baber/WOPTO huggingface dataset:
Patent GB-1523599-A (GB)
Title: Electric motor control circuits
IPC: H02P7/03
Filed: 1975-10-14
Abstract: 1523599 Control of DC motors STILL GmbH 14 Oct 1975 [17 Oct 1974] 41927/75 Heading H2J A D.C. series motor 20, 21 is controlled by a thyristor 14 passing current pulses from a battery in accordance with the setting of a controller 1 (e.g. a potentiometer or magneticfield-responsive resistor) connected through resistors 2, 3 and an amplifier 5 to a voltage/ frequency converter 9, the direction of rotation being set by contacts 24-27 whose control coils 16, 17 are supplied through a direction change-over switch 13, transistor 12 and resistor 11, the latter controlling a transistor 10 in a circuit including capacitor 4, diode 6 and inverter 7 so that, with switch 13 in one or other position, current through resistor 11 turns on transistor 10 to maintain capacitor 4 charged and allow the signal from controller 1 to pass to converter 9, the transistor 10 turning off when switch 13 opens in the course of changing over, whereby the capacitor 4 discharges through members 6, 7 to cause the signal to converter 9 to be reduced to zero with consequent substantial reduction or cessation of the motor current before opening of whichever contacts 24, 25 or 26, 27 are closed. To ensure closure of the open contacts 24, 25 or 26, 27 before reappearance of the signal to converter 9, the transistor 12 is controlled by the controller signal via a comparator 8 and an AND gate 18, the transistor 12 being initially non- conductive when switch 13 has changed over but being switched on when a predetermined voltage has built up between members 1, 2 (despite the continued discharge of capacitor 4), the consequent flow of current through resistor 11 switching on transistor 10 to cause the controller signalto be reapplied to converter 9, after a delay produced by the charging of capacitor 4. Gate 18 may receive other signals, for example one from a thermal switch responsive to motor temperature, to make the closing of contacts 24, 25 or 26, 27 dependent on other conditions.
Patent GB-1022609-A (GB)
Title: A grounding screen and a method of applying such a screen in a cable sleeve arranged around a cable
IPC: H01R4/64
Filed: 1964-10-14
Abstract: 1,022,609. Screens for cable joints. HOLLANDSCHE DRAADEN KABELFABRIEK N.V. Oct. 14, 1964 [Nov. 20, 1963], No. 41956/64. Heading H2E. In a method of applying an earthing screen 8 to the inner surface of a cable sleeve 4 placed around a cable the sleeve consists of a tubular element of insulating material with a longitudinal slot 7, and a flexible electrically conducting plate 8 is fed through the slot 7 until it covers the inside surface of the sleeve 4. Connections 15, 16 from the cable are then made via cables 10, 11 to the plate 8. The earthing screen 8 consists of a metal plate, e.g. bars with perforations 9 or of a flexible conducting non- metallic material. In the former case one or both sides of the earthing screen are coated with a non-conducting material, e.g. artificial resin, except at the points where soldered connection to cables 10 and 11 are made. The sleeve 4 has slits 3 so that it may be opened up to allow fitting around a cable. Tabs 12 are bent over inwardly after the plates insertion and the sleeve is filled with resin. Sealing rings 5 and 6 of elastic material are provided.
Patent GB-1168651-A (GB)
Title: Improvements in or relating to Magnetic Recording.
IPC: G06F11/14
Filed: 1966-09-20
Abstract: 1,168,651. Magnetic recording. AMPEX CORP. 20 Sept., 1966 [11 Oct., 1965], No. 42016/66. Headings G4C and G5R. In a system of recording and verifying the recording of information, a magnetic member such as tape 12 is moved discontinuously past a recording and reading head 25, a recording item moving between recordings to produce a verifying signal. Due to fringing effects the width of an item, as first recorded, is greater than the magnetic gap width which, in turn is greater than the final data cell length. Data A, from source 27 is applied to the recording head as energization B, and to register 54 and also over circuits 47, 48, 45 to cause drive motor 16 to advance the tape by one cell. Recording takes place when the tape is stationary (or slowly moving) and during the acceleration, and moving to the next recording position, a signal is induced in the reading a playback circuits by the trailing boundary of the recorded item and fed over circuits 50, 51, 53 to comparator 56 to produce an error signal if the inputs from registers 53, 54 are not in agreement. The end of a data cell is determined by light 37 and associated cell 40. Reference has been directed by the Comptroller to Specification 1,099,568.
Patent GB-1208801-A (GB)
Title: Mixed filament textile yarn
Inventor: REESE CECIL EVERETT
IPC: D01D5/08
Filed: 1968-09-04
Abstract: 1,208,801. Mixed filament yarns. E.I. DU PONT DE NEMOURS & CO. 4 Sept., 1968 [5 Sept., 1967], No. 42046/68. Heading D1W. A mixed filament textile yarn of a meltspinnable polymer or polymers comprises a multiplicity of continuous, drawn, synthetic, organic, polymeric filaments of at least two types, each type having a dissimilar inherent apparent colouration and is characterised in that the yarn has a degree of filament intermingling greater than 65%, preferably greater than 80%, the difference in elongation at break of the different filament types does not exceed 15% and the amount of each type of filament is in the range 10-90% of the weight of the yarn. The different types of filaments are preferably blended together prior to or during the drawing stage. The yarn is preferably composed of 50% by weight of each of polyethylene terephthalate and polyethylene terephthalate/5-sodium sulpho isophthalate.
Patent GB-1113771-A (GB)
Title: Improvements in or relating to light weight refractory and heat insulating materials
Inventor: ROBSON WILLIAM ARMSTRONG
IPC: C04B28/06
Filed: 1964-04-25
Abstract: A lightweight heat-insulating refractory material suitable for "hot-tops" and linings comprises mineral wool, pulverized fuel ash, a refractory cement and a further heat-insulating material such as granulated vermiculite or perlite.  Portland cement may also be included. A mix exemplified consists of 50 lb. each of refractory cement, fly ash, mineral wool and water and 1-5 lb. vermiculite and has a dry density of 1-1.5.
Patent GB-896564-A (GB)
Title: An improved shaft bearing surface
Inventor: WHITEHEAD ERIC JAMES
IPC: C23C4/00
Filed: 1959-12-11
Abstract: A method of coating a metallic surface with a metal bearing surface comprises the steps of spraying the second metal on to the first, which may have masked areas, and immersing the sprayed area into a fused salt bath which has been raised to a predetermined temperature. The area is kept in the bath until the metal member, i.e. the base, has reached the temperature of the bath.  This treatment gives a diffusion band, which is suitable for joining a bearing surface to a journal shaft for a thrust reverser.  Specification 698,425 is referred to.
Patent GB-1066024-A (GB)
Title: Production of beryllium hydroxide
Inventor: MORANA SIMON JOSEPH
IPC: C01F3/00
Filed: 1963-10-28
Abstract: Impure beryllium hydroxide is purified by treating it with 10 to 50% excess concentrated sulphuric acid, heating the mixture at above 300 DEG  F., diluting with deionized water to a concentration of 50 g. BeO per litre, filtering off silica, alkaline earth metal fluorides and other insoluble impurities at pH 4, diluting the filtrate containing beryllium sulphate to 10 g. BeO per litre, adjusting to pH 5.3 with ammonium hydroxide, boiling with agitation, filtering to remove remaining impurities, adjusting to pH 5.5 to 7.5 with ammonium hydroxide and filtering off pure beryllium hydroxide.  Preferably an aqueous slurry of impure beryllium hydroxide containing 15 to 35% BeO is added continuously to excess concentrated sulphuric acid over such a period of time that a temperature of above 300 DEG  F. is obtained.
Patent GB-934586-A (GB)
Title: A reaction propulsion system for boats
IPC: B63H11/00
Filed: 1961-11-28
Abstract: 934,586. Hydraulic jet propulsion apparatus. R. PERRIER, and J. COMBARD. Nov. 28, 1961 [Nov. 29, 1960; Nov. 23, 1961], No. 42511/61. Classes 113 and 114. An hydraulic jet propulsion apparatus comprises two pipes 37, 37<SP>1</SP> which are arranged symmetrically with respect to the longitudinal axis of the craft and which project through the transom 48 of a boat to discharge water from a pump 32, driven by a motor 31, above the normal water-level of the craft. Each pipe 37 or 37<SP>1</SP> is provided with a reversing deflector 49 which may be moved vertically in the tubes 46 and 47 by a mechanical linkage extending from a command position (not shown), from a retracted position where the bore 50 aligns with the pipe 37 or 37<SP>1</SP> to a deflecting position, shown in Fig. 11, where the jet is deflected forward by the groove 51. A valve 38 is provided at the junction of the pipes 37, 37<SP>1</SP> which is rotated by a mechanical linkage (not shown) from the command position so as to vary the output from each pipe 37 or 37<SP>1</SP> so that the craft may be steeerd. The reversing deflector may be disposed at the junction of the pipes 37, or 37<SP>1</SP> and a valve may be provided adjacent the outlet of each pipe. The Specification describes a resilient, e.g. rubber, mounting for the pump and motor.
Patent GB-1061669-A (GB)
Title: Improvements in and relating to means for securing a digging tooth to the earth working mng member of an earth working machine
IPC: E02F9/28
Filed: 1965-10-08
Abstract: 1,061,669. Earth-digging teeth. POCLAIN. Oct. 8, 1965 [Oct. 9, 1964; April 1, 1965], No. 42857/65. Heading E1F. A digger tooth is secured to the leading edge of the earth-working member of an earth-working machine on the tightening up of a bolt extending between and in engagement with a locking bar and a tooth support on said edge, the tightening up of the bolt causing the bar, which bears against the support and a part of the tooth housed in the support, to so move as to cause wedging of the tooth in the support. Two preferred constructions are described.
Patent GB-1401029-A (GB)
Title: Logic circuits
IPC: H03K19/096
Filed: 1972-09-15
Abstract: 1401029 Logic circuits HONEYWELL INFORMATION SYSTEMS Inc 15 Sept 1972 [30 Dec 1971] 42994/72 Heading H3T A circuit comprises first and second logic circuits each including a series connection of a diode connected transistor Q 2 ; Q 5 , a transfer gate transistor Q 3 ; Q 6  and a storage capacitor C 2 ; C 3 , connected between a common precharging bus and ground, the transfer gates Q 3 , Q 6  being switched by clock pulses CL 1 , CL 2  differing in phase, logic networks 10, 30 respectively associated with the storage capacitors 3 2 , C 3  for discharging them, a connection between the storage capacitor C 2  and network 30 and an output circuit Q 8 -Q 14  connected to the capacitor C 3 . In operation, the precharge clock pulse P charges C 2  via diode Q 2  and gate Q 3  which is turned on by the clock CL 1 . If the input to the inverter 10 is a "I", then at the end of the P pulse C 2  discharges via Q 3  which remains on and inverter 10. During the next P pulse synchronized with the CL 2  pulse capacitor C 3  is charged via diode Q 5  and gate Q 6 . However since network 30 is a NAND gate and as one input from C 2  is at "0" level, C 3  is not discharged at the end of the P pulse. The output circuit is a push-pull driver including a capacitor C 4  charged periodically by the CL 2  clock at the end of which C 4  is discharged or undischarged depending on the presence or absence of charge on C 3 . The logical networks 10, 30 may be formed by circuits having different logical functions.
Patent GB-1526256-A (GB)
Title: Indicators for echo sounding systems
IPC: G01R13/20
Filed: 1975-10-20
Abstract: 1526256 CRT displays ELECTROACUSTIC GmbH 20 Oct 1975 [8 Nov 1974] 43036/75 Heading H4T [Also in Division G1] In an echo-sounding system, echo signals are displayed on a cathode ray tube as horizontal deflections from a vertical time axis by horizontally deflecting the electron beam, darkened, by a cyclically varying current and brightening the electron beam when and for as long as a voltage proportional to the instantaneous value of the deflection current does not exceed a voltage derived from the echo signal. To mark both sides of the time axis, two comparators 1, 2 compare the echo signal, erect 3 and inverted 5, with the deflection signal.
Patent GB-1275359-A (GB)
Title: Mesa-type semiconductor device
Inventor: ADKINSON ALLEN RALPH
IPC: H01L27/082
Filed: 1970-09-10
Abstract: 1275359 Semi-conductor devices GENERAL MOTORS CORP 10 Sept 1970 [15 Sept 1969] 43404/70 Heading H1K A mesa-type semi-conductor device, for example a Darlington amplifier comprises a wafer 10 of N-type silicon, forming a common collector region, a two section P-type region forming an input base 26 and an output base 24, N-type regions forming an input emitter 20 and an output emitter 18, a spiral-like etched moat 22 with parallel segments 28, 30 surrounding the output emitter 18, the parallel segments defining therebetween an elongated passageway 32 of base region material forming an integral resistive connection between the base regions, a second moat 40 extending into the output base region so as to form a resistive strip 42 of the base region, and a first connection 58, e.g. of aluminium, between the input emitter contact 57 and the output base, the connection lying on a silicon oxide layer over the resistive connection 32, a second connection 50 lying between the output emitter contact 49 and the free end of the resistive strip 42. The resistive passageway 32 provides the resistance 32<SP>1</SP> and connections 88 and 86 of Fig. 4, resistive strip 42 providing the other resistance 42<SP>1</SP> of the circuit diagram. In another embodiment, the input and output transistors occupy opposite halves of a rectangular wafer, the moat taking the form of two spaced parallel moats extending from opposite sides across the majority of the wafer. In a third embodiment the emitter regions have digital projections, and a peripheral moat is also used.
Patent GB-1321449-A (GB)
Title: Display device carrying two inscriptions
IPC: G09F/
Filed: 1970-09-10
Abstract: 1321449 Display devices P BERNARD 10 Sept 1970 [11 Sept 1969] 43448/70 Heading G5C A display device carrying two separate inscriptions comprises a base-plate 1 adapted to be connected to a support and having on a front surface at least part of a first inscription 2, 3 the remaining parts 3a, 2a being on two flaps 4, 5 pivotally mounted on the base-plate so that in a first position of the flaps (Fig. 1), the first inscription (90) is displayed and in a second position (Fig. 3) the flaps are superposed over the front surface and display a second inscription (F) on the rear surfaces of the flaps. Preferably, central part la is of extra thickness, as are ends 7, 8 (Fig. 2) and flap 5 has a recess 5c to accommodate the overlapping portion of flap 4 in the second position, so that the inscriptions present flat surfaces in both positions. The flaps may be maintained in either position by fixing means, e.g. press-studs, hooks, pins, self-adhesive means or magnets. The plate may be used for information plates on vehicles or for advertising purposes, notices, and signals, and may be made in one piece of plastics material or the flaps may be hinged separately.
Patent GB-1147271-A (GB)
Title: Electric furnace having replaceable liner tube sections
IPC: F27B9/08
Filed: 1967-09-25
Abstract: 1,147,271. Continuous electric furnaces; muffles. CARBORUNDUM CO. 25 Sept., 1967 [29 Sept., 1966], No. 43500/67. Heading F4B. [Also in Division H5] A continuous electric furnace comprises a casing 60 surrounding refractory bricks 62 supporting a trough-like graphite slab 78 receiving an elongated graphite liner tube 24 formed in sections 26 propelled through the furnace by a pusher unit 10. By this means the liner tube is continuously replaced without shutting down the furnace. The pusher unit comprises an endless chain 32 trained about sprockets 34, 36, 38 and 40, rollers 48 on the chain being engaged by forks 50 dependent from a platform 52 carrying a liner tube pusher block 54. Sprocket 34 is driven by a motor 44 through reduction gearing 46. The furnace preheating section shown is heated by rod resistor elements 98 disposed transversely of the casing. A succeeding firing section is heated by axially disposed three phase graphite resistance elements, enclosing and slightly spaced from the liner tube. Proceeding in line is a controlled cooling section incorporating some heating elements 98, a water-jacketed cooling section and a waterjacketed discharge chamber. The furnace is applied to the production of silicon carbide articles, by loading the products and silicon metal into boats and pushing them through the furnace which is first purged with N 2 . The inner temperature is kept at 1800-2500‹ C.
Patent GB-943684-A (GB)
Title: Process for the manufacture of polyoxymethylenes
IPC: C08G2/06
Filed: 1959-12-23
Abstract: A polyoxymethylene of high molecular weight is prepared by polymerizing trioxane by bulk polymerization in the absence of an inert solvent and in the presence of a cationic catalyst. Specified catalysts are borontrifluoride, stannic chloride, antimony pentachloride, methyl aluminium dichloride, methyl tin trichloride, an organo-aluminium or organo-tin compound in combination with an alpha-halogenated ether, saline compounds of halides of boron, iron, tin and antimony (but not antimony fluoride) where an aryldiazonium-fluoroborate is the preferred saline compound, an aryldiazonium salts.  The catalyst may be diluted with an inert medium.
Patent GB-940700-A (GB)
Title: Supported metallic catalysts
Inventor: WOLF FRIEDRICH
IPC: B01J37/00
Filed: 1961-12-07
Abstract: In a process for the production of metallic catalysts from silicates and alumino-silicates possessing ion exchange properties, the latter are treated with a gas containing the vapours of one or more volatile compounds of a metal having an atomic weight above 47, the resulting product being washed and subsequently reduced.  The silicate used may be a  Na2 Si2 O5, Ba Si2 O5, Ca2 SiO4, Na2 SiO3 or a synthetic zeolite molecular sieve. Volatile compounds of metals having an atomic weight above 47 mentioned are ferric chloride, bismuth chloride, cupric chloride, titanium tetrachloride, tin tetrachloride, selenium chloride, chromyl chloride, zirconium iodide, thorium iodide and uranium iodide.  Reduction may be effected conventionally e.g. by use of formaldehyde, hydrogen, hydrazinc or hydroxylamine.  Examples are given.
Patent GB-439635-A (GB)
Abstract: 439,635. Calculating-machines. NATIONAL CASH REGISTER CO., Dayton, Ohio, U.S.A. June 11, 1934, No. 17231. Convention date, June 10, 1933. Addition to 420,807. [Class 106 (i)] In the parent Specification a calculating- machine is described which, in three consecutive cycles of operation, converts an overdraft amount standing on a balance totalizer from complementary to positive form, prints the amount and clears the totalizer. According to the present invention, during these operations, the amount is also transmitted for storage to a second totalizer so that it can, if desired, be retransmitted to the balance totalizer at the next operation. The overdraft-printing operation thus causes the recording of what is in effect a sub-total. An arm 25 is rocked anticlockwise at the beginning of the overdraft-taking operation and, through a pin 26 on the arm and a slot 27, moves anticlockwise an arm 29, which pulls to the right a slide 31 setting the type of a symbolprinting device. A pin 36 on the slide turns a lever 38 to move to the left a slide 42 pivotally carrying at 43 a lever 44, 45, the tail 49 of which is brought beneath a pin 50. The pin 50 is moved downwards by a crank 53 actuated by the printer shaft during the third overdraft cycle. The lever 44, 45 thus rocks anticlockwise to raise a pin 56 and link 57, the link setting the second totalizer for addition in known manner so that the overdraft amount is entered into this totalizer. This entering mechanism can be disabled by moving a slide 93 to block the end 45 of the lever 44, 45, the two parts 44, 45 of this lever being connected by a pivot and a spring so that the pin 50 can move the tail 49 while the part 45 is blocked by the slide 93. The slide 93 has a window which, when the lever 45 is blocked reveals a symbol " N " and when the lever is not blocked shows a symbol " Z."
Patent GB-1528759-A (GB)
Title: Separator for solid-liquid mixtures
IPC: B01D21/00
Filed: 1975-10-29
Abstract: 1528759 Settling apparatus SIGMA CORP 29 Oct 1975 44567/75 Heading BID A settling apparatus comprises a plurality of separator modules (only one shown) arranged in parallel, each module comprising superimposed settling chambers 42, 42 A to G each having two stacks of parallel inclined plates or trays. In use liquid enters through inlet 38 and flows through passage to the bottom chamber 42. In chamber 42 the liquid flows between the trays downwardly and inwardly to central zone 48. The liquid then passes through passages 50, 53, 55 into chamber 42A and passes successively through chambers 42 A to G as in chamber 42. Solids settling in chambers 42 A to G pass through openings in the bottom walls thereof to bottom chamber 42 for discharge through outlet 18. In one embodiment solids discharging from outlets 18 of the modules pass through a further settling zone comprising inclined plates to distributor means having a pivotable flap for directing the solids into one or other of two compaction means. Compaction means 22 may comprise a cylinder 88 in which is slidably mounted a piston 90. The piston 90 is provided with cover 102 having openings 103, and screen 104. Liquid collecting in cover 102 may be sucked out through tube 108. Solids adhering to screen 104 may be removed by blowing air through the tube 108. The cylinder 88 is provided with door 106 for discharge of solids.
Patent GB-1438027-A (GB)
Title: Assembly for transmitting rotary motion
IPC: B63C11/34
Filed: 1973-09-24
Abstract: 1438027 Bearings; conveying rotary motion FRANCE ARMED FORCES MINISTER OF 24 Sept 1973 [25 Sept 1972] 44753/73 Headings F2A and F2K An assembly for transmitting rotary motion comprises a shaft 2 rotatably mounted in a smooth walled hole 1c in a wall 1, and a thrust roller bearing 12 which surrounds the shaft 2 and is mounted in a hollow boss 9 secured to one side of the wall 1, the shaft 2 comprising at least two non-integral portions 2a, 2b, 2c, one of which, 2c, extends beyond the wall and has a shoulder 22c which co-operates with the bearing 12 to transfer axial load from the shaft portion 2c to the wall 1 via the bearing 12. The embodiment shows a third shaft portion 2b, Fig. 2, in the form of a keyed disc which connects the other shaft portions 2a, 2c. The assembly may be used to provide a mechanical connection through the wall of a submarine.