baber/WOPTO huggingface dataset:
Patent GB-1440124-A (GB)
Title: Leakage detection and protection for electrical equipment
IPC: H02H3/16
Filed: 1973-06-11
Abstract: 1440124 Protective systems WESTERN INDUSTRIES (PTY) Ltd 11 June 1973 [13 June 1972 (2)] 27784/73 Heading H2K A leakage protection system has means such as alternately closed switches 5, 6 applying an alternating voltage through an impedance 4<SP>1</SP> to a conductive member 35, 36 which is part of the equipment powered by a power supply AA but is not part of the power circuit and not directly earthed. The alternating voltage is measured and applied to a comparator 8 which also receives an alternating reference voltage from a supply 30. The output signal of the comparator 8 is applied to a D.C. voltage level detector 11 which can (Fig. 4, not shown) include alternately switched transistors and which operate a control mechanism capable of shutting off the power supply.
Patent GB-616593-A (GB)
Title: A device for applying sectional snow chains to the wheels of motor vehicles
IPC: B60C27/08
Filed: 1946-09-17
Abstract: 616,593. Wheel tyres. ALMENT, E. W. Sept. 17, 1946, No. 27803. [Class 144 (i)] A tool for use in assembling a snow-chain around a wheel tyre comprises an arcuate spring steel or like resilient band a fitted at one end with a handle b and at the other end with a hook &c..d on to.which the leading end of one of the chain-straps e is attached, whereby the chain is drawn around the rim f and tyro g as the tool is pulled by means of the handle b.
Patent GB-681779-A (GB)
Title: Improvements in and relating to apparatus for and method of testing wire insulation
IPC: G01R31/02
Filed: 1950-11-14
Abstract: 681,779. Detecting and indicating insulation faults. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 14, 1950 [Nov. 16, 1946], No. 27820/50. Class 37. The insulation of a wire is tested by producing R.F. corona between the wire and an adjacent electrode whereby the voltage therebetween acquires a relatively low frequency modulation component as a result of insulation variations as the wire is traversed relatively to the electrode, which is demodulated to operate devices for indicating, recording, or counting weak spots in the insulation. An insulated conductor 1 is earthed and continuously wound past a small electrode 4 by a motor driven takeup reel 5, and other wires 7, 8, 9 may be simultaneously tested by paralleled electrodes 10, 11, 12. A parallel resonant circuit 13 comprising an inductor 14 and series connected condensers 15, 16, 17, 18 connected between the electrodes and earth is energized at its natural frequency (e.g. 400 kc/s.) by an inductively coupled oscillator 20 to develop a voltage of the order of 5000 volts which produces R.F. corona between each electrode and the associated wire. The variations in the insulation of the wires traversing the electrodes set up corresponding variations of the corona intensity, which modulate the voltage across the resonant circuit at a frequency of the order of 10 kc/s., the modulation amplitude being small when the insulation is good and increasing on the occurrence of weak spots. A portion of the modulated resonant voltage is tapped off between condensers 17 and 18, gridleak rectified by a triode 28 whose anode circuit is tuned by an inductor 36 and parallel condenser 37 to e.g. 10 kc/s., and the resultant modulation signal is again gridleak rectified by the triode 40 whose anode circuit is supplied from source 32 through a resistance 47 in series with a gas discharge lamp 46 shunted by a capacitor 48. When the insulation under test is good, the signal input to triode 40 is small and the valve passes anode current sufficient to energize the lamp 46, but the passage of poor insulation increases the input, reduces the anode current and extinguishes the lamp, while the sudden voltage rise at point 49 indicating the arrival of weak insulation energizes the grid of the normally cut-off triode 51 to operate a control relay 56 to e.g. stop the passage of the wire, a recorder 60, and a counting device 62 which may stop the wire after a predetermined number of operations by weak spots. The sensitivity of the discharge lamp is adjustable by condenser 48.
Patent GB-483243-A (GB)
Title: Improvements in or relating to the cooling fins of air cooled internal-combustion engines
IPC: F02F1/34
Filed: 1936-10-13
Abstract: 483,243. Cooling cylinders. ROWLEDGE, A. J. Oct. 13, 1936, No. 27823. [Class 7 (ii)] Separate cylindrical cooling fins E are fixed in the base of the recess in the head of a sleevevalve engine, by portions sunk in the surface thereof. Enlarged ends of the fins are secured in slots formed in the head by swaging over the edges. The lower parts of the fins are saw cut at intervals to facilitate their fitting. Cooling air is deflected into the recess by a baffle G, further fins D being cast in the head adjacent the sparking plugs C. In an aluminium-alloy head, the fins are preferably formed of substantially pure copper. Specification 455,664 is referred to.
Patent GB-200004-A (GB)
Title: Improvements relating to power navvies
IPC: E02F9/28
Filed: 1922-10-13
Abstract: 200,004. Blythe, T. S. Oct. 13, 1922. Scoop-arm machines.-In a power navvy with a bucket or scoop swinging in a vertical plane and having knives b depending from the bucket so as to cut during one stroke the clay to be removed in the next stroke, one or more transverse wires c, thin steel strips or the like are carried by the knives to cut the clay horizontally. More than one row of knives may be used, the knives of adjacent rows being staggered and the wires &c. may pass from one row to another. The knives may be rivetted or bolted to the bucket and may be of angle iron form.
Patent GB-1084939-A (GB)
Title: Semi-conductor arrangement
IPC: H01L21/60
Filed: 1966-06-22
Abstract: 1,084,939. Soldering. BROWN, BOVERI & CO. Ltd. June 22, 1966 [June 24, 1965], No. 27940/66. Heading B3R. [Also in Division H1] To secure a semi-conductor device to a housing member 9 of a material of markedly different thermal expansion coefficient from that of a mounting plate 8 to which the semiconductor is bonded, the mounting plate 8 is soft soldered at its centre to the member 9 and at its periphery to an annular washer 10 of like expansion coefficient to the plate. The washer is itself hard soldered to the housing member. The device 1 shown is an alloy junction silicon diode, the plate 8 and washer 10 are of molybdenum and the housing member 9 is of copper. 10 is secured to 9 by Ag-Cu solder and 8 to both 9 and 10 by Au-Sn solder. The member 9 forms the base of a sealed enclosure (not shown).
Patent GB-694018-A (GB)
Title: Improvements in pressure regulating valves for hydraulic brake systems
Inventor: CASTNER FRANK GARTLEY
IPC: B60T11/10
Filed: 1951-11-28
Abstract: 694,018. Hydraulic brakes. TIRIPS CORPORATION. Nov. 28, 1951, No. 27956/51. Class 103 (i). A device for insertion in the conduits leading from the master cylinder 10 to the wheel cylinders 23, 24, 30, 31 of vehicle hydraulic brakes whereby the conduit may be closed after pressure has been applied to the wheel cylinders so as to provide a parking brake, comprises a housing 17 having a central passage 15, 35, 19 therein, the central restriction 36 of which may be closed by a manually-operable valve cock 37. When it is required to operate the brakes for parking purposes, the cock 37 is closed and the master cylinder pumped several strokes until fluid passing by the by-pass channel comprising passage 50, non-return valve 59 and passage 60 has created a steady holding pressure of, say, 60 pounds in the wheel cylinders. To prevent this pressure from becoming excessive and exceeding about 90 pounds a second by-pass channel comprising passage 65, oppositely arranged non-return valve 74, of higher spring loading than the valve 59, and a passage 75 is provided. An air-bleed and filling channel (not shown) is provided leading into the bores 51 and 66 of each by-pass channel.
Patent GB-625914-A (GB)
Title: Improvements in stereophonic radio and the like apparatus
IPC: H04H20/88
Filed: 1946-09-18
Abstract: 625,914. Automatic volume control. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Sept. 18, 1946, No. 28011. Convention date, March 19, 1943. [Class 40 (v)] [Also in Group XXXIX] In a stereophonic transmission system using two separate radio-frequency channels, automatic gain control is applied to the receiver in such a manner as to equalize the two signal outputs. The load resistances 30, 31 and 40, 41 respectively of the detectors in the two channels are earthed at the centre points. The potentials across resistances 30, 40 are combined additively over resistances 19, 29 and applied as automatic gain control to the preliminary stages of both receivers. The potentials across resistances 30, 41 are combined over resistances 33, 43 and control the gain of a further valve 12 in the one channel, the gain of the corresponding valve 22 in the other channel being similarly controlled by a potential derived from the resistances 31, 40 via resistances 32, 42. In an alternative arrangement (Fig. 1, not shown), each channel includes a further rectifier for automatic gain control, being separate from the equalizing arrangements. Equalization may alternatively be obtained by controlling each of the valves 12, 22 from a rectifier in the other channel.
Patent GB-1021644-A (GB)
Title: Improvements in and relating to roller shutter electromotive drive units
IPC: F16H35/00
Filed: 1962-07-27
Abstract: 1,021,644. Toothed gearing. H. GROSS. July 27, 1962 [July 27, 1961], No. 28074/62. Heading F2Q. [Also in Division H2] A roller shutter electromotive drive unit includes an electric motor 3 driving an output shaft 41 connectible to the shutter, through an epicyclic reduction gear 2 comprising a plurality of first planet pinions 8 rotated by the motor shaft 5 and rolling inside and meshing with the internal teeth of a non-rotatable ring 9, and a plurality of second planet pinions 10 which are of equal number to and are coaxial and fast with the first pinions 8, the second pinions 10 rolling inside and meshing with the internal teeth of a rotatable ring 12 of smaller diameter than the non-rotatable ring 9 and fast with the output shaft 41. The planet carrier 6 rotates on bearings 7, 13 and as shown is fast with the motor shaft, but in Fig. 3 (not shown), the shaft extends through the carrier and has teeth meshing with the pinions 8. The unit includes a brake and a switching device 1 which automatically operate and switch off the motor after a predetermined number of revolutions; the switching device comprises two switches 48, 49 whose positions are adjustable by respective screw-threaded spindles 52, 53 and which are engageable by an arm 46 traversed by a similar spindle 44 rotated by gears 39, 40, 42.
Patent GB-449891-A (GB)
Title: Apparatus for casting metals
IPC: B22D18/04
Filed: 1934-10-01
Abstract: 449,891. Casting-machines. OESTERREICHISCH AMERIKANISCHE MAGNESIT AKT.-GES., Radenthein, Carinthia, Austria. Oct. 1, 1934, No. 28087. Void [Abridged as open to inspection under Sect. 91 of the Acts, April 23, 1935]. [Class 83 (i)] A mould 5 is supported on a base-plate 4 forming the mould bottom and pivoted at 8, in order that a hole 4a therein may be brought to register with a tube 2 through which metal may be admitted to the mould from a crucible 1 under the action of compressed air or inert or reducing gas admitted through an inlet 7, or may be moved so that it is sealed by the cover-plate 3 of the crucible. The crucible may be evacuated when the metal is melted therein. Magnesium or its alloys may be cast in the apparatus.
Patent GB-1494669-A (GB)
Title: Pipe joints
IPC: F16L21/035
Filed: 1976-07-01
Abstract: 1494669 Pipe joints ROLLS ROYCE Ltd 1 July 1976 [4 July 1975] 28202/75 Heading F2G A pipe joint 10 comprises a cylindrical male member 12 for insertion within a cylindrical female member 19, the male member 12 having formed therein an annular groove 14 containing two rubber 0-rings 15, 16 to provide a seal and a further annular member 17, e.g. a split-ring of polytetrafluoroethylene or brass to prevent or reduce contact between the male and female members 12, 19 and thus reduce friction and wear therebetween. If desired, the annular member 17 may be located between the 0-rings 15, 16.
Patent GB-939617-A (GB)
Title: Improvements in or relating to the extraction of aluminium
IPC: C01F7/062
Filed: 1961-08-03
Abstract: A slurry of alumina containing ore, e.g., bauxite, and caustic soda solution is preheated to 90 DEG -190 DEG C. whilst flowing at more than 0,7 m./sec. before digesting in autoclaves at a higher temperature.  The preheating is occasioned by single or multi-pass heat exchangers preferably of the 'stacked tube' type.  Unwanted primary natrolite is removed from the initial ore prior to the preheating stage by stirring a slurry of the ore in vats for 6-10 hours at 70 DEG -100 DEG C. when the natrolite is precipitated. Secondary natrolite may be removed similarly at temperatures above 120 DEG C. in vats placed between the heat exchangers or between the final heat exchanger and the first autoclave.  In Example 1, bauxite was mixed with a thick caustic dye, stirred for about 10 hours at 95 DEG -100 DEG C., passed through 9 fourpass tube heat exchangers at 1,5 m./sec. after which its temperature was 190 DEG C., and finally led into an autoclave where it was heated to 210 DEG C. for about 1 hour.
Patent GB-1461566-A (GB)
Title: Presensitised lithographic plates
IPC: B41N3/00
Filed: 1975-07-04
Abstract: 1461566 Supports for photo-resists S O LITHO CORP 4 July 1975 [1 Oct 1974] 28260/75 Heading G2C [Also in Division C7] Al or Al alloy is grained, anodized in an aqueous acid and then anodically treated in an alkaline metal salt solution e.g. Na silicate prior to application of a photo-sensitive lithographic material. H 2 SO 4  is the preferred acid, although HNO 3 , HCl, H 3 PO 4 , HAc, CrO 3  and H 3 BO 3  may be used. The process may involve a continuous Al substrate which may be solvent cleaned, and then grained with a sand slurry and rotating brush. Two continuous substrates may be passed in parallel through the electrolytic baths, connected to opposite poles of an A.C. supply with their grained surfaces facing each other. A conventional diazo resin coating is finally applied.
Patent GB-1551388-A (GB)
Title: Thizotropic topical fluoride-phosphate gel compositions useful for the prevention of dental caries
IPC: A61K6/00
Filed: 1976-07-08
Abstract: DENTAL THIXOTROPIC FLUORIDE PHOSPHATE COMPOSITION A fluoride-phosphate dental composition, for topical application  to the teeth for the control and prevention of dental caries, which is comprised of active fluoride and phosphate ions in an acid solution with a thixotropic carrier which imparts gel-like properties to the resulting composition.  The thixotropic properties of the carrier enable the composition to be handled like a liquid during filling and dispensing by simple agitation of the mixture whereas, when held stationary, the solution sets up very quickly into a gel-like material which enables it to be applied to and retained by a dental applicator tray when inserted in a patient's mouth.  The fluoride-phosphate composition, besides its thixotropic gel-like characteristics, is heat- and acid-stable, deep-penetrating to the interproximal surfaces of the teeth and, following set up, will not drip, run or thin out in use, even when used in an inverted tray to treat the lower teeth.  In a preferred embodiment the carrier comprises about 10% by weight of the total composition of complex colloidal magnesium aluminum silicate to provide thixotropic properties, and about 1% by weight silica dioxide powder used as an acid-stabilizing and thickening agent, either alone or with additional thickening agents provided, if desired, by carboxymethyl cellulose, hydroxyethyl cellulose or other cellulose gums.  Sweeteners, flavoring and coloring agents are also included to improve the appearance, taste and acceptability of the fluoride "gel" composition.
Patent GB-1480546-A (GB)
Title: Formation of metal oxide coatings on sheet glass surfaces
IPC: H01B13/00
Filed: 1975-07-07
Abstract: 1480546 Spray-producers; coating apparatus SAINT-GOBAIN INDUSTRIES 7 July 1975 [10 July 1974] 28539/75 Headings B2F and B2L [Also in Division C1] Apparatus for spraying a solution onto sheet glass 1 (supported on conveyor 2) comprises a device 4 movable (e.g. on beam 3) across the glass surface in a direction transverse to the direction of motion of the sheet, and provided with valves 13 operable by a member sensitive to the position of the spray device 4 so as to reduce or stop the flow of the solution when the device 4 is adjacent a sheet edge, unsprayed solution being directed to return duct 12. The solution is supplied from openings 10 to tubes 7 in spray guns 6, while air is supplied from 11 to tubes 8, to form sprays from nozzles 9. When device 4 reaches an end of beam 3, levers 14 actuate 3-way valves 13, on contact with stop-plates 15, to divert solution to return duct 12, the supply of solution being restored when the device 4 moves towards the opposite edge. Waste gases (e.g. solvent vapour) may be removed through suction ducts 20.
Patent GB-1093123-A (GB)
Title: Improvements in and relating to systems for the analysis of gases and vapours
Inventor: THORBURN SAMUEL
IPC: G01N9/00
Filed: 1963-07-19
Abstract: 1,093,123. Gas analysis. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 19, 1964 [July 19, 1963], No. 28581/63. Heading GIB. A system for the determination of the molecular weights of constituent gases or vapours in the effluent from a gas chromatographic column comprises a detector sensitive to the density of the constituent gases followed by a detector sensitive to the masses of the respective constituent gases. The chromatograms from the two detectors are recorded and the molecular weights of the constituents are found either by calculation, as described in the Specification, or by feeding the results to a computer. The detector sensitive to density may be a gas density balance detector, and the detection sensitive to mass way be of the kind described in Specification 982, 590.
Patent GB-1004954-A (GB)
Title: Improvements in and relating to cutting devices for metal sheets
IPC: B23D25/04
Filed: 1963-07-19
Abstract: 1,004,954. Shearing. SOC. NOUVELLE SPIDEM. July 19, 1963 [Aug. 3, 1962], No. 28606/63. Heading B3W. A flying shear for corrugated strip comprises a cutter-carrying carriage which is driven by the sheet itself, through means which control the carriage so that it accelerates uniformly from rest to the speed of the strip, the said means comprising two pairs of pivoted links, the central point of each pair of links having a roller which co-operates with a cam. The apparatus comprises a cutter frame 1 adapted to move on guides 2-2<SP>1</SP>, and connected by rods 11-11<SP>1</SP> to an adjustable stop 9. The connection between the rods and the carriage includes two pairs of links 12, 13 and 12<SP>1</SP>, 13<SP>1</SP>, and each linkage carries at its junction a roller 14 which runs in a cam-slot 15, of such a shape that the acceleration of the carriage, when the stop 9 is engaged by the leading end of the strip 23, is uniform. The carriage is returned to its starting position by jacks 16, 16<SP>1</SP>. The moving shear blade 7 is actuated by a pneumatic cylinder 6 which is connected to the blade and the frame by toggle links 3, 4 an 3<SP>1</SP>, 41, so that for a single stroke of the cylinder the cutter makes a complete cycle. The cut is initiated by a contact 24 positioned on the straight part of one of the cams 15. The sheet is supported by rollers 21, 21<SP>1</SP> which are retracted after the cut to allow the sheet to fall. The cut sheets are moved up to a stop 20 by a blade 25 actuated by a jack 18.
Patent GB-1135180-A (GB)
Title: A tumbler wheel for a combination lock
Inventor: PAUL GEORGE DANIEL
IPC: E05B37/08
Filed: 1966-02-24
Abstract: 1,135,180. Combination locks. SARGENT & GREENLEAF Inc. 24 Feb., 1966, No. 28636/68. Divided out of 1,132,256. Heading E2A. A tumbler wheelfor a combination lock comprises an annular hub 71 having a central opening 73 therethrough, adapted to be journalled on a support therefor in the combination lock and including an outwardly facing surface having a plurality of axially extending teeth disposed around the circumference thereof, an outer rim portion 77, surrounding said hub and being coaxial therewith in the locked condition of the wheel, said rim portion having an outwardly opening peripheral recess 78 therein defining a fence receiving gate and comprising a split ring, the end portions of which form a circumferentially movable lap joint and the inner periphery of which is toothed, a rotatable key change member comprising a cam member 82 rotatably supported in the end portions of the ring of said joint for receiving a combination change key and responsive to rotation thereof such that on rotation of the cam member in one direction, the end portions of the ring are relatively moved to constrict the ring and move the toothed surface thereof into interlocking relation with the hub teeth and on rotation of the cam member in the other direction, the ends of the ring are moved in the opposite direction to enlarge the ring and thus release said interlocking relation. In the construction shown, the lap joint between the end portions of the ring is formed by a bifurcated legs formation 80 at one end portion and a complemental tongue formation 81 at the other end portion which interfit; an opening is provided in each leg of the formation 80 and an opening is provided in the tongue 81 offset from the openings in each leg to rotatably receive the cam 82 which has a circular portion 82a located in each leg opening and a circular portion 82b located in the tongue opening, the portion 82b being eccentrically offset from the portion 82a. In a modification, the openings for the cam portions 82a or 82b can be of oval configuration with the longest axis extending radially of the wheel to allow the cam to turn. In a further modification the lap joint can be a simpler form with a single lap tongue on each end portion of the ring 77 in which event the cam 82 has two relatively eccentric disc portions.
Patent GB-282202-A (GB)
Title: Improvements in or relating to roofings for buildings
IPC: E04D12/00
Filed: 1926-11-15
Abstract: 282,202. McNeal, G. Nov. 15, 1926. Roofing tiles.-Roofing consists of lower sheets 6 of asbestos-cement or other material nailed to the rafters and with the lower edges 6a offset to overlap the sheets below, a cement filling 7, and a top covering of waterproof material such as bitumen, or of tiles 9 nailed over the filling and engaging the sheets 6 by flanges 9<a>.
Patent GB-171588-A (GB)
Title: Improved connecting means for hose and other flexible pipes
IPC: F16L33/22
Filed: 1920-10-11
Abstract: 171,588. Heads, E. Oct. 11, 1920. Joints with yielding outer part compressed. - Means for connecting a hose or other flexible pipe e to a metal pipe f comprise a sleeve a having a tapered and screw-threaded bore c and provided with nutfaces b on its periphery, engaging with a pliable packing d so as to form threads thereon by deformation of the outer part. The sleeve may also be formed with projecting stems for use in tightening up. The packing may be wound round the hose, preferably in a tapered manner.