460 THE COLLIERY GUARDIAN. February 26, 1915. 2779. Rock drilling and like machines. J. H. A. Macadam and J. Thirl well. 2788. Manufacture of steel car wheels. E. Ramsden. 2790. Air purifying apparatus. T. L. Whitehead. (Maschinenfabrik Westfalia Akt.-Ges., Ger- many.) Complete Specifications Accepted. {To be published on March 11.) 1913. 25962. Apparatus for the treatment of peat. Brown. 28933. Reversing and braking of alternating current motors. Akt.-Ges. Brown, Boveri et Cie. 29908. Tools or cutter bars having taper shanks and tool holders or sockets therefor. Richards, Grayson., and Melsom. 1914. 830. Systems for automatically registering time, wages, and other costs in industrial works and the like. Dicker. (Heath.) 3344. Catalytic processes. Hagemann and Baskerville. 3542. Boring bits. Morgan, and William Gilpin, senr., and Company. 3707. Bumps, engines, and the like. Zwicky. 3886. Vertical coking retorts, carbonising chambers, or the like. Cochrane and Peel. 4791. Apparatus for carburetting air or enriching gas with volatile hydrocarbon for lighting, heating, and power purposes. Bull wood and Boss. 4971. Presses for pressing scrap metal into blocks. John Summers and Sons Limited and Summers. 5092. Safety mechanism for the winding gear of mines. Norton. 5668. Eyes for ropes, wires, cables, and the like. Beckett. 6958. Adjusting mechanism for roller mills. Thomas Robinson and Son Limited, Robinson, and Stevenson. 7282. Process for the production of motor spirit from heavy hydrocarbons. Hall. 10556. Method of and means for securing tubes in tube plates. Jackson and Symcox. 11033. Safety apparatus for pit cages and the like.' Cushion. 11152. Engine and like packing. Blick, and David Mosley and Sons Limited. 11165. Electrical energy supply installations. Lundberg, Lundberg, Lundberg, and. Pegg. 12990. Apparatus for washing coal or other minerals. Reid. 15396. Turbines or rotary motors. Hauer. 15476. Apparatus for enabling persons to work in irrespir- able atmospheres. Davis. 15611. Lubrication of rolls used in sheet metal rolling mills and the like. Jones and Richards. 16435. Apparatus for feeding pulverised or finely divided fuel or other material. Quigley. 20283. Shackles for use in coupling vehicles. Davies and Morgan. Complete Specifications Open to Public Inspection Before Acceptance. 1914. 16130. Controlling mechanism for fluid compressors. Pieper and another. 1915. 2083. Double acting two-stroke-cycle internal combustion engines. Eried. Krupp Akt.-Ges. Germania- werft. 2295. Hollow bricks. De Geofroy. ENEMY PATENTS. 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, 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 proprietor, the law does not apply. 2876/12. Grinding, crushing, etc.; roller mills. A mill for crushing sand, coal, coke, etc., consists of a bottom roll mounted in stationary bearings, and two or more upper rolls movably mounted upon one-armed levers adapted to swing freely about fixed or movable points, and being driven directly by mechanical means or by frictional contact with the mechanically-driven roll or rolls. R. Lechner, Germany. 10619/12. Magnetic separators. A magnetic separator com- prises a number of magnets rotating in front of a stationary induction ring, to which the material is supplied by rotating shoots, the material being washed off into channels in three grades by water jets from a series of pipes rotating with the magnetic system. Elektro- magnetische Ges., Germany (dated May 4, 1911). 10926/12. Deep boring. Bor remedying faults in boreholes in water-bearing strata, cement or the like is fed under pressure to the space between the boring rod and the wall of the borehole, and is forced into the faults by the counter pressure of water supplied through the hollow boring rod. G. Pauli, Germany. 11137/12. Separating liquids and solids. A settling well is provided with a bell and air tube, which, when it is desired to discharge the settled matter, is moved down by means of a crank and teeth, so that the bell seats tightly on a metal ring in the wall of the vessel, and shuts off the sedi- ment from the liquid above. A valve is then raised,- and the sediment passes away through a pipe. B. Kaibel, Germany (dated May 11, 1911). 11238-9/12. Grinding, crushing, etc.; crushers with vibrating jaws. E. Eriedrich, Germany. 11373/12. Chimneys; treating smoke. Smoke, etc., in factory or domestic chimneys is removed by a series of asbestos filters, between which are placed sprayers or receptacles for formic acid or a mixture of formic acid and formalin. Eorced or induced draught is used. The lowest filter is preferably near enough to the fire to become hot and to consume most of the soot. H. Munding, Austria. 11590/12. Eurnaces; firebars. A hollow stepped grate bar consists of a channel portion and removable parts forming the stepped fuel surface, which may be provided with vertical or horizontal air passages. P. Werger, Berlin. 11614/12. Treating sewage and foul waters. Waste water or sludge is treated with a material obtained by calcining minerals containing silicic acid, such as aluminium silicates, with exclusion of air, and treating the product with acid and a limited quantity of water, so that the silicic acid is converted into gelatinous form, or a form soluble in water. A specially suitable substance is obtained by treating clay. Richter and Richter, Germany (dated June 6, 1911). *** Copies of any of the above specifications can be supplied at the price of Is. post free. Applications for Orders of the Board of Trade to Avoid or Suspend Patents.— Cases Decided by the Board of Trade. No. and year of patent. Grantee. Applicant. Decision. 10859/01 Goldschmidt. (Welding W. L. Turner and Patent metals) H. A. Blackwell avoided. 24439/02 Goldschmidt. (Alu- W. L. Turner and Patent mino-thermal process) H. A. Blackwell avoided. 11206/05 Johnson (W. Feld). R. and J. Dempster Licence (Subjecting gases to the action of liquids Ltd. granted. 27415/11 Reinhard. (Props or stempies for mines) R. W. Lewis Licence granted. GOVERNMENT PUBLICATIONS. *** Any of the following publications may be obtained on application to this office at the price named post free. Boiler Explosions : Report for 1913-14, 3Jd.; ditto, Report (No. 2298), Boiler at Boston, 7Jd.; (No. 2341), at the Britannia Steel Works, 5Jd. Consular and Trade Reports : Tongon Islands Protec- torate, 1913-14, 2Jd.; Uganda, 1913-14, 2|d.; Nyasaland, 1913-14, 3d.; British Guiana, 1913-14, 2Jd. Labour Gazette, Eebruary, 21d. Railway, etc., Bills, Report, 1915, 4|d. Board of Education : Science Examination Papers, 1914, Is. Id. Railway Accidents : Summary for Three Months Ending September 30, 1914, lOd. PUBLICATIONS RECEIVED. Electric Bells, Alarms, and Signalling Systems. H. G. White. London : S. Rentell and Company Limited. Price, Is. fid. “ Transactions of the Institution of Mining Engineers ” (Vol. 48, Part 3), price 6s.; “ Lode Mining in Yukon : an Investigation of Quartz Deposits in the Klondyke Divi- sion,” by T. A. MacLean (Canada Department of Mines); “ The Copper Smelting Industries of Canada,” by A. W. G. Wilson (Canada Department of Mines); “Report of the Board of Governors of the Public Libary, Museum, and Art Gallery of South Australia for 1913-14 ” ; “ The Journal of the Chemical, Metallurgical, and Mining Society of South Australia ” (Vol. 15, No. 6), December- January, price 3s.; “Notes on South Wales Securities,” compiled and published by Ernest Sully and Company, Cardiff; “Monthly Bulletin of the Canadian Mining Institute ” (No. 34), Eebruary. The International Exhibition to celebrate the completion of the Panama Canal was opened at San Francisco on Saturday. CATALOGUES AND PRICE LISTS RECEIVED. A list relating to pump lubricators has reached us from Sir W. H. Bailey and Company Limited (Albion Works, Salford). It has a special interest, as it shows, by means of illustrations, the gradual development of the mechanically- worked lubricator over a period of 50 years. In the “ silver star ” lubricator, which is the culmination of this experience, a separate pump is provided for each delivery, also a pump feeding the chamber supplying the sight feeds. The pumps are positively operated both on the suction and delivery stroke, so that it is impossible for them to become inopera- tive. Valves only are used on the delivery side, and these, which are in duplicate, are readily accessible from without the lubricator. The firm also make a “ dial ” sight-drop lubricator, in which the number of drops of oil is regulated by means of an eccentrically-pivoted disc. A publication of more than ordinary interest has been forwarded to us by Messrs. Stewarts and Lloyds Limited (Glasgow and Birmingham), dealing with a subject that has at times excited much controversy, i.e., the relative advan- tages of steel and iron pipes. This great firm were the pioneers in the use of mild steel pipes in place of cast iron, and it is 21 years since they patented a process for forming a socket on lap-welded steel pipes, similar to the socket for lead and yarn jointing on cast iron pipes. This, known as Stewart’s patent inserted joint,” enables only the minimum amount of lead to be used. A notable improvement, induced by the modern transmission of gas at high pressures, is the use of welded joints. In these, a bell-mouth enables the pipes to be more easily inserted into each other, and pro- vides an extended surface and receptacle in which the fused metal is retained. It also enables the joint to be made without turning the pipes round. It is stated that even when the ground sinks to the extent of 3 ft. in the middle of a space of 100 yds., this welded joint has a factor of safety of six or more under the tensile stress involved. Bor branch services, Stewart’s patent branch service connection may be employed, or Woodall-Parkinson’s patent, fitting. The feature of the last-named is a screwed nipple, which is expanded into place by a tapered mandril, while the main is under pressure and without leakage. The pamphlet deals with many other points of interest to the user, such as the cost of laying pipes, corrosion, etc. Especially useful are some remarks on the methods of counteracting conditions having adverse influences on the life of iron or steel pipes. To obviate' internal corrosion, the addition of lime is recom- mended, to the extent of about three grains per gallon, or, if this proves to be only a partial remedy, the addition of a de-oxidising plant, consisting of a vacuum pump and tank, by means of which the water, in a finely divided state, is subject to a vacuum as perfect as possible, and so denuded of prac- tically all the free oxygen in it. The cost of treatment in either case may be from Jcl. to Id. per 1,000 galls. It is a notable fact that internal incrustation, which is due to corro- sion, itself constitutes a most effectual protection against further corrosion. It is one of the arguments advanced in favour of steel that corrosion is thus arrested in the case of steel pipes at a comparatively early stage, whereas the tuber- cular incrustation attains such a thickness in cast iron pipes before the corrosion is arrested, that 6 in. and even 8 in. cast iron pipes have been known to choke up completely in a few years. A greater enemy, however, is corrosion from without. Where alluvial deposits are to be traversed, a remedy is to put a good layer of good clay round the pipe before filling in; another method of neutralising the evils in ground known to be unusually bad is to utilise the protective influence of alkalies by surrounding the pipes with lime or cement, or to pour on top of them, before filling in, a thick solution of milk of lime. In any case, a proper coating should be applied to the metal, and experience has proved that a mixture of gas tar and oil in the correct proportions is cheaper than, and affords, when properly applied, a protec- tion as permanent and watertight as those containing, in addition, a proportion of natural asphalt or constituents of it, such as bitumen. In addition to dipping the pipes, they should be wrapped with hessian cloth saturated with hot solution. The booklet contains a standard specification for lap-welded steel pipes, and is embellished by numerous photographs of installations at home and abroad. The fate of the coal mines of the Pas-de-Calais has been the subject of much rumour and conjecture. The Germans have been in occupation of the Lens district since October 4, and it has been declared at different times that they had blown up and set on fire many of the most important mines. The Journal des Debats publishes some information sent about Christmas time by an engineer who has remained in the district which shows that fires took place among the mines at the beginning of the German occupation, but only the outer buildings and the machinery at the pithead were damaged. There is no truth in the story of explosives , being thrown into the mines. An attempt was made to get the miners to work in some of the pits, but a rumour getting about that the Germans were going to close the pits when the men were down, the miners hid and refused to appear when they were summoned. The same day the superstructures of the pits in question were set on fire. The Germans subsequently imported labour into the district and tried to get some of the mines working, but up to Christmas time they had had no success. The Germans publicly threaten to blow the mines up if they are driven out of the district. The “PROTO” Rescue Apparatus. THE ALL-BRITISH APPARATUS ---- is ----- THE SAFEST APPARATUS IN THE WORLD. No Injector employed. Always under positive pressure, therefore no danger of drawing poisonous air into breathing circuit. Our “BULLETIN” of actual work done in serious cases will be sent free on request For further testimony as to the efficiency of the 66 Proto,” please see Mr. J. R. ALLOTT’S paper read before the Institution of Mining Engineers on 5th June, 1913—copy sent free on request. SIEBE, GORMAN & CO. LTD., “NeptYns;»E. Telegrams—“ Siebe, Lamb, London.” Telephone No.—251 Hop. Agent for North America and Mexico-H. N. ELMER, 1140, Monadnoch Block, Chicago. “HAMON” PATENT Cooling Towers Hamon Bros. Belgian Engineers, 94, Rue St. Lazare, PARIS. AGENTS WANTED. |