baber/WOPTO huggingface dataset:
Patent GB-1201909-A (GB)
Title: Production of polyesters
Inventor: JENKINS VICTOR FREDERICK
IPC: C08G63/82
Filed: 1967-05-17
Abstract: 1,201,909. Polymerized lactones and polyurethanes obtained therefrom. LAPORTE CHEMICALS Ltd. 16 Aug., 1968 [17 May, 1967; 17 May, 1968], Nos. 22815/67 and 23516/68. Headings C3P and C3R. Polyesters, preferably of molecular weight 1,500 to 20,000. are made by polymerizing certain lactones in the presence of an initiator and a catalyst comprising an organic carboxylic or sulphonic acid having a pK a  value of less than 2À0 at 25‹ C., e.g. monochloroacetic, dichloroacetic, trichloroacetic, bromoacetic or trifluoracetic acids or benzene aulphonic, toluene sulphonic or ethane sulphonic acids The lactones are of formula where n is 4 to 7 and R is a methyl, ethyl, npropyl or isopropyl group or a hydrogen, chlorine or bromine atom provided that the (CR 2 ) n  group contains not more than 12 carbon atoms and not more than 2 halogen atoms. The initiators are monomeric or polymeric compounds containing one or more hydroxyl and/or amino groups. At the end of the reaction the catalyst may be removed from the polyester, e.g. by sparging the latter with nitrogen or by heating it to 120‹ C. under vacuum. Examples describe the polymerization of epsilon-caprolactone or a mixture thereof with methyl episilon-caprolactones. Polynrethanes are made by reacting the linear or branched polyesters with an excess of a polyisocyanate and reacting the resulting polymer with or carrying out the urethane-forming reaction in the presence of water or a polyfunctional alcohol or amine. In Examples 13, 16, 17, 18, 22 and 25, polyurethane rubbers were made by reacting a polyester with tolylene diisocyanate and reacting the product with di-(4- amino-3-chlorophenyl) methane. In Example 19 a polyurethane rubber was made by reacting a polyester with naphthalene-1: 5-diisocyanate and reacting the product with 1: 4-butanediol. In Example 21, a polyurethane rubber was made by reacting a polyester with di-(4-isocyanato-phenyl) methane and butane-1: 4-diol. In Example 26 a polyurethane film was made by reacting a polyester with di-(4-isocyanatophenyl) methane, dissolving the prepolymer in dimethyl formamide, adding ethylene diamine and a little phosphoric acid and thereafter casting. An unsaturated polyester was made in Example 20 by polymerizing epsilon-caprolactone in the presence of a polyester of ethylene glycol and maleic anhydride-the product was dissolved in styrene and the whole copolymerized using M.E.K. peroxide and cobalt naphthenate as catalyst. Reference has been directed by the Comptroller to Specifications 859,642 and 859,645.
Patent GB-967590-A (GB)
Title: Improvements in and relating to electrical communication lines
Inventor: MARKL GEORG
IPC: H04B17/40
Filed: 1963-06-13
Abstract: 967,590. Unattended repeaters. FELTEN & GUILLEUAME FERNMELDEANLAGEN G.m.b.H. June 13, 1963, No. 23661/63. Heading H4R. In a transmission system, particularly a carrier system, having separate channels for the two directions, to check the condition of the repeaters, pulses of a frequency outside the transmission range are sent along the " go " channel and are transferred to the " return " channel through filters 3 at the repeaters. Each pulse from the generator 2 should therefore give rise to a succession of return pulses in the receiver 4, which may be an oscilloscope. The pulse frequency should be such that there is no overlap between the return pulses resulting from successive transmitted pulses, and the time-base frequency of the oscilloscope is preferably the same.
Patent GB-1199872-A (GB)
Title: Improvements in or relating to Recording Apparatus
IPC: G06K1/12
Filed: 1968-05-17
Abstract: 1,199,872. Magnetic recording. DIGITRONICS CORP. 17 May, 1968, No. 23689/68. Heading G4C. A laminar record member and a selectively positionable element, both bearing magnetic shunting means, are used in conjunction with a movable source of magnetic field, to record data on a magnetizable medium. A magnetic tape 10, on reels 12, 14, is moved to an unused portion using handle 22. A credit card, bearing fixed (e.g. name) data by the presence and absence of areas of magneticallysoft material in the non-magnetic card (or by holes in a magnetic card) is placed over (or under) the tape 10 at 28. Slides 64, 62 are moved to position selected groups of similar magnetic areas over (or under) tape 10 to represent variable data. A handle 76 is used to move a magnet (in a carriage 72) along tape 10 thus changing the magnetization of the tape except where the magnetic areas on the card or the slides 64, 62 are present to act as magnetic shunts. When the tape 10 is full, the reel 14 can be removed and fed to a computer, or the tape can be played back in situ using motor M to drive the tape in reverse past a reading head. A visual recording of the fixed and variable data may be made on pressure-sensitive paper during the magnetic recording, using embossing symbols on the card and slides 64, 62, and a roller on the carriage 72.
Patent GB-861601-A (GB)
Title: Control mechanism for aircraft power plants comprising a gas turbine engine driving a propeller
Inventor: SKELLERN JOHN
IPC: F02C9/30
Filed: 1957-07-26
Abstract: 861,601. Fluid-pressure servomotor-control systems. NAPIER & SON Ltd., D. July 25, 1958 [July 26, 1957], No. 23706/57. Class 135. [Also in Group XXVI] A control system for aircraft power plant comprising a gas turbine coupled to a propeller or helicopter rotor includes a swashplate fuel pump 13, the output of which is controlled in accordance with engine speed, and is passed through a metering valve 43 controlled by a servo mechanism 56, 57, also in accordance with engine speed, whereby the valve has a unique setting for each engine speed. Fuel pump 13 is of the type in which inclination of the swashplate is adjusted by a piston 18 working in a cylinder whose ends are interconnected through an orifice 23 and controlled by a leak-off valve 34 operated by a diaphragm 30 subjected through a port 25 in the pump casing 15 to a pressure proportional to engine speed, the diaphragm also being subjected to the loading of a spring 36, which can be varied by a pilotoperated lever 38 to vary the datum engine speed setting. The longitudinal position of sleeve 43, which is formed with a tapered port 44 furnishing the variable area fuel metering orifice, is adjusted by a power piston 57 controlled by a pilot valve 56 connected to an operating diaphragm 52 subjected to the pressures on the two sides of diaphragm 30. Piston 57 acts upon a valve loading spring 55, and is connected to sleeve 43 by a link 62. The latter is also connected by a link 82 to a lever 81 controlling a fuel dump valve 79, controlling the connection of the fuel supply line to a dump line 76 or the burner line 80. By operating lever 81 the pilot may open the fuel metering orifice to exceed its minimum setting, for engine starting. The pressure drop across metering valve 43 is communicated through pipes 70, 71 to the opposite sides of a diaphragm 73 controlling a bleed valve 75 connected to chamber 20 of the pump governor, to limit the pump output if the pressure drop exceeds a predetermined value;
Patent GB-360486-A (GB)
Title: Improvements relating to advertising and like signs
IPC: G09F13/04
Filed: 1930-08-08
Abstract: 360,486. Signs. NEWMAN, J. W., 1, Harcourt Buildings, Temple, London. Aug. 8, 1930, No. 23802. [Class 3 (ii).] In a sign of the kind wherein strips of glass &c. are secured in slits in a baseplate to form letters or designs which are illuminated from the rear, the strips are provided with edges which overlap stencil interruptions between groups of slits constituting an individual character or design, so that the latter is substantially continuous and free from a stencil-like broken effect. As shown, applied to the formation of the letter " O," the strips of glass 4 have their rear edges cut away at 6 so as to overlap the stencilinterruptions 3, 3, when placed in the slits 2, 2. Specification 349,617 is referred to. The Provisional Specification describes an arrangement in which the bases of the strips have a flange which can be integrally moulded or built up of lengths of glass cemented to the strips, and/or secured by clips, to form ends of T-section. In this case the strips are inserted through the slits from the rear of the baseplate and then secured by a binding or cementing medium.
Patent GB-1507513-A (GB)
Title: Phosphine-developing pesticide and process for production thereof
IPC: A01N59/26
Filed: 1975-06-02
Abstract: 1507513 Phosphine - developing pesticide DEUTSCHE GES FUR SCHADLINGSBEKAMPFUNG m,bH 2 June 1975 [11 Sept 1974] 23809/75 Heading A5E A phosphine - developing pesticide comprises magnesium phosphide and/or aluminium phosphide, a thermally decomposable material and polyethylene oxide having preferably a molecular weight of 4000-12000, It is preferred that the metal phosphide is present in the form of individual particles with a dense coating of the polyethylene oxide which delays atmospheric humidity from gaining access to the metal phosphide. The composition is preferably prepared in the form of tablets or pellets, a suitable decomposable material is ammonium carbonate and the conversion of the phosphide to phosphine may be enhanced by the addition of sodium oxide, sodium hydroxide or potassium hydroxide.
Patent GB-812105-A (GB)
Title: Improvements in or relating to conveyor belt systems
IPC: B07C3/06
Filed: 1957-07-26
Abstract: 812,105. Endless belt conveyers. SIEMENS & HALSKE A.G. July 26, 1957 [July 26, 1956], No. 23822/57. Class 78 (1). In a conveyer system for letters or other flat articles the letters 1 are conveyed on V-shaped belts 2 in the on-edge position past a number of diverting means each of which comprises a fixed driven roller 5 and a movable roller in the form of two roller bearings 15 mounted on the free end of a pivoted bracket 14 which is movable by an electromagnet 12 to cause the roller bearings 15 to move towards the roller 5 so that a passing letter is gripped between the fixed and movable rollers and is removed upwardly from the conveyer. The axis of the roller bearings 15 is arranged above that of the roller 5 so that the letter is diverted in an inclined position to fall on a flat conveyer belt 6 passed around the roller 5 for further conveyance. Alternatively, Fig. 5, the diverted letter may engage a sheet metal guide 18 which guides it into a shoot 20 leading to a receiving bin or further conveyer. The electromagnet may be manually controlled or, as shown, is controlled by a switch 16 having an operating arm which co-operates with a marking on a letter to be diverted, the letters having different markings, each of which is adapted to actuate the switch 16 of a particular diverting means. The roller 5 is driven by a flexible shaft 7 from a roller 8 with which the belt 2 is pressed in contact by a pressure roller 9. Guide tubes 3 and 4 are provided to maintain the letters on the belt 2 in upright position, the tube 4 being discontinued at each diverting means to accommodate the roller 5 which is journalled in the adjacent ends of this tube.
Patent GB-761718-A (GB)
Title: Improvements in the production of the solvent-stable alpha-modification of copper phthalocyanine
IPC: C09B67/00
Filed: 1954-08-18
Abstract: A solvent stable a-modification of copper phthalocyanine is obtained by dissolving in concentrated sulphuric acid unsubstituted copper phthalocyanine and an amount of a copper phthalocyanine substituted in the 4- position by chlorine atoms, nitro groups, or amino groups, the amount of the substituted product being such that the mixture contains 0.7 to 6 per cent by weight chlorine, 1 to 7 per cent by weight nitro groups, and 0.3 to 3 per cent by weight amino groups, pouring the solution into hot water, and recovering the precipitates. Examples describe the treatment as above of mixtures of copper phthalocyanine with a smaller quantity of its mono-, di-, tri-, and tetra-chlor derivatives, either prepared separately or prepared in admixture from phthalic anhydride and its 4-chlor derivative, urea, cuprous chloride, and molybdic acid, in trichlorbenzene or from phthalonitrile, its 4-chlor derivative, and cuprous chloride in nitrobenzene and pyridene.  Reference is also made to preparation of the nitro and amino mixtures from mixtures of phthalic anhydride with 4 - nitro - and 4 - amino - phthalic acid.
Patent GB-1151726-A (GB)
Title: Improvements in or relating to colour television systems.
IPC: H04N9/455
Filed: 1966-05-31
Abstract: 1,151,726. Colour television. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 31 May, 1966 [12 June, 1965], No. 24061/66. Heading H4F. The invention relates to a colour television system in which there are transmitted colour synchronizing "bursts" of colour carrier oscillation during the horizontal back porch intervals, the "bursts" including a component the phase of which is reversed in alternate lines. To prevent the "bursts" from interfering with vertical scan synchronization they are blanked for an interval including the vertical synchronizing signal and the immediately preceding and following equalizing pulses. Where scanning proceeds on the conventional interlaced basis with an odd number of lines forming a picture made up of two frames, there results an operation such that, in a sequence of four frames, the last "burst" before the blanked interval is of one phase in two of the frames and of the opposite phase in the other two frames. The first "burst" after the blanked interval exhibits a similar phase variation. The effect of the interruption of the "bursts" on the colour synchronization at a receiver is not by itself serious and results in only a small saturation error. The phase variation in the "bursts" however causes the error to vary and results in undesirable lowfrequency flicker (e.g. of 12À5 c/s.) in the first (the upper) part of the reproduced picture following the blanked interval. In accordance with the invention this defect is eliminated by causing the last "burst" before the blanked interval and/or the first "burst" after the interval to have the same phase in all frames. In one way of achieving this Fig. 1 and 3, the blanking signal is arranged to be advanced in time in the sequence of four frames by one half of a line duration for three successive frames and then to be retarded by one and a half lines for the fourth frame. The "burst" signals F both immediately preceding and following the blanked interval then have the same phase in all frames. In another way of carrying out the invention (not illustrated) the phase alternation of a few "bursts" before and/or after the blanked interval is terminated.
Patent GB-482821-A (GB)
Title: Improvements in and relating to pianoforte cases
IPC: G10C3/02
Filed: 1936-09-02
Abstract: 482,821. Pianofortes; desks. WATTS, W.S. Sept. 2, 1936, Neo. 24076. Divided out of 481,280. [Class 88 (ii)] [Also in Group XIV] The keyboard cover of a pianoforte has a hinge axis at its forward edge shiftable to a rear position in which the cover is substantially vertical and may be used as a music rest, from which position the cover may be turned down to a horizontal position suitable for writing. In Fig. 1, the hinge is formed by trunnion pins 28 slidable in guide tracks 28<1>. When turned down from the open position shown to the writing position, the cover 27 is supported on the side rests 30. In Fig. 2, the cover 27 is carried at each end on parallel links 34, 38, the link 34 being pivoted to the case at 35, and the link 38 being pivoted to a link 40 pivoted to the case at 41. In the-open position shown in dotted lines, in moving to which from the closed position a roller 43 runs against the case, the link 34 is supported by a stop 42 and is also engaged by the link 40. Drawers for accommodating music and other papers may be provided. Specification 454,056 is referred to.
Patent GB-899648-A (GB)
Title: Improvements in or relating to ornamental stitch sewing machines
IPC: D05B19/00
Filed: 1959-07-14
Abstract: 899,648. Sewing machines. FORSTER, E., and FORSTER, J., [trading as FORSTER GEB.]. July 14, 1959 [July 15, 1958], No. 24095/59. Class 112 [Also in Group XXIV] A sewing machine including a plurality of cams, a plurality of followers displaceable in fixed guides, and disposed between the cams and a rocker connected to means for effecting the formation of an ornamental seam, has a manually operable pattern selector effecting connection of a selected cam follower or followers with the rocker. Each follower 106 is slidable in a fixed housing 107 and is disposed opposite a corresponding one of a bank of cams 105 and between the cams and a rocker 103 connected at 104 to the devices (not shown) effecting the shape and appearance of the ornamental seam. The selector comprises a key-like blade 122 insertable in a bush 120 mounted within the rocker. Perforations 124 in the blade allow the passage of those followers which are to remain ineffective, the blade presenting a contact surface in the region of the follower or followers selected to be operative. A spring 111 presses the rocker, and thus the contact surface, against the chosen follower, the rocker then being moved by the corresponding cam as the latter rotates. Different blades are inserted to select different cams or combinations of cams. The device may be fitted in or on the sewing machine in any position, for example in the same position as the selector control of the zig-zag sewing machine described in Specification 792,328. In a second embodiment (Fig. 8, not shown) the bush 120 and the blade are replaced by a control member in the form of a crank-shaft, having cheeks connected by connecting members corresponding to crank-pins. One connecting member is provided for each cam follower and the control member is rotated by a knob to present the appropriate connecting member as a contact surface opposite that follower selected to be operative. In a third embodiment (Fig. 1, not shown), a control member rotatable in the rocker by a knob is provided on its surface with a helical ridge. The member is rotated to present a part of that ridge opposite the selected follower to form a contact surface. The ridge has an oblique side so that the tapered end of each follower may ride up on to its crest as the member is rotated. The length of the ridge may be curtailed so that for one angular position of the member all the followers are inoperative.
Patent GB-156869-A (GB)
Title: Improvements in or relating to cocks or taps
IPC: F16K27/12
Filed: 1919-10-03
Abstract: 156,869. Booth & Co., Ltd., S., and Webster, F. A. Oct. 3, 1919. Protecting covers; leakage, preventing.-In taps or cocks having caps on the spindles to facilitate cleaning, the cap d<2>, Figs. 1, 5, and 9, is screwed to an upstanding part of the casing d which partially encloses the stuffing-box and may be integral with the casing a, as shown in Fig. 1. The part d may, however, be screwed to the casing a, as shown in Fig. 5, or split longitudinally, as in Fig. 9, and secured at the lower end by undercut and plain projections d<3>, d<4> and at the upper end by the screwed cap d<2>.
Patent GB-1148371-A (GB)
Title: Improvements in or relating to electrochemical cells
Inventor: BURTON GEORGE EDWARD
IPC: G01N27/416
Filed: 1965-06-10
Abstract: 1,148,371. Electro-chemical analysis. W.A. WISEMAN. May 26, 1966 [June 10, 1965; Dec.9, 1965; April 23, 1966], Nos.24548/65; 52415/65, and 17872/66. Heading G1N. In an electro-chemical cell for the determination of oxygen comprising a cathode and anode separated by and in contact with a porous e. g. P. V. C. electrolyte carrier, the oxygen being absorbed at the cathode to produce an E.M. F., a battery and series resistance are connected in assisting polarity across the cell to magnify its response. Temperature compensation may be provided by a pair of cells mounted side by side and connected in a bridge circuit, one cell having a standard gas supply.
Patent GB-916666-A (GB)
Title: Improvements in or relating to voltage regulating systems
IPC: H02J7/24
Filed: 1959-07-17
Abstract: 916,666. Voltage and current limiting systems for generators. BOSCH G.m.b.H., ROBERT. July 17, 1959 [Jan. 12, 1958], No. 24570/59. Class 38 (4). A system for regulating the output of a shuntexcited generator 10 has, in series with the generator field winding 14 a power transistor 40 regulated by a control transistor 41 coupled thereto by a transformer 42 having a primary winding 50 in series with the collector, and at least one secondary winding 45, 46 in series with the emitter, the two windings being wound cumulatively. A Zener diode 43 breaks down when a proportion of the rectified generator output voltage exceeds a determined value, thus temporarily unblocking the transistor 41 which blocks the transistor 40. A current limiting system 23-28, 30-32, also temporarily blocks the transistor 41 through a rectifier 60 at a determined load current. The system may be used with an A.C. generator by the insertion' of rectifiers 20. Specifications 835,210 and 835,834 are referred to.
Patent GB-371735-A (GB)
Title: Propelling device for torpedoes with multiple turbine engines
IPC: F42B19/18
Filed: 1931-09-01
Abstract: 371,735. Turbines. SILURIFICIO WHITEHEAD DI FIUME SOC. ANON., Fiume, Italy. Sept. 1, 1931, No. 24583. Convention date, Sept. 2, 1930. [Class 110 (iii).] Two or more turbines A<1>, A<2>, A<3>, Fig. 2, fed with motive fluid in series are arranged in regular star formation about a central shaft with their axes substantially parallel to the axis of the central propeller shaft C, which is driven by the turbines through pinions also arranged in regular star formation. The exhaust of the last turbine of the series is led to the central hollow shaft. In a modification, Figs. 4 and 6, one or more turbines A<1>, A<3> drive a hollow shaft C<1> in one direction, and other turbines A<2>, A<4> drive an inner concentric hollow shaft C<2> in the opposite direction ; a train of gears b<3>, b, b<1>, b<4> is interposed between at least two turbines, one in each group, to correlate the speeds of the shafts.
Patent GB-673622-A (GB)
Title: Improvements in or relating to a portable combined blower and vacuum cleaner
IPC: A47L5/36
Filed: 1950-10-10
Abstract: 673,622. Centrifugal separators. ROLLINSON, E. W. (Breuer Electric Mfg. Co.). Oct. 10, 1950, No. 24704/50. Class 23 [Also in Group XXVIII] A vacuum cleaner comprises a filter head 26 having a tangential air inlet 62 communicating through an annular duct 59 with a dirt receptacle 61 from which the air passes through a bag filter 43 supported. by a frame 42, to an outlet 38 connected through a flexible conduit 39 with a centrifugal fan 8 driven by an electric motor 12, the end of the conduit 39, which is carried by an arm 91 pivoted on a pin 78, being movable by a lever 92 from the fan inlet 88 to the fan outlet 89 for blowing air in a reverse direction through the filter for cleaning it or for using the apparatus as a blower. A filter 101 may then be secured to the end of a hose 63 to prevent dirt passing therethrough into the atmosphere. In another embodiment of filter, Fig. 6, a dirt deflector 105 is provided below the filter bag 43 and has radial blades 106, disposed substantially normal to the helical upward path of the air, for deflecting the dirt particles into the receptacle.