276 THE COLLIERY GUARDIAN August 11, 1916. the movement of the valve is accelerated to the right, port g and annular groove h are shut off, and admission to the left hand side of piston p is stopped. Air then passes from main inlet b by groove /2, to ports f1 and /, and thence to the right hand of piston p, forcing it to the left. As soon as the exhaust port z is closed, compression of the air in the cylinder commences, and continues until the air pressure is sufficient to overcome the pressure on the total surfaces of the button a1 and collar a, when the valve is forced to the left, thereby causing the right hand side of main piston p to be open to , I H exhaust through ports /, f1, and e, and at the same time admitting air by port g, annular groove h, and port i, to the left hand of the piston p, forcing same outwards again. As the valve finishes its travel to the left the surface between the button a1 and the collar a is again placed in communication with exhaust through the ports x, y, and e, thus reducing the area under direct pressure. (Three claims.) 100130. Improvements in Boring Tools. H. Anschutz- Kaempfe, of 9, Heikendorf er Weg, Neumuhlen, near Kiel, Germany.—Relates to a boring tool and method of applica- tion, whereby4 any departures of the boreholes from the vertical can be immediately ascertained during boring and corrected by a corresponding control of the boring tool, so that the finished boreholes are on the -average closer to the vertical than was the case hitherto, and a separate checking becomes unnecessary. In the drawing, 1 is the bottom end of the hollow bar carrying the boring head 2, to which is secured the boring bit 3, the cutting edge of which is ground somewhat aslant so that one end a of the cutting edge is at a lower level than the other. A weight 4 is suspended at the point 5 as a pendulum by means of a cardan joint. It is carried by a rod 6 with an extension 7, which terminate in contact balls 8 and 9. The ball 8 is arranged between two parallel contact tracks 10. The latter can be jointly moved normally to the plane of the paper by means of an electric motor 12. Their distance apart is not modified thereby. They are moved whenever, through deviation of the borehole, either the one or the other, according to the direction of the movement, comes into contact with the contact ball 8. This results in the closing of circuits of the motor 12, which then moves the contact tracks so that they always follow the movement of the ball 8 relatively to the bar 1, inasfar as it takes place normally to the plane of the drawing. As soon as the ball 8 is again between the contact tracks 10 without being in contact with either of them, the circuit of the motor 12 is completely open. Exactly the same arrangement is provided for the ball 9, contact track 11 and motor 13, with the only difference that the movements of the ball 9 relatively to the bar 1 which take place in the plane of the drawing, are those which are reproduced by the contact tracks 11. The result is that the rotations of the motors 12 -and 13 supply a scale, in rectangular co-ordi-' nates, for any inclination of the hollow heavy bar 1 rela- tively to the plumb line. In order to render the posi- tion of the pendulum inde- pendent of the action of the blows imparted to the boring tods, it is preferable to secure the whole device to a sliding carriage adjustable in the longitudinal direction of the bar and provided with springs 15 or pads of rubber or the like, forming a buffer between it and the bar. The rotation of the motors 12 and 13 electrically controls tinuous current motors, which in the known manner, con- reproduce on the surface in suitable apparatus the position of the pendulum decomposed into two co-ordinates. (Patent No. 27005 of 1912.) As long as the borehole remains exactly vertical, the indicating apparatus stands at zero. In this case, the boring rods, and therefore also the boring bit, are uniformly turned in a circle, so that the bevelled cutting edge produces on the bottom of the borehole a cone, and does not favour any departure from the vertical. In the event, however, of such a departure nevertheless appearing, it will be indicated on the surface by the indicating apparatus. The lower edge a of the boring bit 3' is thereupon caused to reciprocate only in a semi-circle, owing to which the bottom of the borehole will be made deeper at one side than at the other. The bit will then have the tendency to slip towards that side, and this will produce, as the depth increases, a lateral shifting of the borehole in that direction. This will be continued until the indicating apparatus on the surface shows that the borehole has again assumed a vertical direction. (Three claims.) 100547. Manufacture of Fuel from Anthracite Duff or Small Coal. D. P. Lloyd, 14, Park-street, and T. H. Jolley, High-street, Ammanford, Carmarthenshire.—Relates to a process for the manufacture of fuel, in which anthracite duff or small coal is mixed with lime or cement, salt and pitch, in, e.g., the following proportions : One part of lime or cement to from 20 to 25 parts of duff and from 2 to 4 lb. of salt to each ton of duff. The pitch is used in a liquid form, and is applied as a lubricant to the faces of the steam heated moulds. The lime or cement is ground in a mill and passed on in the necessary quantities to a mixer, where it meets the duff and’ salt, which is brought by elevator. The mixed lime or cement, duff and salt is carried to another mill or disinte- grator, where it is ground into a powder and thence it is carried by elevator to a second mixer, w’here it is thoroughly moistened. From this stage, when lime is used, it is con- veyed to a suitable storage and allowed to stand for from six to 12 hours before being again moistened and passed to the press. When cement is used, no storing is necessary, but the mixture is passed direct from the last mixer, where it is moistened, to the press. (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 in parentheses). A new number will be given on acceptance, which will replace the application number.] Abrahams, E. G. (10915). Case hardening of metals. Abrahams, E. G. (10970). Raising water and other liquids. Alfelder Maschinen-und-Modell-Fabrik Kiinkell, Wagner, and Company (10835). Pressure moulding machines for manual operation for large moulds. Anderson, W., and Meikle, J. (11033). Production of toluol, benzol, and other light hydrocarbons from heavy oils. Andersen, W. (11034). Carbonisation of coal, etc. Anthony, A. H. (11087). Automatic feed regulators for boilers, etc. Blaney, W. T. (10863). Dust collector. Boothroyd, A. W. (10787, 10898). Disposition of, and trans- mission of, power from groups of internal combustion engines. British Thomson-Houston Company (General Electric Com- pany (10906). Governing mechanism for compressors and exhausters. British Thomson-Houston Company (General Electric Com- pany (11013). Electric motor control. Brown, R. J. Wainwright- (10915). Case hardening metals. Bugatti, E. (10831). Engines arranged in groups. Cammell, Laird and Company, and Carter, G. J. (10768). Oil fuel heaters, feed water heaters, etc. Capron, F. (10864). Process for manufacture of ammonium sulphate. Clarkson, T. (11029). Vaporisers for liquid hydrocarbons. Clarkson, T. (11030). Feed water apparatus for steam generators. Cocking, A. T. (10852). Manufacture of explosives. Cudlip, J. B. and J. S., Parr, A., and Wallis, S. (10926). Production of cast iron. Davidson, J. (11011). Internal combustion engines. Dayton, W. C. (10889). Making gas from liquid hydro- carbons. Electromotors Limited, and Greenhalgh, E. (10882). Dynamo electric machinery. Fellows, A. W. (11007). Internal combustion engines. Firth, J. (10835). Driving and controlling dynamo electric generators. Fitch, F. N. (11042). Wire damp. Green Fuel Economizer Company (10794). Centrifugal fans. Gronvall, J. (10936). Controlling and reversing mechanism for valves, etc. Hall, I. (10822). Means for coating wire, etc. Hannin, J. (10959). Liquid fuel for internal combustion engines. Hayes, J. S. (11025). Semi-rotary pumps. Heyl, G. E. (10781). Liquid fuels. Hinchley, J. W. (10976). Expressing liquid from peat. Hird, H. P. (10885). Process for extracting tar acids or phenols -from coal tar or like oils. Jarvi, K., and Makinen, K. (10901). Gross ties and rail fastenings. Jerrard, E. P. (10786). Converting energy of combustible fuels into power. Kynoch Limited (10852). Manufacture of explosives. Lironi, V. G. (11018). Internal combustion engines. Longbottcm, B. (10882). Dynamo electric machinery. Lukasiewicz, B. (11095). Measuring instruments for mining, etc., purposes. Meek, J. W. (10970). Raising water and other liquids. Morison, D. B. (10957). Apparatus relating to withdrawal of air and water from steam condensers. Morison, D. B. (10958). Apparatus for heating boiler feed water. Mumford Limited, A. G. (10787, 10898). Disposition of, and transmission of, power from groups of internal combustion engines. Newton, F. and F. G. (10935). Liquid fuel for internal com- bustion engines, etc. Percival, B. (10776). Water sealed valve and arrangement of flues. Pickard, W. (11080). Internal combustion engines. Pinckney, P. (11021). Machinery for transmitting heat into work. Plowright, J. O. (10935). Liquid fuel for internal combus- tion engines, etc. Porter, A. F., and Seymour, G. E. (10974). Construction of transporter truck, etc. Portham, R. S. (11049). Superheating apparatus for boilers of fire tube type. Rhodes, W. F. W. (10835). Driving and controlling dynamo electric generators. Ricardo, H. R. (10893, 10894). Internal combustion engines. Shankland, D. (10838). Tipping wagons. Shaw, C. M. (11061). Steam generators. Shepherd, T. (11025). Semi-rotary pumps. Silvers, C. O. (10337). Cementation of iron and steel. Smith, W. W. (10903). Internal combustion engines. Svcnska Turbinfabriks Aktiebolaget Ljungstrom (10830). Superheater tubes. Talcott, M. W. and W. O. (10992). Belt fasteners. Thomas, A. E. (10956). Anti-corrosive treatment for wrought iron and steel pipes and tubes used for conveying steam, water, and gas. Vacuum Brake Company (Billinton.) (10964). Piston rods for use with vacuum brake cylinders. Wall, A. W. (10949). Internal combustion engines. Watts, O. (10909). Haulage indicators. Wiesengrund, B. (10823). Power transmission gearing. Williams, E. T. (11056). Packing and jointing material. Wilton, N. (10816). Apparatus for treating gases with liquids. Winsail, J. (11022). Construction of water boiler. AV right son, W. P. (11041). Means for supporting the casings of non-conducting coverings on the surfaces of steam boilers, steam pipes, etc. Youngson, S. (10819). Self-closing valves for tubular con- nections. Complete Specifications Accepted. (To be published on August 24.) 1914. 15689. Methods of and apparatus for washing coal and other minerals. Habets. 1915. 5451. Rock hammer drills and the like. Kewley and Conner. 11321. Starting and synchronising of dynamo electric machines. British Thomson-Houston Company, and Whitaker. 11343. Jib cranes. Priestman. 11486. Process for the production of ammonia. Thorssell. 11933. Valve mechanism for internal combustion and other engines. Riley. 12790. Valve. Jones. 13358. Valves. Blakeborough and Broadhead. 13373. Means for atomising paraffin or the like for use in internal combustion engines. Sweetser. 13934. Operating rotary converters and other alternating current machinery. Railing and Garrard. 14215. Melting of iron, steel, and other substances not easily reduced to the molten condition. Rincker. 14546. Reducing valves. Jacquel. 16839. Pressure reducing valves for steam and other fluids. Bailey and Bailey. 17081. Dry process and an apparatus for purifying blast fur- , nace gases. Dortmunder Bruckinbau C. H. Jucho (firm of), and Haring. 1916. [Note.—The numbers following the application are those which the application will finally bear.] 1484. Sprayers and injectors for liquid fuels. Marks, E. C. R. (Turconi, C.). 100972 1717. Manufacture of hollow metal ingots. Bedford, R. A. 101008 2967. Sheet metal split pulleys. Haddan, R. (Barry Com- pany). 100975 3584. Internal combustion engine valve gear and mechanism. Barker, T. N. 100977 Complete Specifications Open to Public Inspection Before Acceptance. 1915. 16608. Fluid pressure braking apparatus. Westinghouse Brake Company. 1916. [Note.—The number following the application is that which the application will finally bear.] 9823. Check valves. Naamlooze Vennootschap Holland Ventiel. 101018 GOVERNMENT PUBLICATIONS. Any of the following publications may be obtained on application at this office at the price named post free. Trade and Navigation Returns for July, Is. lid. Swansea Harbour Act, 1916, 6jd. Public Works Loan Bill, l|d. PUBLICATIONS RECEIVED. Coal Miners’ Pocket Book. London : Hill Publishing Company Limited. Price, 17s. net. The Manufacture of Carbide of Calcium. By C. Bingham. London : Raggett and Company. Price, 5s. net. The Journal of the Institute of Metals (Vol. 15), Edited by G. Shaw Scott. London : The Institute of Metals. Price, 21s. net. “ Investigation of the Peat Bogs and Peat Industry of Canada, 1913-14,” by A. Anrep (Bulletin 11 of the Mines Branch of the Canadian Department of Mines); “ The Journal of the Canadian Peat Society ” (Vol. 4, No. 2), June; ‘‘The London Chamber of Commerce Journal” (Vol. 35, No. 268), August, price 6d.; “ The Queensland Government Mining Journal ” (Vol. 17, No. 193), June, price 6d.; ‘‘The Employes’ Magazine ” (Lehigh Valley Coal Company), July; ‘‘Proceedings of the Engineers’ Society of Western Pennsylvania ” (Vol. 32, No. 4), May; “ The British Trade Journal ” (Vol. 54, No. 644), August, price Is.; “ Cassier’s Engineering Monthly” (Vol. 50, No. 2), August, price Is.; “ Prospectus of University Courses in the Municipal School of Technology, Man- chester, Session 1916-17”; ‘‘The Strength of Webs of I-Beams and Girders,” by H. F. Moore and W. M. Wilson (University of Illinois, Bulletin No. 86). Grimsby Coal Exports.—Returns for the week ended August 4 show that the following quantities of coal have been exported from Grimsby :—Foreign : To Dieppe, 904 tons; Rouen, 1,148; and Treport, 117—total, 2,169 tons foreign, against 5,742 tons foreign during the corresponding week of last year. Openings in Russia.—Relative to the mining industry of the Urals, and to possible openings for British trade, the British Vice-Consul at Ekaterinburg (Mr. T. H. Preston) has furnished the following information : Among the goods of which owners of mining works and properties in the Ural district would be likely buyers are mining machinery and supplies, including ore-reducing plant, hauling plant, tur- bines, electrical apparatus, steam engines, locomobiles, pumps, metallurgical plant, blowers, compressors, dredges, excavators, coking plant, diamond drills for rock and hand drills for placer prospecting, wagonettes and small rails and belting for power transmission. Frequent enquiries have been received at the British Vice-Consulate from United Kingdom firms as to the best way of obtaining some of the extensive business formerly done by Germany in the Urals. These enquiries are frequently accompanied by catalogues in the English language for distribution. As the British Vice-Consul has in the past on several occasions suggested to these firms, the best method is to form agencies, or to appoint agents already established in the Ural district. United King- dom firms which have entrusted their business to agents in the Urals have reason to be thankful for having done so, for Mr. Preston is informed by the local British agents in a large way of business that they are overwhelmed with orders which, although only some of them can be placed now, will certainly stand the first chance of being placed after the war. The names of the principal mining works and properties in the Ural district, together with a map of the Central Ural and Ekaterinburg mining district, as well as a list of the chief merchants of Ekaterinburg, w’ith a description of the goods they deal in, may be consulted at the Commercial Intelligence Branch of the Board of Trade, 73, Basinghall- street, London, E.C.