baber/WOPTO huggingface dataset:
Patent GB-710032-A (GB)
Title: Organic acid esters of cellulose
IPC: C08B3/00
Filed: 1952-04-30
Abstract: Cellulose is impregnated with an aldehyde in the liquid phase, and subsequently brought into contact with an organic acid anhydride and subjected to esterification in the presence of an esterification catalyst and at least sufficient of a solvent for the cellulose ester to dissolve it as it is formed.  The acid anhydride may be that of an aliphatic acid containing 2-4 carbon atoms in the molecule and the catalyst may be sulphuric acid in an amount of 0.2-5 per cent. of the weight of the cellulose.  The aldehyde may be formaldehyde or acetaldehyde, and if desired it may be used in the form of a polymer that reacts as the aldehyde, e.g. paraldehyde.  A proportion of 0.5-4 per cent. of aldehyde based on the weight of the cellulose may be used.  In producing cellulose acetate a proportion of 600-800 per cent. of acetic acid based on the weight of the cellulose may be used to dissolve the cellulose ester as it is formed.  The cellulose may be subjected to an activating pre-treatment and the aldehyde may be added to it before, during, or after such treatment. Pre-treatment with acetic, formic, propionic or butyric acid, with or without sulphuric acid, may be effected, and the aldehyde may be added to the pretreating liquid.  Esterification may be carried out so that the maximum temperature is between 30 DEG  and 85 DEG  C.  The cellulose acetate or other ester may be ripened in the esterification solution, preferably after addition of water and after partial or complete neutralization of the sulphuric acid catalyst, e.g. by addition of sodium acetate or magnesium acetate. After ripening to the desired extent, the cellulose acetate or other ester may be precipitated, washed and stabilized.
Patent GB-235357-A (GB)
Title: Improvements in wind screens for automobiles
IPC: B60J1/00
Filed: 1924-05-03
Abstract: 235,357. Johnson, F. A. L. May 3, 1924. Windscreens.-In a vehicle windscreen of the multi-panel type, the side-screen 7 is pivotally mounted between supporting-members 8, 9 which are pivoted on the main screen pillar 5, so that the side-screens are capable of a pivotal adjustment independent of the pivotal movement of the supporting members about the pillar 5. Preferably the hinge-pins 10 of the side-screen are located near the middle of the top and bottom members of the frame 7<a> and are engageable in sockets in the arms 8, 9, the upper socket being split and capable of being tightened on the pin 10 by a screw 11. A locking joint is also provided between the end 8b of the arm 8 and the pillar 5. A clip 12 having a loop or eye 12a may be engaged with a stud on one of the main screen sections 6 so as to retain the entire screen in a folded condition.
Patent GB-1496442-A (GB)
Title: Luminous discharge display devices
IPC: H01J17/49
Filed: 1975-03-17
Abstract: 1496442 Cathode-ray display tubes SIEMENS AG 17 March 1975 [18 March 1974] 10975/75 Heading H1D A cathode-ray display tube, e.g. for symbolic display or colour television comprises an envelope filled with a gas such as argon and containing a common cathode 5, a luminescent screen electrode 6 and an insulating plate 1 having a matrix of cells 2 and carrying on one surface an anode structure 3 consisting of parallel conductors each passing round a row of cells 2, a gas discharge being supported in use between the structure 3 and the cathode 5, the other surface of the plate 1 carrying conductors 4 perpendicular to the structure 3 to which modulating voltages may be applied, the distance between the conductors 4 and the screen 6 being such that a high voltage (several thousand volts) applied to the screen 6 to attract electrons from the gas discharge through the cells 2 to impinge on the luminescent material thereon will not result in a gas discharge by virture of the Puschen curve characteristic of the gas filling. For colour reproduction, the number of cells is trebled as is the number of row conductors, for each cell in a monochrome display three cells each corresponding to a primary colour are provided. In Fig. 3 (not shown) a storage facility is provided by means of FETs formed at each cell by row electrodes (17), column electrodes (18) and rims (14) around each cell which respectively act as source, gate and drain electrodes of the FETs when semiconductive material is applied, the rims (14) also co-operating with a metallic layer (13) to form individual storage capacitors for each cell.
Patent GB-271058-A (GB)
Title: Improvements in or relating to amplifying transformers
IPC: H01F19/00
Filed: 1927-04-25
Abstract: 271,058. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. May 14, 1926, [Convention date]. Void [Published under Sect. 91 of the Acts]. Transformers. - A transformer for use in amplifying high or lowfrequency currents has one of its windings divided into sections oppositely wound so that currents due to electrostatic coupling between the two windings are mutually opposed in the sections as indicated by the full line arrows, whilst the sections are so connected that currents due to electromagnetic coupling between the windings are in the same direction in the sections as indicated by the broken line arrows.
Patent GB-1526384-A (GB)
Title: Bonding of polyvinylidene fluoride and fibrous materials
IPC: C08J5/12
Filed: 1977-03-16
Abstract: 1526384 Adhesion of polyvinylidene fluoride to fibrous materials PRODUITS CHIMIQUES UGINE KUHLMANN 16 March 1977 [30 March 1976] 11135/77 Heading B2E [Also in Divisions B5 and F2] A curved tank end made by thermoforming a sheet of polyvinylidene fluoride is brushed with a solution of a polyester polyurethane in dimethyl formamide and the resultant prior sprayed with glass fibres.
Patent GB-1298383-A (GB)
Title: Connecting device for providing a single outlet from two pressurised dispensing containers
IPC: B65D83/14
Filed: 1970-03-09
Abstract: 1298383 Pressurized dispensing containers COLGATE-PALMOLIVE CO 9 March 1970 [7 April 1969] 11185/70 Heading F1R [Also in Division B1] A connecting device facilitating the simultaneous mixing and discharge of the contents of two oppositely aligned pressurized containers 11, 12 comprises an upper and lower member 22, 21 adapted to engage with the container rims and having bores 56, 57 within a member 50 for cooperation with their respective valve stems such that on pressing the containers together the contents are discharged into a mixing chamber 58 and to eflux via a spout 51. The upper member 22 has a transverse annular wall 34 integral with the spout and, arranged about the periphery, legs 41, adapted for co-operation with arcuate slots 31 provided in the lower member 21. The engaging of the legs and slots allows the container to be held rigidly apart without relative movement but on rotation of the lower member the legs are guided by the slots into a wider aperture (32), Fig. 8 (not shown) where axial compression of the container and hence actuation of the valves may occur. A non-return valve may be provided in the bores 56, 57 and the containers may also be enclosed in a shaped housing.
Patent GB-814852-A (GB)
Title: Improvements in or relating to the separation of tellurium from selenium
IPC: C01B19/00
Filed: 1957-04-05
Abstract: Metal selenide- and telluride-containing material, e.g. copper refinery anode slime, is leached with an aqueous solution of alkali metal hydroxide, in the presence of oxygen at elevated pressure, and at a temperature above the normal b.p. of the solution.  Selenium thereby passes into solution leaving a residue of tellurium-containing material.  An oxygen pressure of at least 20 p.s.i.g., preferably 60-120 p.s.i.g., a temperature of 150-400 DEG C., preferably 200-250 DEG  C., an alkali metal hydroxide concentration of 5-50 per cent, preferably 10-40 per cent, and a leaching time of at least 5 hours, preferably 10-24 hours, may be employed.  Hydroxides of lithium, sodium, potassium, rubidium and caesium are specified.  Selenium may be recovered from the leach liquor as described in Specification 808,637, or by acidifying e.g. with sulphuric or hydrochloric acid, and treating with sulphur dioxide in the presence of chloride. Tellurium may be recovered from the solid residue in known manner by fusing with alkali and leaching. The residue may first be aerated in dilute sulphuric acid to remove copper.  Selenium- and tellurium-containing materials other than copper refinery anode slimes may be treated provided that the selenium and tellurium is first converted to selenide and telluride if it does not already exist as such.  Other materials specified are sulphuric acid plant flue dust and lead chamber sludge, and selenium- and tellurium-containing vegetation.
Patent GB-309551-A (GB)
Title: Improvements in and relating to elastic fluid turbines
IPC: F01D25/28
Filed: 1929-04-11
Abstract: 309,551. British Thomson-Houston Co., Ltd., (Assignees of Junggren, 0.). April 12, 1928, [Convention date]. Casings.-To economize space in a compound steam turbine plant, the high-pressure turbine 9 is mounted on top of the low-pressure turbine 1, and the turbines drive separate generators 29, 8. Supporting members 10<a>, 11<a>, 26, 28 are provided for the upper turbine and its bearings. The generators 29, 8 may have a unitary field structure, and may be housed in a single casing 31.
Patent GB-278609-A (GB)
Title: Improvements relating to machines for the extraction of fibre from flax and other straws
IPC: D01B1/22
Filed: 1927-04-27
Abstract: 278,609. Gibb, P. G., and Macdonald, D.J. April 27,1927. Breaking apparatus.-Flax and like straws are fed by an apron a, Fig. 1, through a pair of rotary gills c which ensure them being fed endwise through the smooth pressing rollers d to fluted crimping rollers e and to rollers f, one or both of each pair of which has imparted to it a longitudinal traversing movement. The upper rollers f are mounted in spring-controlled bearings g, Fig, 3, and the lower rollers in fixed bearings h in the pedestals j. The reciprocation is obtained by a cam f<2> on the roller engaging a fixed bowl r, and a spring f<1> is arranged at the other end of the roller. The reciprocating rollers may be arranged at the receiving end of a machine for the further treatment of the flax &c.
Patent GB-693401-A (GB)
Title: Pressure control mechanism applicable to pressurized aircraft cabins
IPC: B64D13/04
Filed: 1951-05-15
Abstract: 693,401. Fluid-pressure servomotor control systems. GARRETT CORPORATION. Mav 15, 1951 [May 23, 1950], No. 11288/51. Class 135 Mechanism for controlling the pressure in a pressurized aircraft cabin and of the kind providing atmospheric pressure up to a certain altitude. a constant pressure between that and a second altitude, and a constant differential between cabin pressure and atmospheric pressure above the second altitude has means for limiting the rate of change of pressure within the cabin. A balanced cabin outlet valve 16a is actuated by a diaphragm 20 loaded by a spring 34 and subject on one side to cabin pressure and on the other side to pressure in a control chamber 21 which has a restricted connection 21a with the cabin. An evacuated bellows 24 which actuates a valve 22 controlling a connection 49, 52, 55 with atmosphere is collapsed at lower altitudes so that the chamber 21 is vented, but as the altitude at which the constant pressure is required is reached the bellows 24 expands to throttle the vent and maintain the pressure. At the second altitude a bellows 25 connected internally to atmospheric pressure takes over the control by opening a vent 54 to maintain the constant differential between cabin and atmospheric pressures. The means for limiting the rate of change of pressure consists of a piston valve 51 actuated by a bellows subject externally to cabin pressure and internally also to cabin pressure but transmitted through a pipe 74, a capacity 75 and a restriction 76. During rapid ascent, the bellows expands and causes the piston valve to throttle the connection 49, 52, and during rapid descent the bellows contracts and causes the piston valve to open an additional vent 60 from the chamber 21. Specification 655,601 is referred to.
Patent GB-418493-A (GB)
Title: Improvements in or relating to hydraulic control mechanisms
IPC: B63H25/28
Filed: 1933-03-17
Abstract: 418,493. Hydraulic control mechanisms. CLARK, H. R., 645, Anlaby Road, Hull. March 17, 1933, Nos. 11299/34 and 11300/34, (divided out of 418,434), and 9278/34. Drawings to Specification. [Class 114.] In hydraulic steering gears for ships including a continuously driven pump acting upon opposed rams under the control of an hydraulically actuated hunting valve the hunting valve is contained in a structure separate from the continuously driven pump structure. The drawings and description are identical with those in Specification 418,434.
Patent GB-215552-A (GB)
Title: Improvements in and relating to lubricating systems for engines
IPC: F16N19/00
Filed: 1923-04-26
Abstract: 215,552. Walster, J., and Walster, E. April 26, 1923. Levels, regulating.-In a bird-fountain device for maintaining the level of oil in the sump of an internal-combustion or other engine, means are provided for preventing oil from ascending the air pipe.. In the form shown in Fig. 1, wherein oil and air pipes b, d connect a sealed tank a to the sump through an extension piece c, an air valve f operated by a float g is fitted to the foot of the air pipe d, which is attached to a cap e' screwed to a cylindrical portion c<1> of the extension c. The cap e' is provided with air holes, and the portion c<1> is fitted with a glass sight-tube h. A cock l is provided in the oil pipe b and the tank a is provided with an inspection window. In the form shown in Fig. 3, the valve f is replaced by an anti-siphon device comprising an annular chamber p surrounding the upper end of the open-ended pipe b and connected to the tank a by a pipe q fitted with a cock l. The air pipe d is connected to a sleeve o screwed into the cap e'.
Patent GB-142133-A (GB)
Title: Improvements in or relating to pneumatic hubs for vehicle wheels
IPC: B60B9/18
Filed: 1920-04-23
Abstract: 142,133. Westrum, H. S. van. Oct. 1, 1918, [Convention date]. Spring wheels with continuous outer rigid ring and pneumatic hubs.-Relates to pneumatic hubs in which a plurality of pistons and cylinders are radially arranged between the axle and an inner rim. The pistons are attached to the inner rim a by links journaled in bearing-brasses held together by a clamp-band k, the ends of which are drawn together by a screw s<1>. This construction permits greater amplitude of movement to the bearing-brasses within the piston, and consequently longer strokes are obtained.
Patent GB-145922-A (GB)
Title: Improved construction of stair rod fastening device
IPC: A47G27/06
Filed: 1919-05-07
Abstract: 145,922. Walker, E. R. May 7, 1919. Stair-rod fastenings.-Relates to stair-rod fastenings adapted to be pivoted to the stair riser by a screw passing through a flat part A of the fastening, and having a curved part D for holding the stair-rod. Projections F are provided on the curved part D to facilitate handling, and the appliance is corrugated, for example as shown at I, to strengthen it.
Patent GB-723142-A (GB)
Title: Improvements in or relating to electric megaphones
IPC: H04R27/04
Filed: 1952-05-06
Abstract: 723,142. Public address systems. HERBST, G.S. Nov. 13, 1952 [May 6, 1952], No. 11474/52. Drawings to Specification. Class 40 (4). In an electric megaphone comprising a microphone, a loudspeaker, and a source of current connected in series, the loudspeaker is of the permanent magnet moving-coil type and includes a compression chamber.
Patent GB-580192-A (GB)
Title: Improvements in rotary internal combustion engines
IPC: F02B53/00
Filed: 1944-06-16
Abstract: 580,192. Rotary engines. WELLS, R. G. June 16, 1944, No. 11491. [Class 110 (ii)] In a rotary I.C. engine, the compressor and motor rotors 4 and 13 respectively are mounted eccentrically in their respective cylinders 2 and 3, and contact the cylinder walls as shown. Slots 6 are provided with vanes 5 which contact the cylinder walls and may be guided by slipper blocks 7 sliding in annular guideways 9. The compressor cylinder is provided with air inlet port 10 and fuel inlet port 11, the latter being connected to a carburettor 12. The compressor rotor has three vanes and the motor rotor has four vanes, the rotors being coupled by gearing 19, 20, 21 so that they rotate clockwise with a velocity ratio of 4:3. The compressed charge passes into the motor cylinder through transfer port, 15 and is ignited by sparking plug 16. Exhaust ports 17, 17<1> and 18 are provided. The port 17 may be arranged nearer the port 17<1>, e.g., at 45 degrees below the line 22, so as to increase the duration of the power stroke. Instead of using a carburettor, fuel may be injected into a mixing chamber after the air has been compressed. The inlet and exhaust ports may be controlled by mechanicallyoperated valves. Ignition may be effected by compression or by an electric glow.
Patent GB-723761-A (GB)
Title: Improvements in or relating to bearings or pivotal joints
Inventor: BATTEN JAMES DENNE
IPC: A01D34/34
Filed: 1950-04-13
Abstract: 723,761. Hinges. MASSEY-HARRISFERGUSON (SALES), Ltd. April 13, 1950 [May 2, 1949], No. 11602/49. Class 65 (2). [Also in Group XXXIV] A pivotal joint comprises an internal rotatable element, a pair of opposed members forming a socket for the element, and resilient or spring means sinuously disposed around the periphery of said members to draw the latter together to engage the element. As shown, a ball element 17, Fig. 6, formed with axles 18, is held between opposed, cylindrical socket members 19 by means of a coil spring 23 wound sinuously in V-shaped grooves 21 formed in the respective peripheries of the socket members. The ball joint serves to connect the knife head 1, Fig. 2, detachably to the pitman 26 of a mowing machine. The axles 18 are clamped between the forked end 25 of the pitman by means of a bolt 24 which passes through the ball element. The socket members are enclosed in a cover 27 of sheet metal formed with lugs 28, and the cover is clamped between a pair of jaws 10 formed with hook parts 16 pivotally engaging abutments 8 on the knife head. A bolt 14, when tightened, draws the jaws together, and when loosened allows a spring 12 engaged between projections 11 at the bottom of the jaws to disengage the hooks 16 from the knife head. A lubricator 32 is provided. Alternatively, the socket members may be made of lubricant-impregnated metal.
Patent GB-1401920-A (GB)
Title: Catalysts of polymerization process for their preparation process of polymerization making use of said catalysts and obtained products
IPC: B01J31/02
Filed: 1973-03-09
Abstract: 1401920 Polymerization initiators; polymerizing episulphides SNAM PROGETTI SpA 9 March 1973 [11 March 1972] 11610/73 Headings C3P and C3R [Also in Division C2] Homopolymers, copolymers or terpolymers of (a) episulphides, (b) vinylic monomers, (c) lactone monomers and (d) aldehydes or ketones are prepared by effecting the reaction in a polar solvent in the presence of a catalyst obtained by the reaction of zinc or a Group Ia, IIa or IIIa metal or a hydride, alkyl or amide derivative thereof with a compound where X and Y are SO or SO 2 , R and R<SP>11</SP> are C 1-20  alkyl or cycloalkyl, aryl, aralkyl or alkylcycloalkyi groups or may be bivalent radicals joined together to form a ring, R<SP>1</SP> is a bivalent arylene, cycloalkylene, alkarylene, alkylcycloalkylene or C 1-20  alkylene radical, m is 0 or 1 and n is an integer, preferably 1, 2 or 3. In examples, polypropylene sulphide is prepared by using as catalyst the compounds derived from CH 3 SO(CH 2 ) 6 SOCH 3  reacted with each of the LiBu, NaNH 2 , MgEt 2 , InEt 2  and CH 3 SO 2 (CH 2 ) 6 SO 2 CH 3  with LiBu; and with LiBu. The first such catalyst, which appears to be of formula is also used in examples to prepare homopolymers of ethylene sulphide, acrylonitrile, methacrylonitrile and pivalolactone; copolymers of propylene sulphide with each of ethylene sulphide, acrylonitrile, allyltiranylether (allyloxy - 2,3 - epithiopropane) and methacrylonitrile; block copolymers of propylene sulphide with each of ethylene sulphide, acrylonitrile, methacrylonitrile and pivalolactone; acrylonitrile-methyl methacrylate copolymer; propylene sulphide-ethylene sulphide-allyltiranyl ether terpolymer; and propylene sulphideacrylonitrile-allyltiranyl ether terpolymer. The latter terpolymer and also propylene sulphidepivalolactone copolymer are claimed "per se".
Patent GB-751399-A (GB)
Title: Improvements in or relating to electric switch contacts
IPC: H01H1/16
Filed: 1954-04-22
Abstract: 751,399. Collectors. SUZUKI, K. April 22, 1954, No. 11626/54. Class 38 (1). [Also in Group XXXVII] A contact member, e.g. for a drum-type controller or a tap-changer, comprises a holder with a pair of bearing plates, a roller contact loosely mounted on an axis supported by said plates, and a spring acting axially on the roller to hold one end thereof in contact with one of the plates. In one form, Figs. 2, 5, roller 14 has a boss 12 at one end and a coil spring 15 arranged in a recess 13 at the other end so as to press the boss against the bearing plate 9. The two plates may be integral with, as shown, or attached to (Figs. 7-9, not shown), the holder 1 which is pivoted at 6 to a frame 3 and held against the frame by a spring 7, the relative positions of the frame and holder being set by a screw 8. In a modification (Fig. 4, not shown), a disc or spidershaped spring bears against one end of the roller.
Patent GB-264707-A (GB)
Title: Improvement in safety razors
IPC: B26B21/16
Filed: 1926-05-03
Abstract: 264,707. Rhodes, M. H. May 3, 1926. Razors, safety. A construction of safety razor in which the blade 3 can be adjusted angularly with respect to the handle 1, comprises a blade support of dihedral form, the flattened upper end of the handle being pivoted on a pin 8 between one limb 4 and a tongue 7 struck 'up from the other limb 2 on which the blade 3 rests. The limb 4 preferably has an arcuate edge, and has a segmental offset portion 5 frictionally engaging the handle to retain the support in adjusted position. Adjustment can be effected between the position shown in Fig. 4 and the two extreme positions in which the blade is parallel to the handle, stop projections 11 being provided on limb 4. The blade is retained by a resilient U-form cover-plate 12 bearing on the blade at 13 and on limb 4 at 16. The cover has securing tongues 14 engaging corresponding slots in limb 2 and forming abutment for the rear edge of the blade. Projections 17 are provided on limb 2 to the rear of the blade. When the cover is depressed behind these projections the part 13 is raised, as indicated in dotted lines, to free the blade.
Patent GB-470124-A (GB)
Title: Improvements in or relating to pockets for garments
IPC: A41D27/20
Filed: 1936-04-24
Abstract: 470,124. Pockets for garments. WHYMAN, Ltd., A., and WHYMAN, A. April 24, 1936, No. 11672. [Class 141] In a pocket for a garment for outerwear there is provided an outer piece of material, the marginal portions of which are turned inwardly to meet the edges of the inner piece or pieces of pocket material to which they are secured, so that the pocket seams are wholly on the inner side of the pocket. In the example described, the pocket proper is formed of two pieces of material 1 and 2, and a piece 3 of waterproof material of greater width and depth than the pieces 1 and 2 is turned in at the sides and bottom, the meeting edges of the three pieces being sewn together at 4. The upper edge of the piece 3 is sewn to the piece 2 at 10. The lower portions of the folded-over sides of the piece 3 and the end portions of the bottom folded-over portion of the latter are mitred and seamed together to form mitred corners. The pocket is sewn to the garment at 8 and 9, the usual slit 6 and flap 7 being provided.