846 THE COLLIERY GUARDIAN. October 22, 1915. 20810. Travelling chain grates for furnaces. Dehn. (Iserman.) 22135. Steam condenser apparatus. Scanes. 22223. Apparatus for ascertaining the temperature of, and for taking samples from, granular and the like material stowed in bulk. James and Beeson. 22405. Fire bars for boiler and other furnaces. Crosthwaite Engineering and Furnace Company, and Cros- thwaite. 22650. Rotary engines, pumps, compressors, or the like. Wittig and Wittig. 22687. Devices for measuring or regulating the flow of gases or for indicating or recording changes of pressure or temperature. Marsh and Walter. 23270. Tell-tale appliances for indicating signals from pit bottoms or pit heads and the like. Brodie and Alison. 23531. Method of securing blades in the rotor of turbines and the like. Marks. (Terry Steam Turbine Com- pany.) 23556. Signalling apparatus for use in mines. Paton. 24020. Locking devices for axle caps of vehicles. Jones. 1915. 343. Base plate for railway or tramway sleepers. Sand- berg. 2334. Cross or skew rolling mills. Evans. 3746. Distance thermometers. Malone. 3863. Ball bearings for shafting, axles, and the like. Coates. 5057. Construction of boiler seatings. Shackleton. 5206. Furnaces for reducing and sterilising town refuse. Pocock. 6675. Furnace for smelting ores. Beaver and Claremont. 7529. Methods of and apparatus for the cutting, autogenous welding, or the like of metals, and so forth under water by means of flame. Deutsch-Luxem- burgische Bergwerks- und Hiitten-Akt.-Ges. 8634. Lift and force pumps. Markwick. 9787. Process of manufacturing rings and tyres of iron or steel. Deutsch-Luxemburgische Bergwerks- und Hiitten-Akt.-Ges. 10030. Shaft and axle bearings. Carlborg and Nyman. Complete Specifications Open to Public Inspection Before Acceptance. 1915. 12037. Superheaters especially applicable to fire tube boilers. Schmidt’sche Heissdampf Ges. 14166. Nozzle of oblique cross section for steam turbines. Vereinigte Dampfturbinen Ges. THE ACQUISITION OF ENEMY PATENT RIGHTS. The following list of British Patents, which have been granted in favour of residents of Germany, Austria, or Hungary, is furnished in view of the new Patents Acts, which empower the Board of Trade to confer upon British subjects the right to manufacture under enemy patents, which right, when acquired, can be retained after the war, and is specially compiled for the Colliery Guardian by Lewis Wm. Goold, chartered patent agent, 5, Corporation- street, Birmingham. It is desirable in the first instance to obtain the latest particulars upon the Patents Register. If any patent listed has been assigned to a non-enemy pro- prietor, the law does not apply. 7293/03. Dynamos; electric motors; dynamos, regulating; motors, controlling. Relates to a system of regulation applicable generally to alternators having their exciting windings in a separate circuit, in which the speed of the rotor varies in the same sense as the voltage in the exciting circuit, instead of, as usual, in the opposite sense. This result is obtained by drawing the exciting current from one or more series trans- formers in circuits carrying the main current, and varying the ratio of the secondary of this transformer, etc., to the primary to vary the voltage of the exciting current, and also the impedance of the circuit. G. Winter, Vienna, and F. Eichberg, Berlin. 7487/03. Coke ovens. Uniform heating of the coking chambers is effected by forming horizontal or slightly inclined flues in the space below the vertical flues of the side walls. These longi- tudinal or slightly inclined flues which are of gradually decreasing length from below up- wards, communicate with the gas supply pipe. The gas is introduced without air through the flues, the necessary air being introduced through similar flues arranged at the side. The gases may be led off through an upper flue, or they may pass through flues leading down- ward between the combustion flues. F. Collin, Germany. 7488/03. Shafts, sinking; shafts. Relates to means for sinking shafts through watery strata with inter- posed solid strata. The portion of the shaft in the solid stratum is increased in width, and is formed with a concrete bed through holes in which the freezing of the next watery stratum is effected. Eismaschinen und Internationale Tiefbau-Ges. von Gebhardt und Koenig and L. Gebhardt, Germany. 7508/03. Explosion engines. To enable explosion engines, which drive air compressors supplying blast to blast furnaces, etc., to supply blast occasion- ally considerably above the normal pressure, air is admitted to the engine cylinder from the delivery pipe of the compressor, instead of from the atmosphere; and fuel is supplied under pressure also by a fan driven by an electro- motor or other means. The engine works on the four-stroke cycle, and the air valve is opened before the exhaust valve closes. Vereinigte Maschinenfabrik Augsburg und Maschinenbaugesellschaft Nurnberg, Akt.-Ges., Germany. 8966/03. Elevators; conveyors. Each bucket is pivoted at above its centre of gravity, in a triangular frame mounted on two pairs of wheels. The bucket thus remains level whatever the position into which its carriage is guided, and can be tilted to discharge its contents by the engage- ment with an incline fixed at any desired point of the track. The carriages are connected by links having universal joint connections with the axles. E. Bousse, Germany. 9087/03. Coking. Uniform heating of ovens with alter- nately operated regenerators, is secured by arranging the heating flues communicating with each regenerator in contact with the flues of the other. G. Wolters, Germany. Copies of . any of the above specifications can be supplied at the price of Is. post free. GOVERNMENT PUBLICATIONS. Any of the following publications may be obtained on application at this office at the price named post free. Bills : Postal and Telegraph Rates, Statutory Limits, Id. Statutory Rules and Orders, 1915 : (Nos. 933 and 935), Defence of the Realm Regulations, IJd. each; (Nos. 906 and 960), Customs Orders, ljd. each; (No. 955), Railway Rates and Charges, ljd. LIST OF MINES FOR 1914, 4s. 5d. Trade and Consular Reports, 1914 : Greece, Piraeus, 3Jd.; Jamaica, 1914-15, 3Jd.; Denmark, St. Thomas and St. Croix, IJd.; Portugal, Madeira, 1914, 2d.; Persia, Kerman, 2d. Trade of the United Kingdom, Vol. 2, 1914, 4s. 7d. PUBLICATIONS RECEIVED. Analyst and Client. By C. H. Ridsdale and F. D. Ridsdale. Middlesbrough : Ridsdale and Company. Prices, 6s. 8d. and 10s. 6d. “ The Mining Magazine ’’ (Vol. 13, No. 4), October, price Is.: “ Calendar for Session 1915-16 of the Armstrong College, Newcastle-on-Tyne, price Is.; “Transactions of the Institution of Mining Engineers ” (Vol. 49, Part 6), price 6s.; “ Monthly Statement of Coal Mine Fatalities in the United States, June 1915," by A. H. Fay (United States Bureau of Mines); “ The Journal of the Franklin Institute” (Vol. 180, No. 4), October, price 50c.; “The Institution of Petroleum Technologists : Its Origin, Pro- gress, and Purposes,” price 2s. Hull Coal Exports.—The official return of the exports of ooal from Hull to foreign countries for the week ending Tuesday, October 12, 1915, is as follows :—Amsterdam, 574 tons; Buenos Ayres, 5,841; Bordeaux, 3,391; Boulogne, 2,505; Calais, 1,314; Copenhagen, 1,801; Gefle, 5,020; Gothenburg, 4,882; Honfleur, 637; Harlingen, 711; Oporto, 1,495; Oxelosund, 456; Rotterdam, 1,220; Rouen, 57,410; Stocksund, 2,256; Stockholm, 2,049; total, 91,562 tons. The above figures do not include bunker coal, shipments for the British Admiralty, nor the Allies' Governments. Corresponding period, October 1914, total 30,878 tons; corresponding period, October 1913, total, 100,812 tons. 1UIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIJ4 The Latest Lamp for Electric Illumination. The Surface Workings of a Colliery need to be well illuminated, otherwise complex Railway Sidings and all manner of obstruc- tions make walking difficult and dangerous. The best lamp for the purpose and for the illumination of foundries and factories is the Osram Atmos Type Lamp—the latest and most economical lamp for artificial lighting. Of great mechanical strength. Consumption approximately half a watt per candle power. Osram Made at’ the Osram-Robertson Lamp Works, Hammersmith, London, W. Wholesale only— The General Electric Co. Ltd., 67, Queen Victoria Street, London, E.C. nillllllllllllllllllllllllllllllllllllllllllinillllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll