baber/WOPTO huggingface dataset:
Patent GB-705236-A (GB)
Title: Improvements in or relating to electric motor control systems
IPC: H02P3/20
Filed: 1952-06-12
Abstract: 705,236. Control of A.C. motors. IGRANIC ELECTRIC CO., Ltd. June 12, 1952 [July 5, 1951], No. 14847/52. Class 38(3) Means for stopping a motor 1 by plugging and terminating the power supply when the motor has come substantially to a standstill and before it begins to rotate in a reverse direction comprise a coil 9 which is positioned upon the housing of the motor and has developed therein a voltage component indicative of the tooth ripple voltage, and therefore the speed, of the machine. The coil 9 is connected to a filter circuit 10 wherein voltage components other than the tooth ripple component are removed, the resultant speed signal voltage being amplified and then applied to the grid of a discharge valve 13 which is biased to cut-off. If the motor is operated at a speed above a predetermined value the output from the coil 9 is sufficient to render the valve 13 conductive so that a relay 8 is energized to close contacts 8b. When the motor speed drops to the predetermined value during plugging operation, however, the discharge valve 13 stops conducting and the contacts 8b open to de-energize the plugging contactor 4.
Patent GB-1484442-A (GB)
Title: Cistern valves
IPC: E03D1/32
Filed: 1975-04-10
Abstract: 1484442 Valves G C RUSSELL 10 April 1975 [10 April 1974 21 June 1974] 14850/75 Heading F2V In a float actuated cistern supply valve the degree of opening of the valve, and thus the noise, is limited by an adjustable stop 28 the head 29 of which contacts a nose on the float lever. Alternatively the end cap 23 may be adjustable and provided with a lock-nut. The plunger 16 is provided with a recess 34 to form a shroud around the inlet nozzle 10. The end face may be cut away at (35), Fig. 3 (not shown), to allow the liquid to flow more freely. A groove 50 may be provided to divert liquid passing between the plunger 16 and the casing 14.
Patent GB-1525709-A (GB)
Title: Thermo-electric generators
IPC: H01M6/36
Filed: 1975-04-10
Abstract: 1525709 Thermo-electric generators CHLORIDE SILENT POWER Ltd 1 April 1976 [10 April 1975] 14863/75 Heading H1B A thermo-electric generator comprising outer and inner tubes 13 and 12, the inner tube 12 having a closed end within the outer tube 13 and remote from the closed end being secured to the outer tube to form an annular region 26 between the two tubes, sodium in this annular region, which sodium when the generator is operating is partly liquid and partly vapour, a # alumina ceramic electrolyte 10 having a closed end positioned within the outer tube and over the inner tube. The open end of the ceramic tube dips into the liquid sodium in said annular region when the tubes are in an upright position with the closed end of the inner tube above the point where the inner and outer tubes are joined. The ceramic tube thereby separates two regions containing sodium liquid and vapour, a heat source 38 and heat sink 37, the heat sink being arranged to cool the outer tube and to cool also the region where the two tubes are joined and the heat source 38 being arranged to heat the inner tube. The electrolyte tube on its surface facing the cooled tube has a conductive coating 24, e.g. molybdenum or tungsten deposited by chemical vapour deposition which is porous to sodium and means for recirculating condensed sodium from the region between the electrolyte tube and the cooled tube to the surface of the electrolyte facing the heated tube, e.g. capillary means using a wick 16 of flame sprayed metal powder, woven metal mesh or thin layers of electrolytically formed iron foil with apertures therein or electromagnetic pumps. The heat source may be a heat pipe 18 working in conjunction with a fossil fuel burner or nuclear reactor at 500-1300 C. and the heat sink 37 may produce a temperature of 200-300 C. in outer pipe 13. The current produced may be removed from conductive coating 24 by collector 29. In an alternative embodiment, Fig. 3, the outer tube acts as the heat source and the inner tube acts as a heat sink utilizing the principle of a heat pipe.
Patent GB-1298727-A (GB)
Title: Polyesters
Inventor: HAMB FREDERICK LYNN
IPC: G03C1/795
Filed: 1970-03-26
Abstract: 1298727 Polyester films EASTMAN KODAK CO 26 March 1970 [4 April 1969] 14880/70 Heading B5B [Also in Divisions C2 C3 and G2] A polyester film is prepared by solvent casting a solution in a mixture of p-dioxane, methylene chloride, methanol, iso-propanol and t-butanol of the polyester obtained by polycondensing 1,1,3 - trimethyl - 5 - chloroformyl - 3 - (pchloroformylphenyl) indan and 2,2-bis-(p-hydroxyphenyl) propane. The solution is shaken overnight, filtered and coated on to poly-(tetrafluoroethylene) covered glass plates, cured at room temperature for 6 hours, heated at 40 C. for 30 minutes and then at 60-70 C. for 3 days. Finally, heating at 150 C. for 3 hours gives a water-white sheet of 4 mils thickness.
Patent GB-590679-A (GB)
Title: Improvements in or relating to guns for firing sub-calibre projectiles with disintegrating driving collars
IPC: F41A21/46
Filed: 1942-10-23
Abstract: 590,679. Ordnance; muzzle deflectors. BURNEY, SIR C. D. Oct. 23, 1942, No. 14888. [Classes 92 (ii) and 119] A sub-calibre projectile of the kind described in Specification 585,794, provided with disintegrable driving and guiding collars, the latter of which is per forated so as to allow the pressure gases access to the driving collar, is discharged from a gun having a deflector shield or cup member 8 attached to the end of the muzzle the interior wall of the cap being inclined outwardly in relation tc the muzzle, so that the driving band when detached is thrown forwardly in the direction of the projectile. The. angle of the deflector is related to the rifling of the barrel which determines the angle at which the fragments are thrown off. The deflector is screwed on to the end of the muzzle.
Patent GB-528990-A (GB)
Title: Improvements in or relating to an electric meter of the frequency measuring or discriminating type
IPC: G01R23/02
Filed: 1939-05-18
Abstract: 528,990. Current and frequency measurements. BENDIX AVIATION CORPORATION. May 18, 1939, No. 14893. Convention date, May 19, 1938. [Class 37] A frequency discriminating meter applicable for measuring the relative magnitudes of current components of different frequencies or for measuring variations of frequency from a standard comprises two windings 17, 19 on an iron core 10, Fig. 2, in the airgap 11 of which is a moving coil 13 carrying a pointer 14. The terminals b, c, Fig: 1, of the windings 17, 19 are connected together and to one end of the moving coil 13, the other end of which is connected to one terminal e of the source of A.C. under examination. The other terminals a, d of the windings 17, 19 are connected through variable condensers 21, 22 to the other terminal f of the source. The circuit A, comprising the moving coil 13, winding 17, and condenser 21, is tuned to one predetermined frequency, and the circuit B comprising the moving coil 13, winding 19, and condenser 22, is tuned to a different frequency. Currents in the circuits A, B tend to cause deflections in opposite directions, the actual deflection being a measure of the ratio of the current strengths at the two frequencies. For measuring drift from a predetermined frequency the circuits A, B are tuned to frequencies on opposite sides of the standard frequency. The condenser 21 may be calibrated to indicate the resonant frequency of the circuit A. By adjusting this condenser to give the maximum deflection the frequency is indicated.
Patent GB-794207-A (GB)
Title: Improvements in and relating to electromagnetic radiation devices
IPC: A01D78/00
Filed: 1955-05-24
Abstract: 794,207. Utilizing electromagnetic radiations for gauging. INDUSTRIAL NUCLEONICS CORPORATION. May 24,1955 [June 7, 1954], No. 14996/55. Class 40 (3). Material such as steel, brass, &c., may have its thickness, composition or profile gauged by spacing it between a detector and a radioisotope such as Sr 90 (strontium) or Tl 204 (thallium) emitting beta rays, a target of aluminium, carbon, iron or copper being positioned between the radioisotope and the material to shield the material from and absorb at least 98 per cent of the emitted beta rays, so that electromagnetic radiation emitted from the target as a result of electrons colliding with the target nuclei will have a predetermined average energy. In operation, Fig. 1, the target 17 is between the material 11 and the radioisotope 15, the majority of the electromagnetic radiation from the target 17 passing through material 11 whilst the beta rays are stopped. The radiation from the material 11 passes into an ionization chamber 13, the output from which is carried into an amplifier 19 to a meter 21. This meter 21 is calibrated from a curve, Fig. 2 (not shown) which compares material thickness against the ratio of ionization current with material thickness to ionization current without the material. The readings of this meter 21 may be recorded on strip paper. Increase in the atomic numbers of the target and material results in radiation of increased average energy and increased stopping power, respectively. Detectors are used for particular energies by proper choice of an ionization chamber, Fig. 6 (not shown), and such chambers may be filled with argon, krypton or xenon.
Patent GB-573700-A (GB)
Title: Improvements in and relating to optical or like projectors
IPC: G03B21/16
Filed: 1943-09-14
Abstract: 573,700. Optical projectors. MARTIN, B. Sept. 14, 1943, No. 15074. [Class 97 (i)] An optical projector for the projection of screen images from a stationary kinematograph film comprises a casing 9, a film-carrier 32, an optical projection system which consists in a frontal truncated ellipsoidal reflector 1 and a rear spherical reflector 2 disposed so that the source of light 3 is placed at the focus of the frontal reflector and the centre of curvature of the rear reflector and a cooling cell 31 containing liquid positioned before and in close association with the film-carrier. An inner truncated ellipsoidal frontal reflector 4, alone or in association with an axially-disposed refracting system 5, may be used, and the reflectors may be sectored as described in Specification 567,154. The cooling cell, Fig. 2, has plates of glass or quartz 37 and 38 spaced apart in a frame 33, the space being filled with air-free water. A storage tank 36 is mounted above the cell and is connected thereto by pipes in such a manner as to give a thermosiphonic circulation, and a liquid-sealed breathing device is fitted, or a pump may be used to give forced circulation. A highly concentrated beam of light may be passed through the film, giving a long throw and high illumination without damage to the film. Specifications 267,171, 274,202, [both in Class 97 (i)], 340,522 and 360,910, [both in Group XI], are referred to concerning the optical system and 327,129, [Class 97 (i)], concerning the cooling cell.
Patent GB-782631-A (GB)
Title: Improvements in and relating to heat exchange tubes
IPC: B21C37/22
Filed: 1956-05-15
Abstract: 782,631. Making finned tubes. BROWN FINTUBE CO. May 15, 1956 [May 31, 1955], No. 15092/56. Class 83 (2). [Also in Group XIII] A method of making internally finned heat exchanger tubes comprises the steps of providing a plurality of open channel-section fin members 11, the total width of the base portions 13 of the fin members being substantially equal to the internal circumference of the tube 10, and assembling the fin members within the tube with the base portions held in contact with the inner surface of the tube by forces exerted by the fin members against each other. Fin members providing varying lengths of fin within the same tube may be used (see Figs. 5, 6 and 7, not shown). The base portions 13 of each fin member are arcuate to conform to the inner surface of the tube, the channel section being rolled in two operations as indicated by Figs. 2 and 3 respectively. The angle between the leg portions 12 of each fin member is such that contiguous legs of adjacent fin members are urged into firm contact with one another when assembled within the tube. In the preferred arrangement, the assembly of fin members 11 is supported on a mandrel 16 (Fig. 4) which need not be of circular cross-section, and thereafter inserted into the tube, the mandrel then being withdrawn. The fin members may be brazed only to the tube by their base portions, or they may be brazed to each other and to the tube, or, since the fin assembly is self-supporting within the tube the brazing step may be omitted. For bonding together ferrous tubes and fins, copper brazing is preferred the copper being applied to the contacting surfaces before the brazing step by plating, by applying a metallic copper paste or powder, or by inserting copper wires in the spaces 18 between the base portions of adjacent fin members. For non-ferrous tubes, silver soldering or brazing is used, the assembly after tinning being heated either in a furnace, or by heating the tube progressively by means of a torch, or by an electric heating element, or by means of a ring burner on the exterior of the tube or by induction heating.
Patent GB-682214-A (GB)
Title: Improvements in or relating to electric ampliflers with automatic gain control
Inventor: DALY CHARLES TREVOR
IPC: H03F1/54
Filed: 1950-06-16
Abstract: 682,214. Carrier transmission. STANDARD TELEPHONES & CABLES, Ltd. June 16, 1950, No. 15107/50. Class 40 (iv). In substituting a spare amplifier in a carrier current communication system including amplifiers the gains of which are pilot controlled, the gain control thermistor of a spare amplifier 9 is first fed from a manually adjustable source 25 and then by a pilot-controlled source 21 after the substitution of amplifiers has been effected. In a preferred manner of substitution incurring less risk of a gain surge, a power supply A, Fig. 1, is adjusted to equal the output of pilot source 21 and is switched to maintain the gain of amplifier 52. The disconnected pilot source is reduced to zero, connected to a probe thermistor 23, which is plugged into a jack 16, and is again given control by reducing the output of power source A to zero. The power supplied is then measured. Thermistor 15 is then again fed from source A, thus freeing the probe thermistor 23 which is supplied with the measured current above from the source B and inserted in parallel with the thermistor 17 in the spare amplifier. Finally, the amplifiers are switched by the U links 7, 8, 14 and control is taken over by the pilot-controlled source. Attentuation networks for insertion in the heater circuits for obtaining more uniform performances from the separate thermistors are described with reference to Fig. 3 (not shown). Specifications 613,642 and 682,189 are referred to.
Patent GB-1048660-A (GB)
Title: Method and apparatus for testing rod-like articles
Inventor: KAEDING HEINZ
IPC: A24C5/34
Filed: 1961-07-07
Abstract: 1,048,660. Testing cigarettes. K. KÍRBER. Aug. 22, 1962 [July 7, 1961; July 5, 1962], Nos. 15211/66 and 15212/66. Divided out of 1,048,652. Heading A2C. The Specification describes the same apparatus as that described with reference to Figs. 1-3, 6-8, 10, 11 and 17 of Specification 1,048,652 but the claims are directed to method of testing open-ended rod-like articles, having an enclosing wrapper, comprising conveying a continuous series of articles transversely to their axes on a conveyer drum having a plurality of periphally spaced conveying grooves in which the articles are held during conveyance, testing each successive article by applying different pressures internally and externally of the wrapper, retaining the articles in the grooves after the testing operation and causing air pressure jets controlled by the testing response to effect a rejection of faulty articles.
Patent GB-1138312-A (GB)
Title: Method of manufacturing super-conducting bodies
IPC: H01L39/00
Filed: 1966-04-06
Abstract: 1138312 Coating with metals ALLMNNA SVENSKA ELEKTRISKA AB 6 April 1966 [9 April 1965] 15239/66 Headings H1A A5 and A4D A super-conducting body of e.g. Nb 3 Sn is formed by plasma spraying on to a support. The coating may be heated. The powder is fed to the spray gun either as a mixture of Nb and Sn or as a Nb3Sn powder. A magnet in the form of a spiral may be formed by spraying on to a rotating cylinder and simultaneously spraying an insulating material e.g. Nb or Al 2 O 3 .
Patent GB-515098-A (GB)
Title: Manufacture of azo-dyestuffs
IPC: C09B29/32
Filed: 1938-05-23
Abstract: 515,098. Dyes. SOC. OF CHEMICAL INDUSTRY IN BASLE. May 23, 1938, No. 15308. Convention date, May 22, 1937. [Classes 2 (iii) and 15 (ii)] Azo dyes are made by coupling a substituted perinaphthinadandione with a diazo compound or by coupling a diazotized aminoperinaphthindandione with a coupling component. The dyes which contain at least one group capable of binding metal in complex union may be treated with agents yielding metal in substance or on the fibre. The metal compounds may be used for dyeing textiles, leather, varnishes, masses of various kinds, e.g., spinning masses, resins, artificial resins or gelatine or as pigment dyes. In examples, the following dyes are described (1) and (2) 4-nitro-2-aminophenol-6-sulphonicacid# 5-nitroperinaphthihdandione and the product treated with chromiium fluoride, (3) 2-aminophenol-4: 6-disulphonic acid # 5 - nitroperinaphthindandione treated with copper sulphate, (4) and (5) 2 - aminophenol - 4 -sulphonic acid# 5 - oxyperinaphthindandione treated with chromium formate, (6), (7) and (8) 4-nitro-2-aminophenol- 6 -sulphonic acidly## 5-oxyperinaphthindandione treated with chromium formate or with cobalt sulphate and copper sulphate, (9) 4-chlor-2- aminophenol - 6 - sulphonic acid# 5 - oxyperinaphthindandione # aniline - 2 : 5 - disulphonic acid, (10) 5-aminoperinaphthindandione# 1- naphthol-4-sulphonic acid, ,(11) and (12) '4- nitro - 2 - aminophenol - 6 - sulphonic acid# 5-aminoperinaphthindandione and the product treated with chromium fluoride, (13) 4- chlor - 2 - aminophenol - 6 - sulphonic acid# 5 - aminoperinaphthindandione# aniline - 2 : 4- disulphonic acid, (14) and (15) 2-aminophenol 4: 6 - disulphonic acid#5 - aminoperinaphthindandioneresorcinol and the product treated with cobalt sulphate, (16) and (17)'4-chlor-2- aminophenol# perinaphthindandione - 5 - sulphonic acid and the product treated with nickel sulphate. A table showing the properties of further mono- and disazo dyestuffs is given. Specifications 12249/15 [Class 2 (iii)], and 514,850 are referred to. The Specification as open to inspection under Sect. 91 comprises the manufacture of azo dyes wherein at least one of the components taking part in the coupling is a substituted perinaphtindandione. This subjectmatter does not appear in the Specification as accepted.
Patent GB-378371-A (GB)
Title: Improvements in and relating to loud speakers
IPC: H04R1/02
Filed: 1932-05-30
Abstract: 378,371. Sound - magnifying appliances. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Scheldorf, M. W. ; 125, E. Bettlewood Avenue, Oaklyn, New Jersey, U.S.A.) May 30, 1932, No. 15316. Convention date, May 28, 1931. [Class 13.] The horn of a portable loudspeaking apparatus is built up of two sections 14, 15, the housing 16 for the sound reproducing unit being secured to the smaller end of section 15 whilst the larger end of section 14 is permanently secured to one of the members 11 of the carrying case. The sections are held together by eye-bolts 20 and are adapted when dismantled and housed within the carrying case to be nested one within the other.
Patent GB-457337-A (GB)
Title: Improvements relating to dynamo regulators
IPC: H02P9/22
Filed: 1935-05-25
Abstract: 457,337. Automatic regulators. C.A.V.- BOSCH, Ltd., and GLASER, W. H., Warple Way, Acton, London. May 25, 1935, No. 15318. [Class 38 (iv)] A generator regulator of the carbon pile type comprises an electromagnet l the plunger k of which operates the pile a through a lost motion connection o, q. By this means the pile is not operated until the generator reaches a predetermined voltage. The plunger is mounted by means of diaphragms m and is held in the upper position by a spring n. The initial pressure on the pile may be adjusted by means of a cap g.
Patent GB-351195-A (GB)
Title: Improvements in automatic stops for gramophones and like sound reproducing machines
IPC: G11B17/02
Filed: 1930-05-19
Abstract: 351,195. Gramophones. DECCA GRAMOPHONE CO., Ltd. and COZENS, G. A., 1, Brixton Road, London. May 19, 1930, No. 15369. [Class 40 (ii).] An automatic stop mechanism for a gramophone comprises a brake adapted to be released by movement of the tone-arm which, during the playing of a record, moves a controlling lever by means of a friction clutch. The controlling lever is given an abnormal movement when the stylus enters a run-off groove at the end of a record so that it is brought into such a position that when engaged by a cam on the turntable spindle it is moved to allow release of the brake. A bar 3 connected to the tone-arm 2 is provided with a pin 4 engaged by a slot 5 in a lever 6 which has a boss 7, Fig. 9, freely mounted on a stud 8. A controlling lever 10 is pivoted on the boss 7 and a friction clutch comprising a fibre washer 11 and a spring 12 is interposed between the levers 6, 10. A brake lever 22 is pivoted on a pin 25 and has a tooth 26 which can engage with a latch 28 to hold the brake in the off position, shown in Fig. 3, against the action of a spring 29. A pawl 33 is pivoted on a pin 34 carried by the latch 28, and during playing of a record a spring 34<1> holds the pawl 33 with its end 37 bearing lightly on the smooth edge of a tappet 16. Connected to the lever 6 is a member 40 adapted to engage an upstanding lug 46 on the brake lever 22 to move the lever 22 into the off position for engagement with the latch 28. The lever 10 has a fibre block 43 at its free end which may be engaged by a cam 44 or the turntable spindle 45. When the tone-arm is moved to the periphery of a record preparatory to a playing, the member 40 strikes the lug 46 to move the brake lever 22 into the off position and bring it into engagement with the latch 28. During playing of the record, the tone arm moves in a clockwise direction as viewed in Fig. 1, and the finger 40 recedes from the brakelever 22, which is held by the latch 28. The lever 10 also moves towards the cam 44. When the stylus reaches the run-off groove the lever 10 makes an abnormal movement, so that the tappet 16 is withdrawn sufficiently to enable the pawl 33 to be moved by the spring 34<1> so as to bring its end 37 into engagement with the tooth 18 of the tappet 16, as shown in Fig. 3. When next the cam 44 operates the lever 10 it is moved to such an extent that the latch 28 is rotated out of contact with the tooth 26 of the brake lever 22 which is then brought into engagement with the turntable by the spring 29.