baber/WOPTO huggingface dataset:
Patent GB-713661-A (GB)
Title: Improvements in and relating to pressure gauges for tyres and the like
IPC: G01L17/00
Filed: 1951-08-01
Abstract: 713,661. Pressure gauges. TURNER, W. July 31, 1952 [Aug. 1, 1951], No. 18242/51. Class 106 (2) A liquid-filled type pressure gauge comprises a body 11 with a valve depressor-head 12 of known form. Within the body 11 a piston 16 is provided with a cup leather washer 17 and is spring loaded by a coil spring 19 anchored by screw threads on the boss 20 and the piston 16. A separate pressure indicator portion 18 is provided with a second cup leather washer 24 held by a screw 25 and a spring friction device in the form of a split resilient ring 31 in an annular groove 30, to retain the portion 18 in extended pressure indicating position. A knob 26 is provided for manipulating !he portion 18. Apertures 28 are also provided to prevent formation of a vacuum behind the cup leather washer 24.
Patent GB-565474-A (GB)
Title: A process of synthesising aldehydes and lactones
IPC: C07C45/75
Filed: 1942-12-23
Abstract: A halogenated aliphatic hydrocarbon is used as solvent for the recovery of the product in (a) the condensation of formaldehyde with isobutyraldehyde to give a  : a  - dimethyl - b  - hydroxypropionaldehyde, (b) the formation of a -hydroxy-b  : b -dimethyl-g -butyrolactone from a  : a -dimethyl - b  - hydroxypropionaldehyde by converting the latter first into its bisulphite compound and then into the cyanhydrin, followed by hydrolysis and formation of the lactone by heating the resulting acid with water, (c) the extraction of the l-lactone in the resolution of the racemic mixture of a -hydroxy-b  : b -dimethyl - g  - butyrolactones.  In examples, ethylenedichloride, methylenechloride and chloroform are used as solvents in the above processes; propylenedichloride and trichlorethylene are also mentioned.
Patent GB-702255-A (GB)
Title: Improvements in mixed grain photographic emulsions and sensitive materials employingthem
IPC: G03C1/12
Filed: 1949-10-29
Abstract: 702,255. Mixed grain colour photographic emulsions. KODAK, Ltd. Oct. 29, 1949 [Oct. 30, 1948], No. 18311/52. Divided out of 702,200. Class 98(2) Two sets of silver halide grains of substantially the same inherent speed to white light are respectively sensitized to different regions, as in the red and green, of the spectrum by dyes each having two different spectral absorptions and being capable of conferring two different sensitizing maxima on silver halide grains when used in a high and a low concentration, the dyes being used in high concentrations whereby diffusion of each dye from the grains intended to be sensitized to grains not intended to be sensitized thereby sensitizes the latter at the other sensitizing maximum. A gelatin layer containing such sensitized grains may be overcoated with a layer containing high contrast blue sensitive silver halide grains and a removable yellow dye, or the emulsion itself may contain a set of such blue sensitive grains with omission of the yellow filter dye. In four examples the emulsions are the same as those described in the original Specification 702,200. Other suitable sensitizing dyes are described with reference to Specifications 378,870, [Group IV], 378,885; 380,140, 408,277, [both in Group IV], 496,116, 540,444 and 592,267.
Patent GB-1073206-A (GB)
Title: Improvements in or relating to amplifier circuit arrangements
Inventor: HENTLEY EDWARD LEONARD
IPC: H03F3/32
Filed: 1966-04-27
Abstract: 1,073,206. Valve amplifying circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. April 27, 1966 [April 30, 1965], No. 18429/66. Heading H3W. A valve-output stage of the single-ended push-pull type is reflexed to act also as an I.F. amplifier. Valves 1, 7 are series-connected via resistor 6, valve 7 being driven from the voltage developed across this resistor by returning its grid to the anode of valve 1; the output is taken from the cathode of valve 7 or a tapping on resistor 6, via D.C. blocking capacitor 8. In addition to the audio signal applied to valve 1 via capacitor 2, an I.F. signal is applied via tuned transformer 10 and capacitor 12. The valve 7 is driven from the I.F. signal developed across resistor 6, its cathode being earthed at these frequencies by means of capacitor 13: an I.F. output is taken from the anode by means of tuned transformer 14. In a modification (Fig. 2, not shown) the valves are in cascade connection for I.F. signals, the grid of the second valve (19) being earthed at I.F. by a capacitor (22) and obtaining bias from resistor (6) by means of a grid leak (21); to enable the cathode to be driven an I.F. choke (24) is interposed in the output lead to the loud-speaker.
Patent GB-721494-A (GB)
Title: Electric incandescent lamp for short burning times
IPC: H01K1/14
Filed: 1952-07-22
Abstract: 721,494. Electric incandescent lamps. FISCHER, G. July 22, 1952 [July 27, 1951; Dec. 27, 1951]. No. 18499/52. Class 39 (2). An electric lamp of high illuminating intensity and intended primarily for short periods of use in making photographic exposures, has a filament of a rating that is so high, and a bulb of normal glass of such small volume, that the continuous energization of the filament results in the glass becoming softened in less than a quarter of an hour. One or more auxiliary filaments may be provided for use during the arrangement of the subject. In an example a 2000 watt lamp has a spherical bulb of 80 mm. diameter. The filament may be in the form of a plurality of parallel helices 2 connected between a pair of upper and lower electrodes 4 mounted transversely to the axis of the lamp. The cap is provided with three contacts when part of the filament is employed in known manner as an auxiliary filament for the purpose of avoiding dazzle.
Patent GB-785562-A (GB)
Title: Improvements in or relating to disposable surgical bags
IPC: A61F5/443
Filed: 1955-06-28
Abstract: 785,562. Discharge-collecting appliances. SORENSEN, E. June 28, 1955 [June 30, 1954], No. 18709/55. Class 81 (2). A disposable surgical bag for receiving matter discharged from an opening is retained on the wearer by an adhesive layer and consists of a flat container which is made of waterproof sheet material, is closed along all its edges and has a hole passing through the sheet material and the layer. A flat colostomy bag of rubber, guttapercha or plastic foil is provided with an opening 3 surrounded by an adhesive layer 4 by which the bag is secured to the body. A reinforcing ring may be interposed between the material of the bag and the adhesive layer 4. The adhesive disc punched out to form the opening 3 may be retained attached to one side of the opening 3 and used for repairing purposes if the bag is punctured.
Patent GB-1140620-A (GB)
Title: Improvements in or relating to multistable circuit arrangements responsive to clock pulses (jk flip-flops)
IPC: H03K3/038
Filed: 1967-04-24
Abstract: 1,140,620. Bistable J.K. circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 24 April, 1967 [27 April, 1966], No. 18774/67. Heading H3T. A synchronous bi-stable circuit, i.e. a bistable circuit which in response to a clock pulse sets to a state corresponding to which one of J and K inputs receives a "1" and reverses its state when both are "1", comprises four pairs of NAND gates interconnected substantially as shown in Fig. 1 or 2. 2, Fig. 1 setting to the J state is effected by the concurrent presence of a "1" at the J input and a clock pulse at Cp. The onset of the clock pulse opens gate N1 and thus sets an intermediate bi-stable pair N3, N4 to the corresponding state and the termination transfers the state to bi-stable pair N7, N8. Feedback from the outputs to the inputs so sets the input gates that when signals occur concurrently at J and K only that one which causes a changeover of state is effective. In Fig. 2, one of the latter feedbacks is derived instead from the opposite first gate.
Patent GB-627664-A (GB)
Title: Improvements in conveyor, power transmission and like belting
IPC: B65G15/36
Filed: 1947-07-15
Abstract: 627,664. Belting fabric. TURNER BROS. ASBESTOS CO., Ltd., and HANNAN, C. W. July 15, 1947, No. 18776. Drawings to Specification. [Class 142 (iv)] A belting fabric has at least twice as many warp ends as weft threads per inch, and the weft is crimped more than the warp so that the extensibility of the fabric is greater weftway than warpway. Examples are given of fabrics woven plain, except that two, three or four warp ends work as one.
Patent GB-945281-A (GB)
Title: Plunger-operated ballpoint pen
IPC: B43K24/08
Filed: 1962-05-16
Abstract: 945,281. Retractable ball pens. C. J. LAMY. May 16, 1962 [May 16, 1961; Feb. 24, 1962], No. 18842/62. Heading B6P. A retractable ball pen has actuating cams 15 operated by depression of a plunger 3 and which are guided in members 4, 5 slidably but non-rotatably mounted in the barrel 1 so as to allow of longitudinal movement of and cause rotation about the pen axis of the cams 15 without any locking action, the cams being associated with the pen 16 so that similar movement of the pen occurs, and at least one projection 22 on the pen first moves downwardly along a groove 21 in a collar 20 at the writing end of the pen and then moves circumferentially to engage-the lower edge of the collar or depressions in that edge to hold the pen in projected position. Near its point the pen is engaged by a strong retracting spring 16a, and fitted over its inner end is a member 14, Fig. 6, carrying the cams 15 and having recesses 19 engaging dogs on the pen to prevent relative rotation between the pen and the member 14. Depression of the plunger 3 moves the member 14, cams 15 and pen 16 downwardly. The upper guide member 4 is pressed downwardly by a spring 10 and its rotation is prevented by a rib-and-groove arrangement 6, 8 which also limits the down ward movement. Rotation of the lower guide member 5 is similarly prevented, and a spring 11  moves the member 5 into contact with the member 4. Guide grooves 12 for the cams 15 are provided in the member 4, and when the pen is retracted the cams 15 abut against the upper ends of the grooves. Cam members 13 are provided on the member 5 in alignment with the grooves 12. The number of grooves 21 in the collar 20 is half the number of the grooves 12, and each groove 21 aligns longitudinally with one of the grooves 12. During depression of the plunger 3, the cams 15 with the pen move downwardly until the cams engage the upper surface of the part 5 and the projection 22 is clear of the collar 20. During further downward movement, the cams 15 depress the part 5 until they are clear of the part 4. Thereupon the cams 15 by engagement with the cams 13 are moved circumferentially of the barrel 1 thus allowing the member 5 to move upwardly into contact with the member 4 and causing the projection 22 to be moved out of alignment with a groove 1, so that when the plunger 3 is released, the projection 22 engages the lower edge of the collar 20 and the cams 15 move partly into the slots 12. Subsequent depression of the plunger causes another stepped rotation of the parts 14, 16 so that the projection 22 is moved into alignment with a groove 21 and the spring 16a moves the pen to retracted position. The fixed collar 20 may be replaced by a circumferentially-movable one, with grooves 21 bevelled at their lower ends. The action of a projection 22 on the bevelled grooves causes the collar to be aligned for correct operation of the pen.
Patent GB-675250-A (GB)
Title: Improvements in devices for clearing pipes, drains, sewers or the like
IPC: E03F9/00
Filed: 1950-07-28
Abstract: 675,250. Clearing pipes, drains &c. ELLIOT, J. Jan. 3, 1951 [July 28, 1950], No. 18851/50. Class 99 (ii) A propeller-shaped member C is integral with or secured to a socket B having an inside or outside thread D to receive a wooden, cane or metal tube serving as a handle, a hole E being provided in the socket to house a screw, prong or similar device F and to allow the passage of water, steam, air &c. to spray an obstruction.
Patent GB-639940-A (GB)
Title: Improvements in or relating to the production of guanidine nitrate
Filed: 1947-07-15
Abstract: Guanidine nitrate is obtained by dissolving ammonium thiocyanate and at least one equimolar weight of ammonium nitrate in ammonia, heating the so-formed solution in an enclosed vessel to a temperature between 170 DEG  and 210 DEG  C. and recovering guanidine nitrate from the reaction product.  The preferred temperature range is 175 DEG  to 185 DEG  C. and the pressure is preferably between 200 and 300 pounds per square inch.  the yield is improved by eliminating hydrogen sulphide at intervals from the reaction mass. This may be effected by interrupting the heating at intervals, venting the reaction vessel and sweeping anhydrous ammonia through the reaction melt to carry out the hydrogen sulphide while at the same time maintaining a protective blanket of ammonia in the reaction vessel to prevent risk of explosion.  The ammonia and hydrogen sulphide are separated and the ammonia recycled to the reaction zone.  Another method to eliminate the hydrogen sulphide is to use an excess of ammonium nitrate whereby the hydrogen sulphide is oxidized to elemental sulphur which is insoluble in the reaction melt.  The process may be carried out batchwise or continuously.  In the continuous process ammonium thiocyanate and ammonium nitrate are dissolved in anhydrous ammonia and the solution pumped under pressure through a pipe still or heated coil, the mixture being continuously discharged into a flash chamber under a lower pressure than that in the pipe still. Gaseous ammonia and hydrogen sulphide are allowed to escape from the flash chamber and further quantities of ammonia are injected through the reaction mass in the flash chamber until the effluent gases are substantially free of hydrogen sulphide.  Unreacted salts and ammonia are then recycled to the pipe still in admixture with fresh reactants. Guanidine nitrate is withdrawn from the chamber at an average rate equivalent to the rate of its continuous production.  In both batch and continuous processes the charge can batch and continuous processes the charge can be poured out into a mixture of ice and water to crystallize the guanidine nitrate, and after filtration to remove the crystals, residual ammonium thiocyanate and ammonium nitrate are returned to the process.  In examples, ammonium nitrate and ammonium thiocyanate are placed in a vessel cooled below room temperature and gaseous ammonia passed through the mixture to form a solution of the salts in liquid ammonia.  This mixture is then heated in an autoclave, to the appropriate temperature, to form guanidine nitrate.  In one of the examples, two moles. of ammonium nitrate are used per mole. of the thiocyanate and a comparative example is also given to show that no guanidine nitrate is obtained when the reaction temperature is 120 DEG  C.  The Specification as open to inspection under Sect. 91 refers to the use of any temperature above 120 DEG  C. This subject-matter does not appear in the Specification as accepted.
Patent GB-488968-A (GB)
Title: Improvements in or relating to the manufacture of shuttlecocks
IPC: A63B67/18
Filed: 1937-07-07
Abstract: 488,968. Shuttlecocks. LETHABY, H., and GOODWOOD SPORTS, Ltd. July 7, 1937, No. 18902. [Class 132 (iii)] A shuttlecock has the component parts assembled together and the almost finished article is allowed to season, when a screw of appropriate weight is screwed into the base of the shuttlecock from the flat or inner end thereof. Pieces of kid b, c are stretched over and secured by adhesive to the usual base a and a piece of ribbon d secured by adhesive covers the butt joint between the pieces of kid b, c. Feathers e are inserted and stitched with twine f, g in the usual manner. The shuttlecock is then seasoned and a screw h is inserted and covered by a disc of linen or the like, secured to the base by adhesive, the weight of the screw h and the disc and an allowance for the adhesive used being such as to bring up the weight of the shuttlecock to the required standard. More than one screw may be used.
Patent GB-852956-A (GB)
Title: Catalysts for the production of linear high-molecular-weight polymers of alpha-olefins and process for the polymerisation of alpha-olefins with these catalysts
IPC: C08F10/00
Filed: 1957-06-17
Abstract: High linear polymers of a -olefins such as ethylene or propylene are formed by the action of a catalyst comprising (i) an alkyl compound of a Group II metal, e.g. Al2(C2H5)3 and (ii) a compound of a Group IVa, Va or VIa metal having at least one organic group bonded to the metal by an oxygen atom said compound being absorbed on a solid carrier, e.g. alkoxides, haloalkoxides or acetylacetonates on silica and/or alumina (see Group IV(a)).  Polymerisation is carried out in the presence of hydrocarbon solvents, e.g. heptane or benzene.  The polymers contain only small amounts of inorganic matter, and are free from chlorinated products.  In an example, a silica-alumina carrier is treated with a solution of titanium tetraisopropylate in pentane and heated to 55 DEG C. for 30 mins., after which the solvent and isopropanol formed are removed; a solution of triethyl aluminium in heptane and a propylene-propane mixture are added.  Polymerization is effected at 90 DEG C. for 10 hours with stirring.  The whole is shaken with acidified water, the heptane phase containing the polymer is separated and the polymer coagulated by adding methanol and acetone.  The polymer is purified by dissolution in tetrahydronaphthalene and successive extraction hot acetone, ether and heptane, yielding respectively oily and semi-solid products of low molecular weight, solid amorphous polypropylene of mol wt. 57,600, solid partially crystalline polypropylene of mol wt. 226,000, the residue being crystalline polypropylene of mol wt. 400,000. Specifications 810,023 and 828,971 are referred toALSO:A catalyst for the polymerization of a  olefins, such as ethylene or propylene comprises (i) a metal alkyl compound of Group II or III of the Periodic Classification Table according to Mendeleeff and (ii) a solid carrier, for example, silica and/or alumina with an absorbed compound of a metal of Group IVa, Va, or VIa with at least one organic group bonded to the metal by an oxygen atom.  The Group IVa, Va or VIa organo-oxy-metal compound, for example titanium or vanadium alkoxide, halo-alkoxide, or acetyl-acetonate in a hydrocarbon solvent under moisture-free and oxygen-free conditions may be absorbed on the surface of the solid carrier between 20 DEG -100 DEG C. in a weight ratio of 1:1 to 1:100 and the metal alkyl can be added to the treated carrier in the polymerization vessel followed by the olefin to be polymerized. Examples given include (a) titanium tetra isopropylate, titanium mono chloro-tributylate, vanadyl isopropylate or vanadium acetyl-acetonate in pentane absorbed on silica/alumina carriers with triethyl aluminium in n-heptane or benzene to polymerize ethylene or propylene in propane.  Specifications 810,023 and 828,791 are referred to.
Patent GB-928813-A (GB)
Title: Pavement breaking drill
IPC: E21C37/24
Filed: 1960-05-30
Abstract: 928,813. Percussive tools. A. R. HENRY. May 30, 1960 [July 6, 1959], No. 19055/60. Class 124. A percussive tool comprises a housing, a tubular barrel, a striker slidable in the barrel, a drive member comprising a crank having a crank-pin rotatable at right-angles to the centre line of the barrel, and a pair of opposed toggles each comprising an upper and a lower link joined at their contiguous ends, the opposite ends of the lower links being pivoted to the striker, the opposite ends of the upper links being connected by means pivotally connected to the crank-pin and a compression spring arranged between the upper links. As shown, a housing 2 has a barrel 20 extending therefrom and having a striker 30 sliding therein. The striker is pivoted to the ends of the lower links 102 which are pivoted at 104 to the free ends of a pair of upper links 96, the other ends of which are pivotally connected to a pin 78 of a crank 70. A spring 112 is connected between the links 96. In operation the inertia of the striker moves the links 102 out of the neutral position shown and causes the spring 112 to be compressed, and on the downward movement of the striker the force of the spring is added to the blow.
Patent GB-354012-A (GB)
Title: Improved sign letters or characters
IPC: G09F13/04
Filed: 1930-06-23
Abstract: 354,012. Signs. PRESTON, C. H. F., 10, Titchfield Terrace, Albert Road, St. John's Wood, London. June 23, 1930, No. 19062. [Class 3 (ii).] A sign character is formed as a hollow block of translucent material, and is illuminated from within by means of lamps mounted on a flat back adapted to fit within the back of the block character so that the whole of the sides is illuminated. Fig. 2 shows a block letter comprising translucent front and side panels 20, 22, bound at the edges by metal or other suitable strips 29, to which they are connected by cementing or by rivets or screws 31 which pass through the panels into similar strips inside. The panels 20, 22 are of glass or other suitable material and are preferably coloured and frosted by sand blasting or chemical means ; they may further be formed with a stippled or prismatic surface, or may alternatively be lined with sheets of material having any of these features. Instead of being formed from separate panels, the characters may be moulded, pressed or blown from a single piece of glass, and formed with plane or curved faces. Fig. 7 shows the detachable back carrying an angular reflector 26 and the illuminating means, which in this case comprises a tubular filament lamp 25 carried by spring contact clips 28 and arranged along each limb of the character ; alternatively, ordinary filament lamps or discharge lamps may. be employed. Attachment to the character is effected by means of a knurled screw which passes through the top panel into the tapped lug 23, and also by means of spring-pressed ball catches 15.
Patent GB-596469-A (GB)
Title: Improvements in ovens for baking enamelled wires
IPC: C23D9/00
Filed: 1945-07-26
Abstract: 596,469. Drying materials in long lengths. BRITISH INSULATED-CALLENDER'S CABLES, Ltd., and RICHARDSON, A. B. F. G. July 26, 1945, No. 19190. [Class 34 (i)] [Also in Group VIII] In an apparatus for drying the coatings of wires, the wire is taken through a coating-bath, e.g,. an enamelling-bath, and from thence vertically upwards through a jacketed heating tube, then passes through the subsequent baths and heating-tubes being repeated until the required thickness of coating is built up. As shown, the wire 11 is taken from a bobbin and led under a pulley 13, Fig. 5, in the bath 22 to pass upwardly through the tube 3, the upper part of which is shown in Fig. 4. The wire is trained over a pulley 12 and downwardly for another coating and drying and so on. The wire is finally wound on a bobbin which, together with the top pulleys 12, is power driven. The tubes 3 are surrounded by jackets 4 which are supplied with heating- fluid from a header 40 and pipes 44, the return of the fluid to the heater being by way of pipes 45 and a header 41. The pipes 44, 45 and the headers are sloped to avoid pockets of condensed vapour. The heater described is a boiler heated by an immersion heater and containing a fluid which gives a high temperature with low absolute pressure, e.g., a mixture of diphenyl and diphenyl oxide. The wire may be cooled as it leaves the tubes, by a suction tube 51 with a slot 52 adjacent to the wire 11 and increased cooling may be provided by a blower tube 57 with a slot 58. Two or more sets of aligned tubes 3, may be provided with the two or more sets of jackets connected to boilers giving different temperatures, or two or more sets of jackets may be arranged on a single set of tubes of greater length. The tubes 3 are provided with projections which space them correctly from the jacket tubes 4, and the latter are carried in brackets 8 with screws 10 for adjusting the tubes accurately relatively to the path of the wire.