baber/WOPTO huggingface dataset:
Patent GB-837560-A (GB)
Title: Improvements in timing devices for data storage apparatus
IPC: G11B20/14
Filed: 1956-09-21
Abstract: 837,560. Self-clocking arrangements for datastorage apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. Sept. 21, 1956 [Sept. 28, 1955], No. 28959/56. Class 106(1). In a magnetic drum or disc storage device clock pulses are obtained from one of two oscillators, Fig. 1, which are caused to oscillate alternatively by successive data pulses read from the drum or disc. In this way the clock pulses -being the mixed output of the two oscillators -are brought into phase with the recorded data at frequent intervals. For writing on the drum or disc only one oscillator is used. Specification 819,789 is referred to.
Patent GB-248456-A (GB)
Title: Improvements in eye-shades or screens
IPC: G02C7/10
Filed: 1924-12-03
Abstract: 248,456. Hodd, G. W. Dec. 3, 1924. Addition to 233,480. Eyeshields.-The eyeshields described in the parent Specification are provided with an unobstructed sight opening f for each eye for observation when the shield is lowered. The openings f are in the form of elongated slots horizontally arranged and fitted with adjustable shutters g, which may comprise a single strip common to both openings.
Patent GB-261753-A (GB)
Title: Improvements relating to the fine grinding of corn
IPC: B02C4/42
Filed: 1926-11-17
Abstract: 261,753. Schermann, R. Nov. 17, 1926. Drawings to Specification. Reduction processes.-In the fine grinding of corn, the first stages of the process are carried out by roller pairs in which the cutters of one roll, rotating at a high speed, act on the backs of the cutters of the other roll rotating at a slower speed at a differential ratio of 1 : 4 4 to 1 : 4¢, while the last grinding operations are carried out by roller pairs having ribs acting back to back at a differential ratio of 1 :4¢ to 1:5.
Patent GB-868178-A (GB)
Title: Improvements in and relating to contact lenses
IPC: B24B9/14
Filed: 1959-08-25
Abstract: 868,178. Grinding lenses. PLASTIC CONTACT LENS CO. Aug. 25, 1959 [Sept. 2, 1958], No. 29066/59. Class 60. A method of finishing semi-finished contact lenses, e.g. of polymethyl-methacrylate, to give a smoothly-rounded edge comprises " touchpolishing " (i.e. a polishing operation of short duration using a light pressure) the marginal portions in a series of operations, Fig. 13, in which both the posterior and anterior marginal areas of an otherwise finished lens L are ground at successively increasing or decreasing angles to the peripheral plane, as shown in Fig. 14, and subsequently blending the transition ridges between the adjacent angles by polishing to provide the rounded edge 36b, Fig. 15, between the posterior surface PS and the anterior surface AS. A wet grinding operation is preferred throughout to avoid burning the lens, a suitable polishing agent being stannic oxide and water, the polishing pads being rotated at speeds which are low relative to normal buffing speeds and the lens being operated upon in each step during a few seconds only. The successive operational steps, Figs. 13 and 14, are as follows : in step 1, the lens L is ground to the desired diameter D<SP>2</SP> by a grindstone 80 whilst mounted on a vacuum cup-type holder 26. In step 2 a bevel 28, Fig. 14, is ground on the anterior surface by an emery stone 24. When the lens is of plastic material, this operation may be effected by turning in a lathe. The concavity of the stone may be 10 degrees larger or smaller than 90 degrees and the stone may rotate at 1200 r.p.m. for this operation, which is a roughing one only. Step 3 consists of touch-polishing the bevel 28 in a tool cavity lined with felt 34, velvet or moleskin charged with a polishing agent and rotated at 80 to 120 r.p.m. Step 4 roughs the secondary curve 30, Fig. 14, on the posterior surface of the lens on a stone 38 rotated at about 1200 r.p.m. In step 5 the secondary curve 30 is "touch polished " on a pad of material 42 similar to that used in step 3 and in step 6 the transition between curves 20 and 30 is blended by touch-polishing on a pad 46. Steps 4, 5 and 6 are omitted when the lens L has no secondary curve 30. Steps 7 to 12 are further touch-polishing operations with the lens reversed in the last two to remove burrs on the anterior peripheral edge formed by step 10, further to round the edge. A further step 13, using the tool 74 with a 40 degrees angle, may be included in the process. The successive steps may be effected by the various tools arranged along a work bench or in a circle, the sequence of operations as detailed above being varied as desired. The rounding of the edges will reduce the diameter slightly to the required finished size D3.
Patent GB-1119291-A (GB)
Title: Monitoring the state of insulation of unearthed electric distribution systems
IPC: H02H3/17
Filed: 1965-07-08
Abstract: 1,119,291. Protective systems. SIEMENS-SCHUCKERTWERKE A.G. 8 July, 1965 [10 July, 1964], No. 29086/65. Heading H2K. An arrangement for protecting against earth faults in an un-earthed A.C. system, comprises means 7 for applying a D.C. voltage to the system and means 8 ... 10 responsive to the D.C. voltage at different parts of the system. As shown the means 7 include a D.C. source and a relay connected to the system through an artificial star point, the relay being effective to open a main switch 1 when the D.C. current is excessive due to an earth fault. The means 8 ... 10 are connected to individual branch circuits I, II, III through filters 11. Each means 8 . . . 10 includes a diode (not shown) which permits current to flow from a reference source 12 to the supply system when the D.C. voltage at that point of the system falls below that of the reference source due to earth leakage. Each means 8 ... 10 effects the opening of a switch 4 in the associated branch circuit and these means may respond at different voltage levels.
Patent GB-851632-A (GB)
Title: Improvements in or relating to plastering machines
IPC: E04F21/12
Filed: 1958-09-11
Abstract: 851,632. Plastering machines. KLEMP, G. Sept. 11, 1958, No. 29145/58. Class 20(4) A plastering machine employs air from rows of jets 9a 7a to impel plaster on the wall from a container 1, the latter being carried on supports 15 and movable vertically by hydraulic or pneumatic control. Smoothing members 5, 6 and 11 are actuated by jacks 12, 13 and a central control device 18 is provided.
Patent GB-753334-A (GB)
Title: Improvements in pickers for looms for weaving
IPC: D03D49/36
Filed: 1953-10-23
Abstract: 753,334. Loom pickers. BROOKSBANK, W. R. Oct. 25, 1954 [Oct. 23, 1953], No. 29266/53. Class 142 (2). A picker is made by separately moulding a body b and a striker a on to a skeleton c, whereby a worn striker can be broken away and a new one moulded on. The skeleton has screws d interconnecting its webs so that the striker cannot be removed intact; in another form, the skeleton consists of horizontal flanges in the body and striker joined by an integral vertical web.
Patent GB-757011-A (GB)
Title: Improvements relating to presses for vulcanising pneumatic tyres
IPC: F17C13/08
Filed: 1954-10-11
Abstract: 757,011. Vulcanizing tyres. PIRELLI SOC. PER AZIONI. Oct. 11, 1954 [Oct. 9, 1953], No. 29267/54. Class 87(2) When toggle levers 13 are moved to open a tyre vulcanizing mould 3, 4, a disc 15 of a curing bag comprising discs 15, 16 and a rubber membrane 14, is rotated by gears 11, 12 and shaft 10 to cause the membrane to wind itself about the shaft 10 (see Fig. 5) and thus allow the tyre 1 to be removed. When the mould part 3 is closed, the membrane is unwound and "curing" fluid is simultaneously supplied through a pipe 17 to help to unwind the membrane. The fluid is automatically expelled when the membrane is wound.
Patent GB-469472-A (GB)
Title: Improvements in alternating current modulation and demodulation systems
IPC: H03C1/62
Filed: 1935-10-24
Abstract: 469,472. Valve modulating circuits ; valve circuits for wireless reception. WILLIAMS, F. C. Oct. 24, 1935, No. 29425. [Class 40 (v)] A modulation system comprises a pair of rectifiers, with resistance-capacity load circuits in series, so arranged that they pass carrier current on the same half cycles ; an output circuit receives the difference between the two rectified currents, the difference being varied by differently biassing the two rectifiers by the modulating voltage. In the Figure, the carrier voltage is applied across the circuit A, the ends of which are connected through the load resistances r1 r2 to the diodes D1, D2. The output circuit O is connected to the junction of the diodes. This junction j is connected through the modulating transformer M to a potentiometer for obtaining bias as shown. With no modulation applied and the steady bias Eb of the point j zero, if the diodes and their loads are balanced the voltages across r1 and r2 are equal and cancel the applied voltage 2E and no current is supplied to the output circuit. If the bias Eb is not zero; current flows in the output circuit and current depending upon modulating voltages may be caused to flow in the output by applying modulation at M. By altering the time constants of the rectifier load circuits, the modulation-frequency characteristic may be varied and the system may be used to generate harmonics by appropriate tuning of the output circuit. Any required modulation depth or suppressed carrier effect can be obtained by suitable adjustment of the bias Eb relative to the modulation voltage. Fig. 2 (not shown), is an inversion of Fig. 1, the diodes passing current in the same direction, the output circuit being divided and reversely connected. In Fig. 3 (not shown), triodes or screen grid valves are used as rectifiers, with the carrier applied in parallel. and the modulation in push-pull to the grids. The system may be adapted to act as a demodulator of suppressed carrier transmissions by introducing the local carrier in place of the carrier, the signal into the output circuit and obtaining the output from the modulating transformer. The arrangement of Fig. 3 is not, however, directly reversible ; the modulation and carrier frequency circuits must be interchanged as in Fig. 6 (not shown).
Patent GB-673798-A (GB)
Title: Process for the manufacture of a novel isothiocyanate
IPC: C07C331/28
Filed: 1950-12-01
Abstract: The m-allyloxyphenyl isothiocyanate of Specification 673,346 is prepared by treating m-hydroxyphenyl isothiocyanate or an alkali salt thereof with an allyl halide, if necessary in the presence of an acid-binding agent (e.g. alkali metal hydroxide or carbonate).  The hydroxyphenyl compound is prepared from m-aminophenol by known methods, e.g. reaction with thiophosgene in water or other inert solvent.  Examples are given of both steps.
Patent GB-522473-A (GB)
Title: Ported end sealing plates for rotary pumps
IPC: F01C21/10
Filed: 1938-10-12
Abstract: 522,473. Rotary engines &c. FULCHER, F. C. Oct 12, 1938, No. 29557. [Class 110 (ii)] The open end of an overhung rotor 13 carrying sliding rocking vanes 15 runs in a groove 41 in an insert plate 21 clamped between the open end of the casing 10 and an end plate 20. The cavity 22 of the end plate is divided by webs 36, 37 which make sealing engagement with the plate 21 and by means of the portions of that cavity, so separated, and ports 42, 45 through the insert plate, the inner and outer working chambers are connected in appropriate pairs S, S<1> and D, D<1>. Specifications 522,470, 522,471 and 522,472, [Group XXIV], are referred to.
Patent GB-1112465-A (GB)
Title: Improvements in insulating products made of fibres of materials in the vitreous state
IPC: D04H1/00
Filed: 1966-07-01
Abstract: 1,112,465. Heat-treating vitreous fibrous mat. COMPAGNIE DE SAINT-GOBAIN. 1 July, 1966 [13 July, 1965], No. 29626/66. Heading C1M. A mat or felt is heated to its annealing point and this is stated to stabilize it dimensionally. The mat may also be subjected to compression during the treatment. Preferably the treatment is applied to the output of a continuous production apparatus. The mat may include a heat-resistant binder.
Patent GB-520158-A (GB)
Title: Improvements in or relating to wool shears
IPC: B26B19/24
Filed: 1938-10-13
Abstract: 520,158. Hand shears. INDUSTRIAL PATENTS CORPORATION. Oct. 13, 1938, No. 29681. Convention date, Aug. 19. [Class 30] A rubbing-stick 6 is secured to the side of one handle 2 of a sheep shears.
Patent GB-533490-A (GB)
Title: Apparatus for taking samples of sugar cane during conveyance in a cane conveyor
IPC: G01N33/02
Filed: 1939-11-11
Abstract: 533,490. Sawing: conveyers. DUNCAN, STEWART & CO., Ltd. (Feltham. O. A., Dymond, G. C., and Murray, P.). Nov. 11, 1939, No. 29894. [Class 145 (ii)] [Also in Group XXX] Samples of sugar cane are taken whilst the cane is travelling on a conveyer 11 by a canecutting element or circular saw 26 adapted to be moved intermittently into the path of the cane. An electric motor 28 and a saw driven thereby are both mounted on a frame 15 which is oscillated, preferably by a cam 35 driven from a sprocket 34 engaging the conveyer chain. A single or multiple saw thus passes from the interior of a shoot 43 through a narrow slot or slots in a plate 41 laterally into the path of the cane, portions of which pass through the slot and are collected at a sliding cover 45 at the foot of the shoot. The extent of movement is adjustable.
Patent GB-1125041-A (GB)
Title: Electric cells
Inventor: RICHARDSON DAVID WHYTOCK
IPC: H01M2/02
Filed: 1964-07-27
Abstract: 1,125,041. Batteries. BURNDEPT Ltd. 8 July, 1965 [27 July, 1964], No. 29918/64. Heading H1B. A polymeric resin dissolved in an organic solvent is applied, e.g. by roller coating, to the outside of consumable anode 10, and the solvent is allowed to evaporate and the resin to cure to form a leakproof layer 12 on the anode 10. A formula for an epoxy resin coating is specified. A fibrous reinforcing filler may be added to the resin. The coating may extend over the entire exterior of cell, electrical contact with the electrodes being established by areas 13 of resin which have carbon or metal mixed therewith. A metal foil 28 is adhered to the conductive area 13. As shown the anode 10 is enclosed in a paper jacket 20 which is trapped between the turned over top of the anode and an internally coated metal lid 24. The portion 26 of jacket 20 between the lid and anode acts as a vent. The can may be zinc, aluminium, or magnesium.
Patent GB-1217390-A (GB)
Title: Boric acid recovery
IPC: C07C29/52
Filed: 1968-06-24
Abstract: 1,217,390. Recovery of boric acid. MONSANTO CO. 24 June, 1968 [10 July, 1967], No. 30011/68. Heading C1A. [Also in Division C2] The water content of at least a portion of the residual liquid produced by hydrolysing a borate ester containing mixture and separating oxidized hydrocarbon and boric acid therefrom is reduced such that the portion does not contain more than about 25% by weight of carbon, and boric acid is recovered therefrom. The water content may be reduced by evaporation, preferably under reduced pressure, to not more than about 60%. The boric acid may be recovered by crystallization and washed in water or aqueous boric acid.
Patent GB-1192005-A (GB)
Title: Improvements in or relating to Sawing Apparatus
Inventor: SHORT RICHARD PERCY JASPER
IPC: B27B29/00
Filed: 1966-07-04
Abstract: 1,192,005. Sawing. R. P. J. SHORT. 3 Oct., 1967 [4 July, 1966], No. 30017/66. Heading B5L. A base frame for a sawing device, such as that described in Specification 732,524 having a slideway which can be mounted on a tree trunk and along which a sawing unit is movable to cut the tree trunk, comprises legs or supporting frames whereby it can lie upon a surface, the frame being adapted to receive the slideway of the sawing device on its upper surface, and means for securing a tree trunk on the upper surface. The base frame has a number of transverse supporting frames 3 which are secured together by braces 5 and have adjustable feet 6. The rear of the frame has a raised portion 8 to which the slideway 9 of the sawing device 10 is clamped. The front of the frame has bearers 11 for a tree trunk to be cut by a saw 12. The trunk is clamped by spikes 28 on, posts 15 which can be pivoted from the vertical position shown to a horizontal position below the upper surface of the bearers during loading of a tree trunk by movement about pins 19 on portions 18 vertically movable on portions 16 slidable along transverse rails 17. Levers 22 connected to the portions 18 are provided for lowering the spikes into the trunk, screws 25 clamping the levers in position. A ramp 30 is provided for moving trunks on to the bearers 11. The sawing unit may have two saw blades for cutting horizontal and vertical cuts.
Patent GB-1473882-A (GB)
Title: Composite nonwoven web
IPC: D04H1/04
Filed: 1974-07-08
Abstract: 1473882 Laminated non-woven web JOHNSON & JOHNSON 8 July 1974 [9 July 1973] 30095/74 Heading B5N [Also in Division D1] A non-woven web comprises two juxtaposed through-bonded layers, one layer (a) comprising a mixture of short and long fibres (i.e. less and greater than  inch), the two faces containing respectively an excess of long and short fibres over the total concentration thereof in the web and there being a continuous gradual transition of fibre concentrations between said faces, and the other layer, (b) being bonded to the face of layer (a) containing an excess of short fibres and having at its outer face a greater concentration of long fibres than is present at the inner "short-fibre" face of layer (a). The long fibres may be textile-length rayon, polyester, cellulose acetate, nylon or polyvinyl alcohol, and the short fibres may be wood pulp or cotton linters for papermaking. The layer (a) may comprise 25% long fibres and 75% short fibres, rising to 32À5% and 82À5% at the enriched faces. Layer (b) may (1) be identical to layer (a), with the layers bonded in mirror relationship; or (2) may comprise (i) a uniform blend of long and short fibres, (ii) separate strata of long and short fibres, or (iii) as (ii) but with an intermediate stratum of blended long and short fibres; or (3) may be entirely of long fibres. Layers of type (2) may be produced on an apparatus in which separate fibre streams are fed to a common duct, the degree of intermixing being controlled by a baffle (see Specification 1,375,585). The outer face of layer (b) may be reinforced by woven fabric or plastics sheets. Where layers (a) and (b) are identical, the short-fibre enriched face may be moistened and compacted to provide a paper-like densified surface; two such layers may be bonded with these faces in contact. The layers (a) and (b) may be of the same or different thickness; in the latter case the thinner layer should comprise at least 20% of the total thickness. As shown (see also Specification 1,375,585), identical webs (a) and (b) are formed from short fibre masses 22 and long fibres 23 which are opened and mixed by rotating lickerins 24, 25 feeding individual fibres into gas streams. The gas streams intersect, whereby the fibres are deposited over different portions of a foraminous belt 27, with the aid of suction 35. The layers are combined at 29 and bonded at 31, with the aid of suction at 33, by a selfcross-linking acrylic emulsion which may contain a surfactant. Alternatively, the bonding agent may be separately applied to each layer before combination. The combined web is dried throughout, to prevent migration of binder, by dielectric, infrared or air flow heating at 41 and on the surfaces by steam cans 42, 43. If the binder is allowed to concentrate at the surfaces, a delaminatable web may be formed. In modifications, the two belts may move in the same direction, one layer being removed for combining (thus varying the shingling of the fibres), or the second layer may be deposited directly on the first.
Patent GB-745704-A (GB)
Title: Ultraviolet radiation absorbing compounds and photographic elements containing such compounds
IPC: G03C1/815
Filed: 1953-10-30
Abstract: 4 - {3 - [a  - (3 : 5 - Dicarboxyphenoxy) - acetamido]-benzoyl}-6-n-hexylresorcinol (sodium salt) is prepared by hydrolysing with alcoholic caustic soda 4-{3-[a -(3 : 5-dicarbomethoxyphenoxy) - acetamido] - benzoyl} - 6 - n - hexylresorcinol, itself prepared by reacting 4-(3-aminobenzoyl) - 6 - n - hexylresorcinol with a  - (3 : 5-dicarbomethoxyphenoxy) - acetyl chloride in acetonitrile.  4 - {3 - [a  - (3 : 5 - Dicarboxyphenoxy) - acetamido] - benzoyl} - 6 - n - dodecylresorcinol (sodium salt) and the corresponding dimethyl ester, and 4-[3-(3-sulphobenzamido)-benzoyl]-6-n-hexylresorcinol (sodium salt) are similarly prepared.  4 - (3 - Aminobenzoyl) - 6 - n - hexylresorcinol is prepared by reducing with hydrogen in the presence of Raney nickel 4-(3-nitrobenzoyl)-6-n-hexyl-resorcinol, itself prepared by condensing 4 - n - hexylresorcinol with 1 - cyano - 3 - nitrobenzene.  a  - (3 : 5 - Dicarbomethoxyphenoxy) - acetyl chloride is prepared by condensing dimethyl 5-hydroxyisophthalate with sodium chloracetate in presence of sodium methoxide.  4 - [3 - (3 - Chlorosulphonylbenzamido) - benzoyl]-6-n-hexylresorcinol is prepared by condensing 4-(3-aminobenzoyl)-6-n-hexylresorcinol with 3-chlorosulphonybenzoyl chloride.
Patent GB-1450381-A (GB)
Title: Temperature indicator
IPC: G01K11/12
Filed: 1972-06-28
Abstract: 1450381 Temperature indicators J E HUGHES 28 Sept 1973 [28 June 1972] 30208/72 Heading G1D A temperature indicator which gives an irreversible indication when the temperature of an article, e.g. foodstuff, has exceeded a predetermined temperature, comprises a rigid tubular capsule which is divided into two compartments 24a, 24b by a partition 26, one compartment 24a containing a non acidic aqueous solvent whilst the other 24b contains a dye which is soluble in the solvent. The partition ruptures on freezing of the solvent allowing subsequent melting to react with the dye to produce a colour change. As described, the dye may be of the type which is colourless or white when solid and coloured when dissolved in the solvent. Alternatively, the solid dye may be enclosed in a covering of white or colourless material e.g. sugar which dissolves in the solvent so as to allow the dye to be released. Solid dye portions may be enclosed in materials which dissolve in the solvent at differing rates. Suitable choices of dyes will thus enable the time lapse after melting of the solvent to be ascertained. The solvent may be an ethyl alcohol in water mixture. An end cap 16 may be of transparent plastics and shaped to give a magnified image of the contents in compartment 24b.