824 THE COLLIERY GUARDIAN. April 18, 1913. flange a2 from the arm carrying the other flange is equal to the length of the short arm A1 plus the thickness of the wall thereof. As will be seen at once from fig. 1, the piles can then be joined up in such a way that when so joined each pile embraces with its two flanges a2, the two short arms A1 of the adjacent pile and reliably guides it. If the c 4- piles be pointed at their lower ends for the purpose of facilitating their penetration into the earth, a point of cruciform cross section is produced, which naturally possesses great strength. (Five claims.) 24436 (1912). Improvements relating to Mills for Pulver- ising or Grinding Slag, Ore, Rock or similar Material. (A communication from abroad by Bradley Pulveriser Company, of 92, State-street, Boston, Suffolk County, Massachusetts, U.S.A.) D. M. Clark, of the firm of Wm. Brookes and Son, of 55-56, Chancery-lane, London, W.C.— This invention relates more particularly to mills for pulverising or grinding rook, ore, slag, or other refractory material by the action of a suspended revoluble roll having a gyratory action with relation to the suspension means ^therefor and which co-operates with an annular die. The invention has for its main object the production of a simple, strong and durable means for connecting the roll-shaft with the cross-head, the construction and arrangement being 551 ____ 52 O O O . o © O o i o T---0 such that the operation of the mill acts constantly and automatically to tighten the connection between the shaft and the cross-head. Fig. 1 is a view in elevation and section of a sufficient portion of a grinding mill of the type referred to, with a practical form of the invention embodied therein; fig. 2 is an enlarged top plan view of the cross-head from which the roll shaft is suspended, showing the seats for the shaft retaining member; fig. 3 is a right-hand-side elevation of the cross-head, the tapered end of the roll shaft and the retaining member therefor being shown by dotted lines; and fig. 4 is a vertical section of the cross-head taken through the centre thereof on the line 4—4, fig. 3. (Four claims.) The first round of the competition for the Wood shield* annually competed for by teams representing the ambulance brigades of most of the Yorkshire collieries, took place in the various centres on Saturday afternoon. For the purposes of the contest the county is divided into the Southern and Western sections, the teams in each of which competed together on Saturday for the privilege of entering the second round, which takes place on April 26, the final being fixed for May 17. The first two teams in Saturday's competitions go into the next round. The third teams win Divisional Committee's prizes. Results:—Castleford Dis- trict (seven teams competed) : (1) Allerton By water No. 2; (2) Ackton Hall. Botherham District (eight teams) : (1) Silverwood No. 1; (2) Roundwood No. 1. Tankersley district (nine teams): (1) Elsecar No. 2; (2) Elsecar No. 1. Womb well District (six teams): (1) Hickleton Main; (2) Manvers Main No. 1. Barnsley District (five teams): (1) Woolley No. 1; (2) Woolley No. 2. Doncaster District (seven teams): (1) Brodsworth No. 1; (2) Maltby No. 1. Leeds district (nine teams) : (1) Garforth No. 1; (2) Robin Hood No. 1. NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 8080. Siemens and other regenerative furnaces. A. Banon. 8097. Props and the like, particularly adapted for use in mines. Mavor and Coulson Limited and M. Mackay. 8116. Engine or pump with constant and direct stroke. G. Newman. 8139. Couplings for colliery trams or the like. W. Doughty. 8150. Pipe couplings. W. H. Huggins and J. M. Huggins. 8223. Furnace grates of steam generators and the like. J. M. Neil and J. S. Neil. 8256. Windlasses, capstans, winches, cable lifters, and other hoisting machinery. Clarke, Chapman and Co. Limited and W. A. Woodeson. 8290. Steam boiler and other furnaces. W. C. Gotland. 8292. Portable drills. H. Wade. 8296. Multicylinder gas engines driving multicylinder air compressors or blowers. T. Mohn. 8320. Valve apparatus for percussive rock drills and the like. G. Rayner. 8321. Steam distributing valve for direct-acting steam pumps. J. Gourlay, C. M. Jackson, and G. K. Johnstone. 8392. Hydraulic or pneumatic wedge for mining and the like. J. H. Lewis. 8437. Miners' safety lamps and ignition devices in con- nection therewith. E. A. Hailwood. 8444. Miners' safety lamps. J. J. Cooke. 8457. Method of coal-cutting by air-driven machines. F. G. Herdman and T. E. Thain. 8461. Explosives. F. E. W. Bowen. 8465. Sheet metal and the manufacture of the same. O. Williams. 8469. Process for protecting storage batteries and cells against shocks and knocks and for preventing the disaggregating of the active substance of the plates. F. Sablon. 8474. Crucible and melting-pot furnaces. L. F. Tooth. 8477. Method of and mills for rolling seamless tubes. O. Briede. 8485. Magnetic separators. H. J. H. Nathorst. 8490. Process for casting and then forging or rolling ingots or other casting, from two or more metals, metallic alloys, or the like. F. Melaun. 8524. Vertical retorts for use in the manufacture of gas or for like purposes. Drakes Limited and A. Dobson. 8525. Extracting or discharging mechanism for gas retorts and the like. H. J. Toogood and Robert Dempster and Sons Limited. 8530. Explosives for use in coalmining and the like. G. Carew and British Westfalite Limited. 8538. Volatilisation and solution processes for recovering tin and other metals from ores, tailings and other metal-bearing substances. H. Dixon. 8545. Abrasive composition rollers for use in reducing material by crushing, grinding, rolling and the like. J. G. Jackson and J. G. Jackson Limited. 8546. Abrasive composition rollers for use in reducing material by crushing, grinding, rolling and the like. J. G. Jackson and J. G. Jackson Limited. 8547. System of and electric control for track switches of tramways and the like. R. Cumming. • 8549. Fuel and by-products. G. J. Epstein. 8552. Haulage clip. F. Smith. 8553. Railway wagon brake. E. Nelmes. 8559. Non-conducting coverings for steam pipes and the like. B. Chambers. 8560. Rock drill chuck. M. T. Taylor and J. F. Gardiner. 8575. Manufacture of fuel. E. Symonds. 8583. Explosives. H. P. Bostaph. 8610. Draw-bar cradles for wagons. P. A. Hyde. 8619. Miners' lamps. A. E. Williams. 8635. Roasting furnaces for ores and the like. C. Gabrielli. 8652. Lifting hook. Meadow Foundry Company Limited and T. Wass. 8660. Process for the production of oil from peat and other organic substances. K. E. Edgworth. 8661. Apparatus for boring and drilling wells and similar purposes. W. Harker and J. W. Cable. 8672. Process and apparatus for the direct production of steel from iron ore. L. Tejero and E. A. Boivie. 8673. Combustion of combustible mixtures. H. Edmunds and Boneeourt Surface Combustion Limited. 8674. Combustion of combustible mixtures. H. Edmunds and Bonecourt Surface Combustion Limited. 8678. Centrifugal pumps. B. Gerdau. Complete Specifications Accepted. To be published on May 1. 1912. 5601. Apparatus for the automatic and continuous analysis and indication of gases. Boulton. 8246. Method of forming briquettes of fine granular mate- rials for metallurgical purposes. Boehm. 8426. Treatment of sulphurous ores. Fusina. 8486. Pyrometers. Rogers. 8514. Ventilating and other fans. Trautmann and Copping. 8648. Automatic coupling for railway vehicles. Murphy. 9282. Fluid-pressure motors of the rotary type. Eisner. 10632. Truck tipplers, or means for discharging the contents of trucks and like vehicles. Provay. 10881. Pumps. British Thomson - Houston Company * (General Electric Company). 11601. Turbines. Hutson and Ford. 12926. Centrifugal governors. Bellis and Morcom Limited and Walshe. 13852. Methods and apparatus for performing tunnelling, boring and like operations. Marks (Ebbley). 14234. Process for casting steel in several layers. Imray (Akt.-Ges. der Briansker Schienen-Eisenhutten- werke und Maschinenfabriken). 15690. Manufacture of alloys. Naylor and Hutton. 15822. Machines for cutting metal bars or the like. Clifton and Baird Limited and Clifton. 16211. Weighing machines. Denison. 17543. Preparatory refining furnaces adapted to be supplied direct from the blastfurnace in the manufacture of steel. Bernhardt. 17995. Moulds for bricks and other blocks. Chapman. 18082. Continuously - operating annealing furnaces for metals. Kugel. 18148. Open-hearth furnaces adapted for use with blast- furnace gas. Poetter Ges. 18574. Manufacture of boiler stays. Huntington and Preston. 21666. Pile plankings of rolled iron. Schiffler. 23440. Devices for removing excavated material. Marks (Ebbley). 23840. Air compressors. Francois. 25835. Supporting frames for apparatus for boring holes in mines. Meyer. 26681. Device for automatically stopping electric hoists. British Thomson-Houston Company. 28933. Pulverising mills. Clark. 29586. Cable-ways. Bleichert and Co. 1913. 1382. Apparatus for purifying, cooling and washing gases. Theisen. 2002. Manufacture of sulphate of ammonium. Vis. Complete^Specificationsj open to Public Inspection before Acceptance. 1912. 15252. Liquid fuel furnaces for melting metals and their alloys and for other metallurgical operations. Etienne and others. 21174. Method for temporarily closing gas mains and the like. Toon. 1913. 4183. Sifting apparatus. Coppee. 7154. Pneumatically-operated tools. Jagdmann. 7317. Apparatus for automatically regulating the flow of gases in conduits. Apparate-Vertriebs Ges. 7704. Centrifugal pumps. Gentil. 7758. Controlling tapped turbines. Bergmann-Elektrici- tats Werke Akt.-Ges. 7783. Turbine pump or compressor. Lawaczeck. 7925. Smoke - consuming and fuel - economising devices. Johns. PUBLICATIONS RECEIVED. South African Engineering Standards Committee. No. 1. January 1912. “ Standardisation of Coal Sampling." Johannesburg : The Committee. Price 2s. 6d. net. Ditto. No. 2. May 1912. “Standardisation of Coal Analysis, Determination of Calorific Value, and Stan- dardisation of Sizes of Coal." Johannesburg: The Com- mittee. Price 2s. 6d. net. Ditto. No. 3. January 1913. " Lime." Johannesburg. The Committee. Price Is. net. The A.B.C. Guide to Patents for Inventions. By Robert E. Phillips and A. Millward Flack. London s Butterworth and Co. Price 2s. 6d. net. " Le Mois Soientifique et Industriel" (No. 163), March, 2 fr. ; “ Australian Mineral Statistics," published by the * Austra- lian Mining Standard,' price2s. 6d.; “Mines Department of the Union of South Africa, ‘ Statistics for the month of February”'; “Peru To-day" (Vol. 4, No. 2), February, price 5d.; “ Annales des Mines de Belgique" (Tome 18, No. 2); “ The Resources of Tennessee" (Vol. 3, No. 2), April, published by the State Geological Survey; “ Bulletin de la Societe de d'Encouragement pour 1'Industrie Nationale " (Tome 119, No. 3), March; “ Seventh Annual Statement of the Trade and Shipping of the Union of South Africa and of Southern and North-Western Rhodesia, 1912." GOVERNHEHT PUBLICATIONS. •% Any of the following publications may be obtained on application to this office at the price named post free. Patents, Designs and Trade Marks: Report, 1912, 3£d. Bills, 1913: COAL MINES CONSOLIDATION, Is. 4d.; Housing of the Working Classes, 2|d. Crown Lands Bill : Report, Id. SQUIBS COMMITTEE : Report, lid.; ditto, Evidence, 8fd. Education (Scotland) Report, 1912-13, 4d. University Education of London: Commission Report, 2s. 4d.; Ditto, Appendix to Report, 2s. lOd. Census, Ireland : General Report, 1911, 5s. 8d. Navy Coaling Accidents, 1910-12, Id. Partnership Dissolved.—The London Gazette announces the dissolution of the following partnership:—T. Phillips, D. T. M. Jones, T. Roberts and D. E. Jones, carrying on business as brick manufacturers, at Cynghordy, in the county of Carmarthen, under the style of the Cynghordy Metallic Brick Company, so far as concerns D. E. Jones. Glamorgan County Council: Summer Mining School in South Wales.—Short courses have been arranged by the Glamorgan County Council for three weeks during the month of August at University College, Cardiff, and the County School, Penarth. These include:—(1) A surveyor’s course at Penarth; (2) an engineer's course; (3) architects’ and builders' courses; (4) a teachers' course in geology, physics and chemistry, specially arranged to meet the requirements of teachers engaged in or preparing for work at evening schools or technical classes; (5) a special evening course in the electrification of collieries. One hundred hours' instruction will be given in courses 1, 2, 8 and 4. Penarth, with its beautiful sea frontage, is a delightful place for a summer holiday.