baber/WOPTO huggingface dataset:
Patent GB-1269567-A (GB)
Title: Modified polyamide resins
IPC: C08G69/48
Filed: 1969-07-23
Abstract: 1,269,567. Paper. HERCULES Inc. 23 July, 1969 [24 July, 1968], No. 37154/69. Heading D2B. [Also in Divisions Cl and C3] A water-soluble resin for imparting wet and dry strength to paper may be obtained by reacting (1) a basic polyamide obtainable by condensing (a) a polyamine RHN[(CH 2 ) m . CRH.NR'] n  (CH 2 ) m  CRH, NHR or RHN[CRH . (CH 2 ) m NR'] n  (CH 2 ) m  CRH . NHR where each R is independently H or alkyl and R' is H or aminoalkyl, m is 1 to 5 and n is at least 1, with (b) a polycarboxylic acid or an ester, amide or anhydride thereof, with (2) sufficient acrylamide or alkacrylamide to react with all the primary and secondary amino groups present, and reacting the adduct of (1) and (2) with (3) 0.05 to 5 moles of a compound containing at least 2 aldehyde groups per mole of (alk) acrylamide in the adduct. Up to 50% of the amine sites in the resin may be alkylated, e.g. with an alkyl sulphate or epihalohydrin, before, during or after the reaction of (1) with (2). Numerous reactants are mentioned. Aqueous solutions, preferably of pH 1 to 8 may be used to impart increased dry and wet strength to paper and may contain conventional paper-making additives e.g. alum, rosin size, colourants, mineral fillers, starch or casein. Treating Paper. The resin may be added before, during or after formation of the paper e.g. before or after refining the pulp, at the fan pump or head box, spraying on the wet web, tub sizing preformed paper or spraying dried paper sheets. The paper may be kraft, sulphite or bleached or unbleached semichemical paper but is preferably paper towelling or tissues. Besides improving strength the resin may also be used as a retention aid. Ex. 12 relates to its use as a retention aid for kaolin filler in bleached kraft paper.
Patent GB-364298-A (GB)
Title: Improvements in slide rules
IPC: G06G1/04
Filed: 1930-12-10
Abstract: 364,298. Logarithmic calculators. BRIERLY, H. O., 36, Old Change, London. Dec. 10, 1930, No. 37247. [Class 106 (i).] A slide rule of circular form comprises a frame b in which is either fixed or rotatably mounted a disc c having secured to it a central disc d and a number of concentric rings e. In between the disc d and the rings e are fitted slidable rings f having the dove-tailed form shown. The various relatively movable edges bear scales and a cursor. not shown, is pivoted about the central axis g. The rings have thumb-depressions to enable them to be rotated.
Patent GB-366652-A (GB)
Title: A process for the separation of caoutchouc from aqueous caoutchouc dispersions with the aid of alternating current
IPC: C08C1/14
Filed: 1930-12-10
Abstract: Caoutchouc is deposited from an aqueous dispersion thereof by passage of alternating current between electrodes of materials known as pairs for galvanic batteries whose effective areas are substantially different, e.g. in the ratio 1 to 10.  Examples are given in which a carbon electrode and a smaller zinc electrode are employed, the greater deposit taking place on the latter.  The electrodes are preferably connected to a tapped transformer or to a potentiometer connected across a transformer.  An ammonium salt, preferably ammonium acetate, may be added when treating commercial latex.  The invention is applicable to deposition from natural or artificial, vulcanized or unvulcanized dispersions of balata, guttapercha or natural or synthetic rubber-like hydrocarbons and from concentrated latices.  The dispersions may contain fillers and other customary additions.
Patent GB-1176399-A (GB)
Title: Indole Derivatives
Inventor: CHEMERDA JOHN MARTIN
IPC: C07D209/28
Filed: 1967-08-16
Abstract: 1,176,399. Indole derivatives. MERCK & CO. Inc. 16 Aug., 1967 [25 Aug., 1966], No. 37644/67. Heading C2C. Indole derivatives of the general formula wherein R is a methoxy or dimethylamino group, are prepared by treatment of a solution of a bromo- or iodo-substituted indole derivative of the general formula wherein R<SP>1</SP> is hydrogen or an aralkyl group, X is a bromine or iodine atom and X<SP>1</SP> is hydrogen or X, with hydrogen in an acid medium and in the presence of a hydrogenation catalyst. Novel bromo- or iodo-substituted indole derivatives of the second general formula above are prepared by reaction of an indolyl-3-acetate and a benzoyl chloride derivative of the respective general formulµ wherein R<SP>11</SP> is a C 1-5  alkyl or aralkyl group, in the presence of an alkali metal hydride, followed by de-esterification, e.g. by acid hydrolysis, when an indolyl-3-acetate of the general formula wherein R<SP>11</SP> is a C 1-5  alkyl group, is produced.
Patent GB-523226-A (GB)
Title: Improvements relating to clutch control mechanism
IPC: F16D67/02
Filed: 1938-12-29
Abstract: 523,226. Operating friction clutches. ALEXANDER, E. S. Dec. 29, 1938, No. 37710. [Class 80 (ii)] A pulley b to be driven carries a conically surfaced replaceable clutch block c adapted to be engaged by a corresponding surface on a pulley a driven by a belt. The two pulleys are held in or out of engagement by a spring blade d secured to the pulley a, the free end of the blade engaging faces e or f on a sleeve g. This sleeve, which is free on a spindle i to which the pulley b is secured, carries the pulley a and has a pin-and-slot engagement therewith. Integral with the pulley a is a disc j having opposed conical faces j<1>, j'. A lever m mounted on a spindle n and actuated by a handle q, has two arms carrying respectively a friction block r and a roller v adapted to engage opposite faces of the disc. The block r is of asbestos or asbestos and cotton impregnated and bonded with synthetic resin. By pressing the block r against the face j<1> the pulley a is slowed down to reduce shock on engagement, and then moved to the right to engage the surface c. The clutch is disengaged by pressing on the surface j<2> by the roller v. A coiled spring acts upon the lever m to keep the block r out of contact during driving.
Patent GB-1321509-A (GB)
Title: Azepine derivatives
IPC: C07D498/04
Filed: 1971-08-13
Abstract: 1321509 Hypotensive &c medicines DR KARL THOMAE GmbH 13 Aug 1971 [14 Aug 1970 2 June 1971] 38160/71 Heading ASB [Also in Division C2] Pharmaceutical compositions having hypotensive, sedative, antitussive and/or antiphlogistic activity, for oral, rectal or parenteral administration, comprise a compound I: (in which R 1  is H, C 1-4  alkyl, C 1-4  hydroxyalkyl, allyl, cycloalkyl, hexahydrobenzyl, phenyl, phenylethyl or benzyl, the benzyl group optionally being substituted by 1 or 2 halogen atoms, 1 to 3 methoxy groups, a CF 3  group or a C 1-3  alkyl group, X is O or S, and R 2  is H, C 1-5  alkyl, allyl, cycloalkyl, phenyl, benzyl or phenylethyl, with the proviso that when X is O, R 2  is H) or a pharmaceutically acceptable acid addition salt thereof, together with a pharmaceutical carrier. The compositions may also comprise other active ingredients, e.g. codeine phosphate and 2, 6-bis-(diethanolamino)-4, 8-dipiperidino-pyrimido [5, 4- d] pyrimidine.
Patent GB-350501-A (GB)
Title: Improvements in the manufacture and production of vat dyestuffs containing halogen
IPC: C09B5/34
Filed: 1929-12-13
Abstract: Anthraquinone-acridones containing halogen are obtained by treating a 1-arylimino-anthraquinone-2-aldehyde or -21-aldehyde, having a free position orthoto the iminogroup in either the anthraquinone or benzene nucleus, with halogens or agents supplying halogens; halogenating catalysts and acid-neutralizing agents may be added. According-to examples, 1-phenylaminoanthraquinone-21- aldehyde is treated with chlorine under varying conditions and solvents, and with sulphuryl chloride to give blue to red vat dyes, 1-phenylaminoanthraquinone-2-aldehyde is treated with chlorine in various solvents, and 1-(21 : 41 : 51-trichlorophenylamino)-anthraquinone-2-aldehyde, 1 : 5-diphenylamino anthraquinone-2-1 : 211-dialdehyde and 1-phenylamino-6- or -7-dichloroanthraquinone-21-aldehyde (mixed or the former alone) are similarly treated with chlorine. Aryliminoanthraquinone 21-aldehydes substituted in the anthraquinone nucleus or the benzene nucleus and -2-aldehydes substituted in the benene nucleus are obtained by condensing the corresponding substituted or unsubstituted 1-aminoanthraquinone 2-unsubstituted or -aldehyde-substituted, with a corresponding o-chlorbenzaldehyde or substituted benzene, respectively.
Patent GB-1143002-A (GB)
Title: Improvements in or relating to wheatstone bridge circuit arrangements
Inventor: STEEL RICHARD CRAWFORD
IPC: G01L9/04
Filed: 1965-09-08
Abstract: 1,143,002. Analyzing gases electrically. SERVOMEX CONTROLS Ltd. Nov.22, 1966 (Sept.8, 1965], No.38292/65. Heading G1N. In apparatus for identifying a gas by its thermal conductivity by passing the gas over a heated resistor and measuring the cooling effect, the heated resistor 5 forms one arm of a bridge circuit, whose imbalance is amplified at 11 and fed back as the bridge supply voltage, whereby the current through the heated resistor 5 is stabilized at the value that balances the network, and the current I fed into the bridge or the voltage V across it is indicative of the gas flowing past the resistor 5. One arm 4 of the bridge may comprise an automatic temperature compensation resistor.
Patent GB-924243-A (GB)
Title: Improved polyethylene compositions
IPC: C08L23/06
Filed: 1959-11-11
Abstract: A mixture consists of polyethylene of melting point within the range of 126 DEG  to 136 DEG C., and density between 0,93 and 0,98 with 2 to 50% calculated on the mixture of an amorphous copolymer of ethylene and one or more homologues of ethylene containing 3 to 18 carbon atoms or an amorphous copolymer of ethylene and 4-phenyl-butene, or vinyl-cyclohexene, which has been obtained by polymerizing a mixture of an organo-aluminium compound and a compound of an element of Group IV-VIII of the Periodic Table. The other component of the copolymer may be butene-1, methylpentene-1, octadecene-(1), pentene-(1), hexene-(1), or 5:5-dimethylhexene-(1). The copolymer may contain three components, e.g. a terpolymer of ethylene, propylene, and butene-(1).  The mixture may be used to make articles such as buckets, bowls, bottles, tubes, cable sheaths, foils or films.
Patent GB-1122992-A (GB)
Title: Apparatus for converting mechanical energy into heat energy or vice-versa, including hot-gas engines and cold-gas refrigerators
IPC: F28D17/02
Filed: 1965-09-08
Abstract: 1,122,992. Refrigerating. PHILIPS' GLOEILAMPENFABRIEKEN N.V. 8 Sept., 1965 [11 Sept., 1964], No. 38380/65. Heading F4H. [Also in Division F1] In a cold-gas refrigerator having a piston 2 and a displacer 3 connected by rods 5, 4 to a driving mechanism, primary fluid, i.e. gas, from a compression space 6 passes through a water-cooled cooler 8, a recuperator 9 where it gives up heat to a secondary fluid, i.e. liquid or gas, and a freezer 10 to an expansion chamber 7. After expansion the resulting low temperature primary fluid on its return to the compression space absorbs heat from the freezer and reabsorbs the heat stored in the recuperator. The secondary fluid in the recuperator is moved to and fro in thermally-insulated ducts 13, 16 in counterflow relation to the primary fluid by a piston 17. The recuperator may be filled with a heat storing material, e.g. lead, mercury, cadmium and/or alloys thereof. In Fig. 2 (not shown) two cylinders are arranged with their axes parallel with their respective reciprocating members operating in phase opposition to those in the other cylinder so that the two opposed fluid flows in the recuperator are formed by the fluid flows associated with the respective cylinders, i.e. one flow provides the temporary heat store for the other and conversely. The displacers may be stepped, Fig. 4 (not shown), so that each cylinder has two expansion chambers, the flow passing from one expansion chamber to the other via an additional recuperator and freezer. In this embodiment the recuperator between the compression space and first expansion chamber may be replaced by a regenerator. In Fig. 3 (not shown) there are three cylinders with their reciprocating members operating 120 degrees out of phase. In Fig. 5 (not shown) a pair of cylinders are arranged to intersect perpendicular to one another with a recuperator at their junction, and expansion chambers and compression spaces, respectively, arranged in adjacent pairs of the resulting four cylinder branches, the coolers and freezers being arranged within the branches and adjacent the recuperator. In Fig. 7 (not shown), with two cylinders each with a displacer therein operating in phase opposition to the one in the other cylinder, a variable volume space (133, 143) at one end of each cylinder is connected through valves with high and low pressure containers (122, 123) connected to a reciprocating compressor (120) through a heat exchanger (121). When at its maximum volume the space is put into communication with the high pressure container to provide a volume of high pressure gas for transference through a cooler, recuperator and freezer to a variable volume chamber (134, 144) at the other end of the cylinder for expansion, and when at its minimum volume the space is gradually put into communication with the low pressure container for expansion of the gas in the chamber to exhaust. In this embodiment the cooler may be cooled by liquid air, liquid nitrogen or a refrigerator (148).
Patent GB-939775-A (GB)
Title: Improvements in or relating to fluid compressors
IPC: F04C29/02
Filed: 1961-10-26
Abstract: 939,775. Rotary compresors. WHIRLPOOL CORPORATION. Oct. 26, 1961 [Nov. 4, 1960], No. 38399/61. Class 110 (2). A rotary compressor of the outwardly-sliding vane type for compressing gaseous refrigerant in a refrigerating system, comprises a cylindrical rotor 31, Figs. 4 and 7, slidably mounting a pair of vanes 46 and secured to a shaft 32 driven by an electric motor comprising a stator 66, Fig. 3, and an armature 70 for eccentric rotation in a cylinder plate 22. The rotor 31, vanes 46 and plate 22 are sandwiched between a front head 21 supporting the shaft 32 and mounting an L-shaped suction pipe 86 and a rear head 23 closed by a cover 24. The compressor and motor are resiliently mounted as a sub-assembly between springs 75, 80 in an outer casing 11 having an inlet 85 for refrigerant gas and containing lubricant which is sucked up during rotation of the rotor through a pick-up tube 61 and distributed through openings 55, sloping passages 57 and passages 56 by centrifugal force to the plane surfaces between the rotor, vanes and front and rear heads and hence through arcuate notches 110 and a passage 34 to lubricate the shaft 32. Lubricant also passes into passages 47 behind the vanes 46 to force the vanes into tight sealing engagement with the cylinder plate bore 30. Also, since the openings 55 and passages 47 communicate with each other, inward movement of the vanes 46 forces lubricant into passages 56. Circular grooves 115, 118 in the surfaces of the front and rear heads respectively collect any high pressure gas tending to leak radially inwardly and passes it through passages 116, 117 to the suction side of the compressor to prevent the gas removing the lubricant from the spaces and the high pressure gas reaching the low pressure lubricant in the tube 61. Compressed gas is discharged through an outlet (not shown) from the bore 30, a check valve (not shown) and an opening in the rear head to a coil 105 encompassing the compressor and terminating in an opening (not shown) in the outer casing.
Patent GB-883026-A (GB)
Title: Improvements in apparatus for freezing liquids
IPC: F25C1/14
Filed: 1957-12-11
Abstract: 883,026. Ice-making. ROSS, A. J. Dec. 11, 1957 [Dec. 12, 1956], No. 38528/57. Class 29 Freezing apparatus comprises a vertical cylindrical refrigerated wall 46 disposed within an outer casing 25 to which liquid is fed through pipe 31 and which has outlets 29 at its upper end for the ice, the ice being removed from the wall 46 and conveyed to the outlets 29 by a rotating resilient helical conveyer 36 which is restrained against longitudinal movement only at its upper end so that it can elongate downwards against its own inherent resilience. As ice builds up on wall 46 it will be engaged by the conveyer which will be retarded in a rotational sense and hence will expand longitudinally and bite into the ice, the increased force ultimately breaking the bond between the ice and wall 46. With the illustrated shape of the operative face 36a of conveyer 36, snow ice is produced but in a modification, face 36a has a rounded projection which produces flake ice. Wall 46 forms the boundary of a refrigerant evaporator and the water level in casing 25 is maintained at a level slightly below outlets 29 by a float valve arrangement. The produced ice may fall into a bin underneath the freezer.
Patent GB-853753-A (GB)
Title: Method and apparatus for cutting screw threads on a workpiece
IPC: B23G1/04
Filed: 1958-11-28
Abstract: 853,753. Screw-cutting lathes. CRI-DAN S.A. Nov. 28, 1958 [Dec. 30, 1957], No. 38540/58. Class 83 (3). [Also in Group XXIV] In a screw-cutting lathe, a thread of varying pitch or depth is cut by a single-point tool, the movements of which are controlled by cams. The longitudinal movement of a carriage 1 of the lathe is controlled by a roller 9 which cooperates with a cam 10 secured to a shaft 11, the opposite end of the shaft carrying a second cam 12 which controls the transverse movement of a carriage 3, by levers 14, 18, 20. The depth of cut of the tool 5 is controlled by a cam 19, intermittently rotated through a ratchet-and-pawl, by a cam 16 on the shaft 11, and the shape at the bottom of the thread is determined by a cam 22. It is stated that two screw-threads of opposite hands can be produced in a single operation. Specification 640,142 is referred to.
Patent GB-1154054-A (GB)
Title: Method for Casting Metals from a Container with a Sliding Nozzle.
IPC: B22D41/46
Filed: 1967-08-22
Abstract: 1,154,054. Discharging molten metals. INTERSTOP A.G. 22 Aug., 1967 [23 Aug., 1966], No. 38707/67. Heading F4B. A molten metal casting container 2, closed by a sliding nozzle 5 is provided with a flexible plug 70 to prevent the molten metal coming into contact with the closed nozzle. On casting, the nozzle is opened and the plug removed by pressure of the metal flowing out from the nozzle. In a modification (Fig. 3, not shown), a rigid plug may be used above the sliding nozzle, which plug is melted on commencement of casting either by the heat of the metal above it or by use of an induction heating coil, or is burnt out with a lance or a torch. The plug may be in the form of a plate.
Patent GB-1355299-A (GB)
Title: Loop restoring apparatus
IPC: G03B21/50
Filed: 1972-08-21
Abstract: 1355299 Cinematography K VOCKENHUBER and R HAUSER 21 Aug 1972 [19 Aug 1971] 38882/72 Heading G2E A loop restoring mechanism for use in a cine projector includes two gear wheels 8, 6 each having a toothless arc (9 on wheel 8). The wheel 8 is connected to drive a loop former having rollers 10, 11 and cam 12 and the wheel 6 is continuously rotated, Reduction in the loop size in film 1 is detected by wheel 11, which is moved by the contracting loop so as to rotate the loop former and co-axially mounted gear 4, thereby rotating the wheel 8, from the starting position shown, so that its teeth can be engaged by the teeth of wheel 6. Wheel 6 then drives the loop former through one revolution, its toothless portion being sychronized to prevent rotation of the loop former during the film advance stroke of an intermittent film feed at the picture gate 2. The loop former creates a loop by virtue of the shape of the semicircular cam 12. Wheels 4, 8 provide a 1:1 ratio so that when the loop former has completed one revolution the toothless arc 9 is aligned adjacent the wheel 6. To prevent overshoot of the wheel 8 after this one revolution a spring finger 22 movable parallel to the axis of wheel 8 between pins 20 is moved up a ramp 17 and dropped over its raised end to engage stop 18 on an adjustably fixed arm 14. The stop extend is shaped to permit the arm 22 to pass underneath it at the start of the next loop forming sequence. To disable the mechanism, during rewind a stop 24 can be placed between the teeth of wheel 4.
Patent GB-1067351-A (GB)
Title: Signal repeater for communication lines
IPC: H04B3/44
Filed: 1964-09-24
Abstract: 1,067,351. Unattended repeaters; transistor amplifier circuits. WESTERN ELECTRIC CO. Inc. Sept. 24, 1964 [Sept. 27, 1963], No. 38921/64. Headings H3T and H4R. In a repeater amplifier, Fig. 1, fed with power over the signal line 10 via power separation filters 11 and 25, the output transistor stage 19 serves to stabilize the voltage applied to the earlier stages of the amplifier by having a Zener diode 21 connected across the base collector and electrodes. A change in impedance of transistor 12, e.g. due to ageing, would result in a tendency for the voltage across lines 24 and 28 to rise which would increase the emitter-base voltage of transistor 19 causing the collectoremitter current to increase to tend to maintain the emitter collector voltage constant. Transistor 19 is a power transistor and the variations in collector current to accomplish the stabilization are negligible compared with its standing current. The power separation filters are shown in Figs. 2 and 3 and they each include transformers 36, 37 and 46, 47, which reduce stray capacitance effects between the signal and power channels.
Patent GB-1268414-A (GB)
Title: Signal-to-noise ratio measuring system
IPC: G01R29/26
Filed: 1969-08-05
Abstract: 1,268,414. Measuring signal noise ratio. INTERNATIONAL STANDARD ELECTRIC CORP. Aug.5, 1969 [Aug.9, 1968], No.39086/69. Heading G1U. To measure the signal to noise ratio of an input signal spectrum of given amplitude located within a given frequency baseband, the input signal is translated in frequency to occupy a given frequency band. This translated signal is coupled to a device having a passband adjacent to but spaced from the given band so that only noise in the passband is passed. This noise is coupled to a logarithmic amplifier and detector providing a D.C. output proportional to the logarithm of the noise. This D.C. output is applied to a recorder calibrated to read signal to noise ratio of the input signal. The input signal, which may lie within a given frequency baseband 1 determined by an FDM communication system in which the signal is to be used, is applied via an attenuator 2 to a mixer 3, where it is heterodyned with a carrier signal from a crystal oscillator 4, to provide an output centred on a frequency close to the centre frequency of a crystal band pass filter 5. This may be e.g. 9À8 MGz. The frequency of crystal oscillator 4 is chosen so that the translated frequency band of the input signal lies just outside the passband of the filter 5. With a constant amplitude input signal, the logarithm of the noise detected in the filter output corresponds with the signal-noise ratio in the input. The D.C. signal from the detector 7 following the logarithmic amplifier is applied to a recorder 8 and may be applied to control an alarm relay 9 associated with the FDM system to protect it from excessive noise.
Patent GB-865518-A (GB)
Title: Lead-free vitreous enamels for light metals such as aluminium and alloys thereof
Inventor: BAALEN GIDEON VAN
IPC: C03C8/08
Filed: 1959-11-18
Abstract: 865,518. Enamels and enamelling. FERRO CORPORATION. Nov. 18, 1959, No. 39094/59. Class 56. A vitreous enamel for aluminium and other light metals is free of lead, cadmium, fluorides, barium and zinc and has the following composition in weight percentages : SiOz 30-42 ; R 2 O 28-45; TiO 2  10-21 ; SbzOs +SnO 2  0-12 ; P 2 O 5  0-5; SrO + CaO 0-5; Al 2 O 3  0-8; B 2 O 3  0-5; X m O n  0-6 where X m O n  represents one or more heavy metal oxides for colouring the enamel and R 2 O represents Na 2 O, Li 2 O and K 2 O in the following proportions Na 2 O 20-35; L 2 O 0-5; K 2 O 3-14. Examples of batches and the preparation and application of the enamels are given. Specification 634,655 and U.S.A. Specification 2,608,490 are referred to.