304 THE COLLIERY GUARDIAN. February 7, 1913. street, London, E.C., and E. Eaton, 5, Abchurch-yard, London, E.C.—This invention consists in the addition of naphtha or other tar oil to a combination of ingredients as follows:—70 per cent, by weight of cinders or domestic house coal ashes ground to powder, 10 per cent, by weight of ordinary lime or chalk, and 20 per cent, by weight of j tar solidified by treatment with sulphuric acid in known manner. The whole of these ingredients are, after passing through a suitable grinding and mixing machine (which may be steam jacketed), carried to a pug where ordinary steam, or superheated steam, is admitted. At this point a small proportion (from 2| per cent, to 5 per cent, by weight) of naphtha or other tar oil is admitted into the pug, and the mixture is then passed on to the stamps or briquetting machine. The percentage of tar may be varied from 10 to 20 per cent, of the mixture; the percentage of lime or chalk from 10 to 50 per cent, of the mixture. (One claim.) 17477 (1912). Improvements in and relating to Chucks for Percussive Drills and the like. J. Drinnan, 327, Penistone- road, Sheffield, Yorkshire.—This invention relates to chucks for percussion drills and the like, and particularly to that type in which the percussive action of the drill operates to tighten the lock on the drill in the socket carrying it, and it has for its object a construction which enables the drill to be released from the chuck without any hammering action, which deteriorates the parts forming the locking mechanism so rapidly that the replacement constitutes an exceedingly heavy item in the upkeep of the drill. This end is attained by so constructing and arranging the socket adapted to carry the drill that the axis of the exterior of said socket lies at an angle with the axis of the interior thereof adapted to carry the drill, said angle being such that the two axes recede from one another in the direction of the front end of the socket, and by mounting on said socket a ring-shaped piece of considerable mass which is free to slide in longitudinal relation to said socket and is adapted to engage the drill by means of an inter- mediate key-shaped piece operating through a longitudinally arranged radial slot in the side of the socket opposed to the greatest eccentricity of its exterior surface, said piece being kept up to its work by means of a set screw threaded in the ring-shaped piece. Fig. 1 is a broken view in longitudinal section, fig. 2 is a broken view in longitudinal plan, and fig. 3 is a view in end elevation. (Three claims.) 26308 (1911). Improvements in Conveyor Chains. T. Goulden, of Mill Hurst, Mill Green, Ingatestone, Essex, and J. N. Beeson, of Lawn House, Beckton, Essex.—This invention relates to improvements in conveyor chains of the kind comprising a pair of chains having push plates or the like connected thereto at intervals, said push plates com- prising bars provided at their ends with laterally extending members serving as and replacing certain of the links, projections being provided on said plates for guiding the conveyor chain in the trough or the like in which it runs. The invention consists in the arrangement that the projections are formed as ribs rectangular in cross-section and extending from the upper side of the chain to the lower. The invention is illustrated in the accompanying drawing, in which fig. 1 is a side elevation of a portion of a conveyor chain provided with the improved arrangement; while fig. 2 is a plan of fig. 1. (One claim.) 27005 (1911). Improvements in Apparatus for the Continuous Distillation and Purification of Crude Petroleum, Coal Tar and the like. E. A. Barbet, of No 173, rue Saint-HonorS, Paris, France.—This invention relates to the continuous rectifica- tion of the fractional distillations of crude petroleum and of -coal tar. The invention consists in apparatus comprising a single rectifying column, provided with a still or boiler heated by direct fire, and containing the usual plates and caps, the column being divided into a number of zones by the interposition of internal tubular condensers, for the purpose of effecting such a degree of partial condensation of the ascending vapours that the condensate descends through the plates of the column and is boiled again, so that any light constituents contained therein are evapo- rated, leaving at each zone, to be subsequently drawn off, in a liquid state, spirits, petroleums or oils which are perfectly ft ■tn ini? ■,’i (Si ai. homogeneous as regards volatility. The invention is moreover characterised by the combination of the improved rectifying apparatus with auxiliary boilers for the purpose of obtaining a continuous distillation by carrying on to a very great extent the extraction of heavy oils, and by a particular combination for the distillation of the tars and the extraction of the naphthalene. Fig. 1 shows diagram- matically in elevation one form of apparatus for carrying out the invention; fig. 2 is a plan view showing a device for effecting continuous working. (Six claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 2110. Botary engines, pumps and compressors. C. C. Champeney. 2181. Percussive hammers, drills and the like. W. H; Wakfer and S. Peck. 2193. Smoke consumers. N. Comaianni. 2254. Furnaces for steam boilers and the like. A. W. Brewtnall. 2255. Bridges and the like for furnaces. A. B. Lennox and A. W. Brewtnall. 2282. Charging retorts and the like. S. Tagg. 2283. Treatment of peat by carbonisation. N. Testrup, M. A. Adam, T. Bigby, G. W. Andrew, and Wetcarbonising Limited. 2289. Cupola furnaces. P. Anderson. 2301. Chocks for colliery tubs or wagons. P. Widdas. 2305. Means for supplying fuel to gas engines. F. H. Bates. 2306. Apparatus for conveying and discharging coal and similar materials. G. J. Wilson. 2349. Vaporisers for suction gas producers. J. Dallas and I. H. Storey. 2362. Explosives. B. W. Wallace and E. Wassmer. 2367. Apparatus for charging and spreading pyrites in roasting furnaces. Soc. Octave Battaille et fils and Pierre Piperaut. 2372. Electric safety lamps for mines. T. Attwater. 2373. Centrifugal pumps or compressors. B. A. Hayes. 2416. Furnaces. N. Penter. 2448. Miners’ picks. J. Corbett. 2456. Prevention of pit-cage accidents. A. G. Price and W. Price. 2458 Steam generators. A. W. Field. 2475. Printing steelyard or like weighing machines. H. Pooley and Son Limited, and J. Dobson. 2487. Metal alloy. E. Haynes. 2489. Furnaces particularly applicable for metallurgical purposes. J. A. Hill. 2497. Adjustable belt fastener to give correct tension to belt without cutting belt^or removing same from pulleys. J. F. Shaw. 2546. Safety signalling apparatus for use in mines. J. Close. 2547. Overwind prevention mechanism and similar safety devices for use in coalmines and the like. C. F. Jackson and H. F. Staley. 2555. Manufacture of gas and apparatus therefor. A. J. Liversedge and W. B. Davidson. 2642. Brake apparatus for railway wagons. J. A. Yeadon. 2650. Collier’s drinking jack. H. Jones. 2654. Furnace back bridges. W. H. Gould. 2655. Bocking-bar furnace for boilers where steam is generated. D. Wilkinson. 2658. Blast-pipes or apparatus for inducing draught for locomotives and similarly built boilers. W. Lewis. 2660. Bailway sleepers. W. B. Brown and J. L. Stokes. 2685. Superheaters. H. A. Stenning. 2704. Travelling cranes or the like. C. Cippitelli. Complete Specifications Accepted. To be published on February 20. 1911. 23576. Apparatus for promoting circulation in steam boilers. Circulators Limited, Schofield and Sedgwick. 26484. Process for protecting iron surfaces from corrosion. Cowper-Coles. 29129. Manufacture of metal tubing. Mackenzie. 1912. 2713. Beciprocating conveyors. Turnbull. 2844. Botary pumps, blowers, motors, and the like. Lamplough. 2890. Steam superheaters. Hollinworth. 2908. Construction of furnace covers and doors having removable facings of refractory material. Winder and Muxlow. 4731. Winches and the like for hauling purposes. Linford. 4947. Machines for use in mining minerals, particularly adapted for use in mining coal and the like. Mavor and Coulson Limited and Mavor. 5056. Improved system of damping dust in trains of trams or tubs in coal and other mines, and apparatus therefor. Evans and Bichards. 6391. Treatment of steel ingots. Talbot. 7754. Automatic coupling for railway carriages, wagons, and the like. Smith. 8716. Interference method for ascertaining the presence of minerals in the earth or the underground water level. Lowy. 10047. Scrapers for belt conveyors. Afzelius. 11568. Explosive and method of manufacturing the same. Baschig. 11583. Core-drilling machines. Lake. 12612. Supports for mining drills. Newton. 15584. Process for recovering tar and ammonia from volatile products of the carbonisation of coal. Dr. C. Otto and Co. Ges. 16681. Water-softening apparatus. Fox. 19287. Electric furnaces. Gonnet. 19498. Arrangement and mounting of boiler or other coverings of heat non-conducting materials and appliances therefor. Wild and Kolkmann. 19608. Steam superheaters. Schmidt’sche Heissdampf Ges. 20227. Safety device for water tanks used in connection with the coolers of air compressors. Day and Windeler. 22313. Trip hammers. Patten. 28553. Bemoval of clinker from furnaces. Karl, Prinz Zu Lowenstein. 29784. Miners’ props. Lantzsch. 29182. Gas producers. Von. Kerpely. Complete Specifications open to Public Inspection before Acceptance. 1913. 1640. Sectional boilers. Oscar B. Mehlhorn (firm of). 1700. Coke elevators. E. Coppee^ GOVERNMENT PUBLICATIONS. Any of the following publications may be obtained on application to this office at the price named post free. QU ABBIES : Special Bules, No. 16. l£d. Boiler Explosion Beport: Nos. 2168, 2196, 2197, 2|d. each ; Nos. 2193, 2194, 4£d. each. Trade Unions (No. 2) Bill [358J, 2d. Consular Beports: Honduras (5038), 4^d.; Persia (5037), 2-^d. Malay States Beport for 1911, lOd. Industrial and Provident Societies: Form A.B. 17 and Form A.B. 19, 3£d. each. MINES : Beference Bules No. 10, l|d. Factory Begulations, January 2, 1913, 2|d. PUBLICATIONS RECEIVED. Text Book of Petrology. Vol. 2, "The Petrology of the Sedimentary Bocks.” By F. H. Hatch, Ph.D., and B. H. Bastall. London: George Allen and Co. Limited. Price 7s. 6d. net. Coal. By F. H. Wilson, London: Sir Isaac Pitman and Sons Limited. Price Is. 6d. net. “ The Main Colliery Company Limited Tide Table and General Information as to the Company’s Collieries and Shipbuilding Wharves at Neath (South Wales) for 1913; " Bevue Universelie des Mines de la Metallurgie” (Tome 1, No. 1), Janvier; "Transac- tions of the Mining Institute of Scotland ” (Vol. 35, Part 2) ; " Sonder-Abdruck aus der * Zeitschrift des Oberschlesisohen Vereins’ (November, Heft 1912) — Erderschuttungen und Bergschaden”—von Bergrat B. Knochenhauer; " Bulletin et Comptes Bendus Mensuels de la Societe de 1’Industrie Minerale ” (Tome 3, No. 1), Janvier; " The Journal of the South African Institution of Engineers” (Vol. 11, No. 6), January, price 2s. Grimsby Coal Exports.—The exports of coal from Grimsby during the week ended January 31 totalled 13,578 tons to foreign ports, and 1,460 tons coastal, the detailed shipments being shown by the official returns as follow:—Antwerp, 686 tons ; Christiania, 1,781; Dieppe, 1,020; Esbjerg, 630; Gothenburg, 2,294; Halmstad, 50; Hamburg, 473; Horsens, 637 ; Landscrona, 1,296; Malmo, 2,010 ; Nexo, 692; Bonne, 505; Botterdam, 718; Skien, 102 ; and Tonsberg, 684. The coastal shipments were:—Gravesend, 580; Hayle, 790; and London, 90 tons. Institution of Mechanical Engineers.—The sixty-sixth annual general meeting will be held in the meeting hall of the institution on Friday evening, February 14, at eight o’clock. The following paper is to be read and discussed:—" Modern Condensing Systems,” by A. E. Leigh Scanes, M.A., of Manchester. The following paper (for discussion in writing only) is now ready for distribution:— " The Design of Volute Chambers and of Guide-passages for Centrifugal Pumps,” by Prof. A. H. Gibson, D.Sc.,member, of University College, Dundee. Communications upon this paper should be sent to the institution before April SO, 1913, when the discussion will be closed. A graduates’ lecture will be delivered Monday, February 10, at 8 p.m., on " The Applications of Polarised Light to Mechanical Engineering Problems of Stress Distribution,” by Prof. E. G. Coker, D.Sc., F.B.S.E , member, of Finsbury Technical College, London.