baber/WOPTO huggingface dataset:
Patent GB-639999-A (GB)
Title: Improvements in or relating to vinyl interpolymers
IPC: C08F214/06
Filed: 1947-02-19
Abstract: A mixture of 40-95 per cent by weight of vinyl chloride, 2 to 40 per cent of vinylidene chloride, and 2 to 25 per cent of an alkyl ester of acrylic acid is polymerized, the mixture of vinylidene chloride and acrylic ester being added at a substantially uniform rate to an aqueous emulsion of the vinyl chloride during polymerization. Preferably the amount of acrylate exceeds that of vinylidene chloride.  Acrylates specified are methyl, ethyl, n-propyl, iso-propyl, n-butyl, isobutyl, n-amyl, 2-ethylhexyl, lauryl, n-octadecyl esters.  Actinic radiation, as well as hydrogen, benzoyl or caprylyl peroxides, potassium persulphate or sodium perborate may be used.  Buffers such as sodium bicarbonate, sodium acid phosphate, lead acetate or ammonium hydroxide may be present.  The reaction may be carried out at a temperature ranging from room temperature to 100 DEG  C. and higher, in a stainless steel container, and in the absence of air.  Soaps such as sodium oleate, potassium palmitate, or sodium myristate, rosin or dehydrogenated rosin soaps, hymolal sulphates, sodium lauryl sulphates, sodium isopropyl naphthalene sulphonate and the sodium salt of N-octadecyl-N-(1,2-dicarboethyl) sulphosuccinamide may be used as emulsifiers.  Plasticizers, pigments and stabilizers may be added during or after copolymerization.  The products may be made into films and sheets, or used as a latex, or to make corrosion resistant pipes, gramophone records and extruded goods. The Specification as open to inspection under Sect. 91 comprises also polymerization in bulk and in solvents, with or without the gradual addition of monomers during the process.  This subject-matter does not appear in the Specification as accepted.
Patent GB-306946-A (GB)
Title: Improvements in expansible wheels
IPC: B24D9/02
Filed: 1929-02-13
Abstract: 306,946. Abrasive Wheel & Equipment Co., Inc., (Assignees of Mason, J. M.). Feb. 28, 1928, [Convention date]. Detachable-rim attachments to wheels.-An expansible wheel device particularly adapted to be fitted with a peripheral band of abrasive material, but applicable also to vehicle wheels having a separate annular tyre of rigid or resilient material, comprises a number of rim elements which may be expanded and secured against centrifugal forces by means of flexible side plates actuated by a central screw. A central disc 1, built up of disc elements 1<a> separated by a spacing plate 1<b>, is fitted with a number of independent rim segments 3, Fig. 5, each segment having a tongue. 4 sliding between the discs 1<a> and having limited radial movement therein by means of rivets 5 and slots 6. The side edges of each segment are grooved at 7, these grooves being adjacent to inclined faces 8 which are adapted to coact with faces 9 of a pair of flexible steel side plates 1C. These plates are secured to hub members 12, and are forced together to expand the wheel by means of a nut 15 screwing on a central spindle 13. In the expanded position, beads 11 on the side plates engage the grooves 7 to hold the rim segments firmly in position. The segments are additionally secured by the engagement of the rivets 5 with the ends of the slots 6. Each rim segment carries a plate 17 fitted with longitudinal cleat members 18 which are of flanged channel section, as shown in Fig. 2. The flanged portions 21 are provided with extensions 22, 23, the latter being slightly raised so that when the rim elements are assembled the extensions 22, 23 interengage to form continuous rings. The body portions of the rim segments are hollowed out at 26 to reduce weight. An annulus 30 of rubber or other elastic material is formed over the members 3 on the cleats while the wheel is contracted, this annulus having thickened portions 30<a> so that a circular face is obtained when the wheel is expanded. A continuous band 31 of emery cloth, sand paper, or other suitable material is slipped over this annulus. The plates 10 are of dished formation and are strengthened by radial ribs 32.
Patent GB-218617-A (GB)
Title: Improvements relating to acoustic signalling
IPC: G10K9/20
Filed: 1924-02-26
Abstract: 218,617. Schieferstein, G. H. July 4, 1923, [Convention date]. Diaphragm horns; sound magnifying and directing appliances.-A diaphragm and attached mass forming an oscillating system of pronounced natural frequency is excited continuously in accordance with a sine curve by an unbalanced rotating weight operated through an elastic transmission means from a rotary mechanical system. As shown in Fig. 1, a pulley k, loaded by an eccentric mass, is mounted in a shoe a on the diaphragm b and is rotated by an elastic belt r passing over the pulley of an electric motor. One or more tuned devices comprising weights z<1> - - z<3>, Fig. 3, mounted on elastic strips, may be attached to the diaphragm, and a corresponding number of pulleys k<1> - - k<3> having different speeds may be provided. In addition, a system of adjustable resonating tubes 1, 2, 3. Fig. 4, may be provided. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification in which the diaphragm is oscillated by means other than an eccentric rotating mass, such as a vibrating pin s, Fig. 5 (Cancelled), acting on the diaphragm like a hammer and driven by a crank. This subject-matter does not appear in the Specification as accepted.
Patent GB-691949-A (GB)
Title: Improvements in or relating to shutters for casting concrete
IPC: E04G9/06
Filed: 1951-02-28
Abstract: 691,949. Shuttering for casting concrete walls. BLACKBURN (DUMBARTON), Ltd., and ROSS, G. S. Feb. 28, 1951, No. 4914/51. Class 20(ii) An external removable wall shutter comprising a timber frame covered with expanded metal, has a window or door opening 4, along the lower edge 6 of which is a core to form a pocket in the wall in which the window sill is subsequently inserted, the core having an aperture through which concrete may be poured. The top and sides of the window opening are defined by bridging between the external and an internal shutter with planks or by means of a metal ingo as described in Specification 691,950. The top of the shutter carries a walkway for workmen.
Patent GB-377126-A (GB)
Title: Pulsator for milking machines
IPC: A01J5/10
Filed: 1932-02-19
Abstract: 377,126. Cow-milkers. PERSOONS, J. and PERSOONS, A., Thildonck, Belgium. Feb. 19, 1932, No. 4972. Convention date, Feb. 20, 1931. [Class 84.] A pulsator for milking - machines comprises a rotary valve 6 having two opposite peripheral ports 8, 9 situated in different transverse planes and permanently in communication with conduits 10, 11 in the axis of the valve, the conduit 10 being connected to a suction device while the conduit 11 communicates with the open air. Each port 8, 9 further communicates with two opposite openings 18, 20 and 19, 21 in the body 1 of the pulsator, and such openings are connected in pairs, 18, 19 and 20, 21 to nozzles 22, 23 which communicate with the milking devices. The valve 6 is rotated by an electric motor through a worm 26 and gear wheel 25 which are housed in a casing 3 formed in the body 1 of the device.
Patent GB-1185411-A (GB)
Title: Improvements relating to Decatising Machines.
IPC: D06C7/00
Filed: 1968-01-31
Abstract: 1,185,411. Decatising machines. DRABERT SOHNE. 31 Jan., 1968 [3 March, 1967], No. 5033/68. Heading D1L. In a decatising machine there is provided a pivotally mounted tensioning bar 9, a pressure roller 4 and a pivotally mounted suction table 13 coupled to the tensioning bar 9 and pressure roller 4, a decatising cylinder 3 and means for feeding cloth 1 and a wrapper 2 over the bar 9, table 13 and roller 4 onto the decatising cylinder 3 to form a roll, the pressure, roller 4 bearing against the roll formed on cylinder 3 and together with the table 13 being adapted to swing outwardly from the cylinder 3 as the diameter of the roll increases. Preferably a pair of guide arms 7, (8) connect the tensioning bar 9 to the pressure roller 4 and also support the suction table 13. A pair of fluid operated doubleacting cylinders 5, act on the guide arms 7, 8 adjacent the ends thereof connected to the bar 9 to press the roller 4 against the roll on cylinder 3. The suction table consists of a trough-like housing 12 covered with a perforated plate 13, the housing 12 being connected to a source of suction. The density of perforations in the plate 13 is greater along the two longitudinally extending marginal regions than in the central region. If desired a nozzle chamber (14, Fig. 3) can be located above the suction table and hot-air, steam or other gas can be blown onto the cloth and wrapper as they pass over the suction plateto give a desired drying action.
Patent GB-985012-A (GB)
Title: Assembly strip of clips
Inventor: TIPPER MAYNARD J G
IPC: F16B15/08
Filed: 1963-02-07
Abstract: 985,012. Strips of staples. TIPPER TIE Inc. Feb. 7, 1963, No. 5049/63. Heading F2H. In an assembly strip of generally U-shaped clips, the clips are temporarily held together with their faces abutting, by two adhesively faced flexible tape bands 14, 15 positioned respectively on the top and side of the assembly. A further band of tape may be provided on the other side of the assembly. A clip of modified shape, Figs. 5, 6 (not shown) comprises a bar connecting the depending arms which is provided with a depressed ledge wherein the top band of tape can be placed. In another modification, Fig. 7, the clip is of modified U-shape, the bar 31 being provided with a depressed ledge 32.
Patent GB-515197-A (GB)
Title: Improvements in or relating to gas or vapour filled electric discharge tubes
IPC: H01J61/04
Filed: 1938-02-18
Abstract: 515,197. Discharge lamps. OERENSOFI, N. S. Feb. 18, 1938, No. 5072. [Class 39 (i)] A discharge lamp especially a high pressure lamp, is provided with mean! for promoting cir culation consisting of a structure of several cylinders of quartz &c. surround ing practically the whole of the dis charge path. Fig. 1 shows an arrange ment of a number of cylinders 6 supported at intervals on mem bers 7. Fig. 3 show! two cylinders 6a, 6b supported at the ends of the lamp by members 7a and sur rounded by a co axial cylinder 10 other arrangement! of coaxial shields are also described. The lamp may be provided with as many as three auxiliary electrodes at each end and shields may be arranged in connection with the discharges from these electrodes. The envelope may consist of a cylinder of quartz fitting closely within an outer envelope of borosilicate glass, through which the leads are sealed. Specification 472,649 is referred to.
Patent GB-306539-A (GB)
Title: Improvement in radio receiving system
IPC: H03J3/06
Filed: 1929-02-15
Abstract: 306,539. Brandes, Ltd., (Assignees of Kolster, F. A.). Feb. 23, 1928, [Convention date]. Void [Published under Sect 91 of the Acts]. Thermionic amplifiers; filter circuits. - The high-frequency stages of a wireless receiver are rendered equally sensitive at all frequencies within its tuning-range by connecting the aerial to the amplifier through a circuit which is resonant at two frequencies lying near or just beyond the frequency limits of the tuning-range. As shown in Fig. 1, the aerial circuit includes a coil L1 shunted by a coil L2 in series with a condenser C2, and the grid and filament of a valve 26 is connected across the condenser C2. The plate circuit of the valve 26 is coupled to the first stage of a multi-valve amplifier A1, A2 with unitary control of the several tuned stages. Such an amplifier shows a falling off in sensitivity at both limits of its tuning-range, and this is corrected bv the double resonance of the aerial circuit. The condenser C2 is small compared with the aerial capacity, and may in some cases be omitted. Correct adjustment of the unitary control is not affected by changes in aerial dimensions. The resonance peaks of the aerial circuit are preferably broadened by winding the coil L2 with resistance wire. Resistances may be inserted in the grid circuits of the amplifiers to prevent self-oscillation on the shorter waves.
Patent GB-657235-A (GB)
Title: Improvements in or relating to holders or trees for use in cleaning and polishing boots and shoes
IPC: A47L23/18
Filed: 1949-02-24
Abstract: 657,235. Holders or trees for use in cleaning shoes. RICHARDSON, C. Feb. 24, 1949, No. 5076. [Class 17(iii)] A device for this purpose comprises a bracket A adapted to be fixed or pivotally mounted on a wall or other support from which depends two members B, D urged apart by spring pressure and carrying on- .pivots C\ E<SP>1</SP> at their lower ends toe and heel engaging members C, E for insertion in a shoe.
Patent GB-608272-A (GB)
Title: Improvements in or relating to process of making secondary polyhydroxyalkylaryl amines
IPC: C07C215/12
Filed: 1946-02-19
Abstract: Polyhydroxyalkylarylamines of the formula RNHCH2(CHOH)nCH2OH, where R is an aromatic radical of the benzene or naphthalene series and n is an integer of 2 or over, are prepared by the reduction by hydrogen of a mixture of the aromatic amine RNH2 and the aldonic acid lactone in an inert solvent in the presence of a noble metal catalyst at pressures of over 100 atmospheres and temperatures of less than 100 DEG  C.  Suitable lactones are those of ribonic gluconic xylonic and galactic acids.  The aromatic amine may be substituted by groups which do not react with the sugar acid lactones under the reaction conditions such as alkyl, alkoxy, hydroxy, carboxy and carbalkoxy groups, e.g. phenyl naphthyl, tolyl, xylyl, methoxyphenyl hydroxyphenyl carboxyphenyl and carbethoxy phenyl. Instead of an amine, a compound may be used which under the reaction conditions is reduced to the corresponding amine such as a nitro compound.  Organic solvents for the reaction include lower alcohols, dioxane and ethyl acetate.  Platinum oxide and palladium oxide are specified catalysts. The presence of up to 10 per cent of water is beneficial.  The reaction advantageously takes place in the presence of an alkali or a buffer of pH 8-11, but an acid may be present.  In examples: a mixture of d-ribono lactone and 1,2-dimethyl-4-amino benzene is reduced to give 1,2-dimethyl-4-d-ribitylamino benzone, (I) in the presence of potassium hydroxide, (II) in the presence of a buffer solution of pH 9, (III) in the presence of hydrochloric acid, and (IV) without addition.  Further examples describe the reduction of (V) d-glucono delta lactone and 1,2-dimethyl-4-aminobenzene, (VI) d-glucono delta lactone and p-toluidine, (VII) d-ribono lactone and 1,2-dimethyl-4-nitrobenzene, and (VIII) d-ribono lactone and 1,2-dimethyl-4-amino-5-carbethoxyaminobenzene.
Patent GB-248374-A (GB)
Title: A process of repairing air tubes and other articles made of vulcanised rubber by means of special self-vulcanising patches or lozenges
IPC: B29C73/10
Filed: 1926-02-24
Abstract: 248,374. Soc. Anon. des Pneumatiques Dunlop. Feb. 27, 1925, [Convention date]. Drawings to Specification. Repair devices. - Tyre tubes or other rubber articles are repaired by patches having the junction face formed of rubber containing a rapid vulcanizing accelerator but no sulphur; or a layer of such material is applied to the patch or the article to be repaired (or to both) before the patch is applied. The sulphur for effecting vulcanization is provided in all cases bv the patch or the article to be repaired. A suitable accelerator solution consists of 90 parts of raw rubber, 6 parts of zinc oxide, and 4 parts of isopropylxanthate of zinc or like active accelerator, this mixture being dissolved in 6 parts of benzene. The junction-rubber mixture may consist of 82 parts of rubber, 5 parts of zinc oxide, 3 parts of accelerator, and 10 parts of red antimony free from sulphur. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification in which rubber solution containing free sulphur is applied to the article to be repaired. This subject-matter does not appear in the Specification as accepted.
Patent GB-373652-A (GB)
Title: Improvements in or relating to closures for tin canisters and other receptacles
IPC: B65D51/16
Filed: 1931-02-19
Abstract: 373,652. Vacuum closures for cans. FRANCIS, J. H. E., Thames Ironworks, John Penn Street, London. Feb. 19, 1931, No. 5246. [Class 125 (iii).] A vacuum closure b for a canister &c. a has an orifice c on the inner face thereof, and an airtight covering d therefor, which is secured in position before the closure is assembled. The covering d is of a relatively soft or thin material so that it is readily pierceable by a pin &c.
Patent GB-869454-A (GB)
Title: Electrical inverter systems employing semiconductor devices
IPC: H02M7/5383
Filed: 1959-02-16
Abstract: 869,454. Transistor inverter circuits. WESTINGHOUSE ELECTRIC CORPORATION. Feb. 16, 1959 [Feb. 19, 1958], No. 5247/59. Class 40(6). In an inverter of the type in which a transistor is back coupled by a transformer to cause the transistor to become alternately conducting and non-conducting, the reversal of the conduction is effected by a series resonant circuit connected to the primary winding of the input transformer and to the supply source. In the circuit shown, assuming transistor 37 to be conducting, current flows from the positive of battery 3 through transistor 37 and then divides, part flowing in the upper part of the primary winding of an output transformer 11 and part flowing into a circuit comprising capacitor 75 primary winding 57 inductor 77 and the lower part of the primary winding of transformer 11, the latter current supplying current through windings 59 and 61 which maintain transistors 37 and 39 conducting and non-conducting respectively. Capacitor 75 thus charges in a resonant manner through inductor 77 to its maximum value and then commences to discharge resonantly causing the current in winding 57 to reverse and thus causing transistor 37 to become non-conducting and transistor 39 to conduct. The resonant discharge is followed by a resonant recharge until the capacitor is fully recharged in the opposite sense causing the conditions to again reverse. Thus the circuit oscillates at the frequency of the resonance circuit 75, 77. The sine wave voltage across winding 57 may be converted to square wave form by shunting the winding with resonant circuits tuned to harmonic frequencies. Specification 766,868 is referred to.
Patent GB-548834-A (GB)
Title: Improvements in curved surface light reflecting ornaments
IPC: B24B11/08
Filed: 1941-04-23
Abstract: 548,834. Cellulose derivative compositions and articles synthetic resins. MEYER, M. C. April 23, 1941, No. 5271.. Convention date, June 12, 1940. Drawings to Specification. [Classes 2 (ii) and 2 (iii)] [Also in Groups VII and XXIII] An ornamental object is produced by orienting faceted light-reflecting media such as pearl essence in a plastic body, as described in Specifications 243,558 and 247,717, [both in Class 70], the object having a curved surface comprising at least a first and second surface area, the faceted light-reflecting particles in the first area being generally parallel to the surface so that light is strongly reflected, and the particles in the second area being inclined to the direction of the surface so that substantially no light is reflected. The plastics may include resins, such as polymethacrylates and acrylates, formaldehyde condensation products and vinyl compounds, and cellulosic derivatives including cellulose esters such as cellulose nitrate and acetate and cellulose ethers such as ethyl and benzyl cellulose. Polymethyl methacrylate sold under the trade name " Lucite " is especially suitable because of its index of refraction of about 1.5, its excellent transmission of light and its low light absorption. A mix is formed comprising the monomer of methyl methacrylate and a dye previously prepared so as to be miscible therewith, and to this mix is added pearl essence. The liquid is poured into a mould of circular cross section. The monomer is then completely polymerized to solid form, the orientation of the particles being effected during the polymerization and the particles being set in their properly oriented positions concentric to the long axis of the cylinder. In using other mouldable materials the orientation may be effected by extrusion, stretching or electrical means. For use in rings, brooches, studs and the like, the plastic is cut en cabochon so that the area where the particles lie substantially parallel extends centrally over the periphery of the object with two dark areas at the sides. Necklaces are bored through the original axis of the rod, so that the band of light reflecting surface is concentric around the cord on which the spheres are threaded. Metallic faceted particles, faceted pigments or light reflecting media with faceted surfaces generally, may be substituted for the pearl essence.
Patent GB-606947-A (GB)
Title: Multi-stage centrifugal pump
IPC: F04D1/06
Filed: 1946-02-20
Abstract: 606,947. Centrifugal pumps. HARLAND ENGINEERING CO., Ltd., and ANDERSON, H. H. Feb. 20, 1946, No. 5291. [Class 110 (i)] The inlet and outlet connections of a multistage centrifugal pump are formed in a massive end cover 12 which closes the open end of a barrel 11 enclosing the pump stages 10. The first pump stage is secured to the end cover 12 by bolts 17 and each other stage is secured to the preceding one by bolts 16. The final discharge passes around the stages to the channel 14a leading to the outlet connection.
Patent GB-372846-A (GB)
Title: Improvements in and connected with dust-traps for gas burners
IPC: F23D14/48
Filed: 1931-02-19
Abstract: 372,846. Dust traps for gas burners. BROMLEY, H. H., 67, Farringdon Road, London. Feb. 19, 1931, No. 5309. [Class 75 (i).] In a dust-trap comprising a hollow member a upstanding from the bottom of a casing c, depending from a supply pipe d, and provided with lateral ports f below a deflecting conical or like cap b and a screwed extension i for the attachment of the burner, the member a is provided with an enlarged screwthreaded portion e for connection with the casing and an external flange h, which may be of hexagonal shape or have a milled edge, for facilitating assemblage and disengagement of the parts.