baber/WOPTO huggingface dataset:
Patent GB-1257990-A (GB)
IPC: G02F1/37
Filed: 1969-05-06
Abstract: 1,257,990. Light modulators. UNION CARBIDE CORP. 6 May, 1969, No. 23075/69. Heading H4F. [Also in Division G2] The intensity of frequency doubled radiation derived by passing radiation of a fundamental frequency from a laser 10 through a crystal 13 is sensitive to mismatching of the refractive indices exhibited by the crystal to the ordinary fundamental frequency rays and the extraordinary doubled frequency rays, due to imperfect temperature control or variations in other parameters affecting the optical properties of the crystal. In the present invention an electric field provided across the crystal normal to the optical path may be varied to vary the refractive indices of the crystal and so modulate the doubled frequency output. To produce maximum output, a probe signal f p  from 25 is modulated on a bias voltage from 18 and applied to electrodes 14, 15, and the modulated light output reflected from a beam splitter 22 is detected at a photo-tube 23. A detector 24 compares the probe signal f p  and the output of tube 23 and provides a feedback signal of polarity and magnitude indicative of any shift in the intensity of the radiation output which controls the bias source 18 to compensate therefor. By adding a D.C. component to the feedback signal any desired operating point on the radiation outputapplied voltage curve may be attained, Fig. 2 (not shown). An information signal f i  from 19, of substantially greater frequency than signal f p , may also be supplied to electrodes 14, 15, in which case the operating point is preferably a point of inflection on the output-voltage curve for maximum modulation efficiency. Alternatively, simple on-off modulation of the output -signal may be effected. In the example given, crystal 13 is of lithium niobate and laser 10 is a neodymium doped Y1G laser with a fundamental wavelength of 1À06 Á.
Patent GB-1259256-A (GB)
IPC: F16L11/112
Filed: 1970-09-17
Abstract: 1,259,256. Plastics hoses. TECHNOCHEMIE KESSLER & CO. G.m.b.H. 17 Sept., 1970 [20 Sept., 1969; 18 Oct., 1969], No. 44367/70. Heading F2P. A flexible plastics hose comprises a plastics inner tube 5 carrying longitudinal reinforcing threads 6 which may be plastics filaments, a reinforcing plastics coil 11 surrounding the tube 5 and threads 6, and an outer plastics tube 12. The plastics tubes and coil may be extruded and the parts welded together during extrusion. The reinforcing threads 6 may be replaced by a wide-mesh braided fabric (7) (Fig. 5, not shown). In other embodiments the cross-section of the coil 11 may be circular or segmental. The outer tube 12 may be smooth with the cavities between adjacent turns of coil 11 filled with a plastics foam (13) (Fig. 4, not shown).
Patent GB-1264613-A (GB)
IPC: H01J3/02
Filed: 1968-03-19
Abstract: 1,264,613. Electron beam apparatus. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 13 March, 1969 [19 March, 1968], No. 13289/68. Heading H1D. An electron beam generating device of the glow discharge type, e.g. as described in Specification 1,145,013, comprises a chamber, a chamber inlet for admitting gas to the chamber during operation of the device, a separate chamber outlet for removing from the chamber gas so admitted thereto so as to reduce pressure in the chamber during operation of the device, at least two electrodes disposed within the chamber, and heating means for heating at least one of said electrodes, other than for initiating thermionic emission, to a temperature at which contamination of the said one electrode is substantially inhibited. The heating means is preferably in the form of an electrical resistance which may be built into or attached to the electrode or structure adjacent the electrode so as to raise the temperature of the electrode and/or the environment around the electrode. Alternatively radiant heat may be applied to the wall of the chamber. The electrode may be a cathode which is heated to a temperature of over 200‹ C. and preferably up to 300‹ C., or may be an anode or other electrode for modulating, deflecting, or focusing the electron beam. The gas may be air, argon, hydrogen or helium which is pumped down to a pressure of a few microns of mercury.
Patent GB-1265208-A (GB)
IPC: F04C28/06
Filed: 1969-04-21
Abstract: 1,265,208. Rotary vacuum pumps. GENERAL ENG. CO. RADCLIFFE Ltd. March 26, 1970 [April 21, 1969], No.20284/69. Heading F1F. In an oil sealed sliding vane rotary vacuum pump 1, lubricating and sealing oil is supplied to the pump interior from a reservoir 31 via a plurality of radial passages normally closed by spring- loaded balls, and formed in a sleeve 22 mounted on an extension 35 of the pulley driven pump shaft 4. The balls are removed from their seats by centrifugal action, and oil is drawn by the reduced pressure in the pump, via passages 33, 36, 37 in the shaft 4 and 18 and 9 in the pump casing, to pump bearings 8 and 32. The pump outlet valve 13 is immersed in a secondary reservoir 14 whose rim is above the level of oil in the reservoir 31 so that failure of the valve 13 would lead to only a small amount of oil being drawn into the pump.
Patent GB-1266332-A (GB)
IPC: B01D11/04
Filed: 1968-03-15
Abstract: 1,266,332. Contacting immiscible fluids. NATIONAL RESEARCH DEVELOPMENT CORP. 11 March, 1969 [15 March, 1968], No. 12715/68. Headings B1F and B1R. A process for contacting immiscible or partially miscible fluid phases comprises flowing the fluid phases between at least a pair of surfaces having "opposite wetting characteristics" with respect to the fluid phases, the surfaces being spaced apart so as to promote flow of the fluid phases on the surfaces in the form of films which are in contact with each other. "Opposite wetting characteristics" means that each surface is preferentially wetted by at least one different one of the phases. The phases may be two liquids or a liquid and a gas. The flow may be pulsed. One of the surfaces may be glass, stainless steel, vitreous enamel or phosphor bronze. The other surface may be P.T.F.E., polyethylene or carbon. The plates may be between 1.6 and 0.008 inches apart.
Patent GB-1266624-A (GB)
IPC: B01J35/02
Filed: 1969-09-22
Abstract: 1,266,624. Oxidative esterification catalysts. KNAPSACK A.G. 22 Sept., 1969 [24 Sept., 1968; 22 Oct., 1968], No. 46567/69. Heading B1E. [Also in Division C2] Catalyst compositions for the preparation of unsaturated esters of carboxylic acids (see Division C2), comprise one or more palladium compounds on a carrier in which at least 80% of the carrier particles have a diameter between 0.1 and 1.5 mm. Optional activators are alkali metal or alkaline earth metal carboxylates, alkali metal hydroxides and carbonates. Other alkali metal or alkaline earth metal compounds yielding carboxylates, and compounds of copper, gold, zinc, cadmium, tin, lead, manganese, chromium, molybdenum, tungsten, uranium, iron, cobalt, nickel, niobium, vanadium, and tantalum. The carriers include silicic acid, kieselguhr, silica gel, diatomaceous earth, aluminium oxide, silicate and phosphate, pumice, silicon carbide, spinels, asbestos or active carbon. Silicic acid catalyst is preferred. Examples describe the preparation of vinyl acetate, propionate and butyrate and alkyl acetate.
Patent GB-1288924-A (GB)
IPC: H01B7/22
Filed: 1969-11-13
Abstract: 1288924 Cable armourings COMPAGNIE FRANCAISE THOMSON HOUSTON-HOTCHKISS BRANDT 13 Nov 1969 [14 Nov 1968 7 Feb 1969 28 March 1969] 55742/69 Heading H1A [Also in Division B8] An electric cable comprises a central assembly 2 of insulated conductors surrounded by a concentric metal conductor or armouring 3 constituted by one or more metal strips (Figs. 3-9, not shown) provided with perforations in the form of holes, slots or slits at least some of which are formed in the edges of each strip. The armouring or conductor 3 may be of a tubular sheath wound around its longitudinal axis as shown or of several metal strips (105, Fig. 11, not shown) arranged with their longitudinal edges overlapping or arranged in super-imposed layers (136-139, Fig. 14, not shown) and staggered. The metal strips may be provided with covering sheets 4, 5 of an adhesive plastics material of greater width. The slits or slots may have a depth equal to three-quarters of the width of the strip and a spacing of one-third the width. A process for making the cable as shown in Fig. 13 comprises the steps of twisting the individual conductors 102 at a fixed die 113 to form the central assembly, of applying metal strips 105 around the assembly according to a comparatively long pitch to form the armouring and of winding ribbons 106 around the composite of assembly and strips which is displaced by a drawing caterpillar 114 towards a storage reel 116. An outer protective sheath may be applied if desired and the cable may be non-sealed or sealed by a foam or any sealing compound. The apparatus of Fig. 10 (not shown) includes an arrangement for pre-forming the perforations in the metal strips used for the armouring and of applying adhesive plastics layers on either side of the strips.
Patent GB-1295972-A (GB)
IPC: B25B27/20
Filed: 1970-07-28
Abstract: 1295972 Circlip pliers WALDES KOHINOOR Inc 28 July 1970 36485/70 Heading B4W Ratchet pliers for engaging circlips comprise lever arms 10, 12 pivoted at 14, the arms having handles 24, 26 attached thereto; a curved ratchet segment 30 being pivoted at 36 to handle 24 and remaining between the handles for all positions of the pliers, the segment having ratchet teeth on either side for engagement with pawls 32, 34 and engages a stepper lever 46 via pin 52 and slot 54. Lever 46 is spring biased by a torsion spring having arms 50a, 50b so that one of the teeth 30a is in engagement with pawl 32 to lock the pliers in a given position. In operation, the pliers shown are for use with a circlip that has to be contracted to be removed or fitted. After such a contraction the pliers are opened to release a circlip in a step-by-step operation carried out by successive depressions of the stepped lever 46 so that the ratchet teeth are moved past the pawls. For circlips that are to be opened for removal or fitting, the lever arms of the pliers do not cross. To cater for the effect of the curvature of segment 30 and its changing centre of curvature during opening, the teeth 30b on the convex side of the segment are staggered from those on the concave side and also have variable spacing with respect to one another. The teeth on the concave side are equally spaced apart.
Patent GB-1296748-A (GB)
IPC: H01L47/02
Filed: 1970-06-16
Abstract: 1296748 Making bearing SKF KUGELLAGERFABRIKEN GmbH 16 June 1970 [19 June 1969] 29194/70 Heading B3A [Also in Divisions D1 and F2] A footstep bearing for spinning and twisting spindles comprises a support 10 having a cavity 14 in which is located a bearing sleeve 22. The sleeve is a single sheet of metal which is a press fit in the cavity, and has a cylindrical portion 24 with a conical portion below it. The support may be of plastics or steel, and the sleeve is preferably a thin walled sheet of bronze or bronze alloy. The bearing is made by forming the cavity in the support, inserting the metal sleeve and cold working the sleeve in the cavity with a shaped mandrel so that the sleeve assumes the shape of the cavity.
Patent GB-1297358-A (GB)
IPC: B23F19/10
Filed: 1971-09-08
Abstract: 1297358 Hobbing WAHLI FRERES SA 8 Sept 1971 [9 Sept 1970] 41985/71 Heading B3K A method of milling, bevelling, and deburring straight or helical toothed wheels by means of hobs, comprises rotating a milling hob 1 in synchronism with a workpiece 2, moving the hob radially from position 4 into contact with the workpiece, producing an outline of teeth on the workpiece, moving a bevelling and deburring hob 6 radially to operate on the workpiece at the end 5, withdrawing hob 6, moving hob 1 along the workpiece to complete milling of the teeth on the workpiece and releasing hob 1 and moving it back to position 4. When producing straight teeth, hob 6 can be moved to deburr the teeth at end 8. Hob 6 may be adapted to deburr and bevel the bottom and sides only of the teeth, or the top of the teeth may also be included.
Patent GB-1297424-A (GB)
IPC: D04B15/66
Filed: 1970-05-13
Abstract: 1297424 Patterning ELLISON TUFTING MACHINERY Ltd 1 June 1971 [13 May 1970] 23140/70 Headings DIG and DIE A tufting or other textile machine is controlled from a pattern 4 by a fibre optic light guide device comprising a plurality of terminals 5 disposed in a common bar 8 adjacent the pattern 4, each terminal containing the one end of light guides 3 and 7 the other ends of which are respectively adjacent a light source 1 and a respective photocell 6 which acts upon the control mechanism of the textile machine. The light guides each comprise a plurality of fibres in a flexible sleeve and the photocells are sensitive to light reflected from the pattern 4.
Patent GB-1303146-A (GB)
IPC: F42C15/31
Filed: 1970-08-18
Abstract: 1303146 Combustion gas generators IMPERIAL METAL INDUSTRIES (KYNOCH) Ltd 14 July 1971 [18 Aug 1970] 39733/70 Heading F1L The invention relates to a combustion gas generator in which gas under pressure is generated by firing a solid cordite charge. The apparatus comprises a casing 10 closed at its lower end by an integral closure 17 and at its upper end by a closure 52 located by a circlip 53. An inlet bore 20 is provided through the closure 17 and an outlet bore 56 through the closure 52. A sleeve 27 is disposed within the casing 10 being secured therein by shear pins 23, the valve being formed with a recess 25 in which is located a piston 29 which is secured to the valve by a shear pin 32. The sleeve valve is formed at its upper end with an annular knife edge 28 which is adapted upon upward movement of the valve to engage a soft metal ring 35 so as to form a seal. The casing is formed with outlet vents 21 which are initially closed by dust caps 58, the vents being closed by the sleeve valve when it moves to its upward position. A member 34 is fixedly mounted within the casing and is provided with a stepped bore in which is contained a percussion-operated priming charge 45, a black powder igniter 48, a thin bursting disc 49, a wire cage spacer 50 and a main cordite charge 51 of tubular form. The member 34 is formed with radial bores 43 which are aligned with the outlet vents 21 in the casing. When the gas generator is to be operated, gas under pressure is admitted through the inlet 20 whereupon pins 23 shear and the sleeve valve moves to its upward position closing off the vent outlets 21 and forming a seal with the soft metal ring 35. The pin 32 then shears and the percussion piston 29 moves upwardly so that the nose 31 on the upper surface of the piston strikes the priming device 45 which causes ignition of the ignitor 48 which in turn fires the main cordite charge 51. The pressure gases generated discharge through the outlet 56 to the actuator not shown. The vent outlets are provided so as to release the gas should the charge be accidentally ignited,
Patent GB-1309072-A (GB)
Title: Building construction and elements for use therein
IPC: E04B1/41
Filed: 1969-03-11
Abstract: 1309072 Wall ties ECONA (G & B) PLASTICS Ltd 9 June 1970 [11 March 1969] 12689/ 69 Heading E1B A cavity wall tying element consists of a strip of rigid material adapted to fit within the wall cavity and formed with two or more longitudinally-extending recesses each capable of receiving and locking one end of a tie bar. As shown, the polyethylene or p.v.c. element 14 is provided with dovetail-sectioned recesses 15; plastics or metal tie bars 16 lock into the recesses. Pipes 17-19 may pass up vertically through the hollow element.
Patent GB-1318868-A (GB)
Title: Propulsion nozzles for marine vessels
IPC: B63H5/14
Filed: 1969-06-25
Abstract: 1318868 Marine propulsion HYDROCONIC Ltd 25 June 1970 [25 June 1969] 32154/69 Heading B7V A ship's propulsion nozzle 11 is of the type which is in the form of an annular solid of revolution such as would be generated by revolution of a hydrofoil section about the axis of the screw or propeller shaft. The outer wall of the nozzle is a truncated cone converging from fore to aft and the inner wall has a cylindrical mid-portion forward of which the nozzle has a forwardly divergent mouth flaring out smoothly to the leading edge of the nozzle. Aft of the mid-portion the inner wall 16 diverges rearwardly to the nozzle trailing edge.
Patent GB-1321724-A (GB)
Title: 17-cyano-steroids and processes for their preparation
IPC: A61K31/57
Filed: 1971-04-19
Abstract: 1321724 17-Cyanosteroids ROUSSELUCLAF 19 April 1971 [4 March 1970] 36203/72 Divided out of 1321722 Heading C2U [Also in Division C3] The invention comprises 3-ketal-17α-hydroxy- 17#-cyano-estra-5(10),9(11)-dienes and their 17- trialkylsilyl ethers; and the preparation thereof from the corresponding 17-ones by reaction with an alkali metal cyanide in an acid medium followed, when required, by trialkylsilylation.
Patent GB-1327245-A (GB)
Title: Control mechanism for positioning arc furnace electrodes
IPC: F15B21/08
Filed: 1971-08-16
Abstract: 1327245 Arc furnace electrode control INDUCTOTHERM EUROPE Ltd 16 Aug 1971 [10 Sept 1970] 43320/70 Heading G3P In a system for controlling the position of an arc furnace electrode, electro-hydraulic twostage servo-valve 22 responds to signals representing electrode movement required and positions a double-acting piston 18 from which feedback is taken via potentiometer 24. Piston 18 is coupled at 20 to a reversing spool 12 controlling a main ram which supports the electrode. The potentiometer 24 serves to recentre spool 12 after each operation.
Patent GB-1327636-A (GB)
Title: Vehicle seat with spring supported scissors levers
IPC: B60N2/52
Filed: 1971-04-29
Abstract: 1327636 Resiliently mounted seats ISRINGHAUSEN Gebr 29 April 1971 12132/71 Addition to 1230734 Heading A4U In a vehicle seat frame having an upper member and a lower member, the lower member being in the form of rails and the frame being supported by scissor linkages f for vertical movement under the influence of springs 16a, a damper a is provided which is disposed in the frame at an oblique angle to the frame and is connected at its upper end to the upper seat frame member by a bracket b and is articulated at its lower end by a bush c and links d to a transverse tube e connecting the ends of the scissors levers f which reciprocate in the rails. The links d are welded to the tube e and are angularly displaced by rotation of the tube e during displacement along the rails, the stroke of the damper being increased during oscillating movements of the seat. The damper preferably includes a damping spring g and is positioned centrally of the seat. The springs 16a are positioned horizontally and are secured at one end to a two-armed lever (17a) which is connected centrally by a link (18a) to a bell crank lever (h) rotatable about a pivot l in the seat frame and movable by a pin-and-slot engagement with a nut m on a transverse spindle n, to adjust the tension of the springs 16a.
Patent GB-1336648-A (GB)
Title: Air filters
IPC: B01D46/04
Filed: 1972-06-30
Abstract: 1336648 Air filter PROVENAIR Ltd 30 June 1972 [30 March 1971] 8144/71 Heading B1T Inward-flow tubular filter elements are arranged in rows and columns depending from respective apertures 13 in a horizontal tube plate (11) separating lower inlet chamber (10) from upper outlet chamber (12), and chamber (12) accommodates a gantry 20 running on rails (21) lengthwise of the chamber, the gantry carrying a manifold (23) with downwardly extending reverse flow nozzles (25) arranged to deliver air into the elements in successive rows as the gantry moves. The reverse flow air causes momentary shaking of the elements and is delivered by a fan 30, located outside chamber (12), and connected to manifold (23) in Fig. 2 by pivotally connected ducts 33, 35 to accommodate the movement thereof. Fig. 4 (not shown) illustrates a flexible skirt enclosing the nozzles and extending down to plate (11). The filter elements comprise flexible sleeves closed at their lower ends, whose upper ends are folded over resilient rings (42) on the top of plate (11) and clamped thereto by upper flanges (41) on respective internal support frames. Each set of six adjacent flanges (41) is clamped to plate (11) by a separate clamping plate (45) (Fig. 3, not shown). In Figs. 5 to 7 (not shown) fan 30 is connected to the manifold by an axially extendable bellows, supported by side arms running on rails. The constructions enable large numbers of filter elements to be located in one housing, and several gantries could traverse different sections of the outlet chamber. The filter is suitable for filtering air used in separating asbestos ore. The housing has a lower shutter for removing solids.
Patent GB-1337553-A (GB)
Title: Apparatus for aligning and jointing together pipes or rods
IPC: B23K37/053
Filed: 1972-03-22
Abstract: 1337553 Welding by fusion; soldering PROEKTNO-KONSTRUKTORSKOE BJURO PO MEKHANIZATSII ENERGETICHESKOGO STROITELSTVA and VSESOJUZNY ZAOCHNY MASHINOSTROITELNY INSTITUT 22 March 1972 13278/72 Heading B3R [Also in Division E2] Pipe or rod (e.g. square or round section) endto-end aligning and jointing (soldering or welding) apparatus comprises a carriage 1 horizontally movable by a double-acting fluid (e.g. air) pressure cylinder 23, a vertical column 2 mounted on said carriage so as to be pivotally movable about a vertical axis 5, a cantilever yoke 8 mounted on said column so as to be pivotally movable about a horizontal axis 7, and a clamping and jointing mechanism 12 which is mounted in said yoke so as to be pivotally movable about an axis 11 at right angles to the axis 7, and which carries two coaxial pairs of pipe or rod grippers. Each gripper comprises a jaw 20 pivoted on one end of a spring-returned bell-crank lever 16 pivoted on the mechanism 12. When the carriage is moved towards the pipes or rods the free ends 18 of the lever 16 bear against the pipe or rod peripheries to effect inward gripping movement of the jaws 20. As shown, to permit rotation of the pipes or rods about their common axis when held in the jaws 20, the latter are provided with ball-bearings 22; and the mechanism 12 includes a power transformer 13 and an inductor 14.
Patent GB-1343077-A (GB)
Title: Halogenated polyoxadiazoles
IPC: C08G73/08
Filed: 1971-05-14
Abstract: 1343077 Halogenated poiyoxadiazoles IMPERIAL CHEMICAL INDUSTRIES Ltd 8 May 1972 [14 May 1971 19 Nov 1971] 14873/71 and 53814/71 Heading C3R The invention comprises halogenated polyarylene - 1,3,4 - oxadiazoles which have a greater resistance to burning than the unhalogenated polymers. They have repeating units of formula where R is an arylene radical, at least one hydrogen atom of radical R in at least some of the units being replaced by bromine or iodine, the halogen content of the polymer being at least 2% by weight. Either a previouslyformed polyarylene oxadiazole may be halogenated or an aromatic dicarboxylic acid may be halogenated and then reacted with a hydrazine salt to form the halogenated polyarylene oxadiazole. Examples are given. Uses.-Fibres and films.