baber/WOPTO huggingface dataset:
Patent GB-1246806-A (GB)
Title: Process and apparatus for treating textile materials
IPC: D06B3/00
Filed: 1968-08-12
Abstract: 1,246,806. Textile treating apparatus. BURLINGTON INDUSTRIES Inc. 12 Aug., 1968 [6 Sept., 1967; 23 July, 1968 (2)], No. 38500/68. Heading D1L. In a process for treating textile material the material is initially vacuum degassed at a pressure between zero and 10 inches of mercury absolute, and then immediately treated with a fluid treating agent on leaving the vacuum degassing zone, for dyeing, scouring, resin treating or mercerising, whereby the penetration and pick-up of the treating agent by the material is increased, the entrance and exit of the evacuating zone being sealed to maintain evacuation and prevent entry of the treating fluid into the zone. In one embodiment a continuous length of material 10 is passed vertically through an evacuated chamber 4 having entry and exit sealing rolls 12, 14. The material is preferably exposed to a vacuum of 0.6 to 3.5 inch mercury absolute for from 1 to 15 seconds. On being withdrawn from the vacuum chamber 4 the material is immediately passed through the treating liquid 20 located in the nip of the upper sealing rolls 14, and thence between padder rolls 22. The pressure between the sealing rolls 12 or 14 is adjustable by moving one roll relative to the other. In alternative embodiments the treating liquid is located in a separate chamber immediately adjacent the exit from the vacuum chamber and the seals of the vacuum chamber may be cooperating rubber flaps or inflated non- rotating tubular members. To further improve the penetration and pick-up of the material it may be heated during its passage through vacuum chamber to from 50 to 150C such as by infra-red or dielectric heaters or by passage over heated rollers. Also the material may be passed through the vacuum chamber zig-zag fashion over rollers, and the vacuum chamber may be horizontally arranged or may be spherical. In yet a further embodiment the vacuum treatment is carried out at 0C. In an alternative embodiment the continuous length of material is first passed through an additional treating agent 50, then vacuum chamber 4 (Fig. 10) in a zig-zag manner during which it is heated by heaters 55, and is then passed through the main treating chamber 59. The treating agent may be a liquid or a gas. Several specific examples are given.
Patent GB-1478320-A (GB)
Title: X-ray generator
IPC: H05G1/52
Filed: 1974-09-03
Abstract: 1478320 X-ray tubes MACHLETT LABORATORIES Inc 3 Sept 1974 [4 Sept 1973] 38532/74 Heading H1D An X-ray generator comprises target 38A on X-radiation transparent substrate 36A, source 40A to produce electrons to excite X-radiation from the target surface on substrate 36A and an X-radiation opaque housing 94 (e.g. of Pb) with a window, the substrate at its adjacent target surface being so inclined to the axis that X- rays emitted along the axis are at angles to the normal to the said target surface in the range 80 to 85 degrees. Brehmsstrahlung radiation is attenuated in the axial direction due to the increased path through the inclined substrate. Zone plates of chirpped checkerboard pattern or off-axis Fresnel pattern are mentioned, and attached zone plate 69 may be a Pb containing deposition on a substrate. The conical substrate may be re-entrant (Fig. 2, not shown) and magnets 162, 164, may replace modulation grid 74, and the electrons may scan a raster or spiral thereby smoothing out effects of beam irregularities. The target may be 20-40Á thick and Mo and Ce fluorescent and brehmsstrahlung emissions are discussed w.r.t. Figs. 3, 4 (not shown). Au or W targets are also disclosed. Fig. 1 also includes insulating oil 96, tube base 100 of which substrate 36A forms a part, and glass envelope 98. Diagnostic angiography is discussed utilizing iodine as radiographic dye.
Patent GB-1254362-A (GB)
Title: A method of providing ohmic contacts on gallium arsenide
Inventor: KING GEORGE
IPC: H01L47/00
Filed: 1969-08-01
Abstract: 1,254,362. Semi-conductor devices. STANDARD TELEPHONES & CABLES Ltd. 29 July, 1970 [1 Aug., 1969], No. 38730/69. Heading H1K. An ohmic contact is made to a gallium arsenide body by depositing a contact material on the body, and subsequently alloying it to the body in the presence of arsenic vapour. An inert or reducing gas, e.g. hydrogen, may also be present, the arsenic vapour being provided from an arsenic metal source heated to between 350 and 400 C. The alloying process may take place at 610 C., in not more than five minutes. The contact material may be a layer of tin followed by a layer of silver, both deposited by evaporation at a pressure of less than 10<SP>-5</SP> torr, or by sputtering. The body may be thoroughly cleaned prior to contact material deposition. The device, which may be a Gunn-effect oscillator, may be bonded at one contact to a copper heat sink, again in the presence of arsenic vapour.
Patent GB-957255-A (GB)
Title: Improvements in or relating to polysiloxanes
IPC: C09K3/10
Filed: 1962-10-12
Abstract: Siloxanes in which the molecules are essentially of the general formula: <FORM:0957255/C3/1> in which each R is a monovalent radical of less than 9 C atoms and is a haloaliphatic hydrocarbon radical having no halogen on the C alpha to the oxygen or an aliphatic hydrocarbon radical, each R1 and each R11 is a monovalent radical of less than 19 C atoms and is a hydrocarbon (saturated or unsaturated), halohydrocarbon or cyano-alkyl radical, n is 2 or 3, y has an average value from 1.90 to 2, z has an average value from 1 to 1.10, the sum of y+z is 3, and x has a value of at least 7, may be made (1) by reacting a siloxane of the formula: <FORM:0957255/C3/2> with a silane of the formula R13-n(RO)nSiC in the presence of a hydrogen halide acceptor; (2) by reacting the corresponding halogen terminated siloxane with an alcohol, ROH, (in the presence of a hydrogen halide acceptor), or with (3) an alkylene oxide; or (4) by reacting, in the absence of moisture the hydroxylated siloxane of (1) with a silane of the formula R14-aSi(OR)a, where a is 3 or 4, in the presence of a catalyst for the reaction of ­Si-OH with ­SiOR, e.g. amines and metal carboxylates.  The siloxanes may be mixed with conventional fillers and curing catalysts, exposed to moisture and allowed to cure to rubbers. Catalysts exemplified are metal carboxylates, titanium esters, amines, amine salts, quaternary amine salts and alkali metal salts. In a typical example (1) a mixture of a liquid hydroxy-terminated dimethylpolysiloxane, toluene and pyridine was added to SiCl4 in toluene to form a chlorine-terminated siloxane; methanol was then added and the reaction mixture was agitated for 30 minutes to yield, after removal of pyridine hydrochloride and solvent, a siloxane of the formula: <FORM:0957255/C3/3> which was stable in the absence of moisture even when mixed with di-n-hexylamine, but the mixture cured to a rubber when exposed to atmospheric moisture.  Uses:  as coating compositions, sealants, caulking materials and electrical insulation.  Specification 762,819 is referred to.
Patent GB-1320524-A (GB)
Title: Continuous tone facsimile transmission
IPC: H04N1/405
Filed: 1970-08-12
Abstract: 1320524 Copying by scanning XEROX CORP 12 Aug 1970 [15 Aug 1969] 38774/70 Heading H4F A facsimile transmission system employs, for producing half-tone effects, a form of pulsewidth modulation obtained by adding a relatively high-frequency triangular sawtooth signal to a signal from the document scanner, and transmitting a signal at 1 level wherever the sum exceeds a fixed threshold and at O level otherwise.
Patent GB-1387428-A (GB)
Title: Filtering system
Inventor: GOLDING LEONARD S
IPC: H04N7/46
Filed: 1972-01-11
Abstract: 1387428 Active filters; frequency selective amplifiers COMMUNICATIONS SATELLITE CORP 11 Jan 1972 [11 Jan 1971] 38930/74 Divided out of 1387427 Headings H3U and H3W A filter system for separating unwanted energy at odd multiples of frequency H/2 in a frequency band A 1  to A 2  (A 1 <A 2 ) from wanted energy at harmonics of frequency H up to frequency A 2  comprises means for comb filtering the entire band up to frequency A 2  to extract the unwanted energy, a band-pass filter for passing all the unwanted energy between frequencies A 1  and A 2  and means for subtracting the band passed unwanted energy from the original signal. The band-pass filter output is preferably constant within 3 db. through the pass-band and the filter incorporates a phase equalizer so that it has a linear phase shift characteristic (Fig. 7). As shown (Fig. 5) the input signal is delayed by H1 and fed to the plus input of differential amplifier 30. To the other amplifier input is supplied the sum of the input signal and the input signal delayed by 2H. The output of amplifier 30 has the desired comb characteristic and is band-pass filtered and subtracted at 34 from the input signal delayed by H plus a delay 35 equal to that of the band-pass 32. The filter may be used for separating luminance and chrominance signals in a NTSC TV signal or for removing sampling energy interleaved in a PCM system operating at less than the Nyquist frequency. A low-pass filter with phase equalization (Fig. 8) for use in such a system is also described.
Patent GB-1114428-A (GB)
Title: Improvements in the production of flexible polyurethane foams
IPC: C08G18/16
Filed: 1965-09-13
Abstract: 1,114,428. Flexible polyesterurethane foams. UNION CARBIDE CORPORATION. 13 Sept., 1965 [14 Sept., 1964], No. 38960/65. Headings C3C and C3R. Flexible polyesterurethane foams are prepared by foaming and reacting a mixture of: (1) a polyester having at least 2-OH groups per molecule and an -OH number of 45-150; (2) a polyisocyanate (3) a minor amount of a blowing agent and (4) for each 100 parts by wt. of polyester and polyisocyanate, from 0À15 to 4 parts by wt. of a surfactant-catalyst mixture comprising either (A) (i) a siloxane-oxyalkylene copolymer having a M.W 3000-17,000, a siloxane content of 14-42% by weight and an oxyethylene content of at least 75% by weight of the oxyalkylene groups, said copolymer having a siloxane portion of formula: where R is a monovalent hydrocarbon group or divalent organic group, b is 1 to 3 inclusive, at least one group R being a divalent organic group and each divalent organic group linking the siloxane group to an oxyalkylene portion of the copolymer; and (ii) a catalyst whose catalytic activity for the production of urethanes is greater than that of N-ethyl morpholine; or (B) (i) a siloxane-oxyalkylene copolymer having a M.W. 3000-7000, having a siloxane content of 14-20% by weight and an oxyethylene content of at least 75% by weight of the oxyalkyene groups, said copolymer having a siloxane portion of formula as defined above, and (ii) a catalyst having a catalytic activity for the production of urethanes equal to or less than that of N-ethyl morpholine. The catalyst in (4) (a) may be triethylamine, N,N,N<SP>1</SP>,N<SP>1</SP>-tetramethyl-1,3 butane diamine, triethylene diamine, dimethylethanol amine, dibutyltin dilaurate, dibutyltin di-2- ethylhexoate, stannous ootoate or stannous oleate. The catayst in (4) (b) may be N-methyl morpholine, N ethyl morpholine, hexadecyl dimethyl amine, a dimethyl benzyl amine, or N-cocomorpholine.
Patent GB-934871-A (GB)
Title: Improvements in or relating to circuits for effecting differential amplification of different frequencies
Inventor: JAMES IVANHOE JOHN PENFOUND
IPC: H04N5/208
Filed: 1958-12-04
Abstract: 934,871. Correcting networks. ELECTRIC & MUSICAL INDUSTRIES Ltd. Dec. 3, 1959 [Dec. 4, 1958], No. 39080/58. Class 40 (8). [Also in Group XL (c)] A variable gain-frequency response circuit comprises a delay line, correctly terminated at one end and open at the other, connected to the output of an amplifier which supplies antiphase signals to the two ends of the line, and a variable resistive path bridging at least a portion of the delay line. The circuit may be used for correcting aperture distortion of a television signal. The signal to be corrected is applied to the input of a " long-tailed pair " 1, 2 between the anodes of which are connected a delay network comprising capacitors 6 and two mutually coupled inductors 7. The anode of valve 2 is connected to the junction of two resistors 8, 9 which together are equal to the characteristic impedance of the line, and the output is taken via a capacitor 14. In order to adjust the amount of correction, a variable resistor 11 in series with a fixed resistor 12 is connected between the ends of the line. The delay network may be replaced by a distributed type delay line. Specification 789,934 is referred to.
Patent GB-370389-A (GB)
Title: Improvements in or relating to electrical transformers or similar inductive apparatus
IPC: H01B3/32
Filed: 1930-12-29
Abstract: An impregnating composition used for cementing together the core laminations and coils of inductive electrical apparatus to prevent hum comprises 70 per cent resin and 30 per cent asphalt applied at a temperature of 160-175 DEG  C.  Specification 7190/93, [Class 38, Electricity, Regulating &c.], is referred to.
Patent GB-1271948-A (GB)
Title: Roofing elements
Inventor: ELVIN JOHN DANIEL FREDERICK
IPC: E04D13/147
Filed: 1968-08-16
Abstract: 1,271,948. Chimney and like flashings. OSMA PLASTICS Ltd. 24 June, 1969 [16 Aug., 1968] No. 39380/68. Heading F4J. A pipe projecting through a sloping roof is sealed thereto by an element of elastomeric material, e.g. neoprene comprising an apertured plate 2 integral with an angled wall 3 and a sleeve 4, the latter being formed with ribs 5 for gripping the pipe. The element is designed for a roof of average pitch, viz. 26 degrees, but roofs with a pitch range of 19-35 degrees can be accommodated by the flexure points 8, 9 and 10.
Patent GB-962611-A (GB)
Title: Feed mechanism for a machine tool support
IPC: B23Q1/60
Filed: 1962-10-19
Abstract: 962,611. Gear-machining. MICHIGAN TOOL CO. Oct. 19, 1962 [Dec. 18, 1961], No. 39685/62. Headings B3K and B3L. [Also in Division F2] A machine tool, such as a gear-shaping or finishing machine, comprises a slide 15 operatively connected to one of two nut and screw members 47, 65, means 57 for adjustably holding one member in a predetermined angular position, means for holding the other member against rotation during adjustment of the first, and means 69 for successively rotating the other member. The slide may be the knee 15 of a gear-shaving machine carrying the cutter 16. A nut 19, secured to a tubular member 21 sliding in a sleeve 22, co-operates with a screw 18 which may be rotated by a hand wheel 23 to adjust the slide vertically. The member 21 rests on a wedge 33 supported on a wedge 31 which moves in roller bearings. Movement of the wedge 31 by a fluid-pressure device 45 thus raises or lowers the saddle 15, the upper movement being limited by a stop 49 adjusted by the screw 47. Initially, the screw 47 is rotated within the nut 65 by a knob 63 rotating a worm engaging the wheel 57, the nut being held by a spring 90 and shoulders on the nut 65 and a bushing 67. The initial setting is indicated by a dial 98. Fine feed is imposed by a fluid-operated pawl moving the ratchet wheel 69 to rotate the nut 65. A knob 81 can be rotated to set a stop to determine the feed movement for each stroke of the ratchet. The ratchet is returned by the spring 90 when the work is lowered. The tool is fed upwards after each of several passes, the finishing passes being made without feed.
Patent GB-942714-A (GB)
Title: Improvements in optical measuring apparatus
IPC: G01B11/04
Filed: 1961-11-07
Abstract: 942,714. Optical gauging apparatus. GENERAL ELECTRIC CO. Nov. 7,1961 [Nov. 29, 1960], No. 39758/61. Heading G1M. In optical gauging apparatus, particularly for gauging the width of a moving strip, the shadowimage of the top edge (as seen in Fig. 1) of the strip 11, is imaged by a lens 16 at unit magnification adjacent the lower edge, and with the same orientation, so as effectively to form a narrow slit. Deviations in the position of the top edge due, for example, to variation of the strip width, will thus produce a large percentage change in the amount of light reaching the photo-cell 18. The optical path includes reflecting prisms 14 and 15, and a lens 13 which images the lamp 12 on lens 16, the latter imaging lens 13 on a lens 17 identical and symmetrically placed with lens 13. (The two 90-degree reflections offset the 180-degree object-image rotation produced by lens 16 and the top edge of the strip 11 and its image adjacent the lower edge thus have the same orientation.) Bodily movement of the strip in its own plane will have no effect on the "slit" width. Gauge 19 responding to the amplified, or unamplified, output of photo-cell 18 may be calibrated to read actual width or to give error readings. The separation of the lower edge of the strip and the image of the top edge may be controlled by transverse movement of the lens 16 using the screw shown. In the embodiment of Fig. 3 an additional pair of Albrecht rhombs 21,22 is included to allow measurement of wider objects keeping the separation of prisms 14 and 15 constant. The outer ends of the rhombs may be brought closer together, for measurement of smaller objects, by pivoting them about axes passing through the points 25, 26 parallel with the axes of lenses 13 and 17. The positions of lenses 13 and 17 (which are almost half-obscured by the test object) and of lamp 12 and the photo-cell 18 must be adjusted accordingly.
Patent GB-1108779-A (GB)
Title: A process for the production of tetracycline by fermentation
IPC: C12P29/00
Filed: 1965-09-17
Abstract: Tetracycline is produced by the submerged fermentation in a liquid medium containing assimilable carbon and nitrogen and inorganic salts under aerobic conditions of micro-organisms of the genus Streptomyces capable of producing both chlorotetracycline and tetracycline, by the addition to the fermentation medium of at least one chlorination inhibitor corresponding to the general formula <FORM:1108779/C2/1> wherein Z is H, OH or Cl; X is halogen, preferably Cl or iodine, or is akyl, aryl, H, NH2 or NO2; and Y is H, Cl, NH2 or COOH. Alternatively, X and Y may be members of a second 5- or 6-membered aromatic or heterocyclic ring e.g. 2,6 - dichloro - 7 - methyl purine.  Other specified inhibitors are 2,4-dichloro-pyrimidine, 5 - iodo - 2,4 - dichloro pyrimidine, 5 - methyl-2,4,6 - trichloro - pyrimidine and 5 - methyl-2,4-dichloropyrimidine.
Patent GB-1362825-A (GB)
Title: Distillation process and apparatus with integral heat transfer between rectifying and stripping sections
IPC: B01D3/14
Filed: 1971-08-25
Abstract: 1362825 Fractional distillation TREADWELL CORP 25 Aug 1971 [21 Sept 1970] 39959/71 Heading B1B [Also in Division F4] A process for the separation of liquids of different volatilities, e.g. propane and propylene with multiple rectification and stripping stages has feed entering between the stages and indirect heat exchange between at least some of the rectification zones and some of the stripping zones. The pressure in the rectification is controlled at above that in the stripping so that a substantial flow of heat can be effected between the two stages. Figs. 5 and 5A show the rectification and stripping zones in a 16-stage fractionation system. Ambient air is compressed to 3.26 atoms and is then passed through cooler and a coil in heat-exchange H/E-O and introduced into stage 8. Vapour is withdrawn from each stage and passed through a compressor C and a heat exchange H/E into the next higher stage. Nitrogen vapours from the uppermost stage flow through compressor C1 and heat exchanger H/E-1 and are then passed through a coil in the oxygen vaporiser below the lowermost stage. Some of the nitrogen condensate is returned to stage 1 as reflux and the remainder is expanded in compressor C-O and passed down through heat-exchangers H/E and turbines E which drive the compressors C. The transfer of heat by an auxiliary liquid is described.
Patent GB-1499470-A (GB)
Title: Golf clubs of the wood type
IPC: A63B53/04
Filed: 1976-09-27
Abstract: 1499470 Golf clubs PEPSICO INC 27 Sept 1976 [20 Feb 1976] 40013/76 Heading A6D [Also in Division C7] A wood-type golf club head 10 has a recess formed in its striking surface 11 and a metallic insert 19 located in the recess, an open ended passageway 26 extending through the entire vertical extent of the insert. The passageway may be of elongated rectangular cross-section, Fig. 5 (not shown). Grooves 24 formed in the insert form continuations of grooves formed in the unrecessed part of surface 11. The composite striking surface is part-spherical. Compositions of alloys from which the insert can be made are given. The insert may be secured by epoxy adhesive. The upper and lower edges of the insert may be slightly spaced from the corresponding surfaces of the recess.
Patent GB-1173155-A (GB)
Title: Improvements in or relating to Ion Chambers
Inventor: RHODES JOHN RATHBONE
IPC: H01J47/02
Filed: 1966-09-08
Abstract: 1,173,155. Radiation detector. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Sept. 1, 1967 [Sept. 8, 1966], No. 40108/66. Heading G1A. [Also in Division H1] In a measuring head comprising a differential ion chamber 2 having spaced positively and negatively polarized electrodes 5 and a substantially central collecting electrode 4, and an access window 3, each half of which is associated with a filter of a balanced differential pair 6, 7, one or more sources 10 are mounted on the outward side of a shield 8 covering a central portion of the window so that back scatter from a sample irradiated therby passes through the filters and enters the respective spaces between the positive and negative electrodes and the central electrode, and the charge on the central electrode indicates the difference directly. The electrodes may be semicylindrical in form and the spaces may be filled with argon. A thin rear window permits the escape of high energy radiation and may with the front window comprise aluminized plastic sheet. The apparatus is described in connection with measuring a hot dipped galvanized zinc coating on steel, and for this purpose copper and nickel filters are exemplified.
Patent GB-1001881-A (GB)
Title: Process for modifying calcium carbonate
IPC: D21H19/64
Filed: 1961-11-10
Abstract: Modified calcium carbonate is obtained by heating at a temperature higher than 50 DEG  C. a suspension of calcium carbonate together with an aqueous solution of an alkali carbonate, which is defined as being sodium carbonate, potassium carbonate or ammonium carbonate and which is present in an amount sufficient to provide from 1 to 50% by weight of the alkali carbonate based on the calcium carbonate; the modified calcium carbonate being then separated from the liquid and dried.  The modified calcium carbonate thus produced, can be used to produce aqueous suspensions of calcium carbonate containing at least one part of calcium carbonate to one part of water, these suspensions have a uniform flowing power.
Patent GB-1367312-A (GB)
Title: Process for the continuous hydrogenation of oils and fats
IPC: B01J27/185
Filed: 1971-08-27
Abstract: 1367312 Hydrogenation of oils and fats TUKOVY PRUMYSL 27 Aug 1971 [1 Sept 1970 (2)] 40376/71 Heading C2C [Also in Division C5] Oils containing glycerides of mono-unsaturated and polyunsaturated fatty acids, unsaturated fatty acids and unsaturated fatty alcohols containing from 10 to 30 carbon atoms in the molecule are hydrogenated by preheating and then trickling downwards as a film over a fixed bed of catalyst in the presence of hydrogen. The catalyst comprises from 5 to 85% nickel on a carrier and the molar ratio of reduced nickel to nickel oxide is between 20 : 1 and 1À5 to 10. The temperature of the hydrogenation is between 60‹ and 260‹ C., the pressure between 0À2 and 10 atmospheres and the LHSV between 0À2 and 10. The catalyst may be prepared according to Czechoslovak Specifications 111,791 and 130,468 and may be sulphided or phosphided. The carrier may be diatomite. The materials hydrogenated in the examples are deacidified and bleached sunflower oil, olein, oleyl alcohol and sunflower oil.