1156. THE COLLIERY GUARDIAN. June 16, 1916. cartridge. A toggle lever arrangement is advantageously employed- for operating -the device. Figs. 1 and 2 show the two extreme positions of the closing member in vertical section; fig. 3 is a plan. The cartridge a is connected in the usual manner to the air circulation passages. The used air enters the cartridge at its upper end, and after leaving it at its lower end passes through the pipe b back to the breathing mask. This pipe is provided with a partition c above the cartridge, which causes he breathing gas to enter into a casing adjacent to the pipe, and in which the closing member in the shape of a slide valve reciprocates. The casing also contains a chamber d through which the breath- ing gas is conducted when the slide valve is in a certain position, the chamber being provided for this purpose with ports e and /. A port g leads from the pipe b into the valve casing, and a second port h ‘above the partition c leads back JS-'/y. 1 Kig. 2 X ' 0 into the pipe. Two openings i and k co-operate with these ports, these openings being arranged above the slanting wall m in the movable conduit I. This wall m, together with the upper end n of the slide valve forms a chamber o that has an opening p, which registers with an opening q in the slide valve casing when the slide valve is in its extreme upper position, the opening q forming the mouth of the pipe r that leads the used breathing gas into the cartridge. Another opening <9, in the slide-valve beneath the partition m, co-operates with the opening e in the casing d when the slide valve is moved into a certain position. To the lower part of the slide valve is fixed a flange t that presses down upon the cartridge by means of an elastic washer u. The slide valve I is linked through the flange t to a toggle lever consisting of the two levers v and w, the latter of which is angularly bent and linked to the casing of the slide valve, so that a downward movement of this lever is accompanied by a downward motion of the slide valve. In the positions shown in fig. 1 the breathing gases flow in the direction indicated by the arrows. The used gas flows through the pipe r and the ports q and / into the chamber d, and beneath the partition into the cartridge whence it flows through the pipe b back into the slide valve and through the openings g, i, k, and h back into the breathing mask. If the cartridge is taken out, to be replaced by another, the slide valve I is moved upwards by the shifting of the toggle lever into the position illustrated in fig. 2, the passage through which the used breathing gas enters into the cartridge and into the pipe b being blocked and the gas passing immediately through the chamber o of the slide valve into the pipe lead- ing to the mask. The circulation of air thus remains uninterrupted, and the penetration of exterior air is thus prevented during the exchange of the cartridge. (Four claims.) 10244 (1915). Improved Means for Removing Dust from Gases. ,A. McD. Duckham, of Waseda, Highfield, Ash- stead, Surrey.—The object of the invention is to provide improved means for removing dust from gases, and more particularly from hot gases, such, for instance, as producer gas or -blast furnace gas. The dust-laden gas is passed through a layer of slag wool or other suitable material, such ' as ^asbestos, fine steel turnings, which is not liable to'be destroyed by the gas, and which is carried in a frame so mounted that it can be shaken to remove the dust collected by it. Fig. 1 is a trans- verse section, and fig. 2 a modification. A is a compartment into which gas can enter from a pipe B. C is a box of which the top and bottom are formed of expanded metal D, and which is supported by cams E on longitudinal shafts F in such a way that by rotating the shafts the box can be gradually raised' and suddenly dropped to shake out the dust .that is collected by filtering material contained in the box. The floor of the compartment 7 - slopes down towards the middle, and a screw conveyor is provided to remove the dust. G is a pipe by which the gases escape from the compartment. In order that the thick- ness of the filtering material may be varied, the top of the box is provided with brackets H, by which it may be bolted at various heights to the frame of .the box. In fig. 1 the box has secured to it flexible diaphragms I which are also secured to the walls of the compartment : these close and open as the box rises and falls and effectually prevent the escape of gas, which has passed round the sides of the box to the exit pipe G. In the modification shown in fig. 2, in place of the diaphragms I, the sides and ends of the box are provided with down turned flanges J, which rise and fall in a trough of sand K. If desired, both seals may be employed together. (Three claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. [Note.—Applications arranged alphabetically under the names of the applicants (communicators given in italics). A new number will be given on acceptance, which will replace the application number.] • Adams, C. E. (7953). Tubular steam boilers. Algrin, R. (8254). Internal combustion engines. Armstrong, Whitworth and Company, Sir W. G. (8066). Pistons. Barr, J. F. (8057). Apparatus for fluidising liquid fuel. Bowen, E. W. (8130). Internal combustion engines. Bradshaw, G. E. (8220). Internal combustion engines. Bruce, A. S. (8177). Air intake valves for fuel conduits of internal combustion engines. Buckingham, F. S. (8255). Internal combustion engines. Cardonnel Tin-Plate Company, Bees, J. P., and Strick, J. H. (8062). Machines for cleaning or branning tin- plates or terne-plates. Carney, J. T. (7980). Botary engines. Carter, F. S. (8160). Creepers for raising trams or tubs from lower to higher level. Chrystal, W. J. (8049). Manufacture of refractory bodies and articles. Circulators Limited (8012). Boilers. Cokayne, J. (8038). Furnace bars. Copland, B. D. (8122). Engine governors. Du'bbcr, A. (8186). Conveyor belting. Dvorkovitz, P. (8079).. Production of aromatic hydro- carbons from petroleum, etc., and apparatus to be used therein. Dvorkovitz, P. (Zokovenko) (8196). Turbines, rotary engines, or pumps. General • Electric Company (8128). Electric motor control systems. Hopkins, J. A. (8022). Fuel supply systems for internal combustion engines. Johnson, B. H. (8228). Propping devices for mines, tunnels, etc. Jones, G. (8070). Conveyors. Kesselring, F. (8150). Continuous current dynamos. Klein, A. (8072). Pumps. Klyne, C. H. (7961). Internal combustion engines, parti- cularly of the two-stroke cycle type. . Lamplough, F. (8122). Engine governors. Llewelyn, G. E. (8160). Creepers for raising trams or tubs from lower to higher level. Menchen, J. (8192). Belief valves. Miller, H. P. E. (8106). Valve mechanism. Morgans, B. (7965). Twin rope safety winder. Napier and Son, D. (8067). Pistons of internal combustion engines. Petter, P. ,W. (8077). Internal combustion engines. Ricardo, H. B. (7991). Pistons for internal combustion engines. Bings, F. C. H. (7983). Reinforced concrete lintels and props to uphold roofs, etc., in mines, etc. Boss, S. J. (8012). Boilers. Bowledge, A. J. (8067). Pistons of internal combustion engines. Rutherford, A. B. (8122). Engine governors. Samuel, W. (7913). Gauzes for miners’ safety lamps. Sandberg. C. P. (8004). Apparatus for treatment of steel. Seubert'Bearing Company (8083). Anti-friction bearings. Smith, P. H. (8143). Cylinder covers for internal combus- . tion engines. Southey, A. W. (7925). Method of producing gaseous fuel for internal combustion engines. Still, W. J. (7938). Pistons of internal combustion engines. Thompson, F. G. (8046). Feed motions for drilling and boring machines. Weber, W. (8006). Tool for enlarging boreholes. Williams, W. G. (8002). Means for separating or concen- trating crushed ore products, loose alluvial matter, etc. Winsall, J. (8162). Means for regulating air supply of liquid fuel burners. Complete Specifications Accepted. (To be published on June 29.) 1914. 7092. Valve gear for internal combustion engines. Junkers. 9512. Means for automatically stopping pneumatic tools. Ateliers Leonard Bocour Soc. Anon. 1915. 3327. Process of producing low boiling hydrocarbons. Marks (Iroline Company of America). 3695. Belief valves. Richardson and Knight. 6659. Injection of liquid fuel into the cylinders of internal combustion engines, and apparatus therefor. Fullagar. 7354. Devices.for supplying liquid fuel to internal combus- tion engines at starting. .Martin. 8129. Explosives. Aubert and Kristensen. 8156. Multiple stage blower. - Maschinenfabrik Oerlikon, and Karrer. 81195. Superheaters for water tube boilers. Schmidt’sche , Heissdampf-Ges. 8227. Magneto electrical generating systems. Heys (Neu- land Magnetos Limited). 8266 and 8267. Ball bearings. Nordiska Kullager Aktie- bolaget. 8276. Tools actuated by fluid under pressure. Marks (Timmermans). . 8374. Fluid pressure braking apparatus. Turner. 8455. Mining machines. Morgan. 8572. Dynamo electric machines. Neuland. 8607. Method of manufacturing explosive charges by means of liquid air. Weber. 8762. Gas and liquid coolers and . gas scrubbers. Yates, and Matthews and Yates Limited. 9143. Feed water heaters of the jet or contact type. Baumann. 9757. Botary blowers. Keith and Keith. 10745. Points for tramways, railways, and the like purposes. Edgar Allen and Company, Robinson, and Lar- muth. 11061. Machines for cutting off lengths from bars, billets, tubes, and the like. Clifton and Baird Limited, and Clifton. 11530. Fire bridges for steam generator and other furnaces. Pomeroy. 13226. Exhaust valves of internal combustion engines. Shaw. 13928. Signalling apparatus such as is employed in collieries and the like. John Davis and Son (Derby) Limited, and Davis. 14149. Fire bars. Wadsworth. 14230. Electrolytic process for removing oxide from the sur- faces of articles of iron or steel. Marino. 16453. Pistons of internal combustion engines. Sir W. G. Armstrong, Whitworth and Company, and Le Mesurier. 16692. Winding drums for electric wires, cables, and the like. Smithson, and Callender’s Cable and Con- struction Company. 1916. [Note.—The numbers following the applications are those which the application will finally bear.] . 450. Manufacture of fuel from anthracite duff or small coal. Lloyd, D. P., and Jolley, T. H. 100547 888. Moulds for casting iron and steel ingots. Talbot, B., and James, J. E. 100549 2080. Cooling the cylinders of internal combustion engines. Soc. Anon, des Etablissements Delaunay-Belle- ville. 100124 2809. Boring tools. Kampfe, H. Anschutz-. 100130 Complete Specifications Open to Public Inspection Before Acceptance. 1915. 14215. Melting iron, steel, and other substances not easily reduced to the molten condition. Rincker. 1916. - ’ [Note.—The numbers following the applications are those which the application will finally bear.] 7597. Ball bearings. Deutsche Star Kugelhalter Ges. 100594 Applications to Avoid or Suspend Patents or Licences. No. and year of patent. Name of grantee. | Short tit!e. Name & address 1 of applicant. Date of hearing. 27290/04 J. Pohlig Akt.- Ges. Turnace hoists Newton, Cham- bers and Co. Ltd., Thorn- cliffe Iron Wks. and Collieries, near Sheffield. June 23. 20598/07 Aumund Charging- m e c h a nism for blast fur- naces. Newton, Cham- bers and Co. Ltd., Thorn- cliffe Iron Wks. and Collieries, near Sheffield. June 23. 19294/09 J. Pohlig Akt.- Ges. Opening and closing d p - vices for mouths o f furnaces. Newton, Cham- bers and Co. Ltd., Thorn- cliffe Iron Wks. and Collieries, near Sheffield. June 23. GOVERNMENT PUBLICATIONS. *^*Any of the following publications may be obtained on application at this office at the price named post free. MINES AND QUARRIES FORM No. 54, 4d. Trade and Navigation Returns for May, Is. lid. Boiler Explosion Report No. 2411 : Steam Pipe at Bardon Hill Granite. Quarries, near Leicester, 8d. Statutory Bules and Orders, 1916 : No. 254, Customs, Pre- entry of Goods, l|d. ; No. 322, ditto, Order in Council, ljd.; No. 325, Industrial and Provident Societies’ Bules, ljd. PUBLICATIONS RECEIVED. Tests of Reinforced Concrete Flat Slab Structures,” by A. N. Talbot and W. A. Slater (Bulletin 84 of the Univer- sity of Illinois); “The Strength and Stiffness of Steel under Biaxial Loading,” by A. J., Becker (Bulletin 85 of the University of Illinois); “ The Iowa Engineer” (Vol. 16, No. 8), May; “Bulletin of the American Institute of Mining Engineers,” June: “Bull, del Cuerpo de Inge- nieros de Minas del Peru.” Bunkering at Natal.—Owing to the congested state of the bunkering trade of Natal,- the Collector of Customs has issued a circular letter to shipping agents providing for the restriction of the quantity of bunker coal supplied to certain vessels. This letter states that in the case of vessels going cast and to Australia, the supply of bunker coal must be restricted to an amount sufficient to carry the vessel to the next bunkering port, but an allowance will be made for any diversion from the direct route which a master may desire to make to reduce the risk of capture. The supply to vessels proceeding westward is, however, not being restricted. Panama Canal Coal Supplies.—The Panama Canal inti- mates that until further notice it will not engage to, supply coal at the established rates to other vessels than those tran- siting the canal, those using either terminal port as a ter- minus of their established route, or those using either terminal port as a port of call on their regularly established route. In this case vessels will be supplied with sufficient bunker coal at the established rate to make the next port of call on their established route where commercial coaling stations are available. It is the policy of the canal to retain the price of coal at as low a figure as possible, and also to stabilise the price of bunker coal at the canal during, the present unsettled condition of the - world’s shipping, but, owing to the scarcity of bottoms available to deliver coal at the canal, it will be necessary to supply bunker coal only to those vessels that are using the canal and its facilities.