baber/WOPTO huggingface dataset:
Patent GB-734456-A (GB)
Title: Improvements relating to the production of polyamides
Inventor: MIGHTON HAROLD RUSSELL
IPC: C08G69/20
Filed: 1953-05-21
Abstract: Epsilon-caprolactam is polymerized in the presence as catalyst of an alkali metal hydride.  Polymerization is complete in 3-10 minutes at 230-255 DEG  C., further heating degrading the polymer. Low polymerization temperatures favour high intrinsic viscosities and high temperatures rapidity of polymerization.  The polymers formed at low temperatures contain smaller quantities of water extractables. The cyclic amide should have a water content below about 0.02 per cent.  In examples (1) e -caprolactam containing 0.005 per cent water was polymerized at 255 DEG  C. in an atmosphere of nitrogen using 0.5 mol. per cent of lithium hydride.  The intrinsic viscosity of the polymer varied from 2.28 for a heating time of 5 minutes to 0.78 for a heating time of 8 hours.  The polymer was powdered and extruded into a film which remained clear on longitudinal stretching.  (2)e -caprolacta was polymerized at 255 DEG  C. in 4-5 minutes in the presence of 0.5 mol. per cent of lithium hydride, the polymer having an intrinsic viscosity of about 1.02.  (3) Samples of e -caprolactam were polymerized in the presence of 0.5 mol. per cent of lithium hydride at various temperatures and over different periods of time. Figures are given for the intrinsic viscosities of the resulting polymers and their content of water extractables.  (4) e -caprolactam was polymerized at 255 DEG  C. in 7 minutes in the presence of sodium hydride, the polymer having an intrinsic viscosity of 1.40 and containing about 10.5 per cent of water extractables.
Patent GB-419865-A (GB)
Title: Improvements in air (or gas) compressing plants
IPC: F01B7/08
Filed: 1934-05-11
Abstract: 419,865. Air compressors. GRENET, G. DUCLOS-, 6, Rue Denis-Papin, St.-Etienne, Loire, France. May 11, 1934, No. 14300. Convention date, May 11, 1933. [Class 8 (i).] The upper piston a of a pair of internal-combustion engine pistons working in a cylinder A drives a compressor piston d secured to it. By holding the compressor inlet valves f open, the assembly becomes an ordinary engine ; alternatively the compressor piston may be detached from the motor piston. The upper face of the engine piston a, or one face of the compressor piston d may compress scavenging air.
Patent GB-1262122-A (GB)
Title: Improvements in fluidizing apparatus
IPC: B65D88/72
Filed: 1969-03-19
Abstract: 1,262,122. Pneumatic conveyers. FULLER CO. 19 March, 1969 [15 April, 1968], No. 14378/69. Heading B8A. The floor of a silo 1 for pulverized material is provided with a plurality of fluidizing lines 12, 13 surrounding a material outlet in the floor or side of the silo, each line including a plurality of fluidizing units 10 arranged substantially adjacent each other and each unit having a plenum chamber beneath a gas permeable surface and having its own fluidizing gas supply pipe. The supply pipes serving all the chambers in one line 12 or 13, all pass into the radially innermost chamber, one of them opening thereinto whilst the others extend therethrough into the adjacent chamber, into which one of the remaining pipes opens, and so on. The units 10 are seated in channels in the floor of the silo and the channels are covered by gratings 21. The gas permeable surface is partially supported over the plenum chamber by one of the gas pipes passing therethrough, this pipe being supported on straps extending between side walls of the chamber. The silo floor is divided into quadrants, each of which has a separate fluidizing gas circuit fed from a common main gas control valve automatically controlled in accordance with a pre-selected timing cycle, to supply gas to one quadrant at a time. Manually operable valves within each quadrant circuit facilitates control of the fluidizing in the silo in accordance with the changing distribution of the material therein.
Patent GB-144542-A (GB)
Abstract: 144,542. Haddan, A. J. H., (National Cash Register Co.). March 7, 1919. Looking-devices.-In a cash register or like machine provided with means for printing on a record strip, and having a normally locked, main operating-mechanism released by depression of a key, this release is prevented, and the machine consequently locked, when the record strip is exhausted. The invention is shown as applied to the machine described in Specification 144,373, and as utilizing the motor operating mechanism set forth in Specification 17534/08, [Class 106 (i), Calculating &c,]. A spring- influenced lever 54, Fig. 4. normally engages a notched disk 53 connected with the clutch and released by a curved arm 56 when a shaft 57 is rocked by the depression of a special transaction key 75, 76. The lever is raised automatically for resetting by a pin 69 on a gear wheel connecting the clutch with the main shaft of the machine, this pin engaging the end of a link 67 pivoted to the lever 54. The depression of a key 75 or 76 lowers a plate 111 by the engagement of a pin on the key stem with a curved slot 112 in the plate. A supporting-arm 114 for this plate is connected bv a pin-and-slot with a sleeve 117 provided with an arm 133, Fig. 7, abutting against a pin 131 on the arm 132 mounted on a shaft 57. When a transaction key is depressed the sleeve 117 is rotated, the arm 133 releases the pin, and a spring effects the rocking of shaft 57 and consequently the release of the locking-lever 54. A pivoted arm 445 having a roller pressing upon the paper on the supply roll 406 is connected with a vertically slidable plate having a shouldered flange 456. When the supply of paper is exhausted, this plate has risen sufficiently to allow a pin 458 on a yoke 459 to pass under the shoulder, and another pin 463 to come in front of the end of an arm 84 supporting the usual key detent plate 110 which is thereupon locked and the transaction keys and machine rendered inoperative.
Patent GB-593599-A (GB)
Title: Improvements in or relating to hurricane lamps
IPC: F21V37/00
Filed: 1945-06-07
Abstract: 593,599. Lamp chimneys. ISSOTT, W. E. June 7, 1945, No. 14455. [Class 75 (ii)] A hurricane lamp is fitted with a globe consisting of hinged side sections 1 of sheet metal or other suitable material having apertures for the reception of glass, mica, or transparent plastic panes, one section also having hinged to its upper and lower edges a top plate 4 and base plate 2 having peripheral flanges 5, 3 to hold the side sections in position. The plates 4, 2 are also formed with central flanged apertures, the flange on the base plate resting in a hinged gallery 8 and the flange 10 on the top plate being engaged by a movable retaining ring 11. Two of the sections 1 may be connected by a detachable pin so that when removed from the lamp the globe can be laid out flat for storage.
Patent GB-1377415-A (GB)
Title: Process for the dyeing of natural and synthetic polyamide fibre material
IPC: D06P1/649
Filed: 1972-03-28
Abstract: 1377415 Dyeing polyamide fibres CIBAGEIGY AG 28 March 1972 [29 March 1971] 14460/72 Heading D1B Natural and synthetic polyamide fibre materials are dyed by an exhaustion process in which the fibres are treated with a solution or dispersion of a difficultly water-soluble disperse dye salt consisting of the anionic radical of an anionic dye and a cation derived from an isothiourea derivative capable of salt formation in a water immiscible organic solvent of boiling point above 50C which contains 0.1% to 100% of water relative to the weight of the material to be dyed and optionally up to 5% of an acid. The cation may be of formula: in which R 1  R 2  and R 3  each independantly represents hydrogen or an aliphatic, cycloaliphatic, araliphatic or aromatic hyydrocarbon radical or R 2  and R 3  together with form the radical of a partially saturated ring, and B represents an unsubstituted or substituted alkyl or alkenyl group having up to 22 carbon atoms which can be interrupted by one or more hetero atoms, a cyclohexyl group or an unsubstituted or substituted aralkyl group. Preferred organic solvents are tri- and tetrachloroethylene, acetic and formic acids being the preferred acids. Dye compositions comprise a solution or suspension of a dye salt as above in said solvent containing 0.5 to 5% by weight (based on total weight of liquor) of water and 0 to 0.5% of an acid.
Patent GB-1171468-A (GB)
Title: Improvements in or relating to the Manufacture of Semiconductor Devices
IPC: H01L21/52
Filed: 1966-07-08
Abstract: 1,171,468. Laminates. NATIONAL SEMICONDUCTOR CORP. 8 July, 1966 [8 July, 1965], No. 14489/69. Divided out of 1,171,467. Heading B5N. [Also in Division H1] The subject-matter of this Specification divided from Specification 1,171,467, relates to the formation of a structure consisting of spacedapart wires sandwiched between pressuresensitive-adhesive tapes. In the embodiment, gold-plated wires 32 (Fig. 2) are inserted manually or automatically in spaced groups of grooves formed in circumferential ridges flanking a central magnetized track on feed-wheel 94 so that their ends are held against the underlying adhesive surfaces of glass-fibre backed tapes 45, 47 fed from supply reel 102. Further tapes 44, 46 are pressed on by rubber roller 112 to sandwich the ends of the wires.
Patent GB-475531-A (GB)
Title: Improvements in or relating to thermionic oscillation generator circuits
IPC: H03B19/10
Filed: 1936-05-22
Abstract: 475,531. Valve circuits for generating oscillations. STANDARD TELEPHONES & CABLES, Ltd., and JACOBSEN, B. B. May 22, 1936, No. 14550. [Class 40 (v)] In a system in which a back-coupled valve generates one or more selected harmonics of a master frequency fed to its grid-circuit, a resistance is shunted across the frequencydetermining circuit to reduce the phase change and/or amplitude change of voltages passing round the feed back loop when the wanted multiple frequency differs substantially from the frequency of the frequency-determining circuit. The arrangement can be made always to generate only an exact multiple of the master frequency however the frequency-determining circuit is tuned. In one circuit, Fig. 1 (not shown), in which only one harmonic is utilized, the harmonic generator is similar to that shown in Fig. 2, the frequency-determining circuit being shunted by a resistance 8, but the coil 2111 is coupled to an amplifier valve through resistance and a circuit tuned to the frequency of the wanted harmonic. In Fig. 2, however, this circuit is omitted and there are present in the output circuit of the valve 12 a frequency equal to that of the harmonic nearest to the resonant frequency of the tuned circuit 3, 2<1> and also, owing to intermodulation between this harmonic and the master frequency MF, the next adjacent harmonics of MF above and below it. The resistance 8 has a lower value than in Fig. 1 (not shown). All three frequencies are directed to their appropriate paths by band filters having coils 23 which are tapped to enable inequalities between the amplitudes of the different harmonics to be corrected. In the design of the filter terminations, account is taken of the dissipation of the coils 23, 19 and preferably the dissipations of the coils form the main part of the filter terminations. The tuned circuits such as 27<1>, 28<1> in the output circuits of the valves 24 energize cross talk between the systems when the arrangement supplies several multi-channel carrier systems. The valve 1 may be so biassed that in the absence of any impulse from MF it would remain quiescent.
Patent GB-1008068-A (GB)
Title: Improvements in carrier bags
IPC: B65D33/16
Filed: 1963-04-11
Abstract: 1,008,068. Stud and socket fastenings. H. F. GATWARD. July 3, 1964 [April 11, 1963], No. 14620/63. Heading E2B. [Also in Division H4] A paper carrier bag 1 side gussetted at 4 has moulded plastic handles 2 with integral stiffeners 3 welded or secured adhesively or by fasteners to the outer mouth edges of the bag and the stiffeners are provided with interengaging projections 5 and holes 6 for closing the bag. The stiffeners may be slit to engage on the tops of the edges.
Patent GB-600944-A (GB)
Title: Process of preparing finely divided products applicable to dyestuffs and pigments
IPC: C09B67/14
Filed: 1945-06-08
Abstract: Organic colouring matters (e.g. vat dyes and pigments) are produced in a finely-divided state by dissolving them in a mixture of sulphuric acid or oleum and an organic liquid insoluble in water but soluble in the said sulphuric acid or oleum without any chemical transformation, and then in precipitating the treated product by an addition of water or ice, the sulphuric acid being sufficiently concentrated to ensure dissolution of the colouring matter and the organic liquid.  Organic liquids specified are nitrobenzene, and the liquid nitrotoluenes.  In examples, the following dyestuffs are dissolved in a mixture of nitrobenzene and sulphuric acid and precipitated with water: (1) 5.7.51.71-tetrabromo-indigo; (2) 5.7.51.71-tetrachloroindigo; (3) 21.21 - diphenyl - 1.2.5.6 - anthraquinonylene-bis-thiazol; (4) copper phthalocyanine; (5) 4.41-dibenzoylamino-diphthaloylcarbazol; (6) a chlorinated derivative of N-dihydro - 1.2 - 11.21-anthraquinone azine; (7) 6.61-diethoxy-2.21-bis-thionaphthene-indigo; (8) bis-b -naphtho-thionaphtheneindigo.
Patent GB-825181-A (GB)
Title: Improvements in or relating to apparatus for securing a hatch cover on a hatchway
IPC: B63B19/26
Filed: 1957-05-08
Abstract: 825,181. Multiple fastenings; clamps. LINDHOLMENS VARV A. B. May 8. 1957 [May 8. 1956], No. 14690/57. Class 44 [Also in Groups XVIII and XXXIII] A hatch cover 4 is provided with a securing device, comprising a housing 5, with a threaded support 6 on which two rollers 7 are rotatably mounted, and a spindle 8 in threaded engagement with the support 6 but rotatably mounted in the housing 5. Sealing flanges 2 and roller tracks 3, are provided on two opposite sides of the hatchway, the roller tracks extending about half the length of the hatchway. On rotating the winged head 9, the casing is lifted so that the rollers 7 bear against the lower side of flange 2, and the hatch cover is pressed down against the upper side of the flange 2. The hatch cover 4 is released by opposite rotation of the winged head and the rollers 7, rest on the track 3 enabling the cover to be displaced along the hatchway. To open the hatchway completely an aperture 10 is provded in the flange 2 so that the cover may be rotated through 90 degrees as shown in Fig. 2. To obtain a complete seal between the hatch cover and the flange 2 a peripheral hollow channel 11 containing a gasket 12 may be provided on the cover.
Patent GB-586360-A (GB)
Title: Improvements in or relating to door, furniture and like hinges
IPC: E05D5/04
Filed: 1945-05-23
Abstract: 586,360. Hinges. CALDWELL, S. B., and HURLEY, E. May 23, 1945, No. 14713/44. [Class 65 (ii)] A leaf or butt hinge having two leaves a, b, Fig. 1, has the leaf b, which is made from a piece of metal removed from the leaf a, formed with one or more tongues b<2> which project through slots b<3> and the hinge pin is off-set on the side of the leaf opposite to the projecting tongues. The corners x, x<1>, Fig. 4, so formed receive the door and frame respectively and ensure alignment of the faces of the door and frame when the door .is closed. A third leaf member f may be stamped out of the member b to prevent the pinc from bending and to strengthen the attachment to the door or jamb.
Patent GB-953979-A (GB)
Title: Improvements relating to abrading tools
Inventor: BAILEY HERBERT
IPC: B27G17/04
Filed: 1962-04-17
Abstract: 953,979. Woodworking. DART SPRING CO. Ltd. Feb. 20, 1963 [April 17, 1962], No. 14725/62. Heading B5L. In a tool for surfacing wooden chopping blocks used by butchers and having a head 10 and a projecting arbor 17 which is adapted to be screwed into a tapped quill of a rotary electric or other portable motor, or to be gripped in a chuck on the output shaft of a portable appliance, the arbor screw-engages the head which has a hole 18 providing access to a slot 19 in the arbor, whereby the arbor may be held against rotation by a screwdriver engaging the slot whilst the head is unscrewed. The head consists of a hub part 10 which receives the arbor 17 and is formed with a recess 11 for a spring 12 urging a head-plate 13 against the heads of bolts 14 in the hub. The plate is secured to a housing carrying cutting teeth 16 arranged in a double annular row. A cover 20 having a flexible skirt surrounds the tool. Specifications 935,436 and 935,437 are referred to.
Patent GB-626059-A (GB)
Title: Method for the purifying by electrostatic precipitation of halogens more particularly of chlorine, when produced by electrolytical processes
IPC: C01B7/07
Filed: 1946-05-16
Abstract: 626,059. Electrostatic precipitation. KREBS & CO. May 16, 1946, No. 14762. Convention date, Jan. 7. [Class 39 (i)] In a method of purifying by electrostatic precipitation a halogen, for example chlorine or hydrochloric acid gas, produced by electrolysis, sulphuric acid is added to the gas in an amount sufficient to coat particles of impurity, in a manner to produce a mist having a high conducting character, subsequent to the drying of the gas and prior to the electrostatic precipitation. The hydrochloric acid gas may subsequently be used in the liquid phase.
Patent GB-332975-A (GB)
Title: Improvements in connection with albums for gramophone record holders
IPC: B42F5/00
Filed: 1929-05-11
Abstract: 332,975. Wilson, F. May 11, 1929. Albums.-In an album for gramophone records of the kind in which envelopes or pockets D, Fig. 3, are mounted at their edges on a backing-sheet G, which is attached at one end to a cover A of the album, the backing-sheet is hinged to each pocket and is also hinged between adjacent pockets, so that it can be collapsed to bring the pockets into a block, as shown in Fig. 4, or can be extended into an approximately flat condition, as shown in Fig. 1, so as to separate the edges of the pockets stepwise.
Patent GB-785914-A (GB)
Title: Improvements in or relating to egg packs
IPC: B65D85/32
Filed: 1956-05-14
Abstract: 785,914. Egg packs. BEST, F, R. July 3, 1956 [May 14, 1956], No. 14870/56. Class 18. An egg pack made of moulded pulp comprises hinged base and lid portions 1, 4 having egg pockets 7, the lid having apertures 16 through which the eggs may be viewed when the pack is closed. The base portions 1, 2, 3 and the lid portions 4, 5, 6, are joined together by means of weakening lines 15 and 14 respectively, and the base and lid portions are also hinged by weakening lines 12. The lines of weakness have cut-out portions 13, 14A, 15A. The holes 16 also act to ventilate the pack.
Patent GB-1300402-A (GB)
Title: System for record medium control and editing
Inventor: HURST ROBERT NORMAN
IPC: G11B27/02
Filed: 1969-03-21
Abstract: 1300402 Video magnetic tape recorders RCA CORPORATION 20 March 1970 [21 March 1969] 14948/69 Heading G5R [Also in Division H4] In a colour video tape recorder in which alternate pictures differ (due to 180 degrees phase shift in the colour sub-carrier), the commencement of alternate pictures is indicated by single and double pulses respectively to facilitate editing. The pulses may be rendered visible by the use of carbonyl iron suspension. During recording, pulses at picture frequency from generator 28, 30 are fed to circuits 34 to 42 to produce alternately single and double pulses which are applied through head 24 to a longitudinal control track on tape 2. Video signals are fed to rotating heads 14 and the capstan motor is synchronized over lead 54. During playback, pulses from the control track are fed through circuits 58, 62, 60 and directly to AND circuit 74 to give an output pulse 82 coincident with the doublet pulse only. Alternatively, by reversing switch 72, pulses are produced coincident with each type of pulse. The output pulses are fed to the video playback circuit 16 and also the capstan control circuit 22.
Patent GB-757564-A (GB)
Title: Continuous production of pentaerythritol
Filed: 1954-05-21
Abstract: Pentaerythritol is prepared by a continuous process of condensing acetaldehyde with formaldehyde comprising forming an aqueous stream containing acetaldehyde, a substantial excess of formaldehyde and an inorganic base, the inorganic base being introduced in a manner such that thorough mixing is effected in less than 2 minutes, passing the aqueous stream through a reaction zone in which it remains for a time sufficient for reaction to proceed to the desired extent, acidifying the effluent from the reaction zone, continuously distilling formaldehyde from the acidified effluent and recovering a pentaerythritol containing liquor.  Suitable inorganic bases are for example, sodium hydroxide, calcium hydroxide or potassium hydroxide. A preferred starting mixture contains (by weight) 3 per cent of acetaldehyde, 20 per cent of formaldehyde and 77 per cent of water and it is desirable that the formaldehyde should contain less than 1 per cent of methanol based on the total weight of the mixture.  The preferred reaction temperature is 130-140 DEG  F.  The alkaline mixture leaving the reactor should be acidified, for example, by addition of acetic acid, formic acid, sulphuric acid or hydrochloric acid, to prevent side reactions.  The reaction liquor is then distilled to separate aqueous unreacted formaldehyde as distillate, leaving behind an aqueous solution of pentaerythritol and other non-volatile reaction products.  Preferably some of the formaldehyde-containing distillate is recycled.  After the distillation the pentaerythritol-containing liquor may be concentrated and cooled to crystallize out the pentaerythritol which may be further purified by recrystallization or otherwise.
Patent GB-981079-A (GB)
Title: Improvements in and relating to pumps
Inventor: PRICE RICHARD HECTOR
IPC: F04B53/10
Filed: 1960-04-28
Abstract: 981,079. Reciprocating pumps. SAUNDERS VALVE CO. Ltd. April 28, 1961 [April 28, 1960], No. 15015/60. Heading F1A. A diaphragm pump for corrosive liquids has automatic means whereby pumping ceases above a predetermined delivery pressure. The suction stroke is effected by a crank 34 acting through a roller 36, slipper 37, rubber buffers 41 and a collar 42 on connecting rod 44. The delivery stroke is effected by a spring 43 which is dimensioned to remain compressed if the required delivery pressure is exceeded. Slipper 37 is slidable on rod 44 and is held in continuous engagement with roller 36 by a spring 38. Housing 51 contains lubricant and is sealed from the diaphragm. The pumping chamber and liquid passages may be coated with corrosionresisting materials. The valve assembly Fig. 2 comprises a resilient annular delivery valve 26 biased against a disc inlet valve 23. On the suction stroke, disc 23 moves to the left and on the delivery stroke valve 26 moves away from disc 23, excess pressure in delivery passage 19 acting to hold disc 23 closed.
Patent GB-612200-A (GB)
Title: Improvements in sludge blasting apparatus for treating metal articles
IPC: B24C7/00
Filed: 1946-05-17
Abstract: 612,200. Sludge-blasting. TILGHMAN'S PATENT SAND BLAST CO., Ltd., and ANKERS, R. T. May 17, 1946, No. 15020. [Class 60] A sludge-blasting apparatus comprises a lowlevel tank into which drains the sludge delivered on to the work from a blast nozzle f, the collected sludge being pressure-fed to a highlevel tank and thence to the blast nozzle, means being provided for agitating the sludge in both tanks and for closing a valve through which sludge drains into the lower tank. Sludge from the articles under treatment in chamber a drains past valve k into a drainage tank i; an air jet n is provided beneath the valve k for the purpose of forcing the latter on to its seat so that air pressure imposed through pipe o will deliver the sludge through pipe h to the upper tank g. The tank g, which is provided with an overflow pipe p, has an outlet pipe q leading to the blast nozzle f. Pipes m in the tanks g and i deliver compressed air into the sludge to prevent settling of the grit content.