baber/WOPTO huggingface dataset:
Patent GB-752514-A (GB)
Title: Improvements in polymerization of styrene in hevea latex
IPC: C08F253/00
Filed: 1954-06-28
Abstract: Hevea rubber latex and styrene or o-, p- or m-methyl styrenes are polymerized to give a product in which the maximum amount of the polymerized styrene is chemically combined with the rubber by subjecting to polymerizing conditions 5 to 60 parts by weight of styrene per 100 parts of rubber content of the latex, 0.2 to 2 parts of a catalyst, e.g. a water soluble peroxygen catalyst such as sodium, potassium or ammonium persulphate, an organic hydroperoxide or an azo catalyst such as alpha,alpha1-azobis-isobutyronitrile, and up to 2 parts of alkali-metal hydroxide, e.g. sodium or potassium hydroxide, the water content being 28 to 45 per cent by weight of the mixture, and the surface tension of the mixture of all the ingredients except the styrene being at least 32 dynes per centimetre.  Where an organic hydroperoxide catalyst is used the reaction may be accelerated by adding an alkylene 1,2-polyamine, e.g. cumene hydroperoxide with ethylene diamine, or a reducing agent. Polymerization is effected in a sealed vessel and preferably under an inert atmosphere, e.g. nitrogen.  Sponge products may be made by whipping the copolymer latex containing potassium oleate, zinc oxide, sulphur, the zinc salt of benzothiazolethione, and zinc diethyldithiocarbamate to a froth to which 6 parts of a 50 per cent aqueous slurry of sodium silicofluoride is added, and moulding and vulcanizing.ALSO:Hevea rubber latex and styrene are polymerized to give a product in which the maximum amount of the polymerized styrene is chemically combined with the rubber by subjecting to polymerizing conditions 5 to 60 parts by weight of styrene per 100 parts of rubber content of the latex, 0.2 to 2 parts of a catalyst, e.g. a water soluble peroxygen catalyst such as sodium, potassium or ammonium salt of persulfuric acid an organic hydroperoxide or an azo catalyst such as alpha, alpha1-azobisisobutyronitrile, and up to 2 parts of alkalimetal hydroxide, e.g. sodium or potassium hydroxide, the water content being 28 to 45 per cent by weight of the mixture and the surface tension of the mixture of all the ingredients except the styrene being at least 32 dynes per centimetre.  Where an organic hydroperoxide catalyst is used the reaction may be accelerated by adding an alkylene 1, 2-polyamine, e.g. cumene hydroperoxide with ethylene diamine, or a reducing agent.  Polymerization takes place in a sealed vessel and preferably under an inert atmosphere, e.g. nitrogen.  Several examples of the process are described in detail. The product is very suitable for foaming, e.g. (parts by weight):-rubber component of latex 100, potassium oleate 2.8, zinc oxide 5.0, sulphur 1.5, zinc salt of benzothiayolethione 1.25, and zinc diethyldithiocarbamate 0.65 are whipped to a froth to which 6 parts of a 50 per cent aqueous slurry of sodium silicofluoride is added.  A rubber mix using the latex prepared according to the invention may comprise (parts by weight): -rubber component of latex 100, stearic acid 3, zinc oxide 5, accelerator 0.8, sulphur 2, antioxidant 21.
Patent GB-1384787-A (GB)
Title: Control of a flat knitting machine
IPC: D04B7/02
Filed: 1972-04-24
Abstract: 1384787 Knitting-machines EDOUARD DUBIED & CIE (SA) 24 April 1972 [26 April 1971] 18942/72 Heading D1C A flat machine with variable carriage traverse depending on the knitting programme includes a compensator for compensating for the distance between the reversal point and a fixed programme transmitting selector. Changes in the carriage 13 are initiated by selection boxes 14 via levers 9. Each end of the carriage carries a compensator 2 of a length R which is half the difference 'between the maximum travel and the actual travel L'. The compensators may be mounted on the levers 9. A traverse of a different length requires a different compensator.
Patent GB-889954-A (GB)
Title: Improvements in transmission units comprising an eddy-current coupling
IPC: H02K7/10
Filed: 1958-06-13
Abstract: 889,954. Driving dynamos; automatic speed-control systems for transmitting mechanical power. PRECISION MECANIQUE LABINAL. June 13, 1958 [June 19, 1957], No. 19055/58. Classes 35 and 38 (4). The shaft 4 of an alternator 5, 6 is driven at constant speed from a variable-speed shaft 1, e.g. on aircraft, by means of an eddy-current coupling 2, 3, excited in dependence on the alternator output frequency, and in addition, a change-speed gear 7 is brought into operation by a speed-responsive switch 13 to accommodate large changes of input speed. The eddycurrent driving member 2 of the coupling is mounted on a shaft 1 1  driven by the gearing, and consists of a soft iron drum provided with cooling fins 8 and copper rings giving a flat torque-speed characteristic. Starting of the unit is provided by a friction clutch having centrifugally-released shoes 22 carried by the clutch field member 3. The change-speed gearing is controlled by an electromagnet 20 and clutch 16 energized at low input speeds to lock the planet carrier 14 of the gearing against a fixed member 17 to produce a speed increase of 1 : 2. At higher input speeds the electromagnet is de-energized so that the clutch member 16 engages a surface 18 rotating with the shaft 1 1  to give a straight-through drive. Three speeds may be provided if desired. The speed responsive switch 13 may, among other things, be centrifugal, but in a preferred form it comprises an inductor generator (Fig. 2) feeding a relay circuit. The generator comprises a toothed rotor 23 and a stator excited by magnets 24, 25 and carrying armature coils 26, 27. The generated current is fed to a highpass filter 34 (Fig. 4), which only permits current to flow to operate relay 37 when the speed is above a predetermined value. Current for the clutch magnet 20, for exciting the coupling 2, 3, and the alternator itself, is derived from the alternator. Slip-rings 31, 32, 33 on the hollow shaft 4 common to the coupling and alternator, serve to carry excitation current to the coupling field winding 9 through a frequency and load-responsive regulator 29 which is preferably of the construction described in Specification 853,977, and also to the alternator field member 5 through a voltage regulator 30. Current for the electromagnet 20 is supplied through transformer 35 and rectifier 36. If desired, the rectifier 36 and relay 37 may be replaced by a three-phase self-saturated magnetic amplifier. The alternator may be water-cooled.
Patent GB-314341-A (GB)
Title: Improvements in electron discharge tubes, and insulating means therefor
IPC: H01J35/16
Filed: 1929-06-21
Abstract: 314,341. British Thomson-Houston Co., Ltd., (Assignees of Wantz, J. B.). June 25, 1928, [Convention date]. R÷ntgen-ray tubes; vacuum tubes.-An electron discharge tube has a jacket formed integral therewith and adapted to be filled with insulating liquid. The jacket contains means for compensating for liquid expansion. In Fig. 1, 14 is an X-ray tube having a jacket 18 sealed to it at 19, 20, and at the X-ray window 17. The insulating compartment thus formed is filled with oil through a cap 33 and has an inner chamber 30 in which a quantity of air is trapped to form a cushion for taking up the expansion of the oil. Alternatively the envelope may be cylindrical in form and have a threaded glass extension into which a plug with a compressible part for taking up the oil expansion may be inserted to close the jacket.
Patent GB-656397-A (GB)
Title: Improvements in or relating to the coating of organic plastic material with metal
IPC: C23C18/28
Filed: 1947-07-17
Abstract: Organic plastic materials (e.g. phenolic &c. resins, acrylic, styrene, vinyl and cellulose plastics, waxes, rubber) are treated prior to metallising (silvering) with an aqueous solution of stannous chloride containing sufficient hydrochloric acid to render and maintain the solution clear during treatment, the preferred solution being:- Stannous chloride-360 gm., Hydrochloric acid (sp. grav. 1.2)-216 cc., Water-4000 cc.  The organic material may first be depolished by e.g. abrading or by the use of a chemical depolisher such as acetone, trichlorethylene, nitric acid, ethylene chlorhydrin, or-in the case of cellulose plastics-caustic alkali.  Silver may be deposited by reduction of ammoniacal silver nitrate solution, and the silver layer may be subsequently electroplated with any metal to form a layer which, if desired, may be peeled off.  The Specification as open to inspection under Sect. 91 comprises also the use of the following pre-treating solutions:-(a) stannous chloride 10-1000 gm., hydrochloric acid (sp. grav. 1.20) 216 ccm., water 4000 ccm., (b) stannous chloride 36 gm., hydrochloric acid (sp. grav. 1.20) 43 ccm., water 4000 ccm.  This subject-matter does not appear in the Specification as accepted.  Reference has been directed by the Comptroller to Specification 296,459, [Class 82(ii)].
Patent GB-534614-A (GB)
Title: Improvements relating to coating wire with zinc
IPC: C23C2/02
Filed: 1939-07-01
Abstract: 534,614. Cleaning and coating metals. JOHNSON & NEPHEW, Ltd., R., and ROBINSON, W. July 1, 1939, No. 19226. [Class 82 (ii)] [Also in Group XXXVI] In the production of galvanized ferrous wire or wire rod, the latter is subjected to intense and continuous bombardment from all sides by high-velocity metallic or non-metallic particles which not only clean the wire surface but physically alter the latter by hardening so that there is obtained a tight and effective bond between the wire and the zinc coating subsequently applied by hot dipping or electroplating.
Patent GB-817564-A (GB)
Title: 10-(4-n-leucauramine-benzoyl)-3,7-bis-(dimethylamino)-phenothiazine
Inventor: FRANCIS FREDERICK GEORGE
IPC: B41M5/136
Filed: 1957-06-19
Abstract: The invention comprises 10-(4-N-leucauramine - benzoyl) - 3 : 7 - bis - (dimethylamino)-phenothiazine of the formula <FORM:0817564/IV (c)/1> and a method for making it by condensing Michlers hydrol (4 : 41-bis-(dimethylamino)-diphenylcarbinol) with 10 - (4 - aminobenzoyl) - 3 : 7 - bis - (dimethylamino) - phenothiazine of the formula <FORM:0817564/IV (c)/2> in boiling aqueous methanol.  An example is given.  The substance is used in a coating for colourless transfer sheet material and turns blue on contact with acidic material.  The Provisional Specification states that 10-(4-amino - benzoyl) - 3 : 7 - bis - (dimethylamino)-phenothiazine may be made by nitrating benzoyl - leuco - methylene blue, separating p-nitro derivative and reducing it to the corresponding amine.
Patent GB-638850-A (GB)
Title: Improvements in or relating to alkaline batteries
IPC: H01R11/28
Filed: 1948-07-19
Abstract: 638,850. Batteries ; couplings. ACCUMULATOREN FABRIEK VARTA N. V. July 19, 1948, No. 19342. Convention date, July 17, 1947. [Classes 38 (i) and 53] The lid 2 of an alkaline accumulator is formed with an upstanding tubular portion 2<1> which. surrounds the terminal lug 4. A conductor 7 is connected to the terminal 4<1> by a member 8 having a conical recess at the lower end which fits the terminal. The member 8 and a part of the conductor 7 are coated with insulation 9. Liquid is prevented from penetrating to the joint between the terminal 4<1> and member 8 by a slotted ring 11 and a packing ring 12 which are pressed against the member 8 and the tubular portion 2<1> by a screw cap 10 which engages threads on the exterior of the part 2<1>. Ridges or knobs 12<1> may be provided on the container to separate adjacent cells when they are supported on a frame made of rubber coated steel bars. Instead of the knobs 12<1> loose spacing members may be employed. The frame may be provided with guards to protect the cells.
Patent GB-1032612-A (GB)
Title: Improvements in or relating to lamps
Inventor: HEFFORD CHARLES GEORGE
IPC: F21V11/00
Filed: 1963-05-15
Abstract: 1,032,612. Screening devices in lamps. STADIUM Ltd. Aug. 14, 1964 [May 15, 1963], No. 19345/63. Heading F4R. A lamp especially for vehicles comprises a parabolic reflector, a plurality of thin non- reflective radial slats extending forward from the surface of the reflector and a plurality of thin spaced non-reflective non-radial slats parallel to the optical axis, the inner edges of the latter slats being disposed on a surface formed by joining the focal point of the reflector to the periphery of the reflector surface. Fig. 3 shows one form of construction of the device consisting of ring-shaped slats 2 secured at their ends to a radial plate 4 and supported also by a radial plate 8. The plate 4 may be secured to the reflector of the lamp by tongues 9, a second similar plate 4 and system of rings being added to fill the aperture of the reflector.
Patent GB-578757-A (GB)
Title: Improvements in or relating to the drying of paints and the like by electric high frequency heating
IPC: F26B3/34
Filed: 1943-11-19
Abstract: 578,757. Electric induction heating. STANDARD TELEPHONES & CABLES, Ltd., and MADDOCK, A. J. Nov. 19, 1943, No. 19382. [Class 39 (iii)] A sheet S covered with paint, enamel, varnish or like material is moved below an electrode C and a high frequency generator is connected to S and C, whereby the coating is heated and dried and/or stoved. If both sides are coated, a second electrode is arranged below the sheet and connected in parallel with the electrode C. If the sheet is non-metallic, electrodes are arranged on both sides, and connected to the generator, the sheet itself also being heated. For a non-uniform shape such as a motor car body, the electrode may conform to the contour, or a comparatively small electrode may be moved relatively to it. An internally coated object may be dried by an electrode inserted into it. The heating of the coating may be graded by varying the intensity of the field by varying the distance between the sheet and the electrode as described in Specification 577,208.
Patent GB-498886-A (GB)
Title: Lathes for machining work-pieces of non-circular section
IPC: B23Q35/08
Filed: 1937-07-14
Abstract: 498,886. Lathes. HERBERT, Ltd., A., LLOYD, A. H., and LONG, L. L. July 14, 1937, No. 19472. [Class 83 (iii)] A copying attachment for a lathe &c., has a stylus or equivalent means for engaging a model rotated in unison with the workpiece, the stylus &c., being rigidly connected with a tool and supported for reciprocal movement dependent upon the contour of the model by resilient means supported from a slide which can be fed to carry the stylus and tool along the workpiece. The base 15, Fig. 1, of the attachment is mounted for transverse adjustment on a slidable support 13. Integral with the base 15 is an upright 16 cut away to form a horizontal U-shape, at the opposite end of the base a second upright 17 of I-shape is secured by a flat spring-plate 18. Four parallel flat springs 19 bridge these uprights and connected near their mid-points is a bracket 20 carrying towards one side a support 21 for the stylus 22 and towards the other side a support 23 for the tool 24 which may be a diamond. Provision is made for withdrawing the tool and stylus at the end of a working movement and comprises an arm 25 integral with the bracket 20 which is engaged by a cam-piece 26 pivotally carried by the base and urged out of engagement with the arm. 25 by a spring 27 ; a roller 29 attached to the cam-piece comes into engagement with stops 29a, 29b, carried by a station. ary bar, at the stroke ends to alternately withdraw and release the tool. A rod 28 is connected through a link to the cam for rotating it and withdrawing &c. the tool by hand.
Patent GB-798909-A (GB)
Title: Improved process for manufacturing effect yarns from linear polycondensation products
IPC: D02J1/22
Filed: 1956-06-26
Abstract: 798,909. Stretching and twisting yams. NAAMLOOZE VENNOOTSCHAP ONDERZOEKINGSINSTITUUT RESEARCH. June 26, 1956 [July 19, 1955], No. 19795/56. Class 120(3) An "effect" yarn is produced on a stretching and ring twisting machine by con tinuously stretching a monofilament of a linear polycondensation product e.g. a polyamide, polyester, or polyurethane, immediately submitting it to a dry heating, and winding on the twisting spindle: the collected monofil is subsequently further twisted to form a twist-lively yarn. The monofil may be heated by passage through a tubular member the internal diameter of which may not exceed 1 m.m. As shown, a monofil 2 passes over a thread brake 1 and through a guide 6 which is so positioned as to ensure that the monofil is in contact over an angle of more than 180 degrees with the resilient surface of a pressure roller 4 mounted in swing arms 5 and frictionally driven by a roller 3. The monofil emerging from the nip of the rollers 3, 4, passes over stretching rods 7, effects several spaced turns around a stretching roller 8 coacting with a guide roller 9, thence over a guide roller 10. through an insulated electrically heated (135‹C.-155‹C.) tube and is guided by rollers 14 and 15 and a guide 16 to a spindle 17 on which it is wound. The yarn thus produced is divided into two separately spooled yarns to which further twists e.g. to a final twist of 450 turns per inch, are applied in opposite directions.
Patent GB-854777-A (GB)
Title: Improvements in and relating to gas-blast electric circuit-breakers
Inventor: LOVE KENNETH GEORGE
IPC: H01H33/14
Filed: 1958-06-20
Abstract: 854,777. Gas-blast switches. ENGLISH ELECTRIC CO. Ltd. June 15, 1959 [June 20, 1958], No. 19805/58. Class 38 (5). An air-blast circuit-breaker comprises a cylindrical metal air receiver 10 mounted on insulating supports 11, 13 and carrying diagonally-staggered, series-connected, horizontallyopposed pairs of interrupter units 12, whose end terminals 18 are connected to the receiver 10 through capacitive impedance elements 19 to improve the voltage division between the interrupters 12 during switching and opencircuit conditions. The centre point 15a of the interrupter chain is connected to the receiver 10 by a metal support 14a, and the other supports 14 are insulating members, each support containing blast valves simultaneously operated together with the interrupter movable contacts, by control means passing through the support 11. The supports 13 may be replaced by post-type current or voltage transformers.
Patent GB-1157722-A (GB)
Title: Transistor Deflection Control Circuit for Television Equipment
IPC: H04N3/16
Filed: 1966-05-04
Abstract: 1,157,722. Transistor sawtooth circuits. RADIO CORPORATION OF AMERICA. 4 May, 1966 [14 May, 1965], No. 19809/66. Heading H3T. The subject-matter of this Specification is substantially the same as that described in Specification 1,157,721, but the claims are concerned with a transistor vertical deflection circuit for a television receiver having a feedback path via a capacitor and including means to prevent spurious oscillation.
Patent GB-499033-A (GB)
Title: Selecting and printing apparatus for use in telegraph circuits
IPC: H04L17/16
Filed: 1937-07-16
Abstract: 499,033. Electromagnets. KLEINSCHMIDT, E. E. July 16, 1937, No. 19810. Convention date, Aug. 13, 1936. [Class 35] [Also in Group XL] A magnet 65 in a printing- telegraph receiver has a U- shaped laminated core 175 with a pair of U-shaped magnetic members 178 secured to each pole face to increase the poleface area and hold the coils 176 in place.
Patent GB-404042-A (GB)
Title: Improvements in or relating to film carriers for motion picture apparatus
IPC: G03B17/26
Filed: 1932-07-13
Abstract: 404,042. Kinematograph apparatus. COMMUNITY SERVICE, Ltd., 1, Montague Street, London.-(Assignees of Foster, W. D.; 4, Wilsey Square, Ridgewood, New Jersey, U.S.A.). July 13, 1932, No. 19844. Convention date, July 14, 1931. [Class 97 (i).] In a film magazine the film tension is controlled by one or more springy or spring-urged members mounted on the magazine adjacent the film opening or openings, and engaging the film at such opening; the members may form part of the wall of the magazine. As shown in Fig. 1, film containers 2 having plates 5 connected by a hinge 6 are provided with curved plates 12 slidably mounted outside the containers, the plates 12 being urged by springs 17 so that their curved ends 13 engage the film passing through openings 8. The plates 12 may be resilient, and the ends 13 may be enclosed in velvet or the like, so that, when the containers are folded together about the hinge, a completely lighttight enclosure of the film is obtained. Fig. 7 shows a magazine for a single coil of film, in which a member 49 having a curved end 52 extending inwardly is housed between the wall of the magazine and a guide member 50, and is pressed by a spring 51 against a curved socket piece 53 at the opposite side of the film opening. The magazine has a radially extending side plate 45 and lugs 54 which assist in locating the magazine in the apparatus. Constructions of single-chamber magazines for two spools having a recess between the film openings are described ; in each construction the wall between the film openings is resilient, and is formed with rolled ends at the openings, the rolls extending inwards in one case and outwards in the other. Specifications 188,681 and 255,496, [both in Class 97 (i), Optical systems &c.], are referred to.
Patent GB-998908-A (GB)
Title: Improvements in and relating to the testing of closed, gas-filled containers
IPC: G01M3/20
Filed: 1964-05-13
Abstract: 998, 908. Testing for leaks. BALZERS PATENT- and LIZANZ-ANSTALK. May 13, 1964 [June 6, 1963], No. 19884/64. Heading G1S. In an apparatus for detecting leakages in gasfilled hollow containers 7, there is provided a measuring chamber 1, a pressure detector 4, valves 2, 3, vacuum pump 6 and gas conducting pipes 9, 10. In operation, the chamber 7 is evaluated to a pressure exceeding a predetermined magnitude say, after a time t, and after a time t 2  the pressure is measured by detector means 4. The results are plotted graphically as shown in Fig. 2, graph 14 showing that of a leak-free container and the graphs 15-18 relating to containers which leak by varying accounts.
Patent GB-767267-A (GB)
Title: An improved goggle valve
Inventor: HOOKHAM GEORGE
IPC: F16K3/10
Filed: 1954-07-07
Abstract: 767,267. Valves. MILES & PARTNERS (LONDON), Ltd., J. July 6, 1955 [July 7, 1954], No. 19949/54. Class 135. In a goggle valve controlling the flow of fluid through large diameter conduits, comprising longitudinally spaced pipes 12, 13 between which are disposed a pressure-ring 21, an annular expansion bellows 23 and a goggle plate 26 transversely movable between seats 25, 24 on the pipe 13 and the ring 21, a plurality of tie-bars 14, three shown, are fixed to radial arms 20, 17 on the pipes and slidable in boxes 29B secured to radial arms 22 on the ring. Springs 29 abutting boxes 29A adjustably mounted on the bars 14 urge the boxes 29B and the ring 21 rightwardly to clamp the plate 26 between the seats. To unclamp the seats from the plate, hydraulic rams 30 connected by yokes 31, Fig. 3, to the boxes 29B move the ring leftwardly. - Specification 728,890 is referred to in the Provisional Specification.