baber/WOPTO huggingface dataset:
Patent GB-919330-A (GB)
Title: Production of polycarbonates
IPC: C08G64/40
Filed: 1959-06-09
Abstract: Solid polycarbonates are obtained from a solution thereof in an organic solvent by (1) adding to the solution a non-solvent for the polycarbonate to precipitate the latter in the form of a gummy or putty-like non-grindable mass, (2) allowing this mass to age to a grindable form and (3) grinding the aged mass.  Grinding may be effected by (a) agitating the liquid medium or (b) first separating the precipitate from the liquid medium (e.g. by decantation, centrifugation or filtration) and then grinding the solid (e.g. in a mortar and pestle or a ball mill).  A batch or continuous process may be adopted.  The solvent used may be a partially halogenated aliphatic hydrocarbon having 1-4 carbon atoms, beta,beta1-dichloroethyl ether, a nitroalkene or a light alkyl ether. The non-solvent may be an aliphatic mono- or di-hydric alcohol, an aliphatic hydrocarbon containing 5-20 carbon atoms, carbon tetrachloride, benzene or a di- or tri-chlorobenzene.  The polycarbonate may be that of a dihydric phenol and/or a dihydric alcohol.  In examples bisphenol-A was phosgenated in the presence of sodium hydroxide and methylene chloride, the organic phase was washed with water and solid polycarbonate was precipitated from the methylene chloride with n-heptane, n-hexane, methanol or allyl alcohol.
Patent GB-379717-A (GB)
Title: Improvements in or relating to alloy steels
IPC: C10M143/00
Filed: 1932-11-12
Abstract: Lubricating oils are made more viscous, more stable to heat and air, and of better temperature-viscosity curve by incorporating one or more of the following polymerized hydrocarbons having a molecular weight above 800: polymerized indene, polymerized styrene, cyclo-rubber, hydrogenated polymerized indene or styrene, hydrogenated rubber or cyclo-rubber, hydrogenated polymerized diolefines such as butadiene or isoprene; 0,5-30 per cent by weight is a suitable addition.  The polymerized hydrocarbon may be formed in situ by heating styrene, indene, or other polymerizable hydrocarbon in the lubricating oil.  The hydrogenation may also be carried out in situ, maybe simultaneously with the polymerization.  In examples: (1) 1, 2, and 4,5 per cent of styrene polymerized at 100 DEG  C., and 1 and 2 per cent of styrene polymerized as an emulsion are added to different portions of a lubricating oil obtained by alkylating naphthalene by lower olefines; (2) 2-5 per cent of rubber hydrogenated in presence of nickel while dissolved in cyclohexane is added to spindle oil; (3) 3 kgs. of styrene and 100 kgs. of spindle oil are heated together for 20 hours at 150 DEG  C.; (4) 2 kgs. of solid polymerized styrene obtained by heating styrene to 100 DEG  C. for several hours or by polymerizing at ordinary temperature an emulsion of styrene in presence of accelerators such as hydrogen peroxide or benzoyl peroxide is added to lubricating oil.ALSO:Lubricating oils are made more viscous, more stable to heat, and air, and of better temperature viscosity curve by incorporating one or more of the following polymerized hydrocarbons having a molecular weight above 800: polymerized indene, polymerized styrene, cyclo-rubber, hydrogenated polymerized indene or styrene, hydrogenated rubber or cyclorubber, hydrogenated polymerized diolefines such as butadiene or isoprene; 0,5-30 per cent by weight is a suitable addition.  The polymerized hydrocarbons may be formed in situ, by heating styrene, indene, or other polymerizable hydrocarbon in the lubricating oil.  The hydrogenation may also be carried out in situ maybe simultaneously with the polymerizations. In examples: (1) 1-2, and 4,5 per cent of styrene polymerized at 100 DEG  C. and 1 and 2 per cent of styrene polymerized as an emulsion are added to different portions of a lubricating oil obtained by alkylating naphthalene by lower olefines; (2) 2-5 per cent of rubber hydrogenated in presence of nickel while dissolved in cyclohexane is added to spindle oil; (3) 3 kg. of styrene and 100 kg. of spindle oil are heated together for 20 hours at 150 DEG  C.; (4) 2 kg. of solid polymerized styrene obtained by heating styrene to 100 DEG  C. for several hours or by polymerizing at ordinary temperature an emulsion of styrene in presence of accelerators such as hydrogen peroxide or benzoyl peroxide is added to lubricating oil.
Patent GB-537973-A (GB)
Title: Improvements in, and connected with, the welding of tubular or cylindrical articles
IPC: B23K11/36
Filed: 1939-12-12
Abstract: 537,973. Welding tubes, hollow-ware and like cylindrical articles. BRITISH FEDERAL WELDER & MACHINE CO., Ltd., and WOLTON, H. W. Dec. 12, 1939, Nos. 32014 and 32856. [Classes 83 (ii) and 83 (iv)] In welding articles such as tubes, cylinders and like hollow articles from parts of concave cross-section, longitudinal stiffening means are secured to and within each of the parts adjacent their longitudinal edges so as to reinforce the longitudinal edges during electric welding thereof to prevent bending or warping of the parts. Angle irons b with flanges curved to fit the semi-circular parts a, a<SP>1</SP> may be projection welded or soldered near the edges, which are maintained in register by bracing devices which may consist of grooved blocks c<SP>1</SP>, c<SP>2</SP> forced outwardly, preferably against the action of springs, by wedges c, or may be moved by links d operated by pushing inwards the central arm d<SP>1</SP>. The stiffeners may be permanently fixed to the parts or may be removed after welding of the parts. In a modification frames with flanges e2 and transversals e<SP>1</SP> may be projection welded to the parts a, a<SP>1</SP> prior to welding the parts together. The parts may be formed with closed ends. The stiffeners are of such a distance from the edges that they are still spaced apart after welding.
Patent GB-473738-A (GB)
Title: Marking tags for animals
IPC: A01K11/00
Filed: 1936-11-23
Abstract: 473,738. Seals. KETCHUM MANUFACTURING CO., Ltd. Nov. 23, 1936, No. 32021. Convention date, Jan. 8. [Class 146 (ii)] An identification seal for animals comprises a strip 10 formed with a tapered and preferably weakened tongue 11 at one end, and a housing 12 for the tongue at the opposite end, the housing having an opening 16 and a suitably shaped wall 15 to deform the tongue when the latter is inserted into the housing, and a locking-bar 20 integral with the strip and extending across the opening 16 of the housing around which the tongue 11 may curl when deformed. The housing 12 is preferably formed from the strip 10 by means of a die which 'cuts and presses the strip to form the housing in two sections 17, 18 which are spaced apart, and the narrow integral 'locking- bar 20, the sections then being pressed together so that they either meet at the base at 19 or leave a narrow opening.
Patent GB-685929-A (GB)
Title: Improvements in or relating to optical objectives
IPC: G02B13/18
Filed: 1949-12-14
Abstract: 685,929. Optical objectives. COOK, G. H., and TAYLOR, TAYLOR & HOBSON, Ltd. Nov. 16, 1950 [Dec. 14, 1949], No. 32093/49. Class 97 (i). An optical objective connected for spherical and chromatic aberrations, field curvature, coma, astigmatism and distortion comprises two divergent meniscus components, each consisting of a convergent and a divergent element, located between two simple convergent outer components and is characterized in that the four convergent elements of the objective are all made of materials having mean refractive index between 1.35 and 1.50 and Abbe V number between 70 and 40 and in that at least one of the air exposed surfaces of the objective is aspherical and of such a shape that at any radial distance from the optical axis the thickness of the associated element is slightly greater than it would be with a true spherical surface whose curvature is the same as that at the vertex of the aspherical surface. Preferably the surfaces R 3  and R 8  are made a,spherical and the extra thickness of each element due to the asphericity does not exceed 0.03 times the radial distance mentioned. The refractive index of the divergent element of each meniscus exceeds that of the convergent element thereof by between 0.05 and 0.15 whilst the AbbÚ V number of the convergent element exceeds that of the divergent element by between 30 and 55. Preferably, the relative partial dispersion for any two wavelengths of the material used for one element of the objective is approximately the same as those for the same two wavelengths of the materials used for the other elements of the objection and the material used for each convergent element may have relative partial dispersions substantially greater than those of usual glasses having similar AbbÚ V-numbers. Thus, the convergent elements may all be made of crystalline calcium fluoride while the divergent elements are made of flint glass. Preferably also, S<SP>2</SP> lies between 0.12F and 0.20F, where F is the equivalent focal length and D 2 +D 3  and D<SP>4</SP>+D<SP>5</SP> are equal and lie between 0.16F and 0.26F. The surfaces R<SP>5</SP> and R<SP>6</SP> are preferably dispersive and the sum of the powers thereof lie between 4 and 6 times the equivalent power P of the objective. The sum of the powers of the surfaces R 2  and R<SP>9</SP> may be collective and lie between 0.4P and P, and the sum of the powers of the two simple lenses may lie between 1.8P and 2.6P. Specification 658,349 is referred to.
Patent GB-1495373-A (GB)
Title: Quaternary halides of mink oil amides
IPC: A61K31/16
Filed: 1976-08-02
Abstract: 1495373 Quaternary halides of mink oil amides VAN DYK & CO Inc 2 Aug 1976 [16 Sept 1975] 32154/76 Heading C2C [Also in Division A5] Novel emollients and hair-conditioning agents have the formula where R is the residue of mink oil fatty acids, R<SP>1</SP> is methyl or ethyl and X is chlorine or bromine. The compounds are made by (1) reacting mink oil with gamma dimethyl (or diethyl or methyl ethyl) amino propylamine to give a compound of formula and (2) quaternizing this product with ethylene chlorhydrin or ethylene bromhydrin in a solvent mixture of water and propylene glycol.
Patent GB-193958-A (GB)
Title: Improvements in signalling apparatus for mines and the like
IPC: E21F17/18
Filed: 1921-12-01
Abstract: 193,958. Harvey, G. M. Dec. 1, 1921. Thermionic valve circuits.-In order to get rid of self-induction in signalling circuits for mines and collieries and so reduce sparking, a thermionic valve A is used as a non-inductive relay. Two bare wires G are led throughout the portion of the mine from which signals are to be received and one of them is connected at the receiving station to a battery E the other pole of which is connected through the filament B of a thermionic valve to the far end of the other bare wire by means of a third wire K. The anode and grid of the valve are connected to the battery through the coils L of a relay. When the bare wires G are brought into contact, the filament glows and a current sufficient to operate the relay flows through the valve. A bell O is operated by the relay and the glowing of the filament also acts as a visual signal. The filaments of valves at other receiving stations may be in circuit with the wire K. and the valve, relay, and bell at each station may be enclosed in explosion-proof cases. Specifications 151,118, [Class 40 (iv), Telephones &c.], and 168,394 are referred to.
Patent GB-216257-A (GB)
Title: Improvements in boiler feed water systems
IPC: B01D19/00
Filed: 1922-11-24
Abstract: 216,257. Morison, D. B. Nov. 24, 1922. Feed-water, heating.-Relates to feed-water supply systems comprising means for the deaeration of the feed-water, wherein de-aeration is effected by raising the water to boiling temperature by the injection of steam or other heating fluid below the surface of the water, as described in Specifications 173,301, [Class 46, Filtering &c.], and 199,748. A supply system according to the invention comprises a condenser, a deaeration vessel into which the condensate is delivered continuously, means for injecting the make-up beneath the surface of the water in the vessel, and means for so regulating the resistance between the condenser and the vessel as to maintain such pressure in the vessel that the heat of the make-up is sufficient to boil the water. The de-aeration vessel 2 is maintained under reduced pressure by connecting it to the condenser 1 by a pipe 5 of predetermined crosssection or fitted with a valve 6 or its equivalent. The perforated pipes 7 through which the makeup is injected, either in the form of steam or water, are arranged as described in Specification 214,328. The hot water from evaporator coils may be used as make-up. The supply of makeup may be automatically controlled by a valve operated in accordance with the quantity of water to be treated in the de-aeration vessel. The condensate may be heated before entering the deaeration vessel bv waste steam in a surface heater.
Patent GB-382097-A (GB)
Title: Improvements in or relating to fabrics for use in the manufacture of double collars or cuffs and double collars or cuffs made therefrom
IPC: A41B5/00
Filed: 1931-11-20
Abstract: 382,097. Collars and cuffs; woven fabrics. HARTLEY, H., Kinnaird House, Pall Mall East, London. Nov. 20, 1931. No. 32256. [Class 141.] In the manufacture of double collars and cuffs, a fabric is employed intermediate in character between a single-ply fabric and a multi-ply fabric said fabric comprising two layers of weft threads 1, 2 spaced apart from one another but united together by binder warp threads 3. The region of folding a of the fabric may have thinner warp 3 or may be produced by the omission of certain of the warp threads in a narrow portion. The whole of a portion to one side of a predetermined line may have certain of the warp threads omitted, the weft threads being caused to lie in the same plane. The warp threads in the fold line may be more widely spaced than in the remainder of the fabric.
Patent GB-428820-A (GB)
Title: Improved variable composition electrical resistances and method of manufacturing the same
IPC: H01C10/00
Filed: 1934-11-09
Abstract: 428,820. Resistance coatings and deposits; variable resistances. PREH, J., (trading as PREH JR. FABRIK ELEKTROTECHNISCHER BEDARFSARTIKEL), Neustadt, Saale, Germany. Nov. 9, 1934, No. 32366. Convention date, Nov. 11, 1933. [Class 37] Straight or annular variable electrical resistances having continuously or discontinuously curved resistance characteristics are made by stamping from a strip which consists of, or is covered by, compositions a, b, c of different specific conductivities or of the same conductivities but different thicknesses. The compositions may be applied to the strip by one or more atomizers, which may be adjusted to give a gradual passage in resistance from one zone to the next. During the application of the compositions, part of the strip may be covered by a movable or stationary stencil. Compositions of different specific conductivity may be made by varying the conductors or binding agents employed.
Patent GB-324881-A (GB)
IPC: C06F1/08
Abstract: 324,881. Aktiebolaget Siefvert & Fornander. April 13, 1929, [Convention date]. Addition to 290,187. Matches.-The filled collecting boxes when moved to one side for emptying as claimed in the parent Specification are received by a device supporting one or more sets of empty boxes for ready substitution for the filled boxes. The carriage 33 containing the boxes being filled at 7 is mounted on rails 17 carried by a frame pivoted at 18. When the boxes are filled this frame is tilted back to the dotted line position so as to bring the rails into alignment with similar rails 20 on a rotary table 23. The carriage 33 may now be run on to the rails 20 and the table turned so as to position in line with the rails 17 another set of rails 21 supporting a similar carriage 34 containing empty boxes 35 which may thus be readily transferred to the machine. The table may be replaced by a frame rotating on a horizontal axis or capable of vertical displacement. Specification 294,231 is referred to.
Patent GB-1222252-A (GB)
Title: Photoconductive compositions
IPC: G03G5/06
Filed: 1968-07-08
Abstract: 1,222,252. Photoconductive composition. A.B. DICK CO. 8 July, 1968 [18 July, 1967], No. 32549/68. Heading HlK. A photoeonductive composition comprises an acceptor compound in the form of a substituted or unsubstituted 9-dicyanomethylene fluorene and a donor compound in the form of an organic photoconductor which forms a charge transfer complex with the acceptor compound. The organic photoconductor may be polyvinylcarbazole, 2,5-bis-(4-diethylaminophenyl) - 1,3,4- oxadiazole or 2,2<SP>1</SP>-dinaphthylamine. The acceptor compound may be 9-dicyanomethylenefluorene itself or may be substituted by one or more nitro, cyano or carboxyl groups. A filler or pigment such as CaC0 3 , MgSi0 4 , BaS0 4 , ZnO, TiO a , clay or powdered polythene may be included. Organic binders such as P.V.C., copolyvinyl chloride/acetate or an epoxy or coumarone-indene resin may be used. Various fluorescent brightening agents may also be added. An electrophotographic plate is formed by coating the composition on paper.
Patent GB-654137-A (GB)
Title: Improvements in or relating to electrical signalling systems
Inventor: BAKER GEORGE THOMAS
IPC: H04M15/08
Filed: 1948-12-17
Abstract: 654,137. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Dec. 17, 1948, No. 32648. Drawings to Specification. [Class 40 (iv)] In a code transmission system the timing of the code elements is controlled by an electronic impulse generator and one or more serially related frequency dividing stages. The invention is described with reference to a forward marking line identification system as described in Specification 614,177 in which each digit is represented by the presence or absence of 750 c.p.s. tone in different combinations in four intervals in the transmission of a 600 c.p.s. spacing tone. Whereas in the prior Specification the contact controlling the application of tones to the line is a vibrator contact and relay frequency division circuits are used to count the number of pulses and also the number of digits sent, in the present Specification the vibrator contact is replaced by a relay contact controlled by a multivibrator and electronic circuits are used for the first two stages of frequency division where the pulse frequency is still high. The receiver contains equipment, common to a number of recording devices, in which the spacing pulses are fed to a chain of frequency dividers the first two of which are electronic and the remainder of the relay type. This chain controls the registration of the digits alternately on two relay sets, each digit being then fed to a recording unit from one relay set whilst the other relay set receives the succeeding digit. Specification 539,823 also is referred to.
Patent GB-436419-A (GB)
Title: Improvements in and relating to electron discharge devices
IPC: H03F1/16
Filed: 1934-11-14
Abstract: 436,419. Condensers. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. Nov. 14, 1934, No. 32797. Convention date, Nov. 14, 1933. [Class 38 (ii)] [See also Group XL] Relates to the construction and control of the neutralizing condensers used in a highpowered amplifier of the push-pull type. The main tuning condensers consist of a pair of earthed cylinders 9, 10, which co-operate with a second pair of cylinders 3, 4 containing the cooling-means for the anodes of the valves 1, 2. The tuning capacity is adjusted by raising or lowering the platform 11 supporting the cylinders 9, 10 through screw gearing 12 controlled by a knob 17. The neutralizing- condensers consist of plates 7, 8 mounted on the cylinders 3, 4 and co-operating with plates 21, 22 carried on a moving bar 27. The effective neutralizing capacity is varied by raising or lowering the bar 27 by means of links 30 arranged for independent movement at each end of the bar.
Patent GB-740373-A (GB)
Title: Improvements in metallising gun
IPC: B05B7/18
Filed: 1952-12-29
Abstract: 740,373. Spray-producers &c. BRENNAN, J. B. Dec. 29, 1952, No. 32849/52. Class 69 (3). Metal is fed as a wire 13 through a gun which includes a high-frequency conical-shaped induction coil 26 for melting the end of the wire, and passages 36, 37 for a carrier gas. The latter flows through circumferentially-spaced ports 38 and between the wire feed chamber wall 39 and a conical cap 24. An additional gas may be fed through passages 22, 21 to assist the spraying or, alternatively, this gas may be combustible to assist the melting operation. A further induction coil 100 may be provided. Specification 483,517 is referred to.
Patent GB-617762-A (GB)
Title: Improvements relating to electrical slip-ring assemblies
IPC: H01Q3/02
Filed: 1946-11-06
Abstract: 617,762. Collectors. SHAND, G., BLETCHER, T. J. and METROPOLITANVICKERS ELECTRICAL CO., Ltd. Nov. 6, 1946, No. 32983. [Class 38 (i)] A slip-ring assembly consists of metal contact rings 1 and insulating rings 5 mounted on a central stem. The rings are provided with circular rows of holes 2, 6 and each insulating ring is provided with a stepped flange 9, 10 surrounding the central opening and on each side with a projecting pin or spigot 8 which engages in a hole in the adjacent metal ring. The part 9 of the flange passes through the central opening of the adjacent metal ring, the part 10 entering a recess in the following insulating ring. A conductor 12 is secured in one of the holes in each metal ring and passes through the holes in the rings below it.
Patent GB-634100-A (GB)
Title: Improvements in thermostatic diaphragm-actuated expansion valves for compression refrigerating apparatus
IPC: F25B41/06
Filed: 1946-11-06
Abstract: 634,100. Thermally-actuated valves. CARBA AKT.-GES., and EICHMANN, T. Nov. 6, 1946, No. 33006. [Class 135] - A thermostatic, diaphragm-actuated, expansion valve for regulating the flow of refrigerant to the evaporator of a compression-refrigerating apparatus is characterized by the provision of a movement-amplifying transmission member, e.g. a bell-crank lever, between the diaphragm and the valve. As shown, a casing 1 having a liquid refrigerant inlet 17 and an outlet 19 to the evaporator houses an adjustable spring- loaded needle-valve 8. The valve 8 is carried on the longer arm of a bell-crank lever 7, the shorter arm of which supports a displaceable member 4 which coacts with the diaphragm 3. The space above the diaphragm is connected by a pipe 15 to a thermal element responsive to temperature changes in the compressor suctionpipe, which changes effect movement of the diaphragm and operation of the valve 8 to vary the flow of refrigerant.