baber/WOPTO huggingface dataset:
Patent GB-484476-A (GB)
Title: Manufacture of condensation products from polyvinyl esters
IPC: C08F8/28
Filed: 1936-10-31
Abstract: Polyvinyl acetals are prepared by condensing one or more vinyl ester polymers and/or mixed polymerization products of vinyl esters in aqueous emulsion with carbonyl compounds in the presence of strong acid in such concentration that a solution is produced. The acetal may be isolated by addition of water.  Specified materials are: polymers, polyvinyl acetate, formate, chloracetate, propionate, and butyrate, and interpolymers of vinyl esters with maleic anhydride, maleic esters, viny chloride, styrene, methyl vinyl ketone; carbonyl compounds, formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, ethyl hexanal, aldol, crotonaldehyde, glyoxal, paraformaldehyde, paraldehyde; acetone, diethylketone, acetophenone, cyclohexanone; and mixtures of formaldehyde and acetaldehyde, formaldehyde and butyraldehyde, acetaldehyde and butyraldehyde, formaldehyde and acetone; acids, sulphuric, hydrochloric, phosphoric, and toluene-sulphonic acids or mixtures thereof.  There may also be present a complex-forming salt of the first or second group of the Periodic System, e.g. lithium bromide, zinc chloride.  The product may be used for spraying, for films, celluloid substitutes, interlayers for safety glass, and for electrotechnical purposes.  In examples: an aqeous emulsion of polyvinyl acetate is gradually introduced into a solution of paraformaldehyde or cyclohexanone in concentrated hydrochloric acid, or into a solution of formaldehyde or paraldehyde in strong sulphuric acid, and the product precipitated by water; or an aqueous emulsion of polyvinyl acetate is gradually introduced into a solution of paraformaldehyde in strong sulphuric acid and followed by cyclohexanone, and the product precipitated by water.  Solvents specified for the products are methylene chloride, alcohol, ethyl acetate, benzene, and mixtures thereof; ethylene chloride; mixtures of methylene or ethylene chloride with chloroform and carbon tetrachloride.  Specification 466,173 is referred to.  The Provisional Specification includes examples in which an emulsion of polyvinyl acetate is gradually stirred into a solution of paraformaldehyde in strong sulphuric acid or into solutions of formaldehyde (with or without paraformaldehyde), acetaldehyde, or acetone, in concentrated hydrochloric acid and in which an emulsion of a mixed polymer of vinyl acetate and vinyl chloride is gradually stirred into a solution of paraformaldehyde in concentrated hydrochloric acid.
Patent GB-298906-A (GB)
Title: Improvements in or relating to gaseous glow lamps
IPC: H05B41/18
Filed: 1928-10-15
Abstract: 298,906. British Thomson-Houston Co., Ltd., (Assignees of Hull, A. W.). Oct. 15, 1927, [Convention date]. Vacuum tubes; low-pressure metallic-vapour apparatus.-In a gaseous glow lamp the space between a thermionic cathode and the anodes is such that the potential drop in the luminous column between the electrodes is greater than the combined drop at the electrodes, the cathode being constructed to operate with an electron emission sufficiently great to maintain the luminous discharge at a temperature of inappreciable thermal volatilization, and means are provided to maintain the operating current below a value at which electrical sputtering of the cathode would become appreciable. An indirectly-heated cathode is used, that shown in Figs. 2 and 5 comprising a coated nickel cylinder 19 containing two heating coils 25, 25<1> arranged in series and connected at 26 to the cylinder, the coils being embedded in magnesia &c. The coating may consist of an alkalineearth compound, e.g. barium carbonate, which is heat-treated up to 1300‹ C. to render it active. Barium-coated nickel is treated close to the melting-point of nickel. The cathode heater may be energized initially by an auxiliary transformer 21 and the discharge started by a highfrequency device 23. When the discharge starts the current operates a switch 24 to disconnect the transformer 21, and flows through the coils 25, 25<1> to heat the cathode. The glass, silica, or the like envelope is expanded at 11 about the cathode to avoid overheating, and a drop 12 of mercury may be introduced to supply vapour. A direct-current tube is shown in Fig. 3 in which overheating of the envelope is prevented by a shield 33 around the cathode. This is coated internally similarly to the external surface of the cathode 29. One end of the single heating-coil 30 is connected to the end of the cylinder 29. The heating-circuit contains a mercury switch 42 which makes and breaks the circuit, thus impressing high potential impulses on the lamp, until the discharge starts, the discharge current then keeping the switch open. The resistances of the heater alone may be such as to limit the discharge current below the value at which the potential drop at the cathode would cause excessive sputtering, or external resistances or other means may be provided for this purpose.
Patent GB-1516728-A (GB)
Title: Escape device
IPC: A62B1/12
Filed: 1975-07-16
Abstract: 1516728 Spring drum apparatus J LASSCHE 16 July 1975 [18 July 1974] 29742/75 Heading B8B A spring drum device facilitating the lowering of a person from an elevation on a belt 5 in an emergency, comprises a drum 4 for the belt 5, journalled in a frame 1, 2, 3 supported in the elevated position and being associated with a spiral spring 10 which is tensioned by reverse winding during unwinding of the belt 5 from the drum 4 and a belt pay out braking device in the form of wind blades. During pay out of the belt 5, the drum 4 drives through pinions 7 and 8, a shaft to which one end of the spiral spring 10 is secured, whereby the spring is unwound from its rotatable stock reel 9 to accumulate return tension for when the belt load is released. The belt leaving the drum 4 passes around a series of rollers 11, 12, 13 which through lever and spring mounting arrangements, increase their frictional grip on the belt with increase in tension therein, and rotation of the roller 12 transmits its drive through gearing to the braking device, which limits the pay out speed of the belt. The braking device Figs. 4, 5 (not shown) comprises a disc rotatably driven by said gearing and incoporating a pair of wind blades pivotally mounted on aligned radial axes and spring biased towards the disc surface. With increasing speed of disc rotation, the blades are pivoted by the wind, against the springs and extensions of the blades on the remote side of the disc are moved into engagement with a fixed brake lining disc. In another embodiment Figs. 6, 7 (not shown) the wind blades are mounted on axes parallel with the disc axes and the brake lining takes the form of a fixed drum. In a further embodiment Fig. 12 (not shown), a wind wheel with a plurality of fixed radial blades is mounted for rotation in a housing having an open air inlet and an outlet incorporating a pivoted flap, which is closed by increasing wind pressure and upon pivoting applies a brake block to the wind wheel. In a final embodiment Fig. 13 (not shown), two radial blade wheels having tangential peripheries are rotated simultaneously in opposite directions, the wind produced by one having a braking effect on the other and conversely. The housing for each wheel has an open outlet and a spring loaded flap controlled inlet. The device may be mounted on the free end of an angled structure Fig. 10 (not shown) pivoted about a vertical axis to the inside of a building wall adjacent a window frame, through which the structure extends when pivoted into its operative position outside the building.
Patent GB-996764-A (GB)
Title: A new or improved bearing material
Inventor: GARDINER NORMAN ARTHUR
IPC: C08L27/18
Filed: 1961-08-18
Abstract: Moulded composite bearing materials comprise polytetrafluoroethylene which has been converted to a fibrous form firmly incorporated in a cured resin matrix, the resin being a phenolformaldehyde or cresol-formaldehyde condensate, a urethane polymer or a vulcanizable rubber.  Fillers, e.g. metals, graphite and molybdenum disulphide may also be present. The polytetrafluoroethylene may be converted to fibrous form by subjecting it to compaction and shearing forces at temperatures below the sintering temperature.  In Examples: (1) a phenol-formaldehyde resin, graphite, lead powder and P.T.F.E. are mixed in a conventional mixer, and (2) a liquid urethane polymer, 4,41-methylene bis-(2-chloroaniline) and P.T.F.E. are compounded on a rubber mill.  The products may be moulded, or coated on or laminated to rigid or flexible backing members to form plain bearings.
Patent GB-226805-A (GB)
Title: Improvements in or relating to internal combustion engines
IPC: F02B19/04
Filed: 1924-12-11
Abstract: 226,805. Held, G. Dec. 20, 1923, [Convention date]. Cylinders receiving liquid fuel; heating charge. -Air supplied by a pump or centrifugal fan is heated in a series of pipes 7 situated within the exhaust pipe 8 and is delivered through terminal ports 12 to a cylinder, the combustion chamber of which has the form of a torus, the fuel being injected laterally in the direction of the arrows b-a from a central injector 5. The annular space 4, through which air passes at the end of the instroke from the compression space 10 to the combustion chamber is directed tangentially to the outer wall of the combustion chamber, to produce a vortex-like whirl of the charge. In a multicylinder engine the air passes in succession through heating pipes 7 in the exhaust pipes of each cylinder, and is delivered to the inlet ports 12 from a conduit 9 extending the whole length of the row of cylinders.
Patent GB-521493-A (GB)
Title: Improvements in or relating to launching torpedoes
IPC: F41F3/08
Filed: 1938-10-14
Abstract: 521,493. Torpedo tubes. PAINE, H. SCOTT-. Oct. 14, 1938, Nos. 29855 and 32908. [Class 9 (ii)]  A torpedo tube, for use above water level on a highspeed motor boat is mounted for movement in the direction of its length and resilient means are provided between the tube and a fixed part of the mounting to absorb recoil due to the discharge of the torpedo. Fig. 1 shows a deck tube 5 supported at each side on a parallelogram linkwork frame 8; 9, 10, 11, which permits the tube to rise on firing against the action of piston and cylinder resilient devices 25 to absorb recoil. The links 8 at the rear are hinged at 31 to a turntable 22 and the front links 9 are connected to a member 18 sliding in arcuate guides 17, Fig. 2, the arrangement permitting the tube to be moved by screw gear 70 to an 'outboard firing position 57 or to inboard positions 47 which facilitate loading. Modifications; are described (1) in which the tube is mounted for longitudinal sliding movement to take up recoil, and (2) in which the pivotal connections, of the links 8, 9 are provided with spring devices in the form of torsion rods or rubber bushes to replace the spring device 25. Specification 471,809 is referred to.
Patent GB-427962-A (GB)
Title: Improvements in or relating to the production of photographic diazotype prints
IPC: G03C1/52
Filed: 1933-10-27
Abstract: 427,962. Photographic diazotype processes. LEUCH, W. P., and HARDING, Ltd., S. C. & P., Alliance Works, Denmark Hill, London. Oct. 27, 1933, Nos. 29878 and 33497. [Class 98 (ii)] Papers coated with a light-sensitive layer containing a diazo compound capable of coupling under neutral or acid conditions are dried after coating and a powder containing the coupling component is dusted over the layer. The coating containing the coupling component may also contain a salt of a strong base and a weak acid which is capable of acting as a coupling accelerator. Development of the papers is effected by water which may be applied in the form of steam or water vapour, or in a developing machine in which case the water may contain a salt which prevents running of the lines or a salt acting as a coupling accelerator or both, or as water combined in a hydrated salt which dissociates on heating, development in this case being effected by heating the paper to which the hydrated salt has been applied. In a further method of development, the paper may be pressed onto the surface of a moist gelatinous composition. Diazo compounds suitable for the process are those which contain an acidic substituent in the aryl nucleus such as OH, COOH, C1, Br, NO2, HSO3, or alkyl, aryl or aralkyl ether groups such as OCH3, OC8H2.C6H5 or OC6H5 and diazo compounds of the diphenyl, diphenylmethane and triphenylmethane series. In examples (1) paper is coated with a solution containing the zinc chloride double salt of 5-benzoylamino:1 :4-diethoxy - 2 - diazonium chloride and aluminium sulphate and the dried paper is then dusted with a powder of flour and phloroglucinol. It may be developed by steam, by pressing on moist gelatin, or in a developing machine using a solution of sodium acetate and tartaric acid, and (2) the paper of example (1) is dusted over with a powder consisting of flour, sodium benzoate and phloroglucinol and developed with water in a developing machine. The second Provisional Specification refers to the use of a coupling component appied to the back of the material, development being effected by aqueous alcohol.
Patent GB-951818-A (GB)
Title: Polyester moulding materials
Inventor: OKAMURA MICHIHIKO
IPC: C08L69/00
Filed: 1961-08-18
Abstract: A moulding composition comprises (1) 95 to 5% by weight of a polycarbonate derived from a 4, 41-dihydroxy-di(mononuclear aryl)-alkane and (2) 5 to 95% by weight of a polyalkylene terephthalate.  The composition is made by melting the resin together and may also contain a stabiliser (e.g. phosphorous acid or triphenyl phosphite) or a pigment or filler (e.g. carbon black, titanium white, alumina, silica or asbestos). In examples, the polycarbonate of bis-phenol A is mixed with polyethylene terephthalate. Specifications 578,079 and 772,627 are referred to.
Patent GB-878513-A (GB)
Title: Improvements in or relating to hosiery articles
IPC: F23L1/00
Filed: 1957-09-24
Abstract: A stocking, sock or the like, is formed from a continuous filament or staple yarn produced wholly from polypropylene of high crystallinity. Specification 813,891 also is referred to.
Patent GB-424484-A (GB)
Title: Improvements in cooking stoves
IPC: F24C15/16
Filed: 1934-10-19
Abstract: 424,484. Cooking-stoves. HADDAN, R., 31, Bedford Street, Strand, London.- (Moffats, Ltd.; Dennison Avenue, Weston, Ontario, Canada) Oct. 19, 1934, No. 30014. [Class 126] One of the racks 6 for supporting a grillpan beneath a burner 4 at the top of an oven is movable to an out-of-use position in which it forms no substantial obstruction to the oven space. In the oven shown, it is slidably and rotatably suspended by lugs 6b from a rod 7 secured to the oven top, and is secured in the vertical position shown in full lines by a spring 12 which forces it to the rear until its rear edge is engaged between the flanges of a fixed upright channel member 9. When the full oven span is required, it is pulled forward to disengage it from the member 9 and then turned up to a position immediately below the oven top, in which it is retained by a pivoted counterbalanced latch 8.
Patent GB-732043-A (GB)
Title: Improvements relating to hydraulic brakes for vehicles
IPC: F16D57/06
Filed: 1950-12-07
Abstract: 732,043. Hydraulic braking systems. DAIMLER-BENZ AKT.-GES. Dec. 7, 1950 [Jan. 22, 1949], No. 30030/50. Class 103 (1). In a hydraulic braking system for a motor vehicle, of the kind in which the braking pressure is obtained by throttling the delivery from a rotary pump a driven from the vehicle transmission, the pump is driven from the transmission on the driven side of the changespeed gearing and the brake fluid system consists solely of a reservoir b, the pump a, the throttle valve e, and a relief valve g, the braking being effected solely by the pump. A slipping clutch may be interposed between the vehicle drive and the pump a to come into action as a safety device when the pump resistance reaches a predetermined value.
Patent GB-226229-A (GB)
Title: Improvements in or relating to connections for metal structures
IPC: E04B1/58
Filed: 1924-12-13
Abstract: 226,229. Kloet, W. J. van der, and Stift, W. A. L. Dec. 13, 1923, [Convention date]. Struts, tie-rods, and strut and tie-rod connections.-Relates to a method of forming the ends of metal tubes for connections of the type described in Specification 193,153, [Class 20 (iv), Floors &c.], which consists in inserting plugs into the ends of the tubes and then flattening said plugged ends. The plugs, which are preferably of steel, are first united to the tubes 1 by welding or brazing, whereupon the plugged ends are treated by forging or stamping, &c., to produce the flattened ends 2 and a more or less solid formation at the end of the tube. As in the prior Specification, the flattened plugged end of each tube may be arranged with shoulders 3 and quadrant-shaped projections 4, 4<1>, to engage correspondingly shaped recesses in a second tube, or, in the case where several tubes are connected at one point, with projections 7, 7<1> on one side and recesses 6, 6<1> on the other side.
Patent GB-1275454-A (GB)
Title: Apparatus for meterless exposure value indication
Inventor: LINDNER FRITZ
IPC: G01J1/12
Filed: 1969-06-13
Abstract: 1275454 Exposure control apparatus KOMBINAT VEB PENTACON DRESDEN KAMERA-UND KINOWERKE 13 June 1969 30047/69 Heading G2A An indicator for an exposure device comprises two lamps 1 and 8 the brightness of which are compared to assess over, under exposure, or correct exposure, The lamp 1 is illuminated independently of the exposure setting by voltage source 4, while lamp 8 is supplied through a photo-conductive cell 5 exposed to the light of the picture taking ray path. Resistances 6 and 7 are coupled to member for exposure time and film sensitivity and with a diaphragm setting member. Each lamp 1 and 8 is behind an adjoining transparent surface 11, 12 covered with a strip 14 of varying transparency. In use, if the surface 11 visible beside the strip 14 is brighter than the surface 12 then under exposure is indicated and vice-versa. Instead of lamps, electroluminescent plates may be used in which case a comparison of both brightness and colour is possible. In the case of colour comparison, one of the electro-luminescent plates is supplied by a circuit arrangement having a variable frequency influenced by the photo-conductive cell and resistances 6, 7. The transparent surface 12 may have sections of varying transparency each provided with a printed symbol which indicate by their visibility battery voltage.
Patent GB-466772-A (GB)
Title: Improvements in dyeings
Filed: 1935-10-31
Abstract: Substantive and unspecified types of dyes, dyeing with.--The fastness, especially to water, of substantive or other dyeings is improved by an after-treatment with a compound of the general formula <FORM:0466772/IV/1> wherein X1, X2 and X3 represent aliphatic radicles, Hal represents halogen, R represents an aliphatic hydrocarbon radicle containing not more than 5 carbon atoms, and Y=OR1 or <FORM:0466772/IV/2> , wherein R1 represents an aliphatic hydrocarbon radicle containing not more than 9 carbon atoms, R2 and R3 represent H or an organic radicle, at least one of the radicles X1, X2 or X3 or one of the radicles R1, R2 or R3 being an aliphatic radicle containing more than 6 carbon atoms.  The following examples are specified: (1) a cotton fabric, dyed with Diamine fast red 8BL, is treated for \ba1/4\be hour with a cold solution of acetostearylamidodimethylbetaine methyl ester chloride, hydroextracted and dried; (2) cuprammonium artificial silk, dyed with Diamine fast red 8BL, is treated for \ba1/2\be hour with a solution at 20 DEG  C. of trimethylbetainestearylamide chloride; (3) a cotton-cuprammonium artificial silk mixed fabric, dyed with Diamine fast red 8BL, is treated for \ba1/4\be hour with a cold solution of stearyldimethylbetainedodecylamide chloride, hydroextracted and dried; (4) a hank of cotton, dyed with Cotton yellow CH, is treated with a solution of trimethylbetaineoleylamide chloride, hydroextracted and dried; (5) loose viscose artificial silk, dyed with Diamine fast red 8BL, is treated with a solution of stearyldimethylbetaine methyl ester chloride, (cf. Specification 462,720), hydroextracted and dried. Other specified after-treatment agents are oleyldiethanolbetaine ethyl ester chloride, (cf. Specification 462,720), palmityldimethylbetainedimethylamide chloride, tetramethylethylenedibetainestearylamide dichloride and acetododecylamidodimethylbetaine dodecyl - amide chloride. Specification 390,553 is referred to.  Trimethylbetaine - oleyl - and - stearyl-amide chlorides are obtained by condensing trimethyl amine with chloracetic acid ester and treating the product with oleylamine and stearylamine respectively. Tetramethylethylenedibetainestearylamide dichloride is obtained by condensing tetramethylethylenediamine with chloracetic acid ester and treating the product with stearylamine. Stearyldimethylbetainedodecylamide chloride is obtained by treating stearyldimethylbetaine methyl ester chloride with dodecylamine. Palmityldimethylbetaine dimethylamide chloride is obtained by treating palmityldimethylbetaine methyl ester chloride (cf. Specification 462,720) with dimethylamine. Acetododecylamidodimethylbetainedodecylamide chloride is obtained by condensing chloracetyl chloride with (dodecylamine and reacting the product successively with dimethylamine chloracetic acid ester and dodecylamine.
Patent GB-359186-A (GB)
Title: Improvements relating to valve operating mechanism for internal combustion engines
IPC: F01L9/20
Filed: 1930-10-08
Abstract: 359,186. Mechanical make-and-break switches. FROGGATT, R. E., 134, Orchard Road, Erdington, Birmingham. Oct. 8, 1930, No. 30107. [Class 38 (v).] Internal - combustion valves are each fitted with a pair of e 1 e c tromagnets, one of which serves for opening, and the other for closing the valve, the magnets being deenergized by short - circuiting them, the time when this occurs being varied by adjustment of a rotary switch. Fig. 1 indicates valves a, b fitted with solenoid plungers d, each subject to the action of a pair of windings. The windings f, h serve to open, and the windings e, g close the valves. Current is supplied from a battery i to the coils in the proper sequence by a rotary switch fitted with short segments j, i and long segments k, m connected up as shown, the windings being de-energized by being short-circuited by brushes n. The flow of current when this occurs is restricted by forming the brushes n with a high resistance in the transverse direction ; or a resistance 2 may be inserted. In a modification, the two windings of a valve are arranged in series, actuation of the plunger being effected at each reversal of current. For adjusting the timing of the valves, the ends of the switch segments, j .. m are inclined as shown in Fig. 5, and the brushes n are adjusted axially to the switch. The segments j m are coupled to a metal ring p at one end of the switch, and the segments k, l are coupled to a metal bush q, a brush r contacting with the ring p being connected to the battery.
Patent GB-509560-A (GB)
Title: Improvements in or relating to vacuum cleaners
IPC: A47L5/36
Filed: 1938-10-18
Abstract: 509,560. Vacuum, cleaners; air filters. ELECTROLUX, Ltd. Oct. 18, 1938, No. 30165. Convention date, Oct. 27, 1937. Addition to 465,582. [Classes 8 (i) and 8 (ii)] A vacuum cleaner is provided with a fine filter in the air stream between the dust bag 37 and the motor-fan unit, and a further fine filter in the stream between the fan and the outlet, as in the parent Specification, the two fine filters being intercommunicated, e.g., by constituting the sides and base of a filter bag 22, separated by a partition 32, to form an exchangeable unit. In a modification, the sides of the bag 22 are double held apart by a partition with rounded ends.