baber/WOPTO huggingface dataset:
Patent GB-1191822-A (GB)
Title: Polyimides
Inventor: LONG FRANK
IPC: C08G73/10
Filed: 1967-02-03
Abstract: 1,191,822. Polyimide coatings. MONSANTO CHEMICALS Ltd. 8 Jan., 1968 [3 Feb., 1967], No. 1018/68. Divided out of 1,191,821. Addition to 1,191,821. Heading B2K. [Also in Divisions B5 and C3] A condensation polymer is made by reacting an amine containing two or more primary amino groups with a polycarboxylic anhydride obtained by heating an aromatic polysulphonyl halide, an aromatic intramolecular carboxylic anhydride having replaceable nuclear hydrogen atoms, and a third aromatic compound having replaceable nuclear hydrogen atoms, under conditions such that sulphur dioxide and a hydrogen halide are evolved, or with a derivative of the said polycarboxylic anhydride, e.g. the corresponding free acid or a partial ester thereof. Apart from the replaceable nuclear hydrogen atoms, the anhydride must be inert with respect to the sulphonyl halide, and the third aromatic compound to the sulphonyl halide and the anhydride. The sulphonyl halide and the anhydride may be similar to those used in the parent Specification and the products may be used in a similar manner. The preferred third aromatic compound is terphenyl. In Examples (I) a polyanhydride is prepared from phthalic anhydride, isomeric terphenyls and m-benzene disulphonyl chloride, and heated with p-phenylene diamine to give a hard, insoluble and infusible resin. Some of the polyanhydride is refluxed with anhydrous ethanol to give a partial ester, which is dissolved in chloroform and mixed with a chloroform solution of p-phenylenediamine, and this is used to impregnate asbestos felt mats, which, after drying, are combined into a laminate by heat and pressure. (2). A polyester and its partial ester are prepared similarly, and portions of both, together with p-phenylenediamine, are dissolved in N-methylpyrrolidone. Mild steel bars, treated by boiling in chloroform pickling in aqueous hydrochloric acid containing diphenylthiourea, washing. scrubbing with scouring powder, rinsing with water and methylated spirits/aectone mixture, and storage under chloroform, are heated and sprayed with two coats of the above composition, followed by two or more coats of a similar composition containing silica or silicon carbide fillers, which are cured by a final heat treatment, with or without intermediate heat treatments. The coatings withstand prolonged heating in air, and in 10% sulphuric acid.
Patent GB-925109-A (GB)
Title: Process for the production of boron triaryls
IPC: C07F5/02
Filed: 1961-01-10
Abstract: Boron triaryls are made by reacting a boron compound including within its structure both B-C and B-H bonds, or a mixture equivalent to such a compound, under moisture-free and air-free conditions with a purified aromatic hydrocarbon.  The starting material may be an alkylated boron hydride B2RxHy, wherein R is an alkyl radical, x + y = 6, and x is an integer from 1 to 4.  It is also possible to use boron trialkyls in the presence of hydrogen, mixtures of N-trialkyl borazanes and boron trialkyls, or mixtures of boron hydrides and boron trialkyls.  The process is preferably effected at a temperature between 150 and 450 DEG C.  The process may be carried out continuously in a reactor heated to 180 DEG -200 DEG C. provided with means for the continuous evaporation of readily volatile by-products such as unreacted alkyl diboranes, boron alkyls and aromatic hydrocarbons.  Examples describe the preparation of boron triphenyl, an isomeric mixture of boron tritolyls, boron tri-p-xylyl, and isomeric trinaphthylboron compounds.  Specification 854,919 is referred to.
Patent GB-413013-A (GB)
Title: Improvements in toy guns
IPC: F41C3/08
Filed: 1933-01-12
Abstract: 413,013. Toy guns. COOPER, C. G. R., 84, Swinburne Road, Putney, London. Jan. 12, 1933, No. 1101. [Class 132 (iii).] A toy gun comprises a pair of feeding rollers between which a cap strip is fed across a stationary anvil by continuous rotary movement of a handle also actuating a hammer detonating the caps in turn. The cap strip 25 passes between an anvil 22 and a hammer 21 at the end of a spring influenced channelled hammer lever 18 pivoted at 19 and also passes between two rollers 15, 26, the roller 15 being secured to the shaft 14 actuated by the crank handle 17 and the roller 26 having a neck portion 27 resting in a notch in a spring influenced lever 28. The rollers 15 and 26 or the roller 15 alone are knurled or serrated to frictionally grip the cap strip. The end of the lever 28 extends outside the casing 10 and can be moved downwardly to separate the rollers 15 and 26 to allow the cap strip to be threaded therebetween. A cam 16 is secured to the shaft 14 and on rotation of the crank handle 17 engages with a tongue 23, bent outwardly to extend through a slot 24 in the wall of the casing 10, to alternately cock and release the hammer 21. The size of the hammer 21 is such that at least one cap is always disposed beneath the hammer. The casing 10 is formed from sheet metal and is integral with a barrel 11, the rear end of the casing 10 being provided with a D-shaped handle 12, which, if desired, may serve as a stand in conjunction with a pair of pivoted legs 13 arranged to fold for packing purposes. According to the Provisional Specification the top roller or rollers may be mounted on the free end of a pivoted and spring controlled lever ; the caps may be in the form of a coil mounted on the gun ; the gun is vertically and horizontally adjustably mounted on a tripod, the gun being pivoted to a base rotatably and detachably mounted on the tripod ; the casing may cover all or part of the mechanism ; and the parts of the gun may consist of metal stampings.
Patent GB-231954-A (GB)
Title: Improvements in and relating to signalling devices for motor road vehicles
IPC: B60Q1/34
Filed: 1924-01-15
Abstract: 231,954. Dadswell, G. Jan. 15, 1924. Road-traffic signals on vehicles; semaphore signals; mechanical telegraphs.-An aperture frame 7 rotates in a recess 4 at either end of a casing 1 and carries a coloured glass 14 bearing an indication 19. The frames are keyed to a shaft 10 which is turned in either direction bv means of cables 24, 25 secured to a pulley 21 thereon, and to a pulley 26 controlled by a hand lever 29 having a spring detent 30 cooperating with stops on a quadrant 28. A lamp 20 is mounted within the casing 1. The shaft 10 may alternatively be turned in one direction by means of a cable, and in the other by meansof a spring, the cable being controlled through a. lever.
Patent GB-909348-A (GB)
Title: Apparatus for operating rows of hoist drums
IPC: F16D13/24
Filed: 1961-01-11
Abstract: 909,348. Controlling friction clutches. NOJIMA, T. Jan. 11, 1961 [May 23, 1960], No. 1138/61. Class 80 (2). [Also in Group XXX] A plurality of hoist drums 1, Fig. 1, for closing the gates of a dam, are selectively driven from a common shaft 2 extending through the drums and drivingly connected through remotely controlled friction clutches associated with each drum 1. Each clutch comprises multiple wedges 19, Fig. 2, engageable between frusto-conical driving and driven surfaces 16, 18 of annular members 15, 17 attached to the drum 1 and the driving shaft 2. The wedges 19 are attached to a flanged plate 20 and are actuated by non- rotary pistons 27 through an axially slidable plate 23 and a conical roller thrust bearing 24, 25. Clutch return springs 32 are provided between the wedges 19 and a thrust ring 33.
Patent GB-991982-A (GB)
Title: Improved tape transport loop-positioning servo system
IPC: G11B15/58
Filed: 1963-01-10
Abstract: 991, 982. Automatic loop position control. INTERNATIONAL BUSINESS MACHINES CORPORATION. Jan. 10, 1963 [Jan. 11,1962], No. 1174/63. Heading G3R. The position of a loop of tape 32 in a container 10 is adjusted by a gain control in a circuit by which the difference between a loop position signal and a datum signal is used to control the speed and direction of a reel motor 66. With the tape at rest, the difference signal becomes zero when the loop reaches a central position, by adjustment of the datum by variable impedance 144. An oscillator 146 supplies the datum signal and the tape position sensor 16, which may be the variable capacitance device described in Specification 898,467. The difference signal is derived in a device 141 whose output may be D.C. or A.C., of a polarity or phase sense according to whether the loop is above or below the rest position, which depends upon the direction of rotation of capstan 20. A rate of change term is added at 152 and the magnitude of the combination and hence the loop displacement is adjusted by gain control impedance 155 before being amplified to control reel motor 66. The rate of change term is such that the system is overdamped when the reel is empty and underdamped when it is full. In a modification (Fig. 3, not shown) the sensor comprises a flexible conductor insulated on both sides, which is drawn against a conducting wall by semivacuum, by an amount corresponding to the position of the loop. Also, the difference signal is in the form of two D.C. voltages above and below the datum respectively, derived by a differential system employing transistors. The gain control is a rheostat connected between the two voltages after the rate term has been added as before, the circuit now includes a non-linear network which maintains small currents of equal magnitude and opposite polarity through opposite direction inputs of the reel motor when it is at rest and the difference signal is zero. It is stated that the gain cony trol and rate term could operate directly on the loop position signal.
Patent GB-1171023-A (GB)
Title: Packing Elements for Gas-Liquids Contacting Apparatus.
Inventor: LERNER BERNARD J
IPC: F28F25/08
Filed: 1967-01-09
Abstract: 1,171,023. Contacting gases with liquids. B. J. LERNER. 9 Jan., 1967 [10 Jan., 1966], No. 1192/67. Heading B1R. A packing element 10 for use in gas-liquid contacting apparatus such as gas-liquid contacting towers comprises two spaced apart elongated end openings 12a and 14a angularly disposed with respect to each other and interconnected by four tapered walls 15, each adjacent wall being tapered in an opposite direction. In a preferred form as shown in Fig. 1, end openings 12a, 14a are at right angles and coaxially positioned with respect to each other and are elliptical in shape. The packing element 10 which may be formed from a cylindrical tube (see Figs. 3-5, not shown) can be of ceramic, metal or plastics material.
Patent GB-157339-A (GB)
Title: Improvement in toothed wheels or worn-wheels with exchangeable teeth
IPC: F16H55/12
Filed: 1921-01-10
Abstract: 157,339. Salenius, E. G. N. March 11, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Toothed wheeds.-The detachable teeth 3 of worm and spur wheels are secured in position by staples 4 each engaging w i t h two adjacent teeth and having straight or clenched limbs passing through a plate 1 which has a perforated rim 2 to receive the teeth 3. A disc 6 retained in position by bolts 7 or by a nut 8 completes the wheel.
Patent GB-997370-A (GB)
Title: Process for recovering fluorine values from the electrolytic production of aluminium
IPC: C01F7/54
Filed: 1962-01-12
Abstract: Fluorine values are recovered in the form of cryolite from the smokes emitted in the electrolytic production of aluminium by separating the dusts from the smokes and washing all or part of the dust-free gases in a hydrofluoric acid medium, washing all the gases in an alkaline medium, passing the washed gases to waste, calcining the extracted dust with sodium carbonate, washing the calcined mixture with water and cycling the resultant sodium fluoride solution to the alkaline gas washing stage, neutralizing the effluent from the latter to a pH or 6-8 with at least a part of the liquor from the acid washing step, and adding aluminium sulphate to the mixture to precipitate cryolite. In a modification of the process a part of the liquor obtained in the acid washing process and containing hydrofluoric acid is reacted with sodium aluminate to precipitate cryolite the remainder being used to neutralize liquors from the alkaline washing step after which cryolite is obtained by precipitation with aluminium sulphate.  In a further modification of the process the portion of the acid wash liquors not used for neutralization of the alkaline liquors is recycled to the acid washing process.  The alkaline liquors used for washing the gases may contain sodium hydroxide and/or sodium carbonate.
Patent GB-1472501-A (GB)
Title: Pneumatic percussive machines
IPC: E21B4/14
Filed: 1975-01-13
Abstract: 1472501 Percussion drill A GIEN and B L GIEN 13 Jan 1975 1283/75 Heading B4C A percussion drill has a hollow stepped piston 8 reciprocating along an axial member 21 in a cylinder which has a clapper valve 23 at its upper end to direct compressed air alternately along two fluid paths 19, 20. To raise the piston air passes through ducts 19 and 24 (Fig. 1) into the chamber 11 inside the piston, and thence through ducts 13 into the chamber 28 below the piston. As the piston rises air from the chamber 27 above the piston escapes via duct 25, and through the bore 10 in the piston, and past the bit 2. When the piston has been raised (Fig. 2) blocking the duct 24 the valve flips over closing duct 19 and opening duct 20 so that compressed air enters the top chamber 27 and drives the piston down to strike the bit 2, or alternatively an anvil (not shown). When the whole drill is raised the bit descends (Fig. 3, not shown) until it rests on the flange 3. The piston also descends further until duct 24 opens into the top chamber. Compressed air does not flow through ducts 13 now to raise the piston, but vents from the top chamber via duct 25 and bore 10. The drill is thus inoperative until it is lowered again on to the bit which then moves upwards and raises the piston again.
Patent GB-864628-A (GB)
Title: Improvements in or relating to cam assemblies
IPC: F16D1/06
Filed: 1959-01-14
Abstract: 864,628. Cams, securing together and on shafts. GENERAL MOTORS CORPORATION. Jan. 14, 1959 [Jan. 23, 1958], No. 1363/59. Classes 80 (2) and 80 (3). For operating a time switch, a cam assembly, shown exploded in Fig. 1, comprises a number of cams 9 . . . 17, which, to ensure assembly in correct sequence, are each formed with a pair of slots intersecting at the cam axis and aligned so that the slots form rows in which the lengths of the slots in one row increase from one end of the assembly and the lengths of the slots in the other row increase from the other end of the assembly, and two step-tapered members 36, 37 each having interfitting slots 39, 45, are passed through the respective rows of slots, the radial shoulders of the steps co-operating with the opposite axial faces of the cams to locate them in axially-spaced position. The assembly is held together by two end-plates 57, 63, engaged by riveted-over lugs on the members 36, 37. The assembly is keyed at 73 to a shaft 43 which passes through semi-cylindrical depressions 47 on the stepped members.
Patent GB-1426656-A (GB)
Title: Sea-platform
IPC: B63B27/24
Filed: 1974-01-11
Abstract: 1426656 Marine offshore platforms INGECO SpA 11 Jan 1974 01403/74 Heading B7S [Also in Division F2] A marine terminal for loading or discharging tankers comprises a jacket of tubular columns 1 and an annular member surrounding the upper end of the jacket to act as a protective fender and which is formed by an annular plate 8 with depending wooden rubbing strips 9 which is flexibly connected to the jacket by way of separate piles of resilient elements 10 attached to a support 7 of the jacket. Each element comprises a substantially cylindrical central part made of resiliently yieldable material, e.g. rubber, and two projecting flanges at either end thereof and adjacent flanges in each pile are bolted together whilst the two flanges at the ends of each pile are connected to the support 7 and plate 8 respectively. The piles of elements are formed into units of four piles per unit by plates 12 which are located between flanges of two adjacent elements 10 and the plates 12 are interconnected by tie rods 13 so that the units are arranged uniformly around the plate 8, see also Fig. 3 (not shown). The platform also has a rotatable arm carrying a union 6 connectible to a hose whose other end is attached to a vessel.
Patent GB-1079051-A (GB)
Title: Adhesive composition
Inventor: GRANT IAN JAMES
IPC: C09J123/12
Filed: 1964-01-13
Abstract: Adhesive compositions comprise a propylene polymer at least the major proportion of which is in the syndiotactic configuration. Preferably the polymer contains no stereoregular structure other than syndiotactic.  The compositions may be used for bonding glass, metal, wood, ceramic, leather, rubber and synthetic resin articles, and particularly for making twistless yarns and non-woven fabrics from glass, nylon, polyethylene terephthalate, isotactic polypropylenes, viscose rayon, acrylic and polyacrylonitrile fibres.ALSO:Natural, inorganic and synthetic thermoplastic articles may be bonded under pressure and/or heat with a propylene polymer at least a major proportion of the structural units of which are in syndiotactic configuration.  Cohered, twistless, filamentary yarns may be prepared by applying to multifilament yarns a solution of syndiotactic polypropylene and drying and in Example 1 multifilament yarns of glass, nylon, polyethylene terephthalate, isotactic polypropylene, viscose rayon, acrylic and polyacrylonitrile filaments are treated with a n-heptane solution of syndiotactic polypropylene, passed through squeeze rolls and dried by heating to form cohered, twistless, multifilament yarns. Paper-like fabrics may be prepared by calendering webs of fibres treated with or incorporating syndiotactic polyproylene.  In examples carded webs of (2) fibres of the materials specified in Example 1 treated with powdered syndiotactic polypropylene and (3) fibres spun from mixtures of isotactic and syndiotactic polypropylene are calendered between steel rolls at 130 DEG C and 3 tons per square inch to form paper-like fabrics.
Patent GB-783346-A (GB)
Title: Improvements in or relating to valve circuits for phase-amplitude characteristic correction
Inventor: COOPER VICTOR JAMES
IPC: H04N9/64
Filed: 1955-01-18
Abstract: 783,346. Valve amplifying circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 4, 1955 [Jan. 18, 1955], No. 1468/55. Class 40(6). An amplifier in which the phase-shift/frequency characteristic is a function of signal amplitude comprises a valve 5 with non-linear anode and cathode impedances A, K respectively. As shown, each impedance comprises a resistor A2, K2, respectively shunted by a rectifier A3, K3 in series with a blocking condenser A5, K5. The circuit elements are so chosen and the biases applied to the rectifiers from potentiometers A4, K4 so set that for low frequencies the distortions introduced by the networks A, K balance out and the amplifier is linear. At higher frequencies, however, an additional condenser A1 shunting the anode load destroys the balance and causes the phaseshift to vary with signal amplitude. Additional variable resistors A6, K6 may be used in order to obtain a desired characteristic. As shown, the amplifier is preceded by a cathode-follower 2 with D.C.-restoring diode 3 in its grid circuit. The arrangement is more particularly intended for use in colour picture transmission, to apply correction for non-linear phase distortion produced in the modulator.
Patent GB-980348-A (GB)
Title: Gas chromatographic apparatus
IPC: G01N30/20
Filed: 1963-01-14
Abstract: 980,348. Gas chromatography apparatus. BECKMAN INSTRUMENTS Inc. Jan. 14, 1963 [Feb. 7, 1962], No. 1557/63. Heading B1L. A gas chromatograph comprises conduit means for directing carrier gas in series through a sample inlet device 16, a pre-splitter column 20, a valve 24, a main column 64, and a detector 12, said valve serving in one position to pass the gas in one direction through the main column and in a second position to reverse the flow of gas through the main column. The numerals refer to Fig. 1, in which the pre-splitter column 20 separates components having long elution times while those with short elution times pass through rapidly. In the position of the valve shown in Fig. 1, after passing through the column 64, the short elution time gas components pass to the detector 12, leaving the slow components in the main column 64, in the order in which they emerged from the auxiliary column 20. By raising the movable member 28 the valve 26 is switched to its backflush position and carrier gas enters column 64 in the reverse direction. Thus the slower components are eluted from column 64 in the reverse order to that in which they entered, and the peaks as recorded on the detector will likewise be in reverse sequence.
Patent GB-396067-A (GB)
Title: A new or improved coal vase or box
IPC: F24B15/04
Filed: 1932-01-19
Abstract: 396,067. Coal vases. MARSH, S. A., 57, Tarvin Road, Chester. Jan. 19, 1932, No. 1587. [Class 52 (i).] A coal vase 1 divided internally by a gridlike separator 7 is provided with a loose scoop 4 having an inclined end.
Patent GB-524998-A (GB)
Title: Improvements in and relating to mills for grinding, dispersing and homogenizing material in a more or less viscid condition
IPC: B02C23/00
Filed: 1939-01-17
Abstract: 524,998. Grinding paints or other viscid material. SONSTHAGEN, L. A. Jan. 17, 1939, No. 1599. [Class 59] A mill for grinding viscid material, such as paint, has means for collecting the vapour given off and passing it to a condenser. As shown the roller of a mill is partially enclosed in a casing 5 and the vapour given off is withdrawn through a perforated pipe 14a, which extends parallel to the roller, and is delivered to the spaces between two dished plates 11, 12 in the lower part of a condenser 6. The condenser has cooling coils 10 separated by apertured plates 10a. Vapour is condensed and the condensate falls to the bottom of the condenser and air is returned to the mill by a fan 13 through a pipe 14. The hopper supplying the material to the mill may be closed and vapour given off in the hopper passed to the condenser. The pipes 14, 14a have joints 16 so that the condenser can be readily disconnected and used with another mill. A hand-actuated valve may be provided for admitting air to the casing and a similar valve for allowing discharge of air passing from the condenser.
Patent GB-640545-A (GB)
Title: Method and machine for use in the manufacture of leather gloves
IPC: C14B1/26
Filed: 1948-01-19
Abstract: 640,545. Stretching leather. HALLEN, O. Jan. 19, 1948, No. 1634. [Class 76] [Also in Group VII] A machine for working leather glove blanks comprises a roll 1 mounted for rotation in the frame of a table 3 which carries a horizontallydisposed clamping bar 4 spring-raised from the table top and adapted to be lowered by a foot pedal, not shown. A transverse rod 10 carrying slidable gauge rollers 11 is connected at each end to bolts 8 which are movable against springs 9 urging them into transverse bores 7 formed in each end of the clamping bar 4. The space between the rollers 11, pressing down on to a blank 6 held fast under the clamping bar 4, is adjusted so that the blank is drawn out to the desired width, and the rollers 11 are prevented from turning by bearing against a friction surface on the clamping bar 4.