baber/WOPTO huggingface dataset:
Patent GB-729111-A (GB)
Title: Improvements in and relating to frequency changes for radio receivers
IPC: H03D7/10
Filed: 1949-11-29
Abstract: 729,111. Superheterodyne circuits. BRITISH COMMUNICATIONS CORPORATION, Ltd., and HEFTMAN, T. S. Feb. 28, 1951 [Nov. 29, 1949], No. 30626/49. Class 40 (5). A frequency-changing arrangement for changing a wanted signal of frequency f to an intermediate frequency f2, while reducing interference occurring on the image frequency f3, comprises an oscillator of frequency f4, such that (nf4 # f1)=f2=(nf4 # f3), where n is an integer and may be unity; a mixer in which the oscillator harmonic nf4 is mixed with the signal and image to produce the I.F. signal f2, and two circuits traversed by currents at the frequencies of those flowing in the mixer: the first circuit being the I.F. output circuit and tuned to the frequency f2, whereas the other circuit is tuned to a frequency f5, where f5=(mf4 # f3) and f5 > f2 and m is an integer which may be unity, but differs from n; the circuit tuned to f5 being coupled to the input of the mixer so that oscillations of frequency f5 are mixed with the oscillator harmonic pf4-p being an integer which may be unity and equal to m or n, such that (pf4 #f5) =f2-the further oscillations so produced at the frequency f2 being substantially in antiphase with the oscillations produced by mixing the image f3 with the oscillator harmonic nf4. In the embodiment shown, a signal at, for example 105 Mc/s. is applied via a tuned input circuit 12 to the grid of, a pentode mixing valve and an I.F. output at 5 Mc/s. is obtained from the anode by means of a tuned circuit 24; the image frequency is then 95 Mc/s. Local oscillations at 50 Mc/s. are applied via a tuned circuit 21 to the screen of the valve, the non- linearity of which is utilized generate the requisite harmonics, the second (n=2) being required to produce the intermediate frequency from the signal. The oscillator also beats at fundamental frequency (i.e. m=1) with the image signal, to produce a beat frequency of 45 Mc/s. which is developed in a circuit 15 tuned to this frequency and which is located in the cathode lead of the m xing valve. A component of frequency 45 Mc/s. is thereby fed back to the grid and by beating with the fundamental oscillator frequency (p=1) produces further intermediate frequency oscillations in the anode circuit which are in antiphase with those produced directly, between the image frequency and the second harmonic of the local oscillations. The feedback may be adjusted by means of a tap 16 on the circuit 15. The Specification also contemplates the use of mixers of the crystal type.
Patent GB-714564-A (GB)
Title: Improvements in or relating to method and apparatus for the ultrasonic inspection of solid objects
IPC: G01N29/04
Filed: 1952-12-03
Abstract: 714,564. Ultrasonic couplings. SPERRY PRODUCTS, Inc. Dec. 3, 1952 [Jan. 15, 1952], No. 30644/52. Class 40 (4) [Also in Group XXXVIII] A method of inspecting or testing an object 10 for defects such as a very shallow discontinuity 11 (see Groups XXXVIII) comprises generating surface waves along the respective surface of the object by transmitting ultra,- sonic vibrations to said object at an angle of incidence #<SP>3</SP> greater than the critical angle for shear waves within the object. A quartz crystal 15 fed by a pulse generator 16 is supported on a coupling wedge 20 at an angle #<SP>3</SP> to the surface 12 such that shear waves (and, therefore, the faster longitudinal waves) are totally reflected and only surface waves, Fig. 5 (not shown), are set up in the object 10. The critical angle for steel using a lucite wedge is stated to be 57 degrees and the angle #<SP>3</SP> in this case must, therefore, be greater than 57 degrees. Specification 663,064 is referred to.
Patent GB-175005-A (GB)
Title: Improvements in water circulation systems for the cooling of internal combustion engines
IPC: F01P3/20
Filed: 1920-11-01
Abstract: 175,005. Abbott, H. A. Nov. 1, 1920. Cylinders, cooling. - A partial vacuum is - created in the top of the radiator by connecting it by a pipe 8 with the induction pipe, and an aerated column of water is drawn into the radiator through the pipe 4 from the top of the cylinder jacket. The lower open end of the pipe 4 is near the bottom of a vessel 3 to which the pipe 2 is attached, and air is conducted by a pipe 6 into the end of the pipe 4. In an alternative arrangement the bottoms of the chamber 3 and of the radiator are connected, the top of the cylinder jacket communicating with the top of the radiator and the middle of the chamber 3, and the exhausting pipe 8 communicates with the top of the chamber 3 and of the radiator. The filler cap of the radiator may be transparent.
Patent GB-470605-A (GB)
Title: Improvements in or relating to oil burners
IPC: F23D5/00
Filed: 1936-11-11
Abstract: 470,605. Liquid-fuel burners. SENIOR, A. I. Nov. 11, 1936, No. 30816. [Class 75 (i)] An oil-fuel burner for use in domestic cooking ranges or stoves and for heating drying chambers comprises a burner pot 16 mounted by a stem 17 in an enlargement 10A of a horizontal cylindrical chamber 10 which is closed at its front end 13 and opens at its rear end into the stove. Air supplied through passages 29 to a detachable casing 12 enters the chamber 10 partly through two holes in a lid 15 covering an opening 14 in the chamber 10 and partly through radial passages 22 in an enlargement of the face plate 11 by which the chamber is secured to the stove. One hole 20 in the lid 15 is preferably triangular in section and tapers downwardly so as to cause the entering air to whirl over the pot 16. The other hole surrounds a drip-pipe 19 supplying fuel to asbestos or other refractory absorbent material in the pot 16. The air entering the passages 22 is regulated by rotating an apertured ring 24. Water may be supplied to a gutter 30 in the casing 12 to produce steam or air which is carried by the air into the chamber 10. Oil overflowing the pot 16 passes through a hole 18 in the stem 17 to a sump 32 in the casing 12 to which excess water also drains. The sump 32 is fitted with a drain nipple 33. The closure 13 may be removable.
Patent GB-743310-A (GB)
Title: Process for the production of dimethyl formamide by distillation
IPC: C07C233/00
Filed: 1953-11-06
Abstract: Dimethyl formamide is freed from impurities such as dimethylamine and ammonia by adding to the impure dimethyl formamide, in the proportion of up to 20 per cent by weight thereof, one or more primary monohydric alcohols having a lower boiling point than that of the dimethyl formamide, and subjecting the mixture to fractional distillation under normal or reduced pressure whereby the impurities distil over together with the added alcohol.  When almost all the alcohol has distilled over, the distillation is continued in vacuo, and pure dimethyl formamide is obtained as distillate.  Methanol, ethanol and butanol are suitable alcohols.  In an example, crude dimethyl formamide (90 parts by volume) is mixed with ethyl alcohol (10 parts), and the mixture is fractionated under normal pressure. Before the last traces of the alcohol distil over, the distillation is completed in vacuo and pure dimethyl formamide is obtained which can be employed as a solvent, e.g. in the spinning of polyacrylonitrile.
Patent GB-1396683-A (GB)
Title: Production of elongate tubular bodies of semiconductor material
IPC: C01B33/035
Filed: 1973-06-28
Abstract: 1396683 Semi-conductor tubes SIEMENS AG 28 June 1973 [31 Oct 1972] 30902/73 Heading C1A Semi-conductor tubes, e.g. of Si or SiC, are prepared by the deposition of the semi-conductor from a gas on to the inside of a heated graphite tube, the outside of which is flushed with a gas inert to the graphite. The gas may be SiHCl 3  or CH 3 SiCl 3  to form Si or SiC respectively, in H 2  as reactant-carrier. In the Figure the outside of the carrier body 6 is cooled by a flow of inert gas introduced at 8. The carrier body may be heated directly by connection to a voltage source through 2 and 3, or be heated indirectly. The thickness of the deposited layer and hence the body formed may be at least 1 mm. The carrier body may be removed by burning in air or by using a strongly oxidizing concentrated soln. Alternatively the carrier body may be removed by burning during the deposition process. The outer surface of semiconductor body may be doped by initially depositing a doped semi-conductor layer on the carrier prior to depositing a pure semi-conductor layer.
Patent GB-681465-A (GB)
Title: Casing scraper
Inventor: BAKER REUBEN CARLTON
IPC: B08B9/045
Filed: 1950-12-19
Abstract: 681,465. Cleaning pipes &c. BAKER OIL TOOLS, Inc. Dec. 19, 1950. No. 30954/50. Class 99 (ii). A body 10 attachable to a drill string C in a well casing B has at least one circumferentially-continuous groove 20 in which are located circumferentially - spaced scraper blades 18, which may have helical teeth 19 urged outwardly, e.g. by springs 40, to an extent limited by retainer members 25 between the blades and also positioned in the groove. Members 46, 47 may engage in grooves at the ends of the blades to provide driving connections when the body is rotated. There may be sets of longitudinally-spaced blades which are angularly displaced with respect to each other, and a body passage 11 for the circulation of a flushing fluid.
Patent GB-1028188-A (GB)
Title: Radial sealing means for rotary piston engines
IPC: F01C19/10
Filed: 1963-08-06
Abstract: 1,028,188. Rotary-piston I.C. engines. GOETZEWERKE FRIEDRICH GOETZE A.G. Aug. 6, 1963 [Aug. 4, 1962], No. 31060/63. Heading F1F. A radial seal at a piston corner of a rotarypiston I.C. engine is composed of two parts of different materials, A cap-portion of cast-iron having a Martonsitic texture for wear-resistant properties slidable over the multi-lobed chamber and a web portion which is a continuation of the cap portion faced on one or both sides by a web or webs of less dense material, e.g. aluminium or alternatively the cast-iron web portion may be inserted in a channel section of aluminium. The leading side of the aluminium portion relative to direction of piston rotation may have a wear-resistant oxide layer.
Patent GB-955819-A (GB)
Title: Process for the manufacture of copolymers of acrolein and acrylonitrile
IPC: C08F220/44
Filed: 1960-09-09
Abstract: Linear copolymers which are soluble in aqueous sulphurous acid are made by copolymerizing a mixture of acrylonitrile and acrolein containing at least 50% by weight of the latter by precipitation polymerization in water having a pH of 2.2 to 6.5 in the presence of a redox initiator containing at least one compound of the general formula R-OOH, wherein R represents an aliphatic, cycloaliphatic or araliphatic radical, e.g. tert. butyl, cumene, tetrahydronaphthalene and pinane hydroperoxides. As reducing agents for use with the hydroperoxides there are specified sodium metabisulphite, salts of sulphurous and pyrosulphurous acids, benzoin and sugar. Further quantities of monomers and initiator may be added to the reaction system as copolymerization proceeds. The resulting copolymers may be after-treated by acetalization, disproportionation, hydrogenation, hydrolysis and oxime formation. Fibres and films may be made from the copolymers by the process of Specification 904,392.
Patent GB-926264-A (GB)
Title: Improved coupling for transversely disposed rod-like members
IPC: E04G7/14
Filed: 1959-09-14
Abstract: 926,264. Rod and tube clamps. G. E. LOVELL, D. J. LOVELL, K. J. LOVELL, and J. W. G. STAPLEY, [trading as LOVELL BROS. & STAPLEY]. Sept. 1, 1960 [Sept. 14, 1959], No. 31222/59. Class 44. A coupling for two crossing rod-like members such as scaffold poles or television aerial components comprises a pair of similar channelsection components 5 having apertures 13 by which they may be slid on to a first tubular member 6, and toothed depressions 7 for gripping a second member 8. When the fixing bolt 10 is tightened the components 5 pivot round the member 8 and the edges of the apertures 13 grip the member 6. Reference has been directed by the Comptroller to Specification 777,837.
Patent GB-1293197-A (GB)
Title: Cooling or otherwise treating wires, or coatings on wires, strips and the like
IPC: C21D9/52
Filed: 1970-06-26
Abstract: 1293197 Coating wires by hot dipping AUSTRALIAN WIRE INDUSTRIES Pty Ltd 26 June 1970 [26 June 1969] 31229/70 Heading C7F A wire coated with e.g. Zn, Al or Cr, is quenched by passing it through coaxial tubes, 1, 2, 3, the tube 3 having bores 4, 4a for e.g. quenching water, and to prevent water entering the coating apparatus compressed air or other gas is supplied to a chamber 8. A baffle plate B deflects any water which does fall through the pipe 1.
Patent GB-508175-A (GB)
Title: Improvements in and relating to electric cut-outs
IPC: H01H85/055
Filed: 1938-10-28
Abstract: 508,175. Electric cut-outs. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 28, 1938, No. 31237. Convention date, Oct. 28, 1937. [Class 38 (i)] A fuse element comprises a band-shaped conductor 1 provided with staggered incisions or .notches, the incisions or notches being bridged by metal 2 electrically connected with the band and having a thickness and/or electrical conductivity such that, on overload, the bridging metal fuses first. The filling of the notches may be effected by pressing or soldering to the band a second band of the same width but without notches. The notched band is preferably made of silver and the solder of the eutectic tin-lead-alloy (70 per cent tin and 30 per cent lead). The element is for use in a high-tension cut-out of the kind in which the element is surrounded with a cooling and arc-extinguishing medium such as sand.
Patent GB-536951-A (GB)
Title: Improvements in or relating to the vulcanisation of rubber
IPC: C08K5/00
Filed: 1939-06-03
Abstract: 536,951. Salts of mercaptothiazolines. DU PONT DE NEMOURS & CO., E. 1. Dec. 1, 1939, Nos. 31263 and 31264. Convention dates, Dec. 2, 1938 and Jan. 12, 1939. [Class 2 (iii)] [Also in Group V] Sodium and potassium salts of 2-mercaptothiazolines are produced by treating 2-mercaptothiazoline with a solution of sodium or potassium hydroxide. The zinc, cadmium and lead salts are produced by precipitation from a solution of the sodium salt by adding a soluble salt of the metal. In addition to salts of 2- mercaptothiazoline, salts of the 4-methyl, 4-ethyl, 4-butyl, 5-methyl, 4, 4-dimethyl, 5, 5- dimethyl 4, 5 dimethyl, 4-methyl- 5-butyl, 4-methyl-5-propyl, 4-phenyl, 4-benzyl, 4-#- hydroxyethyl and 5-#-chlorethyl derivatives are mentioned. They may be used as vulcanization accelerators.
Patent GB-1045737-A (GB)
Title: Manufacture of thermoplastic chips
Inventor: UPTON EDWARD JAMES
IPC: B26D1/38
Filed: 1962-08-15
Abstract: 1,045,737. Turning. BRITISH CELANESE Ltd. Aug. 14, 1963 [Aug. 15, 1962], No. 31267/62. Headings B3B and B3T. Chips of nylon &c. are produced by rotating a piece 3 of the nylon &c., Fig. 1 (not shown), and removing chips with a tool 1 fed along the piece 3. Several tools spaced circumferentially and/or axially of the piece 3 may be used, the chips passing into a shoot 2 with a lid 5 and being collected in a bag 6. The nylon may be moulded or cast around a metal mandrel 4.
Patent GB-451275-A (GB)
Title: Improvements in self-filling fountain pens
IPC: B43K5/06
Filed: 1934-10-31
Abstract: 451,275. Fountain pens. SEARS, E. S., 23, Oaklands Avenue, Oxhey, Hertfordshire, and MABIE, TODD, & CO., Ltd., 133, Oxford Street, London. Oct. 31, 1934, No. 31281. [Class 146 (iii)] Relates to self-filling fountain pens. A movable tubular member 1, closed at one end and acting as a plunger, is connected to the nib-section 5 by a flexible tube or sac 3. The plunger, which is preferably made wholly or partly of transparent or translucent material such as glass or celluloid, is controlled in its movement by the resiliency of the flexible member, or by a spring 13 disposed inside or outside the flexible member or embedded in the wall thereof. An air-tube 6 is secured in an aperture in the feed-bar communicating with the ink-duct and extends into the reservoir to such a position that its end normally lies at a distance from the closed end of the plunger equal to or slightly greater than the stroke of the plunger. The parts are enclosed in an outer barrel 14 of vulcanite, opaque or figured celluloid, or the like secured to the nib-section and formed with an aperture at the rear end through which the rear end of the plunger extends. The barrel and plunger are provided with co-operating shoulders to limit the movement of the plunger, and the barrel acts as a guide for the enlarged part of the plunger, relative rotation being prevented, if desired, by the parts being formed of polygonal cross-section. The exposed part of the plunger is covered by a cap 20. According to a modification described in the Provisional Specification, the plunger reciprocates over a rigid tubular member integral with or secured to the point-section, a spring being provided to effect the return of the plunger to normal position.
Patent GB-1198194-A (GB)
Title: Improved Lubricating Assembly
Inventor: LICCARDI THOMAS VICTOR
IPC: F16N15/00
Filed: 1968-07-01
Abstract: 1,198,194. Lubricant. T. V. LICCARDI, S. N. STEEN, and E. J. GELB. 1 July, 1968 [12 July, 1967], No. 31299/68. Heading C5F. [Also in Division F2] A high temperature lubricant comprises a metallic dispersion medium, a protective colloid and a dispersed phase, said dispersion medium being a solid bonded to said surfaces at room temperature but which becomes liquid at said elevated temperature and wets said surfaces, said dispersed phase being a lubricative material which is solid at said elevated temperatures and of colloidal particle size. The dispersion medium is a metal alloy which may be a solder or a brazing composition and may be of lead-tin, copper-tin, lead-antimony, copper-antimony or lead-bismuth. The lubricative material may be molybdenum disulphide, graphite or a mixture thereof. The protective colloid is sodium silicate, lead oxide, potassium silicate or zinc oxide.
Patent GB-1152028-A (GB)
Title: Improvements in or relating to the Manufacture of Synthetic Crystalline Mordenite
IPC: C01B39/26
Filed: 1966-07-12
Abstract: 1,152,028. Crystalline mordenite. L'AIR LIQUIDE POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE S.A. 12 July, 1966 [12 July, 1965], No. 31346/66. Addition to 1,119,962. Heading C1A. Granular crystalline mordenite is obtained by agglomerating and heating an amorphous alkali metal aluminosilicate of formula 0À4- 1À6 M 2 O: Al 2 O 3 : 8-16 SiO 2 , mixing the agglomerates with water and sufficient alkali to give a pH of 11-13À3, and heating at a temperature of at least 100‹ C. under autogenous pressure which is at least atmospheric. The amorphous aluminosilicate may be obtained by precipitation from an alkali metal silicate, e.g. with SiO 2 /M 2 O of 2-3À8, and an Al salt, e.g. sulphate, chloride, nitrate, or an alum; or by the method of Specification 753,052. It may be compressed as a powder, moistened and formed into balls, or extruded as an aqueous paste optionally with 1-10% of a plasticizer (e.g. alkyl, carboxyalkyl or hydroxyalkyl cellulose, polyvinyl alcohol, bentonite, kaolin, colloidal silica or dilute Na silicate) to give wires which may be cut up. The agglomerates are heated at a temperature up to 800‹ C., preferably at least 100‹ C., e.g. 500-800‹ C. The hydrothermal treatment may be effected at 300‹ C. and 37 bars. The product may be washed, dried at 120‹ C., and dehydrated at 400‹ C. If Na aluminosilicate was used initially, the Na ions may be exchanged for ions of other alkali metals, alkaline earth metals, or hydrogen.
Patent GB-520360-A (GB)
Title: Improvements in registration number plates for motor vehicles
IPC: B60R13/10
Filed: 1938-10-29
Abstract: 520,360. Vehicle number plates. WASSELL, D. G. Oct. 29, 1938, No. 31371. [Class 3 (ii)] [Also in Group IV] A vehicle number plate comprises a basic sheet of cellulose acetate or celluloid, and cut-out characters of the same material but of different colour which are welded by means of a solvent of this material either directly to the basic sheet or to individual supporting sheets of the same material which are then welded by means of the solvent to the basic sheet. In the form shown in Fig. 2, characters e of white sheet cellulose acetate are welded by means of a mixture of acetone and ethyl lactate to black sheets b, c of the same material mounted on a base a. A border d of cellulose acetate is also welded to the sheets b, c. These sheets may be formed by spraying. In the form shown in Fig. 5, the characters e are welded to sheets g which are themselves welded to the basic sheet b, the sheets g being positioned by welded strips h, i.
Patent GB-160002-A (GB)
Title: Improvements in and relating to toothed gearing
IPC: F16D3/62
Filed: 1919-12-15
Abstract: 160,002. British Thotneon-Konaton Co., Ltd., (General Electric Co.). Dec. 15, 1919. Yielding-toothed wheels.-A gear-wheel having a rim capable of both radial and circumferential yielding under the control of separate spring- means comprises a plurality of parallel sections, each constituted by a toothed rim 21, a hub 13 with an integral flange 14, and side plates 15, 16 bolted thereto and engaging it by shoulders 18, 19. The rim has a web portion 23, wherein and in the plates 15, 16, between which it passes with.a small clearance, are formed aligned openings 25, 20, containing circumferential springs 27, preferably under sufficient initial compression to transmit normal load without yielding, Spring holders 26 bear on the parts 15, 16, 23 and have centring-posts 28, which serve also to limit the spring deflexion. A spring-retaining ring 29 is provided. Radial movement of the rim is permitted by clearance a and is limited by shoulders 23<a>, 15<a>, 16<a>. Radial springs 32 under definite initial compression are housed in sockets 33<a> in the hub-flange and press upon shoes 31, which bear on the web-member 23 and, by shoulders 35, on the outer faces of transverse slots in the hub-flange 14. The spring-shoes may be lubricated by waste oil from the shaftbearings, caught by a ring 37 and fed through passages 38, 41, 39, 10, by way of an annular chamber (not shown).
Patent GB-986727-A (GB)
Title: Improvements in link chains
IPC: F16G13/06
Filed: 1963-08-08
Abstract: 986,727. Chains. LINK-BELT CO. Aug. 8, 1963 [Feb. 25, 1963], No. 31401/63. Heading B8A. To facilitate the movement of lubricant to the pivot joints of a transmission, conveyer or like chain made up of plates 12, 12a, 14, 15 joined by pivot pins 16, the adjacent pairs of overlapping plates 12, 12a and 14, 15 are spaced apart by protuberances 36 on one of the adjacent overlapping plates. Preferably the protuberances are formed by indenting each of the outer plates 12 and 14 in a region midway between two pins 16, facing the ends of two successive inner plates 12a or 15. In the example shown the plates 14 and 15 are conventional and the plates 12 and 12a are provided (a) with abutment surfaces 28 to limit chain flexure and (b) with laterally extending flanges 19 provided with holes 21 for attaching articles to the chain.