960 THE COLLIERY GUARDIAN May 10, 1918. wood spirit, acetic acid, and creosote, by separate distil- lation, the latter in smaller quantities. 114085. Reciprocating Trough Conveyors. S. Nettleton, National Bank of South Africa Limited, Market-street Branch, Johannesburg.—The present invention relates to actuating mechanism for reciprocating trough conveyors of the kind in which harmonic motion due to a crank is converted by link mechanism to cause the velocity of the trough on the forward stroke to be increased gradually to the maximum near to the end of the stroke and then rapidly fall to -zero, the operation being reversed on the return stroke. The object is to provide a simple mechanism for this purpose, and one suitable for actuating a stop conveyor. (Three claims.) 114131. Multi-Stage Compressing Apparatus of the Ejector Type. W. J. Mellersh-Jackson, of the firm of Haseltine, Lake and Company, chartered patent agents, 28, Southampton Buildings, London, W.C. 2 (communication from C. H. Wheeler Manufacturing Company, Eighteenth - street, and Leigh - avenue,. Philadelphia). — This invention relates to apparatus for compressing fluid such as air, gas, vapour, or a mixture of any of them, and involves the ejector principle in accordance with which a motive fluid, such as steam under pressure, is allowed to expand and entrain the fluid to be compressed, the mixture of the fluids being delivered into a diffuser and discharged therefrom at a pressure higher than the initial pressure of the fluid to be compressed. Where the elastic fluid is to be compressed to very much higher pressure, multi-stage ejector apparatus may, it is known, be employed, an earlier stage partially raising the pressure of the fluid to be operated upon, and a later stage further increasing its pressure. The invention resides in multi-stage apparatus comprising separate ejector structures and connections extending between them in which the first stage there is employed any suitable type of ejector apparatus, while in a second stage there is employed ejector apparatus which comprises an expansion nozzle delivering a jet of motive fluid in the form of a circular sheet or disc, hollow cone, or any other surface of revolution delivering into a surrounding or aligned diffuser, whereby in such second stage a .relatively short jet of large entraining surface is available for raising the fluid to be operated upon to high pressure. The invention resides also in multi-stage apparatus of the character above referred to in which in the first stage there is employed ejector apparatus comprising a plurality of expansion nozzles whose throats are of fixed area and whose passages are fixed in size. The invention resides also in multi-stage apparatus of the character above referred to in which the fluid delivered by the first stage is divided into stream flowing to opposite sides of the motive fluid jet of the second stage. A further feature of the invention resides also in multi-stage apparatus of the character above referred to in which in the first stage the area of the outlet or outlets of the nozzle or nozzles is less than or equal to the area of the associated diffuser passage at its throat, while in the second stage the area of the nozzle outlet is greater than, or equal to, the area of the associated diffuser passage at its throat. (Seven claims.) 114170. Improvements in Pumps. G. Constantinesco, “ Westoe,” Stanley-avenue, Alperton, Middlesex.—This invention relates to piston pumps, and has for its object to construct a pump capable of working at very high speeds. In pumps as heretofore constructed of the piston type, difficulties are experienced in working at very high speeds, one of the main troubles being that the valves, especially the suction valve, fail to operate quickly enough. The invention consists in a valveless pump comprising a piston working for a part of its stroke inside, and for a part of its stroke outside on the suction side of a cylinder which is connected to a pipe of sufficient length to allow the inertia of the liquid expelled from the pump to operate to draw in more liquid when the piston is out of the cylinder. (Two claims.) 114200. Expansion .Gear for Duplex Steam Pumps. G. Honegger, Zollikon, near Zurich, Switzerland.—In duplex steam pumps as heretofore ’known, reversal at full stroke of one cylinder is effected by the piston rod of the other cylinder, while the control of expansion is usually derived from the piston rod of the same cylinder. Duplex steam pumps are known in which a piston of one pump operates the slide valve of the other pump and vice versa, each valve controlling an expansion valve. In such pumps however, the two pistons are connected with each other by a crank. The present invention has for its object to provide a reliable valve-gear which effects control of both the reversal and the expansion in one cylinder, by actuating the distributing valve by the piston rod of the other cylinder. According to this invention, the gear transmits the motion of the tail rod of one cylinder to the distributing valve of the other cylinder, by means of a carrier rotatable about a fixed axis, this carrier causing distribution of steam, so that the mid-stroke position of the piston of one pump brings about the reversal of the other, and thus initiates the cutting-off of the steam for the first cylinder, steam in the first cylinder being cut off normally at an admission of about 65 per cent. One advantage of this system is that it dispenses with com- pression space, so that double steam passages are no longer required. This results in considerable saving of steam and at the same time in a simpler construction of the cylinder. A second advantage is obtained according to the present invention, by cutting off steam at 65 per cent, admission, thus causing the piston to accomplish the remainder of the stroke under the action of steam expan- sion. For, as compared to the heretofore known systems of full stroke admission, the design now proposed effects considerable saving of steam. As regards expansion control, this invention effects it by a simple slide or oscillating valve to which is imparted an additional velocity in the direction of its motion, while heretofore, where only one slide valve was used, this had to be moved both length- wise and laterally, and in cases in which such complications were not desired, three or four slide valves have had to be arranged. By reason of their complicated design, such gears are both costly and unsafe in working. (Eight claims.) 114222. Regenerators for Coke Ovens. E. C. R. Marks, 57 and 58, Lincoln’s Inn Fields, London, W.C. (a com- munication from the Societe Franco-Beige de Fours a Coke (Societe Anonyme), of Nos. 100 and 101, Avenue de la Toison d’Or, Brussels, Belgium, manufacturers).—This invention has for its object to provide an improved arrange- ment and construction of regenerators and admission and exhaust flues for the heating elements and products of com- bustion in a battery of coke ovens. . This improved arrangement and construction is more particularly designed to allow of heating at will by means of “ live ” or rich gas drawn direct from the coke ovens, or by means of a reheated poor blast furnace gas, or reheated poor producer gas, or the combined heating by means of “live” gas and reheated poor gas. It consists essentially in the use of two sets of . regenerators situated respectively under each half of the battery of ovens, and each comprising a central gallery filled with chequer-work and provided with transverse partitions so as to form a row or regenerators arranged side by side, and two flues extending the whole length of the battery on each side of the row of regenerators. The regenerators communicate alternately by pipes or passages, singly or in groups respectively with one and the other of the two flues. These two flues serve both on the one hand for exhausting the burned gases during the period of reheating the chequer-work of the regenerators, and on the other hand for the supply of air to be reheated during the period of admission of the live gas in cases where the latter is used. In cases where reheated poor gas is used, one of the flues serves for supply- ing the air and the other for supplying the poor gas. (Six claims.) 114290. Power Generating Devices. J. Peterson, Central Building, Seattle, U.S.A.—This invention has for its principal object to provide an improved and novel device for generating power; to provide novel arrangement and combination of hubless toothed gears and grooved friction wheels which constitutes an endless trasmission train. Still another object is to provide improved and novel rack and pinion means for applying power to the transmission train. (Three claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. April 29 to May 4 (inclusive). [Note.—Applications arranged alphabetically under the names of the applicants (communicators in parentheses). A new number will be given on acceptance, wrhich will replace the application number.] Abrahams, E. Goldsmid-, and Parker, J. W. Generation, from incandescent carbonaceous material, of fuel gas for internal-combustion engines, and apparatus there- for. (7435) Alcock, A. E., and Fowells, J. W. B. Sinking into the ground, or withdrawing from same, tubes, cylinders, etc. (7190) Alcock, A. E., and Fowells, J. B. Apparatus for driving or withdrawing screw piles, sinking or withdrawing tubes, cylinders, piles, etc. (7191) Anderson, A. E., and Bennett, E. S. Rotary pumps. (7371) Atkinson, J. S. Charging furnaces. (7294) Aubert, A. M. Furnaces. (7473) (Barker, A. E., and Hubbard, S. E.) Stope, etc., con- veyor. (7345) Bosch Akt.-Ges., R. Double-current dynamo machines. (7313) Brown, J. S. Method of diminishing air pressure in exhaust steam condensers. (7155) Brundrit, J. Steam generators. (7522) Buxton, G. A. Cutter-bars of coal cutting machines. (7280) Clerget, Blin, et Cie. Internal-combustion engines. (7247) Compagnie Generale Electrique. Rope haulage systems. (7324) Corthesy, J. H. Distillation of liquid hydrocarbons. (7315) Cumbo, E. Aerial transporters. (7385) Elgin Gas Motor Company.. Internal-combustion engine. (7235) Faulkner, V. C., and Saniter, E. H: Means for holding furnace, etc., doors in tightly closed position. (7271) Forth Engine and Motor Works, and Paynter, W. L. Means for heating a steam generator, boiler, etc. (7250) Foster, W. J. Turbines. (7412) Fullerton, Hodgart and Barclay. Air compressors. (7422) Harvey, E. W., and Harvey Gas Furnace Company, E. W. Regenerative or recuperative furnace instal- lations. (7529) Howden and Company, J., and Hulme, J. H. Draught installations for boilers. (7363) Hoyle, J. K. Rope couplings. (7283) Hoyle, J. K. Aerial transporters. (7284) Jones, E. Internal-combustion turbine engine. (7438) Lamberty, P. Manufacture of briquettes. (7528) Lanchester, F. W. Internal-combustion engines. (7184) Lanchester, F. W. Rotary blower or exhauster, and method of manufacturing cylinders therefor. (7219) Leadbeater, J. W. Means for drying and carbonising peat, etc. (7415) Leek,. A. E., and Simpson, D. H. Clinkering arrange- ments. (7146) McGregor, W. Air compressors. (7422) Moren, H. Internal-combustion engines. (7248) Parsons, Sir C. A. Dynamo-electric machines. (7181) Portham, R. S. Steam-turbine installations. (7459) Robinson, C. J., and Robinson and Son, T. Suction dust collectors, etc. (7407) Rosen, J. Dynamo-electric machines. (7181) Roxburgh, A. B. Means for heating a steam generator, boiler, etc. (7250) Stein and Atkinson. Charging furnaces. (7294) Stevenson, W. J. Fuel. (7263) Stobart, W. R. Washers for coal, etc. (7246) (Stokes, S. F.) Utilising crude oil for heating, etc." (7317) Thomas, G. H. Internal-combustion engines. (7222) Thuman, F. Apparatus for feeding fuel, etc., to gas producers, etc. (7532) Tonge, J. Hydraulic presses and pumps for breaking down coal, etc. (7267) Wilde, A. H., and Wilkinson, G. S. Internal-combustion engines. (7222) Wright and Eagle Range Limited, J., and Yates, H. J. Tilting crucible furnaces. (7457) Complete Specifications Accepted. (To be published on May 23.) [Note.—The number following the application is that which the specification will finally bear.] 1916. 3210. Bennis, A. W. Process for the pneumatic convey- ing or transporting of material and apparatus therefor. (115043) 8150. Kesselring, F. Continuous current dynamos. (115045) 11575. Riedel, A. Method of operating gas generators. (101220) 1917. 1089. Macfarlane, G. T. Winches. (115054) 5549. Pochin, R. F., and Pochin, H. S. Screening plant for. dealing with metalliferous ores and other substances. (115065) 5567. Thuman, F. (Evans, O. B.). Manufacture of toluol. (115066) 5627. GWynnes Limited, and Breeze, J. F. Centrifugal pumps and fans. (115070) 5815. Davis and Son, J., and Davis, W. H. Miners’ electric lamps. (115084) 5817. Frost, C. R. B., and Thorne, G. Internal-combus- tion engines of the tandem-cylinder type. (115085) 5827. Seilens, F. C. Chain grate or like travelling stokers. (115086) 5866. Robinson, W. Method of, and means for, supply- ing feed-water to steam generators. (115092) 6094. British Thomson-Houston Company (General Elec- tric Company). Systems of electric motor con- trol. (115099) 6121. Middlesboro’ Slag Company, and Major, J. L. Manufacture of slag bricks. (115100) 6273. Taylor, W. H., and Shaw, C. Device for separat- ing water, oil, or impurities from steam or air. (115103) 6274. Taylor, W. H., and Shaw, C. Device for separat- ing oil, moisture, and impurities from exhaust steam or air. (115104) 6765. Paton, J. Machines for pickling iron and steel plates, and the like. (115111) 6802. British Thomson-Houston Company (General Elec- . trie Company). Phase conversion of alternat- ing electric currents. (115112) 7326. British Thomson-Houston Company (General Elec- tric Company). Centrifugal compressors. (115120) 9333. Shiner, A. E. Rotary pumps. (115137) 9564. Snow, C. J. Condensers. (115141) 9647. Stanley, G. E. Two-stroke-cycle internal-combus- tion engines. (115143) 1561'6. Steinmann, W. Automatic apparatus for return- ing water of condensation to a boiler, and for like purposes. (115190) 16469. Soc. Franco-Beige de Fours a Coke. Horizontal coking ovens. (113779) 17607. Reisert Ges., H. Process of softening water. (112127) 18526. Thornton, A. A. (Saunders Motor Power Com- pany). Rotary engines. (115209) 1918. 472. Cornet, A., and Humblet, L. Generator for mixed steam and combustion products. (115211) 966. Burdens Limited, Burdon, W. M., and Burdon, M. M. Oil-gas and other gas furnaces. (115214) 2223. Baxter Limited, W. H., and Baxter, W. H. Machinery or apparatus for crushing, etc., stone, ore, and like materials. (115218) 5095. Gaunt, J., Brookfield, D., and Tylor and Sons, J. Means for preheating the charge in crucible and like furnaces. (115222) GOVERNMENT PUBLICATIONS. *** Any of the following publications may be obtained on application at this office at the price named post free. Munitions of War. H.M. Petroleum Executive Gas Traction Committee. Interim Report. Principal Pro- visions. Price 2d. Committee on Commercial and Industrial Policy. Interim Report on Certain Essential Industries; Cd. 9032. Price 3d. Interim Report on the Importation of Goods from the Present Enemy Countries after the War; Cd 9033. Price l^d. Interim Report on the Treatment of Exports from the United Kingdom and British Overseas Possessions and the Conservation of the Resources of the Empire during the Transitional Period after the War; Cd.9034. Price 3d. (London : Published by His Majesty’s Stationery Office). PUBLICATIONS RECEIVED. “ Mineral Enterprise in China,” by William F. Collins (London : William Heinemann, 21, Bedford-street, W.C. 2), price 21s. net; “Journal of the Royal Statis- tical Society ” (Vol. 81, Part 2), March 1918 (London : Royal Statistical Society, 9, Adelphi-terrace, Strand, W.C. 2), price 5s.; “The Journal of the Manchester Geographical Society ” (Vol. 33, Parts 1-4), April 1918; “ Bulletin of the American Institute of Mining Engineers ” (No. 136), April 1918; “ Salvage—The Official Organ of the Salvage Club ” (No. 1), April 1918 ; “ Cheap Steam ” (Vol. 2, No. 3), May 1918 (Published by Ed. Bennis and Company Limited, 28, Victoria- street, S.W. 1); “ The Commercial and Industrial Museum of Montreal—Annex of the Faculty of Com- merce (Leval University) ” ; “ Monthly Bulletin of the Canadian Mining Institute” (No. 72), April 1918, edited by the secretary; “ The Institution of Mechanical Engineers — Proceedings — October - December 1917 ” (Published by the institution, Storey’s Gate, St. James’s Park, London, S.W. 1); Geological Survey of Canada— Department of Mines :—(Memoir 96) “ Sooke and Duncan Map-Areas, Vancouver Island,” by C. H. Clapp ; (Memoir 101) “ Pleistocene and Recent Deposits in the Vicinity of Ottawa, with a Description of the Soils,” by W. A. Johnson; United States National Museum—The Mineral Industries of the United States : (Bulletin 102, Part 4) “ Coal : The Resource and its Full Utilisation,” by Chester G. Gilbert and Joseph E. Pogue; Boletin del Cuerpo de Ingenieros de Minas del Peru:—(No. 86) “ Estadistica Minera en 1916,” Por Carlo N. Jimeney; (No. 88) “ Inauguracion del Edificio del Cuerpo de Ingenieros de Minas y augas.” American Coal Miners Resolute.—Mr. H. William Short, president of the Washington State Federation of Labour, a member of the American Mission now visiting Europe, declares that the American coal miners are resolute on winning the war. They have agreed with the masters for increased wages of 1 dol. 40c. (5s. lOd.) a day to meet the higher cost of living; no local strikes to be called in violation of the agreement; a fine of 2 dols. (8s. 4d.) a day on each man who broke that under- standing; and a fine of 2 dols. for each day a man was away from work, without sickness or other legitimate excuse, beyond two days a month.