baber/WOPTO huggingface dataset:
Patent GB-1207808-A (GB)
Title: Improvements relating to longwall mining operations and apparatus for carrying out such operations
Inventor: WALMSLEY ALAN
IPC: E21D23/00
Filed: 1967-07-13
Abstract: 1,207,808. Mineral-mining installations. FLETCHER SUTCLIFFE WILD Ltd. 12 July, 1968 [13 July, 1967], No. 32201/67. Heading E1F. In a method of longwall mining a cutter loader machine 12 removes a wide web of mineral from the buttock of a longwall face 10 of a mineral seam and the newly exposed roof is immediately supported by the advancing of roof beams towards the newly exposed face, said beams having dependent chocks. The setting height and extension of the beams are such that, after completion of a cutting traverse of the face, the machine can be returned in an inoperative condition along the face beneath the roof beams. The beams 15 preferably form part of roof-supporting units 13 and each beam carries a dependent chock 16 at its outer end. (For Figure see next column)
Patent GB-759844-A (GB)
Title: Multi-stage explosion turbine plant and method of operating same
IPC: F02C5/12
Filed: 1952-12-19
Abstract: 759,844. Gas turbine plant. SCHILLING ESTATE CO. Dec. 19, 1952 [Dec. 24, 1951], No. 32273/52. Drawings to Specification. Class 110 (3) A multi-stage explosion gas turbine plant comprising at least a high pressure, an intermediate and a mechanically independent low pressure stage, which supplies external energy, has the live gases from the explosion chambers fed to the high pressure stage and to a space in advance of the intermediate stage which is also fed with the exhaust gases from the high pressure stage po that the characterizations of the pressure drop in the space is similar to that in the high pressure stage. An explosion gas turbine plant as described and claimed in Specification 759,841 is employed to supply working fluid to a useful power turbine arranged in a separate housing and also to drive the compressor and other auxiliaries of the plant. The working fluid before use in the power turbine may have additional fuel burnt in them or may be cooled. Inert gases, gas mixtures, vapours or vapour mixtures may also be added to these gases. If desired some of these gases may be withdrawn and used for other purposes. One or more of the explosion gas turbine plant may be associated with a single power turbine or each gas turbine plant may feed a number of power turbines. Specifications 759,840, 759,842, 759,845 and 759,846 also are referred to.
Patent GB-1193655-A (GB)
Title: Improvements in and relating to Automatic Fire Arms with Retarded Blow-Back Breech Mechanisms.
Inventor: CERMAK JIRI
IPC: F41A3/26
Filed: 1967-07-13
Abstract: 1,193,655. Automatic firearms. VYZKUMNY A VYVOJOVY USTAV ZAVODU VSEOBECNEHO STROJIRENSTVI. 13 July, 1967, No. 32312/67. Heading F3C. An automatic firearm has a retarded blowback breech mechanism which comprises a breech bolt carrier 5 and a breech bolt 6, the breech bolt 6 being provided with two symmetrically located pins 15 each carrying a rotatable roller 16. In the opening and closing movements of the breech mechanism each roller 16 co-operates with a first helical surface 17 arranged in a block 2 of the receiver 1. One or two cam surfaces is/are provided in the block 2 for co-operation with one or both of the rollers 16 respectively during the closing movement of the breech mechanism to initiate rotation of the breech bolt 6. The breech bolt carrier 5 is formed with two symmetrically located projections each of which has a second helical surface 18 which surfaces each co-operate with one of the rollers 16 in the closed and initial opening of the breech mechanism. The second helical surfaces 18 terminate forwardly in supporting faces 20 substantially perpendicular to the longitudinal axis of the breech bolt carrier, the faces 20 co-operating with the rollers during recoil and the major portion of the closing movement of the breech bolt. In the construction shown the rear end of the breech bolt 6 is provided with lugs 12 housed in a cavity 13 in the carrier 5, the lugs 12 being able to slide in grooves 14 of the carrier 5. The lugs serve to unlock the breech mechanism manually. Cartridges may be fed from a magazine or a cartridge belt several types of feeding pieces either rigid with the bolt (Figs. 3, 5, 6, 7, not shown) or pivoted thereto (Figs. 4, 8, 9, not shown) are disclosed.
Patent GB-823984-A (GB)
Title: Improvements in trays and their method of mounting
IPC: A47B21/04
Filed: 1956-10-24
Abstract: 823,984. Rack stands RICHARDSON, H. C., [trading as TRAYCO PRODUCTS.]. Jan. 23, 1958 [Oct. 24, 1956], No. 32377/56. Class 52(3) A stand for letter baskets 1 comprises a vertical post 2 clamped to a desk or the like 5 and carrying a number of brackets 6 for removably supporting the letter baskets. A pair of arms 7 spaced from the lower edge 9 of the bracket receive a plate 10 with ribs 11 secured to the bottom of the basket 1 while the upper rim of the basket is engaged by a flange 13. If solid baskets of e.g. plastic are used the arms 7 are dispensed with. The brackets are separated by spacers 4.
Patent GB-909008-A (GB)
Title: Improvements relating to the synchronising of electrical apparatus
Inventor: GIBBONS PHILIP DAVID
IPC: H02J3/42
Filed: 1959-09-23
Abstract: 909,008. Synchronizing arrangements. STONE-CHANCE Ltd. Dec. 15, 1960 [Sept. 23, 1959], No. 32434/59. Class 38 (4). Approximately equal voltages are produced at the secondary windings 5, 6, of two transformers 3, 4, the primary windings 1, 2 of which are supplied from voltages corresponding to those of a supply system and an alternator to be synchronized. Half-wave rectifier 7 connected in series with the two secondary windings passes positive current pulses whose amplitude varies from zero to a maximum at a frequency equal to that of the frequency difference between the supply and the alternator. The frequency dependent positive pulses are passed through a long time constant circuit comprising resistors 8, 9, 8 and capacitor 10 and hence a positive potential proportional to the difference frequency will appear at the junction of resistor 8 and capacitor 10. A portion of this potential derived from variable resistor 9 is applied between the base 12a and collector of an emitter follower connected transistor having a relay winding 23 controlling a paralleling contactor as its emitter load. A D.C. supply for the transistor is derived from secondary winding 20 and stabilized by resistor 21c and zener diode 22. When the supply source and the alternator are in asynchronism, the positive potential at the base 12a of the transistor is arranged to be such that the transistor is cut off, and hence no current will flow through the relay coil 23. When the difference frequency has reached zero, i.e. the alternator is in synchronism with the supply, the potential at the base of the transistor will be at a minimum value so that the transistor will conduct and thus energize the relay coil 23. Failure of the system to be paralleled and consequent loss of synchronism will immediately cause a rise in the positive potential and thus the drop-out of the relay winding controlled contactor. Zener diode 13 prevents damage to the transistor by limiting the base to emitter voltage to about one volt.
Patent GB-852334-A (GB)
Title: Methods of preparation of new salts of antibiotics and vitamins
IPC: B01J47/00
Filed: 1956-10-26
Abstract: A salt of a basic antibiotic and an acid vitamin is produced by affecting an anion interchange between an anion-exchange resin in the vitamin cycle and an antibiotic salt.  A solution of the antibiotic salt e.g. the sulphate is run through the column until the filtrate is free of sulphate ion and the solid salt recovered by (a) freeze drying, (b) evaporation in vacuo, (c) precipitation by the addition of a non-solvent.  Specified antibiotics are streptomycin, dihydrostreptomycin, neomycin, polymyxin, viomycin and isonicotinyl hydrazone of streptomycin.  Suitable vitamins are 1-ascorbic acid, nicotinic acid and a -pantothenic acid.  Typical resins are "Amberlite" (Registered Trade Mark), IRA-401 and IR-48, "Dowex" (Registered Trade Mark) 2, 1X2 and 1X8.  The examples relate to the preparation of (a) streptomycin pantothenate and (b) polymyxin B pantothenate.  Specifications 687,500 and 724,863 are referred to.
Patent GB-836204-A (GB)
Title: Regenerated cellulose filamentary material
IPC: D01F2/28
Filed: 1956-10-26
Abstract: High-tenacity regenerated cellulose filaments, produced by wet spinning a solution of an organic acid ester of cellulose and stretching and saponifying the product, are given an improved resistance to degradation by ultra-violet light by treatment with resorcinol monobenzoate.  The resorcinol monobenzoate is preferably applied to the filaments, before or after their formation into fabrics, in an amount equal to 0.1-5% of the weight of the filaments, and it may be applied from solution in an organic solvent, e.g. acetone, alcohol or benzene, or as an emulsion or other dispersion in a liquid medium by spraying, wiping, padding or passing the material through the medium.ALSO:High-tenacity regenerated cellulose filamentary material, produced by wet spinning a solution of an organic acid ester of cellulose and stretching and saponifying the product, is given an improved resistance to degradation by ultra-violet light by incorporating therein resorcinol manobenzoate. The resorcinol monobenzoate may be incorporated in the spinning solution, or it may be applied to the filamentary material, preferably after saponification, in an amount equal to 0.1-5% of the weight of the material, from solution in an organic solvent, e.g. acetone, alcohol or benzene, or as an emulsion or other dispersion in a liquid medium by spraying, wiping, padding or passing the material through the medium.
Patent GB-632176-A (GB)
Title: Improvements in or relating to apparatus for dental treatment
IPC: A61C1/05
Filed: 1946-11-04
Abstract: 632,176. Dental syringes. RIEDENER, F. Nov. 4, 1946, No. 32724. Convention date, Nov. 3, 1945. [Class 81 (ii)] In apparatus for rinsing or irrigating teeth under treatment, liquid is forced from a tank 4, by air supplied under pressure from a pump 12, along a hose 7 connected to a spray pipe or syringe 8 adjustably clipped to a drill head 1. Spent liquid and waste material is collected in a cup 21 and is sucked along a pipe 20 and a hose 19 to a collector vessel 14 connected to the suction side of pump 12. In a modification part of the suction pipe is formed as the hollow stem of a dental mirror. For irrigating root canals, the pipe 8 is inserted in a lateral opening in the pipe 20 and pushed through the cup 21 to enter the canal, the cup 21 resting on the mouth of the canal. The pipe 20 may be mounted on a holder for attachment to the mouth.
Patent GB-1117599-A (GB)
Title: Improvements in and relating to inverters with forced commutation
IPC: H02M7/44
Filed: 1966-07-21
Abstract: 1,117,599. Inverting. BROWN, BOVERI & CO. Ltd. 21 July, 1966 [23 July, 1965], No. 32834/66. Heading H2F. An inverter with commutating capacitors and uncontrolled rectifiers reversely connected across the main controlled rectifiers has saturable inductors in series with the main controlled rectifiers. The bias windings of the saturable inductors carry a current such that for zero main current the inductors are saturated in the sense in which forward main current would saturate them and with a small reverse main current they come out of saturation. In one embodiment, Fig. 1 (not shown) the commutating capacitor is connected directly between the anodes of a pair of arc rectifier valves. In an alternative arrangement employing two push-pull strings of thyristors, Fig. 3 (not shown), the capacitor is used to tune the secondary of an output transformer to resonance. The main control elements are shunted byreverse diodes connected in series with resistors, which may be shunted by capacitors.
Patent GB-521046-A (GB)
Title: Improvements in and relating to paper and like bags
IPC: B65D33/12
Filed: 1938-11-11
Abstract: 521,046. Carrier bags. LAMSON PARAGON SUPPLY CO., Ltd., and BARRETT, J. H. Nov. 11, 1938, No. 32839. [Class 133] A carrying handle for a paper or like bag provided at the mouth with a pair of string loops consists of a piece of wood &c. formed with one pair of tapered open slots 4 which may terminate in holes 5 and are adapted to grip firmly one loop 7, and a second pair of slots 6 in which the other loop 9 can be engaged in a readily detachable manner:
Patent GB-498549-A (GB)
Title: Improvements relating to windscreen wipers
IPC: B60S1/38
Filed: 1937-11-30
Abstract: 498,549. Windscreen-cleaners. TRICO PRODUCTS CORPORATION, and HORTON, E. C. Nov. 30, 1937, No. 33122. [Class 138 (i)] A wiper blade is provided with channels adapted to collect and hold moisture while the wiper is operating and to return the moisture to the screen, to lubricate it, as it begins to dry. The rubber or like blade has a bead 1, a flexible portion 3, an enlargement 5 with flanges 6, and a wiping edge 4 which is more flexible than the part 3. The side faces of the enlargement 5 are provided with ribs 8 defining moisture collecting channels 7 arranged at an angle to the edge 4. The sharp edges of the ribs may be arranged to engage, and clear dirt from, the windscreen.
Patent GB-194007-A (GB)
Title: An improved method for increasing the frequency of electric currents
IPC: H03B19/03
Filed: 1921-12-09
Abstract: 194,007. Jones, H. Sefton-, (Lorenz Akt.- Ges., C.). Dec. 9,1921. Frequency, changing.-In a method for increar,- ing the frequency of an alternating current, an oscillatory circuit is changed by impulses from a generator circuit, the curve of energy output of the generator being so distributed that it lies for a prolonged part of each period along the zero line. The oscillatory circuit is tuned to an integral multiple of the generator frequency, and the total time of each impulse is limited to the time during which it is of like sign with the free oscillation in the oscillatory circuit. In the arrangements shown, the oscillatory circuit is coupled to the generator circuit through a transformer t the core of which is so strongly saturated that a secondary voltage is generated only during the time when the primary current is near its zero. value. The primary circuit is tuned to the frequency of the generator h by means of a condenser c and inductance v. The wattless current in the generator may be neutralized by connecting the generator as a shunt across the primary winding of the transformer, Fig. 5, or across the whole or part of the inductance or condenser. In a modification, Fig. 8, the generator forms part of the tuned primary circuit and is shunted by an inductance s, preferably variable or by a condenser. Specification 192.460 is referred to. Reference has been directed by the Comptroller to Specification 180,672.
Patent GB-1438681-A (GB)
Title: Lubrication systems
IPC: F16N25/02
Filed: 1973-07-11
Abstract: 1438681 Lubrication LUMATIC Ltd 2 July 1974 [11 July 1973] 33137/73 Heading F2A [Also in Division B1] A manifold 1 for a lubrication system has a gas inlet duct 2, two mixer chambers 34, and two oil inlet ducts 15, 16, each of substantially uniform cross-section over a major part of its length, the gas inlet duct 2 having two first portions 29 and two second portions 34, each second portion 34 being coaxial with its respective first portion 29 and having a crosssection substantially uniform but larger than that of the first portion 29 to form one of the mixer chambers 34 each first portion 29 intersecting one of the oil duets 15, 16, at a location 30 close to a blind end 33 of the oil duct, e.g. 15, and spaced from the connection between the first portion 29 and the second portion 34, the other end 35 of each second portion 34 constituting an outlet orifice of the respective mixer chamber. Each mixer chamber 34, outlet orifice and first portion 29 of the gas inlet duct may be contained in a removable mixer member, e.g. 22. Each oil inlet duct 15, 16, may contain a non-return valve 36, Fig. 3 (not shown). The embodiment shows the manifold block 1 having a gas inlet duct 2 supplying four pairs of mixer chambers via ducts 7, 8, 9 and 10, Fig. 2 (not shown), each pair of oil inlet ducts being supplied by a metering device 20 bolted to the manifold block 1.
Patent GB-429160-A (GB)
Title: Improvements in coin-freed mechanism for automatic delivery machines
IPC: G07F11/24
Filed: 1934-11-19
Abstract: 429,160. Coin -freed article-delivery apparatus. HARPER, P. S., 1, Ashurst Walk, Croydon. Nov. 19, 1934, No. 33217. [Class 27] Relates to articledelivery apparatus of the kind described in Specification 336,818, [Class 27], in which an escapement - controlled packet-retaining device is rotated by the weight of the packets to deliver the bottom packet when the escapement is actuated by the inserted coin. According to the invention, in an apparatus where a pair of retaining devices are employed disposed side by side in parallel relation, the retaining devices 4, 5, Fig. 1, are geared together and form a pocket which supports the bottom packet at its bottom and both vertical sides. The retaining-devices may be as described in Specification 336,818 or as described in Specification 428,917. The rods 8 of the device 4 supports the bottom and one vertical side of the bottom packet 2, while the rods 7 of the device 5 supports the other vertical side.
Patent GB-938801-A (GB)
Title: Production of alkaloids and analogues thereof
Inventor: BATTERSBY ALAN RUSHTON
IPC: C07D471/22
Filed: 1958-10-17
Abstract: The invention comprises synthetically produced toxiferine and derivatives of toxiferine of the formula <FORM:0938801/IV(a)/1> wherein R1 is H or CH3O, R is a hydrocarbon or substituted hydrocarbon group, e.g. -CH3, -C2H5 or -CH2.C6H5, -C3H7, -C2H4OH or -CH2CN, Abis an anion having a charge of 6 electrons and m is an integer such that the product of b and m is 2; and comprises also the preparation of these compounds by treating a compound of the formula <FORM:0938801/IV(a)/2> wherein Anis an anion of valency n, with a strong organic acid.  The acid is preferably a compound of the formula R1R2R3C.COOH wherein R1 and R2 are alkyl groups and R3 is hydrogen or an alkyl group, e.g. pivalic, isobutyric and 2-ethylhexanoic acid.  Intermediates of the second formula above are made by quaternisation of the Wieland-Eumlich aldehyde or its appropriate methoxy derivative.
Patent GB-797201-A (GB)
Title: Novel enol-ethers and a process for the manufacture thereof
Filed: 1956-05-31
Abstract: The invention comprises 1-alkoxy-2-[21,61,61-trimethyl - cyclohexen - (11) - yl - (11)] - ethylenes and 1 - alkoxy - 4 - [21,61,61 - trimethyl cyclohexen - (11) - yl (11)] - 2 - methyl - butadien - (1,3) and the corresponding compounds which carry an additional double bond in the 31,41-position.  They are made by acetalising a compound of the formula <FORM:0797201/IV (b)/1> where R1 is =CH-CH=O or =CH-CH=C (CH3)-CH=O and the broken line indicates the optional presence of a double bond in 2,3-position of the cyclohexylidene ring, by treating same with a tri-alkyl ester of an orthoalkanoic acid in presence of an acid condensing agent, and splitting off one molecule of alcohol from the acetal obtained by heating with an acidic agent in presence of a tertiary base, e.g. by (1) heating with phosphorus pentoxide in presence of an organic base, (2) heating with phosphorus oxychloride in pyridine, or (3) heating with acetic anhydride in a tertiary base.  In examples: (A) [2,6,6-trimethyl-cyclohexylidene-(1)] - acetaldehyde, (B) [2,6,6 - trimethyl-cyclohexen - (2) - ylidene - (1)] - acetaldehyde, (C) 4 - [21,61,61 - trimethyl - cyclohexylidene-(11)]-2-methyl - buten - (2) - al - (1), and (D) 4-[21,61,61-trimethyl - cyclohexen - (21) - ylidene - (11)] - 2 - methyl-buten-(2)-al-(1) are each heated with orthoformic acid ethyl ester in presence of orthophosphoric acid to give respectively (A) 1,1 - diethoxy - 2 - 21,61,61 - trimethyl - cyclo-hexylidene - (11)] - ethane, (B) 1,1 - diethoxy-2-[21,61,61 - trimethyl - cyclohexen - (21) - ylidene-(11)] - ethane, (C) 1,1 - diethoxy - 4 - [21,61,61-trimethyl - cyclohexylidene - (11)] - 2 - methyl - butene - (2), (D) 1,1 - diethoxy - 4 - [21,61,61-trimethyl - cyclohexen - (21) - ylidene - (11)]- - methyl-butene-(2), which are heated with phosphorus oxychloride or acetic anhydride in a mixture of pyridine and toluene to give respectively (A) 1 - ethoxy - 2 - [21,61,61 - trimethyl-cyclohexen - (11) - yl - (11)] - ethylene, (B) 1-ethoxy - 2 - [21,61,61 - trimethyl - cyclohexadien-(11,31) - yl - (11)] - ethylene, (C) 1 - ethoxy - 4 - [21,61,61 - trimethyl - cyclohexen - (11) - yl - 2 - methyl - butadien - (1,3), (D) 1 - ethoxy - 4 - [21,61,61 - trimethyl - cyclohexadien - (11,31)-yl-(11)] - 2 - methyl - butadiene - (1,3).  In the above, alkyl radicals contain 1-6 carbon atoms.  Specifications 783,389 and 789,693 are referred to.
Patent GB-944864-A (GB)
Title: Magnetic recording media
Inventor: BAUER BENJAMIN B
IPC: G11B5/02
Filed: 1962-08-31
Abstract: 944,864. Magnetic recording medium. MINNESOTA MINING & MANUFACTURING CO. Aug. 31, 1962, No. 33560/62. Heading H1H. A magnetic recording medium has adjacent layers of anisotropic magnetic material, one having maximum permeability in a direction in the plane of the layers and the other having maximum permeability in a direction at right angles to the layers. In the Figure, a tape 14, which may be of paper, cellulose acetate or " Mylar " (Registered Trade Mark) is first coated with a layer 15 of particles in a binder, the particles being aligned by a magnetic field, and when the first coating is set a second layer 16 is applied, preferably only 2 or 3 microns thick. The particles of the layer 16 may have a higher coercive force and a lower remanance than those of the layer 15.
Patent GB-929211-A (GB)
Title: Plated rubber adherent steel wire and the method of producing the same
IPC: B29C70/68
Filed: 1961-09-19
Abstract: 929,211. Plating steel wire and coating with rubber. UNITED STATES STEEL CORPORATION. Sept. 19, 1961 [Sept. 26, 1960], No. 33580/61. Class 41. Steel wire is prepared for coating with rubber by (1) cleaning, (2) plating with a thin coat of Cu, bronze, or brass to a thickness 0.3 X 10<SP>-6</SP> to 2.5 x 10<SP>-6</SP> inches. Cleaning consists of carburising any die lubricant, then pickling in HCl or H 2 SO 4  at 160‹ F. and washing. The plated wire is then coated with rubber and vulcanized. The brass plating contains 60 to 80% Cu, and the bronze plating 80 to 90%. Alkali cyanide plating baths are preferred.
Patent GB-194641-A (GB)
Title: Improvements in or relating to the power propulsion of road vehicles
IPC: B62D59/04
Filed: 1922-04-27
Abstract: 194,641. Dunkley, W. H. April 27, 1922. Addition to 188,800. Cycle tractor attachments; motors, mounting. -The perambulator and other light vehicle propelling attachment described in the parent Specification is constructed in one form with a longitudinal transmission shaft and two sets of gearing, and in another form with a motor pivotally mounted and having a variable speed friction disc which engages the road wheel. In the first form, the motor is arranged forwardly with its crank shaft transversely, and drives the longitudinal shaft through one set of bevel gearing, the rear end of the shaft being connected to the road wheel by a second set of bevel gearing. In the second form the motor drives the friction disc 27 through bevel gear, the motor and gearing being pivoted to the frame of the attachment at 21 and adjustable so that the disc 27 may drive the! road wheel 16 at different speeds. The centre of the disc is recessed to give a disconnecting position.