704 THE COLLIERY GUARDIAN. March 27, 1914. becomes lowered, the heat previously taken up by the carbon dioxide is now transmitted to the vapours, and utilised as heat of formation for the production of endothermic hydro- carbons, thus producing a large volume of light oils of the benzol series, and an increased yield of ammonia, leaving the carbon in graphitic form. The vapours are given off, during carbonisation, at the temperature of their formation, and are condensed into fixed liquid products according to their boiling points. (One claim.) 26430 (1912). Improvements in and relating to Electric Hauling Plant. Aktiengesellschaft Brown, Boveri et Cie., of Baden, Switzerland.—The invention is based on the principle that with similar retardation of the machine for a negative load (lowering), considerably greater braking currents are required than for a positive load. With nega- tive loads it is desirable that the last portion of the wind shall be made at a greatly reduced speed, whereas with positive loads it is desirable that the automatic stoppage of the machine be effected just before the end of the wind, with the object of shortening the hauling periods as much as possible. This can be done without affecting the security of the haulage, because there is less risk of overwinding with a positive load than with a negative load. According to the invention it is possible not only to vary the degree or extent of the electric braking by means of resistance, but to obtain at the same time a variation of the length of the braking travel. The invention mainly consists in an arrange- ment in which the point in the travel at which resistance comes into action is varied according to the direction and magnitude of the hauling motor power. The accompanying figure shows a general complete arrangement as to one form. The mechanical return of the controlling lever is effected by t. v- ~ s I' a I I the two drivers t and t, through the intermediary of the travelling nut r, rb Before this returning of the controlling lever is effected a collar 10 on the connecting rod carrying the ratchet portion o is lifted by the depth indicator or driver r or r1, whichever at the particular moment is ascending, and is carried along by the same. The ratchet member o in its turn carries with it through the inter- mediary of the pawl p, the switch lever of the retarding resistance k, which is normally held by the weight q in the open circuited position. The power relay i h causes an engagement of the pawl p with various portions of the ratchet o according to the load on the hauling motor, so that, for instance, with maximum negative power it comes into engagement with the first tooth of the pawl member o, and with maximum positive power with the last tooth of said member, the intervening teeth being utilised for inter- mediate loads. A part of the connected up resistances may be gradually disconnected towards the end of the stroke, in order to prevent too low a speed of the hauling motor. The switch s, in co-operation with the switch contact w x operated by the controlling lever, effects the complete short circuiting of the resistance k as soon as the controlling lever at the end of the stroke is moved in the opposite direction for the next start. The upward movement of the nut r, causes the wedge bar 6 to engage with the projection 8, so as to rotate the switch actuating rod 14 in its bearings 11,12, and effects the moving over of the switch s, as soon as the reconnecting up of the retarding resistance k becomes necessary for the next retardation. Similarly the switch s is returned to the position shown, by the upward movement of the nut r causing engagement of the wedge bar 7 with projection 9. (Five claims.) At a meeting of the English and Scottish Steelmakers' Associations, which was held in Newcastle on Friday to discuss the position existing in regard to the rebate scheme, it was decided not to make any change in the arrangements as they at present operate. This means that the current market values for steel ship plates and angles are subject to a rebate of 5s. per ton under the existing scheme, which does not, however, apply in the case of the Scottish Association. HEW PATEHTS CONHECTED WITH THE COAL AHD IRON TRADES. Applications for Patents. 6564. Means for converting single-phase rotary converters into triple-phase. A. M. Taylor. 6574. Indicators for recording or displaying signals in mines. Garswood Hall Collieries Company Limited and T. Eddleston. 6576. Track brakes on railways. L. W. Williams, O. R. Williams, and D. D. Williams. 6577. Operation of railway points, locking-bars, and plungers. L. W. Williams. 6580. Valves for rock-drills. G. H. T. Rayner. 6589. Attachment for coal-cutting machines of the disc type. R. Wotherspoon and W. Wotherspoon. 6591. Means and mechanism for jigging, classifying, and jig-classifying ore, coal and the like. W. A. Harris. 6600. Superheater systems. W. E. English, J. R. Hannan, and C. H. Mills. 6608. Explosives. A. E. Charbonneaux. 6624. Process for the electrolytic coating of sheets and plates with other metals. S. O. Cowper-Coles. 6625. Manufacture of electrolytically coated metal plates. S. O. Cowper-Coles. 6626. Process for the electro-deposition of iron. S. O. Cowper-Coles. 6630. Safety cluches for couplings. W. R. Winter. 6669. Process for preparing aliphatic aldehydes from the gases proceeding from the dry distillation of pit coal, brown coal, peat, wood and the like. J. Behrens. 6702. Haulage clips. T. Johnston. 6704. Miners’ electric safety lamp. W. Whitehead. 6714. Internal-combustion pump. F. W. Golby. 6733. Railway couplings. E. Eichler and G. Eichler. 6755. Explosive, and process for making the same. W. J. Hoynes. 6759. Pump and other pistons. G. S. Warin. 6760. Mechanical stokers. C. Anschutz. 6768. Furnace linings. W. S. Rawson. 6786. Driving chains of the roller type. C. G. Eden and H. Renold Ltd. 6824. Belts for elevating, conveying and other machines. W. H. Baxter. 6865. Reduction of metallic oxides and the like. F. W. Highfield. 6866. Electrical treatment of ores. F. W. Highfield. 6884. Utilisation of fuel. S. Z. de Ferranti. 6885. Steam generators. S. Z. de Ferranti. 6896. Rotary pumps, blowers, and the like. M. Giittner. 6915. Clutches. A. Lanzdorf. 6951. Haulage clips. J. Hill. 6958. Adjusting-mechanism for roller mills. T. Robinson and Son Limited, C. J. Robinson, and T. J. Stevenson. 6969. Treatment and reduction of complex sulphide and other ores. H. R. Angel. 6997. Mechanical stoking apparatus. C. G. Redfern. 7003. Portable breathing apparatus. W. J. Mellersh- Jackson. 7027. Treatment of slag for the manufacture of bricks and for other purposes. W. E. Evans. 7097. Tipping wagons. M. H. Spear. 7107. Surveying instruments. H. R. von Winterhalder. 7113. Process for the recovery of metals from slags and molten masses or smeltings. A. Mond. 7116. Construction of retort for the distillation, carbonisa- tion, and the like of coal and other carbonaceous materials. C. W. Tozer. 7117. Process for treating carbonaceous material. C. W. Tozer. 7186. Process for the removal of iron from oxides or roasted sulphide tin ores by treatment with acids. M. Chiapponi, R. Hesse and G. von Rauschenplat. 7215. Process for electro-plating iron and steel platesand the like. S. O. Cowper-Coles. 7216. Apparatus for electrolytically coating iron and steel plates with other metals. S. O. Cowper-Coles. Complete Specifications Accepted. To be published on April’9, 1914. 1913. 1152. Recovery of copper from its ores and solutions. Sulman, Picard and Minerals Separation Limited. 6107. Elevator cages. Sidlo. 6321. Workmen's time recorder with printing mechanism and displaceable inking ribbon. Burk. 6572. Rolling machines. Ross. 6759. Valves. Purser. 10048. Rotary pumps or blowers. Robertson. 11966. Prevention of corrosion of iron and steel. Hane- mann and Hanaman. 12024. Means for the prevention of shock when lowering mine cages on to the keps. Bannister and Bever, Dorling and Co. Limited. 18270. Process for converting fine coal into a marketable fuel. Evans. 21353. Centrifugal fans. Hancock. 27151. Rope railways. Thunhart. Complete Specifications open toi Public Inspection before Acceptance.) 1913. 26442. Rolling mill and similar installations.1! iWebster. 26444. Speed-controlling mechanism for rolling mills and the like. Clark. 1914. 303. Process for the production of producer gas from bituminous fuels in a gas-producer furnace. Dellwik Fleischer Wassergas Ges. PUBLICATIONS RECEIVED. “ Preliminary Statement on the Mineral Production in Province of Quebec during 1913 ”; “ Revista Tecnica del Ministerio de Obras Publicas—Publication Mensuel ” (No. 38), February ; “ Bulletin et Comptes Rendus Mensuels de 1’Industrie Minerale ” (tome 5, No. 2), February; “ The Engineering Magazine ” (Vol. 46, No. 6), March, price Is.; “ Revue Universelie des Mines et de la Metallurgie ” (tome 5, No. 2), February; “ Proceedings of the South Wales Institute of Engineers ” (Vol. 29, No. 7; Vol. 30, No. 1), price 2s. 6d. per part. GOVERNMENT PUBLICATIONS. Any of the following publications may be obtained on application to this office at the price named post free. Railway Commission Evidence, Eighth Day, February 19, 1914, Is. Id. Boiler Explosion Reports : No. 2278, Steam Drifter “ Harry,” 2|d. ; No. 2277, Steam Drifter “ David B. Summers,” 2Jd. ; No. 2252, Devonshire Works, Barrow Hill, 4Jd. Bills, 1914 : Checkweighing in Various Industries, 3|d. ; Patents and Designs, Id. ; Smoke Abatement, 2d.; Educa- tion Administrative Provisions, lid. Gas Undertakings Returns : Companies, 1912, Is. Id. ; Local Authorities, 1912-13, 8d. Cases of Industrial Poisoning in Factories and Work- shops, 1913, lid. Foreign Trade and Commerce: Accounts for February 1914, 7d. Panama Canal Tonnage Measurement Rules, 3id. Memorandum on the Heat Test as Applied to Explosives, Is. lOd. The Alcohol Motor Fuel Investigation.—The Committee appointed by the Imperial Transport Council to investigate the possibilities of alcohol as a motor fuel have issued a preliminary report, in which they outline the task which lies before them. They divide the investigation into two main branches, as it affects the British Isles and the Empire overseas; and the British problem is again divided into two portions—(a) the utilisation of alcohol as a fuel for industrial and agricultural engines of medium or low speed; and (6) its use in high-speed internal-oombustion engines. The latter branch of the problem is rendered more difficult, owing to the enormous number of such engines already in existence, and designed specifically for use with fuels at present available. Consequently, the problem would seem to be the production of some mixture of the new fuel with an existing fuel, this mixture being suitable for use in the existing type of engine and serving materially to increase the total fuel supply during the transition period, while the present type of engine is being gradually modified to suit the new conditions. The problem as regards the Empire overseas is regarded by the Committee as in some respects less complex, since the number of internal-combustion engines in use is not so great, and it would, therefore, be more feasible to encourage immediately the use of types designed to suit the new fuel. The work to be done is subdivided into laboratory work and office work, including the collection of statistics and information. On the most important subject of denaturing, the Committee say that ultimately this question will have to be discussed with the Home and Dominion Governments, with a view to a mutual agreement as to the smallest quantity of the cheapest and most satisfactory denaturant which these Governments will allow in a fuel alcohol to be sold on the open market. ALL-BRITISH MANUFACTURE. ■ Illustration of the apparatus fitted with telephone, the battery box and telephone wire in lifeline is shown. SELF-CONTAINED DIVING APPARATUS (NO AIR PUMPS OR TUBES REQUIRED). Designed more particularly for work in Flooded Mines and other difficult situations where the use of Air Pumps and Tubes would be impracticable. This apparatus, in its original form, was used with great success when the Severn Tunnel (Great Western Railway) was flooded in 1880. ALSO UAK1.KS OF THE “ PROTO ” (Fleuss-Davis Patent) RESCUE APPARATUS. SMOKE HELMETS. RESPIRATORS. OXYGEN REVIVING APPARATUS, &C., &C. SIEBE, CORMAN & CO. LTD., “Neptune” Works, LONDON, S.E. Telegrams—“ Siebe, Lamb, London.” Telephone No.—251 Hop. Agent for North America and Mexico-H. N. ELMER, 1140, Monadnoch Block, Chicaco. £££ safety lamps, LAMPROOM FITTINGS, Enamelled Notice Plates, ----------- APPLY - PROTECTOR LAMP *^°T|NB CO LTD., ECCLES. ALFRED ALLEN & SON MaJKei'H ot TLaTI3o 0^- and COLLIERY TUBS in IRON, STEEL and WOOD. Loewer Gornal, nr. Dudley. Telegrami—“Allen, Loweb Gobnal.” Telephone—106 Dudley.