864 THE COLLIERY GUARDIAN April 26, 1918. a pump in which the movement of the piston is caused by rollers co-operating with a roller track on a rotating eccentric. The principal feature of the invention consists in that the rotating eccentric is provided with an inner track embraced by the corresponding rollers which run on the outer periphery thereof, and an outer track sur- rounding the corresponding rollers which run thereon, whereby the piston or each piston is reciprocated or guided in both directions. The shape of the roller tracks may depart in different ways from the circular shape, thereby, for example, attaining the advantage that the piston, or pistons, in one or both dead-centre positions, are at rest during a certain period. This invention is especially suitable for pumps with two or more cylinders, inasmuch as two cylinders may be disposed opposite each other with their common eccentric (roller track) between their ends, which face each other; or several cylinders may be disposed in the form of a star around a common eccentric. Owing to the “ short ” construction which characterises a pump according to the invention, such a multi-cylindered pump will, in its entirety, only take a comparatively small space. (Four claims.) 113585. Apparatus for Producing Combustible Fuel. J. R. Rose, Edgeworth, Allegheny County, Pennsylvania, U.S.A.—This invention relates to an apparatus for manu- facturing gaseous fuel which is particularly well adapted for use in the cutting and welding art. It is the general object of the invention to provide a generator wherein such a fuel can be produced in an efficient and economical manner and without the necessity for the employment of supplemental generators. A further and more limited object df the invention is to produce a generator having an arrangement of flues whereby a hydrocarbon fluid may be dissociated, and the products mingled with another hydrocarbon fluid which is also dissociated, the products of such dissociation being re-combined to produce a new gas which is particularly useful in such cutting and welding art, as described in the specification of the com- panion Application for Letters Patent No. 113657. (Four claims.) 113696. Improvements in Gas-fired Coke Ovens, etc. Simon-Carves Limited, and J. H. Brown, 20, Mount-street, Manchester.—The invention is especially applicable to horizontal ovens and furnaces of the type in which the combustible gas, or mixture of combustible gases, and the air necessary for combustion, are preliminarily heated on their way to the combustion chambers by the products of combustion, or waste gases, as the latter flow to the waste-gas flue or flues. Fig. 1 is a part longitudinal section of a battery of coke ovens embodying the inven- tion. Below each alternate oven A there is provided a central passage B, and below the intervening ovens a there is provided a like passage b. The central passages B and b are flanked by lateral passages B1, B2, and ol, b2, respectively. The com- bustion spaces between the ovens A, a are divided vertically by divisions C into a number of combustion chambers D, each of which is divided by a partition d which does not extend to the top, into two compartments d1, d2. At the top, the central passages B, b communicate with horizontal passages E, e arranged in the soles of the ovens A, a, and these passages E, e are provided with lateral branches E1, E, and e1 e2, respectively, leading t o the combustion chambers D, a branch E1 from each central passage E, and a branch e1 from each central passage e communicating with the compartment d1 of each of the combustion chambers D at each side of the ovens, below which the passages E, e are situated. The compartments d2 of the sets of combustion chambers situated at the right hand side of the alternate ovens A, communicate by lateral branches F, f with the lateral passages B2 and b\ and the compartments d2 of the intervening sets of combustion chambers situated at the right hand side of the ovens a, communicate by like lateral branches F1, fl with the lateral chambers b2 and B1. The central passages B, b and the lateral passages B1, B2, and b1, b2, are preferably fitted with baffles N, so that the gas or mixture, the air, and the waste gases, take sinuous courses therethrough. With the above described arrangement of central gas, mixture and air passages and lateral waste-gas passages, the gas, or mixture of gases, and the air, can be preliminarily heated to such a high temperature that Mond gas and blast furnace gas, or mixtures of such gases, with or without rich coke oven gas, can be used. In addition, better combustion is obtained than hitherto, and rich coke oven gas can be used without sooting up and choking of the various passages, branches, combustion chambers and flues. (Five claims.) 113719. Improvements in Rotary Tipplers. Babcock and Wilcox Limited, Oriel House, 30, Farringdon-street, London, E. C. 4, and V. G. Harris, Cliftville, Hazelwood- lane, Palmers Green, London, N.—This invention relates to improvements in, and connected with, rotary tipplers for effecting the discharge of the contents of railway wagons and the like, and has for its chief object to provide for binding, in a more efficient and expeditious manner than heretofore, the wagons to the rails of the tippler to allow inversion of the wagon. Fig. 1 is an elevation of a rotary tippler' embodying the invention, a railway wagon being shown clamped thereto, and ready to be rotated to effect the discharge of its contents. The clamping bars a, a are adapted to be traversed by means of vertical spindles b screw threaded for a portion of their length, and arranged so as to be disposed two at each side of the wagon c and driven simultaneously through the medium of spur and bevel gearing from longitudinal and transverse shafts <7, e respectively, from a reversing electric motor /. The spindles b are shown mounted at their upper ends in brackets g provided with foot-step bearings, and mounted on the circular ends of the. framework of the rotary tippler, and are mounted at their lower ends in brackets j preferably provided with thrust ball bearings, the vertical spindles associated with one of the clamping bars being preferably threaded oppositely to the vertical spindles of the other clamping bar, so that these spindles, though rotated in opposite oi o directions by the gearing, act in the same direction to effect the upward or downward movement of the clamp- ing bars. A nut is threaded on each of the spindles b, and around each of the said spindles a coil spring is fitted. In use of the apparatus the wagon c is run on to the rails a1 of the tippler and the motor / started, thereby causing the nut threaded on each spindle b to move thereon to compress the springs I and to cause the clamping bars a to grip the wagon. When the lower limit switch r is tripped by the predetermined downward movement of the nut, the motor / is automatically stopped. The tippler is then revolved in the usual way to discharge the contents of the clamped wagon, then returned to the original position, and the motor f reversed to slacken back the nuts k, and raise the clamping bars a from the wagon, motor being stopped by the upper limit switch s when the clamping bars have been raised sufficiently to clear the wagon. The clamping bars a are shown pro- vided at their ends with wheels to engage guide rails carried by the circular framework of the tippler. The whole of the screw threads, travelling nuts, and the springs, are preferably encased so as to prevent coal or dirt falling thereon or between the coils of the springs. In the example shown, the casing t aforesaid, and tubular elements dl, el furnished at their outer ends with covers are provided for this purpose, the elements dl being secured to the members p, and the elements e1 being secured to the plates or discs and passing freely through the crossheads. It is obvious that the form of the clamp- ing bars may be varied, and that the number of screw’- threaded spindles employed may be varied, according to the size of wagons to be treated by the apparatus. (Five claims.) HEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. April 15 to 20 (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.] (Aktiebolaget Atlas Diesel.) Rock drilling machines. (6423) Alchevsky, N. Transporting means. (6389) Alexander, H. Apparatus or kilns for drying granular, pulverulent, and pasty materials. (6612, 6613, 6614) Alger, C. F. Internal-combustion engine. (6340) Anderson, W. Process for production of oil fuel. (6499) Archer, J. Tar stills. (6667) Babcock and Wilcox, Davy, C. S., Meikelreid, D. G., and Parker, A. E. Dumping bars for chain grates. (6709) Babcox and Wilcox, Davy, C. S., Meikelreid, D. G., and Parker, A. E. Ash doors for chain grate furnaces. (6710) Barrow, L. Suction gas producers. (6523) Blythe, J., Holman, J. H., Nettle, W. E., and Selby, P. Improvements in reciprocating rock drills, for supply- ing water to bore-holes during drilling. (6351, 6352) Brooke, R. M., and Dempster and Sons, R. Drains for hydraulic mains used in coal-gas manufacture. (6422) Brown, H. C. Internal-combustion engines. (6589) Bullock, P. W. Means for controlling charging of com- pressed-air reservoirs, etc. (6451) Butterworth, L. Apparatus for controlling mine corves. (6490) Cady, J. W. Gas and oil engines. (6454) Davidson, J. Internal-combustion engines. (6416) Davies, D., and Jones, D. Appliance used in manufacture of tin plates or sheets, etc. (6501) Dent, J. H., and United Alkali Company. Apparatus for distribution of liquids in gas-scrubbers, etc. (6598) Etchells, H. Electric furnaces. (6563) (Fuel Saving Company.) Apparatus for burning pul- verised fuel, for use with locomotive boilers, etc. (6390) Given, R. D. Synchronous dynamo-electric machines. (6599) Greaves, H. A. Electric furnaces. (6563) Greenwood, T. G. Internal-combustion turbine. (6566) Grice, A. G. Multi-cylinder two-stroke-cycle internal-com- bustion engines. (6733) Grimani, Contessa L. Combustible block or tablet. (6574) Hagens, H. Internal-combustion engines. (6519, 6521) Halladay, N. Shackles, etc., and their method of manu- facture. (6645) Hamblet, J. Admixtures for refractory clays. (6568) James, D. Rotary pumps. (6610) Kilpatrick, A. P. High-speed rotary engines. (6716) Kirby, A., Stephenson, H., and Young, J. Liquid hydro- carbon burners of the injection type. (6572) Kirkpatrick, G. Steam generators. (6429) Lanchester, F. W. Internal-combustion engines. (6616) Lanz, A. Electrically driven hoists. (6698) Lawson, J. Sole or headpiece for mine props, or bars to obviate breakage. (6413) Lawton, T. A. D. Electric furnaces. (6660, 6661) Moffett, F. J. Hauling-mechanism. (6588) Morfett, J. E. Air-blast and gas burners. (6403) Morison, D. B. Condensing-plant. (6338) Parry, C. P. Cleaning smoke-tubes of steam-boilers. (6624) Poore, P., and Sulman, H. L. Still heads or dephlegmators. (6674) Priestman B. and E. Pump. (6414) Rees, J., and South Durham Steel and Iron Company. Gas or air ports for regenerative furnaces. (6376) Robey, E. W., and Wood, W. R. Means for obtaining or improving mechanical draught in chimneys, etc. (6534) Roxburgh, A. B. Gas furnaces. (6605) Scott, S. M. Suction gas producers. (6523) (Soc. Anon. Italiana G. Ansaldo and Company.) Pro- duction of gases from water or oil. (6361) Taylor, A. Pumps. (6497) Watson and Company, T. H. Electric furnaces. (6563) Wellesley, R. Internal-combustion engines. (6589) Wellington, S. N. Distillation of coal, etc. (6731) Wilton, G. Treatment of tar for improving its value for fuel purposes and for separation of useful products therefrom. (6375) Complete Specifications Accepted. (To be published on May 9.) [Note.—The number following the application is that which the specification will finally bear.] 1917. 3274. Lancashire Dynamo and Motor Company, and Mason, G. E. Dynamo-electric machinery. (114638) 3296. Legg, A. S., and Bawtree, A. E. Means for regulating the flow of compressed gases. (114639)' 3311. Seward, E. Reinforced concrete, pit props, and like supports. (114640) 3421. Thornbery, J. R. (McKee, J. T.). Draught apparatus for furnaces. (114643) 4807. MacFarlane, G. T. Hauling apparatus. (114650) 4893. Stables. E. C., and Hall, J. and E. Condensers or coolers for gases or liquids. (114651) 5096. Mellor, F. Process and apparatus for the recovery of sulphate of ammonia from producer gases. (114658) 5100. Heinrich, H. Rotary engines, pumps, and the like. (114659) 5264. Wyeth, W. E., and Dowson, R. M. Rotating cylinder internal-combustion engines and com- pressors. (114667) 5344. Cummings, A. and M. Internal-combustion engines. (114670) 5441. Longstaff, T., and Geairns, A. D. Manufacture of briquettes, silica, plastic, gannister, common fire, and like bricks. (114676) 5572. Rosenthal, M. Centrifugal fans, exhausters, com- pressors, blowers, and the like. (105,766) 6093. Gaunt, J., Brookfield, D., and Tylor and Sons, J. Crucible and like furnaces. (114684) 6359. Turner, C .E. G. Doors of fixed overhead bunkers for charging coal, coke, or other substances, into travelling hoppers, and means for operating said doors. (114686) 6631. Saint. G. Momentary contact electric switches for cancelling mining visual signals. (114693) 7855. Wragg, D. ,D., Akeroyd, S., and Drury, E. D. Hauling or lifting tackle. (114708) 8913. Graham, S. Apparatus for pulling out props in mines, and the like. (114723) 10656. Davies, A. Coupling of colliery trams, and the like. (114745) 11445. Sahlin. A. Construction of heating pit furnaces. (114751) 11519. Romanet, E. E. Steam generators. (108682) 12226. Renault, L. Power transmission devices. (111284) 12568. Considere, E. A. Safety automatic devices for cages and shafts for coal pits, mines, and the like. (114756) 13020. Akt.-Ges. Brown, Boveri, et Cie. Turbines. (114760) 13029. Sykes Interlocking Signal Company, W. R., and Tarrant, R. W. Rheostats. (114761) 13203. Marks, E. C. R. (Ashford, J.). Reciprocating pumps. (114762) 13352. Foggo, W. Pit props and the like. (114764) 14932. Dixon, J. L. Electric furnaces. (111103) 15420. Canhac, G. E., Water-tube generators. (110756) 16069. Bullivant. F. A., and Selby, G. M. Manufacture and production of wire ropes. (114779) 18380. Deckers. A. A. J. Process for the manufacture of cement from blast furnace slag. (114794) 1918. 2696. Chesshire, J. H. Tool for splitting blocks of coal and other hard substances. (114809) Complete Specifications open to Public Inspection Before Acceptance. [Note.—The number following the application is that which the specification will finally bear.] 1917. 13561. Ludwigsbergs Werkstads Aktiebolag. Rotary pumps or engines. (114815) 1918. 3577. Westinghouse Electric and Manufacturing Com- pany. Method of generating pressure. (114827) 5232. Barbet et Fils et Cie, E. Tubular evaporating, con- densing, and cooling apparatus. (114838) 6067. Allgemeine Ges. fur Chemische Industrie. Process and apparatus for the continuous and uniform treatment of hydrocarbons with sulphurous acid. (114845) 6261. Parks, H. S. Distant boiler water-level indicator. (114851) Colliery Deputies Federation.—The executive committee of the Colliery Deputies Federation of Great Britain met at the Grafton Hotel, Tottenham Court Road, London, on the 16th and 17th inst. Mr. W. Johnson (Durham) presided. There were also present Messrs. H. Gill (Chesterfield), J. W. Sumnail (North Staffordshire), W. Frowen (South Wales), H. Clarney (Darfield), S. Coulthard (Northumber- land), P. Derbyshire (Lancashire). A deputation was received from the Durham Association. Certain matters dealing with the relations of the deputies and the miners in the County of Durham were considered, and it was decided to endeavour to place the whole facts before the Parliamentary Committee of the Trades Union Congress. Other matters dealt with included the question of shot- lighters and their certification. It was resolved to press that shotlighters should be certificated in the same manner as the deputies are. Matters dealing with the war wage were also considered. The question of the appointment of a whole time secretary was considered at length, and it was resolved to make certain statements to the con- ference which will be held in June at Edinburgh. In dealing with the matter of the appointment of representa- tives to form a party to go to France, the following areas were considered, and the number appointed :—Scotland, 1 ; Cumberland, 1; Durham, 2; Northumberland, 2; York- shire, 2; The National (Midland Counties) 2; North Wales, 1; Somerset and Gloucester, 1; South Wales, 3.