baber/WOPTO huggingface dataset:
Patent GB-978103-A (GB)
Title: Preparation of zeolites
Filed: 1963-05-24
Abstract: Zeolite Z-14-Na, of approximate gross composition Na2O.Al2O3.2.5 SiO2.nH2O, where n is a small number, and pore size about 13 <\>A, is prepared by (A) ageing a mixture of calcined clay, aqueous sodium hydroxide and hydrous silica, the temperature of the mixture during ageing being maintained at between 20 DEG  and 45 DEG  C. and being gradually increased by at least 5 DEG  C. over a period of 1-5 days, and (B) maintaining the aged mixture at above 45 DEG  C. until the crystalline zeolite separates.  The mixture, made up at 20-30 DEG C., initially contains by weight 1.3-2.1% SiO2, 5.5-8.5% Na2O and 4-8% calcined clay, and has for each part by weight of calcined clay 0.9-2 parts Na2O, 0.2-0.4 parts SiO2 and 9-20 parts water.  The ratio of H2O to Na2O is 9: 1 to 18 : 1.  The clay, e.g. kaolin or halloysite is calcined at 500-800 DEG  C. for 2-18 hours. Step B is preferably carried out by maintaining the aged mixture at 90-110 DEG C. for 6-12 hours, e.g. by boiling under reflux.  The crystalline zeolite may be recovered by filtration, decantation or centrifuging, and washed with water, dried at 110 DEG C. or activated at 350 DEG C. Z-14-Na may be converted to calcium zeolite Z-14-Ca or ammonium zeolite or other alkali metal or alkaline earth metal forms by standard base-exchange techniques.
Patent GB-635590-A (GB)
Title: Radio receiving systems
IPC: H04L1/06
Filed: 1947-08-01
Abstract: 635,590. Radio receiving systems. WESTERN ELECTRIC CO., Inc. Aug. 1, 1947, No. 20989. Convention date, May 23, 1944. [Class 40 (v)] [Also in Group XL (b)] In a radio receiving system more particularly a telegraph system which employs different frequencies for marking and spacing signals, two separate signal receiving paths are arranged so that the paths are cut off on the reception of excessive noise or the gain of the path having the greater noise content is decreased. Fig. 1 shows a telegraph receiver wherein incoming signals are passed through a current limiter CL to two filters 2, 3 which separate the marking and spacing signals. The separated signals are detected by full-wave rectifiers 6, 11 and are impressed on the grids of the " marking " and " spacing " amplifiers 7, 12 connected to corresponding windings of the polarized relays 8. The voltages of the mid-point 17 of resistances 13, 14 bridged across the grids of valves 7, 12 are a measure of the averages of noise currents in the marking and spacing channels so that if during signal reception on a channel the noise level on the other channel is excessive, the voltage of the point 17 increases to operate, through a valve 18, a polarized relay 19 and open the screen-grid circuits and cut-off the valves 7, 12. The arrangement shown in Fig. 1 may be modified for application to a dual diversity receiving system (Fig. 2, not shown), so that the gain of the channels having the poorer signal-to-noise ratio may be decreased while the gain of the other channels is increased. In this arrangement, the mid-points 17 of the pairs of channels are connected to pairs of valves and in the presence of excess noise in the channel, one of these valves reduces the screen voltages on its associated valves 7, 12 to reduce the gain and the other valve brings about an increased gain in the other pair of channels with the result that the combined current supplied to the receiving relay 8 is maintained constant. A system of diversity reception is also described (Fig. 3, not shown), in which the noise-detecting and cut-off circuits shown in Fig. 1 are combined with circuits for compensating selective fading. The output of each amplifier of one channel is supplied through a resistance in series with the screen grid of the corresponding amplifier in the other channel. So that alteration of the signal strength in one channel causes a change in the gain of that channel and a corresponding compensating gain in the other channel, so as to produce constant current operation of the telegraph receiving relay whether both or one only of the channels is receiving signals.
Patent GB-221930-A (GB)
Title: Improvements in or relating to pipes for smoking tobacco
IPC: A24F5/00
Filed: 1923-08-18
Abstract: 221,930. King, T. J. Aug. 18, 1923. Tobacco pipes. - The bottom of the bowl is bored and rebated to receive a removable plug c having a dished upper surface c<1> and a groove c<2> which communicates with the bore d of the stem and, on the opposite side, by a sloping passage c' with the surface c<1>, the groove thus acting as a trap for the nicotine and moisture. A curved or eccentric undercut groove e<1> is formed in the pipe and co-operates with a cap e, which may be formed of the same mat'erial as the pipe. A screw-threaded metal sleeve may be fixed to thebottom of the member c to screw into a thread in the bore of the bowl. In a modification, Figs. 12 and 13, the surface c<1> communicates with t'he groove by a radial slot g and the plug is surrounded by a screw-threaded member f of aluminium or other metal, a segmental slot f<3> allowing communication between the stem bore and the groove c<2>. A milled flange c‹ may beprovided.
Patent GB-1422320-A (GB)
Title: Optical lens systems
IPC: G02B25/00
Filed: 1973-09-03
Abstract: 1422320 Microscope eye-piece AMERICAN OPTICAL CORP 3 Sept 1973 [5 Sept 1972] 21003/75 Divided out of 1421806 Heading G2J An eye-piece having a magnification of 15.5X, a real field of view diameter of 15.5 mm and an apparent field of view of 51.4 degrees has optical elements as shown. Optical data are given.
Patent GB-382308-A (GB)
Title: Improvements in or relating to combined sound record and picture films
Filed: 1931-07-23
Abstract: 382,308. Combined sound and picture films. KUPFER, R., 27, Hardenbergstrasse, Charlottenburg, Berlin. July 23, 1931, No. 21065. Convention date, Aug. 1, 1930. Drawings to Specification. [Class 40 (ii).] A metal film bearing a sound record and pictures is arranged with the sound recorded on that portion of the film which carries the corresponding picture. The sounds may be recorded photographically, or magnetically, or by etching, engraving or the like. The sound record may be disposed either alongside the picture or on the opposite side of the film to the picture so as to employ any part of the width of the film. The pictures are adapted to be reproduced with the film moving continuously.
Patent GB-572214-A (GB)
Title: Improvements in or relating to valve circuits for amplifying alternating currents orvoltages
IPC: H03F3/189
Filed: 1943-12-16
Abstract: 572,214. Valve amplifying circuits. CINEMA-TELEVISION, Ltd., and WEST, S. S. Dec. 16,1943, No. 21110. [Class 40 (v)] A selective amplifier comprises two valves, each having at least an anode, a cathode, and a control electrode, a frequency-determining circuit connected between the anode of one of said valves and the control electrode of the other valve, and a feedback circuit comprising a'common cathode impedance for said valves. In the arrangement shown in Fig. 1 the valve 1 to which the input is applied is connected to valve 2 by a network 3, 4, 5, 6, the values of which are chosen so that at the frequency of operation the signal at the grid of valve 2 is 180 degrees out of phase with the signal at the grid of valve 1. With the common cathode resistance, this gives the conditions for positive feedback, the magnitude of which is varied by varying resistance 7. In a modification, Fig. 2 (not shown), the resistance 3 and capacity 4 are in series between the anode of 1 and grid of 2 and resistance 6 and capacity 5 are in parallel between the grid of 2 and H.T.-. The resistance 7 is of a magnitude to give negative feedback and a variable tapping is adjusted to give the right degree of negative feedback to prevent oscillation. The RC networks may be replaced by LC networks.
Patent GB-431677-A (GB)
Title: Improvements in or relating to the cooling of oil in lubricating systems of internal combustion engines
IPC: F01M5/00
Filed: 1934-03-23
Abstract: 431,677. Cooling lubricant. CORTEEL, D. A. C., 67, Reighton Road, Clapton, SMEDLEY, G. D., 78, Nelson Road, Hornsey, and RHODES, R. H. W., 18, Fairholt Road, Stoke Newington. all in London. March 23, 1934, No. 21124/33. [Class 12 (iii)] Lubricating oil in the sump 7 of an internalcombustion engine is cooled by finned or plain tubes 8 through which air is drawn or forced by a fan 14 driven from the engine shaft through belt or toothed gearing. Specification 335,446*, [Class 12 (iii)], is referred to.
Patent GB-446146-A (GB)
Title: Cleaning, polishing and reviving compositions especially suitable for coachwork coated with cellulose preparations
IPC: C11D7/60
Filed: 1935-07-25
Abstract: Cleaning, polishing, and reviving compositions, especially suited for treating coachwork coated with cellulose preparations, comprise a cleansing agent, an abrasive, a solvent, a lubricant, and ethyl lactate and butyl acetate as a plasticizer.  Example: A mixture of water 48,9 lb., sulphuric acid 2,6 lb., methylated spirit 7,8 lb., glycerol 9,4 lb., ethyl lactate 1,9 lb., butyl acetate 3,4 lb., Neuberg chalk 17,4 lb., burnt Turkey umber 1,7 lb., B.P. petroleum polishers oil 1,9 lb., and white spirit 5,0 lb., is used.  3,9 lb. of acetic acid may replace the sulphuric, methyl or ethyl alcohol the methylated spirit, paraffin oil the white spirit, and the abrasive may include Florida or diatomaceous earth.
Patent GB-573917-A (GB)
Title: Improvements in or relating to photographic materials
IPC: G03C1/93
Filed: 1943-12-17
Abstract: Photographic film comprises a support which is itself, or is surfaced with, a highly esterified alkyl methacrylate polymer, i.e. one containing few free carboxyl groups, one or more sub-strata of or containing alkyl methacrylate polymer of a lower degree of esterification coated thereon, and a gelatine layer coated on said sub-stratum or upon the outermost of said sub-strata.  The support may be of the fully esterified methyl methacrylate polymer or a surface layer of this material on a base of paper, cellulose or its derivatives or a hydrophobic colloid such as plasticised polyvinyl chloride or polystyrene, or on a double base of cellulose acetate and cellulose nitrate or polyethylene and polystyrene.  Gelatin is preferably included in the sub-stratum.  In an example, a support of paper is coated on both surfaces with a solution of "Diakon" (Registered Trade Mark), toluene, and ethyl alcohol, the coatings allowed to dry, and a sub-stratum applied of a solution of gelatine, salicyclic acid, methyl alcohol, acetone, formaldehyde and methyl methacrylate polymer (20 per cent hydrolysed).  In a further example, a layer of methyl methacrylate polymer (20 per cent hydrolysed) in methyl ethyl ketone is applied to the fully esterified methyl methacrylate layer before the application of the mixed gelatin and hydrolysed polymer substratum.  Propyl, butyl or other higher methacrylate polymers may be used.  Methyl methacrylate polymer containing free carboxyl groups may be prepared by the co-polymerization of methyl methacrylate and methacrylic acid in a common solvent, e.g. methyl alcohol and benzene, in the presence of a catalyst such as benzoyl peroxide. Alternatively, a fully esterified methyl methacrylate polymer is partially hydrolysed by dissolving in cold aqueous sulphuric acid and heating.  The product is precipitated in water, washed in water and ethyl alcohol, redissolved in acetone, reprecipitated and dried at 100 DEG  C.  Specification 513,238, [Group XX], is referred to.
Patent GB-211880-A (GB)
Abstract: 211,880. Cassan, J. H. F. Feb. 23, 1923, [Convention date]. Gas analysis.-The percentage of water vapour, or carbon dioxide &c. in a gaseous mixture is measured by drawing t h e mixture through a standard orifice at a known temperature a n d pressure and measuring the rate of flow. A tube 4 closed at its inner end contains coaxially a smaller tube 1 at the inner end of which is a diaphragm 2 with a small central orifice. The outer end of the tube 1 is connected by a flexible tube 3 to a tube 9 passing into a Mariotte's vessel 7. The vessel being filled with water &c. and the valve 15 at its lower end then opened, the time taken by the water to descend from the level 11 to the level 10 is measured and from this the composition of the mixture is deduced. The measurement of the time may be made automatic by providing pivoted floats within the vessel at the upper and lower levels, the floats being provided with arms controlling electric circuits.
Patent GB-250095-A (GB)
Title: Improvements relating to the valves and valve gear of internal combustion engines
IPC: F01L1/28
Filed: 1925-08-26
Abstract: 250,095. Tosi, E. Aug. 26, 1925. Valves; valve gear.-In a Diesel engine having a single valve V controlling both air-admission and exhaust, these two functions are further separately controlled by coaxial beat valves V<a> and V<8> respectively closed in opposite directions by springs m<1> and m and opened by means of a single lever L, which is provided with a roller r engaging a grooved cam S oscillated by an eccentric E on the main cam shaft. In modifications. the valves are closed by a single spring arranged around the stem of the valve V<8> and within a hollow cylindrical portion formed on the stem of the valve V<a>, and the lever L is actuated directly by grooved or positive cam gear on the main cam shaft.
Patent GB-684357-A (GB)
Title: Autoclave
Inventor: KELLIE ROBERT WALLACE
IPC: B01J3/04
Filed: 1950-08-30
Abstract: 684,357. Digesters. KELLlE & SON Ltd., R. Aug. 29, 1951 [Aug. 30, 1950], No. 21407/50. Class 64 (i) An autoclave 1 has a lid (not shown), at least one closable outlet 3 at the bottom and heater pipes 6 carrying an agitator 9 and interconnecting two distributer heads 5 which present trunnions 7 engaged with bearings 4 carried by the autoclave wall, the trunnions receiving pipe connections 10. The agitator or stirring plate 9, secured to rods 8, and the heater 5, 6, through which steam is passed, are rotated by means of sprockets 13. A secondary, quickrelease lid is included in the main lid. There may be an additional outlet in the conical bottom part connected to a pump having its delivery part connected by a pipe to the top of the autoclave. Compressed air is used to expel the autoclave contents after heating.
Patent GB-276332-A (GB)
Title: Improvements in or relating to four-stroke cycle internal-combustion engines
IPC: F02B1/00
Filed: 1927-08-15
Abstract: 276,332. Violet, M. A. Aug. 17. 1926, [Convention date]. Four - stroke - cycle engines; cylinders, ports of.-To maintain a constant compression of the charge, exhaust gases are drawn into the cylinder at the end of the suction stroke, if a full charge of mixture has not been taken into the cylinder. In addition to'the normal exhaust outlet 11 a terminal exhaust port 14 is provided, which is connected to the main exhaust pipe 12 through an expansion reservoir 6. A cock 5 is placed in the connection to the reservoir and is controlled either with the main engine throttle 4 or independently. At starting or slow running the cock is closed; as the main throttle opens the cock is opened, so that if a light charge of mixture is drawn into the cylinder, the depression existing at the end of the suction stroke will cause the return of some exhaust gases and ensure complete filling of the cylinder. For aeronautical purposes a valve 13 is placed in the pipe from the reservoir; by closing this valve exhaust gases at pressure are held in the reservoir, which exhaust is returned on the next suction stroke to bring the compression pressure to normal. The Specification as open to inspection under Sect. 91 (3) (a) also states that the main exhaust valve may be reopened at the end of the suction stroke to allow return of exhaust gases for the same purpose, the additional terminal exhaust port being dispensed with; or a sleeve valve control may be used. This subject-matter does not appear in the Specification as accepted.
Patent GB-1315003-A (GB)
Title: Gas mixture rectification
IPC: F25J3/04
Filed: 1970-05-04
Abstract: 1315003 Separation of argon from air L'AIR LIQUIDE SOC ANON POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 4 May 1970 [5 May 1969] 21424/70 Heading F4P In a three component gas mixture rectification process for the production of a component present in small proportion and of boiling point intermediate those of the remaining two components, e.g. argon, oxygen and nitrogen respectively a gaseous fraction is withdrawn at an intermediate level 8 from the low pressure stage 2 of a double column 1, 2 passed to an auxiliary rectification column 4 where it is in part condensed by vaporization in a condenser 7 of a liquid fraction withdrawn from the main column and the condensate is returned at 9 to said intermediate level. As shown cooling of condenser 7 is effected by a liquid oxygen fraction withdrawn from the: column 2 through a line 14 and the so-vaporized oxygen is withdrawn as product at 114. Reflux for column 4 is provided by a condenser 6 cooled by crude liquid oxygen, and product argon-rid gas is withdrawn at 11. In a modification condenser (7), Fig. 2 (not shown), is cooled by liquid nitrogen withdrawn from the top of column 1 thereby obtaining product gaseous nitrogen; product oxygen being withdrawn from column (2) through line (14).
Patent GB-1034070-A (GB)
Title: Improvements in and relating to suction heads for lifting and/or conveying articles
Inventor: VISSERS HERBERT
IPC: B66C1/02
Filed: 1965-05-20
Abstract: 1,034,070. Suction lifting-heads. LANDBOUWWERKTUIGEN - EN MACHINEFABRIEK H. VISSERS N.V. May 20, 1965, No. 21459/65. Heading B8H. When compressed air is admitted through a conduit 11 to a cylinder 2 a piston 4 is lifted and with it a piston 3. The latter produces suction in a lower cylinder 1. Holes 13, 14 connect the spaces above the pistons with the atmosphere. The air under pressure is exhausted from the cylinder 2 through a valve 12.
Patent GB-314245-A (GB)
Title: Improvements in or relating to vices, cramps, and the like
IPC: B25B1/12
Filed: 1928-07-25
Abstract: 314,245. Underwood, E. W., and Carpenter, J. July 25, 1928. Cramps.-A cramp has one of its jaws slidably guided on the cramp bar and locked in adjusted position by a pair of spring pressed pivoted bell crank levers, the heads of which engage when the operative position between a guide lug on the underside of the jaw and rack teeth on the side edges of the bar, thereby relieving the pivots of the locking members of strain. The cramp bar a of T-section is detachably mounted on trestle supports b connected by a tie c, and the flanges are provided with looking teeth d having inclined sides and locking faces at right angles to the length of the bar. The jaw e has a depending lug f slotted to engage the flanges of the bar and gapped to engage the web. The pawl members h of bell crank form are mounted on studs on the underface of the jaw, and when in locking position under influance of springs k the transversa links of the pawl members bear against the rear edge of the lug f. The pawl members are released by finger pins l extending upwards through slots in the jaw. The other jaw n is adjustable by a screw r supported in bearings t and held in engagement with threads q in a semi- - cylindrical extension p of the jaw n by a semicylindrical cover plate r bolted to a block u secured to the cramp bar a.
Patent GB-199284-A (GB)
Title: Improvements in power shut-off mechanism for electric motors
IPC: H02P3/06
Filed: 1922-08-09
Abstract: 199,284. Pedersen, J. T. Aug. 9, 1922. Systems controlling travel for a fixed distance. -An electric motor is started by turning a disc partly round, and is stopped by causing the motor, when it has run a determined distance, to carry the disc round through the remainder of a revolution. A movable spring contact 51 engages a notch 48 in a pegged disc 45, which when turned by a separate button 59 displaces the spring to the dotted line position so as to turn on current to the motor. A train of reduction gearing from the motor shaft 24 turns the disc slowly forward until the spring re-enters the notch and turns off the current. The motor may drive a pump in conjunction with a coffee making apparatus.
Patent GB-220810-A (GB)
Title: Improvements in electric warning horns
IPC: G10K9/10
Filed: 1923-08-28
Abstract: 220,810. Harris & Sheldon, Ltd., and Sellers, T. E. Aug. 28, 1923. Diaphragm horns. - In an electric horn in which the electromagnet comprises inner and outer pole members, the outer member is U- shaped and is formed with integral or separatelyattached brackets on which are carried one or both of the interrupter contacts. In the example shown, the inner circular member 1 and the outer U-shaped member 2 are secured together and to the diaphragm-carrying ring 7 by rivets 10 and by expanding the end 5 of the member 1. A circular armature 13 carrying the striker 16 is controlled by a coiled spring 12 housed in an annular channel in the member 1. The ends of the member 1 are bent outwardly as shown, to form brackets 17, 18, the former carrying the fixed contact 20, and the latter a spring plate 24 on which is supported the movable contact 25. The contacts are opened when the armature is attracted by means of a nut 34 on the end of the striker engaging the plate 24. A spring washer 31 is disposed between the armature and the plate 24. The bracket 18 also carries an arcuate plate 28 on which the insulated terminals 29 are mounted. In a modification, both contacts are carried on one bracket, the other only carrying the circuit terminals.
Patent GB-184475-A (GB)
Title: Improvements in wireless telegraphy
IPC: H04J1/00
Filed: 1922-08-09
Abstract: 184,475. Abraham, H. Aug. 9, 1921, [Convention date]. Addition to 169,997. Multiplex and secret and selective signalling; thermionic amplifiers; undesired signals, eliminating and limiting.-In the wireless installation as claimed in the parent Specification, for signalling simultaneously on a number of different wave-lengths, two or more series of resonant circuits are arranged between the receiving aerial and the detector, each series being separately tuned to one of the characteristic wavelengths transmitted, and certain of the circuits being provided with reaction circuits. One such series comprises a tuned circuit 2, 3 connected to the aerial 1 and to a valve 4, 5, 6, which is back-coupled at 7 and is linked at 8 to a second synchronous circuit 9, 10 in the grid circuit of another valve 11, 12, 13, which, in turn, is retroactively coupled to the circuit 9, 10. The oscillations then pass through a third valve 15, 16 20 to a common resistance or inductance 22, to the terminals 23, 24 of which the detector is connected. The valve 18, 19, 21 represents the last element of a second series of resonant circuits tuned to the other characteristic wavelength of the desired signal and arranged in parallel with the first series between the aerial and the coil 22. Single, or multi-stage amplifiers may be interposed in the various resonant and reaction circuits. To prevent unauthorized listening a series of incoherent blocking signals, to which the receiving station is insensitive, may be transmitted simultaneously with the desired message. The message may also be obscured by changing the length of the emitted waves during transmission.
Patent GB-294654-A (GB)
Title: Manufacture of a fertiliser
IPC: C05C3/00
Filed: 1928-07-26
Abstract: 294,654. I. G. Farbenindustrie Akt.- Ges. July 29, 1927, [Convention date]. Manures.-A mixed fertilizer is prepared by causing ammonium nitrate to react in aqueous solution with a mixture of sodium chloride and potassium chloride and separating from the liquor the mixture of salts obtained. Ammonium chloride may be added to increase the nitrogen content. Specification 145,036 is referred to.