baber/WOPTO huggingface dataset:
Patent GB-848047-A (GB)
Title: Time delay relay
Inventor: HORTON WILLIAM FRANKLIN
IPC: H03K17/28
Filed: 1959-02-03
Abstract: 848,047. Transistor relay circuits. LEAR Inc. Feb. 3, 1959, No. 3716/59. Class 40(6). A time delay apparatus comprises a transistor associated with a time delay network which, upon switching on the apparatus, delays the build-up of transistor current, the current being used to operate a relay arranged, when operated, to provide itself with a holding circuit independent of the transistor and to restore the time delay circuit to its initial condition so that the operation can be reinitiated without delay. In the figure, the operation of contact 10 causes a capacitor 20 to charge through resistor 28 until the resulting bias applied to the transistor causes sufficient collector current to flow to operate a relay 30. Contact 36 thereupon provides a holding circuit for the relay and completes a discharge path for the capacitor. Compensation for changes in temperature may be effected by connecting a temperature dependant resistor in series with resistors 18 or 28.
Patent GB-475180-A (GB)
Title: A method of purifying feed water for boilers
IPC: C02F5/02
Filed: 1936-02-07
Abstract: Feedwater for boilers generating highly superheated steam, after purification by one of the usual methods, has its alkalinity neutralized by means of an acid, for example sulphuric or sulphurous acid, before it is fed to the boiler.
Patent GB-659073-A (GB)
Title: Improvements in or relating to the production of plated powder-metal articles
IPC: C25D7/10
Filed: 1948-02-10
Abstract: 659,073. Electroplating powdered metal. EKSTRAND & THOLAND, Inc. Feb. 10, 1948, No. 3836. Convention date, Feb. 11, 1947. [Class 41] [Also in Group XXII] A method of making a plated powder metal compact comprises forming a self-supporting porous metal powder body having less than the ultimately required mechanical strength, plating the surface of the body with metallic material of chemical composition different from that of the powder by deposition from a solution in which the body is immersed in the absence of material pressure and from which solution residual salts are deposited in the pores of the body, the absence of pressure thus confining the deposited material and salts substantially to the surface layer of the body, and thereafter subjecting the plated body to heat treatment at a sintering temperature to effect the sintering necessary to produce the required ultimate mechanical strength and to volatilize and remove the residual salts. The powder metal may be partly sintered before being plated, the sintering being afterwards completed. If the plating solutions contain salts such as, for example, sodium or potassium cyanide, which it is difficult to remove by heating, the plated article may be treated by a neutralizing acid solution which will convert the cyanide salt to a salt more readily volatilized by the subsequent heating. An alloy may be formed on the powdered metal by deposition of two or more metals by successive treatment, followed by sintering which causes the metals to alloy with each other. An example of the process is given in which the metal powder compact was a mixture of 99 per cent iron powder and 1 per cent graphite powder, the compact being electro-plated with nickel. Specification 644,907 is referred to.
Patent GB-240353-A (GB)
Title: Improvements relating to teeth cleaning appliances
IPC: A46B7/04
Filed: 1925-02-11
Abstract: 240,353. Whittaher, N. M. Feb. 11, 1925. Teeth - cleaning appliances.-A rubbing pad 4, preferably of closelycompacted layers 5 of compressed fibre, such an absorbent cotton, compressed between outside strips 6 of fabric such as gauze, is detachably secured to a holder 1 having a channel-shaped groove with projections 2<1> on both sides of the groove. A row of stitches 8 may be employed to unite the layers of fibre. The pad when moistened swells out and is firmly held in the holder. Strips of fabric 7 may be interposed between layers of the fibre.
Patent GB-874340-A (GB)
Title: A method for producing a polyamide moulding material and moulded objects manufactured therefrom
IPC: C08K5/103
Filed: 1960-02-03
Abstract: A moulding material is made by mixing a linear polyamide with a stearate of diethylene glycol.  The mono- or di-stearate may be used. In the examples, diethylene glycol monostearate is mixed with granules of polyamides made from: (1) S -caprolactam, phosphoric acid and water and (2) S -caprolactam, acetic acid and water, the resultant compositions being injection moulded into combs. Polyhexamethylene diammonium adipate may also be used as the linear polyamide.
Patent GB-1176203-A (GB)
Title: Switching Circuits Employing Four-Terminal Semiconductor Devices
Inventor: BROCKWAY DENNIS VERN
IPC: H03K17/73
Filed: 1967-01-26
Abstract: 1,176,203. Switching systems for consumption apparatus. WESTERN ELECTRIC CO. Inc. 26 Jan., 1967 [10 May, 1966], No. 3931/67. Heading H2H. [Also in Division H3] In a switching circuit comprising a semiconductor switching device having four successive layers of alternate opposite conductivity type P1, N1, P2, N2 and a turn off circuit L.C. connected between the anode and cathode of the device, a first diode D1 is connected between the gate 5 and cathode 4, a second diode D2 connected between the gate 5 and anode 3 and a third diode D3 is connected between the cathode 4 and anode gate electrode 6 and the first diode has a reverse recovery time greater than that of the junction between the anode gate layer and the gate layer and the second and third diodes have a reverse recovery time less than that of that junction. The diode connections enable the ringing circuit L.C. to rapidly turn the PNPN device off when the trigger pulse has ended. The reverse ringing current passes through the three junctions J1 J2 and J3 until the junction J3 starts to recover then the reverse current flows through diode D3 to the junction J and as this junction recovers the reverse turn-off current is now caused to flow through the junction J2 and diode D2 so as to force a rapid recovery of the middle junction J2. As the junction J2 recovers the reverse current is diverted through diodes D1 and D2. Several circuits may be connected in series (Fig. 4) and the diode D2 in each circuit is replaced by a Zener type diode DZ. By applying a triggering pulse to the first device TH of the series connection the remainder are triggered on since the Zener diodes in each circuit break down causing a trigger potential across a resistor 7 connected in the gate to cathode circuit of each device TH. A series connected resistor RT and capacitor CT may be connected across the ringing circuit L.C., which is connected across the entire series connection, so as to speed up the firing of the devices. To obtain Zener type diode having a sufficiently fast recovery time a diode having a fast recovery time (8, Fig. 5, not shown), is connected in parallel with three Zener diodes connected in series with two parallel connected varistors (9).
Patent GB-972844-A (GB)
Title: Improvements in or relating to magnetic data-storage devices and data-stores including such devices
Inventor: BARNET PETER ALAN
IPC: G11C11/06
Filed: 1962-02-01
Abstract: 972,844. Magnetic storage apparatus. GENERAL ELECTRIC CO. Ltd. Feb. 1, 1963 [Feb. 1, 1962], No. 3966/62. Heading H3B. The co-ordinate insulated conductors 3, 4 of a magnetic data store are mounted on opposite faces of a non-magnetic sheet 2, each storage unit at the conductor cross-points comprising bands of ferromagnetic material 7 which extend over the conductors and are joined by magnetic material in holes 6 formed in the sheet. In one arrangement the conductors 3, 4 are printed on a sheet of polyethylene terephthalate 2 and are coated with an insulating layer of lacquer 5, the printing process involving the steps of coating the sheet with copper by a method of electroless deposition, increasing the thickness of electroplating, masking the conductor positions and etching away the surplus material. Round or rectangular holes 6 are punched after the printing process and the bands of ferromagnetic material and the magnetic material within the holes are formed by masking the sheet and using an electroless deposition process, the continuous films so formed being composed of 45% nickel, 45% cobalt and 10% phosphorus. The conductors 3 and 4 are energized by direct current during the deposition process so as to establish a preferred axis of magnetisation around each storage unit. Modifications comprise the use of a common hole 6 for each pair of adjacent storage units instead of two separate holes, and the extension of the bands of ferromagnetic material so that each magnetic film is common to a number of storage units. A second arrangement, Fig. 3, has the holes 6 filled with an epoxy resin 8 containing powdered mumetal or a powder formed from an 82% nickel and 18% iron alloy, the conductors being bridged at their crossing points by foils 9 of 80% nickel, 12% iron and 8% molybdenum alloy which are applied before the bonding resin is cured. The foils have a longitudinal preferred axis of magnetisation formed by grain orientation during manufacture, and a preferred axis is established in the bonding resin by energizing the conductors 3, 4 during the curing process. In a modification, the foils are replaced by the electroless deposition of nickel-cobaltphosphorus alloy films which are formed after the curing process is completed. Specification 972,846 is referred to.
Patent GB-371975-A (GB)
Title: Improvements in and relating to electromagnetic pick-ups for gramophones and the like
IPC: H04R11/08
Filed: 1931-02-07
Abstract: 371,975. Gramophone pick-ups. ROSEN, E. E., 238, Cricklewood Lane, and SARCHE, J., 10, Mocatta House, Brady Street, both in London. Feb. 7, 1931, No. 3972. [Class 40 (iv).] A gramophone pick-up comprises a permanent magnet a provided with L-shaped polepieces b each of which carries a soft iron core c surrounded by a winding f, the needle e, forming the armature, being pivoted at e<1> between the polepieces b whilst its inner end e<2> lies between the cores c. The polepieces b are secured together by a brass strip g and the armature pivot e<1> of soft iron is surrounded by a rubber tube e<4>. A thin rubber washer h may be slipped over the upper end of the armature as shown or this end may engage in a fibre cup supported by a rubber block, Fig. 3 (not shown) damping being effected by rubber washers stuck on to the faces of the cheeks of the bobbins f. According to a modification, Fig. 4, the needle may be received by a Y-shaped soft iron socket l provided with a screw m for fixing the needle in position and a closure n for preventing the needle from being inserted too. far. This socket is mounted through the intermediary of a rubber sleeve and rubber washers in the gaps between the poles band cores c.
Patent GB-1530821-A (GB)
Title: Production of chlorinated polymers
IPC: C08F8/20
Filed: 1976-02-02
Abstract: 1530821 Chlorinating a polymer blend; and recovery thereof IMPERIAL CHEMICAL INDUSTRIES Ltd 20 Dec 1976 [2 Feb 1976 27 July 1976 27 Aug 1976] 03999/76 31237/76 and 38362/76 Divided out of 1503976 Addition to 1503976 Headings C3P C3L and C3E A mixture of polymers is chlorinated in a solvent and recovered by contact with water or steam, the polymers comprising an aliphatic polymer (1) and up to an equal amount of a second polymer (2) having a second order transition temperature, when chlorinated, at least 20‹ C. below that of (1) when chlorinated. Polymer (2) improves the efficiency of the recovery process. The starting polymers are (1) natural rubber or a polymer of isoprene or butadiene, and (2) polybutadiene, a partially chlorinated polybutadiene or a butadiene copolymer. The example refers to the chlorination of a mixture of degraded cis-1,4-polyisoprene and a butadiene/α-methylstyrene copolymer in carbontetrachloride, followed by precipitation in hot water.
Patent GB-549672-A (GB)
Title: Process for the manufacture of derivatives of ª‡-cyano-ª†-acetyl-glutaric acid
IPC: C22F1/04
Filed: 1941-03-25
Abstract: 549,672. Glutaric acid derivatives. HOFFMANN-LA ROCHE & CO., AKT.-GES., F. March 25, 1941, No. 4014. Convention date, March 29, 1940. [Class 2 (iii)] Derivatives of α-cyano-γ-acetyl-glutaric acid are prepared by condensing an aldehyde or hydrate thereof with an acetoacetic ester and a derivative of cyanacetic acid, e.g. the ester, amide or nitrile, in presence of a secondary amine. The products are useful intermediates for the preparation of pharmaceutical compounds. Examples are given of the condensation of acetoacetic ethyl ester with (1) benzaldehyde and cyanacetamide; (2) benzaldehyde and malonodinitrile; (3) p-nitrobenzaldehyde and cyanacetamide; (4) isobutyraldehyde and cyanacetamide ; (5) isobutyraldehyde and malonodinitrile ; (6) phenoxyacetaldehyde hydrate and cyanacetamide ; (7) phenoxyacetaldehyde hydrate and malonodinitrile; and (8) cinnamaldehyde and cyanacetamide.
Patent GB-542272-A (GB)
Title: Improvements relating to powder blowers
IPC: B05B11/06
Filed: 1941-03-26
Abstract: 542,272. Powder blowers. SHAWCROFT, F. H. March 26, 1941, No. 4044. [Class 18] A powder blower has an exit opening d and a valve casing e in which a non- return valve such as a cycle tyre valve may be fitted, the valve being adapted for connection with an ordinary cycle tyre pump. A lid b with washer c are provided. The pump serves as handle to the powder blower.
Patent GB-266890-A (GB)
Title: Improvements in or relating to switch-operating mechanism for electric transformers
IPC: H01H9/00
Filed: 1926-02-12
Abstract: 266,890. Peebles & Co., Ltd., B., and Rodger, J. W. Feb. 12, 1926. Regulating transformers.-Switch operating mechanism for the tapping connections of an oilimmersed or air transformer comprises .a switch of the plug and socket type having its movable part carried by a rod or stem passing out through the transformer casing and capable of reciprocation to open and close the switch and of rotation to select which of the tapping connections shall be operative. The switch-operating rod A passes through a guide sleeve B which screws into a boss C<1> on a plate C secured beneath, and to, the tank cover by studs. The plate C supports by means of a tube H an intermediate guide bracket J for the rod A, the bracket carrying an insulating casing K for the switch parts. The rod A terminates in a hollow end A<1> co-operating with a guide pin L and carries a member N on which is mounted a socket member O forming the movable switch member. This member is longitudinally slotted at O<2> and grooved to receive three annular springs O<3> or a helical spring acting to keep the socket in close contact with the plug M. The plugs are six in nuber, as shown, and each is connected to its tapping con ductor M<1>. The sleeve B has a hexagonal part B<1> with which it may be adjusted, and a locking device, in the forms of a key B<2>, prevents rotary movement thereof after adjustment. The sleeve B also carried a cylinder E with a. number of slots E' in which can slide a lug F on the rod A. When the switch has been pushed home in the selected position, the lug F comes below an annular ridge E<2> and is padlocked to prevent withdrawal. At the bottom of each slot may be a mark showing the voltage or percentage increase in, or decrease from. normal voltage obtained by the selected tapping.
Patent GB-1567570-A (GB)
Title: Process for recovering the molybdenum present in waste products
IPC: C22B34/34
Filed: 1977-02-02
Abstract: 100 kg of spent catalyst waste (containing 8 % Mo, 1.5 % S and 2 % Co) on a support based on gamma alumina, freed from volatile matter, carbon and part of the sulphur by preliminary oxidising roasting, are mixed with 37.5 litres of aqueous solution of Na2CO3 (400 g/l) at 70 DEG C. An impregnated product is obtained which is heated between 650 and 750 DEG C for one hour. The product thus treated is washed with water so as to obtain a solution of sodium molybdate which is neutralised with a solution of nitric acid in three precipitation operations separated by a clarification. A precipitate of molybdic acid is obtained while the alumina remains in solution. After drying, this precipitate has an apparent relative density of 2 and contains 61.2 % Mo and 0.004 % Al. Molybdenum yield : 85 %.
Patent GB-693785-A (GB)
Title: Improvements in or relating to a vehicle for printing inks
IPC: C09D11/08
Filed: 1951-02-21
Abstract: A printing ink which can be set by application of steam and which produces a glossy surface, consists of a colouring material dispersed in a vehicle comprising a glycol-soluble water-insoluble resinous binder dissolved in a liquid polyglycol solvent and including from 0.5 to 5 per cent by weight of the vehicle of alcohol-soluble N-alkoxymethyl polymethylene polyamide having at least 10 per cent of the amide groups substituted.  Six examples of ink compositions are given: (1) adduct of rosin and maleic acid, zein, N-methoxymethyl-polyhexamethylene adipamide, dipropylene glycol, wax, barium red lake C pigment, Lithol rubine pigment; (2) as (1) but with Victoria blue pigment and, additionally, diethylene glycol; (3) as in (1) but with diethylene glycol and benzidine yellow pigment; (4) as in (1) but with diethylene glycol; (5) manila resin, zein, N-methoxymethyl polyhexamethylene adipamide, diethylene glycol, dipropylene glycol, barium red lake C pigment, Lithol rubine pigment, wax; (6) as in (1) with allyl starch instead of zein.  The wax may be a mineral or vegetable wax or a synthetic solid polyglycol wax. Other resins referred to are alcohol-soluble phenol-formaldehyde condensation products and the adduct of rosin and fumaric acid. N-methoxymethyl polyhexamethylene sebacamide is also referred to. Specifications 461,236, 461,237 and 573,482 are referred to.
Patent GB-375733-A (GB)
Title: Improvements in the construction of aeroplanes
IPC: B64C3/00
Filed: 1932-02-12
Abstract: 375,733. Aeroplanes. MESSIER, G. L. R. J., 29, Avenue Leon Gambetta, Montrouge, Seine, France. Feb. 12, 1932, No. 4223. Convention date, Feb. 16, 1931. [Class 4.] To enable an opening to be provided in the floor of an aeroplane fuselage having cantilever wings springing from the lower part of it, the wing spars are secured to longitudinal members 2, Fig. 4, acting in torsion and connected at their ends by cross members 21, or, as shown in Fig. 5, they are connected to members 8, 9 of a rectangular frame and upwardly bent parts B, B<1> of the spars are connected together by struts 5, 51. The parts 8, 9 may comprise flanged tubes secured to the spar plates, conical extensions 8<1>, 9<1> being similarly secured and connected together by cross-ties 10, 11. The parts 8, 9 in this case are not in torsion. The parts 5, B, B<1> of the rear spars or the rear spars themselves may be omitted. If an opening is required in the upper part of the fuselage, the struts 5, 51 may be replaced by a rectangular frame p, q, r, s similar to the frame 8 .. 11.
Patent GB-593086-A (GB)
Title: Improvements in or relating to incubators
IPC: A01K41/00
Filed: 1945-02-20
Abstract: 593,086. Incubators. WESTERN, L. G., and SAMUELY, F. J. Feb. 20, 1945, No. 4246. [Class 5 (ii)] Relates to incubators having egg trays in banks and arrangements for tilting the trays. In the form shown in Fig. 1, the trays 14 have projecting pins 17 slidable along lateral frame members 13, of L- shaped cross-section. The trays are freely pivoted on the pins 17 and the tilting mechanism comprises fixed pins or lugs 22 extending outwards at the rear end of the trays for engagement by the forked members 18 which are mounted on vertical rods 19, one of which is at the rear of each rack. By means of a handle 31 and shaft 27 a vertical movement is given to the bar 19 which then tilts the trays in either direction. Each pair of banks of trays is carried in a rack 6 mounted on trolley-wheels 7 and upper inner wheels 8 tracking along the rails 3 and 2 respectively. Fig. 4 shows the locking arrangement to retain the tray in the required angular position. The bolt socket 33 is secured to the upper end of the bar 19 and a spring-loaded lever 36 is moved so that the slide-bolt 34 engages the socket.
Patent GB-138919-A (GB)
Title: Improvements in and relating to the distribution valves of fluid pressure engines
IPC: F01L7/02
Filed: 1920-02-11
Abstract: 138,919. Doutre, F. P. L., and Irat, G. C. E. Jan. 20, 1917, [Convention date]. Valves.-The inlet and exhaust are controlled by a ported conical plug b which runs free of its surrounding casing and is supported by trunnions e mounted with ball and thrust bearings f in ad. justable plummer blocks g. The valve has admission ports b', 6<2> and exhaust ports c', c<2> which are bounded by partitions and alternately put the cylinders 1, 2 in communication with the admission ports a' and exhaust ports a<3>, a<5> respectively. Cooling-water is passed by way of the trunnions through the valves, and through a collector h to a jacket formed by a double casing j surrounding the cylinders,
Patent GB-115022-A (GB)
Title: Improvements in or relating to Artillery Projectiles.
IPC: F42B10/50
Filed: 1916-04-06
Abstract: 115,022. Compagnie des Forges et Acieries de la Marine et d'Homecourt. April 18, 1914, [Convention date]. Projectiles. - Consists in providing a projectile with two sets of wings x, y one over the other, the cuter one opening rearwards by centrifugal force when released by the destruction of a locking ring z<1> by a powder charge v fired by a time fuse r during the flight of the projectile, and the inner one then opening forwards. The object is to make the projectile fall steeply after a given time, the projectile being burst on impact by a percussion fuse p.
Patent GB-1222803-A (GB)
Title: Production of shaped articles from polycaproamide
Inventor: TWILLEY IAN CHARLES
IPC: D01F6/60
Filed: 1969-01-24
Abstract: 1,222,803. Melt spinning polycaproamide filaments. ALLIED CHEMICAL CORP. 24 Jan., 1969 [7 March, 1968], No. 4311/69. Heading B5B. [Also in Division C3] Filaments of anhydrous polycaproamide are produced by (a) polymerizing epsilon-caprolactam at an elevated temperature in the presence of water and a terminating agent to form a prepolymer; (b) polymerizing the prepolymer under reduced pressure to form an anhydrous molten polymer having less than 12 meq/kg. of minor species of unreacted end groups, less than 2À5% by weight of waterextractable material, less than 0À5% by weight of the monomer, and a formic acid relative viscosity greater than 30 units; (c) between its formation by step (b) above and extrusion in step (d) below, maintaining the polymer in the molten state, completely filling an enclosed system and out of contact with a gas, and preventing formation of stagnant zones of molten polymer; (d) extruding the molten polymer under pressure at 250‹ to 300‹ C. less than 2 hours after its formation to form filaments and solidifying the filaments by cooling. The proportion of water present in stage (a) may be 0.2 to 1À5% by weight. The terminating agent may be a monoamine, diamine or a dicarboxylic acid, the agent having at least 6 carbon atoms in the molecule. The acid may be an aliphatic, alicyclic, aromatic or heterochain dicarboxylic acid. It may be sebacic acid, or toluic acid. The monoamine may be benzylamine. The diamine may be m-xylylenediamine. The polycaproamide may be melt-blended with a minor proportion of another synthetic polymer such as a polyester, a polystyrene or a polypropylene prior to being fed to the spinning heads.