1014 THE COLLIERY GUARDIAN. May 26, • 1916. bring the two lamp bulb contacts g g1 opposite to a pair of spring plunger contacts h h1. The lamp bulb holder / is preferably formed of porcelain or other suitable fireproof material, and is externally of a conical or dome shape, as showm, and enamelled white or polished to serve as a reflector. One of the plunger contacts h or h1 inside the lamp bulb holder / is made shorter than the other, or is recessed ip its insulated base i to produce a similar effect, so that when the lamp bulb a is broken or free it will not be in contact with both of the said plunger terminals h and h1. Similarly, one of the lamp contacts could be recessed or set back, and level plunger contacts be employed, or a combination of any such methods providing contact surfaces of different effective lengths. Normally the lamp bulb a is pressed on to both of the plunger contacts h h1 by means of a stop member fc, secured as by cement or otherwise provided within the upper underside portion of a glass bulb protecting case or dome I, as shown in fig. 1, or on the underside of a lamp reflector m on the top plate c of the lamp guard, as shown in fig. 2, where the glass I1 is of cylinder form. This stop member k is of conical form, and may be made of metal or any other material, but it is preferably made of rubber or other resilient material, and enamelled or otherwise treated, to enable it, as shown, to serve as an inside top reflector in conjunction with the outside top reflecting surface m provided on the under- side of the top plate o of the lamp cage or guard proper. This outside reflector m may be sun or stamped as desired, and is preferably also enamelled white, and of conical form, and so arranged as to appear in line with the inner top reflector k inside the protective glass case I or I1. By this arrangement the reflecting surfaces k and m the light from the lamp is collected and sent out in a horizontal direction. (Four claims.) 9680 (1915). Improvements in Apparatus for Feeding Pulverised or Finely Divided Fuel or other Material. Quigley Furnace and Foundry Company, of Springfield, Massachusetts, U.S.A., assignees of A. D. Heyl, of 105, West 40th-street, New York, U.S.A.—Relates to apparatus for feeding pulverised or finely divided fuel or other material, with a type of apparatus in which a feed conveyor screw rotates continuously, and forces a regulated quantity of pulverised coal from a magazine, or chamber, to which the coal is delivered by a hopper or equivalent device, along a feed conduit, and causes it to drop in the path of a trans- verse air blast, which takes up as much of the coal as it can carry to the furnace, whilst any surplus drops below the air blast, and is returned to the magazine by an upwardly inclined return conveyor screw which operates in a lower conduit. Fig. 1 is a vertical central section; fig. 2 a cross section and front elevation corresponding to the line 2—2 of fig. 1; and fig. 3 a detail perspective view of the shield. 1 is the casing of the controller, and 2 the magazine surmounted by the hopper 3. A feed screw 4 extends across the maga- zine and out through a feed conduit 14 at the front of the magazine. From the conduit 14 the material drops across a transverse air blast, which, passes out through the opening 16, the material not carried off by the air blast being returned to the magazine, through the lower and upwardly inclined com- duit 15, by a conveyor screw 5. The conduit 15 is parallel to the inclined bottom 17 of the magazine, and has a part Fig.a. Si extending into the magazine nearly to the rear wall thereof, and forming a channel 9 of U-shaped cross section. The two conveyor screws are connected together by gearing 6 to rotate in unison, and are driven through gearing 7 by an electric motor 8. A shield 10, preferably, as shown in figs. 2 and 3, of an inverted U-shape, is secured over the rear end of the feed conveyor 4 and over the delivery end of the return con- veyor 5, and over the U-shaped channel 9, in which it lies. This shield extends hack to and is, in contact with the rear wall of the magazine. Preferably, it has its upper surface inclined upwardly and backwardly to meet the said rear wall at an angle as shown, and has laterally extending wings 11, 11, so inclined as to fit the inclined bottom 17 of the maga- zine. These wings may have bolt holes 12, .12, through which bolts 13, 13, or other attaching means, may pass to hold the shield in place In operation, the first one or two turns of the screw thread on the feed conveyor 4, being under the shield 10, it or they will not be reached by the current of fresh material flowing down from the hopper 3, but will be left free to receive the returned material which is conveyed along the channel 9 by the return screw conveyor 5. This returned material is thus picked up easily by the feed screw, and forced out from under the shield without meeting any opposing currents. As it issues from under the shield, the currents of new material sliding down the inclined outer sur- face of the shield mingle readily with the returned material, and the whole mass is conveyed to the conduit 14 without jamming or packing together unnecessarily. The use of this simple attachment in some cases reduces the consumption of current needed to drive the controller to one-third, or less, of the amount required to operate it before the invention was applied. (Two 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.] Allday, P. W., and Alldays and Onions Pneumatic Engi- neering Company (7117). Annealing furnaces heated by gaseous fuel. Atherton, C. A. (7214). Electric motors with reduction gear- ing. Ball, F. L. (6974). Combined tar dehydration and ammonia distillation plant. Boving, J. O. (6943). Hydraulically operated valve system. Cammell, Laird and Company, and Carter, G. J. (6953). Apparatus for controlling supply of liquid fuel to steam generators. Chignell, J. (7022). Pressure reducing valves. Clarkson, J. E. (7105). Steam generator. Constantinesco, G., and Haddon, W. (6929 and 6930). Mechanical wave transmission of power. Darker, A. H. (7121). Dynamo electric generators, and systems connected therewith. Davey, H. (6933). Compound steam engine. Davey, H. (6934). Compound condensing steam engines. Dawkins, W. A. (7144). Forming blocks of metal cuttings, etc., for melting. Debnam, H. G. (7111). Rotary internal combustion tur- bines. Dehn, F. B. (Legrand) (7191). Apparatus for mechanically excavating in mines, trenches, etc. Diggle, S. (6910). Regenerative device for carbonising fuel in steam boilers, etc. Dreyfus, S. (7203). Process for purification of trinitro- toluol, etc. Dryburgh, A. P. (7050). Pipe joints, and appliances there- for. Dunlop, G. H. (7188). Excavating machines. Evans, D. (7096). Rotary blower or fan. Farringdon Works and H. Pontifex and Sons (7022). Pres- sure reducing valves. Findlay, M. (7205). Miners’ lamps. Flood, W. H. (7142). Metallic spring keys Jor railway, etc., chairs. Forwood, G. F. (6925). Distilling, cracking, and car- bonising. Forwood, G. F. (6926). Treatment of hydrocarbons. Fox, R. C. (7160). Internal combustion engines. Hiller, H. K. (6974). Combined tar dehydration and ammonia distillation plant. Jackson, W. J. Mellersh- (Lemaire) (6938). Safety cart- ridge for mines. Jarvis, H. W. (6909). Means of transmission by gravity on ropeways. Jenkins, D. J. (7192). Feed water heaters. Keith, G. and J. (6898). Method of delivering mixture of gas and air oir oxygen for combustion. Kohn, M. M. (7014). Electric furnaces. Pierpont, J. H. (7093). Resuscitation apparatus. Piper, H. J. (7013). Railway wagon coupling. Portham, R. S. (7050). Pipe joints, and appliances therefor. Potterton, T. (6947). Gas heated boiler. Punshon, T. B. (7195). Cock-controlled connections for steam heaters. Roberts, A. (7034). Coke ovens, etc., and treatment of gases therefrom. Robinson, J. G. (7226). Steam superheaters of the multiple smoke or fire tube type. Rostin, H. (6925). Distilling, cracking, and carbonising. Rostin, H. (6926). Treatment of hydrocarbons. Smith, W. (708*). Cable or rope stoppers. Soc. E. Barbet et fils et Cie. (7051). Extracting benzols from heavy oils. Southall, J. (6950). Internal combustion engines. Stassano, E. (6946). Stirring molten metal. Stevens, H. A. (7082). Combination brake and grinding shoe for vehicles with flanged wheels. Stevenson, A. C. (6957). Cooling system and flywheels for use with internal combustion engines, etc. Stone and Company, J. (7121). Dynamo electric generators, and systems connected therewith. Superheater Corporation (7226). Steam superheaters of the multiple smoke or fire tube type. Vallely, J. (6910). Regenerative device for carbonising fuel in steam boilers, etc. Voss, E. (6896). Forced induction two-stroke internal com- bustion engine. Warhurst, P. E. (6964). Internal combustion engines. Whittle, R. W. (7050). Pipe joints, and appliances there- for. Woodward, A. J. (6961). Engine. Complete Specifications Accepted. (To be published on June 8.) 1915. 3869. Automatic water level signal or cut-out (or inter- rupter) for water cooled internal combustion engines. Dodd. 5486. Methods of and means for controlling alternating electric currents. British Thomson-Houston Com- pany (General Electric Company). 7288. Liquid fuel burner. Denbigh. 7336. Feed water heaters of the jet or contact type. Baumann. 7392. Piston valves. Brounridge. 7587 and 7589. Automatic car couplers. Willison. 7588. Automatic car coupler. Willison. 7705. Lubricating systems and appliances. Wakefield. 8147. Driving mechanism for governors. Moore, and Ambrose Shardlow and Company. 8353. Two-stroke cycle internal combustion engines. Roscoe and Smyth. 8917. Railway wagon brakes. Livesey. 8920. Apparatus for separating dust or like matter from air or gases, and collecting same. Dod, and Imperia Company. 9655. Brakes for vehicle wheels. McMillen and Connolly. 9932. Apparatus for mechanically moving or handling material in bulk. Holland and Royston. 11072. Identification of electric cables. Kat, and Callender’s Cable and Construction Company. 11101. Auxiliary air inlets for internal combustion engines. Bowden Wire Limited, and Larkin. 11300. Machines for use in mining materials, particularly adapted for use in mining coal and the like. Mavor and Coulson Limited, and Moore. 12468. Construction of pump. Town all. 13495. Feed apparatus for rotating boilers. Blomquist. - 14045. Bearings in rolling mills. Lott. 15792. Electric motors. Osius. 15811. Pistons. Bard. 1/6211. Machines for coating metal plates with tin, terne, or other metal or alloy. Taylor, Davies, and Kear. 16461. Steam wagons. Clayton and Shuttleworth Limited, Robson, and Bretherton. 1916. [Note.—The numbers following the applications are those which the specifications will finally bear.] 742. Power-driven Olivers or tilt hammers. Vincent, J. 100415 757. Starters for internal combustion engines. Walters, J. F. 100425 1669. Process of breaking steel bars. Bellanger, P. V. L. 100418 1866. Valve gear of internal combustion engines. 100266 3700. Shaft furnaces or kilns for burning or calcining lime- stone, dolomite, and the like. 100427 3844. Speed control devices for high-speed steam motors, such as steam turbines. Weir, G. and J., and McCowatt, W. 100423 4022. Means for driving dynamos from engines running at variable speeds. Jackson, W. J. Mellersh-. (Churchward, A.) * 100428 Complete Specifications Open to Public Inspection Before Acceptance. 1916. [Note.—The numbers following the application are those which the specifications will finally bear.] 6266. Means for injecting liquid fuel and other liquids into explosion motor furnaces, etc. Gronkwist, 0. R. 100445 ALIEN PATENTS. The following list of patents granted to German and Austrian subjects is specially compiled for this paper by Messrs. Hughes and Young, patent agents, 55/56, Chancery- lane, London, W.C., who will furnish our readers with any further information they may require :— 1142. Vulcan-Werke Hamburg •und Strettin Akt-Ges. Hydraulic transmission of power. 100210. O. Bracker. Rotary engines. Messrs. Hughes and Young, patent agents, 3, Cherry-street, Birmingham, will be pleased to give any further particulars. GOVERNMENT PUBLICATIONS. *** Any of the following publications may be obtained on application at this office at the price named post free. GOAL MINES EXPLOSIVES ORDER (No. 262), IJd. Military Service (Civil Liabilities) Committee : Regula- tions, 2d. Factory ‘and Workshop Orders, 1916 (Volume), 2s. lid. Military Service Bill as amended in Committee, 2d. Statutory Rules and Orders : No. 286, Workmen’s Com- pensation (Industrial Diseases) Order, IJd. PUBLICATIONS RECEIVED. Annales des Mines : Pairtie Administrative on Recueil de Lois, Decrets, Arretes et Autres Actes ” (Tome 4) (Paris : H. Dunod et E. Pinat); “ Bull, et Comptes Rendus Men- suels de la Societe de 1’Industrie Minerale, Oct.-Dec., 1915 “ Department of Mines and Industries, Union of South Africa : Statistics for March ” ; “ Monthly Bulletin of the Canadian Mining Institute’’ (No. 49), May; “ Third Annual Report of the Water Supply, Sewerage, and Drainage Department of Western Australia for the Year 1914-15’’; “The Journal of the ^Monmouthshire Colliery' Officials’ Association’’ (Vol. 4, No. 2), May; “ The Journal of the Franklin Institute ” (Vol. 181, No. 5), May; “Description of the Laboratories of the Mines Branch of the Department of Mines, Ottawa ” (Bulletin 13, Department of Mines, Canada); “Investigation of a Reported Discovery of Phosphate in Alberta,” by H. S. de Schmid (Bulletin 12 of the Department of Mines, Canada). A New Tool Steel Alloy.—In view of the great importance of high-speed tool steel at the present juncture in producing and machining munitions and for general engineering pur- poses, much interest will be taken in the experiments recently carried out by Messrs. Darwin and Milner Limited, Sheffield, for the purpose of finding a suitable alloy contain- ing neither tungsten, molybdenum, cobalt, nor vanadium. This alloy, for which patent rights were secured in October 1915, is composed entirely of materials which are freely obtainable, and not subjected to a limited supply, as is the case with tungsten. We understand that the original discovery has now been developed to such an extent that the material has attained a high standard of. perfection, and will be put on the market in a few weeks. Apart from the fact that tungsten and molybdenum are dispensed with in the making .of this alloy, it is claimed for this new tool metal that it must be cast in square, flat, or other shaped bars either in iron or sand moulds, and that it immediately, without forging or hardening or heat treatment of any kind, possesses the correct tool hardness, with excellent so-called “ red cutting ” qualities. It dis- penses entirely with the skilled labour at present necessary for the working of high-speed.steel, i.e., to forge, roll, anneal, and harden the material, before a finished tool can be pro- duced. The new alloy, after it is cast, can be immediately ground up to shape on an emery stone, and is ready for use as a turning, planing, or slotting tool. This innovation pro- mises to mark an important stage in tool steel metallurgy, and the properties of the new alloy were publicly demonstrated last week at the company’s works.