baber/WOPTO huggingface dataset:
Patent GB-520284-A (GB)
Title: Improvements in electromagnetic relays for use on railway signalling and the like
IPC: H01H50/32
Filed: 1938-10-14
Abstract: 520,284. Electromagnetic switches. DELL, R., EVERY, W. S., and LONDON PASSENGER TRANSPORT BOARD. Oct. 14, 1938, No 29778. [Class 38 (v)] An electromagnetic relay particularly applicable for railway signalling has two independently movable armatures operated by common windings; both armatures must be operated in order to close a signal or other circuit and interlocking mechanism , is also provided so arranged that failure of an armature to return to its normal position when the windings are de-energized, locks the other armature in its normal de-energized position. There may be two sets of contacts in series, each set operated by one armature, or there may be one set only which is operated by the combined action of the two armatures. The first of these arrangements is shown in the Figure wherein an induction relay.has two vanes 1, 2 adapted, when the operating coils are energized, to raise rods 19, 21 and thereby tilt rockers 16, 17 carrying movable contacts 24, 28. The interlocking mechanism consists of members 41, 42 fixed to the spindles 3, 4 carrying the vanes 1, 2 and co-operating, with latching members 43, 44 on, levers 33, 32 carrying rollers 40, 39 which bear on the vanes 2, 1 respectively. In a modification, Figs. 7, 8 (not shown) the two rods 19, 21 act on either end of a rocking lever connected at its middle point to a single rocking contact member.
Patent GB-696965-A (GB)
Title: Improvements in or relating to plaster, putty or the like compositions for building purposes
IPC: C04B41/48
Filed: 1950-12-06
Abstract: A putty composition comprises a water-soluble cellulose derivative, e.g. methyl or ethyl cellulose or a salt of cellulose glycollic acid, an inorganic filler graded between 0.0005 and 0.8 mms. and sufficient water to render plastic.  Preferred quantity of the cellulose derivative is 2 per cent of the dry solids of the composition, which may also include fibrous materials, emulsions, pigments and hydraulic binders.  Sand, pumice, whiting, chalk, kieselguhr, dolomite, felspar, gypsum, cement, asbestos, peat, cellulose fibres, hair and glass fibres are specified ingredients. Synthetic resins, e.g. polyvinyl acetate, or natural binders, e.g. bitumen, may also be present.ALSO:A putty composition comprises a water soluble cellulose derivative, inorganic fillers graded between 0.0005 and 0.8 mms. and water to render plastic.  Hydraulic binders e.g. cement and gypsum, pigments, and fibrous material, e.g. asbestos, peat, cellulose, board fibre, staple fibre, cowhair, glasswool and stonewool may also be present.  Vegetables fibres may be pretreated with calcium chloride solution when cement is present. Specified cellulose derivatives are methyl and ethyl cellulose and salts of cellulose glycollic acid. Inorganic fillers specified are chalk, sand, kieselguhr, felspar, dolomite, whiting and pumice.  2 per cent. of the dry solids of the composition comprises the cellulose derivative.  In addition, emulsions of synthetic resins e.g. polyvinylacetate or natural binders e.g. bitumen may be present.
Patent GB-1060209-A (GB)
Title: Improved press plates
IPC: D06F71/36
Filed: 1965-07-14
Abstract: 1,060,209. Electrically-heated press plates. O. FAHR. July 14, 1965 [July 29, 1964], No. 29904/65. Heading H5H. A heating unit in a press plate comprises a flat tube containing at least two, preferably three, heating coils arranged side-by-side and embedded in insulating material. Each coil may have a greater number of turns per unit length near its ends than at its centre. The heating units may be arranged in recesses in the press plate and may be grouped closer together at the edges of the plate than at the centre, Figs. 2 and 3 (not shown). Also, the heating units near the edges of the press plate may be disposed at an angle to the plate surface rather than parallel thereto as are the central units, Fig. 7 (not shown). Two or more heating units may be arranged in a common recess in the press plate with spacers therebetween, Figs. 4-6 (not shown).
Patent GB-1240430-A (GB)
Title: Improvements in or relating to microwave tubes
IPC: H01J23/36
Filed: 1970-06-22
Abstract: 1,240.430. Waveguide windows; travelling- wave tubes. SIEMENS A.G. 22 June, 1970 [23 June, 1969], No. 30114/70. Headings H1D and H1W. Rupture or leaking at a waveguide window due to unequal thermal expansion of the window material and the material of the travelling- wave tube input or output waveguide in which it is mounted, is avoided by surrounding the waveguide at the location of the window by a close fitting metal reinforcement of a metal whose coefficient of thermal expansion is smaller than that of the waveguide material. As shown, externally grooved waveguide sections 4 and 5 are slid over the sapphire or beryllium oxide window 1 to leave a narrow gap 6 which is filled with solder. Sheet solder is then placed over the joint, together with two separate molybdenum reinforcing members 7 and 8, each of which has a slot 9 which is wider than, and is placed over, the solderfilled gap 6. The assembly is then mounted in a clamp and heated to melt the solder, to secure the ceramic window and the molybdenum members to the inside and outside of the waveguide sections, respectively. The peripheral face 3 and ground edges 2 of the window are metallized to facilitate this operation.
Patent GB-915909-A (GB)
Title: Production of n-brominated organic compounds
IPC: C07D233/72
Filed: 1960-09-01
Abstract: N-Brominated organic compounds are prepared by adding hypochlorite ions to an acid solution of succinimide, glutarimide, hydantoin or a 5,5-di-lower alkyl hydantoin ("lower" meaning containing 1-4 carbon atoms) and bromine, the pH being maintained between 1.0 and 4.0 during at least the greater part of the reaction period.  The hypochlorite ions may be provided by means of chlorine or an alkali hypochlorite.  Examples prepare:- (1)-(5) N-bromosuccinimide, (6), (7) N-bromoglutarimide, (8), (9) 1,3-dibromohydantoin, (10), (11) monobromo-5,5-dimethylhydantoin, (12)-(16) 1,3-dibromo-5,5-dimethylhydantoin, (17), (18) monobromo-5-ethyl-5-methylhydantoin, (19), (20) 1,3-dibromo-5-ethyl-5-methylhydantoin, (21) monobromo-5-isobutyl-5-methylhydantoin, and (22), (23) 1,3-dibromo-5-isobutyl-5-methylhydantoin.
Patent GB-1189274-A (GB)
Title: Static Time-Lag Relays
Inventor: AVIANDER STIG
IPC: H01H47/18
Filed: 1968-06-25
Abstract: 1,189,274. Transistor time delayed switches. ALLMANNA SVENSKA ELEKTRISKA A.B. 2 June, 1968 [27 June, 1967], No. 30257/68. Heading H3T. A time delay circuit comprisesabridge having timing arms C, R and potentiometer arms P, a transistor controlling a relay L and having its emitter base path connected across the diagonal 6, 3 and a resistor R1 chosen such that the voltage drop across R1 when the transistor starts to conduct is equal to the voltage drop across the diagonal containing the emitter-base path. The resistor R1 allows the minimum time delay to be reduced below a value corresponding to the time to charge the capacitor to a value equal to the emitter-base threshold. As shown, the current producing the voltage across R1 is the charging current and this is supplemented at switching by positive feedback current from T2. When the circuit is switched off, the relay coil L is discharged through R1 and D and this provides feedback to speed the switching off. In Fig. 2 a diode D3 protects T1 against excessive reverse voltage and the voltage drop across R1 also compensates for the diode voltage drop. The relay is controlled by a thyristor Ty which provides feedback through D1 and C to the base of T1 to speed switching. In addition, the thyristor, when conducting, reduces the voltage at the upper terminal of potentiometer P to a value equal to the voltage across D4 so that there is no voltage across P and resetting is independent of the position of the slider. Diodes D4 also provide temperature compensation.
Patent GB-833554-A (GB)
Title: Improvements in or relating to warp beaming machines
IPC: D02H5/02
Filed: 1957-09-26
Abstract: 833,554. Removing dust generated in industrial processes. CARRIER ENGINEERING CO. Ltd., and BLOOMER, I. Sept. 25, 1958 [Sept. 26, 1957], No. 30263/57. Class 8(2). Dust is blown from yarns 7 as they approach the comb 8 of a warp beaming machine by jets of compressed air issuing upwardly from a line of apertures 11, Fig. 2 (not shown), in a tube 10 located beneath the yarns and at that side of the comb remote from the beam 1. The compressed air is supplied by a fan 13 and the resulting dustladen air is drawn into a hood 16 and through a duct 17 and filter screen by a fan 20 which discharges clean air through a duct 22. A transparent panel 24 is pivoted to the lower edge 23 of the hood 16. A guard bail 29 is carried by arms 30 pivoted at 31.
Patent GB-734255-A (GB)
Title: Methods of making semiconductor bodies and devices utilizing them
IPC: H01L31/18
Filed: 1953-11-03
Abstract: 734,255. Semi-conductor devices. WESTERN ELECTRIC CO., Inc. Nov. 3, 1953 [Nov. 14, 1952], No. 30332/53. Class 37. Methods of making semi-conductor bodies comprise heating bodies of P-type Ge or Si in the presence of lithium which is a donor impurity to cause diffusion thereof into part or the whole of the body. A body of Ge made P- type by Ga impurity is ground on plate glass with Al2O3 in water, a foil of lithium applied to one surface and the body heated in a He atmosphere for 60 seconds at 680 C. and quenched. Excess lithium is removed by immersion in water, the surface etched with a mixture of equal parts of nitric and hydrofluoric acids and water, and antimony and indium doped gold wires are fused to the N- and P-type regions respectively. The body may be diced before etching to form smaller units. In another example using P-type Si the grinding is done by silicon carbide in water and heating is for 120 seconds at 900 C. before quenching on a cold steel plate. Limited extent PN junctions are made by using a blob of lithium instead of a foil. A PNP junction body (Fig. 3) is made by heating at 600 C. a wire containing lithium and an acceptor impurity with a much smaller diffusion constant in Ge or Si than lithium (e.g. alloy of Li 5 per cent, In 95 per cent) in contact with a P-type body to produce a P-type region 17 immediately adjacent the wire and an N- type region 12B beyond it. Collector and base connections are made at 16 and 18 respectively and a point contact emitter 19 placed adjacent the PN junction 15A. Another method of making a PN junction comprises heating P-type Si or Ge in contact with Li until the latter diffuses to make the whole body N-type, and then applying current pulses through an inert metal electrode, e.g. tungsten, to the body, when Li diffuses into the wire to leave a P-type region adjacent the wire. In all cases the Li foil is replaceable by Li vapour, an evaporated layer of Li or by a layer formed by dipping in molten Li, and an argon atmosphere may replace helium. The method of controlling the depth of the PN junction by time and temperature of diffusion is discussed in detail. Specification 700,231 is referred to.
Patent GB-1399742-A (GB)
Title: Pumps
IPC: F04B43/00
Filed: 1972-06-28
Abstract: 1399742 Reciprocating pumps C HUGHES 27 Sept 1973 [28 June 1972] 30333/72 Heading F1A A double-acting pump comprises at least two diaphragms 12, 14 engageable with seats 16, 18 and reciprocated in opposite directions by an eccentric or crank drive via rods 26, 28, inlet and outlet ports 8, 10 and pump chambers 20, 22, 24 being arranged in a substantially straight line. One of check valves 62, 64 may be omitted. The drive comprises eccentrics 50 acting via crossheads 58 guided in bushes 60. The two-part housing 2, 4 is removably held together by bolts 6 to facilitate access to the diaphragms. A plurality of pumps may be connected in series with their flow paths in line by replacing inlet and outlet fittings 70, 72 by connecting adaptors. Three diaphragms may be provided, the intermediate diaphragm reciprocating in opposition to the first and last.
Patent GB-961944-A (GB)
Title: Improvements in or relating to building construction and building units therefor
IPC: E04B2/02
Filed: 1960-09-02
Abstract: 961,944. Building units; walls. I. ERDELY, and M. ERDELY. Sept. 2, 1960, No. 30382/60. Headings E1B and E1V. Permanent formwork for a wall is built from units 1 and from apertured blocks, Fig. 2, both having grooves 2 in their side faces for jointing with rabbets 3 in their ends. The block may be severed into units 1 and the various multiples of this unit. The assembled formwork may be filled with various aggregates and binders.
Patent GB-1506164-A (GB)
Title: Ultrasonic bonding apparatus
IPC: H01L21/607
Filed: 1974-07-09
Abstract: 1506164 Testing ultrasonic bonding operations MULLARD Ltd 20 May 1975 [9 July 1974]  30383/74 Heading G1G [Also in Division B3] An instrument for use with an ultrasonic bonding apparatus to estimate the bond strength operates on the principle that the strength is related to the change in vibration amplitude of the bonding tool as between when the tool vibrates freely and when the vibrations are modified by loading of the tool during bonding. A large change is indicative of a good bond. In the Fig. 3 embodiment a bonding tool (see Division B3) is vibrated by a pulsed magnetostrictive transducer 2 and the vibrations are sensed by a Piezo-electric transducer 8 fixed to 2. Signals from 8 are monitored at 16, amplified at Al and rectified at D. At the start of a transducer pulse, threshold circuit T triggers a delay circuit 24 which in turn operates sample and hold circuit 23 to sample the vibration amplitude at a selectable instant within the pulse. The gain of amplifier A2 is adjusted so that, with the tool vibrating freely (prior to bonding) the output voltage of A2 matches a reference voltage 25. During a subsequent pulse, when bonding is in progress, the sampled amplitude gives a difference signal output from amplifier A3. This signal is monitored at 26 and if it is less than a limit value set at 28 audible and lamp alarms 30, 31 are actuated by way of comparator A4 and relay 29. The procedure for setting up the limit value at 28 is described.
Patent GB-966330-A (GB)
Title: Egg orientating mechanism
Inventor: GIBBS PETER FREDERICK
IPC: B65B23/06
Filed: 1961-08-23
Abstract: 966,330. Orientating eggs. BRECKNELL, DOLMAN & ROGERS Ltd. April 12, 1962 [Aug. 23, 1961], No. 30393/61. Heading B8A. Eggs 15 incorrectly orientated between pairs of parallel rollers 14, on which they are supported, the rollers 14 forming an endless conveyer 1, drift to the " wrong " side of the conveyer, all the rollers being rotated in the same sense, and are elevated clear of the rollers to be turned over endwise. Sprockets 20 on spindles 11 carrying the rollers 14 engage a fixed rack 21 over sections B, C, D so as to rotate the rollers 14, thus causing eggs 15 randomly placed on the rollers in a section A to follow their small ends to the sides of the conveyer where the correctly orientated eggs are retained by flanges 18 and the incorrectly orientated eggs retained by collars 19. In section C of the conveyer each pair of adjacent yoke cross-bars 12B rises simultaneously under the action of a cam 23 and a pin-and-slot mechanism 16 to lift each egg clear of the rotating action of the rollers 14 so that the forward motion of an incorrectly orientated egg against a fixed rail 22 reverses the direction of the egg. Correctly orientated eggs pass clear of the rail 22.
Patent GB-998092-A (GB)
Title: Improvements in reflex reflectors
IPC: G02B5/128
Filed: 1961-08-23
Abstract: 998,092. Reflex reflectors. MINNESOTA MINING & MANUFACTURING CO. Aug. 23,1961 [Aug. 29, 1960; March 1, 1961], No. 30413/61. Heading G2J. A reflex reflecting device comprises a beaded reflex reflecting sheet 15 spaced from and underlying a layer 11 which comprises several cube corner retro-reflectors 13 arranged with the apieces of the reflectors directed towards the beaded sheet, the retro-reflectors 13 and sheet 15 being enclosed within a hermetically sealed chamber e.g. by sealing the edges 16,17 of members 11, 15 together. The plate 11 having the cube corner prisms 13 may be as described in U.S.A. Specification 2,022,639 and the beaded reflex reflector 15 may be as described in Specification 556,935.
Patent GB-646993-A (GB)
Title: Improvements in or relating to screw thread mechanism
IPC: B62D3/08
Filed: 1947-11-18
Abstract: 646,993. Screw and nut gearing; conveying rotary motion. THOMPSON PRODUCTS, Inc. Nov. 18, 1947, No. 30561. Convention date, May 5. [Classes 80(i) and 80(iii)]  In a screw and nut mechanism employing intermediate balls between helical grooves of the screw and nut a secondary nut is provided which is adjustable eccentrically of the main nut to provide a lateral preloading on the balls to take up backlash. As shown applied to a vehicle steering  mechanism a steering shaft 10 transmits longitudinal motion to a nut member 20 through balls 14. This motion is resolved into a variable amount of rotary motion by means of an anchor link 24 coupled to a projecting arm 22 of the nut in a manner as described in Specification 619,147, which motion is transmitted to a steering droparm shaft 30 through projecting rollers 48 on the shaft engaging in grooves 20f in an extension 20e of the nut. A secondary nut 40 is provided adjacent the nut 20 having an extension 40b with a slightly eccentric surface engaging a corresponding surface on the nut member 20. Thus, relative rotation of the nuts 40 and 20 imposes a lateral loading on the two sets of balls to take up any play, the two nuts then being secured together by a clamp 44. An axial preloading may also be obtained by the use of shims 46 between the extension 40b of nut 40 and nut 20. The rollers 48 are also made conical and adjustable radially of shaft 30 to eliminate play in the grooves 20f. These grooves 20f may be curved to vary further the relative rotation between shafts 10 and 30.
Patent GB-505558-A (GB)
Title: Improvements in and relating to power transmission systems
IPC: H02K51/00
Filed: 1937-11-08
Abstract: 505,558. Transmitting mechanical power. BRITISH THOMSON-HOUSTON CO., Ltd., and JEWITT, D. E. Nov. 8, 1937, No. 30612. [Class 38 (iv)] A transmission system suitable for transmitting power from a prime mover to a driven transmission shaft 13 such as a ship's propeller shaft comprises a shaft 14 coupled to a prime mover, an inner rotor member 1 secured to the shaft 14 and having on it an excitation winding 5, an outer rotor member 3 secured to the driven transmission shaft 13 concentrically with it and free to rotate coaxially with respect to it and having on it an excitation winding 6, and an intermediate freely rotatable coaxial member 9 carrying armatures 2 and 4 having windings 8 and 7 co-operating with the rotor windings 5 and 6 respectively ; means including slip-rings 16 and reversing switch 20 are also provided for connecting the phases of the armature windings 7 and 8 and braking means 10 for normally holding stationary the intermediate member 9.
Patent GB-1223190-A (GB)
Title: Improvements in or relating to fluid pressure motor devices
Inventor: CHOUINGS LESLIE CYRIL
IPC: F16D65/18
Filed: 1968-06-27
Abstract: 1,223,190. Brakes. AUTOMOTIVE PRODUCTS CO. Ltd. 18 June, 1969 [27 June, 1968], No. 30674/68. Headings F2E and F2F. A brake-pad applying piston 11 is enabled to move forward to take-up wear but at the same time retract by a suitable amount after each application, by means of a spring 15 secured at 14 to the piston and having ends 21 which press against the cylinder wall to give frictional grip which is overcome when the piston advances to take-up wear but which then withdraws the piston to a new retracted position.
Patent GB-1081434-A (GB)
Title: Method and apparatus for heat treating low carbon steel
IPC: C21D9/08
Filed: 1964-08-04
Abstract: <PICT:1081434/C6-C7/1> A steel workpiece containing up to 0.25% of carbon and up to 1% of manganese is heated to a temperature above 1500 DEG  F. and is then quenched to reduce the temperature from 1500 DEG  F. to below 700 DEG  F. in less than 0.5 second so forming a uniform martensitic structure, the quenching being effected by subjecting the surfaces of the workpiece to pressurized continuous streams of coolant.  In a particular form of apparatus for quenching tubes as shown in Fig. 1, tube 7 is removed from furnace 8 on rollers 32 and passed over a boom 16 on the end of which is mounted an internal quench head 10, while the exterior is simultaneously quenched by ring 2. The head and the ring are provided with numerous openings from which the coolant supplied at high pressure by pump 23 is discharged on to the workpiece in the form of continuous rod-like streams.  The apparatus is provided with a second boom 17 with quenching head 11, the two booms being movable transversely so that they may be used alternately, while the ring 2 is movable axially to facilitate discharge of the quenched tubes.
Patent GB-1396458-A (GB)
Title: Explosive compositions
IPC: C06B47/14
Filed: 1973-06-28
Abstract: 1396458 Explosive compositions ICI AUSTRALIA Ltd 28 June 1973 [12 July 1972] 30755/73 Heading C1D A slurry explosive includes an oxygen-releasing salt, water, a fuel, and a detonation sensitizing material comprising aluminium or aluminium alloy powder combined at its surface with from 0À01 to 0À2% by weight of a naturallyoccurring resin acid, or a derivative thereof. The sensitizing material is hydrophobic and retains its effectiveness after storage and exposure to water. In examples, finely divided or coarse atomized aluminium powder is reacted with an aqueous solution of sodium abietate or with a sodium hydroxide solution of hydrogenated rosin and added to compositions containing ammonium nitrate, sodium nitrate, water, coarse A1 powder, sugar, gilsonite, sulphur, guar gum, and thiourea. Other ingredients referred to are inorganic chlorates and perchlorates, TNT, RDX, HMX, tetryl, PETN, nitrocellulose, nitrostarch, urea, alcohols, glycols, glues, silicon, ferrosilicon, ferrophosphorus, titanium, boron, charcoal, asphalt, sawdust, flours, dextrins, starches, zinc chromate, ethyl hexanol, biopolymeric thickening agent, and dispersed air or gas. A list is given of other suitable resin acids, in addition to abietic acid. Specification 1,386,203 is referred to.
Patent GB-520534-A (GB)
Title: Improvements in or relating to planting machines
IPC: A01C11/02
Filed: 1938-10-25
Abstract: 520,534. Planting-machines. TRANSPLANTERS (HOLDING CO.), Ltd., and POMIERANIEC, I. Oct. 25, 1938, No. 30757. [Class 6 (i)] A planting-machine is provided with a number of grippers which travel through feeding positions in a direction at right angles to the direction of travel of the machine and through the plant setting position in a direction parallel to the direction of travel of the machine. As shown in Figs. 1 and 2, plant grippers 6 are attached to an endless band 1 which moves in a horizontal plane round a roller 2 and in a vertical plane round rollers 3, 4. The plants are fed to the grippers at positions situated between the rollers 2. 3 and are planted as the band passes round the lowest point of the roller 4. In order to enable the band to bend as it passes round the rollers it may be formed of links 5 as shown in Fig. 3. Each pair of links is provided with members 8, 9 pivoted to the links at 11 and hinged together at 12. A plough 7 may be provided to open a furrow to receive the plants. The grippers may be opened and closed in the manner described in Specification 520,535.