed: 1938-03-07
Abstract: 515,732. Photographic light-sensitive material. CZEIJA, O., and LIERG, F. March 7, 1938, No. 7048. Convention date, Oct. 14, 1937. [Class 98 (ii)] Light-sensitive films are produced by adding one component for making silver halide to a solution of the carrier colloid in volatile organic solvents or mixtures of such, preparing film from this solution and treating with a solution of the second component in a solvent substantially incapable of dissolving the first component already present in the film. The carrier colloid may be cellulose esters or ethers which may not be completely esterified or etherified or artificial resins, including partially esterified artificial resins. One component is a silver salt such as silver nitrate and the other component a halide such as the halide of lithium, cadmium, and zinc. The light-sensitive material may be used with a support, or may be poured on to one or both sides of supports such as glass, celluloid, acetyl-cellulose, artificial resins, metals or paper. Union of the light-sensitive'layer and a cellulose support may be promoted by addition of a common solvent. A paper support may be coated with an intermediate layer of celluloid, or acetyl-cellulose treated with white or coloured pigments for example zinc white or baryta and dyestuffs to replace the bayta layer. In an example, acetyl cellulose containing 42 per cent. acetyl is dissolved in acetone and a solution of cadmium bromide and cadmium iodide added. A film is cast from this solution and is treated with a solution of silver nitrate in a mixture of aqueous ammonia and methanol. A solution for casting on to an acetyl cellulose support contains ethylene chlorhydrin and diacetone alcohol. The support and light-sensitive material may be cast in a double casting machine.
Patent GB-213414-A (GB)
Title: Improvements in steam superheaters for scotch marine boilers
IPC: F22G7/14
Filed: 1923-03-12
Abstract: 213,414. Geoghegan, E. A., and Kraemer, M. March 12, 1923. U-tube and like superheaters.-A steam superheater for Scotch marine boilers comprises a multiplicity of returnbend tubes E inserted through tubes D in the rear head of the boiler so as to extend horizontallv across the combustion chamber B. Horizontal inlet and outlet headers F, F<1> are connected to the top and bottom tubes which are also interconnected by vertical headers G. Division walls in the headers cause the steam to travel successively through each return bend tube of any group before entering the tubes of the succeeding group.
Patent GB-618776-A (GB)
Title: Improvements in and relating to a fuel pump
IPC: F02M37/20
Filed: 1946-03-07
Abstract: 618,776. Shafts &c. TRIGGS, W. W. (Carter Carburetor Corporation). March 7, 1946, No. 7097. [Class 80 (ii)] [Also in Groups XXVI and XXXV] An impeller 62 for a submersible pump and motor unit has a central hub 63 having an eccentric pin 64 which engages with a diametrically disposed slot in the end of the driving shaft.
Patent GB-470514-A (GB)
Title: Improvements in electrical protective arrangements
IPC: H01T1/14
Filed: 1936-03-09
Abstract: 470,514. Protective cut-out arrangements. FARRER, S., PAILIN, G., and FERGUSON PAILIN, Ltd. March 9, 1936, No. 7113. [Class 38 (v)] An excess-voltage protective arrangement for, for example, a 33kv. system and of the kind in which a line is momentarily earthed through a spark-gap, comprises in series with the latter, a high-speed, current-interrupting means adapted to operate to rupture the current immediately it begins to flow therein by reason of a surge or other over-voltage arc bridging the gap. The main spark-gap 9 has electrodes 8, 10 of the flattened -sphere type so as to be substantially independent of steepness of voltage-wave fronts, the electrodes being protected by a weather-hood 36 of metal or insulation serving also as an explosion chamber to eject foreign bodies attempting to short the gap. The electrode 8 is connected to the " line " terminal 1 by conductor bar 6 and stiffening tie 7 supported on an insulator 2 on an extension of the tank-cover 3 of the interrupter. The electrode 10 is connected by conductor 14 to the fixed contact 17 of the interrupter which, with the movable contact 18, is located in an explosion chamber 23 having a cross-jet passage or passages 25 for extinguishing the arc by an oil-blast when the contacts separate. The blast may alternatively be supplied from a pressure-reservoir. Contact 18 is normally held closed by a light spring 29 in a plunger 20 and is connected by flex 35 with the end of a solenoid coil 27, the other end of which is suitably earthed. The coil, plunger, guide tube 26, and yoke 28 are mounted on a base 31 supported from the cover 12 by two channel-section insulating strips 32. When a surge occurs, the gap 9 is bridged and current flows through the coil 27, causing separation of 17, 18 and formation of an arc which is at once put out by the blast, whereupon spring 29 recloses the contacts. An auxiliary gap 5, of greater length than 9, operates in the event of a superimposed surge occurring when the contact 18 is partly open, this gap being provided, if desired, with a hood such as 36. Means may be provided for engaging the plunger 20 to determine whether the contacts are free, and the coil and gaps may each be shunted by a resistance, a suitable material in the case of the gaps being that known under the Registered Trade Mark " Thyrite." The Specification also describes two other forms, Figs. 2, 3 (not shown), having different dispositions of the parts. In Fig. 3 (not shown) the auxiliary gap shunts the whole apparatus and, for E.H.T. systems, serially-connected units may be employed.
Patent GB-448288-A (GB)
Title: Improvements in or relating to the production of bright coatings of tin or tin alloys on iron and steel
IPC: C25D5/10
Filed: 1935-03-07
Abstract: 448,288. Electrodeposition of tin and tin alloys. THOMAS & CO., Ltd., R., Bush House, Aldwych, and KIEFT, A. W., Kendale, Hampstead Lane, both in London, and MEHL, E., 6, Claremont Villas, Mumbles, and SMETANA, O., 126, Eaton Crescent, both in Swansea. March 7, 1935, No. 7146. [Class 41] A thin layer of tin or a tin alloy is deposited on iron or steel strips or other articles; this is then heated above the melting point and quenched and a further thicker layer of the metal is deposited. Heating may be effected in oil, a molten salt mixture or a suitable gas. In an example the base metal is degreased electrolytically in an alkaline bath, pickled in 10 per cent sulphuric acid at 50‹ C. and a deposit of tin of 3 gms. per sq. metre is applied electrolytically. This is heated to 280‹ C. in a flux of zinc chloride and ammonium chloride and quenched in hot water and a further deposit of tin of 6 gms. per sq. metre is applied. This is also melted.
Patent GB-1298766-A (GB)
Title: Improvements relating to the manufacture of encapsulated semi-conductor devices including a plurality of semi-conductor wafers
IPC: H01L23/495
Filed: 1970-02-13
Abstract: 1298766 Lead-frames for semi-conductor devices SEMIKRON GES FUR GLEICHRICHTERBAU U ELEKTRONIC mbH 13 Fob 1970 [13 Feb 1969] 7179/70 Heading H1K Each position of a stamped or etched lead frame strip is designed to mount a plurality of semi-conductor elements. In the embodiments described the four diodes at each position are interconnected to form a bridge rectifier. Fig. 3 shows an arrangement in which the design of the position is asymmetric. Figs. 1 and 2 (not shown) illustrate arrangements with at least one line of symmetry. The Fig. 3 arrangement allows all diodes to be mounted the same way up. They are each seated on gapped regions of a connecting area associated with one of the conductors 43 and contact is made to their upper surfaces by respective fingers 41 associated with a neighbouring conductor 43 which is displaced slightly from the plane of the strip so that the diode may be slipped between and gripped by the two parts. One mounting point is indicated by circle 44. All the diodes may be secured simultaneously by immersion-soldering. The bridge may be encapsulated before or after removal of the webs 45, 47. If it is desired to bend the conductors to a position in which all come up out of the plane of the figure, this bending is accomplished before the diodes are put in position. In a variant the webs 47 are omitted and conductors 43 are used which are initially united with the sides of the "ladder". Fig. 1 has an entirely different layout but retains the feature that each diode is gripped between a gapped connecting area (which supports the diode) and an overlying finger. Each of the four conductors has at its end either two of the gapped connecting areas or two laterally extending fingers. The structure of Fig. 2 differs from those of the other figures in that each diode is mounted on a non-gapped mounting area and is gripped thereto by a finger laterally and vertically displaced from its position of formation by effecting two opposed right-angle bends in the associated conductor. The foil of the strip may be of copper, brass, or of ironnickel-cobalt alloy and may be tin-coated at least in the contact areas.
Patent GB-330007-A (GB)
Title: Improvements in or relating to carbonic anhydride (co) compressors
IPC: F25B31/00
Filed: 1929-03-05
Abstract: 330,007. Jennings, W. F. March 5, 1929. Cross-heads etc.; cylinders.-A refrigerating compressor for carbon dioxide comprises a solid drawn steel tube f attached to a base a formed of a hollowed ingot, and forming a guide for the trunk cross-head p and housing the compressor cylinder or liner i which rests on a shoulder h. The cover n is removable, allowing the motion work to be removed without breaking pipe connections. The cover is secured by semi-circular flanges 4 housed in an external groove of the tube f and carrying studs or bolts extending through the cover; the flanges are retained by a loose flanged ring 5. Gas is introduced by ports 8 and a valve s in the piston, operated from a cam surface on the connecting-rod; at the end of the stroke a second supply is introduced through ports 10, 13; delivery takes place through valves o mounted in the spring-pressed false head, and a port 14.
Patent GB-411463-A (GB)
Title: Improvements relating to automatic telephone systems
IPC: H04Q3/42
Filed: 1933-03-09
Abstract: 411,463. Automatic exchange systems. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, PATTERSON, W. G., 59, Grove Park Road, Mottingham, and DIXON, R. G., 162, Westmount Road, Eltham Park, all in London. March 9, 1933, No. 7196. Drawings to Specification. [Class 40 (iv).] Restricted-service subscribers, who may in some cases be permitted privileged connections by payment of an extra fee, have a rectifier connected in series with the meter. This rectifier, whilst not interfering with the operation of the meter by booster battery, prevents the operation of a relay in the first-codeselector circuit during the establishment of a call and this relay in turn prevents the operation of a polarized relay in the register-translator. These provisions result in that, for a restricted. service subscriber, calls to a zero operator produce a characteristic signal at that position or are routed to a different position, calls to a multi-fee exchange are routed to a special operator, and calls to special-service operators are prevented. The invention is described with reference to a system substantially identical with that shown in Figs. 4-6 of Specification 411,456. Specifications 411,461 and 411,462 also are referred to.
Patent GB-994865-A (GB)
Title: Needle thread tensioning mechanism for the needle thread of a sewing machine
IPC: D05B47/00
Filed: 1964-02-21
Abstract: 994, 865. Sewing machines. FRITZ GEGAUF A.G. BERNINA-NAHMASCIINENFABRIK. Feb. 21, 1964 [March 1,1963], No. 7422/64. Heading D1G. The normal annular thread-tensioning surface 21 of a sewing machine thread-tensioner disc 4 is interrupted by a gap 22 to permit the escape of particles removed from the thread. As shown, the thread tensioner is mounted on a horizontal axis, and gap 22 opens downwardly. A surface 23, coplanar with surface 21, may be provided in gap 22. Either one or both co-acting discs may have a gap 22. A tensioner may have one or more pairs of co-acting discs.
Patent GB-596844-A (GB)
Title: Improvements in or relating to resistance welding apparatus
IPC: B23K11/30
Filed: 1946-03-11
Abstract: 596,844. Welding. MALLORY METALLURGICAL PRODUCTS, Ltd., and TUCKER, N. A. March 11, 1946, No. 7465. [Class 83 (iv)] A resistance - welding electrode comprises a substantially flat rectangular metal block 1 with cutaway corners at one end 6, having a raised, flat, circular tip 4 at one end, buttressed by a curved surface 2 rising from a transverse arc at mid-length. Screws engaging holes 7 secure the block to a holder. In modifications, more than one tip may be provided, and the block may be fitted in a holder recess. Specification 596,845 is referred to.
Patent GB-593404-A (GB)
Title: Screw threaded insert for soft materials
IPC: F02F1/24
Filed: 1943-05-11
Abstract: 593,404. Self-tapping screws. ROSAN, J. May 11, 1943, No. 7505. Convention date, June 2, 1942. [Class 83 (iii)] [Also in. Groups XXV and XXVII] Screw-threaded inserts, for use in relatively soft materials such as aluminium and magnesium alloys, plastic products and wood, either as means for making a screwed connection or for plugging a hole, are locked by a serrated ring engaging the serrated flange 29 and are fluted as shown to render them self-tapping.
Patent GB-198468-A (GB)
Title: Improvements in or relating to tipping bodies for vehicles
IPC: B60P1/10
Filed: 1922-03-15
Abstract: 198,468. Ellis, F. E. March 15, 1922. Tipping-wagons.-In a tipping-wagon of the kind in which the body is mounted on a turntable to enable it to be tipped in any direction, a circular bracket b is secured to the chassis a and within it revolves a turntable c of channel section, the lower flange resting on a series of rollers d which may have ball bearings. To the upper flange are secured two longitudinal bearers e carrying a shaft f on which are pivoted rocker members g secured to the body h. The front ends of the bearers e are braced together and carry the shaft i of a known form of elevating gear comprising a screwed shaft l engaging a nut m pivoted to the body and bevel gears k, j on the shafts l, i respectively. Any other elevating gear, such as hydraulic, may be employed, and it may be operated by hand or by power from the engine of a motor vehicle through a flexible shaft. A platform n secured to the chassis supports the bearers e and the body when lowered and in the normal position, and studs o on the bearers are adapted to be secured to pivoted members p on the platform n to lock the bearers in the normal position. A spring plunger carried by the bracket b is adapted to engage one of a series of holes in the turntable c to lock it temporarily in any angular position. Pads carried by the bearers e supply lubricant to the turntable. The front of the body may be rounded off to clear the driver's seat. According to the Provisional Specification, a turntable plate has a flange surrounding the circular bracket, its centre is disced to rest on a ball bearing, and the pivotal shaft of the body and the shaft of the elevating gear may be carried by lugs extending from the plate.