baber/WOPTO huggingface dataset:
Patent GB-847571-A (GB)
Title: Improvements in or relating to circuit arrangements for limiting modulated electrical signal oscillations
IPC: H03G11/06
Filed: 1959-01-02
Abstract: 847,571. Transistor limiter circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 2, 1959 [Jan. 7, 1958], No. 207/59. Class 40(6). A transistor circuit for limiting a modulated carries signal comprises a parallel tuned circuit to which the signal is applied and in parallel with which the emitter/collector path of a transistor is connected, a tap on the coil of the tuned circuit is connected to the base of the transistor via a parallel resistorcapacitor network which passes the modulation frequency of the signal. The Figure shows a limiter circuit, for example for use in a frequencymodulated radio receiver, in which the signals are applied to a parallel resonant circuit 1 in parallel with which there is connected a symmetrical transistor 2. The centre tap 3 of that portion of the coil of the resonant circuit across which the transistor 2 is connected is applied via a resistor-capacitor network 4, 5 to the base of the transistor, the time constant of the network being such that the modulation frequencies of the signal are transmitted, and a voltage corresponding approximately to the average signal amplitude is produced across the filter 4, 5. If the amplitude of the voltage across circuit 1 increases rapidly the filter 4, 5 is unable to follow this rapid increase hence during the positive peak of the signal the upper electrode of the transistor 2, and during the negative peak the lower electrode, are driven positive with respect to base so that heavy current passes through the transistor and tends to damp the signal fluctuations.
Patent GB-1040264-A (GB)
Title: Improvements in high voltage power supply circuits
IPC: H01F38/06
Filed: 1964-01-02
Abstract: 1,040,264. Converting. RANK XEROX Ltd. Jan. 2, 1964 [Jan. 4, 1963], No. 230/64. Heading H2F. A biased alternating voltage is derived from a circuit comprising a constant voltage transformer T having a tapping TS-5 connected to earth and a tapping TS-1 connected to an output terminal T through a capacitor C-1, this capacitor being charged through a rectifier SR-1 connected to a third tapping TS-3, so that the output at T is a waveform which varies about a mean direct voltage level. A second identical waveform is obtained at terminal C and a negatively biased waveform is obtained from a similar circuit TS-2, TS-4, SR-2, R-2 at - PC. A current limiting resistor R2 is included in this circuit. A simpler arrangement (Fig, 4, not shown), which does not include a constant voltage transformer is disclosed.
Patent GB-1381736-A (GB)
Title: Method of cementing
IPC: C04B28/32
Filed: 1972-01-04
Abstract: 1381736 Cementing; magnesia cement K M FINZEL 4 Jan 1972 321/72 Heading C3N A method of cementing comprises taking a first component constituted by a mixture of magnesia and filler material and a second component constituted by an aqueous solution of magnesium, either (1) mixing the first and second components to form a slurry and then subjecting the slurry to external heating, or (2) subjecting the second component to external heating and then mixing the first and second components to form a slurry, wherein the weight ratio of magnesium chloride to magnesia is 1 : 2-1 : 4, and applying the slurry at an elevated temperature to a surface to be treated. An elevated temperature is defined as a temperature above 20‹ C. and up to about 35‹ C. The magnesia may be in the form of magnesite. In step (1) the slurry is preferably heated by pulse heating. The filler used in the specific example is a mixture of quartz and wood chips (sawdust). Corn cobs may also be used.
Patent GB-469588-A (GB)
Title: Improvements in or relating to electric devices in which a picture set up by electrons is projected on a projection surface
IPC: H01J31/50
Filed: 1937-01-05
Abstract: 469,588. Discharge apparatus. NAAM. LOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Jan. 5, 1937, No. 326. Convention date, Jan. 8, 1936. [Class 39 (i)] In devices having a cathode surface 4 emitting a family of electron beams of different density forming a picture set up by electrons and a picture surface 6 on to which the electron beams are projected, the axes of the surfaces 4, 6 are at an angle. such as 90‹, and a curved magnetic focusing field bends aside as a whole the family of electron beams emitted by the surface 4, away from the axis of the surface 4 and on to the surface 6. The magnetic field may be formed by one or more coils or permanent magnets, two coils being shown one 9 coaxial with the surface 6, and one 8 with its axis below that of the surface 4. Light from an object 11 can thus be projected normally on to the front of the surface 4, and a picture produced by fluorescence at the surface 6 can be viewed normally from the front, there being no need to make the surfaces 4, 6 transparent. The family of electron beams may also be produced by a picture in infra red or ultra-violet rays falling on a uniformly sensitive surface 4, or by a uniformly illuminated photo-electric surface or uniformly heated thermionic surface to give a picture of the local sensitiveness of the emitting surface. Instead of fluorescing, the surface 6 may be a photographic plate recording the picture or may emit secondary electrons to form an intensified electron image. The surface 4 is a silver layer on the wall of the tube, and is sensitized with caesium. In a modification, the surfaces 4, 6 are interchanged and electrons from the surface 4 are accelerated by ring anodes which may be above the potential of the surface 6. Dimensions of the bulb 1 and coils 8, 9 are specified.
Patent GB-1146101-A (GB)
Title: Improvements in or relating to organotin sulfides
IPC: C08K5/58
Filed: 1967-01-03
Abstract: 1,146,101. Organotin sulphides. M & T CHEMICALS Inc. 3 Jan., 1967 [3 Jan., 1966], No. 338/67. Heading C2J. The invention comprises organotin sulphides of the general formula {[NC(CH 2 ) m ] n Sn} y S z , in which m is an integer at least 2 and preferably less than 5, n is an integer 1 to 3, y is 1 or 2, z is 1 or 3 and the values of n, y and z are such that the tin atom retains a tetravalent structure. They may be prepared by reacting an alkali metal sulphide or alkali metal hydrogen sulphide with an organotin halide where X is chlorine, bromine or iodine; the organotin sulphides being recovered from the reaction mixture by filtration if they are solids or by distillation to remove solvent if they are liquids. A preferable alternative preparation comprises adding a calculated excess of alkali metal sulphide or alkali metal hydrogen sulphide to the organotin halide followed by acidification, preferably with acetic acid, to form the organotin sulphide. Specific examples given, in which (NCCH 2 CH 2 ) 2 SnS, [(NCCH 2  CH 2 ) 3 Sn] 2 S and (NCCH 2 CH 2 Sn) 2 S 3  are prepared, illustrate both methods of preparation.
Patent GB-933158-A (GB)
Title: New 5-nitrofuryl 2-methylidene hydrazides of diazine-carboxylic acids and process for their manufacture
IPC: C07D237/24
Filed: 1961-01-04
Abstract: The invention comprises 5-nitrofuryl-(2)-methylidene-hydrazides of monocyclic sixmembered diazine carboxylic acids, the ring p  nitrogen atoms of which are separated by at most 1 carbon atom; their salts and quaternary ammonium derivatives; and a process for their manufacture by condensing a corresponding carboxylic acid hydride with a 5-nitrofuran-2-aldehyde: in particular compounds <FORM:0933158/IV(a)/1> in which R represents an alkyl, cycloalkyl, hydroxyalkyl or tertiary aminoalkyl group, the alkylene chain containing 2 to 4 carbon atoms, or a phenyl or pyridyl group and R1 represents a hydrogen atom or a hydroxyl group; also compounds <FORM:0933158/IV(a)/2> in which -N=B represents a lower (i.e. 1-7 carbon) dialkylamino, pyrrolidino, piperidino, morpholino or piperazino group and n is 2 or 3: also 5-nitrofuryl-(2)-methylidine-hydrazides of an acid <FORM:0933158/IV(a)/3> in which R, R1 and R2 each represents a hydroxyl, alkoxy or tertiary aminoalkyl group, or a free or substituted amino group, a hydrogen or halogen atom or a lower alkyl group, or of an acid <FORM:0933158/IV(a)/4> in which R, R1 and R2 each represents a hydrogen atom or a lower alkyl group. Pharmaceutical preparations comprise the above compounds in admixture or conjunction with a pharmaceutically suitable excipient. Veterinary medicines and animal feeds are mentioned. Solid (tablets, dragees, capsules) or liquid (solutions, suspensions, emulsions), organic or inorganic, vehicles are mentioned for topical, oral or parenteral administration.  The compounds are antimicrobial agents. Specification 933,159 is referred to.
Patent GB-824527-A (GB)
Title: Improvements in or relating to vitreous enamel frits
IPC: C03C8/12
Filed: 1958-01-06
Abstract: 824,527. Vitreous enamel frit. DU PONT DE NEMOURS & CO., E. I. Jan. 6, 1958 [Jan. 7, 1957], No. 474/58. Class 56. A vitreous enamel frit having a maturing temperature of 490 to 550‹C. and suitable for the enamelling of aluminium and aluminium alloys at least 70% of which consists of by weight 22 to 35% TiOz, 14 to 29% SiO 2 , 17 to 26% Na 2 O and 1 to 3% Li 2 O, said frit being either free from the following constituents or containing one or more of them in amounts of less than 0À1 % NiO, 0À1% MaO, 1À0% CoO, 4À0% Al 2 O 3 , 11À0% B 2 O 3 , 2À1% ZnO, 30À0% BaO, 4À0% CaO, 4À0% ZrO 2 . 0À5% PbO and 11À0% KzO. Any tendency for corrosion to be produced during firing is prevented by adding to the frit composition before melting 1 to 11 % and preferably 1 to 5% Sb 2 O 3 , depending upon the alkali content of the frit, the amount of chromate pre-treatment and the particular aluminium surface being treated. The components are mixed, heated to 900-1200‹C. and then poured into water to form a frit which is dried at 50‹C. and then ground with or without the addition of pigments, specifying agents, dispersing and bonding agents. The surface to be treated is cleaned, pretreated with chromate and fired at 480-580‹C. for 2-30 minutes. After cooling the surface is treated with the enamel composition by e.g. spraying, dipping, stencilling or brushing and is then fired at 490-550‹C. Specifications 634,655, 642,288 [Group XXVI] and 721,858 are referred to.
Patent GB-882583-A (GB)
Title: Safety explosives
IPC: C06B23/04
Filed: 1958-01-06
Abstract: 882,583. Explosive compositions. POUDRERIES REUNIES DE BELGIQUE S.A. Jan. 6, 1958 [Jan. 5, 1957; Feb. 23, 1957], No. 476/58. Class 9(2). A gelatinous, semi-gelatinous or pulverulent explosive composition comprises a liquid explosive nitric ester, a gelatinising agent (guncotton or silica), an oxidising salt (sodium or ammonium nitrate) a flame-inhibiting salt (ammonium or sodium chloride) and 0.75% to 3.0% based on the total weight of the composition, of a combustible agent comprising a mixture of calcium stearate and carboxymethyl cellulose. Other additional components may include solid explosives such as trinitrotoluene or hexogen.
Patent GB-546472-A (GB)
Title: Temperature compensators for pressure actuated indicators
IPC: G01L19/04
Filed: 1941-01-13
Abstract: 546,472. Pressure gauges. BENDIX AVIATION CORPORATION. Jan. 13, 1941, No. 484. Convention date, March 7, 1940. [Class 106 (ii)] A pressure-responsive device or indicating instrument such as a rate of climb indicator, aneroid altimeter, manifold pressure gauge or air-speed indicator is compensated for temperature changes by the action of a material such as powdered carbon which absorbs or liberates gases in response to temperature variation. As shown applied to a rate of climb indicator, the interior of the pressure-responsive element 14 is connected by a tube 60 to a chamber 57 containing powdered carbon 59 and a further tube 24 communicates with the atmosphere by way of a coupling chamber 25 and outlet 48. The casing 38 is substantially sealed but communicates with the outside atmosphere by porcelain diffusing tubes 53 (one only shown) as described in Specification 507,991. In operation, with an increase in altitude equalization of pressure within the casing 38 is delayed by the porcelain diffusing tubes, and the consequent difference of pressure inside and outside the pressure-responsive element 14 adjusts a pointer 36 to indicate the rate of climb or descent. If a change of temperature occurs (the altitude remaining constant) the pressure of air within the casing 38 changes owing to the slow escape through the diffusing tubes, and the carbon 59 being subjected to the same change of temperature adsorbs or liberates air to an extent sufficient to equalize the pressures within and without the pressure-responsive element thus avoiding a false reading. In a modified arrangement, the carbon chamber 57 is connected to the interior of the pressureresponsive element 14 by way of the coupling chamber 25. Specification 530,171 also is referred to.
Patent GB-211655-A (GB)
Title: Improvements in the construction of nut blank forming machines
IPC: B21K1/64
Filed: 1923-01-09
Abstract: 211,655. Hollings, E. Jan. 9, 1923. Forging-machines.-The frame of a nut-blank forging-machine comprises a main member 1 resting on feet 2 and a back stand having one foot 4 resting on the ground and two feet 3 secured to the main member. Reinforcing ribs 5, 7 are provided and the caps 6 are lipped over to tie the bearing supports together.
Patent GB-868497-A (GB)
Title: Improvements in or relating to staple fibres of linear co-polyesters
IPC: D01F1/10
Filed: 1959-01-08
Abstract: High-tenacity staple fibres are made from a polymer of ethylene terephthalate in which at least 90% of the recurring structural units are -OC(p)C6H4,CO,OCH2,CH2,O- and which has a "relative viscosity" of 14,0 to 17,0 unless part or all of the remaining structural units contain sulphonate groups, in which case the relative viscosity of the polymer is (14,0+0,75x) to (17,0+0,75x), where x is the mole percentage (preferably not exceeding about 3,5 mole per cent) of sulphonate groups in the copolymer.  The fibres are formed by melt-spinning the polymer, drawing the filaments so obtained, and cutting the drawn filaments into staple lengths.  "Relative viscosity" is defined as the ratio of the viscosity of a 10% solution of the polymer in a mixture of 10 parts of phenol and 7 parts of 2, 4, 6-trichlorophenol (by weight) to the viscosity of the phenol-trichlorophenol mixture per se at 25 DEG C., the viscosities being determined in an Ostwald-Fenske viscometer which has been standardized by means of aqueous solutions of glycerol of known absolute viscosities.  The term "polymers of ethylene terephthalate" is defined as including ethylene terephthalate copolymers containing residues of other dicarboxylic acids and/or other glycols, e.g. glycols of the series HO(CH2)xOH, where x is an integer from 2 to 10, dibasic acids of the series HOOC(CH2)yCOOH, where y is 0 or an integer from 1 to 8, hydroxy acids of the series HO(CH2)zCOOH, where z is an integer from 1 to 9, and analogous compounds in which the radicals (CH2)x, (CH2)y and (CH2)z are replaced by radicals of the type (CnH2nO)a, where n is an integer from 2 to 4 and a is an integer from 1 to 300.  Other polyester linking units may be derived from isophthalic acid, phthalic acid, naphthalic acids and bibenzoic acids.  The above polymers may be modified to include sulphonate groups to increase their affiinity for dyes as described in Specification 868,496.  In an example, polyethylene terephthalate (homopolyester) having a relative viscosity of 16 is melt-spun to give a yarn which is combined into a tow, drawn in a water bath maintained at 90 DEG C. at a draw ratio of 3,16, crimped in a stuffing-box crimper, relaxed in air at 140 DEG C. and cut into 2 1/2 -inch lengths.  In the other example, staple fibres are similarly prepared from a copolymer of polyethylene terephthalate containing 2 mole per cent of sodium 3, 5-di (carbomethoxy) benzene sulphonate and having a relative viscosity of 17.  Yarns and fabrics prepared from the fibres have improved resistance to "pilling" and "frosting." Specification 578,079 also is referred to.
Patent GB-237501-A (GB)
Title: Improvements in body side sill construction
IPC: B62D25/00
Filed: 1925-01-10
Abstract: 237,501. Budd Manufacturing Co., E. G., (Assignees of Ledwinka, J.). Sept. 29, 1924, [Convention date]. Bodies. - The side-frame construction of pressed-steel motor-car bodies, particularly of the closed type, comprises body sills 25, Fig. 1, of the section shown in Fig. 6, comprising an inverted channel 34 and inner and outer flanges 35, 30, the flange 30 having an inwardly and downwardly bent portion 31. To the body sills are connected the toeboard support 27, posts 22 - - 24, the seat support 54, the rear-post bracket 29, and the tonneau sills 28, The toe-board support 27 comprises a body 36, Fig. 8, having interiorly-extending flanges, and is connected by welding to the body sills through an intermediate angle member 40, Fig. 10, and the rearward extension of the upper flange of the body 36. The post 22 is of channel section and is connected to the side sills 25 and the seat support 54 by means of integral lugs 53, Figs. 1 and 4, a reinforcing member 56 being welded to the post and to the top of the side sills. The rear-post bracket 29, the rear post 24, the side sills 25, and the tonneau sills 28 are all interconnected. As shown in Figs. 11 and 13, the bracket 29 is welded to the side sills by means of an intermediate member 65 and is formed with a bottom flange 61 to which the forward extension of the tonneau sills is welded and also with a channel section 63 to accommodate the post 24. In other forms, the forward extension of the tonneau sill may be welded between the bracket 29 and the side sill 25 and also to the cross-brace connecting the side sills at each side of the body, or the side sills may be welded to the bracket 29 and the tonneau sills 28 welded to the bracket 29 and to the crossbrace. The bracket 29 may form part of the wheel housing.
Patent GB-937048-A (GB)
Title: Photographic objective
IPC: G02B13/04
Filed: 1960-01-08
Abstract: 937,048. Photographic objectives. AGFA A.G. Jan. 8, 1960 [Jan. 22, 1959], No. 814/60. Class 97 (1). A photographic objective of the type consisting of four members of which the front member, which is diverging and includes a negative meniscus convex towards the front, is separated from the other than members by an air space equal to at least 0.35 times the equivalent focal length f, the second member is converging and includes a bi-convex lens, the third member is diverging with the front surface thereof concave towards the front, the fourth member is converging and consists of a negative lens separated from a positive lens by an air space, less than 0.05 f, is characterized in that the focal length of the front member is between 0.75 F and 1.4 F, the air to glass surfaces of the second member have curvatures not greater than 0.7 times those of the front member, the air space between the second and third members is between 0.1 F and 0.3 F, and the focal length of the fourth member is between 2-2 f and 6.7 f. The front member may as shown consist of a single meniscus which is convex towards the front and is of a glass with an Abbe number higher than 55, in which case the second member is a cemented doublet consisting of a bi-convex lens and a negative meniscus, the difference in the Abbe numbers of which exceeds 15. In a further embodiment, the front member consists of two menisci both of which are convex towards the front and at least one of which has an Abbe number higher than 55, and in this embodiment the second member consists of two positive lenses separated by an air space greater than 0.05 times the equivalent focal length, the rear one of these lenses being of greater power and having the higher Abbe number. It is preferred that the third member shall consist of a negative meniscus concave towards the front and having a focal length greater than that of the negative lens of the fourth component and consisting of a glass having refractive index higher than 1.65. Optical data are given in the Specification from one example of each of the two embodiments.
Patent GB-120488-A (GB)
Title: Improvements in Driving Chains.
IPC: F16G13/04
Filed: 1918-01-15
Abstract: 120,488. Brampton Bros., and Richmond, R. H. Jan. 15, 1918. Driving-chains with separate joint pins.-In driving-chains of the " silent " type, wherein a projection is formed in the plates beneath each pivot joint, the bearing edges of the teeth are fitted with separate bearing-blocks 2 having webs 3 perforated for the passage of the pivot pins, whereby they are secured in place. For links formed of two parallel plates 1 spaced apart as shown in Fig. 2, the blocks are formed as shown in Fig. 5, and the web 3 is inserted between the plates. If the links comprise single plates, blocks formed as shown in Fig. 8 embrace their ends. Or in two-plate links, a block formed as shown in Fig. 10 may be used at each end of each plate. The bushes may be formed separately, or integral with the blocks as shown at 10, Fig. 10. Recesses 9, Fig. 13, may be formed in the plates to accommodate the blocks.
Patent GB-1071923-A (GB)
Title: Electrolytic production of soluble compounds
Inventor: CARNELL PETER JOHN HERBERT
IPC: C25B3/29
Filed: 1964-01-08
Abstract: An electrolytic process for oxidizing or reducing a dissolved substance to give a dissolved product wherein at least one electrode is subject to a wiping action whilst immersed in the electrolyte, thus providing reduced susceptibility to an inadequate rate of diffusion of a product of the electrolysis away from an electrode surface, and/or of a reactant from the electrolyte to that surface, i.e. when the reaction substance is non-ionic, e.g. the reduction of acrylonitrile to adiponitrile; or when the charge of the reaction substance is the same as that of the electrode at which it reacts, e.g. the electrolysis of a bisulphate to produce dithionate, of a nitrite to produce hyponitrite or of a nitrate to produce hydroxylamine. The wiper is preferably of a deformably material, e.g. soft rubber, nylon bristles or plastic mesh fabric.  The cathode material may be bismuth, or a metal or alloy having a low hydrogen overpotential such as titanium nickel, chromium or stainless steel, the surface of which may be poisoned.  The electrolyte may contain a water miscible alcohol, an organic base and a surface poisoning agent, e.g. mercuric ions. The electrode may be fixed and its surface wiped by a moving blade, or vice versa.  In one embodiment (Fig. 2) the cell 20 contains catholyte 36, and anolyte 34 contained within a porous pot 22. The cathode is formed by a bismuth disc 24; and a stirrer 26, suspended vertically through centre of the porous pot 22, is fitted with two soft sponge rubber wiper blades 30 arranged to contact the surface of said bismuth cathode and thereby provide wiping action on rotation of the shaft 26. In a second embodiment, Fig. 4 (not shown), the cell (60) is provided with graphite anodes (78), a cathode formed by metal cylinder (80) screwed on to a stainless steel shaft (82), driven by a motor (not shown), and having a "perspex" (Registered Trade Mark) cone (84) cemented to the bottom thereof, a cation exchange membrane (98). Wiper blade supports (108) Fig. 5 (not shown) extend between the diaphragm rings (100) and (102), having attached thereto wiper blades (110) made of latex rubber.  In operation the wipers are stationary and wipe the cathode as it rotates.
Patent HK-24095-A (HK)
Title: Method of designing progressive addition lenses
Inventor: SILVA DONALD E
IPC: G02C7/02
Filed: 1995-02-23
Abstract: A method of designing progressive addition lenses is provided in which the surface of the lens is in effect synthesized directly from its specification. A desired pattern of grid lines is produced in which the astigmatism is distributed over the entire pattern of grid lines in a predetermined manner, a standard grid viewing system from which rays are traced is then assumed, and surface normals for each grid crossing are calculated by using the grid object and grid image as known quantities and solving for each surface normal using the law of refraction and determining the surface of the lens from the respective surface normals.