baber/WOPTO huggingface dataset:
Patent GB-721764-A (GB)
Title: Improvements in or relating to telecommunication systems
Inventor: THREADGOLD RONALD
IPC: H04Q3/00
Filed: 1952-02-09
Abstract: 721,764. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Jan. 27, 1953 [Feb. 9, 1952], No. 3458/52. Class 40 (4). An impulse sender comprises two multivibrators MVA, MVB, either of which gererates the impulses, and a counter comprising gas - discharge tubes VKH, VK1 to VK10. The number of impulses transmitted is determined by a ground marking on one of the wires D1 to D10 in the counter. The multivibrators MVA, MVB oscillate at 10 c.p.s. and 30 c.p.s. respectively when enabled over contact C. When the sender is ready for use, contact A is closed and lead S is grounded. Means for controlling contacts A, B, C, D and lead S are not described. Contact B is womentarily closed and VKH strikes. Transmission starts when ground is removed from S and is applied to lead SMV. As shown, multivibrator MVA starts and pulses tube V5. Relay SP repeats the pulses to line L and to the trigger electrodes of all the counting tubes VK1 to VK10, the counting tubes being pulsed through a self-extinguishing tube VKD. Only VK1 responds to the first pulse, being primed by VKH which now extinguishes. Successive pulses strike tubes VK1, VK2 &c. in order. As each of the tubes VKH, VK1, VK2, &c. strikes and extinguishes, it is followed by a tube VNS, VN1, VN2, &c. so that tube V6 and relay SZA operate during a count. If, for example, D9 is marked, tubes VN9, VK10 are disabled when VK9 strikes, and counting stops. Tube V6 is cut off, relay SZA falls back and signals equipment (not shown) over SZ to connect ground to and to remove ground from lead SMV, thereby to stop the multivibrator. After an interdigited pause initiated by the release of SZA, contact B is momentarily closed again to strike VKH and to extinguish VK9 in readiness for the next digit. If none of the leads D1 to D10 is marked, counting tube VK10 is followed by VNOT, VKOT. Relay OT grounds lead FR to give an alarm. The tubes VNS, VN1, &c. may be replaced by rectifiers.
Patent GB-1445034-A (GB)
Title: Continuous production of polyesters
IPC: C08G63/78
Filed: 1974-01-25
Abstract: 1445034 Continuous preparation of polyethylene terephthalate MONSANTO CO 25 Jan 1974 03586/74 Heading C3R Polyethylene terephthalate is continuously prepared by subjecting terephthalic acid and excess ethylene glycol in a first stage to apressure of 0À5 p.s.i.g. (0-0À35 kg/cm.<SP>2</SP> gauge) and a temperature of 225-285‹ C. until completion of 75% or more but less than 95% of esterification, then subjecting the resulting low molecular weight polymer and bis-(#-hydroxyethyl) terephthalate in a second stage to a pressure higher than that in the first stage and a temperature of 250-300‹ C. until completion of 95-99% of esterification, and polycondensing the resulting polymer to form a high molecular weight polymer having a degree of polymerization of at least 80.
Patent GB-489510-A (GB)
Title: Improvements in or relating to end coupling devices for electric cables
IPC: H01R13/59
Filed: 1937-02-06
Abstract: 489,510. Two-part couplings. LIVERPOOL ELECTRIC CABLE CO., Ltd., FROST, J. T., and MILNER, R. F. D. Feb. 6, 1937, No. 3589. [Class 38 (i)] A cable coupling comprises a casing 2 within which the end of each cable 1 is secured and sealed and which is provided with the plug or socket contacts 9 to engage the contacts similarly attached to the other cable end. The cable anchoring means consists of a cone 6 that grips the spread ends 3 of the armouring of the cable against the internally coned end of the casing 2 or against a separate internally coned member 4 under the action of the bolts 7. The contacts 9 are secured in recesses in two blocks 10, 11 secured within the casing 2 by studs 12. Insulating compound is introduced into the casing 2 through a plug 14, a vent 15 being provided.
Patent GB-214371-A (GB)
Title: Improvements in or relating to stone crushing or breaking machines
IPC: A62B1/06
Filed: 1923-02-07
Abstract: 214,371. Drain, W. J. Feb. 7,1923. Crushers with vibrating jaws; grinding-surfaces. -Relates to stone crushing or breaking machines of the kind having serrated or like jaws formed by independent and renewable single tooth strips or units fitted to a recessed holder or back-plate. The several teeth are made replicas of each other to permit of complete interchangeability and are provided with studs or projections on the rear or base for securing them within the holder or back-plate. The ends of the teeth 10, Figs. 1 and 2, may be undercut to form inwardlyinclined lips or projections, and the teeth have studs or projections 17 to engage openings 16 in the back-plate 11 and receive nuts for securing the teeth in position. The rear flange 12 of the holder 11 is cut away to receive the ends of the teeth, and the front edge of the holder is left open and' fitted with a bar or plate 15 bevelled to engage the lips at the forward end of the teeth. The bar 15 may be secured to the holder by means of studs 17<1> on the bar engaging key slots on the holder, or the free end of the bar may be fastened by a bolt or screw 15A. The studs 17 may be of square or rectangular formation where they engage the openings in the teeth, and soft-metal may be used to produce a level facing against the holder when securing the teeth in position. In some cases, side wedges 19 are employed. The teeth may be of manganese or chrome steel and are applicable to any type of stone crushing or breaking machine.
Patent GB-539117-A (GB)
Title: Improvements in or relating to aircraft controls
IPC: B64C9/22
Filed: 1940-02-28
Abstract: 539,117. Controlling aircraft. TAMPIER, R. J. C. Feb. 28, 1940. No. 3653. [Class 4] [Also in Group XXX] An auxiliary aerofoil normally nested beneath the leading or trailing edge of a main wing but movable so as to be clear of the wing, is completely supported on one or more racks slidably mounted in guides in the main wing structure, the racks being geared to pinions by which the aerofoil may be extended and retracted. The aerofoil is tiltable relatively to the rack or racks when in the extended position. Fig. 9 shows a wing section in which an auxiliary aerofoil 16 is normally nested beneath the leading edge to complete the contour of the wing. The aerofoil is pivoted to racks 20, 21, one at each end of the aerofoil by which the aerofoil is projected and retracted. The aerofoil may be tilted as shown after or during its projection. Fig. 1 shows an aeroplane wing having two such aerofoils 16 17 at its forward edge and two additional aerofoils 18, 19 at the wing tips, the latter being movable in opposite directions by a hand-wheel 54' selectively clutchable to the operating gear for the aerofoils and the ailerons. The auxiliary aerofoils are each carried on two racks 20, 21, the outer ends of the racks being connected by a spar which carries two irreversible hinges 24 of the kind described in Specification 496,875. The hinges are controlled by racks 25, Fig. 2, linked as shown to a rack 40 engaging a pinion 41 having a dog clutch on each side of it. The pinion can be moved by linkage from the cockpit to connect it to either of two pinions 28, 43, the former engaging the rack 20. The pinion 43 engages a rack 48 connected by linkwork to a rack 52 engaged by a pinion rotated by a hand-wheel 54. The end aerofoils 18, 19 are tilted, but in opposite directions by connections to a handwheel 54<1> which at high speeds of the aircraft may be declutched from the aerofoil mechanism and used only for operating the ailerons. Alternatively a separate hand wheel may actuate the ailerons. The racks 20, 21 engage pinions 28, 29 on shafts 30, the two shafts on each wing being connected by bevel gears 31, 32. Each shaft 30 is movable by an electric motor 3 or it may be moved by hand. In their extended positions the racks 20, 21 are locked by levers 2 actuated from the cockpit. By clutching the pinion 41 to the pinion 43 during the extension of the racks 20, 21, the racks 48 being held stationary the aerofoils may be tilted as they are projected. Only one of the two hinges of each aerofoil need be irreversible or hinges similar to those described in Specification 499,503 may be used. A rear aerofoil normally nested beneath the trailing edge of the wing and actuated by similar mechanism also is described. The aerofoils 16, 17 may be tilted in opposite directions for lateral balancing. Fig. 11 shows a modification in which the aerofoils are triangular, the spar 23 of each aerofoil being pivoted about a vertical pivot 70 and connected by a short link 71 to the rack 20. The aerofoil is tiltable on the spar 23 by the controllable hinges 24.
Patent GB-414661-A (GB)
Title: Improvements relating to receptacles for metal sheets
IPC: B65D77/04
Filed: 1933-02-07
Abstract: 414,661. Receptacles for metal plates. LEWIS, A. S., and LEWIS, G. E., Glasfryn, Llangennech, Carmarthenshire. Feb. 7, 1933, No. 3728. [Class 18.] A receptacle for metal plates or sheets, such as tin plates or terne plates comprises an inner receptacle a of cardboard, fibreboard &c. with a lid c closed airtight by adhesive within the flange of the lid or by an adhesive paper &c. strip d, a rigid frame b formed, e.g. from wood laths, and an outer casing h of cardboard, fibreboard &c. with flaps i, j which may be secured by staples or stitching. A reinforcing band may be placed within or around the mouth of the inner container a.
Patent GB-588822-A (GB)
Title: Improvements in voltage regulators
IPC: G05F3/10
Filed: 1944-02-29
Abstract: 588,822. Automatic voltage regulators. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Feb. 29, 1944, No. 3730. Convention date, Feb. 6, 1943. [Class 38 (iv)] In a voltage regulator of the kind embodying combinations of resistances having different voltage-resistance characteristics, such as a Wheatstone bridge arrangement with pairs of opposite arms respectively comprising constant resistances and voltage dependent resistances, the latter consist of dry rectifiers of the selenium or copper oxide type arranged to be loaded in the blocking direction. Cooling means are provided to prevent overheating. In operation the normal voltage impressed on each blocking layer is somewhat above the blocking voltage when employed as a valve. A semi-conducting enamel may be used as the blocking layer. Specification 458,716 is referred to.
Patent GB-1129592-A (GB)
Title: Improved resilient suspension for land vehicle seats
IPC: B60N2/54
Filed: 1966-01-27
Abstract: 1,129,592. Resilient mountings for seats. G. MULOT. 27 Jan., 1966 [27 Jan., 1965], No. 3765/66. Heading A4U. A vehicle seat is pivotable about a front, transverse axis 1 and is resiliently supported at its rear on a precompressed block 2 of cellular rubber, the range of movement of the seat being limited by vertically spaced, adjustably positioned, deformable abutments 4, 6.
Patent GB-470079-A (GB)
Title: Improvements in the manufacture and production of dyestuffs
IPC: C09B47/067
Filed: 1936-02-07
Abstract: Chlorinated and brominated phthalocyanines containing more than one halogen atom per molecule are obtained by heating o-dinitriles of aromatic dicarboxylic acids or compounds capable of conversion into them, viz. phthalic imides or diamides and o-cyano-benzamides, with chlorinating or brominating agents containing no metal, such as free chlorine or bromine, sulphuryl chloride or chlorsulphonic acid. Condensing agents such as the anhydrous halides of iron, chromium, copper, aluminium and the metals of the 5th group may also be present, and metals capable of entering into the dyestuff or acting as halogen transferers, such as iron chips, copper or zinc powder. Diluents such as aromatic nitro-hydrocarbons and aliphatic or aromatic halogen-hydrocarbons may be used and increased pressure is advantageous.  In the examples: (1) phthalodinitrile is treated with bromine in nitrobenzene solution, and then with cuprous chloride and pyridine; (2) cuprous bromide or chloride, or cupric chloride, is added to phthalodinitrile in nitrobenzene and the mixture is heated with bromine; (3) bromine is added to a mixture of phthalodinitrile and aluminium chloride in nitrobenzene; (4) bromine in nitrobenzene is added to a mixture of phthalodinitrile, nitrobenzene and zinc chloride, oxide or acetate; (5) in the process of the previous example, 4-chloro-phthalodinitrile is used as starting material; (6) phthalodinitrile dissolved in trichlorbenzene is treated with chlorine in the presence of the double compound of carbamic acid chloride with zinc chloride or aluminium chloride; (7) phthalodinitrile, cuprous chloride and pyridine in trichlorbenzene solution are treated with chlorine; (8) chlorine under pressure is allowed to act on phthalodinitrile, copper powder, iodine and o-dichloro-benzene; (9) phthalodinitrile, zinc dust, sodium chloride and anhydrous iron chloride are treated with chlorine under pressure; (10) phthalodinitrile, aluminium chloride, sodium chloride and potassium chloride are treated with chlorine under pressure; (11) phthalodinitrile is heated with phosphorus oxychloride in presence of cuprous chloride, zinc chloride, aluminium chloride, or ferric chloride; (12) phthalodinitrile or o-cyanobenzamide is heated with sulphuryl chloride or sulphur monochloride; (13) phthalodinitrile is heated with phosphorus oxychloride; (14) phthalodinitrile and iodine in carbon tetrachloride are heated with chlorine under pressure; (15) 3 : 4-dicyandiphenyl with nitrotoluene and iodine is treated with sulphur monochloride and then with cuprous dichloride and pyridine; (16) phthalodinitrile is heated with cuprous chloride, antimony trisulphide and sulphuryl chloride.  The products may be finely divided by dissolving in concentrated sulphuric acid and pouring on to ice, or by grinding with salt.  Specification 410,814 and the Journal of the Chemical Society, 1934, p. 1016 et seq. are referred to.
Patent GB-371973-A (GB)
Title: Improvements in devices for supporting curtains
IPC: A47H15/02
Filed: 1931-02-06
Abstract: 371,973. Suspending curtains. KERSHAW (MACHINE-MADE BRASSFOUNDERS), Ltd. and BURGESS, E. C., Highgate Street, Birmingham. Feb. 6, 1931, No. 3825. [Class 52 (v).] In a curtain runner of the kind consisting of a U-shaped frame one or each arm of which carries a separately formed pin on which a roller is mounted, the frame 16 is of shallow channel section and the pin or each pins 6 is without a head, so that the roller 8 thereon can move endwise. The roller or each roller is wider than the space between the end of the pin and the other arm of the frame or between the ends of the pins to prevent the roller or each roller leaving its pin In the construction shown in Fig. 4, the roller 18 is of hollow formation. The pins may be riveted or welded to the frames. According to the Provisional Specification the pins may be headed.
Patent GB-1372724-A (GB)
Title: Detection of velocities of fluids in conduits
IPC: G01F1/7082
Filed: 1971-02-05
Abstract: 1372724 Ultrasonic fluid flow meters IMPERIAL CHEMICAL INDUSTRIES Ltd 21 Jan 1972 [5 Feb 1971 5 April 1971 20 Oct 1971] 4035/71 8658/71 and 48714/71 Heading H4D  The velocity of fluid in a conduit is determined by measuring the intensity of sound it produces with a directional sonic detector directed towards but spaced from the conduit by a gas filled gap so that the effect of unwanted noise transmitted along the conduit is reduced. The simplest form of apparatus has a single detector (Fig. 1, not shown), preferably sensitive to frequencies in the range 36 to 44 KHz, and spaced 1 mm. to 1 metre from the conduit. The detector may be shielded from extraneous airborne noises and may be provided with a sound collimating shield extending to the conduit. In the apparatus of Fig. 2, two detectors 10, 12 feed amplifiers and signal rectifiers 13, 14. Fluid at A produces sound signals with a certain variation in intensity and it is stated that similar signals are produced at B after a delay determined by distance AB and the fluid velocity. Signals from detector 10, 11 are therefore compared in unit 15 which introduces a varying delay in the signal from detector 10 until the signals match. The signals from detectors 10, 11 may be multiplied and the product integrated, the delay producing the maximum integrated product giving the time for the fluid to pass from A to B. The velocity can then be determined. Alternatively, the two signals from detectors 10, 11 may be recorded on a stereo tape and examined later to obtain the delay. A radiation source 20, detector 22, amplifier 23 and meter 24 may be provided to determine fluid density. The density and velocity are multiplied together in computer 25 to give mass flow rate. The apparatus may be used to control a process or give an alarm when a blockage occurs or when the flow rate is not at a desired value.
Patent GB-454921-A (GB)
Title: Improvements in electric heaters or radiators
IPC: F24H3/00
Filed: 1935-02-08
Abstract: 454,921. Electric radiators. THOMAS, B., and THOMAS, E., 34, Worsley Street, Hulme, Manchester, and THOMAS, A. B., 39, Hagley Road, Birmingham. Feb. 8, 1935, No. 4053. [Class 39 (iii)] An electric roomheater comprises heating elements d enclosed within a casing b, the front of the casing serving to radiate heat while openings h and k in the casing serve to permit convection heating by circulation of air in contact with and with free access to the heating elements. The opening h is provided with an adjustable cowl to vary the angle at which the air stream leaves the casing. The elements may be mounted on a frame carried by the casing which stands upon downward extensions of its sides. Alternatively the element supporting frame may be provided with legs and the casing may be supported on the frame. Specifications 318,291, [Class 39 (iii)], and 404,784 are referred to.
Patent GB-242134-A (GB)
Title: Improvements in drilling bits for use in rotary systems of deep well drilling
IPC: E21B10/62
Filed: 1925-02-14
Abstract: 242,134. Buchanan, A. T. Feb. 14, 1925. Bore-hole apparatus.-A rotary well-boring bit has a renewable cutting part 3 of carborundum, steel, &c. connected to the bit body as by a dovetail connection 4, and either bolts &c. 6 engaging bores in the two parts, or a flanged sleeve 10 and a nut 13. The lower end of the cutting part is dished or inwardly coned. A central water &c. passage 15 leads to ducts 18 connecting with, side grooves 16 forming return passages, thelower ends 19 of the grooves 16 being widened and deepened and their edges forming cutters.
Patent GB-510893-A (GB)
Title: Improvements relating to dental crowns
IPC: A61C5/73
Filed: 1938-02-10
Abstract: 510,893. Dental crowns. REICHER, A. GELER-. Feb. 10, 1938, Nos. 4254/38 and 4454/39. Drawings to Specification. [Class 81 (ii)] Porcelain coated metal dental crowns are characterised in that one or more holes are drilled in the front and if desired, also the sides, or grooves are engraved in the crown, or a wire net or wires are fixed to the crown, e.g., by soldering, and the so-treated part of which is then covered with porcelain and fired. The holes may be conical, i.e., narrowing towards the external surface of the crown, and may also be combined with the grooves. When holes are used porcelain may be applied also to the internal surface. The crowns may be of gold or platinum and the porcelain tinted.
Patent GB-1304020-A (GB)
IPC: B27B29/08
Filed: 1970-01-29
Abstract: 1304020 Sawmill log carriage GREENLEAF HOLDINGS Ltd 29 Jan 1970 [29 Jan 1969] 4341/70 Heading B5L A sawmill log carriage 14, Fig. 3, adapted to ride on rails 16, 17 to carry a log 1 past a pair of laterally spaced vertical saw blades 15, e.g. circular saw blades, includes chucking means for axially centering and securing a log in the carriage and indexing means mounted on the carriage remote from the chucking means and operatively connected to the chucking means so that the log can be rotated to a selected position and maintained in that position prior to its passage between the saw blades. In one embodiment the log 1 is carried between a pair of rotatable chucks on the carriage 14. One of the chucks 11, Fig. 2, is linked via pulleys 34, 35 and belt 38 to a shaft 30, and this shaft is in turn connected via sprockets 29, 32 and a belt or chain 33 to a rotatable shaft 24 carrying an indexing template 28. The template rotates with the log, and the log is held in a selected angular position by engaging a locking pin 41, Fig. 3, in a selected one of a number of radial slots in the template. The locking pin may be operated byanhydraulic or pneumatic cylinder 40 as shown or by a solenoid switch or manually operated lever. The template and log may be rotated by an hydraulic or pneumatic cylinder 44 and piston 45 coupled to the belt or chain 33, or by a solenoid valve, electric motor, or manually. The template 28 may be exchanged for one which provides for different angular positions. The shaft 30 may be omitted so that the chuck 11 and shaft 24 are coupled directly. In another embodiment the template 28 is replaced by a quadrant carrying a number of circumferentially spaced reed switches and the shaft 30 carries a pointer arranged to contact a selected one of these switches. The arrangement is such that when a reed switch in the desired angular location is selected a solenoid valve is opened which causes fluid to be fed to the cylinder 44 thus rotating the log, shaft 30, and pointer, until the latter contacts the selected switch. In a further embodiment similar to the last, the shaft 24 is omitted and the belt or chain 38 is driven directly. The sawmill may include limit switches which prevent turning or indexing of the log except when the carriage is in the loading and unloading position.
Patent GB-1118389-A (GB)
Title: Improvements in or relating to cutting devices for plastic sheets formed in a roll by rolling
IPC: B29C48/08
Filed: 1967-01-30
Abstract: 1,118,389. Cutting device. SEMPERIT OSTERREICHISCH-AMERIKANISCHE GUMMIWERKE A.G. 30 Jan., 1967 [31 Jan., 1966; 9 Feb., 1966], No. 4354/67. Heading B5A. A device for cutting a rubber or plastic mix formed on a roll into strips comprises two rotatable cutter discs inclined to each other, the gap between the discs being a minimum in the neighbourhood of the roll. The cutters 8 are rotatably mounted on bushes mounted on a spindle which passes through a bore in the bush inclined to its axis. One bush is rigidly attached to the spindle and the other keyed so that the disc separation can be varied and the spindle can be rotated by a lockable lever to adjust the position of the minimum gap. The discs are inclined to each other at an angle between 2 and 60 degrees. The plastics material is cut by the revolving discs which are spring biased against the roll, and as the closest point of the discs is normally just after contact with the roll, the plastics material 3a is compressed and drawn off the roll and on to shoot 9. The material may be cut into blocks by the additional use of a rotating paddle wheel shaped cutter 7, which is biased against the roll and provides transverse cuts in the plastics material.