baber/WOPTO huggingface dataset:
Patent GB-544249-A (GB)
Title: Improvements in or relating to apparatus for detecting detonation in internal combustion engines
IPC: F02P17/00
Filed: 1940-05-10
Abstract: 544,249. Engine detonation indicators. SPERRY GYROSCOPE CO., Inc. May 10, 1940, No. 8499. Convention date, June 1, 1939. [Class 40 (i)] [Also in Group XL] An arrangement using a pick-up responding to cylinder vibration for indicating detonation in an internal combustion engine is prevented from responding to other vibrations by making it ineffective except during that portion of the cycle during which detonation may occur. As described, the bias on a thermionic valve is controlled by pulses derived from the ignition circuit. The indicating circuit A comprises, as described in Specification 533,499, a backbiassed valve 4 and a neon lamp 3 which indicates when the bias on 4 is overcome by a voltage in a pick-up 2 derived from vibrations due to detonation. According to the invention, the ignition lead 7 includes a condenser, 8, Fig. 2, which transmits, a pulse over condenser 16 to the grid of valve 15 normally biassed to cut off, and the resultant pulse in the anode circuit is transferred as a negative pulse to the grid of a normally conducting valve. 23 and bias it to cut-off. The resultant potential increase at point 28 which is used to make valve 4 of the indicator effective, also increases the potential on the screen of valve 15 to increase the effect of the ignition pulse. When the pulse ceases, the potential at point 28 is maintained for a time dependent on the time constant of the grid circuit of valve 23 the output of which is therefore of square topped pulse form. In a multi-cylinder engine, independent pick-ups 2 and ignition condensers 8 control common indicating equipment. The ignition condenser, Fig. 2, comprises the insulated ignition wire 10 and an insulated sleeve 13 carried in bushings 11 in a conducting screening sleeve 9 which is connected to the screening 7<SP>1</SP> of the ignition lead, connection to the control circuit being taken from sleeve 13 by insulated lead 14.
Patent GB-496023-A (GB)
Title: Improvements in and relating to processes and apparatus for the manufacture of compound cast metal bodies
IPC: B22D19/08
Filed: 1938-03-19
Abstract: 496,023. Casting composite bearings. DAELEN, F., and LOOS, W., (trading as GLYCO-METALL-WERKE DAELEN & LOOS), and KOHLER, H. March 19, 1938, No. 8552. [Class 83 (i)] Casting - machines; metalpouring.-In casting compound bearings &c. a solid body b is introduced into a mould a, of graphite mixed with or without clay, 4 to 6 mm. thick, which is filled with borax or the like at 1200‹ C. When the body is at the same temperature as the borax, the copper-lead or other lining metal is poured in, displacing the borax, and the whole is cooled by placing in a water bath and directing a spray of water into the core. The body b is preferably provided with a hollow core c closed at its lower end c<1>, and preheated to about 500‹ C., the mould is electrically heated during and, for a time, after pouring and the support e or the ladle is rotated about the axis of the body during pouring. The mould is finally broken away and the body machined. The core may be of metal and be supported by lightly-welded angle pieces d or of the same material as the mould and preferably integral therewith. The mould may be tilted during pouring to avoid bubbles being trapped at bl.
Patent GB-1382908-A (GB)
Title: Plate shears incorporating an overload protection arrangement
IPC: B23D33/00
Filed: 1972-02-24
Abstract: 1382908 Shearing MOELLER & NEUMANN GmbH 24 Feb 1972 [26 Feb 1971] 8600/72 Heading B3W A plate shears comprises a frame 10, upper and lower cutters 3, 4 mounted for relative vertical movement in carriers 1, 5, means for adjusting the horizontal cutting gap and an overload protection device including a support element 7 supporting or embodying one of the cutter carriers and connected to the frame 10 through means 12 which fractures if an excessive horizontal force occurs in the gap to permit the support element 7 to yield relative to the frame 10. In one embodiment, Fig. 1, the horizontal cutting gap between a lower cutter 4 and an upper cutter 3 mounted in a displaceable carrier 1 is adjustable by at least two wedges 6, each supported on a member 7 pivoted at 8 to the shears frame 10. The lower end of the member 7 is secured to blocks (14, 15) (Fig. 2, not shown), connected to the frame 10, by means of shear pins 12, (13), which fracture when an overload occurs allowing the member 7 to swing towards the frame 10. In another embodiment, Fig. 3, the lower cutter carrier 20 is connected to the frame 27 by bolts 25, 26 secured at one of their ends to the frame 27 and carrying nuts 30, 31 at their other ends. When an overload occurs, the nuts 30, 31 fracture at points (31c) (Fig. 4, not shown) allowing the carrier 20 to pivot about a shaft 32 away from the frame 27.
Patent GB-751136-A (GB)
Title: A metal-tube pedestal for office machines
IPC: A47B21/04
Filed: 1954-03-24
Abstract: 751,136. Stands for calculating &c. machines. OLYMPIA WERKE AKT.-GES. [formerly OLYMPIA WERKE WEST GES.]. March 24, 1954 [April 21, 1953], No. 8605/54. Class 52(3). A pedestal for office machines e.g. calculating or accounting machines, comprises a metal tube frame having cranked top members 6, 7 the higher parts of which carry a table 8 and the lower parts of which carry a rotatable machine support which can be clamped in adjusted position. The support, to which the machine may be detachably connected, comprises, as shown, sockets 19 on horizontal plates 17, 18 at the ends of a cross bar 16 which is rotatably mounted on a spindle 14 mounted in a member 13 joining the members 6, 7. The ends of spindle 14 are threaded in opposite senses and take into screwed bushes in the member 13 and bar 16. Spindle 14 has a hand-wheel 15 and upon rotation thereof the support is clamped in position by frictional engagement of plates 17, 18 with plates 11, 12 fixed to members 6, 7.
Patent GB-1459298-A (GB)
Title: Electric circuit breakers
IPC: H01H73/26
Filed: 1974-02-27
Abstract: 1459298 Automatic circuit breakers OTTERMILL Ltd 27 Feb 1974 8825/74 Heading H1N An alternating current circuit-breaker trip latch is held by a member 17 and released when excess current causes movement of the member 17 due to heating of a current carrying bimetal 22 or attraction of an armature 28 by a coil 20 in series with and carried on the bimetal 22. A member 24, 25 on the core 20 extends to act on the member 17 after a predetermined bimetal movement. The breaker is used on an A.C. system and overload the armature 28, which is movable in a slot 32 in the member 17 exerts a series of vibrating impacts on the end 32 of the slot 32 to effect unlatching.
Patent GB-896932-A (GB)
Title: Control of supply to an inductive load
Inventor: WOODWARD WILLIAM HENRY
IPC: H02P7/29
Filed: 1959-03-13
Abstract: 896,932. Automatic control systems. LANCASHIRE DYNAMO ELECTRONIC PRODUCTS Ltd. March 3, 1960 [March 13, 1959], No. 8843/59. Class 38 (4). A control system comprises a transistor amplifier arranged to regulate the mean current supply to an inductive load by switching from a low power output condition to a high power output condition and vice versa at intervals so regulated as to control the effective current supply, a smoothing rectifier being connected in parallel with the load in conjunction with an inductance connected in series with the supply to prevent the flow of an excessive reverse current through the rectifier due to the capacitance thereof. As shown, the load comprises the armature of a motor M having an interpole winding 1, an inductance L1 and a resistance R2, the rectifier D1 being connected across the load and an inductance L2 being connected in series with the supply. The armature current is regulated by output transistors T6 controlled by transistors T1 and T2 arranged as a bi-stable multi-vibrator trigger circuit having one condition wherein the transistors T6 are switched to deliver maximum current and another condition wherein the output is switched off or reduced to a low value. A source 3 of negative voltage is provided, and a feed-back from the armature circuit is obtained by means of a potential divider 4 and is fed into an integrating circuit 5, the outputs from the source 3 and the circuit 5 being transmitted to the transistor T1 through resistances 6 and 7. The action is such that when the transistors T6 deliver maximum current the current fed back from the potential divider 4 to the junction-point 8 of the resistances 6 and 7 rises, whereas during minimum output the feed-back current falls, and the potential shift at the base of the transistor T1 acts to vary the output from the transistors T6 to oppose any deviation in the armature current. Specification 871,999 is referred to.
Patent GB-547941-A (GB)
Title: Improvements relating to holders for electric lamp caps of the screw type
IPC: H01R33/22
Filed: 1941-07-14
Abstract: 547,941. Lamp-holders. BRITISH THOMSONHOUSTON CO., Ltd., WIDNALL, F., and THORPE, F. W. July 14, 1941, No. 8908. [Class 38 (i)] A screw-socket lamp-holder has a resiliently mounted annular plate 9 associated with the socket 6 so as to press upon the rim of the lamp cap and hold it in firm contact with the socket. The plate is guided upon rods 8 around which the springs 11 are arranged, a metal base 2 supporting the rods and carrying an insulated strap 13 which supports the centre contact 12. This is guided by a member 16 and is urged forward by a spring 15, its motion being limited by a terminal arm 17 attached to the contact and extending to the periphery of the base 2. The centre contact may be mounted on a lever arm. The holder is supported by a crown member to the lower end of which a gallery is attached as described in Specification 373,774, [Group XI].
Patent GB-848525-A (GB)
Title: Improvements in and relating to apparatus for the measurement of the hydrazine content in a solution
Inventor: HOLY HAROLD WALTER
IPC: G01N27/49
Filed: 1958-03-20
Abstract: 848,525. Determining physical qualities of materials. CAMBRIDGE INSTRUMENT CO. Ltd. March 20, 1959 [March 20, 1958], No. 8923/58. Class 37 An electrolytic cell for measuring hydrazine concentration uses electrodes of silver-silver chloride and gold or other noble metal immersed in a chloride electrolyte. As shown, boiler feed water is fed via two constant head towers 34, 37, a flowmeter 35, a mixer 36 and a three-way tap 38 to the electrolytic cell 39 in which hydrazine content is measured. The measuring cell 39 is responsive to iron and copper as well as hydrazine hence calibration is necessary using water from which the hydrazine has been removed in vessel 42 containing a heated platinum black helix. The measuring cell 39 comprises a glass tube 1 having two apertured nylon stoppers 2, 3 respectively supporting a gold electrode 12 and an open ended glass vessel 7 containing a silversilver chloride electrode 9. Ten per cent potassium chloride solution heated by element 23 flows from vessel 19 via a capillary tube 21, through the glass vessel 7 and over the gold electrode 12. The test water is admitted via the stopper 2 and mixes with the potassium chloride electrolyte, flowing to waste through holes 6 and over'a lip 5. The current in an external circuit connected by terminals 10, 13 is proportional to the hydrazine content. An external potential may be applied to minimize current due to other impurities. A second gold electrode 14 is provided for measuring high concentrations of hydrazine. Impurities deposited on the gold electrodes may be removed by passing a current from an external source between a platinum wire helix 17, wound on a polyethylene sleeve, and the gold electrodes 12, 14.
Patent GB-1016084-A (GB)
Title: Reactive triazine dyestuffs
IPC: C09B62/04
Filed: 1964-03-03
Abstract: The invention provides reactive triazine dyes of formula <F\1> in which n is 2 or 3 and the term "chromogen" indicates azo or anthraquinone nuclei.  The dyes are made by conventional processes and give yellow-red-blue shades on cotton.
Patent GB-590052-A (GB)
Title: Improved hot-melt compositions
IPC: C08K5/03
Filed: 1945-04-11
Abstract: A composition for coating or sealing articles comprises a mixture of polyethylene and chlorinated naphthalene, having a viscosity at 190 DEG  C. of between 10 and 700 poises.  Compositions which are easily applied when heated to between 140 DEG  and 190 DEG  C. contain one or more chlorinated naphthalenes having melting points between 90 DEG and 130 DEG  C. and between 5 and 60 per cent by weight of polythene. Dyes and pigments may be incorporated in the compositions and appreciable quantities of microcrystalline wax of softening point between 60 DEG  and 65 DEG  C. may be added as diluents. Specification 569,043 is referred to.
Patent GB-350083-A (GB)
Title: An improved spiral rotary cutterhead and knives for wood smoothing and planing and like machines
IPC: B27G13/02
Filed: 1930-03-21
Abstract: 350,083. Wood-working cutters. HOLMES, J. W., 463, Brunshaw Road, and HOLMES, N., 465, Brunshaw Road, both in Burnley. March 21, 1930, No. 9032. [Class 145 (i).] Thin knives 5 are held to the cutter head 4 by clamp plates which fit into spiral channels 3, and have a groove 9 upon them to free shavings. The knives are initially flat and of the form of circular arcs.
Patent GB-703010-A (GB)
Title: Improvements in or relating to the production of moistureproof films coated with vinylidene chloride copolymers
Inventor: BERRY WILLIAM
IPC: C08J7/056
Filed: 1951-04-18
Abstract: Copolymers are obtained by polymerization of a mixture comprising (a) 92 per cent. to 96 per cent. of vinylidene chloride (b) 7 3/4 to 2 per cent. of one or a mixture of any two or all three of methyl methacrylate, acrylonitrile and ethyl acrylate and (c) one or more of itaconic or citraconic acid or anhydride, or mesaconic acid, the proportions being selected to total 100 per cent.  (c) May be a mixture of acidic anhydrides, including citraconic and itaconic anhydrides, obtained from citric acid by distillation.  The copolymer may be made by an emulsion polymerization process, dispersing agents specified being condensation products of formaldehyde with a naphthalene sulphonic acid or an alkyl substituted naphthalene sulphonic acid or alkali metal or ammonium salt thereof.  The catalyst may be ammonium persulphate activated by sodium metabisulphite.  The copolymer dispersion may be acidified to a pH of 1-4 and used in the production of moisture proof films (see Group VIII). Specifications 649,719, 654,342, 663,645, [Group VIII], 675,477, 677,183, 677,184 and 677,926 are referred to.
Patent GB-1037833-A (GB)
Title: Improvements in or relating to the construction of electronic equipment
Inventor: WOLFE BRIAN SINCLAIR
IPC: H03F1/54
Filed: 1963-03-07
Abstract: 1,037,833. Automatic change over of faulty amplifiers. ELLIOTT BROS. (LONDON) Ltd. March 6, 1964 [March 7, 1963], No. 9167/63. Headings H3T and H4R. Two similar amplifiers A1 and A2 are arranged for connection alternatively in a signal circuit, one amplifier A1 being coupled to a circuit FD which on detection of a fault in amplifier A1 connects amplifier A2 in its place, the switching being accomplished by diodes D1 to D4. In the preferred embodiment, Fig. 2, the amplifiers are connected in circuit by the diodes D1, D2, D3, and D4, the circuit being such that whilst transistor VT1 in amplifier A1 is operating correctly transistor VT2 conducts and maintains terminal A positive with respect to terminal B causing diodes D1 and D2 to conduct and diode D3 and D4 to be cut off so connecting amplifier A1 in circuit and disconnecting amplifier A2. If transistor VT1 fails, e.g. due to a shortcircuit from emitter to collector, transistor VT2 ceases to conduct and terminal B becomes more positive than terminal A causing diodes D1 and D2 to be back biased, disconnecting amplifier A1, and forward biasing diodes D3 and D4, to connect amplifier A2 in circuit. The change in potential at point C when the change-over occurs may be used to operate an alarm device.
Patent GB-526629-A (GB)
Title: Process for the production of a cellulosic material from vegetable matter
IPC: D21C5/00
Filed: 1939-03-23
Abstract: 526,629. Refining cellulosic materials. CELEC CORPORATION, Ltd., PHILLIPS, S. M., and BAKER, A. March 23, 1939, No. 9168. [Class 2 (ii)] Fibres from plants such as sisal, phormium tenax and the like in which the fibres are normally enclosed in a fleshy covering are first treated to remove this covering, e.g. by mechanical decortication or by chemical or water retting means, and whilst the crude fibres thus exposed are still in the undried or green state, the cementing substances are removed by a chemical solvent to such an extent that the fibre bundles separate into individual fibres. The cementing substances are preferably removed by immersing the fibres firstly in an alkali solution, then in a solution of a phosphate, followed if desired by a solution of sodium bisulphite or other reducing agent, then in a weak acid solution, and again in a phosphate solution. Phosphate solutions employed include triphenyl, tributyl, and sodium dihydrogen phosphates, which remove gums and resins. The bisulphite removes chlorophyll. In an example, the fibres are treated with a hot or boiling solution of sodium carbonate and then with a boiling aqueous medium containing tributyl phosphate and an emulsifying agent. The fibres are treated with a boiling solution of sodium bisulphite, and then with a 1 per cent. boiling solution of hydrochloric or acetic acid. They are boiled with sodium dihydrogen phosphate containing sulphonated castor oil, an organic pyridine salt, an organic sulphate, or other wetting agent. They may then be boiled with a solution containing sodium carbonate and a reducing agent such as sodium hydrosulphite, sodium formaldehyde-sulphoxylate, to remove colouring matter and render the fibres white.
Patent GB-474449-A (GB)
Title: Improvements in the production of zinc coatings by electrodeposition
IPC: C25D3/24
Filed: 1936-03-27
Abstract: 474,449. Electrodeposition of zinc IMPERIAL CHEMICAL INDUSTRIES, Ltd. (Du Pont de Nemours & Co., E. I.) March 27, 1936, Nos. 9190, 9526, and 12738. [Class 41] The electrolyte, an aqueous solution containing zinc cyanide, an alkali metal cyanide and an alkali metal hydroxide, is purified by one or a combination of the following methods and then electrolyzed, at certain cathode current densities. The methods are : (1) Addition to the bath of a reducing agent, e.g. sodium bisulphite or thiosulphate, phenyl hydrazine hydrosulphate or formaldehyde ; this precipitates the impurities which fall to the bottom of the bath ; (2) preliminary electrolysis of the solution, using low anode current densities, e.g. up to 15 amps. per sq. ft. ; the impurities are precipitated on the (zinc) anode ; (3) subjecting the bath to a galvanic action, as by hanging zinc anodes in intimate contact with the sides of the iron or steel tank containing the solution, or covering the bottom of the tank with granulated zinc ; the impurities precipitate on the anode ; (4) forming in the solution flocculent, colloidal precipitate, which apparently adsorbs impurities ; e.g. adding an aqueous solution of ferric sulphate, ferric hydroxide being produced ; (5) adding to the bath sulphur compounds which are soluble therein and which precipitate heavy metals, e.g. cadmium, lead and tin, as insoluble salts ; such compounds are sodium, potassium, barium, hydrogen and zinc sulphides ; sodium or potassium thiosulphate ; sodium hydrosulphite, thiocyanate or thiocarbonate ; potassium ethyl xanthate ; thiourea ; and tetramethylthiuram monosulphide. Using methods (1) to (4), the cathode current efficiency is at least 90 per cent. Using method (5) the efficiency may be 90 per cent or more or less. In the higher part of the range 90-100 per cent, bright coatings are obtained; in the lower part, dull coatings. Below 90 per cent, i.e. using the sulphur compound method, the deposits have a yellow to brownish coating. The dull or coated deposits may be given a bright, mirror-like appearance either by dipping in (a) sulphuric acid and either hydrogen peroxide or chromic acid, (b) nitric acid, or (c) sodium cyanide solution containing hydrogen peroxide, or by electrolytic treatment, making the coated article the anode in an alkaline electrolyte containing sodium cyanide. The brown film may also be removed by allowing the wet article to stand in the air for a short time. Before dipping, the deposits may be washed and treated with sulphuric or hydrochloric acid. The anodes used may be of pure zinc or a zinc-mercury alloy containing 1 to 2 per cent of mercury. A spherical cathode concentric with a hollow spherical anode may be used. According to the third Provisional Specification, organic colloids may be added to the bath.
Patent GB-1172094-A (GB)
Title: Apparatus for Forming Bearing Races
IPC: B21K1/04
Filed: 1968-02-26
Abstract: 1,172,094. Making bearing races; forging; punching; shearing. FEDERAL MOGUL CORP. 26 Feb., 1968 [8 March, 1967], No. 9277/68. Headings B3A, B3H and B3W. An apparatus for forming a pair of bearing race rings comprises single die 12 and punch 14 sections for forming a flat workpiece from stock 16, separating the workpiece into a centre workpiece 50 and an annular workpiece 52 and forming the two workpieces into race rings. A steel bar 16 is sized by a die 18, induction heated to above 1000‹ F. and a billet sheared from the bar by a shear 22. The billet is transferred to a die cavity 24 and pressed into a flat shape by a punch 26, after which the flat workpiece is transferred to a die 42 where a punch 36 punches out a centre web 32. At the following station, the workpiece is sheared by a punch 46 to form an outer annular workpiece 52 and a centre annular workpiece 50, the latter of which is pushed downwardly by a slide 56 to a die assembly 58 where it is formed into a race ring 60 by a punch 62. The other annular workpiece 52 is transferred to a die cavity 70 to be formed into a race ring 72 by a punch 68. The race rings 60, 72 may be cold formed in which case interstage annealing may be necessary. All of the operations carried out at the various stations occur simultaneously for each actuation of the punch section 14.
Patent GB-879847-A (GB)
Title: Aluminium plating
Inventor: BREINING ELMER ROBERT
IPC: C23C16/20
Filed: 1960-03-16
Abstract: A heated object is coated with aluminium by contacting it with an atmosphere comprising a heat-decomposable aluminium alkyl and an olefine.  Specified aluminium alkyls are aluminium triiso-butyl, -propyl, -amyl and -hexyl, and diethyl isopropyl aluminium, propyl diisobutyl aluminium and ethyl propyl isobutyl aluminium.  Specified olefines are isobutylene,  -butylene, b -butylene, ethylene, propylene, 3-methyl-butene-1 and cyclopentadiene.  The atmosphere may also comprise a carrier gas such as argon, helium or nitrogen.  The object, which may be of steel or copper, is preferably heated to 500 DEG -700 DEG F. p
Patent GB-259131-A (GB)
Title: Improvements in and relating to electrical condensers
IPC: H01G4/18
Filed: 1926-04-09
Abstract: 259,131. Macdonald, D. M., and Dubilier Condenser Co. (1925), Ltd. April 9, 1926. Condensers have a dielectric in the form of a film or sheet of pure cellulose esters made without the aid of plasticisers, thereby removing a source of dielectric loss introduced as foreign matter by the plasticiser. The ester (such as cellulose acetate) is dissolved in a suitable solvent (such as acetone) and the solution poured on a band, preferably endless, which passes under a spacing bar and produces a film of requisite thickness. The dried film can be removed and wound on a reel or can be incorporated in a cylindrical or flattened roll condenser with foil or metallized paper, the roll being impregnated with wax, oil, or the like, with or without the application of vacuum or pressure.