baber/WOPTO huggingface dataset:
Patent GB-734823-A (GB)
Title: Improvements in or relating to coumarin derivatives and the process for the manufacture of these derivatives
IPC: C07D311/46
Filed: 1953-08-26
Abstract: Compounds of the general formula <FORM:0734823/IV (b)/1> wherein R1 is an alkyl radical of not more than three carbon atoms are prepared by condensing an alkali metal derivative of a corresponding ((4-chlorophenyl) alkyl methyl) malonic acid diester, wherein the esterifying groups are lower alkyl groups with an acetyl-salicylic halide and heating the resulting (1-(41-chlorophenyl) alkyl)-(2-acetoxy benzoyl) malonic acid diester with an acidic or basic agent such as an alkali metal alkoxide to give a 3-[11-(411-chlorophenyl)-alkyl] - 4 - hydroxy - coumarin.  In an example (11 - (411 - chlorophenyl) - propyl) - malonic acid diethyl ester is converted into the sodium derivative which is reacted with acetyl salicyclic acid chloride and the resulting reaction mixture is heated with sodium methoxide to give 3-(11 - (411 - chlorophenyl) - propyl) - 4 - hydroxy-coumarin.  (1 - (41 - Chlorophenyl) - alkyl) - malonic acid dialkyl esters especially (1-(41-chlorophenyl)-propyl)-malonic acid diethyl ester are obtained by reacting p-chlorobenzaldehyde with an alkyl magnesium bromide, replacing the hydroxyl group in the resulting carbinol by a halogen atom, e.g. by reaction with PBr3, and condensing the halide with a malonic acid ester or an alkali metal derivative thereof.
Patent GB-1430565-A (GB)
Title: Stabilised catechol-alkylamine solutions
IPC: A61K9/08
Filed: 1974-05-28
Abstract: 1430565 Opthalmic preparations BARNESHIND PHARMACEUTICAL INC 28 May 1974 [29 May 1973] 23612/74 Heading A5B Stable opthalmic compositions of pH 5.5-8.5 comprise (a) an aqueous medium, (b) 0.1-10 weight % of a C8-12 4-aminoalkyl catechol, (c) 0.1-5% of a vinylpyrrolidone polymer containing at least 70% vinylpyrrolidone residues, (d) 0.1-2.5% of a borate calculated as boric acid and (e) an antioxidant. The aminoalkyl catechol may be of formula; wherein R and R<1> are H or C1-3 alkyl and X is H or OH, e.g. epinephrine. The polymer may be polyvinyl pyrrolidone or copoly(vinyl pyrrolidone/vinyl acetate). The antioxidant may be erythrorbic acid.
Patent GB-1261625-A (GB)
Title: Structures for surfacing sports areas
IPC: E01C13/04
Filed: 1969-05-09
Abstract: 1,261,625. Surfaces for sports grounds. BADISCHE ANILIN-& SODA-FABRIK A.G. 9 May, 1969 [10 May, 1968], No. 23669/69. Addition to 1,261,624. Heading A6D. [Also in Division B5] A web or board for surfacing a sports area comprises layers a 1 , a 2  and a 3 , the middle layer a 2  being a strip or sheet of 0.1-0.8mm. thick steel or of 0.5-2.5mm. thick plastics material having a Shore A hardness of 40-90 and the layers a 1  and a 3  each being a 3-10mm. thick web or board provided on one side only with parallel ribs of height 1-5mm., cross-sectional area of 2-25mm<SP>2</SP> and spacing of 5-20mm., and made of a thermoplastics material having a mean elongation of from 400-800% and a modulus of elasticity of 60-100 kg/cm<SP>2</SP> and consisting of 100 parts by weight of bitumen, 50-120 parts by weight of an ethylene polymer and, optionally, up to 100 parts of a filler. The ethylene polymer may be a copolymer of 3-70 parts by weight of n-butyl acrylate units per 100 parts of ethylene units. The ribs may be of semi- (or part) circular, square, hemi- (or part) elliptical, rectangular or dove-tailed cross-section. The layers a 1  and a 3  may be made by extrusion or moulding and may be united to the middle layer by bonding or fusion. The structure may be placed into position on or bonded to a sub-grade of red gravel, tufaceous sand, asphalt or cement.
Patent GB-356899-A (GB)
Title: Improvements in or relating to submarine electric communication cables
IPC: H01B11/08
Filed: 1930-08-07
Abstract: 356,899. Submarine cables. SIEMENS SCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. Aug. 7, 1930, No. 23692. Convention date, Aug. 9, 1929. [Class 36.] To reduce cross-talk in a submarine cable of high line attenuation, the pairs of each quad are electrostatically screened from one another. The screens may consist of metallic sheaths applied about each core or pairs of cores or may comprise metal strips which are inserted between the pairs of each quad during stranding. In the construction shown in the Figure, one pair 12 of each quad and the quads themselves are provided with a metallic sheath. In a deep-sea cable having a supporting member for the lead sheath, this member may be of star formation to provide compartments in which the cores or groups of cores are carried. Reference has been directed by the Comptroller to Specifications 5468/81, 15217/93, 14902/98, 22005/05, 222,436, 281,287, 286,676, and 338,359, [all in Class 36, Electricity, Conducting &c.].
Patent GB-1201682-A (GB)
Title: An audio-visual information transmission system
Inventor: ACZEL LASZLO
IPC: G03B23/12
Filed: 1968-05-17
Abstract: 1,201,682. Recording and playback; associated working. ORSZAGOS TANSZERGYARTO ES ERTEKESITO VALLALAT. 17 May, 1968, No. 23695/68. Heading G5R. An audio-visual system comprising a filmstrip projector and a magnetic tape recorder, each of which may be driven both forwards and backwards, is controllable at will by local or remote manual means or by signals recorded on the tape, with remote control facilities for backspacing as desired to repeat information already imparted. The audible text may be recorded on the first and fourth tracks of a four-track tape, with 1 kc./s. control pulses on the second and third tracks.
Patent GB-650617-A (GB)
Title: Improvements in or relating to impedance measuring apparatus
Inventor: COLLARD JOHN
IPC: G01R27/02
Filed: 1947-12-20
Abstract: 650,617. Impedance measuring. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Dec. 20, 1947, No. 33716. [Class 37] [Also in Group XL (c)] A wave-guide for measuring impedance has its width variable by a movable plunger. The impedance 6 to be measured is fed from an oscillator 8 over the wave-guide 1, a transverse slot 4 allowing connection to a voltage measuring device, e.g. a crystal; the width of the waveguide is then adjusted until the detector gives (a) its maximum reading, (b) its minimum reading, and (c) a reading when the effective half-wavelength in the guide is an integral submultiple of the length of the guide from the slot 4 to the impedance 6; these voltages correspond to the maximum and minimum of the standing wave and the voltage at the point where the impedance 6 is connected, and enable the magnitude of the impedance to be calculated. The width of the waveguide is varied by adjustment of block 2, Fig. 2, which is preferably insulated from the walls 1 and may have quarter-wavelength slots 9 to prevent escape of energy. The step between the waveguide 1 and the waveguide 7 connected to the unknown impedance 6 produces a transformer effect which can be overcome by calculating for its effect as in Specification 650,615, [Group XL (b)]. Alternatively, a further quarterwavelength wave-guide may be connected between 1 and 7, having its smaller dimension of cross-section equal to the corresponding dimension of 7 and its larger dimension of crosssection variable so as to maintain the percentage step between it and the wave-guide 1 the same as that between wave-guide 7 and impedance 6, so that the two steps cancel each other in their effects. In a further arrangement, the step is used to offset the change in impedance of the wave-guide 1 as its width varies, since when the step is small the transformer effect varies the effect of the impedance 6 at the same rate as the change in width of 1 increases the impedance of the wave-guide 1, and the ratio of these two impedances remains the same and thus the standing wave ratio remains unaltered; in this case the step must be kept small. To reduce errors due to reflection at the join between the source 8 and the wave-guide 1, a pad 10, e.g. a lossy length of wave-guide, may be inserted; alternatively, a further slot 11 may be used to provide a connection for a meter, and source 8 adjusted to give a constant reading on the meter connected to slot 4 in between readings, the meter connected to slot 11 being used for determining the impedance 6. Specification 562,674, [Group XL], also is referred to.
Patent GB-591869-A (GB)
Title: Process for the production of non-aromatic imines
Filed: 1944-11-28
Abstract: Non-aromatic imines are prepared by condensing a non-aromatic primary amine with a non-aromatic ketone in the absence of a catalyst, the ketone being present in substantial excess of the equimolecular proportion.  Preferably water is eliminated by maintaining a heavy reflux in a dehydrating still.  All or part of the imine may, if desired be removed with the water and subsequently separated by stratification, fractionation, extraction, salting out or the use of drying agents.  An inert mutual solvent for the reactants may be present which may be for example, an alcohol, ester, ether or a hydrocarbon such as toluene or xylene.  The reaction may be carried out in a batch or continuous manner.  Superatmopheric or subatmospheric pressures may be employed.  In the examples methylisobutylketone is reacted with dihydroisophoryl amine, methyl isobutylcarbinylamine and ethylene diamine.  Methylisobutyl carbinylamine is also reacted with acetone.  Other ketones which are specified are methyl ethyl, methyl n-propyl, methyl isopropyl, methyl n-butyl, methyl amyl, diethyl, ethyl propyl, ethyl butyl, ethyl amyl, dipropyl, propyl butyl, dibutyl, butyl amyl, allyl butyl, diamyl, and methyl vinyl ketone.  Cyclopentanone, cyclopentenone, cyclohexanone, cyclohexenone, triacetone amine and 2 : 4-hexanedione are also mentioned.  Examples of other primary amines are ethyl, propyl, butyl, isopropyl, sec-butyl, isobutyl, allyl, methallyl, cyclopentyl, cyclohexyl, isophoryl, and the amyl amines. Propylene diamine, butylene diamine and 4-amino-2 : 2 : 6 : 6-tetramethylpiperidine are also mentioned.  The products may be employed as insecticides and as compounding agents for rubber. They yield secondary amines on hydrogenation preferably in the presence of a catalyst.
Patent GB-615822-A (GB)
Title: Improvements in or relating to gas burners
IPC: F23D14/64
Filed: 1946-08-12
Abstract: 615,822. Gas burners. GREAVES, A. H., and SHORT, R. V. Aug. 12, 1946, No. 23816. [Class 75 (i)] A gas burner comprises a gas jet 2, Fig. 9, of frustoconical shape located and forming an annular air inlet 8 within the tapered lower end of a first mixing tube 6, the upper end of which is externally frusto-conical and located to form a second annular air inlet 14 within the lower end of a second mixing tube 9 which is flared at both ends to form a restriction 10, and the parts are adjustable relatively to one another and are assembled so that (a) the width of the annular air inlet 8 is not less than one-sixth and not more than two-thirds of the diameter of the boring 3 of the tube 6, (b) the diameter of the jet 2 is not less than one-sixth and not more than one half of the diameter of the boring 3, (c) the diameter of the restriction 10 is not less than one and a quarter times and not greater than twice the diameter of the boring 3, (d) the boring 3 has a length at least three times its diameter, (e) the distance between the jet orifice 15 and the extremity 16 of the boring 3 is not less than one-eighth and not greater than threequarters the diameter of the boring, (f) the distance between the extremity 17 of the boring 3 and the restriction 10 is less than one and a half times the diameter of the restriction 10, and (g) the angle subtended in a diametrical plane by the flared wall 18 of the tube 9 is less than ten degrees and greater than one degree. Further preferred dimensions of the burner are also described. The tube 9 is longitudinally adjustable by screwthreading in the casting 19 in which the tube 6 and the jet 2 are mounted ; and in an alternative construction both mixing tubes 6, 9 are longitudinally adjustable in the casting 19 and are screwed in set positions by locking screws. In a further alternative construction one or more further mixing tubes similar to the mixing tube 6 may be provided. Specification 558,086 is referred to.
Patent GB-1601666-A (GB)
Title: Filter device
IPC: A47J31/02
Filed: 1978-05-30
Abstract: The filter device consists of a filter vessel (1) and a filter bag (2) which is inserted in the filter vessel. The outlet (4) of the filter vessel is constructed as a syphon which consists of a bent tubular piece (5) whose intake aperture (6) is arranged directly above the lowest point of the filter vessel (1) and whose outlet aperture (7) is arranged outside the filter vessel and is located lower than the intake aperture (6). This device prevents dripping after completion of the filtering operation. <IMAGE>
Patent GB-614890-A (GB)
Title: Improvements in or relating to rotary electric selector switches
IPC: H01H19/58
Filed: 1946-08-12
Abstract: 614,890. Mechanical switches, without quick action; controllers. TAYLOR, G. Aug. 12, 1946, No. 23843. [Classes 38 (iii) and 38 (v)] A selector switch comprises an insulating body 2, having a bearing 3 for the foot of the rotor spindle 4, an upper bearing 6 being provided in the cover 7. The body carries concentric and radial rows of spring-load contacts 16 with ball-heads to engage similar rows of concave-headed contact studs 12 on the rotor 1. The shanks of these studs are connected by changeable arcuate or radial strips 14 to give predetermined circuit arrangements. The operative positions are located by a spring- pressed ball 24 in the body and co-operating notches 23 in the periphery of the rotor. Concentric ridges on the rotor co-operating with recesses in the body provide an arcing barrier. By removing clips 9 and a screw 29 the whole may be dismantled for access to the contacts. The switch may be enclosed in an earthed metal casing and used for direct on starting of a number of three-phase motors, Fig. 3 (not shown), or star-delta starting, Fig. 4 (not shown).
Patent GB-486708-A (GB)
Title: Improvements relating to vanity cases, powder-boxes, cases for medicinal remedies, and analogous portable cases
IPC: A45D33/00
Filed: 1937-08-31
Abstract: 486,708. Hinges for powder-boxes &c. COLIBRI LIGHTERS, Ltd. Aug. 31, 1937, No. 23850. Convention date, Oct. 10, 1936. [Class 65 (ii)] [Also in Group XVII] The lid of a vanity case, powder-box, container for medicaments, &c. is raised by means of a finger piece 9 which engages a link 7 to which the lid 2 is pivoted its front corners carrying pins 3 which engage grooves 4 so that the top of the lid is always presented to the front. In closing, the end of piece 9 snaps over the edge 10 of the lid to form a fastening. Additional links may be used to connect the lid and container. The top of the lid may constitute a mirror, or may bear instructions or other matter for display.
Patent GB-238642-A (GB)
Abstract: 238,642. Snow, C. S. H., and N.I.C.E., Ltd. June 4, 1924. Cranks.- The crank disc g of an intenal-combustion engine has jaws to receive the crank pin f; at the back of the rear jaw the disc is slit as as g<3> to allow the jaws to be drawn together easily.
Patent GB-427957-A (GB)
Title: Process of and apparatus for producing heat and cold
IPC: F25B9/00
Filed: 1933-08-28
Abstract: 427,957. Refrigerating. LEBRE, A. F., 74, Boulevard Exelmans, Paris. Aug. 28, 1933, No. 23885. [Class 29] Cold-air and like non-condensing machines and systems.-A process for producing heat and cold consists of an air or gas cycle comprising compression, heat exchange at high pressure during which heat is evolved, expansion, and heat exchange at low pressure during which heat is absorbed, the work done during expansion being utilized to effect cornpression by the interposition of a pressure - exchange air current or partition between the expanding air and the air under compression. The process may be carried out in apparatus comprising a rotor 1, Fig. 3, having a ring of chambers 2 formed by partitions 3 and enclosed by a closely-fitting casing 4. During the passage of the chambers through the expansion zone C-D, puffs of air, which form the pressure-exchange current shown by diagonal shading in Figs. 1 and 7, flow through the stationary connecting ducts 8 to the chambers passing through the compression zone AB. The air remaining in the chambers as they reach the end of the expansion zone is exhausted into the lowpressure heat - exchanger 7<1>, Fig. 1, during the passage of the chambers through the zone DA by warmed air from the heat-exchanger propelled by a fan 9<1>. Thus, the chambers reaching the compression zone AB are filled with relatively warm air at a low pressure. The air compressed in the chambers is exhausted into the heat-exchanger 7 during the passage of the chambers through the zone BC by cooled compressed air propelled by a fan 9. The speed of the fan 9 is adjusted so that the pressure-exchange current just reaches the end of each chamber as the chamber, filled with relatively cool compressed air, shown by the vertical shading in Figs. 1 and 7, is about to enter the expansion zone CD. The pressure difference between the air in the high and low pressure heat-exchangers is maintained by a compressor 13. To prevent leakage of air between any two adjacent chambers over the outer edges of the partition between them, the partitions are made hollow and, in the expansion zone, connected through branches on the connecting ducts with chambers at a lower pressure than that in either of the chambers separated by a partition so that air from both the chambers flows into the partition. In the compression zone, the partitions between adjacent chambers are supplied through other branches on the ducts 8 with air at a pressure greater than that in the chambers on either side of a partition so that air leaks from the outer edges of the partition into the adjacent chambers. In a modification, the changes of pressure produced in the heat - exchangers are compensated by a rotary compressor 13, Fig. 13, of the radially-sliding vane type mounted eccentrically within the rotor 1 and communicating through ports 16, 161 with the chambers and the hollow partitions respectively. The ducts 5, 6 connecting the zones BC, DA with the heat-exchangers are parabolic in form.
Patent GB-518083-A (GB)
Title: Improvements in polishing and like machines
IPC: B24B41/04
Filed: 1938-08-15
Abstract: 518,083. Polishing-machines. MORRIS, E. M. Aug. 15, 1938. No. 23956. [Class 60] Double-ended polishing-machines have the spindle divided into two parts which may be arranged coaxially end to end, may be inlined or may overlap, in the latter case the separate driving motors may be arranged side by side. The machine may be mounted on a stand 2 for use on a bench or the stand may be formed on a pedestal with storage for spare wheels. The housing is in three parts the centre part having a transverse partition with a webreinforced boss 6 having ball bearings for the spindle ends, separated by a washer 10 and held in place by end caps that also retain sleeves 25 that permit a larger size of bearing to be used, drive being through dogs 26. The outer parts of the housing support the motor stators and ball and collar bearings for the spindles. Other methods of dividing the housing and mounting the bearings are described in the Specification.
Patent GB-408140-A (GB)
Title: Process for sulphating the non-ferrous metals contained in ferruginous sulphide ores or sulphidic roasts
IPC: C22B1/02
Filed: 1933-08-29
Abstract: Non-ferrous metals contained in pyrites, mixed sulphide ores or sulphidic roasts are sulphated by charging the originating materials into a furnace wherein they are passed countercurrent to the gases and are raised to the sulphating temperature under conditions preventing oxidation of the non-ferrous metal sulphides, whereupon a combustible ferruginous contact substance in pulverulent form, e.g. flotation pyrites is blown in and burned.  Combustion of the pulverulent pyrites maintains the sulphating temperature, increases the sulphur dioxide concentration, and produces ferric oxide which acts catalytically in the oxidation of sulphur dioxide to sulphur trioxide.  The combustible contact substance may be replaced by pulverulent ferric oxide or roasted ore containing it, with simultaneous introduction of hot roasting gases, alone or in conjunction with a fuel, or a substance furnishing sulphur dioxide. A sulphating temperature of 450--600 DEG  C. is employed.  The furnace is preferably of the mechanical multi-stage or rotary type provided with air openings over its length and perimeter.  When raw ore is treated, the sulphur of the pyrites is burned off in the first part of the furnace.  When sulphidic roasts, e.g. Meggen pyrites (containing zinc sulphide), are treated, almost the whole of the furnace is devoted to the sulphating operation.
Patent GB-1267403-A (GB)
Title: A device for the instantaneous and selective detection of melted fuses in a group of rotating fuses
IPC: G01R31/34
Filed: 1969-05-12
Abstract: 1,267,403. Protective devices for dynamoelectric machines. SOC. DE CONSTRUCTIONS ELECTROMECANIQUES JEUMONT-SCHNEIDER. 12 May, 1969 [17 May, 1968], No. 24161/69. Heading H2A. Rotating fuses F 1  ... F n , e.g. for protecting rectifier elements on an alternator rotor, each have an indicator in the form of a mirror or spot of luminescent paint which is uncovered when a fuse blows and is sensed by a photo-cell C, each revolution of the rotor after passing a lamp A. Signals emitted by the cell C are received by a detector D which controls a gate Pa connected to an alarm circuit E and through relays R 1  ... R n  to further gates P 1  ... P n . The latter are opened sequentially by a switch M in synchronism with the passage of the fuses in front of the cell C so that when signals from the cell open gate Pa, the appropriate one of gates P 1  ... P n  will also be open resulting in operation of the associated relay to illuminate one of the signal lamps L 1  ... L n  indicating which fuse has blown. Reference has been directed by the Comptroller to Specification 864,639.
Patent GB-1046056-A (GB)
Title: Improvements in etched tantalum foil
IPC: C22C27/02
Filed: 1965-06-08
Abstract: A foil, for use in a capacitor, consists of high purity Ta having incorporated therein 35-300 ppm of extraneous Mo.
Patent GB-1456759-A (GB)
Title: Production of cross-linked open-celled foam of an olefin polymer
IPC: C08J9/06
Filed: 1974-05-31
Abstract: 1456759 Foamed, cross-linked, olefine polymer blends SUMITOMO CHEMICAL CO Ltd 31 May 1974 [31 May 1973] 24188/74 Heading C3C An open-celled, cross-linked foam is made by mixing a cross-linkable ethylene polymer and 20-60% by wt. of a non-cross-linkable, amorphous propylene polymer with a cross-linking agent and a foaming agent and heating to cross-link and foam the mixture. The ethylene polymer may be a low or high density polyethylene or an ethylene-vinyl acetate copolymer. The propylene polymer may be polypropylene or a propylene-ethylene copolymer. In the examples the ethylene and propylene polymers were blended with azodicarbonamide, zinc stearate, 1,3-di-t-butylperoxy-isopropylbenzene or dicumyl peroxide and optionally calcium carbonate, the composition was roll-milled and foamed in a mould under heat and pressure.
Patent GB-446618-A (GB)
Title: Circuit arrangement for the magnetic deflection of the cathode ray of a braun tube
IPC: H04N3/22
Filed: 1935-08-30
Abstract: 446,618. Television. LORENZ AKT.- GES., C., 1, Lorenzweg, Tempelhof, Berlin. Aug. 30, 1935, No. 24227. Convention date, Sept. 7, 1934. [Classes 39 (i) and 40 (iii)] The deflecting-coil A of a cathode-ray tube is in the directcurrent circuit of the anode of a valve V amplifying the deflecting-currents, and an auxiliary field displaces the picture on to the fluorescent screen. The current through the auxiliary coil H is adjusted by a potentiometer R.