baber/WOPTO huggingface dataset:
Patent GB-1102792-A (GB)
Title: Alternator tachometer
IPC: G01P3/46
Filed: 1965-02-17
Abstract: 1,102,792. Measuring speed of internal combustion engines, electrically. STEWARTWARNER CORPORATION. Feb.17, 1965 [Feb.17, 1964], No.6871/65. Heading G1N. A tachometer (e.g. for an automobile engine) comprises a saturable transformer 72 (Fig. 2) the primary 74 of which is connected between an A. C . potential source (terminal 64), from an alternator 42 driven by the engine, and a D.C. bias potential at end 74b, and a meter 70 is connected to measure the time average secondary current as a function of speed. The alternator 42 charges a storage battery 50 through a three phase bridge rectifier network. One end of the primary 74 is connected via a resistor 78a to a positive D.C. potential at 58 and to earth via a resistor 78b so that the potential at terminal 64 fluctuates between earth potential and a positive potential approximating the voltage at 58 (Fig. 3a). In operation, with the transformer core saturated in say a negative direction the primary current wave (Fig.3b) follows the increasing voltage (Fig. 3a) and increases until at point X it causes the core flux density to drop below saturation level and the inductance of the winding therefore increases causing the current to level off. The core flux changes direction until at point Y it reaches saturation in the opposite or positive direction, where at the inductance being negligible the current again increases until it attains a level determined by the limiting resistors 78a, 78b. When the voltage at terminal 64 swings from earth potential in a positive direction relative to the voltage at the opposite end of the primary, the core is driven to saturation in one direction, and when the voltage at 64 swings in a negative direction the primary current reverses and the respective saturation points of the core are indicated at X' and Y' on Fig. 3b. The voltage induced in the secondary winding is shown in Fig. 3c, and follows the primary voltage during the periods X to Y and X' to Y' &c., when the core is not saturated. The secondary voltage is thus a function of the primary current and of the saturation time. The current output of the secondary across a portion of a potentiometer 91 is shown (Fig. 3d) and the average voltage drop thereacross is a function of the frequency of the pulses. By virtue of its mechanical inertia the meter 70 measures average current through it and is calibrated to indicate speed. An NTC resistor 98 may be provided in the secondary circuit to provide temperature compensation.
Patent GB-561992-A (GB)
Title: Improvements in and relating to resinous condensation products
IPC: C08G12/30
Filed: 1942-05-21
Abstract: Resinous condensation products are prepared by heating together an aldehyde and 4,6-diamino pyrimidyl-2 cyanomethyl sulphide, in the presence of a minor proportion of an alkali.  Many aldehydes and aldehyde addition products, which may be used, are specified, and specified alkalies are sodium, potassium and calcium hydroxides, sodium and potassium carbonates, and mono-, di- and tri-amines.  The reaction may be carried out in the presence of solvents or diluents, natural or other synthetic resinous bodies, or while the starting materials are admixed with other reactive materials, such as ketones, urea, thiourea, selenourea, guanidine, amides of mono- and poly-carboxylic acids, melamine, ammeline, ammelide, phenols, alcohols and amines.  Many modifying agents, which may be added before, during, or after effecting condensation between the primary components, are specified.  Those condensation products which are thermoplastic are useful as plasticizers for other synthetic resins, while those which are thermosetting may be mixed with fillers, pigments, dyes, mould lubricants or plasticizers, in the production of, e.g. moulding compositions. The resins may also be used in the production of paints, varnishes, lacquers, enamels, electrical insulating materials and adhesives.  Active or latent curing catalysts may be incorporated with the resins, and other specified optional additions are a -cellulose flock, zinc stearate, wood flour, glass fibres, asbestos, mineral wool, mica and cloth cuttings. Examples are given of the condensation of 4,6-diamino pyrimidyl-2 cyanomethyl sulphide with:-(1) formaldehyde; (2) formaldehyde and urea; (3) formaldehyde and phenol; (4) furfural; (5) acrolein; (6) formaldehyde and n-butyl alcohol; (7) formaldehyde and ethyl malonate; (8) formaldehyde and acetamide; (9) formaldehyde and glycerine; and (10) formaldehyde and polyvinyl alcohol. Specifications 554,195, and 9244/41, 10917/41 and 1458/42, all as open to inspection under Sect. 91, are referred to.
Patent GB-766517-A (GB)
Title: Improvements in or relating to thread tensioning devices particularly for use in winding frames
Inventor: SIEGEL MARTIN
IPC: B65H59/22
Filed: 1955-03-09
Abstract: 766,517. Thread tensioning devices. VEB SPINN-UND ZWIRNEREIMASCHINENBAU KARL-MARX-STADT. March 9, 1955, No. 6949/55. Class 120 (2). A thread tensioning device for use in winding frames comprises a casing 1, a bolt 2 anchored in the casing 1 and having rotatably mounted thereon two discs 3 and 4, a control knob 5 rotatably mounted in the casing 1 and provided with inclined recess 6 which has parallel flanks, and a hemispherical base and a ball 11 movable within the recess, the arrangements being such that the ball bears against one of the discs with a pressure which is adjustable by turning the control knob 5. A scale may be provided which is calibrated in accordance with the turning of the knob and thus indicates the tension on the yarn passing between the two discs 3 and 4.
Patent GB-307300-A (GB)
Title: An improved process and apparatus for automatically regulating the concentration of materials suspended in liquids
IPC: G01N11/10
Filed: 1929-03-04
Abstract: 307,300. Kõlle, T. March 3, 1928, [Convention date]. Mixing fluids in flow.-The concentration of a supply of material suspended in-a liquid, such as paper pulp, is maintained constant by supplying diluting liquid when necessary, this supply being controlled by means responsive to the impact of a projected stream of the pulp. As shown, the pulp is supplied from a vat 1, Fig. 1, by a pump 3 through a pipe 2, and diluting liquid is supplied by a pipe 5 through a valve 23 controlled by a servo-motor 19 operated in consonance with the concentration of the pulp. For this purpose, the pipe 2 is furnished with a branch pipe 6, Fig. 2, through which a portion of the pulp is circulated by a screw propeller 7 operated by a motor 8. The pipe is furnished with a constriction 24 through which a stream of the pulp is projected to which rotary motion has been imparted by the screw. If the concentration is low the stream retains its rotary motion and the jet spreads, whereby only a part of it impinges on a member 26; in the case of a high concentration the rotating motion falls and the jet consequently spreads less and impinges with greater force on the member 26. This member is carried by a metal rod 11 furnished with a contact member 12 and mounted in a flexible tube..10, the base of which is fixed in an outer tube 16. By these means a high concentration effects the movement of the member 26 and the closing of the contacts 12, 14. thus effecting the closing of the discharge valve 16 of the servo-motor; the piston 19 is then raised to open the valve 23 to supply the diluting liquid. The throttle 24 may be dispensed with.
Patent GB-596242-A (GB)
Title: Improvements in emulsions of polyvinyl resins
IPC: C08F289/00
Filed: 1945-03-20
Abstract: Vinyl compounds are polymerized in aqueous emulsion in the presence of a polypeptide obtained by controlled degradation of an animal protein.  The monomer specified is vinyl acetate.  Gelatine and fish glue are specified animal proteins which are peptised by heating in solution or by action of nitric acid.  Catalysts such as hydrogen peroxide, sodium or potassium persulphates may be used.  Dextrine, saponin and sodium butoxydiphenylsulphonate may be added.  Stable emulsions of polyvinyl resins are obtained which can be used to coat fabrics, as adhesives, or in making artificial leather.
Patent GB-525942-A (GB)
Title: Improvements in or relating to aeroplane wing-flaps and ailerons
IPC: B64C3/54
Filed: 1939-03-03
Abstract: 525,942. Aeroplane controls. ROBERT, R. March 3. 1939, No. 7054. Convention date, March 4, 1938. [Class 4] An aeroplane having wing flaps with portions pivoted to their trailing edges to act as ailerons, has control means so arranged that as the lift of the wings is progressively increased the flaps are brought progressively under the control of the lever which normally only controls the ailerons. The flaps are divided into two portions 1, 2 the portions 1 acting as ailerons during normal flight. The portions 1 are operated from a lever 4 through a shaft 5, an arm 6 links 7, 71 and links 8, 8<1>. In order that the control for the portions 1 should be unaffected by movement of the main control, the control effort is led from the link 8 through the links 27, 26, the common pivot of the links being disposed normally in the hinge axis of the portions 2. This object also may be achieved by leading control cables round the hinge of the portion 2, by crank mechanism operated through the hinge axis or through hand gearing driven through a splined shaft which includes a universal joint. The flaps as a whole are operated through links 9, 9<1>, connected by pivots 12, 12<1>, Fig. 11, to leads 16, 16<1> and arms U, 11<1>. The arms 11, 11<1> are pivoted to a lever 10 carried by the shaft 5. The links 16, 16<1> are connected to the movable part 15 of a jack 14. The pivots 12, 12<1> lie normally adjacent the shaft 5 and thus the portions 2 are independent of movement of the lever 4. On movement of the jack, the pivots 12, 12<1> are displaced to depress the flaps and now movement of the lever 10 displaces the,portions 2 in opposite directions. In a modification, the pivots 12, 121 are displaced through bevel and worm gearing operated by an electric motor. In a further form the links 9, 9<1> are pivoted to the movable part of a jack carried by the shaft 5. In order that the flaps may be moved by the lever 4 without relative movement of the portions 1, the links 7, 71 may be pivoted to bell-crank levers 42, 42<1>, Fig. 20, pivoted on the shaft 5 and connected to a jack 41 whereby the pivots between the cranks and the levers may be displaced to lie adjacent the shaft 5. In another modification, the shaft 5, Figs, 21, 22, carries a bell crank lever, one arm 43 of which normally forms an extension of the shaft 5. A ball on the end of the lever engages a link 44 connected to levers 45, 45<1> having ball ends through which pass inclined pins 48, 48<1> engaging the forked ends of shafts 47, 47<1> for moving the flaps. A jack 49 moves the lever 43 to cause depression of the flaps and as soon as'the lever 43 is out of alignment with the shaft 5 rotation of the latter moves the levers 45, 45<1> laterally and the inclined pins 48, 48<1> cause movement of the shafts 47, 471 in opposite directions.
Patent GB-251598-A (GB)
Title: Improvements in or relating to steam power plant
IPC: F01K7/38
Filed: 1926-03-15
Abstract: 251,598. Siemens - Schuckertwerke Ges. April 28, 1925, [Convention date]. Feedwater, heating. - In motor installations from which steam is tapped for heating purposes, such steam is taken solely from an auxiliary prime mover 4 which exhausts into a condenser 8 and is arranged in parallel to the main prime mover 3. The turbine 4, which is tapped at two stages 6, 7, receives through a nozzle 5 a constant predetermined quantity of steam. A pump 11 forces water from the tank 12 through feed water pre-heaters 10, 9 to an accumulator 13 supplying the steam generator 1. The turbine 3 is regulated solely in accordance with the load. In a modification the tapped turbine 4 is connected in parallel with the low-pressure section only of the main turbine 3.
Patent GB-182513-A (GB)
Title: Improvements in clutches
IPC: F16D11/10
Filed: 1921-03-05
Abstract: 182,513. Shaw, J., and Ida Starter, Ltd. March 5, 1921. Clutches, claw. - A sliding clutch sleeve E carries projections P engaging peripheral recesses in a flange L on a sleeve C keyed to one shaft A and sliding into engagement with corresponding recesses G in a flange M on a sleeve D keyed to the shaft B. Inclined surfaces H on the face of the flange M slope towards the recesses G and facilitate engagement of the promotions P therewith.
Patent GB-242146-A (GB)
Title: Improvements in bulkhead and like lamps
IPC: F21V5/02
Filed: 1925-03-18
Abstract: 242,146. Heyes &. Co., Ltd., and Heyes, W. A. March 18, 1925. Wall lamps.-The casing of a bulkhead lamp is formed in one with a junction box 2 for electric cable connections and is provided with a window 5 having one or more solid prismatic glass pieces integral with it, or adjacent, or attached to it. The window may be formed with two wedge shaped prisms 6 arranged with their inclined sides opposite each other so that part of the light is reflected laterally.
Patent GB-1081572-A (GB)
Title: Improvements in the electro-erosion of electrically conductive materials
Inventor: SMITH GORDON VICTOR
IPC: B23H1/02
Filed: 1965-02-19
Abstract: 1,081,572. Transistor pulse circuits. SPARCATRON Ltd. July 29, 1965 [Feb. 19, 1965], No. 7288/65. Heading H3T. [Also in Division B3] Electro-erosion machining apparatus for machining a workpiece by discrete electrical discharges across a gap between an electrode and the workpiece includes a number of parallel transistors connected in series with a source of voltage and the gap, signal pulses being supplied to the transistors to cause synchronous power pulses to be supplied to the gap, each signal pulse passing through a gate circuit which is locked open for the duration of the signal pulse. Under short circuit conditions the number of transistors in series is reduced to reduce the power delivery to the gap. The suppression circuit causing this power reduction is prevented from operating until a power pulse has been completed and before the commencement of the next pulse. The working gap G is supplied with power pulses from transistors T1-T15 whose bases are in turn fed with pulses from a variable frequency and mark-space ratio oscillator 20 via amplifiers 30, 40. The transistors T1-T3 operate under all conditions, but if the voltage pulses across the gap G disappear due to a short circuit or fall below a selected level as determined by the striking potential of Zener diodes ZD1 and ZD2 the junction between resistors R22 and R23 is raised to H.T. to prevent pulses from transistor T21 being transmitted via transistor T20 to power transistors T4- T15. A positive feedback from the base of transistor T20 via amplifier T19 to the base of transistor T17 ensures that the gate transistor T20 remains open until the end of a pulse even if short circuiting should occur during the pulse.
Patent GB-263002-A (GB)
Title: Improvements in and relating to the manufacture of printing plates
IPC: B41D3/00
Filed: 1926-03-16
Abstract: 263,002. Marks, E. C. R., (Wood Newspaper Machinery Corporation,). March 16, 1926. Stereotype, casting. A block 15 is detachably secured to one of the parts, preferably the core, of a stereotype mould for the purpose of forming a cavity in the plate for the reception of latenews type or slugs. Pins 13, Fig. 2, are screwed into the core 10 and the projecting ends 14 are bent to lie in the direction of movement of the plate when being removed from the core. The block 15 is of sufficient height to extend completely across the mould-cavity and is provided with apertures by which it is mounted on the pins 13. Removal of the plate from the mould results also in the removal of the block. The block is formed with recesses 17, Fig. 4, interrupted by parts 18 on the convex edges so that apertured ledges are formed on the sides of the cavity in the plate to facilitate the insertion and securing of the late-news types or slugs.
Patent GB-205020-A (GB)
Title: Improvements in or relating to pipes for smoking tobacco
IPC: A24F5/06
Filed: 1923-03-15
Abstract: 205,020. King, T. J. March 15, 1923. Tobacco pipes.-The bore of the bowl a is extended through the bottom, where it is closed by a removable plug b so that the bowl may be charged from the lower end. The tobacco rests on the dished or recessed upper surface of a clay, porcelain, or other member b<1> screwed into the plug b, which is of the same material as the pipe, e.g., briarwood. The plug is formed with a ;peripheral groove b' communicating with the dished upper surface by perforations b<6>. These are arranged so as not to be adjacent to the bore of the stem, locating marks such as arrows being made on the plug and stem so that the. plug can be replaced in the correct position. The plug b may be provided with a cork ring to make good contact with the bowl, a gripping-flange b<4> being provided on the plug b. The portion b<1> may be attached by adhesive to a cork foundation.
Patent GB-1575450-A (GB)
Title: Process and composition for accelerating the setting of portland cement compositions
IPC: C04B28/04
Filed: 1977-02-23
Abstract: The hardening time of Portland cement masses is shortened by addition of an  alpha -hydroxycarbonyl compound. Together with the  alpha -hydroxycarbonyl compound or water-soluble salts thereof, a water-soluble carbonate is added.
Patent GB-939536-A (GB)
Title: Improvements in and relating to collapsible packing cases or like containers
Inventor: BILLS HENRY
IPC: B65D6/18
Filed: 1961-03-03
Abstract: 939,536. Crates. BONALLACK & SONS Ltd. March 5, 1962 [March 3, 1961], No. 7811/61. Class 18. [Also in Group XXX] A collapsible crate has sides 5, 6, 7, 8 foldable inwards on to a base 4, and a lid (not shown) which will wholly enclose the crate when in its collapsed condition, the sides being attached to the base by hinges set at progressively different heights above the base. Side 6 is hinged to the upper edge of a further hinged member 6b attached to the base to form a loading ramp, and has inwardly foldable supporting feet 14. Three transverse rails 10 provide feet raising the crate for access of a fork lift truck, and the ends of the rails have lifting eyelets 11. Means 12 secure the lid to the case when it is collapsed. A tie rod 13 retains the side walls 7, 8 in position while the wall 6 is being used as a ramp. Air vents 19 are provided.
Patent GB-146066-A (GB)
Title: Improvements in or relating to hermetic closures for receptacles of all kinds
IPC: B65D41/16
Filed: 1920-03-17
Abstract: 146,066. Colombani, C., and Liarsou, J. B. M. Aug. 21, 1919, [Convention date]. Lids, hermetic; lids, connexions to prevent loss of.-A cover or capsule for a receptacle consists of a cap 1 of non-resilient material with an inwardly-extending bevel-shaped mouth 3 which is slightly smaller than a projecting rim 6 of halfround shape at the mouth of the receptacle, the rim being formed with two diametrically-opposite flats 7, 8 so that the capsule can be applied or removed by rocking it about the diameter joining the flats. A disk or ring 4 of india-rubber, leather, cork, &c. is fitted inside the cap. The capsule may be connected to the receptacle by a wire 10 connected to a ring 11 in a channel 13 in the neck of the receptacle below the rim 6. Part 12 of the ring 11 is formed as a spring to allow the ring to be sprung over the rim 6. The flats 7, 8 may be formed on the mouth of the capsule instead of on the rim of the receptacle.
Patent GB-1066242-A (GB)
Title: Improvements in or relating to the extraction of metal values
Inventor: FLETCHER ARCHIBALD WILLIAM
IPC: C22B3/32
Filed: 1963-02-27
Abstract: Naphthenates of metals which are less basic than an alkaline earth metal, which term includes magnesium, are prepared by contacting an aqueous medium containing at least one such metal value with a solution of an alkaline earth metal naphthenate in an inert solvent which is substantially immiscible with the aqueous medium.  The solvent may be an aromatic hydrocarbon or a mixture of an aliphatic hydrocarbon with up to 10% of an aromatic hydrocarbon.  The alkaline earth metal naphthenate may be prepared as described in Specification 915,428.  Preferably magnesium oxide dissolved in ammonium chloride solution is used in the preparation of magnesium naphthenate. Alternatively, the alkaline earth metal naphthenate is prepared by double decomposition of an alkaline earth metal salt with sodium naphthenate and extracting the alkaline earth metal naphthenate into the inert solvent. The metal forming the relatively more stable naphthenate may be selectively extracted from a mixture by using the amount of alkaline earth metal naphthenate equivalent thereto, e.g. copper may be separated from cobalt, nickel, cadmium, lead, zinc and/or tin. In a continuous process, the naphthenic acid remaining in the organic phase when the metal naphthenate extract is treated with mineral acid solution to recover the metal values (see Division C1) is treated with fresh alkaline earth metal base to reform the alkaline earth metal naphthenate.ALSO:Metal values are extracted from an aqueous medium containing at least one such value, the metal being less basic than an alkaline earth metal, by contacting the aqueous medium with a solution of an alkaline earth metal naphthenate in an inert solvent which is substantially immiscible with the aqueous medium. The term alkaline earth metal includes magnesium. The solvent may be an aromatic hydrocarbon or a mixture of an aliphatic hydrocarbon with up to 10% of an aromatic hydrocarbon, e.g. kerosene. The metal forming the relatively more stable naphthenate may be selectively extracted from a mixture of metal values by using the stoichiometric amount of alkaline earth metal naphthenate, and the method may be used to separate copper from cobalt, nickel, cadmium, lead, zinc and/or tin. Copper and nickel may be extracted separately by extracting first the copper values using the stoichiometric amount of naphthenate corresponding thereto and secondly using naphthenate equivalent to the nickel values.  The metal naphthenate extract may be treated with a mineral acid solution to recover the metal values in the aqueous phase, and the organic phase containing naphthenic acid recycled to prepare more alkaline earth metal naphthenate (see Division C2).
Patent GB-358856-A (GB)
Title: Improvements in artificial leather and its process of manufacture
IPC: C08L5/14
Filed: 1931-03-14
Abstract: A plastic composition for the manufacture of artificial leather contains a fibrous base such as powdered cotton, and koniaku (a starchy substance).  Softeners such as glycerin or starch syrup may be added, also substances such as tannin which render the product insoluble.