baber/WOPTO huggingface dataset:
Patent GB-1501874-A (GB)
Title: Telecommunications apparatus
IPC: G10L25/00
Filed: 1975-06-03
Abstract: 1501874 Speech transmission DEFENCE SECRETARY OF STATE FOR 3 June 1975 [7 June 1974] 25475/74 Heading H4R In a pulse code modulation system, the logarithmically compressed amplitudes of, and time intervals between, successive stationary points (maxima and minima) of an input analogue waveform are encoded, and the decoder includes a filter whose response time is controlled in accordance with the received time interval signals. Coder.-Stationary points are detected by a differentiator 2 and zero cross detector 4 which controls the sampling instants for the amplitude coder 6 and the time interval coder 7, either or both of which may have a compressive characteristic. Decoder.-Timer 15 controls read out of time interval and amplitude codes from buffer 13 in accordance with the time interval codes. Amplitude decoder 17 produces a stepped wave analogue output in which each level has a duration corresponding to a respective time interval code and this stepped wave is smoothed in a second order controllable filter 19, details Fig. 3 (not shown) comprising impedances which are switched in and out of circuit with a variable duty-cycle determined by the time interval decoder 16 to match the rise time of the filter to the duration of each step in the output of the amplitude decoder 17. Transmission link.-In order that the P.C.M. signals may be transmitted at a predetermined regular bit rate, despite irregular sampling, buffer stores 8, 13 are provided and the transmission link has a slight excess capacity. When multiplexer 9 finds an empty store location, a zero time interval code is transmitted together with a repetition of the previous amplitude code.
Patent GB-317855-A (GB)
Title: Manufacture of artificial silk
IPC: C08B7/00
Filed: 1929-08-21
Abstract: 317,855. Naamlooze Vennootschap Fabriek van Chemische Producten, (Assignees of Elgersma, J. N.). Aug. 24, 1928, [Convention date]. Cellulose carboxylates and processes for making filaments therefrom.-Artificial silk consisting of acetyl nitro-celluloses of high stability and high acetyl content is prepared by acetylating partlynitrated cellulose with sulphuric acid or derivative thereof as a catalyst; removing the excess of acetic anhydride after the acetylation process is completed, by addition of the equivalent quantity of water or an alcohol; allowing the mixture to stand until all the sulphuric acid in the esterified cellulose is replaced by acetic acid, as described in Specification 317,854; filtering the liquid, preferably after removing free sulphuric acid by adding the equivalent quantity of sodium acetate, and spinning into a spinning bath containing, for example, aqueous acetic acid. The artificial silk possesses high tensile strength, gloss, elasticity, and waterproof properties greater than those of artificial silk prepared from primary acetyl cellulose, whilst it is only slightly more inflammable than such silk. Any waste silk may be dissolved in concentrated acetic acid and added to the spinning solutions.
Patent GB-1097672-A (GB)
Title: Liquid fuel injection nozzle units for use with internal combustion engines
Inventor: DRORI MOSHI
IPC: F02M61/12
Filed: 1964-11-19
Abstract: 1,097,672. Fuel injectors. C.A.V. Ltd. Oct. 19, 1965 [Nov. 19, 1964], No.25544/64. Heading F1B. A guide bush 20 for the upper end of a needle valve 12 is secured in position in a tubular injector body 10 by fusible metallic material 21 e.g. solder. In Fig. 2 (not shown) the outer surface of the bush 20 and the inner surface of its surrounding bore are screw-threaded with threads of differing diameter to provide a gap for the solder 21.
Patent GB-593145-A (GB)
Title: Improvements in or relating to rug making and devices employed therein
IPC: D04G3/00
Filed: 1944-12-20
Abstract: 593,145. Rug-making appliances. WILLIAMS, A. G. Dec. 20, 1944, No. 25591. [Class 142 (iv)] A rug-making appliance comprises a frame 10 having a closed longitudinal slot 10a, the ends of which can be engaged by a spring loaded hooked spindle 15 and a hooked handle 16a to facilitate winding yarn 11 on the frame. The frame is then removed from the winder and the coils of yarn sewn to a backing along the slot 10a, after which the pile loops so formed are cut and the frame withdrawn. The frame 10 may be made by a stamping operation or by welding or otherwise permanently securing end pieces to a pair of parallel strips.
Patent GB-644806-A (GB)
Title: Improvements in or relating to processes and devices for spinning and/or twisting
IPC: D01H1/08
Filed: 1947-09-22
Abstract: 644,806. Centrifugal spinning and twisting. BRITISH BELTING & ASBESTOS, Ltd., SYKES, F., and CROWTHER, H. Sept. 22, 1947, No. 25703. [Classes 120(i) and 120(ii)] In the centrifugal spinning and/or twisting of asbestos yarns wherein roving or yarn passes through feed rollers 15, 16 and a yarn guide 8, the outlet of the yarn guide 8 is maintained at a constant distance from the feed rollers 15, 16. Preferably, the rollers 15, 16 and guide 8, which may be split longitudinally for threading, are supported on a common vertically reciprocated rod 11. Roller 15 is driven by a flexible shaft 20 and changeable gears 21 from a motor 7, which also drives the spindle 2 and centrifugal pot 1. As the spindle is required to rotate at high speed, e.g., between 6,000 and 10,000 r.p.m., it is shaped as shown and the upper bearing is located in a vibration-damping material 5, such as rubber. Roller 16 is frictionally driven from roller 15 and is urged against the latter by the inclined guide face 23 of an adjustable pivoted member 24. According to the Provisional Specification, the rollers 15, 16 may be loaded by weights, springs, hydraulic or other devices. The feed rollers may crush fibre clusters and impurities in the roving or yarn. Several spinning or twisting units may be arranged side by side and may be fed by rovings or yarns from bobbins or by rovings led directly from the condenser of a carding machine.
Patent GB-1048397-A (GB)
Title: Improvements in or relating to hydraulically operated resilient devices
Inventor: BITTEL KARL
IPC: F16F9/16
Filed: 1963-06-28
Abstract: 1,048,397. Hydraulic shock-absorbers. ZEN. TRALE ENTWICKLUNG UND KONSTRUKTION ZEK HYDRAULIK VEB. June 28, 1963, No. 25737/63. Heading F2S. A substantially constant force hydraulic spring comprises a differential plunger 4a, 4b which extends through seals in end covers 2, 3 respectively of a working cylinder 1, the plunger part 4a of larger diameter having a hollow interior 4d which communicates with the space within the cylinder 1 through ports 4e. The cover 2 and the screw plug 3 threadedly engage the cylinder 1 for adjustable displacement serving to adjust the pre-loaded pressure of the hydraulic fluid in the cylinder 1. The two plunger parts 4a, 4b taper respectively towards their outer ends the smallest cross-section of the part 4a slightly exceeding the largest cross-section of the part 4b. Vents 13 permit occluded air to escape during assembly. A simple taper piston could be employed.
Patent GB-333409-A (GB)
Title: Improvements in the manufacture of abrasive articles
IPC: B24D3/28
Filed: 1929-08-23
Abstract: 333,409. Carborundum Co., Ltd., (Assignees of Robie, N. P.). Oct. 27, 1928, [Convention date]. Compositions containing artificial resins and abrasive materials.-Abrasive wheels and other articles comprising abrasive grains bonded with artificial resin are made by mixing the grains with a liquid reactive resin containing no volatile solvent, adding dry powdered reactive resin or other dry powdered material, forming by pressure and finally hardening by heat. Suitable resins are phenol-aldehyde, urea-aldehyde and acid-glycerol resins. Inert fillers such as graphite, flint, clay, &c., or organic fillers such as pitch, rosin, shellac, powdered plastic waste, cellulose acetate and natural and synthetic gums may be mixed with the powdered resin to modify its properties or may be used without the powdered resin. Suitable abrasives are alumina, emery, garnet, flint, corundum and silicon carbide. In an example, 1,820 parts of fused alumina grit are mixed with 38 parts of an A stage phenol-aldehyde resin and 130 parts of a dry powdered solid phenol-aldehyde resin are added; abrasive wheels are cold pressed at pressures from 1,500 to 2,500 lb. per sq. inch and hardened by heating to 350‹ F.
Patent GB-1428208-A (GB)
Title: Light emitting arrays
IPC: H01L21/306
Filed: 1973-05-30
Abstract: 1428208 Electroluminescence INTERNATIONAL BUSINESS MACHINES CORP 30 May 1973 [22 June 1972] 25832/73 Heading C4S [Also in Division H1] An LED array comprises a semi-conductor substrate 10 which is a compound including Group III and Group V elements and has a background doping throughout of a first conductivity type, a plurality of individual opposite conductivity type regions formed in the substrate adjacent a first major surface and mutually separated by first conductivity type regions of the substrate and forming P-N light-emitting junctions 18, and at least one further opposite conductivity type region 22, 20 formed in the substrate adjacent the first or opposite major surface thereof and forming with the substrate a P-N junction to absorb light not emitted by the light-emitting junctions towards the first major surface of the substrate. The arrays, including contacts, may be fabricated as in Specification 1,411,555 where Zn is diffused through a thin silicon dioxide layer (12) (Fig. 1, not shown) to form a P-type region in an N-type doped (e.g. Sn, Te or Se) GaAs substrate. A selectively etched Si 3 N 4  layer (14) masks the Zn diffusant. In one embodiment of the present application, Zn is also diffused in the back of the substrate forming a PN junction that absorbs light which was previously reflected from the backside of the substrate and so reduces cross-talk. The P-type diffusion 20 may be 3 to 4 times deeper than junction 18. Dimensions and concentrations are given. Fig. 3 includes diffused guard rings 22 to minimize spurious reflections and may be used alone or in combination with diffused layer 20. Diffusions are simultaneous. Rings 22 may be replaced by a single grid structure. GaAs of (100) or (110) orientation may be used, and also mixed III-V semi-conductors. The diffusion is into the planar surface having As surface atoms if a (111) crystal is used because of a faster diffusion into As than Ga. Ion implantation may be used instead of diffusion.
Patent GB-980520-A (GB)
Title: Trimming strips for buildings
IPC: E04D13/15
Filed: 1962-07-05
Abstract: 980,520. Roof trimming strips. G. J, SNELL, and J. F. C. GRANDI. May 31. 1963 [July 5, 1962], No. 25871/62. Heading E1V. An eves trimming strip for use with feltcovered roofs is of synthetic resin extruded in a T-form having a cross member 2 and a central limb 3 which is thickened at its junction with the cross member to provide an inclined surface 6 which together with a lateral arm 4 on the cross member 2 defines an inclined pocket 5 to receive the roofing felt. The upper surface of the central limb 3 may be ridged, serrated or corrugated outside the pocket 5. The outer face of the cross member 2 may be of shallow V section, or of ogee section or other ornamental form.
Patent GB-652190-A (GB)
Title: Improvements in or relating to sextant and other hatches
Inventor: EVERITT PHILIP FRANCIS
IPC: B64D43/00
Filed: 1948-10-05
Abstract: 652,190. Door-operating appliances. HUGHES & SON, Ltd., H. Oct. 5, 1948, No. 25909. [Class 65'(i)] [Also in Group XXXIII] In a device for operating a hatch cover and which is adapted first to move it downwards for a short distance parallel to its closed position and then to swing it to one side outward and downwards, the device effecting reverse movements on closing, final closing movement of the cover is effected by the straightening of a toggle, while the latter is kept broken during the downward and outward part of the movement by means which include a cam. As shown, the cover 18 of an instrument hatch in a pressurized aircraft, is carried by a pair of brackets 23, disposed one on each side of a hatch tube 16 and formed with forked ends which straddle fixed pins 26. To each bracket is pivoted at 28 one link 30 of a toggle, the other link 32 being pivoted on the pin 26 and the links being pivoted together at 34. The cover is operated by a shaft 41 carrying a link 40 pivoted at 39 to a link 38 which is mounted on one of the pivots 34. The toggle links 30 are formed with extensions 49 adapted to co-operate with cams 45 carried on the pins 26. The extensions ride off the cams when the cover is immediately below the opening, when further rotation of the shaft serves to move the cover vertically into contact with a packing ring 13. In a modification an operating link is pivoted directly to the lower toggle link and the cover is adapted to swing away from the operating shaft. Specification 653,716, [Group XXXIIII, is referred to.
Patent GB-229607-A (GB)
Title: Improvements relating to tobacco pipes
IPC: A24F1/08
Filed: 1924-11-01
Abstract: 229,607. Todisco, F. Nov 1, 1924. Tobacco pipes.-A plug 1 constructed as described in Specification 216,444 is adapted to engage with more or less clearance a spigot 5 in a chamber 2 formed in the stem 3 of the pipe. The plug is also provided with exterior grooves 6 permitting the drainage of saliva and other liquids into the chamber 2.
Patent GB-656073-A (GB)
Title: Improvements in or relating to cut-off mechanism for delivery mechanism of printing presses
IPC: B41F13/60
Filed: 1948-10-06
Abstract: 656,073. Rotary-blade cutting-machines. GOSS PRINTING PRESS CO., Ltd. Oct..6, 1948, No. 26059. Convention date, Dec. 13, 1947. [Class 31 (i)] [Also in Groups XVI and XXXII] A cut-off mechanism for the delivery mechanism of printing presses includes a cut-off cylinder 10 provided with a cut-off blade 15 projecting substantially radially between cheekwoods 20, 21, capable of limited radial movement relatively thereto, each cheekwood being biassed outwardly relatively to the blade by means of a laminated leaf spring 30 of bowed shape and means being provided for centring the spring with respect to the cheekwood while allowing limited angular tilting movement thereof. The spring comprises leaves 31 ... 35 secured together by a U-shaped clamp 40 having a lug 46 in engagement with an oversized hole 48 in the bottom of a channel in a knife bar 14. To prevent axial movement of the leaves, each leaf is provided with a convex offset portion while the clamp may include a dimple which engages the lowermost leaf 35. The knife bar 14 extends the length of a channel 11 in the cylinder 10 and is secured in position by a gib 16 retained in position by screws 17. The bar 14 is preferably formed of two L-shaped sections held together by bolts 14a and defining a channel 19 within which the blade 15 is positioned. The outward movement of the cheekwoods 20 and 21 is limited by pins 25 which engage slots 26 in the cheekwoods.
Patent GB-806239-A (GB)
Title: Purification of polyalkylphenols
IPC: C07C37/86
Filed: 1957-08-19
Abstract: The invention comprises a process for the separation of phenols substituted in at least both 2 and 6-positions by an alkyl group, from mixtures of them with other phenols, by heating the mixture with a trialkyl borate, the trialkyl borate reacting with phenols other than those substituted in the 2 and 6-positions, to produce phenol borate esters, and separating the diortho alkyl substituted phenols from these esters by conventional methods.  The trialkyl borate used should be such that the physical properties of the borate esters of phenolic impurities, formed during the process of the invention, are sufficiently different from that of the desired phenol, as to allow easy separation.  Suitable trialkyl borates are trimethyl borate, triethyl borate, tripropyl borate, tri-isobutyl borate, tri-normal butyl borate, and tri-(2-ethyl hexyl) borate.  The reaction is preferably carried out at temperatures above the melting-point of the mixture of phenols, e.g. about 70-175 DEG  C., preferably about 150 DEG  C., for about one hour, and it is preferable to use an excess of the trialkyl borate required to react with the active phenol. Examples are given of the separation of 2,6-ditertiary butyl-4-methyl phenol from (1) butyl-4-methyl phenol; (2) tertiary-butyl-3-methyl phenol; (3) 4-octyl phenol, using triisobutyl borate and (2-ethyl hexyl) borate.  The process of the invention may be carried out, e.g., in one step or in two separate stages, in the first of which the phenols and borate are reacted, and in the second, the fractional distillation of the reaction products is effected.  The phenols which have reacted with the trialkyl borates may be recovered by hydrolysis and purified for instance by steam distillation or any other suitable method.
Patent GB-1378485-A (GB)
Title: Process for surface fluorination of rubber articles
IPC: C08J7/12
Filed: 1973-06-01
Abstract: 1378485 Surface fluorination of rubber articles Z M NUDELMAN and I P PROKUDIN 1 June 1973 26291/73 Headings C3E and C3P A rubber article is subjected to surface fluorination by treating the article with a gas containing evaporated antimony pentafluoride and a carrier gas inert under the treating conditions and wasting the thus treated rubber article with an aqueous solution of an alkali metal carbonate. The treating gas may be generated by bubbling a carrier gas, e.g. air or nitrogen through liquid antimony pentafluoride, or by continuously evaporating a stream of liquid antimony pentafluoride introduced into a current of the carrier gas. Examples are given in which sealing cups and plates of butadieneacrylonitrile rubber, ethylene propylene rubber, chloroprene rubber, natural rubber of vinylidene fluoride-trifluorochloroethylene copolymer are fluorinated and then washed in aqueous sodium carbonate.
Patent GB-404408-A (GB)
Title: Improvements in printing machine
IPC: B41F1/38
Filed: 1932-09-22
Abstract: 404,408. Platen printing-machines. MILLIE PATENT HOLDING CO., Inc., 288, Southern Boulevard, New York, U.S.A. Sept. 22, 1932, No. 26350. Convention date, Sept. 23, 1931. [Classes 100 (i) and 100 (ii).] A platen printing-machine for printing on bands or tapes, more especially on such as are to be cut into tags after being printed on one or both sides, is constructed with a fixed platen 122, Fig. 4, and a reciprocating substantially cylindrical type head 8, Fig. 2, carried by an oscillating frame 6 operated by cranks on a shaft 5 and connecting-rods 10. The movement of the frame 6 is yieldingly resisted by a spring 20 connected by a rod 23 to an arm 24 fixed to the frame 6. The shaft 5 is driven from a power shaft 2. The type is inked by rollers 13 mounted in spring-pressed arms carried by a frame 14 which is moved around the head 8 by means of a chain 16 driven from the shaft 5 and passing over a sprocket concentric to the axis of the frame 6. The tape is fed forward by means of apparatus as in Fig. 3, not shown, and described fully in Specification 404,535. To prevent set-off when an impression is taken from a tape already printed on one side, a web of oiled paper 121, Fig. 4 is led around the platen 122 to prevent wiping off of the printed impression. The web 121 is led from a reel 120 over guide fingers 123, and is advanced by a roller 124 operated by a ratchet engaged by a reciprocating dog 127 operated from an oscillating part of the tape-feed mechanism. The web is wound up on a reel 126 driven by a friction belt 132 from the shaft 5. The Specification as open to inspection under Sect. 91 comprises also a construction of duct rollers for supplying ink to the rollers 13, and also a plate-clamping device for securing the printing-plate to the head 8. This subjectmatter, which does not appear in the Specification as accepted, now forms the subject-matter of Specification 404,534.
Patent GB-278720-A (GB)
Title: Improvements in or relating to current generators for use with internal combustion engines
IPC: H02K16/00
Filed: 1927-10-06
Abstract: 278,720. Soc. Anon. MagnÚto LumiÞre L. M. C. Oct. 6, 1936, [Convention date]. Casings ; machines with two or more armatures.-The casing a of an ignition magneto is provided with a removable cover for which may be substituted a second casing b containing a low tension generator for lighting, starting &c. The spindles of the two machines are connected by gearing which may take the form of gears e, i connected by gears g, h on a a, counter shaft f, the gear sliding on the shaft to disconnect the two machines.
Patent GB-1482259-A (GB)
Title: Purification of hgi2 for nuclear detector fabrication
IPC: C01G13/04
Filed: 1976-06-25
Abstract: 1482259 Zone refining mercuric iodide UNITED STATES ENERGY RESEARCH & DEVELOPMENT ADMINISTRATION 25 June 1976 [1 July 1975] 26442/76 Heading BIS [Also in Division Cl] A process for the purification of mercuric iodide, used for the growth of high-quality crystals, comprises the sequential steps of: synthesis of mercuric iodide from mercury and iodine, repeated sublimation of the synthetic mercuric iodide and zone refining of the resublimed material.
Patent GB-959000-A (GB)
Title: Improvements in or relating to video recording
IPC: H04N5/782
Filed: 1962-07-10
Abstract: 959,000. Recording television signals. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 10, 1962 [July 13, 1961], No. 26492/62. Heading G5R. A helical-wrap magnetic tape recorder which records complete fields on each oblique track, 9-11, has the wrap-angle reduced sufficiently below 360 degrees by guides 7, 8 to leave a blank region 12, the drive of the head-carrier 4 being so related to the field synch-pulses that the tape 6 is removed from the recording influence of the head 3 just before the synch-pulse is due. Alternatively, where the wrap is a full 360 degrees, the synch-pulses recorded in the region 12 (the sound and control-track region) are erased. The output of tachometric means (Fig. 4 not shown) in which a sensing magnetic head identifies the phase of an iron insert in a disc mounted on the headdriving means, is compared with the synch-pulses in the signal to be recorded to so phase the headdrive motor that the region 12 is correctly placed along one edge of.the tape. Compensating means eliminate pulses occurring due to the interruption of recording, comprising a self-oscillating demodulator on playback which generates an innocuous output during the interruptions of playback.
Patent GB-963636-A (GB)
Title: Improvements in or relating to filling valves for liquefied-gas lighters
IPC: F23Q2/52
Filed: 1960-07-29
Abstract: 963,636. Liquefied gas fuelled lighters. LA NATIONALE S.A. July 29, 1960 [Sept. 8, 1959], No. 26514/60. Addition to 726,982. Drawings to Specification. Heading F4F. The lighter of the parent Specification is modified by the omission of the hollow needle and by providing in the movable part of the filling valve a bore the outer end of which has a seal which ensures fluid tightness between the bore and a passage in the connecting piece of the filling vessel.