242 THE COLLIERY GUARDIAN. July 30, 1915. maintain the closed circuit through the terminals o1, o2. Upon a signal requiring to be given, and the operator pulling the line wire endwise, the box o is tilted, and the mercury thus caused to flow to one end of the box and uncover one of the terminals, thereby breaking the main circuit. The box o may have ia pendant arm o3, by which it may be tilted by hand, said arm normally holding the box horizontal. It will be understood that visual indicators may be employed. (Four claims.) 20549 (1914). An Improved High Voltage Insulated Cable. C. J. Beaver, of Rangemoor, Crescent-road, Hale, Cheshire; and E. A. Claremont, of Broom Cottage, High Legh, Cheshire.—Has reference to high voltage insulated cables, where it is desirable to increase the radius, and hence the cross section area of the conductor beyond what is neces- sary to attain the desired current carrying capacity in order to minimise the stress on the insulation in the neighbour- hood of the conductor, and thus reduce the otherwise neces- sary thickness of the insulation; and the invention has for its object to save the waste of copper involved in enlarging the cross section area of the cable, and at the same time to secure on the one hand the necessary flexibility, and on the other security from distortion necessary in a high voltage cable. The conductor consists of :—(a) A hollow core in the nature of a tube made of lead or other suitable metal; (5) strands of copper laid on the core spirally; and (c) a thin lead tube on the outside of the copper strands. The con- ductor is insulated with insulating material of any suitable kind, and according to any suitable method now in use. (One claim.) HEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 10437. Safety plate nozzle box for steel ladles. S. R. Passmore and R. W. Miles. 10484. Expanded metal manufacture. N. E. Clark. 10520. Elevators. Suisted’s Patent Coal Elevator Limited, and C. Robinson. 10538. Devices for securing wire ropes together, and for analogous purposes. F. A. Bullivant and G-. M. Selby. 10548. Coal picking apparatus. F. H. Emery. 10566. Tuyeres. C. Lever. 10567. Buffers. Brown Bayley’s Steel Works Limited, and T. H. Sanders. 10582. Process of and apparatus for distilling and cracking oils. W. A. Hall. 10595. Process for the production of materials for use in the manufacture of explosives. S. Smith, and Ammonia Soda Company Limited. 10601. Annealing or like furnaces. W. D. Williams., 10623. Fan, blower, pump, or the like. A. Maximoff. 10626. Over-luffing device for limiting the maximum and minimum radii of a jib, more particularly for use with jib cranes and the like. H. Ramsbottom. 10646. Portable hoists or elevators. J. T. Hardaker. 10654. Construction of turbine wheels. J. Hanson. 10664. Apparatus and means for increased circulation in steam boilers. Circulators Limited, S. J. Ross, and H. Schofield. 10668. Electric welding machines. Deutsche Schweiss- maschinenbau und Vertriebs G-. m.b. H. 10680. Couplings for armoured or protected cables and elec- tric conductors for use under water and elsewhere. V. C. Hastings and G-. Fiorentino. 10732. Condensing steam turbine plants. K. Baumann. 10745. Points for tramways, railways, and the like purposes. Edgar Allen and Company Limited, W. E. Robinson, and E. Larmuth. Complete Specifications Accepted. (To be published on August 12.) 1913. 18912. Method of heating the chequer brick heaters of blast- furnaces. Pfoser, Strack, and G-eb. Stumm Ges. 28735. Process of and apparatus for obtaining ammonia from solid fuel. Sachs. 28816. Purifying and clarifying water. Vollmar. 28832. Separating the readily condensable, or absorbable, constituents of hot and compressed gaseous mix- tures from the difficultly condensable, or absorb- able, constituents. Ephraim. 28941. Process for producing pressure-proof coke containing a minimum of detrimental sulphur constituents. Franck. 29033. Agglomeration of ores and metallurgical products. Buddeus. 29152. Process of and apparatus for the manufacture of explosive charges of fusible . explosives. Fair- weather. (Issler.) 29227. Auxiliary machinery for steam condensing plants. British Thomson-Houston Company. (Allgemeine Elektricitats Ges.) 29694. Steam actuating and distributing valves for direct- acting pumps. G. and J. Weir Limited, Weir, and Petermoller. 1914. 35. Rock drills and like cutting machines. Berner. 134. Electric safety lamps for mines. Kraushaar. 10180. Process of and apparatus for using steam produced with quenching hot coke or the like with water. Schondeling. 10184. Jig conveyors. H. Flottmann and Company. 10383. Process for the production of a liquid fuel and illumi- nant from tar. Markl. 10400. Means for detecting the presence of injurious gases in mines and like places. Schoeller and Company and Albrecht. 10492. Steam generators. Schmidt. 10617. Means for preventing the creeping of railway and like rails. Rambacher. 10674. Protecting device for miners’ electric lamps. Rossow. 10686. Blower devices for cleaning tubes. Schmidt’s Super- heating Company (1910). (Schmidt’sche Heiss- dampf-Ges.) 10776. Dumping receptacles. Fried. Krupp Akt.-Ges. 10957. Axle bearing for railway vehicles. Zechmeister. 11236. Method of tracing or determining admixtures or variations in the composition of gases. Haber and Leiser. 11328. Manufacture of metal plates. Schylla. 11562. Production of coke poor in sulphur. Fingerland, Jndra and Lissner. 11611. Treatment of liquid hydrocarbons. Johnson. (Badische Anilin und Soda Fabrik.) 13610. Grabs. Brown, Lenox and Company (London), and Ansell. 14614. Audible and visual signalling apparatus for use in and about mines. Sutcliffe. 16668. Hydrocarbon miners’ lamps. Goulet. 17005. Gas washers and the like apparatus. Davis. 17270. Gauges for indicating the efficiency of a steam con- denser. Scanes. 17298. Boiler furnaces. Ferguson. 18138. Divers’ helmets. Drager. 18404. Coal and rock boring machines. Berner 19933. Binding compounds for briquetting and the like. Evans and Mitchell. 20689. Winding and haulage drum. Davenport. 22012. Attachments for rock drills for supplying water thereto. Hansen. 22329. Rope pulleys. Thunhart. 23084. Coal and like conveyors. Ward. 24263. Vertical tubular boilers adapted to be heated by means of waste gases. Dietzius and Warme- Verwertungs-Ges. 24481. Steam generator. Blomquist. 1915. 1498. High - speed Francis turbines. Akt.-Ges. der Maschinenfabriken Escher, Wyss et Cie. 4761. Electrical cables, specially applicable to cables having a protective sheathing of rubber. British Insu- lated and Helsby Cables Limited, and Brotherton. 5263. Wagons. Vincent. 6050. Reverberatory furnaces. Manchester Furnaces Limited, Russell, and Lord. 6477. Furnace mouth closure for blast furnaces. Marks. (J. Pohlig Akt.-Ges.) THE ACQUISITION OF ENEMY PATENT RIGHTS. The following list of British Patents, which have been granted in favour of residents of Germany, Austria, or Hungary, is furnished in view of the new Patents Acts, which empower the Board of Trade to confer upon British subjects the right to manufacture under enemy patents, which right, when acquired, can be retained after the war, and is specially compiled for the Colliery Guardian by Lewis Wm. Goold, chartered patent agent, 5, Corporation- street, Birmingham. It is desirable in the first instance to obtain the latest particulars upon the Patents Register. If any patent listed has been assigned to a non-enemy proprietor, the law does not apply. 24788/03. Hoists; windlasses. Relates to automatic brakes, clutches, or self-sustaining gear for hoists or windlasses of the kind in which a brake ratchet wheel is clamped to the handle shaft between a disc and a screwed pinion under the pull of the load, and consists in rendering the action more certain by inserting between the shaft and the pinion, or other part gearing with the winding barrel, a spring capable of turning the shaft in the pinion with sufficient force to clamp the disc when the handle is released. F. Krupp Akt.-Ges., Germany. 6331/04. Mining. Dams and stoppings especially for use in salt mines are constructed of iron frames strengthened with ribs bolted together, and carrying hinged doors. The space between the frames and the sides of the gallery is filled with a magnesia cement, masonry, or concrete pre- pared with magnesium chloride, which swells and sets quickly. F. Grossmann, and Gewerk- 5 schaft Hedwigsburg, Germany. 8268/04. Respirators. An appliance for absorbing car- bonic acid from exhaled air, to be used in con- nection with respiration, consists of a casing lined with fabric and fitted with shelves or trays holding caustic potash, over which the air is caused to circulate. The granules of potash are placed on shelves provided with air passages, arranged on alternate sides of the casing. Sheets of blotting paper are placed under the potash to absorb any liquid formed, and perforated plates serve to hold the potash in place. In a modification the shelves have central openings, and are arranged alternately with partitions with spaces at the sides. In another modification, alternate shelves have central openings and side indentations respec- tively. J. H. Drager and A. B. Drager, Germany. 19475/04. Electric cranes; winding engines, etc. Relates to an arrangement specially applicable to cranes, winding engines, and the like, for feed- ing several motors in succession from a single dynamo, and for regulating the exciting current of the dynamo by the same controlling lever. Siemens Schuckertwerke Ges., Berlin. 20870/04. Gas manufacture. In obtaining tar and ammonia from coal gas, the gas is first cooled down to a temperature, say, of 70 degs. to 85 degs. Cent., which is above the dew point of the aqueous vapour contained in the gas. At a temperature between 75 degs. and 100 degs. Cent, nearly all the tar is deposited, this deposition taking place in a separator and a tar filter, which con- tains concentric perforated cylinders, between which crushed coke, of increasing degree of fineness, is placed. The gas is then passed into a vessel containing a weak solution of sulphuric acid through two branch pipes, termi- nating in semi-circular perforated parts. . As this acid is neutralised, fresh acid is continu- ously run in, and the solid ammonium sul- phate formed sinks into a depression, whence it is drawn off by an injector or the like to a centrifugal drier, the lye flowing back to the saturation vessel. H. Koppers, Germany. 24451/04. Impregnating wood, etc.; wood treated for pre- serving, etc. In impregnating wood and other porous materials, the air within the material to be treated is at atmospheric pressure, and the pressure of the impregnating liquid is not more than four atmospheres. The material is then subjected to the vacuum treatment as many times as is desired, and the material may also be subjected to a strong air pressure, and then to the vacuum. Hulsberg and Company, Ger- many. *** Copies of any of the above specifications can be supplied at the price of Is. post free. GOVERNMENT PUBLICATIONS. *** Any of the following publications may be obtained on application to this office at the price named post free. Trade and Consular Reports, 1914 : Seychelles, 2|d.; Italy Finances, 2|d.; Zanzibar, 3|d.; Greece, Salonica, 1913, 2£d. Bills, 1915 : Trading with the Enemy Amendment, Id.; Customs War Powers, No. 2, Id.; Execution of Trusts: War Facilities, Id.; Special Acts Extension of Time, Id.; PRICE OF COAL LIMITATION, l|d.; Trade with the Enemy Bill : Lords’ Amednments, Id. Foreign Trade and Commerce Accounts up to July 16, 1915, 5d. Statutory Rules and Orders, 1915 : (No. 633), Weights and Measures Order, l|d.; (No. 637), COAL MINES EXPLOSIVES ORDER, 3/7/15, l|d.; (No. 641), Muni- tions of War Proclamation, IJd.; Ministry of Munitions Regulations, Id. Board of Education : Regulations for Technical Schools, 1915, 3d. PUBLICATIONS RECEIVED. Halifax : A Commercial and Industrial Centre, 1915. Edited by G. P. Wadsworth. London: Sells Limited. Price, 2s. 6d. “ Journal of the Western Society of Engineers” (Vol. 20, No. 5), May, price 50c.; “ Bulletin of the Imperial Insti- tute ” (Vol. 13, No. 2), April-June, price 2s. 6d.; ‘‘Year Book of the Michigan College of Mines, 1914-15 : Announce- ment of Courses for 1915-16 ”; “ Proceedings of the South Wales Institute of Engineers ” (Vol. 31, No. 3), price 5s.; ‘‘Transactions of the Institution of Mining Engineers” (Vol. 49, Part 3), price 3s.; “ How Belgium is Fed,” by W. C. Edgar (The National Committee for Relief in Belgium). Grimsby Coal Exports. — Returns for the week ending July 23 show that the coal exported from Grimsby was as follows:—Foreign: To Dieppe, 580 tons; Gefle, 2,061; Havre, 638; Honfleur, 507; Rotterdam, 536; Skein, 800; Treport, 455; and Trondhjem, 1,322 tons. Coastwise: To Gravesend, 210 tons; and London, 1,692 tons. Total, 6,899 tons foreign, and 1,902 tons coastwise. Total for corre- sponding week last year was 18,532 tons foreign, and 208 tons coastwise. Hull Coal Exports.—The official return of the exports of coal from Hull to foreign countries for the week ending Tuesday, July 20, 1915, is as follows :—Algiers, 249 tons; Amsterdam, 816; Archangel, 330; Christiania, 1,593; Dieppe, 751; Fecamp, 1,588; Gefle, 1,821; Dunkirk, 398; Harlingen, 1,693; Havre, 629; Honfleur, 624; Nakskov, 1,246; Oran, 1,000; Paimpol, 274; Rouen, 28,980; Rotterdam, 1,750; Stege, 1,748; Stockholm, 619; Soroka, 4; Treport, 622— total, 46,735. The above figures do not include bunker coal, shipments for the British Admiralty, nor the Allies’ Govern- ments. Corresponding period, July 1914—total, 99,739 tons. Mine Managers’ Examinations.—The following is a list of successful candidates at the examination held by the Board for Mining Examinations on May 26 and 27, 1915 :— For a first-class certificate of competency as manager of a mine : Messrs. M. T. Adams, C. E. M. Bergna, C. Brown, H. S. Calder, E. Cartledge, J. W. Chambers, W. Chapman, G. A. Charlton, H. Craven, H. Crawford, I. W. Cumber- batch, A. S. Dallas, D. Darlington, J. P. Davies, T. Davies, A. Dews, J. Edwards (Sheffield), J. W. Elliott, R. Evans, A. Fleming, H. Flesher, J. G. Garrett, W. F. Graham, T. Green, F. A. Hale, J. S. Hayes, R. Henderson, A. Hinch- liffe, W. Hulse, R. Imrie, W. J. Jones, P. Littlewood, J. H. Lloyd, J. E. J. Marshall, R. L. Meek, L. Millar, E. W. Oswald, A. Paterson, G. Phillips, L. Phillips, G. A. Sellers, C. Simpson, A. Smith, P. R. Smith, A. P. Thomson, P. Walker, J. Whitticombe, W. Wightman, A. Wilson, J. Wilson, S. Wood, W. H. Wright. — For a second-class certificate of competency as under-manager of a mine: Messrs. E. Anderton, N. S. Auckland, G. Barke, W. Bartley, R. Bell, D. Bloor, G. Boam, W. Bond, junr., D. Bott, J. D. Bowdler, T. J. Bowen, G. A. Bower, W. Bretton, J. Brier, R. W. Brown, W. Brown, A. T. Burnet, J. Burt, P. Chalmers, W. Clarke, C. Coates, E. Cobb, W. Cooper, T. W. Corker, W. H. Cotton, A. W. Crow, J. H. Cumberbatch, W. Cummings, H. Cusworth, J. E. Davenport, D. T. Davies, H. G. Davies, L. Davies, M. H. Davies, T. Dibble, J. Dodds, J. J. Douglas, J. T. Dronfield, D. Easton, W. Edwards, T. Evans, junr., T. J. Evans, S. Farns- worth, W. H. Feason, W. E. Fisher, J. Gibb, J. G. Gill, M. H. Gill, J. Gillis, J. Gladstone, W. Graham, R. Gray, J. A. Grove, J. Hankey, W. Hawley, A. E. Hazell, J. Henderson, J. S. Heslop, J. B. Hockaday, W. Holdcroft, T. G. Holder, junr., W. Hudspith, J. Hunter, G. Hutchin- son, junr., G. Ingham, F. D. Jenkinson, J. Johnson, A. Jones, W. S. Jones, R. King, D. Lavin, junr., W. H. Lee, R. Lewis, L. W. Limb, J. Lomax, B. Lord, E. Lumb, H. Lumb, W. M. Lumsden, J. W. Lyon, T. H. I. Maddox, J. F. Martin, J. McBride, R. McCulloch, P. Mclnnes, H. McLiver, E. Milburn, B. Milner, A. Moore, A. Morgan, T. G. Morgan, W. S. Morgan, W. Moseley, A. Mosley, A. Myers, W. S. Ogden, M. Parrott, B. Pritchard, J. C. Ralph, T. H. Richards, F. Robinson, E. Rolfe, J. Scott, E. B. Sellars, R. S. Shepherd, G. Sketchley, H. Smith, Jesse Smith, John Smith, J. Stirrat, P. Syme, A. M. Tripney, T. H. Vaughan, sent., H. Walker, T. Walker, junr., A. Wallace, F. Wells, J. Welsh, W. Wharmby, A. White, J. E. Wilkinson, G. Williams, R. Wilson, J. Woodland, W. Wright, G. Yeardly.—For a certificate of qualification as surveyor of mines : Messrs. P. Barclay, M. Berman, S. H. Berry, D. R. Campbell, H. G. Cobb, F. Cowey, F. G. Cutts, D. G. Davies, D. S. Downie, D. J. S. Edmunds, S. E. Evans, V H Evans, J. Gibson, L. Hagon, H. Hinchliffe, A. Hough, D. R. Jones, T. King, B. Lees, T. H. Liptrot, E. B. Lonie, J. Marshall, J. N. McLaren, T. H. E. Morgan, J. Mort, A. L. Morton, J. T. Pickford, T. J. Powell, C. J. Smith, T. Stephenson, J. S. Weir, G. Yorath.