baber/WOPTO huggingface dataset:
Patent GB-980205-A (GB)
Title: Method and apparatus for casting films
IPC: B29C48/08
Filed: 1962-06-01
Abstract: 980,205. Films. AVISUN CORPORATION. June 1, 1962 [Nov. 7, 1961], No. 21269/62. Heading B5B. Transparent films are made by contacting one surface of a shaped stream of molten thermoplastic polymer containing at least one additive material with a moving chill surface to cool the stream rapidly and provide a solid film thereon, exerting a pressure on the exposed surface of the solid film while it remains in contact with the moving chill surface, releasing the pressure from the film and removing the film from the chill surface. In this way accumulation of additive material on the moving chill surface is prevented. Pressure is desirably 900 g.-18 kg., and especially 2 kg.-9 kg., per 25 mm., and may be exerted by a sharp air blast, but preferably by engaging the exposed surface of the film with a non-continuous resilient surface, suitably an endless surface, e.g. a roll 31 having helical grooves of opposite pitch extending from substantially the centre to the ends thereof (Fig. 3) to prevent gases, which may be entrapped between the film and the chill surface from accumulating and distorting the film as it is urged against the chill surface under pressure. In place of helical grooves, circular grooves inclined to the axis of roll 31 may be used. Desirably, a stream of gas under pressure is directed against the exposed surface of the polymer stream along its entire width to urge the same into snug contact with the chill surface. Specified materials include polypropylene containing as an additive 0.075- 0.125% of a fatty acid amide with 6-24 carbon atoms, or a non-ionic fatty condensate, antioxidants or other stabilizers, e.g. dilauryl dithiopropionate, antistatic agents, and pigments. Apparatus as shown comprises an extrusion die 11 having a slot orifice from which a continuous stream of molten material falls on to the drum 15, internally cooled by the passage of cooling liquid through concentric pipes 21, 23 and rotating in the direction of arrow 51. The polymer stream is urged into contact with the drum by a blast of air or other gas from nozzle 27, and the chilled film is urged into intimate contact with the drum surface by pressure roll 31, adjustably supported by pivot arms 33 actuated by hydraulic means 35. Roll 31 may comprise a rigid core and an outer covering 39 of resilient material, e.g. silicone rubber. The arrangement of grooves on the roll permits air and other gases trapped between the drum surface and the film to travel laterally of the roll and escape at the edges of the film. Film is removed at take-off roll 45 and advanced by nip rolls 47, 49 to conventional take-up means, not shown.
Patent GB-567199-A (GB)
Title: Improvements in or relating to electric tumbler switches
IPC: H01H1/58
Filed: 1943-12-20
Abstract: 567,199. Tumbler switches ; switch cases. GOLDENBERG, R. Dec. 20, 1943, No. 21356. [Class 38 (v)] A tumbler switch comprises a barrel-like movable contact m rolling in a curved trackway in the base a and having a central peripheral groove cooperating with both a guide-rib o in the track-way and a flange on the ceramic drive-element p. The inner end of the dolly f engages in a recess in a bearing cap r for the spring q which bears also on a washerlike part s of the element p. When the mechanism has just passed the dead-centre position in both directions, the washer s engages the wall of the base a and causes the element p to tilt thereon until the spring q moves the barrel m to the opposite position. The fixed contacts j are secured solely by the shaped walls of the base, and the switch as a whole is secured to a support by the threaded dolly-pivot sleeve e which the dolly fills in a dustproof manner.
Patent GB-643966-A (GB)
Title: Improvements in mechanism for converting alternating motion into unindirectional rotary motion, particularly for use in cathode ray tubes
IPC: H01J29/00
Filed: 1945-08-22
Abstract: 643,966. Cam mechanism. GENERAL ELECTRIC CO.. Ltd., HILL, R. T. J.. and WHIBLEY. R. H. Aug. 22, 1945, No. 21458. [Class 80(iii)] [Also in Groups XXXV and XL(a)] A rotatable element 14 disposed within a cathode-ray tube has an endless zig-zag groove 17 engaged by a driving element 21 on a reciprocatable member 18. Balking means such as spring tongues, Fig. 2, at the bends of the zig-zag groove 17 cooperate with the element 21 and ensure unidirectional movement of the driven element 14. A pocket 23 at the groove-bends locks the element 14 at the end of each stroke of the member 18. Alternate groove portions between adjacent pockets may be axial. Instead of being cylindrical, as shown the element 14 may be conical or disc shaped. As shown, the mechanism is applied to a cathode ray tube for a television camera provided with a lens 11 and cathode ray tube 12. The image storage plate 13 is fixed co-axially with the element 14 and the member 18 is reciprocated either by solenoids 19, 20 energized alternately, or by a single solenoid and a return spring. Specification 643,961 is referred to.
Patent GB-1493995-A (GB)
Title: Method and apparatus for the assembly of sliding gate valve units for casting ladles
IPC: B22D11/10
Filed: 1975-05-20
Abstract: 1493995 Assembly of sliding gate valve units METACON AG 20 May 1975 [24 May 1974] 21581/75 Heading F4B A sliding gate valve unit 17 for a casting ladle 10 is assembled in a mounting frame 56 under temperature conditions controllable by heating means 53 to ensure the contact pressure between the bed plate 19 and the slide plate 21 is maintained at a desired value under operating conditions. The valve housing 18 is attached by bolts 15<SP>1</SP> and wedges 16<SP>1</SP> to the frame 56 so that the ladle side of the valve housing faces the inside of a box 52 with the heating device 53. With the heating device operating and the valve housing 18 heated to the selected temperature the bed plate 19 is inserted into the valve housing. Mortar is used between the joints and this sets quickly as a result of the heat. The parts 2 land 22 are meanwhile assembled in the slide part 20 with mortar between the joints and heat setting is carried out in a drying oven. From the drying oven and in the heated condition these parts are mounted on the valve housing 18 by means of the lid 24 and the clamping bolts 23. The tightening of the bolts 23 to a selected torque is carried out while all the above parts are at a predetermined temperature. At the same time an hydraulic unit 57 is connected to the slide part 20 and the effectiveness of the pretensioning by the bolts 23 is measured by the force required to move the slide part 20.
Patent GB-1279800-A (GB)
Title: Sealing assembly particularly for stern tubes
IPC: F16J15/00
Filed: 1971-04-19
Abstract: 1279800 Shaft seals WAUKESHA BEARINGS CORP 19 April 1971 [12 Feb 1970] 21589/71 Heading F2B A seal assembly for the forward end of a ship's stern tube comprises an annular casing 17 having an annular pocket 32 for a lip seal 25, a restricted inlet 38 and means 53 for drawing oil from the stern tube through the restricted inlet and pocket to provide an oil pressure in the pocket which is lower than that in the stern tube. The casing 17 is secured to the stern tube by a flange 18 and the lip seal of, for example, rubber or a copolymer of butadiene and acrylonitrile such as Buna N bears on a shaft liner 20. The oil pressure in the stern tube (10), Fig. 1 (not shown), is provided by a head tank (42) and the restricted inlet to the pocket 32 from the stern tube is provided by a floating ring 35 of bronze or plastics which is loosely held by pins 36 in a pocket 33 to create a clearance 38. The lip seal assembly (16) at the aft end of the stern tube is subjected to the head pressure which is maintained at a value slightly in excess of the sea water pressure. The lip seal 29 at the forward end of the stern tube is subjected to the reduced oil pressure provided by the restriction and the pump 53 which continuously returns the oil to the higher pressure oil system of the stern tube.
Patent GB-752727-A (GB)
Title: Improvements in or relating to neutralising circuit arrangements
IPC: H03F1/16
Filed: 1954-07-23
Abstract: 752,727. Frequency-selective amplifying circuits. TELEFUNKEN GES., [formerly TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE.]. July 23, 1954 [Oct. 3, 1953], No. 21611/54. Class 40 (6). In a neutralizing circuit wherein the undesired feedback capacity Cga is eliminated by an inductor Lga, this first tuned circuit is coupled to a second tuned circuit L<SP>1</SP>, C<SP>1</SP> having a damping conductance G<SP>1</SP>, the coupling coefficient being equal to G<SP>1</SP>/#C<SP>1</SP>. With this arrangement neutralization extends over a wider band of frequencies, Fig. 2 (not shown). The second circuit is preferably inductively coupled to the first and is arranged to have the same damping. In order to offset loss in gain, positive feedback may be utilized preferably by the use of a capacitor or inductor in the cathode lead. In a modification, Fig. 3 (not shown), the tuned circuits are replaced by resonant lines.
Patent GB-479753-A (GB)
Title: Process for refining textiles
IPC: D06M13/192
Filed: 1936-08-05
Abstract: The water-repellent properties of textiles are improved by treating them with inner anhydrides of dibasic carboxylic acids containing saturated or unsaturated open or cyclic carbon chains with at least seven carbon atoms, and subjecting the esterified materials to a salt-forming after-treatment whereby free carboxyl groups are combined with a base which is so selected that the capacity of the materials for taking up water is still further reduced.  Inner anhydrides of substituted succinic acids obtainable by condensing olefines with a -b -unsaturated dicarboxylic anhydrides or compounds which are converted into these anhydrides under the reaction conditions, may be used.  In particular, residues of succinic acids substituted by a side chain of at least nine carbon atoms, such as n-nonenyl-succinic, n-dodecenyl-succinic, n-pentadecenyl-succinic, or n-octadecenyl-succinic acid, or the corresponding iso-alkenyl compounds, may be used.  The textiles such as artificial silk or cotton fabrics may be immersed in a solution of the anhydride in a solvent such as carbon tetrachloride, the excess solution drained off, and the materials subjected to heating.  The anhydride may be applied in the form of an aqueous emulsion.  The free acid groups in the esterified material are then combined with a base so as to increase the water-repellent properties.  For the salt-forming treatment there may be used a free base or a salt of a weak acid, and if desired there may first be formed a water-sensitive salt which is then converted by double decomposition with another salt into a water-insensitive salt.  Salts of calcium, zinc, and aluminium, with the free carboxylic acid groups in the esterified textiles, may be formed.  In an example, cotton fabric is treated with isopentadecenyl succinic anhydride in carbon tetrachloride for a few minutes at raised temperature.  It is beaten until air dry and rinsed twice with hard well water with intermediate drying.  In another example, cotton fabric is treated with a solution of a substituted succinic anhydride obtained by condensation of tri-isopropyl-benzene with maleic anhydride, and is then rinsed with well water.  Artificial silk fabric is treated with a solution of n-octadecenyl succinic anhydride.  After the esterification, the fabric is treated with sodium carbonate solution and then with zinc chloride or alum.  The first Provisional Specification refers to Specification 441,016.
Patent GB-154985-A (GB)
Title: Improvements in and relating to electric welding apparatus
IPC: B23K11/31
Filed: 1919-09-03
Abstract: 154,985. British Thomson - Houston Co., (General Electric Co.). Sept. 3, 1919. Heating by electricity.-A transformer 1, Fig. 1, electrodes 4, 5 carried thereby, and a fluidpressure motor 11 form a single structure having bearings engaging with the inner surface of an annular carrier 22, so as to allow of rotation in a horizontal plane. The carrier 22 is pivoted on a bail 25 suspended from a chain 26. A plunger 14, carrying the electrode 5, is mounted on a yoke 13 secured to a reciprocating rod 12 passing through the transformer core 1. The electrode 5 is mounted on the extension 9 of a conducting bar 6 passing through the core. Copper conductors 8 may be attached to the bar 6 to reduce the resistance. A switch, controlling the heating-circuit, is interlocked with a valve controlling the supply of air to the motor 11, so that the switch and valve can only be worked in a definite order. The switch consists of a cylinder 47, Fig. 3, engaging with contacts 44, 45 and carried by a sleeve 51, which has a handle 34, and is formed at its lower end 52 with switches, engaging with projections on a collar 53 on the valvestem 33. The valve is rotated by the handle 34 to admit air to the motor, thereby moving the electrodes into engagement with the work 16. The parts 52, 53 are then disengaged by lifting the handle 34 against the action of a spring 46, and the cylinder 47 is moved into engagement with the contacts 44, 45 against the action of a spring 49, engaging with a member 43, as shown in Fig. 4. The switch is held in the closed position by the further engagement of the parts 52, 53. When the weld has been completed, the handle 34 is raised, so that the switch is returned to the " off " position by the spring 49. The parts 52, 53 may then be moved into engagement, and the valve rotated, so that the motor raises the electrode 5 from the work. A stop prevents closure of the switch before operation of the valve.
Patent GB-320699-A (GB)
Title: Improvements in the manufacture and production of vulcanised rubber
IPC: C08K5/00
Filed: 1928-07-26
Abstract: 320,699. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). July 26, 1928. Vulcanizing, materials.-Natural or synthetic rubber is vulcanized with an addition of an organic derivative of ammonia in which at least one hydrogen atom of the ammonia is substituted by an olefinic radicle. The remaining hydrogen atoms may or may not be substituted by the same radicle, or by an alkyl or aryl radicle. According to an example, 100 parts of rubber, 10 parts of zinc white, 6 parts of sulphur, and 1 part of butenylpiperidine are vulcanized for 40 minutes to 140‹C. Substances mentioned in other examples are methyldibutenylamine, methylbutenylamine, the reaction product of mercaptobenzothiazole and butenylpiperidine, butenyldicyclohexylamine, thioglycollic N-namylenylpiperidine, thiocarbamic methyl diamylenylamine, and the reaction product of vinyl acetate and ammonia. Specifications 313,934, [Class 2 (iii), Dyes &c.], and 324,959 are referred to.
Patent GB-409178-A (GB)
Title: Improvements in electrically synchronised apparatus, more particularly for electrical contact making devices
IPC: G05D3/12
Filed: 1933-08-02
Abstract: 409,178. Control of motors. ENGLISH ELECTRIC CO., Ltd., 28, Kingsway, London, and CAMPBELL, I. D., 14, Queensville Avenue, Stafford. Aug. 2, 1933, No. 21735. [Class 38 (iii).] Following movement of control member.-In a system for operating a motor driven trailer member step by step in synchronism with a master member, as in the synchronous operation of transformer tap-changing switches, a moving contact member C operated by the master member connects a supply point T1 with one of contacts A1-A8 connected across lines XY with pairs of contacts B1-B8, B11- B16 associated with a trailer member and connected with forward and reverse relays F, G for the motor. An insulating disc K rotated by the trailer member carries contacts L which, in the position shown, co-operate with the fixed contacts B1 &c. so as to connect those corresponding to contacts A7 and A8 with relay G, and those corresponding to contacts A1-A4 with relay F, contacts B6 and B16 corresponding to contact A6 being left free. Upon movement of arm C from contact A6, the appropriate relay is energized, and the disc K rotated until it has reached a position corresponding to that of the arm C.
Patent GB-694835-A (GB)
Title: Improvements in or relating to circuit-arrangements in which a signal is supplied toa control device
IPC: H04N5/53
Filed: 1951-09-17
Abstract: 694,835. Television. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 17, 1951 [Sept. 20, 1950], No. 21775/51. Class 40 (iii). [Also in Group XL (c)] Relates to means for producing a negative D.C. control voltage proportional to the amplitude of a reference portion of an electrical waveform, e.g. the sync. pulse or black-level step in a negatively modulated television video signal or the black-level step in a positively modulated signal. According to the present invention, the waveform is applied to the control grid 3 of a pentode amplifier 4 and the control voltage is developed across an integrating network 12, 13 connected to the suppressor grid 7 to which positive switching pulses 16 are applied during the reference periods of the input waveform, the pentode being constructed and operated so that the anode output signal is substantially independent of the potential variations at the suppressor grid. The suppressor grid may comprise a cage-shaped grid surrounding the other electrodes or rods supporting the other electrodes and insulated therefrom. The invention is described as applied to television receivers in which the control voltage is used to stabilize a reference level of the video signal, e.g. the black-level steps or the peaks of the sync. pulses, Figs. 1, 3 (not shown), and 4, or for A.G.C., Fig. 5 (see Group XL (c)), the positive pulses 16 being derived from the line scan generator. As shown in Fig. 1, the negative control voltage developed across the integrating network 12, 13 is fed back via a high resistance 15 to bias the control grid 3, the time constant of circuit 12, 13 being preferably five to ten times the period or maximum duration of the switching pulses. The effect of interference signals during the reference periods is reduced by the smoothing network comprising the output impedance of the preceding stage, the coupling capacitor 2 and resistor 15; this network, which has a time constant greater than that of circuit 12, 13, also prevents coupling between the input waveform and the switching pulses, which are developed across a coil 11 which may comprise an additional secondary winding on the line timebase output transformer. In a modification, Fig. 3 (not shown), the coil 11 and capacitor 12 are omitted and the switching pulses are applied to the suppressor grid via a capacitor which together with resistor 13 and the output impedance of the switching pulse source constitutes the integrating network and in a further modification, Fig. 4 (not shown), the feed-back is omitted, the amplified anode output signal is applied to the cathode of the cathode-ray tube and the output from the integrating circuit is applied through an additional smoothing circuit to the grid. In this latter modification the switching pulses may be applied to the suppressor as in Figs. 1 or 3.
Patent GB-1508292-A (GB)
Title: Spraying head
Inventor: TADA TETSUYA
IPC: B05B11/00
Filed: 1976-05-26
Abstract: 1508292 Reciprocating pumps T TADA 26 May 1976 [31 May 1975 26 Nov 1975] 21835/76 Heading F1A A sprayer, e.g. for insecticide, comprises a spring-loaded piston 35 movable on its discharge stroke by depressing a button 75 which acts via a lever 65 pivoted at 66, the button being guided by grooves 74 in a cap 22. A spray nozzle 41 may be mounted on the piston, as shown, or on the cylinder. A leakage-preventing stop-valve 57 on a stem 56 opens piston passage 58 when the piston moves downwardly, inlet and outlet check valves 52, 49 also being provided. A container vent 59 is controlled by a valve-member 61 attached to the piston. In another embodiment, Fig. 8 (not shown), the piston is closed at its bottom end and has radial ports (94) closed by a sealing ring (96) in the rest position of the piston to prevent leakage, ball inlet and outlet valves being provided and the container venting valve comprising a grooved rod (107) cooperating with a sealing ring (103).
Patent GB-1061915-A (GB)
Title: Process for stabilising hydrogen peroxide
IPC: C01B15/037
Filed: 1964-05-27
Abstract: Aqueous hydrogen peroxide solutions are stabilized by the addition of a water-soluble tin compound and tartaric acid.  The water-soluble tin compound may be an alkali metal stannate, e.g. sodium stannate. The water-soluble tin compound is used in amounts of 2.5 to 5 mg. per litre and the tartaric acid in amounts of 2.5 to 10 mg. per litre of solution. Ammonium nitrate (added to reduce the corrosiveness of hydrogen peroxide solutions) may also be present in the solution.
Patent GB-1261685-A (GB)
Title: Purification of crude 2-mercaptobenzothiazole
IPC: C07D277/72
Filed: 1970-05-06
Abstract: 1,261,685. 2-Mercaptobenzothiazole. SUMITOMO CHEMICAL CO. Ltd. 6 May, 1970 [8 May, 1969], No. 21875/70. Heading C2C. A process for purifying crude 2-mercaptobenzothiazole obtained by reaction of aniline, S and CS 2  comprises vaporizing the crude mercaptobenzothiazole to remove non-volatile impurities, e.g. at 190-250C. and 0À5 to 5À0 mm. Hg. This is preferably followed by condensing the vaporized matter and dissolving the condensate in aqueous alkali to remove insolubles, and then preferably extracting the resulting alkaline solution with an aromatic hydrocarbon to remove further impurities. The 2-mercaptobenzothiazole may be recovered from the alkaline solution by acidification.
Patent GB-500298-A (GB)
Title: Improvements in the manufacture and production of plastic masses from polymerised vinyl compounds
Inventor: JOHNSON GEORGE WILLIAM
IPC: B29C39/00
Filed: 1937-08-09
Abstract: 500,298. Plastic masses. JOHNSON, G. W. (I. G. Farbenindustrie Akt.-Ges.) Aug. 9, 1937, Nos. 21879/37, 15614/38, and 18439/38. [Classes 2 (ii) and 2 (iii)] Pastes obtained by blending finely divided polyvinyl compounds with a substantially non- volatile plasticizing agent in which they are scarcely soluble at ordinary temperature are gelatinized by heating in the absence of pressure. The blending of the polyvinyl compound and the plastizer is effected in the absence of heat or pressure. The gelatinization may be effected in a mould or in a thin layer on a support. The viscosity of the pastes may be reduced by mechanical treatment in colour mills, roller mills or homogenizing machines or by the addition'of volatile diluents. Porous products may be obtained by introducing air or other gas or gas producing substance during the blending. The pastes may be used in the manufacture of packing rings, packing plates printing rollers, porous packing materials, heat and sound insulation, coating metal surfaces, coating and impregnating paper, leather, textiles, and building materials and for coating wires and cables, the pastes being subsequently gelatinized. In examples, pastes, to be subsequently gelatinized are prepared from polyvinyl chloride and tricresyl phosphate with or without the addition of chalk, talc, dodecyl phthalate, the benzoate of ethylene glycol monoxylenyl ether, slate meal, or silicious chalk, polyvinyl chloride, triphenyl phosphate and diethylene glycol dibenzoate, polyvinyl chloride and diethylene glycol dibenzoate, polyvinyl chloride and the neutral phthalic acid ester of diethylene glycol monomethyl ether, and an interpolymer of vinyl chloride and ethyl acrylate and tricresyl phosphate, dodecyl phthalate and medianyl benzoate. The second Provisional Specification also refers to the gelatinization of similar pastes prepared from other organic thermoplastic compounds such as acetyl cellulose, benzylcellulose, ethylcellulose and chlororubber. An example illustrates the production and gelatinization of a paste prepared from benzylcellulose, tricresyl phosphate, dibutyl phthalate and benzylnaphthalene.