baber/WOPTO huggingface dataset:
Patent GB-707811-A (GB)
Title: Improvements in or relating to a motor speed control
IPC: G05D3/14
Filed: 1950-03-29
Abstract: 707,811. Automatic speed control systems. GARRETT CORPORATION. March 29, 1950 [April 6, 1949], No. 7841/50. Class 38(4) A speed control for an electric motor having an armature, and a running field and a speed control field comprises a switching device rendered operative by deviation of the motor from desired speed to connect the control field to a control current source, the current in the control field tending to change the voltage applied across the armature. As shown the speed control is applied to a synchronizing system employing two series wound reversible motors 10, 11 for moving the ailerons of an aircraft. The motors 10, 11 have armatures 12, 13 and running fields 14, 15, and 16, 17 respectively, the armature being connected on one side to one side of the power source and on the other to the common leads of the running fields. As well. as being connected to the ailerons the motors 10, 11 are connected through suitable reduction gears to arms 30, 31 of potentiometers 34, 35 which form a bridge circuit which includes the winding 40 of a normally open polarized relay 41. The relay 41 controls the position of a switch contact 45 which is given a negative polarity whilst a manually operated switch 60 connected to the positive side of the power source serves to energize one or other of relays 65, 66 controlling the direction of rotation of the motors through relay operated contacts 75, 76, and 80, 81. Assuming that the switch 60 is thrown to the dotted line position shown the relay 66 is energized and contacts 80, 81 assume the position shown in dotted lines. The motors then rotate under the control of field windings 14 and 16. If the motor 10 speeds up, or the motor 11 slows down the bridge circuit becomes unbalanced so as to energize the polarized relay 41 in a sense to make contact between contacts 45 and 47. As a result (a) an increased current flows through the field 14 and causes an increased drop across the field with a subsequent decrease of voltage applied across armature 12 and (b) the direction of current in field 15 is such that the magnetizing force created thereby is aiding and in the same direction as that in the field 14. Accordingly the motor 10 is slowed down or the motor 11 speeding up the contact 45 of the relay 41 makes contact with contact 46 and as a result of the consequent current flow through fields 16 and 17 the motor 11 is slowed down. The apparatus may be modified by interchanging the bridge leads 38, 39 and applying to the conductor 50 a positive contact of a negative polarity so that the slower of the two motors is made to speed up. By enploying a 'bridge upon a bridge' circuit the control system may be applied to the synchronizing of a group of motors.
Patent GB-626942-A (GB)
Title: Improvements in or relating to coupling devices for coupling rotating parts
IPC: F16D3/04
Filed: 1946-03-13
Abstract: 626,942. Shaft couplings. VICTORIA MACHINE TOOL CO., Ltd., COOPER, A. G., and FRYE, J. March 13, 1946, No. 7850. [Class 80 (ii)] An Oldham type coupling has rolling antifriction means for supporting end thrust between the elements of the coupling. In an embodiment for driving a tool 12 from a machine spindle 11, the driving spindle has slidably but not rotatably mounted thereon a collar 14 having a transverse keyway 4 which is engaged by a key 7 of a coupling member 5 which has a further key 6 engaging with a transverse keyway 3 in the end of a cap 13. Four rollers 9 are housed in the grooves 8 transverse to the keys and are arranged to be just proud of the surface of the coupling member 5. The assembly is held against axial movement by a stud 10 passing through clearing holes 15, 16 in the members 5, 13 respectively, slight axial adjustment of the coupling being provided by the screwed rings 33. The remote end of the cap 13 is bored to receive the shank of the tool 12 which is firmly held against the end of the bore 27 by wedge section locking keys 23 which co-operate with transverse grooves 21 in the shank, these keys are pressed inwards by a taper bored sleeve 28 which co-operates with the arcuate outer faces 25 of the keys when the sleeve is moved axially towards the tool by the screwed ring 30.
Patent GB-385486-A (GB)
Title: Improvements in or relating to apparatus for the treatment of textile material, and more particularly for moistening, steaming and ironing stockings
IPC: D06C7/00
Filed: 1932-03-16
Abstract: 385,486. Ironing-machines. SCHUSTER, F., 39, Furtherstrasse, Chemnitz, Germany. March 16, 1932, No. 7873. Convention date, Jan. 9. [Class 138 (ii).] Stockings carried on forms 1 moved by an endless chain or similar conveyer past spraying nozzles 4 and through calendering rolls 5, 6 and a drying chamber 7 are passed between one or more pairs of rollers 8, 9, having a facing of or made wholly of soft rubber, after leaving the damping device. When more than one pair of rollers are used the facings may be of different thickness, as shown, or of different hardness.
Patent GB-1165830-A (GB)
Title: Process for the preparation of Polyurethanes
Inventor: MUELLER ERWIN
IPC: C08G18/44
Filed: 1968-02-19
Abstract: 1,165,830. Polyurethanes. FARBENFABRIKEN BAYER A.G. 19 Feb., 1968 [28 Feb., 1967], No. 7943/68. Heading C3R. Polyurethanes are prepared by reacting a diisocyanate, a compound containing at least two hydrogen atoms which are reactive with isocyanates and having a M.W. below 500 and a linear hydroxyl-containing polycarbonate of M.W. 1000 to 3000 and based on 1,6-hexanediol and alkoxylated 1,6-hexanediol of the formula in which R = H or CH3. Aromatic diisocyanates are exemplified and the chain lengthening agents may be diols, diamines, hydrazine, hydrazides, carbazic acid esters or semicarbazides. Polycarbonates based on 1,6- hexanediol and #-hydroxyethyl-hexanediol or #-hydroxypropyl-hexane diol are exemplified. The polyurethanes may be prepared by the prepolymer method or by the one-step method.
Patent GB-549250-A (GB)
Title: Improvements relating to revolving mixing apparatus and to processes carried out therewith
IPC: B01F29/64
Filed: 1941-06-25
Abstract: 549,250. Mixing machines. BAYON, H. P. June 25, 1941, No. 7992. [Class 86] A rotary mixing apparatus comprises a steamjacketed drum 5 with mixing blades 27 therein carried on a driven shaft 15, the drum and shaft being carried by a cradle 6 mounted on trunnions so that the the drum can be tilted about a transverse axis for charging and discharging. Rings 12 on the jacket are engaged by flanged wheels carried by the cradle, one of the shafts carrying the wheels being driven and provided with a brake so that the drum can be allowed to rotate by drag of the material therein in the same direction as the shaft 15, or can be braked to increase the relative movement. Alternatively, the drum can be driven in the opposite direction to the shaft. A tank 31 is connected to a bore in the shaft 15 so that liquid or gas can be supplied to the drum by non- return valves 32. Discharging doors 36 and charging doors are provided. Chips, shavings and sawdust may be charged into the drum, impregnated with fluid reagents, the interior of the drum connected to an exhausting system whereby volatile constituents are withdrawn. Cresylic acid or xylol may be supplied, vapours being withdrawn. Finally a synthetic resin in fluid condition may be mixed with the treated wood and the plastic mass discharged for moulding.
Patent GB-1077337-A (GB)
Title: Improvements in the polymerisation of conjugate dienes
IPC: C08F36/04
Filed: 1966-02-23
Abstract: Polymers of conjugated dienes are prepared by an emulsion polymerization process wherein a catalyst or catalysts is or are introduced into the reaction medium during the course of the polymerization at a gradually decreasing rate. Polybutadienes having a molecular weight of more than 100,000, and having less than 17% of a 1,2-vinyl structure, more than 20% of a 1,4-cis structure, and less than 70% of a 1,4-trans structure, are preferred products of the process.  The catalysts may be organic peroxides, e.g. paramenthane hydroperoxide, together with reducing agents, e.g. ferrous salts. Modifiers, e.g. terdodecylmercaptan, may be present.  The rate of supply of catalyst preferably decreases exponentially.
Patent GB-1091555-A (GB)
Title: Valve arrangement for lubricant metering fittings
IPC: F16N27/00
Filed: 1965-02-24
Abstract: 1,091,555. Regulating fluid flow. AUTO RESEARCH CORPORATION. Feb.24, 1965 [Feb. 26, 1964], No. 8060/65. Heading G3H. [Also in Division F2] In a check valve for use in flow metering fittings (72-75 and 80) Fig. 3 (not shown) at the outlets to bearings (67-71) from a centralized lubricant distributer (65) e.g. a central reservoir pump or pressure unit, lubricant from inlet 83 flows through filter 88, supported by screen 89, and is metered through an accurately bored passage B containing a diamond drawn pin C, the diameter whereof determines the flow rate and which is supported by a check valve closure element seating at 23 and comprising a fluorinated silicone element D, preferably of 0À008" to 0À010" thickness and of a Durometer hardness of 65 to 75 which is provided with a mirror or press polish finish and is backed by a metal plate E which abuts a valve spring F supported by a retainer G provided with spaced peripheral flow passages 30. The inlet pipe 83 is secured by a double tapered sleeve 84 which is compressed between nut 94 and sleeve 86 which presses peripherally upon the filter 88 and the metering fitting is threaded into the bearing structure 56.
Patent GB-859535-A (GB)
Title: Intermediate band width crystal filter
Inventor: KOSOWSKY DAVID ISRAEL
IPC: H03H9/00
Filed: 1959-03-09
Abstract: 859,535. Crystal filter networks. HYCON EASTERN Inc. March 9, 1959, No. 8066/59. Class 40(8). A band-pass filter comprises two crystal resonators of different resonant frequency and effectively in parallel with each crystal a parallel combination of a capacitor and an inductor, the combination producing with the crystal an anti-resonant condition displaced from the crystal resonant frequency by an amount greater than the displacement therefrom of the crystal antiresonant frequency. In the lattice network of Fig. 3, the resonant frequencies (marked o on Fig. 4) of crystals A, B are arranged to define the lower half of the pass-band B o . The networks Lp, Cp resonate at frequencies slightly above the crystal resonant frequencies so that at these frequencies they appear as very high inductances. Thus the combinations of crystals and reactances produce antiresonant conditions at frequencies x which together define the upper half of the pass band B o . Each frequency x is greater than the anti-resonant frequency of the corresponding crystal. The networks Lp, Cp also produce antiresonances x defining a spurious pass-band B s , this being caused by the fact that the inductive reactance of each network L p , C p  resonates with the lattice which, in the region of B s , has an equal and opposite reactance (see the equivalent circuit, Fig. 5). This condition may be eliminated by arranging across the output a network C a , L a . The values of these reactances are arranged to be equal and opposite at the centre of the pass-band B o  so that they have no effect in this region. In the region B s , the network C a , L a  has a relatively low inductance and the attenuation of the filter remains high throughout this region. In practice, the network C a , L a  may be combined with the adjacent Lp, Cp network. By assigning slightly lower values to Lp, C p   a network may be produced having the attenuation characteristic of Fig. 8 in which the positions of the poles and zeros of the pass-band are effectively reversed. Fig. 9 shows a hybridtransformer equivalent network. The values of the impedances are modified as indicated, Lp<SP>1</SP> and Cp<SP>1</SP> denoting values of reactances including both L p , L a  and C p , C a .
Patent GB-855832-A (GB)
Title: An improved window envelope and method of forming same
Inventor: GIBBON JAMES
IPC: B65D27/04
Filed: 1957-03-13
Abstract: 855,832. Envelopes. KENRICK & JEFFERSON Ltd. March 10, 1958 [March 13, 1957], No. 8213/57. Class 146(2). [Also in Group XVII]  Open window envelopes are characterised in that the leading and/or trailing transverse edge or edges 5, 6 of the open window of the envelope blank 7 has or have been downturned and /or upturned respectively relative to the plane of the blank. The turning of the edges, which facilitates feeding of blanks from a stack, is effected by pressing between a pair of dies 8, 9 or alternatively by feeding the blank between a pair of co-operating die rollers.
Patent GB-569042-A (GB)
Title: Dicyandiamine-aldehyde syrups and processes of producing same
IPC: D06M15/423
Filed: 1941-07-01
Abstract: In the production of resinous syrups by the condensation of dicyandiamide with an aldehyde, stabilization and regulation of the viscosity of the syrup is obtained by carrying out the condensation reaction in the presence of a hydrophilic sol obtained by the condensation of melamine with aldehydes.  The sol is obtained by adding guanidine carbonate, ethanolamine, barium hydroxide, sodium hydroxide or like alkaline material to formalin until the pH of the solutions is adjusted between 6.0-6.5 and then adding melamine so that the ratio of formaldehyde to melamine is higher than 6 : 1, and then heating the mixture under reflux for at least 60 mins.  In examples: (1) 0.22 parts of guanidine carbonate are added to 220 parts formaldehyde (37 per cent) to adjust the pH to 8.54.  31.5 parts melamine are then added and the mixture refluxed for 60 mins., the pH dropping to 6.4; (2) the sol obtained in (1) above is mixed with 8 parts guanidine carbonate and 64 parts dicyandiamide and the mixture refluxed for 2 hours at 65 DEG  C.  A syrup which is stable for several months is obtained. Starches, carbohydrates, proteins, e.g. casein, soya bean, may be added to the syrups.
Patent GB-126486-A (GB)
Title: Improvements in or relating to Chess and like Boards.
Inventor: MASON JOHN WILLIAM VICTOR
IPC: A63F3/02
Filed: 1918-05-17
Abstract: 126,486. Mason, J. W. V., and Butcher, W. May 17. 1918. Board games.-A chess &c. board is provided with a cover in two parts which serve when closed to hold the pieces in position but are capable of being swung back under the board to form a support therefor. The board a is formed with holes to receive pins n on the pieces which are of uniform height. The half-covers f, g are connected to the board by pins h sliding in grooves b so that they can be reversed as shown in Fig 2. When opened, the covers are secured against turning by a locking-device consisting of a brass or other plate secured to the underside of the board with its ends projecting beyond the edges of the board to be engaged by slots in the ends of the covers f, g. When closed. the covers are secured by a shap fastening &c. Spaces k, l may be provided for retaining pieces not required on the playing portion of the board.
Patent GB-1035753-A (GB)
Title: Improved headlining assembly
Inventor: DAVIS ROY
IPC: B29C53/06
Filed: 1965-02-26
Abstract: 1,035,753. Laminates. IMPERIAL CHEMICAL INDUSTRIES Ltd. Feb. 26, 1965, No. 8374/65. Addition to 993,042. Heading B5N. [Also in Division E1] A motor car head-lining assembly of foamed plastics such as polyvinyl chloride or polyurethane, and having one surface moulded to the internal shape of the car roof and the other, exposed, surface covered with a decorative layer of plastics material, fabric, or plastics-coated fabric, or with a coating of plastics material, is characterized by the provision of one or more slits or grooves extending wholly or partly through the foam material to enable the assembly to be folded for introduction through the car door or window. The moulded surface may also carry a surface layer or coating. The assembly may be made by introducing foamable plastics material between male and female moulds one or both of which may contain suction-moulded surface layers, the slit(s) or groove(s) being formed by providing in, or inserting into the mould complementary projections or plugs, or being formed by cutting after moulding. Any surface coating, provided alternatively to the surface layer, may be applied by conventional methods to the moulded article.
Patent GB-470360-A (GB)
Title: Improvements in the manufacture and production of acetylene
IPC: C07C2/78
Filed: 1936-03-20
Abstract: <PICT:0470360/IV/1> <PICT:0470360/IV/2> In the manufacture of acetylene by partial combustion of saturated or less unsaturated gaseous or vaporized hydrocarbons or gases containing them, the combustion is effected in a flame burning freely over the whole cross-section of a reaction zone to which the mixture is fed at a speed greater than the speed of the flame and from which the products are withdrawn at a speed equal to or less than the speed of the flame.  Thus, the mixture may be fed through a tube A, Fig. 1, at a speed exceeding that of the flame, to a tube B of such a cross-section that the gas speed therein is less than the speed of the flame, which burns at that part of the apparatus at which the gas speed is equal to that of the flame.  An alternative apparatus comprises a tube B, Fig. 2, containing tapering fillers C, the flame in this case also burning at that part of the tube at which the free cross-section varies. A further form of apparatus comprises a tube in which a sieve-plate is inserted through which the gases are passed at a speed exceeding the speed of the flame; the gases emerging from the plate fill the whole cross-section of the tube, whereby their speed is reduced below the speed of the flame; the plate may be composed of a number of small tubes cemented together and widened at their ends, to avoid the formation of dead spaces between them. Ceramic materials, quartz, porcelain and chromium steels are specified as materials from which the apparatus may be made.  When the diameter of the cross-section over which the flame extends exceeds about 35 mm., the flow of the gases may be turbulent or non-turbulent, preferably the latter; with apparatus of smaller dimensions, the flow should be non-turbulent.  The position of the flame in the apparatus may be adjusted by regulating the speed of the gas and the speed of the flame, the latter increasing with increase in the oxygen content of the mixture; preheating the mixture also increases the speed of the flame.  The proportion of air, oxygen or other oxidizing gas in the mixture is appreciably less than one-half the amount necessary for complete combustion, but is sufficient to produce a flame without external heating of the reaction zone.  The temperature to which the gases are pre-heated must be below that at which spontaneous ignition occurs.  The reaction products should be chilled, e.g. by spraying with a liquid or by mixing with cold gases or by contact with cooled surfaces.  Examples are given illustrating the manufacture of acetylene by the partial combustion of methane, natural gas, and propane.
Patent GB-1287040-A (GB)
Title: Improvements relating to contacts of conductive members for semiconductor circuit assemblies
Inventor: MAGEE VINCENT
IPC: H01L23/485
Filed: 1970-02-21
Abstract: 1287040 Semi-conductor devices FERRANTI Ltd 19 April l97 [21 Feb 1970] 8434/70 Heading H1K A semi-conductor device 10 (Fig. 3) is fabricated by diffusion into silicon wafer 11 1 on which a passivating layer of silicon oxide 12 is provided; an aluminium layer 13 being deposited thereon to extend through apertures 14 therein to ohmically contact the wafer 11 by sintering. A further silicon oxide layer 15 is deposited over the first layer and the aluminium contacts by pyrolysis of silane and oxygen or A.C. dielectric sputtering, and part of the aluminium is exposed by photolithographic etching, coated with zinc 17 from zinc oxide and sodium hydroxide, etching off with nitric acid, and recoating with zinc; after which nickel 18 is deposited thereon from nickel chloride and sodium hypophosphite or borohydride. Molten tin based solder not wetting the oxide layer is applied to each aperture as a convex meniscus 19 protruding from the surface. On a glass or ceramic substrate 21 (Figs. 6, 7) a corresponding conductor array 20 is formed from an evaporative layer of aluminium or nickel photolithographically etched, over which a silicon oxide layer 22 is formed and photolithographically etched apertures 23 expose selected parts of the conductors, and the aluminium is chemically deposited with zinc 24 and nickel 25. Molten solder is applied at 26 to form a protruding meniscus 27 over each aperture, or alternatively the apertures may be formed in a photoresist layer (later removed) to selectively expose the conductors. A complete semi-conductor assembly 28 is formed by abutting and bonding the respective solder protrusions 19 and 27 to form spaced mounting pillars for the semiconductor assembly; alignment being facilitated visually through the substrate if of glass. Alternatively the semi-conductor array may comprise (Fig. 8, not shown) a circuit assembly mounted solderably on selected conductors of a lead frame which is unsupported. Either assembly may be encapsulated.
Patent GB-1177964-A (GB)
Title: A process for the manufacture of Isoprenyl Alcohols having 9, 11, and 12 Isoprene Units and new Isoprenyl Alcohols
IPC: C07C33/02
Filed: 1967-02-22
Abstract: 1,177,964. Isoprenyl alcohols. NISSHIN FLOUR MILLING CO. Ltd. 22 Feb., 1967 [22 Feb., 1966; 9 Dec., 1966], No. 8454/67. Heading C2C. The invention comprises isoprenyl alcohols of the formula in which n is 9 or 10 and a general process for obtaining a mixture of isoprenyl alcohols containing 9, 11 and 12 isoprene units of the above formula wherein n is 7, 9 and 10 comprising extraction of mulberry leaves or silkworm faeces with an organic solvent to give an extract containing saponifiable matter, treating the extract with an alkali metal hydroxide to yield a saponified fraction and an unsaponified fraction, separating the unsaponified fraction, subjecting the latter to fractional crystallization to give a crystallized fraction containing sterol, carotene and saturated alcohols and an uncrystallized fraction containing the required mixture of alcohols and subjecting the latter to molecular distillation to obtain a purified mixture of said isoprenyl alcohols. Suitable solvents for the extraction of the leaves-or faeces are acetone, chloroform, ether and hexane. Saponification is preferably effected with caustic potash-methanol. The unsaponified fraction may be separated by extraction with hexane/ methanol, washing the extracted solution with methanol and removing hexane by distillation. The unsaponified matter is then dissolved, e.g. in hexane or acetone and cooled to precipitate impurities which are filtered off. Molecular distillation may be effected under a vacuum of less than 10<SP>-3</SP> mm. Hg in a rotary film centrifugal apparatus. The initial fraction contains phytol, the required mixture of alcohols distilling at 180-240‹ C. The mixture obtained contains minor amounts of the 9-isoprene unit alcohol, the 11- and 12-alcohols comprising the major components. The distillate may be resolved into its component alcohols by adsorption chromatography on silica gel or active alumina. Alternatively, the 9-isoprene unit alcohol may be isolated by dissolving the distilled mixture in acetone and cooling to 0‹ to -10‹ C., whereby the 9-alcohol crystallizes from the solution. The 9-alcohol may also be isolated by formation of an adduct with thiourea in benzene solution, from which the 9-adduct preferentially crystallizes. In the latter method, the fractional crystallization step preceding molecular distillation of the alcohol mixture may be omitted. The process is illustrated by examples in which the novel 11- and 12-alcohols are isolated by adsorption chromatography over silica gel eluting with ether/hexane mixtures. Identification of the isoprenyl alcohols includes hydrogenation to the corresponding saturated alcohols.