baber/WOPTO huggingface dataset:
Patent GB-487890-A (GB)
Title: Improvements in and relating to electromagnetically operated vehicle direction indicators
IPC: B60Q1/36
Filed: 1937-01-14
Abstract: 487,890. Road-traffic signals on vehicles. EVANS, C. J., and EVANS, S. C. Jan. 14, 1937, No. 1090. [Class 118 (ii)] An electromagnetically operated direction-indicator comprises a core moved in either direction by a solenoid and adapted at the end of its travel to break the operating circuit and to be mechanically locked. In the form shown in Figs. 1 and 2, upon a solenoid 17 being energized, core 18 is displaced downwardly, causing the arm 23 to rotate the indicating arm 13 into its signalling position. As the core reaches its extreme position, a projection 35 causes the contacts 31, 32 in the circuit of the solenoid 17 to separate, the core being retained in the operating position by a ball 38 and spring 41 engaging a recess 39. In order to restore the arm, the upper solenoid 20 is energized, lifting the core 21, the projection 35 breaking the circuit of solenoid 20 at the contacts 33, 34 and the locking means passing into recess 40. In a modification, Fig. 7, the arms 23, 13 are returned by a spring 52, the arm 13 being displaced into its signalling position as before, but the solenoid 20 is arranged to withdraw the core 21 pivoted to a catch 49 which is urged by the spring 55 to engage in the notch 50 when the arm 13 is in its operating position to allow the arm to return to its normal position. Other switch contacts similar to 31, 32 may be arranged so that the arm 13 takes up intermediate positions, additional recesses being arranged so that the arm is held in these positions. Switches arranged similarly to 31, 32 may operate other signalling apparatus on the vehicle and the arm may be slidably mounted.
Patent GB-624125-A (GB)
Title: Improvements in or relating to continuous crystallisation
IPC: B01D9/00
Filed: 1947-01-13
Abstract: <PICT:0624125/III/1> <PICT:0624125/III/2> <PICT:0624125/III/3> In a continuous crystallization, the suspension of crystals and mother liquor is passed upwards through a vessel having two or more constrictions disposed successively along the path of the ascending current, and the crystals which have grown to the desired size are removed from the bottom of the vessel.  In the vessel shown in Fig. 2, the constrictions are obtained by truncated cones e, and each constriction has associated with it a deflecting cone f.  In preferred forms the diameter of the vessel increases, and the constrictions have apertures of progressively increasing size, in the direction of flow of the suspension as shown in Figs. 3 and 4.  When crystallization arises from chemical reaction between two solutions, one of the solutions is passed upwards and the other is injected at suitable points in the apparatus, e.g. the centres of the apertures as shown by inlet tubes i in Fig. 3.
Patent GB-1471791-A (GB)
Title: Preparation of olefin oligomer
IPC: B01J31/00
Filed: 1975-01-10
Abstract: 1471791 Oligomerizing olefins LION FAT & OIL CO Ltd 10 Jan 1975 [29 Jan 1974] 1108/7@ Heading C5E [Also in Division C3] Oligomers of C 6+  olefins are obtained by polymerization in the presence of a mixture of an aluminium halide and a derivative of a polyhydric alcohol wherein the hydroxyl groups are all esterified or partially esterified and partially etherified, the mol ratio of aluminium halide to total ester and ether linkages being 0À8-1À2 : 1. A solvent may be present. Preferred polyol derivatives are diacetates of ethylene, propylene or butylene glycol; or ethoxyethyl, butoxypropyl or ethoxyethoxyethyl acetate. The product is hydrogenated. Examples describe the oligomerization of octene-1 and of dodecene-1.
Patent GB-300427-A (GB)
Title: Improvements in or relating to leggings and like articles of clothing
IPC: A41D17/02
Filed: 1928-01-13
Abstract: 300,427. Matz, H. P., Matz, A., and Matz, H., (trading as Matz & Sons, D.). Jan. 13 1928. Leggings.-A legging a has a side opening b a: the edges of which are arranged flexible stiffeners e, e<1>, the former of which is riveted and the latter pivoted to a bridge-piece f. The edges of the opening are held together by a hook-shaped fastener h co-operating with a loop j. A gusset piece c covering the opening is secured at the edges by stitching or cement so as to form pockets enclosing the stiffeners. A piece of material k is cemented over the upper end of the gusset piece. In a modlification, the stiffeners are hinged together by a rule joint, and the fastening h, j is replaced by a press fastening. The gusset-piece may be omitted, separate pockets then being provided for the stiffeners.
Patent GB-186278-A (GB)
Title: Improvements in protectors for the soles and heels of boots and shoes
IPC: A43C13/04
Filed: 1922-01-14
Abstract: 186,278. Newman, G. Jan. 14, 1922. Protectors, construction of.-An improved plate for holding flanged rubber or other studs to the soles and the flanges of the heels of boots and shoes has depressions h as shown round the holes to house the flanges of the studs.
Patent GB-252415-A (GB)
Title: Improvements in and relating to apparatus for moulding and vulcanising pneumatic tyre covers and the like
IPC: B29D30/06
Filed: 1925-01-15
Abstract: 252,415. Dunlop Rubber Co., Ltd., Macbeth, C., and Mitton, J. Jan. 15, 1925. Moulding wheel tyres; mould opening-devices.-Relates to tyre moulding and vulcanizing apparatus of the type comprising a pair of horizontal steam chests embracing a divisible mould, one chest being hinged to the other, and consists in the provision of means to ensure automatically the separation of the tyre from the mould upon opening the apparatus. As shown, a lower chest 1 rigid with a base 3 is connected by a hinge 4 to a movable upper part 2 balanced by an adjustable weight 23, the chests being formed with cavities 5 each embracing one-half of a divided mould 6. In the closed position a spring latch 12 on the chest 2 engages a catch 14 on the chest 1 and the parts are clamped together by swivel bolts 7. The tyre cover is carried by a clip ring 25 having a projecting inner portion 26 adapted to seat on a flange 27 on a carrier ring 28 which normally rests upon the lower chest but is raised, as the upper chest 2 is opened, through levers 43, 39 and links 41, 29. The ring 28 slides on fixed posts 30<a> against which abut horizontal bolts projecting through the ring 28 above the clip ring, the bolts being drawn inwardly by springs 35. The ring 28 rises more slowly than the chest 2 and, at first, the horizontal bolts overlie the clip ring, causing detachment of the tyre from the upper mould shell. At the completion nf the upward movement the bolts withdraw inwardly over inclines 31, 32, leaving the tyre free for removal. To start the opening of the mould, the upper chest is forced away from the lower by a pointed, inclined screw 16 which also disengages the catch 12. The screw is operated by a nut 21 turned through gearing 17 - - 20. The tyre is supported by the usual air-bag 49 having an inlet valve 50 connected by flexible piping 51 to the air supply. To ensure correct alignment with the valve 50 the tube is provided with an extension 52a sliding through a pin trunnioned in bearings carried by a plate 53 spanning the ring 28 and connected to the valve 50 by a connection 56. According to the Provisional Specification, the screw for separating the chests is carried by the upper one; also the chests may be separated by lifting-tackle or prized apart by a crowbar.
Patent GB-546390-A (GB)
Title: Improvements in electric resistance welding apparatus
IPC: B23K11/04
Filed: 1941-01-31
Abstract: 546,390. Welding. BRITISH INSULATED CABLES, Ltd., and WILSON, L. B. Jan. 31, 1941, No. 1282. [Class 83 (iv)] In an electric butt, welding machine the means for adjusting the initial gap between the two work clamps and the means for adjusting the value of the upsetting pressure to suit a change in a characteristic of the work pieces such as size or composition are so interlinked that the making of one adjustment automatically effects the other adjustment. The adjustments, which may be effected simultaneously by the action of a single control member, may include also a switch for transformer tappings to give the correct strength of current and the adjustment of the point at which the welding current is cut off. The fixed movable work holders 4, 5 are mounted in slots in the casing 1 and each is provided with a fixed jaw 12 and a movable jaw 13 which is held closed by a spring 15 and is opened by a pedal operated lever 18 engaging a lug 21 on the jaw. The jaw 12 has a travelling contact block 22 and the jaw 13 has grooves 23 across the width of its block. The work holder 5 is pressed forwardly by a spring 34 to effect welding and is retracted by the engagement with a pin 45 thereon of a crank 44 carried by a pedal-operated shaft 42. It is held in its rest position by a catch 36 on a spring-pressed switch lever 38. The control shaft 50 which is provided with a cam drum 59 and helical cams 52, 53, 54, is furnished also with a graduated dial 56 co-operating with a pointer 57, the dial being graduated according to cross-section of wire &c. or composition thereof. The drum 59 has a number of circumferentially offset cams 60 each of which engages one of the switches 58 in one of the tappings of the transformer primary according to the angular position of the shaft. The fixed work holder 4 is adjustable for the initial gap since it is held by a spring 64 in contact with the cam 52. The upset pressure is determined by the cam 53 which engages a plunger 35 held against the rear of the spring 34. The adjustment of the automatic current cut-off is effected by the cam 54 which engages an insulating arm 71 mounted on a vertical pivot 70 and carrying a pair of contacts 68 one of which is engaged by an insulating disc 14 on the knock-off rod 73 carried by the work holder 5. The saddle of this work holder is slidable on ball bearings and its edges may consist of insulating material or the balls may be so made. The welding operation is started by depressing the lever 38 so as to remove the catch 36 from the boss 37 on the work holder and saddle 7 and thereafter connect the welding switch 39.
Patent GB-306024-A (GB)
Title: Device for interrupting the passage of a driving means to a driving apparatus
IPC: H02P7/20
Filed: 1929-01-14
Abstract: 306,024. Soc. Anen. des Ateliers Heuze, Malevez, et Simon RÚunis. Feb. 14, 1928, [Convention date]. Stop-gear. - The power supplied to electrically driven or other machinery is cut off when the synchronism between the machinery and another periodically oscillated device ceases. In the example shown, an electric motor 2 drives a table 10 which may support glass plates moving beneath grinding or polishing tools, the table having a projection at 10a which passes at regular intervals past an arm 7b of a switch 6 mounted on a, block 7 that has a regular oscillating movement about an axis 7a. Should the table get out of synchronism with the block 7, the projection 10a strikes the arm 7b and breaks a circuit from a battery 5 through sliding contacts 7b, 7d and the switch 6 to an electromagnet 4 which thereupon releases its armature 4a and breaks the circuit of the motor 2.
Patent GB-1224472-A (GB)
Title: Flexible sheet materials
Inventor: WHARTON ROGER STEWART
IPC: D06M10/00
Filed: 1967-01-11
Abstract: 1,224,472. Flexible sheet materials. DUNLOP CO. Ltd. 9 Jan., 1968 [11 Jan., 1967], No. 1432/67. Headings B5A and B5B. [Also in Divisions B2 and C3] Flexible sheet materials are made by a method which comprises applying loose fibres normally by sprinkling to a surface of a sheet of an opencellular plastics material in which the majority of the cells are interconnected to form pores which is vibrated to secure distribution of the fibres within the pores, and compressing under conditions of temperature, pressure and time such that it remains in a compressed state when the pressure is removed. The fibres preferably consist at least in part of a thermoplastics fibrous material, e.g. polyesters and polyamides. A mixture of fibres of various materials which may include cotton, wool or rayon may be used. The pressure is normally between 0À5 and 100 lbs./sq. inch and is applied for at least 0À5 second at a temperature between 60‹ and 350‹ C. The open-cellular plastics material may be low or medium density polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyether or polyester polyurethane. Reticular and reticulated foams are preferred as the cellular plastics material. The compressed product may be impregnated with a binder usually of a polymeric composition. Examples are latices of nautral or synthetic elastomers, polyurethane compositions, copolymers of ethylene and vinyl acetate and flexible thermoplastics materials such as polyvinyl chloride. The compressed product may also be coated with a polymeric material such as a polyacrylate or a polyurethane composition. The polyurethane film may be applied by a film transfer technique.
Patent GB-835214-A (GB)
Title: Production of electrical components from metal foils
IPC: H05K1/09
Filed: 1955-01-17
Abstract: 835,214. Electric transducers. EISLER, P. March 21, 1956 [Jan. 17, 1955], No. 1437/55. Class 40 (1). [Also in Groups XI and XXXVI] An electrical resistor designed to function as a temperature or strain gauge and comprising a metal-foil pattern secured to an insulating base is produced from a cupro-nickel foil which has been cold-rolled, thus making the foil anistropic, the resistor pattern being so orientated with respect to the direction of rolling that the principal direction of current flow in the component substantially coincides with the direction of greatest density of atomic population in the crystal structure of the foil. In the arrangement illustrated the direction of rolling OR of the foil is indicated by an arrow 3 marked thereon. A pattern 1 is marked on the foil from which the resistor is to be produced by a method involving printing followed by etching as described in Specifications 639,178 and 690,691, the principal direction of current flow OP being arranged at 45 degrees to the direction OR, this direction being that in which the number of atoms per unit length in the surface is greatest. The foil is secured to an insulating web which is also marked with its direction of minimum temperature coefficient of expansion; this direction is made to coincide with the direction OP. Prior to the preparation of the component, stresses within the foil are relieved by a heat process after which the foil is polished on its exposed surface, e.g. mechanically, chemically or electrochemically, this polishing process also reducing the foil to its desired thickness.
Patent GB-550610-A (GB)
Title: Improvements in or relating to devices for measuring small direct voltages
IPC: G01R19/18
Filed: 1942-02-06
Abstract: 550,610. Measuring voltages. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Feb. 6, 1942, No. 1621. [Class 37] In an arrangement for measuring small D.C. voltages by supplying the voltage to be measured across a condenser the capacity of which is periodically varied and by measuring the amplitude of the re ulting A.C. potential (amplified and rectified, if desired) across the condenser, the latter has flat, parallel plates which are movable with respect to one another in a direction normal to their plane, thus eliminating the drawback of variable contact-potential found in rotating plate condensers. The contact-potential may be made low in the first instance by making the plates of electrolytic red copper, and be neutralized entirely by injecting an equal and opposite voltage into the circuit. The condenser may be housed in a hermetically-sealed envelope in a vacuum or other chemically-inert atmosphere not affecting the contact potential. When using a known D.C. voltage for comparison purposes, equality of voltage is indicated by no A.C. being set up across the condenser.
Patent GB-1214782-A (GB)
Title: Transmission system
IPC: B63H5/125
Filed: 1969-01-10
Abstract: 1,214,782. Outboard drives. CARL HURTH MASCHINENUND ZAHNRADFABRIK. 10 Jan., 1969 [31 Jan., 1968], No. 1642/69. Heading B7V. [Also in Division F2] An apparatus is lubricated by means of lubricant which is supplied from a reservoir through metering means and is returned to the reservoir through means having a higher flow capacity than the metering means. In an embodiment lubricant is supplied to an outboard marine transmission 10 from a reservoir 45 and is gravity-fed through an adjustable throttle 51 to lubricate the gears &c. and to be retained within chambers, such as a steering chamber 40, so as to prevent corrosion when the transmission is not in use. When the transmission is actuated, a pump 56 draws lubricant from a sump 57 and returns it to the reservoir 45, via pipes 58 and 59. Since the quantity of lubricant pumped to the reservoir is greater than the quantity of lubricant leaving the reservoir through the throttle 51, the lubricant-level in the transmission is lower than when the latter is stationary. When the transmission is stopped, the pump is also stopped and lubricant flows from the reservoir 45 into the transmission and thus raises the lubricant level therein. In a modification (not shown), instead of lubricant being gravity-fed to a transmission, it is supplied by means of a pump.
Patent GB-391548-A (GB)
Title: Improvements in and relating to clutch couplings for power transmission purposes, particularly the starting of engines and variable speed ratio transmission
IPC: F16D13/18
Filed: 1932-01-20
Abstract: 391,548. Turning-gear. STUART, TURNER, Ltd. and PLINT, A. F., 43, Market Place, Henley-on-Thames. Jan. 20, 1932, No. 1753. [Class 7 (v).] The invention relates to clutches in which the grip of a shoe, selftightened by toggle action, is relieved by overrunning of the driven member, and the shoe is centrifugally thrown out of action as the speed of the driven member r rises, The clutch is particularly applicable to starters for engines driving lighting and pumping installations, in which the electric starting-motor may require to be recoupled to the engine after a false start. An electric motor (not shown) drives by belt, toothed, or chain gearing a wheel 2 rotatable on the bearing 1 of an engine crank shaft 5, to which is keyed a disc 4. One or more bell-crank levers 8, preferably having weighted ends, are pivoted at 9 to the disc, their shorter arms 7 being connected at 10 to friction shoes 6 bearing, under the pull of springs 12, on a drum 3 integral with the sprocket &c. 2. The arms 7 are so inclined that, on counterclockwise rotation of the drum 3, the shoes are forced into firm engagement until the disc 4 tends to drive, the levers 8 centrifugally lifting the shoes when the engine speed exceeds that of the drum, but returning them into action if the engine slows down. Stops 11 may be provided to limit retraction and prevent tilting of the shoes.
Patent GB-547187-A (GB)
Title: Improvements in or relating to the manufacture of magnetic materials
IPC: H01F1/36
Filed: 1941-02-10
Abstract: 547,187. Magnetic iron oxide. JOHNSON LABORATORIES, Inc., Feb. 10, 1941, No. 1778. Convention date, Feb. 9, 1940. Drawings to Specification. [Class 1 (iii)] [Also in Group XXXV] A magnetic dust core for high frequency inductances is formed from a synthetically produced magnetic oxide of iron (Fe 3 O 4 ) in the form of minute substantially spherical particles. The oxide is produced in this form by melting iron, for example by passing it in the form of a wire through an electric arc or an oxy-acetylene flame, and blowing the molten metal in the form of a spray through an oxidizing gas such as air. The powder is subsequently mixed with synthetic resin, moulded into cores. Specifications 147,901, [Class 82 (ii)], 269,770 [Class 38 (ii)], 415,456, 473,940 [Group II], and U.S.A., Specification 1,695,041 are referred to.
Patent GB-952243-A (GB)
Title: Transistor square-wave oscillator
IPC: H02P23/28
Filed: 1962-01-17
Abstract: 952,243. Control of A.C. motors. SIEMENSSCHUCKERTWERKE A.G. Jan. 17, 1962 [Jan. 17, 1961], No. 1790/62. Heading H2J. [Also in Division H3] The invention relates to an arrangement for generating a rectangular waveform, comprising a pair of transistors 6, 7 operating in push-pull with as common collector circuit the primary 9 of a transformer, and with their bases backcoupled to generate oscillations by means of secondary windings 10, 13 respectively. A resistor 16 between collector and base of transistor 6 provides a bias which ensures that oscillations start while diodes 24, 25 prevent excessive voltage surges being applied to the transistors. The arrangement is fed from an A.C. supply via bridge-connected rectifiers 3 and smoothing capacitors 4, 5. According to the invention the load 19 is also connected across the primary 9 of the transformer, so that the transistor collector current divides, part flowing through the primary winding and part through the load; in this way, as the loading increases the current available to drive the bases of the transistors decreases, causing the frequency of oscillation to increase. The arrangement may be used for supplying an induction motor, being adjusted to give constant speed irrespective of the load on the motor.
Patent GB-1027050-A (GB)
Title: Photographic or cinematographic camera
Inventor: JURENZ ROLF
IPC: G03B13/02
Filed: 1964-01-15
Abstract: 1,027,050. Photographic cameras. PENTACON DRESDEN KAMERA-UND KINOWERKE.V.E.B. Jan.15, 1964, No.1798/64. Headings G2A and G2J. In a camera in which measuring or indicating means within the camera, such as scales, pointers, or image-limit marks, are made visible in the viewfinder, these are illuminated by a bundle of lightconducting fibres. In Fig. 2 the bundle has a common light-admission surface 4 at the top of the camera, and then divides into two bundles 2, 3 passing on each side of a pentaprism 5, their respective exit surfaces being opposite an exposure time setting dial 8 and a light-measuring pointer 9. Dial 8 and pointer 9 are thus illuminated by light passing through the bundle of fibres, and their images are reflected by prisms 10,11, acting with pentaprism 5, into the viewfinder field. In Fig. 4 the light-admission end 13 of the fibre bundle 14 is located in the light-entry grating 15 for the exposure meter, and carries the illumination to a diaphragm scale 16 which is then reflected by prism 18 into the viewfinder 19. Bundle 14 consists of conical fibres, so that the light exit area is smaller than the entry area, and thus has a higher light intensity.
Patent GB-705735-A (GB)
Title: Improvements in the production of viscose
IPC: D01F2/08
Filed: 1952-01-23
Abstract: Cellulose xanthate is dissolved in the undialysed steeping liquor, containing hemicelluloses, resulting from the production of alkali cellulose by steeping cellulose in aqueous caustic soda solutions. The steeping liquor is treated to remove suspended solid constituents, e.g. by sedimentation or centrifuging.  In an example cellulose is alkalized with caustic soda and the resulting alkali cellulose is pressed to obtain the steeping liquor.  Part of this is used, together with fresh caustic soda and water, for alkalizing fresh cellulose.  The remainder is clarified by settling and, after its caustic soda content has been adjusted to about 5 per cent., is used for dissolving cellulose xanthate.
Patent GB-194078-A (GB)
Title: Apparatus for making drop forged steel car wheels
IPC: B21K1/28
Filed: 1922-01-23
Abstract: 194,078. Jernberg, C. R. Jan. 23, 1922. Forging - machines; dies.-A car wheel of the form shown in Fig. 2 is forged in two stages between pairs of co-operating dies, the lower of which is circular and is continuously rotated, the upper being of a width narrower than the diameter of the wheel and reciprocated without angular displacement. The finishing dies are shown in Fig. 8, the lower die F being spring supported in a holder E upon which it is rotated by means of sprocket teeth 4. An annular recess 40 is provided in the lower die to receive flash. The web left at h, Fig. 2, is removed by subsequent machining.