1150 THE COLLIERY GUARDIAN. November 29, 1918. ABSTRACTS OF PATENT SPECIFICATIONS RECENTLY ACCEPTED. 115434. Hope Haulage Systems. Compagnie Generale Electrique, Rue Oberlin, Nancy, Meurthe and Moselle, France.—In the haulage system, by flexible cables, as described in Letters Patent No. 103998, the axis of rotation of the rollers occupies a fixed position. Under these con- ditions the flexibility which it is possible to give to the cable depends solely on the form and position of the rollers required to support it while permitting the release of the connecting rope. But whatever the form of these rollers, the cable has a tendency to slip from them when the connecting rope forms with the direction of the cable a very large angle. One of the practical means of preventing the slipping off of the tractor cable would consist in making this cable more taut, which obviously would destroy its flexibility by this amount, and as a result in certain cases the advantages arising from the use of a flexible cable would be completely nullified. The present invention consists in an improvement in the arrangement forming the subject of the Letters Patent permitting of maintaining under any conditions of trac- tion the use of a perfectly flexible cable. By this improve- ment the effort exerted on the retaining roller or rollers by the cable when the latter assumes an inclined direc- tion is utilised to displace the supporting roller so as to prevent the slipping off of this cable when the connecting rope makes too great an angle with the direction of the cable. In accordance with the invention, the support- ing roller and corresponding retaining roller or rollers are mounted on a common movable' support or supporting roller actuator capable of turning automatically under the action of tractor cable when the latter assumes an inclined direction. (Three claims.) 120060. Centrifugal Pumps. Worthington Pump Com- pany Limited, Queen’s House, Kingsway, London, W.C. 2. —This invention relates to two-stage centrifugal pumps of the volute type having two single suction impellers arranged back to back with their single suctions in oppo- site directions and with volute deliveries and a passage connecting the discharge volute of the first stage with the suction of the second stage. The object of the present invention is to produce an improved pump of the above type which shall be of high efficiency, and in which the fluid shall make no sharp turns, and the velocity of the fluid shall be gradually reduced and transformed to pres- sure between the first and second stages. The invention consists in a centrifugal pump of the type referred to, characterised by the discharge passage running tangen- tially from the first discharge volute in gradually increas- ing cross section to gradually reduce the velocity of the fluid and transform it into pressure and then transversely under the volute delivery of the second stage and upward to the eye of the second impeller. (Two claims.) 120079. Multiple Regenerators for Coke Ovens. D. Bagley, 92, Victoria-street, Westminster.—In a known construction of coke ovens there are two regenerators placed end to end beneath each oven and serving the heating flues corresponding with that oven. One of these regenerators heats the air supplied to the flues above it, while the other is being heated by the products of com- bustion from the flues above it, these functions being periodically reversed in well known manner. In this con- struction the regenerators are not as efficient as they might be, because the draught causes the gases to take an oblique course in them, thus using to the fullest extent only a portion of the brickwork. This difficulty has been met by subdividing the regenerator into compartments by vertical partitions, causing the gases to travel in vertical paths to the collecting flue beneath the re- generator. Here again, however, there is a tendency for the gases to travel through the compartments at different velocities varying inversely with the distance of the com- partment from the exit of the collecting flue. To avoid this the cross section of the passage from each compart- ment to the collecting flue has been suitably increased as the distance of the compartment from the said exit increases. What happens in the case of the descending streams of products of combustion happens also in the case of the ascending air, and by the present invention provision is made for distributing the air more or less uniformly over the whole of the compartments by con- structing beneath the regenerator an air supply channel, the cross section of which diminishes uniformly from the end at which the air enters to the other end. (Three claims.) . 120089. ' Pumps of the Reciprocating Type. J. W. Restler, Savoy Court, Strand, Westminster.—This inven- tion relates, to pumps of the reciprocating type, and con- sists in an improved method of constructing or arranging certain of the working parts with a view to rendering the apparatus specially adapted for being rapidly brought into use, for affording facilities for the ready examination, repair or renewal of the working parts, and for the re- starting of the apparatus with the minimum of labour, tools or appliances. The apparatus may be of the single or double acting type, and may be arranged either hori- zontally or vertically. (Two claims.) 120091. Double-Acting Steam Pumps. T. Jefferson, 16, Poplar-crescent, and W. B. R. Vickers, 64, Rectory- terrace, Gateshead.—This invention relates to double- acting steam pumps of that type in which the steam cylinder and pumping cylinder are arranged end to end with their axes in alignment, the steam and -pumping cylinders being each provided with a piston, said pistons beings fixed at the opposite end of a common piston rod which passes through suitable stuffing boxes in the adjacent ends of the cylinders, the steam inlet and exhaust valve being disposed at the opposite end of the steam cylinder to the pumping cylinder and adapted to be operated by a “ lost motion ” connection to the piston of the steam cylinder. A pump of this type made in accordance with this invention is characterised in that the steam is admitted by a sliding D valve controlling three ports, the two outer ports of equal size leading to the top and bottom of the steam cylinder respectively, and the centre port leading to the exhaust, and in that the pumping cylinder is tapered externally towards the centre. The “ lost motion ” con- nection whereby the slide valve is operated, of known construction, comprises a spindle co-axial with the steam cylinder, connected at one end to the slide valve and extending through a gland into the steam cylinder and through an orifice in the centre of the steam piston into the piston rod, which is made hollow to receive it. The spindle is provided with two stops or shoulders adapted to be engaged by a restricted orifice in a plate fixed on the piston around the spindle, the arrangement being such that the moved slide valve is thus moved only when the piston nears the end of its stroke. The pumping cylinder, of known construction, is provided with separate inlet and discharge passages at each end. The two inlet passages lead in opposite directions from a common inlet orifice to inlet valve chambers containing non-return valves which only permit inward flow, each valve chamber communicating with one end of the pumping cylinder. The two discharge passages lead in opposite directions to a common discharge orifice from discharge valve chambers containing non-return valves which only permit outward flow, each valve chamber communicating with one end of the cylinder. The inlet and discharge passages are conveniently provided in the walls of the pumping cylinder, the inlet and discharge orifices being situated midway of the length or height of said cylinder. The inlet and discharge valve chambers may be mounted on the end covers of the pumping cylinder. A starting valve is provided and adapted to control a by-pass leading from the valve chest to the adjacent end of the steam cylinder whereby steam can be admitted to that end of the cylinder and the pump started no matter in what position it may be standing. Conveniently the starting valve comprises a screwed spindle adapted to be rotated by a hand wheel to withdraw or close its end from or on to its seat. (Two claims.) 120139. Carbonisation of Coal and Cannel. J. T. Key, Oakleigh, Station-street, Ashbourne.—The object of this invention is to remove as much as possible of the tar, ammonia, sulphur compounds and carbonic acid gas as far as it is found necessary, without injury to the illuminating power of the gas, the invention consisting in the construction and arrangement of parts in a plant where steam pipes are employed running longitudinally with the retorts and provided with jets communicating therewith, and in the provision in such an apparatus of mixing tubes with grids having their openings arranged in the alternate grids at right angles to one another. The process of distillation or carbonisation is as follows : When a retort is in an incandescent state after the coal gas and other volatile products have been distilled off, steam is passed through for the purpose of superheating it, and then immediately conducted to the mixing tube; there the steam rises and comes into contact with the coal gas and other volatile products which are being conveyed from contiguous retorts. The consequence is that the coal gas and other volatile products are separated from the heavier matter, which gradually falls to the bottom of the mixing tube and thence is conveyed by any suitable means to waste tanks. The mixture of steam and volatile products eliminated from the carbonaceous matter are driven by the steam pressure to the top of the mixing tube, whence they pass out to undergo further purification according to the ordinary process of coal gas manufacture. Each retort after the distillation of the coal has been effected is treated in a similar manner by passing steam through as already indicated. (Two claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. November 18 to 23 (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.] (Adie, S.G. Wenham-, and Lambert, E. A. and J. G.) Internal combustion engines. (18954) Aktiebolaget Ingenibrsfirma F. Egnell. Gas analysing apparatus. (19066) Appleby, E. G., and Bentley, G. H. Apparatus for feed- ing fuel to .gas generators, etc. (18888) Ashton, J. W., and Aston, J. H. Dynamo. (19000) Beardmore and Co., W. Water tube steam boilers. (19117) Beardmore and Co., W. Vertical multitubular boilers. (19118) Best. W. Miners’ safety lamps. (19287) Blake, A. Water tube steam boilers. (19117) Blake, A. Vertical multitubular boilers. (19118) Burney, C. D. Apparatus for distillation of solid carbona- ceous material. (19177) Cahen, H. Internal combustion and steam engines, etc. (19101) Chandler, D. Gas heated furnaces. (18983) Damblanc, L., and Mutti, L. Rotary engines. (19036) Davidson, J. Internal combustion engines. (19289) Debnam, H. G. Rotary internal combustion engines. (19240) Deighton, W. Vertical, etc., boilers or steam generators. (19288) Dewhurst, J. H. Side tipping or dumping cars. (19202) Down, T. M. Internal combustion engines. (19164) English, ,W. E., and Hannan, J. R. Steam superheaters, etc. 18971) Fortunesco, N. J. Rotary engines. (19166) Fullerton, Hodgart, and Barclay. Air compressors. (19219) Gibbs, F. H. Reversible steam turbines. (18938) Hall, M. W. Internal combustion engines. (19258) Hazell, R. L. K. Revolving grates, and method of apply- ing to circular furnaces. (19001) Hobbs, T. G., and Jones, J. D. Apparatus for spreading stone dust, etc., in mine tunnels and airways. (18930) Hollick, W. J. Grabs, lifting dogs, etc. (19281) Howard, J. W., and Morphew, L. D. Electrical trans- formers. (19031) Hoyle, J. K. Aerial ropeway transporters; (19186) Humphrey, J. F. Internal combustion engines. (19014) Jensen, N. C. F. Dynamo-electric machines. (18892) Kipling, H. T. Double power turbine engine. (18852) Lanchester, F. W. Internal combustion engines. (19212) Le Breton, W. H., and Surridge, L. T. Boilers. (18974) (Le Petit, C.) Production of fuels. (19134) Llewellen, S., and Phipps, W. Rotary engines, internal combustion turbines. (19308) Lockhart, W. S. Means for raising water, etc. (18898) McGregor, W. Air compressors. (19219) Merz and McLellan, Michie, A. C., and Weeks, E. G. Means for feeding furnaces for boilers, etc., with solid fuel. (19082) Merz and McLellan, Michie, A. C., and Weeks, E. G. Low temperature distillation of fuel. (19083) Mills, C. H. Steam superheaters, etc. (18971) Mogford, J. Distillation of solid fuel. (19199) Morison, D. B. Steam condensing plant. (19263) Paine, M. H. Internal combustion engines. (19224) Pearson, D. A. Internal combustion engines. (19309) Robey, E. W., and Wood, W. R. Removal of ashes, etc., from furnaces. (19332) Roe, J. P. Endless conveyors. (19333) (Rolfe, A.) Dynamo-electric machines. (18988) Rossiter, C. F. Internal combustion engines. (19289) Sheppard, J., and Sutcliffe, R. J. and W. Adjustable and collapsible pit prop. (18931) Sheppard, J., and Sutcliffe, R. J. and W. Adjustable and collapsible prop for use in mines, quarries, tunnels, etc. (19008) Siemens Bros. Dynamo Works Limited. Electrical trans- formers. (19031) Smith, H. Internal combustion engines. (19224) Soc. Anon pour 1’Exploitation des Procedes Westing- house-Leblanc. Internal combustion motors. (18896) Soc. Le Coke Industrial Soc. Anon. Apparatus for separa- tion of coke or carbon from slag, etc. (19322) t South Metropolitan Gas Company. Gas heated furnaces. (18983) Stott, R. Rotary internal combustion engines. (18864) Suchostawer, D. Electric dynamos. (18957) Suchostawer, D. Method of producing electricity and mechanical power by permanent magneto. (18958) Tilney, M. J. E. Dynamo-electric machines. (18892) Whaley, R. S. Internal combustion engines. (19304) Wilde, A. H. Internal combustion engines. (19020) Complete Specifications Accepted. [Note.—The number following the application is that which the specification will finally bear.] (To be published on December 12.) 1917. 12020. Freeman, N. H. Means for controlling the tem- perature in furnaces and other apparatus. (120590) 14745. Wilton, G. Distillation and recovery of ammonia from ammoniacal liquor, and apparatus therefor. (120596) 15089. Smith, D. J. Gas producers. (120599) 16291. Ritchie, W. G. Petrol and like motors. (120601) 16559. Yeadon, J. A., and Whitaker, T. System of smelt- ing. (120610) 16608. Ricardo H. R. Internal combustion engines. (120613) 17454. Kennedy, H. A. Refractory material, and process of making the same. (111853) 17463. Lindley, W. Drills or percussive tools for boring in rock or other material. (120640) 17523. Worthington, L. Couplings or sockets for timber pit props. (120645) 17601. Gardner, T. G., and Hepburn, G. D. Jib cranes. (120650) 17892. Cortese, E. Furnaces for roasting ores and the like. (120654) 18397. Hewat, H. A. Steam superheaters. (120656) 19168. Williams, A., Williams, L. D., and Thames Trading Company. Appliance for giving a warning of the presence of combustible gases or vapour in the atmosphere. (120661) 1918. 531. Sivyer, F. J. Apparatus for the manufacture of coke. (113091) 642. Smith, R. J. Self-contained vertical combined water and smoke tube steam generator. (120665) 1055. Kelly, T. D. Motive power engines. (120669) 2832. Smith, D. J. Scrubbers, cleansers, and coolers for gas. (120684) 4013. British Thomson-Houston Company (General Elec- tric Company). Internal combustion engines. 120692) 7473. Aubert, A. M. Furnaces. (115840) 9884. Diebold, F. Atomising of liquid substances into very small particles. (117077) Complete Specifications open to Public Inspection Before Acceptance. [Note.—The number following the application is that which the specification will finally bear.] 1918. 14628. Hart, W. Suction gas plants. (120717) Application for Restoration of Lapsed Patent. The Universal Turbine Company have made application for the restoration of Patent No. 614 of 1913 for “ im- provements in fluid-pressure or steam turbine engines.” Notice of opposition may be lodged at the Patent Office, 25, Southampton Buildings, London, W.C. 2, on or before January 27, 1919. PUBLICATIONS RECEIVED. The Journal of Industrial and Engineering Chemistry (Vol. 10, No. 11), November 1, 1918 (published monthly by the American Chemical Society); Journal of the Franklin Institute (Vol. 186, No. 5), November 1918, single numbers 50 cents; Proceedings of the Engineers’ Society of Western Pennsylvania (Vol. 34, No. 5), June 1918; Journal of the American Peat Society (Inc.) (Vol. 11, No. 4), October 1918, single numbers 1^ dols.; The Mining Congress Journal (Vol. 4, No. 10), October 1918, 20 cents per copy; Monthly Bulletin of the Canadian Mining Institute (No. 79), November 1918; Bulletin et Comptes Rendus Mensuels de la Societe de 1’Industrie Minerale (Vol. 13, No. 2); United States Bureau of Mines, Department of the Interior: Bulletin 145, Measuring the Temperature of Gases in Boiler Settings, by H. Kreisinger and J. F. Barkley; Bulletin 156, The Diesel Engine : Its Fuels and Its Uses, by Herbert Haas; Chart of Properties of Mine Gases, compiled by G. A. Burrell; Technical Paper 178, Notes on Lignite : Its Characteristics and Its Utilisation, by S. M. Darling; Bulletin 127, “Gold Dredging in the United States, by Charles Janin; Efficiency in the Use of Oil Fuel—A Handbook for Boiler Plant and Locomotive Engineers, by J. M. Wadsworth; Technical Paper 139, Low-Rate Combustion in Fuel Beds of Hand-Fired Furnaces, by Henry Kreisinger and others; Technical Paper 154, Sugges- tions for Improved Methods of Mining Coal on Indian Lands in Oklahoma, by J. J. Rutledge and Daniel Harrington; Technical Paper 186, “Methods for Routine Work in the Explosives Physical Laboratory of the Bureau of Mines, by S. P. Howell and J. E. Tiffany; Technical Paper 192, Production of Explosives in the United States During the Calendar Year 1917, compiled by Albert H. Fay; Technical Paper 205, Saving Coal in Boiler Plants, by Henry Kreisinger; Technical Paper 206, “ Coke Oven Accidents in the United States During the Calendar Year 1917, compiled by Albert H. Fay; Monthly Statement of Coal Mine Fatalities in the United States, June 1918—List of Permissible Explo- sives, Lamps, and Motors tested prior to July 31, 1918, compiled by Albert H. Fay. Briey Iron Mines Undamaged.—In their recent march Rhinewards, the American Armies found the iron mines of Briey apparently undamaged. Some of the mines were being worked as the American troops marched past. The townspeople declare that the Germans have not taken any machinery since the armistice.