910 THE COLLIERY GUARDIAN May 3, 1918. coil circuit, arranged to check the flow of current in the coil circuits quickly causing the controlled switches to open very quickly and suppress the arcs at the circuit inter- rupting contacts. (Four claims.) 113392. Improvements Relating to Fuel Economisers. G. B. Chance, Wood-street, Wollaston, Stourbridge.—This invention has for its object to provide an improved fuel economiser for domestic grates, of the type in which a fireclay fuel support adapted to be placed on the firebars of a grate is formed with a transverse flue extending from the front to the back of the support, air passages being- arranged between the said flue and the outer surfaces of the support. The invention comprises a support having corrugated outer surfaces terminating in a ridge extending from the front to the back of the support. (Two claims.) 113399. Improvements in Conveyors. H. J. Spinney, 36, Temple-grove, Golders Green.—This invention relates to conveyors of the jigging or shaking type, and it consists in imparting to the trays, pans, or the like, a reciprocating motion in a direction other than parallel with the line or plane of said trays, pans, or the like, so that said trays, pans, or the like, move upward as well as forward in one direction, and downward as well as backward in the other direction, the object being to increase the conveying motion, and therefore the efficiency of the conveyor. This end is attained by suitably inclining or curving the means employed to control the path of motion of the trays or pans. A suitable construction comprises inclined and preferably slightly curved paths with which runners engage, the preferred construction being to fix the paths on the track and the runners on the trays, pans, or the like, said paths and runners being so arranged as to confine the motion strictly to said paths and to reduce the sliding friction to a minimum. As the conveying action depends to a considerable extent upon the coefficient of friction between the material to be conveyed and the face of the tray, pan, or the like, said faces may be roughened in order to increase the coefficient of friction by lining said trays, pans, or the like, with wire mesh, expanded metal, or the like, or by corrugating the bottoms of the trays or pans. In order to apply this invention to existing plants, the inclined paths are so made that they can be fixed to the ordinary rails by means of clamps. (Six claims.) 113506. Improvements in Miners’ Electric Safety Lamps. 0. Oldham, Hyde-road, Denton, near Manchester. —The invention has for its object to provide a miner’s electric lamp with an improved, simple and effective cut- out or circuit breaking device whereby, in the event of fracture of the glass bulb thereof, the electric circuit between said bulb and the source of electricity is auto- matically and instantly broken, thus ensuring greater safety of the lamp, and increased immunity from danger in respect of explosive or highly inflammable gases, liquids or substances surrounding or in close proximity to the lamp, inasmuch as it is impossible for the gases, liquids or substances to be ignited. Fig. 1 is a sectional elevation of a suitable construction of the improved cut-out, the lamp bulb being in position and intact, and the circuit closed. Fig. 2 is a detail plan, and- fig. 3 is a partly sectional elevation showing the parts in their positions when the lamp bulb has broken and the circuit is auto- matically opened. In the forms shown, the bulb a screws into a metal or other holder or socket b secured by screws c to an insulating disc d carrying two terminal contact members e, which disc is fixed by screws f within a cap g adapted to be secured within or upon the upper end or head of the battery casing or body, not shown. The socket b and/or the disc d is or are fitted with one or more spring-like and/or spring-pressed contact members h, and a glass, earthenware, metal, ebonite or other sleeve or tube i is fitted over said socket and adapted to pro- ject through the cap g, a helical spring j preferably being interposed within the sleeve or tube and between the outer ends of the socket and sleeve or tube to assist in the return action hereinafter described. As the lamp bulb a is oemg screwed into, place within the socket b the bottom I of the glass of the bulb engages with the upper end of the sleeve i, fig. 1, and forces the sleeve i or ix down against the action of the spring contact member or .members h and the helical spring /, and the sleeve in turn presses said contact member or members into circuit closing position, fig. 1, thus the action of fitting the bulb in position serves to place the contact member or members in operative position, in which posi- tion said member or members is or are maintained by said sleeve whilst the bulb and the sleeve, fig. 1, remain intact, the sleeve or the sleeve and ring being sup- ported q,nd retained by the glass of the bulb. If the bulb a should be fractured, the support for the sleeve i, fig. 1, is thereby removed, and said sleeve is released to be moved by the action of the spring or springs, thus allowing the contact members or member h to move into inoperative position, fig. 3, and break the circuit at this point. If the sleeve i or i1 is made of fracturable material and is broken in conjunction with or independently of the bulb a, the contact member or members h would be likewise released to break the circuit. Again, if the ring k is broken the circuit would be similarly broken. The outward move- ment of the sleeve i or P may be limited by means of a flange m formed on its inner end and adapted to engage with the under side of a flange n on the cap g. The spring contact member or members may be adapted, when pressed down, to co-operate with one or more rigid contact members, or the sleeve may be adapted to bridge.two or more contact members, or to cause an independent element to do so. In the construction shown, the contact member h is of spring metal and pressed upwards by means of a spring o, and said member carries a spring p which, when the member is in circuit closing position, engages to top of one of the terminal contacts e to close the circuit, as shown in fig 1, and when the member is in inoperative position, is moved out of engagement with said terminal contact to break the circuit, as indicated in fig. 3. The central terminal q of the lamp bulb a engages a spring pressed finger r electrically connected to the other terminal contact e. (Five claims.) 113718. Improvements in C entrifugal Compressors. The British Thomson-Houston Company Limited, 83, Cannon- street,. London, E.C. (a communication from the General Electric Company, Schenectady, New York).—The present invention relates to pulsation preventing means for centri- fugal compressors, such as air compressors. The object of the invention is to provide an improved arrangement for preventing pulsations in compressors, which arrangement is automatic in operation, simple to build, and easy to instal, either on new machines or those already in use. The invention is particularly intended for use in connec- tion with compressors equipped with constant volume governors. (Two claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. April 22 to Tl (inclusive). [Note.—Applications arranged alphabetically under the names of the applicants (communicators in parentheses). A new number will be given on acceptance, which will replace the application number.] Abben, H. F. A. W. H. Rotary engines, etc. (6819) Anderson, W. Process of obtaining oil from tar or pitch. (7626) Bancroft, F. J., and Hansford, J. B. Retorts, and methods of working them. (7131) Bell, L. Carburettors for coal or water gas. (6749) (Blaw-Knox Company.) Open hearth furnaces, etc. (7000) British Thomson-Houston Company (General Electric Company) Electric motors. (6761) British Thomson-Houston Company (General Electric Company). Elastic-fluid turbines. (6900) British Thomson-Houston Company (General Electric Company). Elastic-fluid turbines. (6975) British Westinghouse Electric and Manufacturing Com- pany. Air and gas pumps. (6830) British Westinghouse Electric and Manufacturing Com- pany. Heat conserving apparatus. (6934, 6935) Brown, A. W. Condensers and coolers. (6747) Brown, R. J. Wainwright-, and Bullock, P. W. Pumps. (6839) \ Campbell, J. A. Cooling superheated or high-temperature steam, and valve mechanism therefor, for steam tur- bines, etc. (6995) Champion, H. Rotary engines. (6961) Chopin, A. L. Pneumatic hammers. (6940, 6941) (Cleveland Trust Company.) .Distilling petroleum, etc. (6921) Doyle, T. E. Raising and drying peat. (6801) Dunker, L. Filters for air, etc. (6763) Edmonds, J. W. Compounds for treating fuel. (6925) (Fuel Saving Company.) Slag pans for fine fuel burners. (6920) (Fuel Saving Company.) Fireboxes for burning fine fuel. (7060) Goodhead, B. Internal-combustion engines. (7065) Harger, J., and Helps, G. Manufacture of liquid fuel fBBgjfrom de-hydrated tar. (6752) Holland, W. T. Portable propelling means for barges, etc. (6798) Holmes, D. W., and Lewis, H. J: Safety appliance for mine cages, lifts, etc. (6905) Hone, G. J. Grabs. (6906) Houston, P. T. Internal-combustion engines. (7090) Johnston, J. S. Pumps. (7067) Jordan, H. S. Rotary engines, etc. (6819) Kerr, T. A. Steam condensers. (6782) Klein, C. A. Process for dehydration of tar. (7032) Lanchester, F. W. Heat engines for production of motive power. (6857) Lang, C. E. Internal-combustion turbines. (6904) Langwell, H., and Power Gas Corporation. Treatment of peat for obtaining useful products. (6777) Law, L. W. Internal-combustion engines. (6847, 6850, 6852) Leeming, J. A. Brackets for aerial ropeways. (6919) McCain, O. A., and Padgett, E. A. Pumps. (7067) McMaster, A. A. and E. Feed-water heating. (6773) Morgan, H. Coal face conveyor. (7093) Pill, T. H. Compressed air, etc., drills. (6891) Preston, J. T. E., and Simon-Carves Limited. Means for regulating pressure in gas mains of coke ovens, etc. (6812) Reynolds, A. Steam generating plant. (7068) Roe, J. P. ' Endless conveyors. (7003) Scanes, A. E. L. Air and gas pumps. (6830) Small, C. W. Internal-combustion engines. (7065) Smallwood, A. Furnaces. (6804, 6805) Smith, V. Water-tube steam boilers. (7023) Spencer, R. P. Internal-combustion engines. (7133) Thompson, W. J. Water-tube steam boilers. (7023) Thrush, A. W. Propulsion of canal barges, etc.,, by internal-combustion engines. (7021) Vickers Limited. Internal-combustion engines. (7133) Wallace, J. C. Internal-combustion engines. (6911) Westwood and Company, J. Grabs. (6906) White, J. Means for promoting circulation in steam boilers with fire tubes. (6855) Willock, Reid and Company. Compressed air drills. (6891) Wood, W. R. Drying fuel supplied to furnaces, etc. (6779) Complete Specifications Accepted. (To be published on May 16.) [Note.—The number following the application is that which the specification will finally bear.] 1916. 5442. Foley, C. B. Electric induction furnaces. (114853) 1917. 54. Oilmans, J. Processes and apparatus for obtaining lower from higher carburets of hydrogen. (108454) 1534. Drakes Limited, and Drake, W. A. Regenerative retort settings. (114859) 3162. Feeny, V. F. (Oldfield, L. W.). Rotary internal- combustion engines. (114862) 3327. Pease, E. L., Bell, A., and British Still Tube Com- pany. Tubular heat interchanging apparatus. (114863) 3600. Lewis, A. Governor for use with sound recording and reproducing machines. (114864) 3731. Brush Electrical Engineering Company (Svenska Turbinfabriks Aktiebolaget Ljungstrom). Tur- bines. (104878) 3911. Lefevre, H. A. Hot air engines. (105068) 5348. Smethurst, H. Spraying or atomising apparatus. (114883) 5432. Fay, H. Anti-priming devices or baffle plates for evaporators, steam generators, steam separators, or the like apparatus. (114888) 5841. Thornton, A. A. (Saunders Motor Power Company). Rotary engine. (114904) 5846. Kelly, T. D. Steam or vapour pressure engines and vapour or air compressors. (114905) 7304. Varley, G. P., and Smith, P. Fans or blowers. (114926) 7611. Thomas, W. L., and Edwards, T. Two-stroke-cycle internal-combustion engine. (114930) 8193. British Thomson - Houston Company (General Electric Companv). Centrifugal compressors. (114935) 8269. Porteous, H. B., and Allen, P. T. Coke ovens of the horizontal or approximately horizontal flue type. (114936) 8337. Perkin, F. M., and West, J. Destructive distilla- tion of carbonaceous materials. (114937) 8562. Clench, E. C. S., and Aster Engineering Company. Internal-combustion engines. (114939) 11464. Harbord, F. W. Furnaces for roasting ores. (114953) 11535. Bloxham, A. G. Zellstofffabrik Waldhof). Roasting pyrites, ores, or the like, in shelf burners. (114954) 12288. Gardner, L. Liquid fuel burners. (114961) • 13694. Yeadon, J. A., and Whitaker, T. System of car- bonising coal. (114971) 16988. McDougall, A. Hydraulic rotary engine. (114991) 1918. 3657. Wade, F. E. Internal-combustion engines. (115011) Complete Specifications open to Public Inspection Before Acceptance. [Note.—The number following the application is that which the specification will finally bear.] 1917. 11212. Gasoline Corporation. Art of distilling hydro- carbon oils. (115014) 1918. . 4545. Gayley, J. Methods and apparatus for sintering ores. (115023) 5811. Gontermann, W. Thomas process for the produc- tion of steel. (115027) GOVERNMENT PUBLICATIONS. *** Any of the following publications may be obtained oh application at this office at the price named post free. Statutory Rules and Orders, 1918 : (No. 324) Mines. Coal Mines Act. The Safety Lamp Order. March 9, 1918, price 6d. PUBLICATIONS RECEIVED. “ The Year-Book of the Scientific and Learned Societies of Great Britain and Ireland,” compiled from Official Sources; Thirty-fourth Annual Issue (London : Charles Griffin and Company Limited, Exeter-street, Strand, W.C. 2), price 9s.; “The Empire Municipal Directory and Year Book, 1918 ” (36th year of publication) (London: The Sanitary Publishing Company Limited, 8, Bream’s Buildings, E.C. 4), price 5s. net; “ Industrial Management—The Engineering Magazine ” (Vol. 55, No. 4), April 1918, price 25c.; “The Journal of Indus- trial and Engineering Chemistry ” (Vol. 10, No. 4), April 1, 1918; “Commerce—The Official Organ of the Sydney Chamber of Commerce (Incorporated) (Vol. 1, No. 1), new series, February 1918; “ Syndication in the Brass Industry,” by Howard F. Smith (Director, Smith and Davies); Institute of Metals : “ Presidential Address by Prof. H. C. H. Carpenter, M.A., etc.” (London: Published at the offices of the institute, 36, Victoria- street, S.W. 1; “Transactions of the Mining Institute of Scotland (Vol. 40, part 4) (London : Published at the offices of the institution, Albany Buildings, 39, Victoria-street, Westminster, S.W. 1) ; “Russia—Britain’s Great Opportunity!” (Vol. 2, No. 5), March 1918, price 6d. net; “The Beama Journal” (Vol. 4, No. 2), April 1918, price Is.; “ The Indian Journal of Medical Research ” (Vol. 5, No. 3), January 1918, price 2R.; “The Journal of the Chemical, Metal- lurgical and Mining Society of South Africa ” (Vol. 18, No. 8), February 1918, single copies 3s.; “The Journal of the South African Institution of Engineers ” (Vol. 16, No. 8), March 1918, single copies 2s.; University of Illinois Bulletin No. 101 : “ Comparative Tests of Six Sizes of Illinois Coal on a Mikado Locomotive ” by Edward C. Schmidt, John M. Snodgrass, and Otto S. Beyer, Jnr., price 50c.; “ Transactions of the Institution of Mining Engfneers ” (Vol. 54, part 5), April 1918 (London : Published- at the offices of the Institution, Albany Buildings, 39, Victoria-street, Westminster, S.W. 1), price 6s.; Iron and Steel Institute (Annual Meeting, May 2-3, 1918) : “ The Protection of Iron with Paint against Atmospheric Corrosion,” by J. Newton Friend, D.Sc., Ph.D., F.I.C.; “ Fuel Economy in Blast- Furnaces,” by T. C. Hutchinson; “ The Importance of Coke Hardness,” by G. D. Cochrane. Gas for Motors.—An interim report has been issued by the Inter-Departmental Committee appointed by Mr. Walter Long last November to consider the employment of coal gas in substitution for petrol and petroleum products as a source of power, especially in motor vehicles. The report is favourable. Authority is asked for experiments and tests by an expert sub-committee on portable gas- generating apparatus and high-pressure containers, as well as on the questions relating to liquefaction, absorption, and enrichment, and on improved methods of securing the correct admixture of air with the gas. Fuel Production in Italy.—The Italian Government has issued a Decree with the object of increasing the output of fuel. The Decree gives the State full control over the lig- nite deposits already worked, and of the undeveloped lignite areas, with a view to prospecting and developing these latter on an extensive scale. It also fixes the amount of compensation to landowners and tenants in cases of expropriation. To those who possess the requisite know- ledge, plant, etc., for mining, concessions will be granted for mining operations, the digging of peat, and the extrac- tion of mineral oils and natural gas. In cases where the landowner has. invited mining operations, the proceeds of such undertaking will be shared between the operators and the owner. A royalty extending over a period of not more than 30 years is to be paid for mining rights over lignite, anthracite, and bituminous shales, and for peat cutting1; also an extraction tax of not over 50c. (5d.) per barrel of crude oil, and not over 25c. (2|d.) for 1,000 cu. m. of gas will be imposed. The National Fuel Commission is endowed with powers to advance capital for plant, etc., to companies or individuals for this intensive fuel pro- duction, and will further the interest of mining organisa- tion by encouraging administrative consolidation.