baber/WOPTO huggingface dataset:
Patent GB-711607-A (GB)
Title: Improvements in or relating to methods and means for producing visible marks on a recording medium
Inventor: FOORD STANLEY GEORGE
IPC: B41M5/24
Filed: 1951-06-25
Abstract: 711,607. Recording-apparatus. STANDARD TELEPHONES & CABLES, Ltd. June 20, 1952 [June 25, 1951], No. 15016/51. Class 106 (4). [Also in Groups VIII and XVI] A method of producing marks on a recording medium which comprises providing a non-conductive and dry paper base impregnated with a substance which changes colour at any point at which an electric spark discharge is passed through the paper and passing the paper between electrodes disposed on opposite sides thereof between which electric sparks are caused to pass. Apparatus for carrying out the method may comprise a plurality of stationary electrodes and a movable electrode capable of being brought into close proximity to any one of the stationary electrodes. The recording medium may be formed by immersing ordinary non-conductive paper in a solution of sodium thiosulphate (say 25 grams in 250 c.c. of water) and, while wet, immersing it in a bath of lead nitrate (say 35 grams in 250 c.c. of water) so that lead thiosulphate or a complex lead-sodium thiosulphate is precipitated in the body of the paper. In order to keep the particles of lead thiosulphate finely divided in the paper a small quantity of gelatine may be added at either stage. A wetting agent such as sulphonated lauryl alcohol may also be added to both solutions to assist in penetration of the paper. The paper is dried for use. The paper may be treated with other colour-changing substances such as lead thiocyanate, or other materials having a plurality of allotropic forms such as mercuric sulphide, mercuric iodide or mercuric oxide. Instead of treating the finished paper it may be preferable to treat the paper pulp at an earlier stage in the manufacture of the paper. Specification 494,224 is referred to.
Patent GB-710042-A (GB)
Title: Improvements relating to electrically-operated remote-control systems
IPC: G05D3/12
Filed: 1952-06-16
Abstract: 710,042. Electric follow up systems. AKTIEBOLAGET BOFORS. June 16, 1952 [June 16, 1951], No. 15097/52. Class 40 (1). The error signal amplifying chain in a power operated positional control system includes a filter network in the D.C. portion of the amplifier designed to reduce the amplification of higher harmonics in the error signal and so restrict hunting of the system, means, responsive to the amplitude of the signal, being provided for cutting components of the filter in and out of circuit so that the filter functions for small error voltages only. As shown, a sight 1 and a gun 14 controlled thereby drive respective magslips 6, 8, fed from an A.C. source 7, the error signal being fed through an A.C. amplifier 15, phase detector 16, D.C. amplifier 17 and filter network 18 to an output stage 19 connected over a coupling device 22 to opposing coils 20, 23. The coils are balanced at coincidence and their currents are varied differentially by the error signal to rock an arm 27 actuating the servo-motor 13 in the follow-up sense. The coupling device 22 comprises a relay having two coils in series, respectively, with the coils 20, 23. When the error signal exceeds a predetermined value the differential currents in the relay windings cause the relay to operate a switch 35 to short circuit the capacitor 33 in the shunt 33, 34 of the filter, so that the filter functions only for small deviations from coincidence.
Patent GB-366836-A (GB)
Title: Improvements in or relating to wireless receiving apparatus
IPC: H03J1/16
Filed: 1931-05-22
Abstract: 366,836. Wireless receiving apparatus. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and PETERS, W. H., of General Electric Co., Stoke, Coventry. May 22, 1931, No. 15170. [Class 40 (v).] Two variable condensers, shown as formed by fixed plates 5 and plates of variable inclination 6 separated by insulation 7, are operated in succession by a shaft 4 bearing cams 17, suitably shaped, which bear upon parts 16 to alter the inclination of the plates 6 against the action of spring strips 11. One condenser may be connected in the aerial lead and the other in the plate circuit of a detector valve for reaction control. The same shaft 4 may be used to operate a volume control for use with a gramophone pick-up.
Patent GB-553639-A (GB)
Title: Improvements in or relating to optical objectives
IPC: G02B13/00
Filed: 1941-11-27
Abstract: 553,639. Optical objectives. TAYLOR, TAYLOR & HOBSON, Ltd., WARMISHAM, A., and WYNNE, C. G. Nov. 27, 1941, No. 15292. Drawings to Specification. [Class 97 (i)] In an objective corrected for spherical and chromatic aberrations, coma, astigmatism, field curvature and distortion, and comprising two compound divergent meniscus components, located between two simple convergent components and each having a divergent element cemented to a convergent element, both divergent elements are made of potassium bromide crystal. Dense barium crown glass may be used for the convergent element of one divergent component, and the other convergent element may be made of dense flint or dense barium flint glasses ; alternatively, all convergent elements may be made of dense barium flint glasses. The paraxial secondary spectrum may be reversed as compared with that for usual objectives, the average or the AbbÚ numbers for the four convergent elements may be not greater than 49, and the rear surface of the front convergent element may be convex to the front and have a radius lying between .85 and 1.6 times the equivalent focal length of the objective. Complete data are set out for three examples.
Patent GB-999402-A (GB)
Title: Phosphorus-containing esters
Inventor: SCHICKE HANS-GERD
IPC: C07F9/32
Filed: 1963-04-18
Abstract: The invention comprises phosphorus-containing esters of the general formula <FORM:0999402/C2/1> wherein R and R1 which may be the same or different are C1-C4 alkyl radicals, R2 and R3 which may be the same or different are C1-C4 alkyl or alkoxy radicals, X is an oxygen atom or an imino (-NH-) group, Y is an oxygen or sulphur atom and n is zero or one.  They may be obtained by reacting an alkyl sulphenic acid chloride R1SCI with an unsaturated ester or amide of the formula R-CO-X-(CH2)n-CH = CH2 to form a compound of the formula R.CO.X.(CH2)n.CHCI.CH2.SR1 and then reacting the latter with a salt of a phosphorus compound of the formula <FORM:0999402/C2/2> wherein Me is a salt-forming ion.  Each stage of the reaction is preferably carried out at elevated temperature, e.g. from 50 DEG  to 80 DEG  C., and in the presence of an inert organic solvent, e.g. acetonitrile, methyl ethyl ketone or methyl butyl ketone. Examples are given and the products have pesticidal properties (see Division A5). CH3.CO.NH.CH2.CH(CI)CH2.S.C2H5 is obtained by reacting acetic acid-N-allylamide with C2H5SCI in CCI4; CH3COOCH(CI)CH2SC2H5 is obtained by reacting vinyl acetate with C2H5SCI in CCI4, and CH3COOCH2CH(CI)CH2SC2 H5 is obtained in a similar manner from allyl acetate and C2H5SCI.  Specifications 922,781 and 940,537 are referred toALSO:A pesticidal composition comprises a solid or liquid diluent or carrier and a phosphorus compound of the formula <FORM:0999402/A5-A6/1> wherein R and R1 which may be the same or different are C1-C4 alkyl radicals, R2 and R3 which may be the same or different are C1-C4 alkyl or alkoxy radicals, X is an O atom or an imino (-NH-) group, Y is an oxygen or sulphur atom and n is zero or one (see Division C2). Specified carriers or diluents are talc, chalk, bentonite, clay, water (if necessary with an emulsifier), alcohols, ketones, dimethylformamide and liquid hydrocarbons.  Known insecticides and/or fertilizers may also be present.  Specifications 922,781 and 940,537 are referred to.
Patent GB-1048440-A (GB)
Title: Method and means for controlling the temperature of an electron beam tube
Inventor: HEIL OSKAR
IPC: H03B9/04
Filed: 1964-04-14
Abstract: 1,048,440. Automatic temperature control. VARIAN ASSOCIATES. April 14, 1964, No. 15383/64. Heading G3R. [Also in Division H1] In an electron beam tube in which a radio frequency is determined by a section of the tube interacting with the beam, the beam is automatically deflected in dependence on the temperature of the section so as to vary the heating of the section and thereby maintain its temperature constant. In Fig. 1 (not shown), a floating drift tube klystron oscillator comprises an electron gun section 2, a radiofrequency section 3, and a collector section 4 united to form a unit which is evacuated. The electron gun section comprises an anode 8, a focussing electrode 9, and a cathode 12 insulated from each other and connected by leads (not shown) to conductors 21. Cathode 12 and its heating coil 16 are replaceable by separating welded sealing rings 23, 24 and removing a cap 22 of insulating-material. The radio frequency section comprises a resonant cavity 29 in which a drift tube 33 is located by vibrationless temperature-compensating spokes 34, and an output cavity 37 in which is located an output coupling loop 41. A metallic shell 42 of low heat conductivity couples the radio-frequency section to the collector section. To maintain the temperature of the radio-frequency section constant the output of a thermocouple associated with this section controls, through an amplifier 54, the electrostatic potential of an electrode 56 which varies the deflection of the electron beam to correct the temperature by altering the amount of the beam impinging on wall 38. Modifications are described in which deflection of the beam is electromagnetic instead of electrostatic, the electromagnet being either to one side of, or within, the path of the beam. Metallic shell 42 may be replaced by a metallised insulated member or a ceramic tube having metallised ends. In the latter case temperature is corrected by an electrostatic potential applied to collector 4 which is then insulated from the radiofrequency section. Temperature variations may alternatively be detected by the frequency variations they produce.
Patent GB-974581-A (GB)
Title: Improvements in or relating to automatic cigarette dispensers
IPC: A24F15/10
Filed: 1963-04-19
Abstract: 974,581. Cigarette dispensers. H.-G. ROTT, [trading as SCHOELLER & CO. ELEKTROTECHNISCHE FABRIK]. April 19, 1963 [May 11, 1962], No. 15449/63. Addition to 893,194. Heading B8P. The automatic cigarette dispenser of the parent Specification has its feed trough 28 and the claw, 4 constructed as a single removable component.
Patent GB-1376356-A (GB)
Title: Apparatus for producing fibrous mat
IPC: D01G25/00
Filed: 1972-04-04
Abstract: 1376356 Fibre opening and lap forming HONSHU PAPER CO Ltd 4 April 1972 [10 Sept 1971] 15451/72 Heading D1N In a web forming apparatus fibre flock is delivered via a duct 10 to a foraminous cylinder 102 containing rotary beater blades 101. A casing 113 surrounds the cylinder 102 and is supplied with air through variable valves 116 and slots 115 to carry opened fibres downwards onto a foraminous conveyor 119. Below conveyor 119 is a main suction chamber 120 and an auxiliary suction chamber 124. Main suction chamber 120 is divided across its width by partitions 121, each duct so formed having a damper 123. The rotary beater comprises blades 101 having tapered arms on an annular core, Fig. 4 (not shown). The blades are mounted at random angles on a shaft 110. Suitable values of the distance h between the cylinder 102 and conveyor 119 and the pitch of the holes in the cylinder are given.
Patent GB-238338-A (GB)
Title: Improvements in radio receivers
IPC: H03J5/24
Filed: 1924-06-26
Abstract: 238,338. Lea, N., and Radio Communication Co., Ltd. June 26, 1924. Thermionic amplifiers and detectors; tuning apparatus, control of.- A number of separate tuned circuits are associated with an aerial and a common, detector or amplifier, so that reception on different wave lengths can be secured at will by means of a change-over switch. As shown in Fig. 1, one or other of the tuned circuits 1, 3 and 2, 4 is inserted in the aerial circuit by a switch arm 14, a second arm 15 changing the corresponding reaction coil 5 or 6. In Fig. 3 the change-over is effected automatically by a remote control switch 29 in the filament-supply circuit. This switch energizes a relay 38 controlling the switch arms 32, 33, and simultaneously energizes a second relay 27 to light up the valves in an amplifier unit 26 in the manner described in Specification 216,651. When the brush arm of the rheostat 28 is in the off position, the current supply to both relays 27, 38 and to the filament 9 is broken.
Patent GB-702526-A (GB)
Title: Improvements in or relating to mounts for seed crystals for use in crystal-growing apparatus
IPC: C30B7/00
Filed: 1950-06-21
Abstract: A seed crystal 1 is mounted in a crystallizing apparatus by being clamped between a plate 2 and a rubber covered rod 8.  The rod is bent to pass through a hole 3 in the plate and is held in position by a clamping screw 7 which may be mounted in a threaded hole in the plate 2 or in an additional member secured beneath the plate 2.  The rod 8 may engage a surface of the seed or a hole bored in the seed. A number of mounts may be assembled on a rotatable support, (Fig 6). A large plate 2 of polymethylmethacrylate is supported by radial arms 15 mounted in a boss 20 secured to a vertical rotatable shaft 21. The bent parts of the clamping rods 8 (not shown) pass through the plate 2 and the arms 15 and are secured by clamping screws in threaded bores in the arms 15.  A number of plates 2 &c. may be mounted one above the other on the shaft 21, the <PICT:0702526/III/1> whole being inserted in the gearing tank of a crystallizer and oscillated about the axis of the shaft 21.
Patent GB-121980-A (GB)
Title: A Jet Propeller for Flying Machines and the like.
Inventor: LEECH SAMUEL
IPC: F02K7/00
Filed: 1917-10-26
Abstract: 121,980. Leech, S. Oct. 26, 1917. Propelling.-A jet propeller for aircraft and vehicles comprises means for producing continuous high-velocity jets of combustion products through conduits n past a series of ejector vanes o so as to produce a partial vacuum within the apparatus and cause air to flow in from outside against deflecting vanes p, thereby producing a propulsive reaction towards the left of the device shown in Fig. 1. The apparatus also comprises a receiving chamber a, vapour chamber b, a combined vapour engine and petrol pump d, a vaporizing- coil f, a vapour jet h with a regulating-valve g, air-induction vanes k, and combustionchamber e. The apparatus is started by introducing petrol into the chamber a through a non-return valve and applying external heat. The vapour passes into the chamber b and exerts a pressure on the main petrol supply through a reducing-valve e. Petrol is forced through a pipe r, the pump-cylinder d<13> of the device d, and a pipe r<3> to the vaporizing-coil f. A valve c, previously closed, is then moved to put the reservoir b into communication with the coil f , through a pipe r<1>, and through a pipe r<2> with the jet h and the vapour-exhaust end d<4> of the device d so as to equalize the pressures. The valve g is then opened, and a jet of vapour mixed with air induced through the vanes k enters the combustion-chamber l and is ignited by a sparking-plug m or spongy platinum, the combustion products issuing from the conduits n. When the combustion chamber and surrounding coil f have reached the necessary temperature, the valve c is turned to put the chamber b and pipe r<1> into communication with the vapour-inlet end d<5> of the device d. The piston d', Fig. 2, of the device d is caused to reciprocate under the action of the petrol vapour by means of a sleeve valve d' which is moved against one or other of its stops d<6>, d' every time compression springs d<3> are moved past their dead centres by the travel of the piston. An enlarged portion of the piston working in the cylinder d" pumps petrol through the inlet valves d', d' and delivers it through a sliding valve d<10> and non-return valve d<11> to the pipe r<3> and vaporizing-coil f. The exhaust vapour is led to the jet h through the end d<4> and pipe r<2>, and the action continues until the petrol is exhausted or the valve g closed. A guide d<12> prevents rotation of the sleeve-valve d<2>.
Patent GB-590541-A (GB)
Title: Improvements in sound-absorbent structures
IPC: E04B1/99
Filed: 1944-04-04
Abstract: 590,541. Sound insulation. KING, A. J., SCOTT, R. A., MAGUIRE, C. R., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. April 4, 1944, No. 15624/45. Divided out of 6286/44. [Class 64 (ii)] [Also in Group XXXVIII] A device for absorbing sound waves of a predetermined frequency and applied to a backing member, such as the wall of a ventilating shaft, comprises an air-tight enclosure C formed by a vibratory sheet B spaced from the wall A by spacers D and the air pressure in the enclosure is reduced to a value such that at the predetermined frequency the stiffness reactance of the enclosed air at the inner surface of the sheet B is approximately equal to the mass reactance of the sheet. The enclosure may contain a layer of porous material and the acoustic resistance of the enclosure as a whole is arranged to be of the same order of magnitude as the characteristic acoustic impedance of air or other medium to which the device is exposed. Intermediate spacers D may have apertures F to facilitate the withdrawal of air from the enclosure. Specification 590,540, [Group XXVII], is referred to.
Patent GB-1067310-A (GB)
Title: Improvements in or relating to the destaining of media following electrophoresis and subsequent staining
Inventor: STACEY JOHN FREDERICK
IPC: G01N27/447
Filed: 1966-04-07
Abstract: <PICT:1067310/C6-C7/1> Apparatus for destaining media from which excess stain is to be removed after an electrophoresis run includes an enclosure 20 (shown upright in a tank 1 in Fig. 2) for the stained media, e.g. gel columns 28 of agar or polyacrylamide, formed between two spaced porous plastics sheets 23, 24, e.g. each mounted between a border frame 26, 25 and a central frame (21), adapted, e.g. by wedging the enclosure between fixed U-shaped frames 17, 18 using wedges 27 and a resilient sealing strip 29, to press with their inside faces against opposite sides of the media, and to contact with their outside faces a buffer solution, e.g. of 10% acetic acid, contained in each of two chambers, each associated with an electrode 10, 11 and separated from one another by the enclosure. The application of D.C. voltage between the electrodes produces migration of the unbound stain through one of the sheets to the buffer solution in one of the chambers.  The apparatus may include cooling compartments 4, 5 (Fig. 2) separated from respective chambers by partitions 8, 9 to cool the buffer solution during destaining.  All non-porous parts, particularly the enclosure wall, are made preferably of transparent plastics material e.g. methylmethacrylate. The two electrodes 10, 11 may be carbon rods extending parallel to one another and secured to the tank end-walls by grommets 13 (Fig. 2). As shown in Fig. 5, the stained media e.g. gel slab 73 may be placed between an inclined lower porous plastics sheet 50 and upper dialysis membrane 74, similarly mounted between removable frames 48, 66, 80, serving to separate the enclosure from lower and upper chambers 40, 39, each provided with a valve-controlled outlet (60) for releasing buffer solution and a slot-like filling opening 46, 83, and containing platinum wire electrodes 64, 91 each looped to and fro between parallel insulating rods 61, 62 and 88, 89.  The platinum wires may be replaced by wire meshes or graphite electrodes.
Patent GB-869794-A (GB)
Title: Methine dyestuffs
IPC: C09B23/10
Filed: 1958-05-16
Abstract: 869,794. Methine dyes; dyeing fibres. FARBENFABRIKEN BAYER A.G. May 16, 1958 [May 23, 1957], No. 15780/58. Classes 2(4) and 15(2). [Also in Group IV(b)] Methine dyes of the general formula:- wherein R, R 3 , R 4  and R 5  are alkyl groups, R 1  is H or an alkyl group, R 2  is H or an alkyl or aryl group, X is an anion, and any of the benzene rings may carry further substituents, are prepared by reacting a 7-alkyl-indole-3-aldehyde with a 1; 3; 3-trialkyl-2-methylene-indoline in an acid medium, or by reacting a 7-alkylindole with a 1; 3; 3-trialkyl-indoline-2-methylene-#-aldehyde in an acid medium. Alternatively, a 7-alkylindole and a 1; 3; 3-trialkyl-2-methylene-indoline may be reacted together in the presence of a dialkyl, diaryl or alkylaryl formamide and a halide of phosphorus or phosphoric acid. The products are useful for dyeing cotton, leather, acetate rayon, polyamide and polyurethane fibres, and articles made from acrylonitrile. An example of dyeing polyacrylonitrile fibres from an acetic acid bath is given. Reference is made to dyes wherein the benzene rings of the indole nuclei may contain methyl, ethyl, methoxy, ethoxy, #- hydroxyethyl, chloro, nitro, carboxylic methyl or ethyl esters, phenacyl, acetylamino, sulphamido or cyano substituents or may have a fused-on benzene ring.
Patent GB-476248-A (GB)
Title: Improved process of cooling bread and the like
IPC: A21D15/02
Filed: 1936-06-05
Abstract: 476,248. Cooling bread. DUVAL, M. H. June 5, 1936, No. 15803. Convention date, June 17, 1935. [Class 29] In a process for cooling bread, freshly baked bread is subjected to a cooling period in order to soften the crust by distribution of moisture from the crumb, and then further cooled under a vacuum which is adjusted so that the boiling point of water under this pressure does not vary sufficiently from the temperature of the crust to cause the latter to be substantially hardened. The first cooling of the bread may be effected under atmospheric conditions or by blowing air over the bread, or by exposure to conditioned air. This step in the process stops when the temperature of the crust is in the neighbourhood of 135‹ F. The bread is then cooled by a vacuum in which water would not boil at temperatures substantially below 135‹ F. If the temperature of the crust after the preliminary cooling is higher than the final temperature desired it will be necessary to increase the vacuum for the final stage of the vacuum cooling. Only a limited amount of moisture will, however, be thus withdrawn from the crust and it will not be substantially hardened.
Patent GB-333915-A (GB)
Title: Improvements in or relating to multiple roll ironing machines
IPC: D06F65/10
Filed: 1929-05-22
Abstract: 333,915. British-American Laundry Machinery Co., Ltd., and Russell, E. S. May 22, 1929. Ironing-machines with rollers rotating against concave surfaces.-On a multi-roller machine having tapes for feeding from roller to roller particularly as described in Specification 324,731, each roller 1, 2, 3 is provided with an independent set 6, 7, 8, respectively of tapes which are passed over guides 12 at the front or rear of the machine or, as shown, some guides may be arranged at the front and others at the rear. The guides comprise flanged wheels carried on downwardly depending arms 12 pivoted to transverse rods 14 around which the tapes also pass and which are carried by uprights 15 secured to the frame of the machine. The weight of the guides serves to maintain the tension in the tapes. The tapes are returned by guide rollers 9, 10, 11 between the ironing rollers. Stripping devices for the final roller 4 comprise a number of metal shoes or plates 17 spaced apart longitudinally of the roller and each supported by a pair of flexible members 18 secured to a crossbar 19 on the uprights 15 at the rear of the machine. The shoes are so connected to the flexible members that they tend to swing counterclockwise to engage the periphery of the roller. Alternatively the stripping devices may comprise cast-iron or other plates having a sharp stripping edge and an upper heel portion, both the edge and the heel engaging the roller, the plates being supported by chains which are preferably adjustable.