726 THE COLLIERY GUARDIAN. April 14, 1916. extracting apparatus, gives a higher yield of oil than is pro- duced under ordinary conditions. Consequently, when such tar is distilled in the distillation plant, a much higher propor- tion of oil is given off than is the case with tar normally produced from the fuel. (Four claims.) 9038 (1915). Improvements in Portable Shields for the Protection of Miners while Timbering and Making Secure the Working Places in Mines. D. Douglas, 33, Aldergrove, Mouth Pleasant, Forth, Glamorganshire. — Relates especi- ally to improvements whereby, after erection, the shield may be advanced further into broken ground without exposing the workmen to danger from fresh falls. The shield proper is made of sheet iron or steel, of sufficient thickness to resist the impact of any falling matter. Its form in plan is an oblong, and it is arched. It is conveniently made about 6| ft. in length, and less in width than the roadway through which it has to travel. It is supported upon six legs, three being attached to a rod or bar riveted to one side of the shield, and three to a similar bar on the other side. The rio.i. rio.n. legs can swing to and _______________ . fro in the direction of its width, and can slide to’ cj /V and fro on the bar later- Jr* / V ally. As the shield may ’• ,r jf \Lb' have to be erected on in- | I // V dined, or very uneven and I | I broken ground, and set in any direction at varying angles to a horizontal plane, all six legs are made so as to be capable of extension or reduction in length while the apparatus is in use. Fig. 1 is a side view of the shield in elevation; fig. 2 represents the end elevation of the same. In fig. 1 the letter A marks the shield proper, the partially screw threaded upper legs are marked B, and shown as screwed or otherwise fixed in the T pieces C. The adjust- ing nuts marked E are shown resting upon faced flanges at the tops of the lower hollow legs marked B1, which terminate in flange covered points D. The bar or rod of oval section by which the T pieces are attached to the shield is shown in dotted lines, and marked G. In fig. 2 the legs B, B1 is shown partially telescoped, to meet the inequality in the ground, and preserve the level of the shield. (Three claims.) 10283 (1915). Improvements in Jigging or Shaking Conveyors. J. Jackson, of Brackley Villa, Little Hulton; S. Greenhalgh, of Gilded Hollins, Little Hulton; and A. Robertson, of 207, Morris Green-lane, Daub Hill, near Bolton.—Relates to jigging or shaking conveyors, and pro- vides improved means for reciprocating such conveyors, and also provides means adapted to operate the conveyor so as to transmit material in either direction at will. Fig. 1 is a plan view as applied to a conveyor; fig. 2 is a side elevation of the weight controlling devices at the end of the return or inward stroke, when acted upon by the engine; and fig. 3 is a similar view, with the force of the weight predominating at the end of the outward stroke. The conveyor is operated at any suitable point in its length, and, by preference, through the medium of the three-armed lever a, the connection between the lever and conveyor being preferably through a link rod b. The lever a is fulcrumed at c, one arm being connected to and operated by an engine e, through a rod or rope f secured to the piston g of said engine. The other arm .£/// / r h of the lever is connected to a weight i by a rope o through the lever I and rope n, the latter working over a pulley, fc. The weight i is connected by the rope n passing over the pulley k, to one end of the lever arm I, which is fulcrumed at m, as shown in fig. 2. The second rope o is connected, at one end, to the lever I at a point near the movable end of the same, while the other end of the rope is connected to the arm h of the lever a, suitable guide pulleys being provided if necessary. The advantage of using the lever arm I is that the resistance of the weight i is moderated at the time the conveyor is starting its return movement, the resistance gradually increasing as the angle between the rope n and the lever arm I decreases. The motor or engine acts in one direction only, that is to say, upon the return stroke, the conveyor moved outwardly by the force of the weight, so that by employing the arangement of three-armed lever a, and with the conveyor operating in a practically horizontal path, and by simply transposing the connections of the engine e and weight i with the respective lever arms, the conveyor may be caused to transmit material in a direction opposite to the normal. (Four claims.) 17989 (1915). Improvements in Rollers of Band Con- veyors. A. Sauvee and Company Limited, of 60, Park- street, Southwark, S.E.; and A. E. L. Boss, of 189, Coldharbour-lane, Camberwell, London.—Relates to a special construction of the bearings of the rollers of band conveyors, to permit of the self-aligning of the rollers when adjustment is effected, and consists essentially in the employ- ment of bearings having spherical centres for this purpose. Fig. 1 is a side elevation; fig. 2 a plan view; and fig. 3 an end view; fig. 4 is a transverse section on a larger scale, and showing the bearings of one of the rollers in section. 1 is the conveyor band which runs on the tops of an upper set of rollers 2, and returns along the tops of an under set of rollers 3, the two sets of which rollers are at their opposite ends carried in brackets 4 and 5 secured respectively to the upper and lower flanges of longitudinal channel iron ■ girders 6 and 7 supported at the required height at suitable intervals by transverse frames 8. The under rollers 3 may be more widely spaced than the upper rollers 2. The opposite edges of the band 1 between the upper rollers 2 run over horizontal bearers 9, 10 mounted on the bottom of the continuous side uprights 11, 12 constituting the sides or edges of the conveyor, and supported at the required height by arms or brackets 13, 14 secured to the top of the longi- tudinal channel girders' 6, 7. The brackets 4 and 5, preferably at one end only, are capable of longitudinal dis- placement, the holes in the flanges of the longitudinal side girder 7 through which pass the bolts 15 and 16 which secure said brackets thereto being elongated to the extent necessary to afford the required adjustment of the rollers in relation to the conveyor band 1. Each end of the shafts 17, 18, of the rollers 2, 3 is supported by a spherical bearing 19, 20, which is carried by a screwed pin or bolt 21, 22, working through the brackets 4, 5. The spheres are ’ preferably formed on the ends of the pins or bolts 21, 22 and engage corresponding seats in the ends of the shafts 17, 18. The brackets 4, 5, at one end only of the rollers 2, 3, are preferably capable of longitudinal adjustment on the side channel girder 7 (fig. 4), and the screw pins or bolts 21, 22 constituting the spherical bearings at this end are each pierced with an opening 23 constituting a grease receptacle, closed by an outer plug 24, and leading through to the seats which the spherical heads 19, 20 engage. The holes in the brackets 4, 5 for the screw pins or bolts 21, 22, are preferably elongated to permit of the vertical adjustment of said pins or bolts, and consequently of that end of the axis 17 or 18, of the roller 2 or 3, lock nuts 25 being provided through which the pins or bolts work, and which fix and lock them in the desired position. A spring washer 26 may be interposed between either the front or back, or both, of the lock nuts 25 and the bracket 4, 5. The seats which the spherical heads 19, 20 engage are also formed with recesses to receive a suitable lubricant, and spring washers are preferably interposed between the heads of the screw pins or bolts 21, 22 and the brackets 4, 5 through which they work. (Four 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.] Allsebrook, W. A. (5181). Manufacture of beta-naphthol. American Model and Instrument Company (5091). Electrical circuit systems. Ashton, H. N. (5001). Beta or alpha naphthol., Barber, F. (4970). Apparatus for filtering and purifying a.r. Barclay, W. R. (4855). Pyrometers for metallurgical and like operations. Basile, A. (4916). Borehole apparatus. Baumann, K. (5020). Steam turbines. Bhatt, T. U. (5055). Apparatus for lifting water. Board of Trade (4888 , 4889). Manufacture of glass. Bolling, G. H. H. (5029). Utilisation of pitch as fuel. British Thomson-Houston Company (General Electric Com- pany) (4940). Spur gearing. Bromell Patents Company (5163). Electrically indicating presence of saline, alkaline, or acid impurities in feed water for steam generators, etc. Carsalade, A. de (5013). Band conveyor for heaping materials. ; Clayton Aniline Company (5178). Process for purification of trinitrotoluene. Constable, H. L. (4936). Treatment for disintegration and separation of constituents of ores, metals, etc., and for combustion of minerals and earths. Crockatt, W. C. (5163). Electrically indicating presence of saline, alkaline, or acid impurities in feed water for steam generators, etc. Dickinson, M. (4936). Treatment for disintegration and separation of constituents of ores, metals, etc., and for combustion of minerals and earths. Fairholme, F. C. (4855). Pyrometers for metallurgical and like operations. Hamilton, W. L. (4833). Aerial railways and suspended ways and like haulage and conveyor installations. Hampson, F. C. H. (5001). Beta or alpha naphthol. Heyl, G. E. (5132). Reduction of ores. Heyl, G. E. (5133). Distilling shale, etc., oils. Heyl, G. E. (5134). Distilling coal. Heyl, G. E. (5135). Distilling oil. Kelsey, H. H. (4986). Dyestuffs and dyes. Malcolmson, N. (4986). Dyestuffs and dyes. Marchant, E. N. (5178). Process for purification of triJ nitrotoluene. Mowlds, G. J. (5155). Treatment of peat, etc. Nicol, E. W. L. (5193). Furnaces. Nyberg, C. S. (4883). Balancing split belt pulleys with exchangeable rims. Nyberg, C. S. <’4884). Split belt pulley. Onslow Syndicate (4917). Fire resisting materials. Schedler, A. (5178). Process for purification of trinitro- toluene. Stone, G. E. M. (4855). Pyrometers for metallurgical and like operations. Talbot, B. (4996). Manufacture of steel or ingot iron. Wale, A. E. (5120). Conveyor driving, etc., belts. Watkins, E. (4915). Chain links. White, A. E. (Riter-Conley Manufacturing Company) (5128). Charging gas retorts. Complete Specifications Accepted. (To be published on April 27.) 1915. 5019. Method of briquetting. Sutcliffe,' and Pure Coal Briquettes Limited. 6013. Reciprocating pumps. Finney. 7842. Shaker conveyors. Black. 9003. Miners’ electric safety lamps. Patterson. 9680. Apparatus for feeding pulverised or finely-divided fuel or other material. Quigley Furnace and Foundry Company. 10834. Rotary air and gas compressors. Willett. 11406. Artificial or block fuel. Faraday. 14780. Instruments for surveying drill holes. Galvin. 1916. [Note.—The numbers following the applications are those which the specifications will finally bear.] 624. Spraying or diffusing apparatus. A. Jackson. 100218 1408. Furnace bridges. W. H. Gould. 100214 1984. Apparatus for weighing heavy material during transit. H. D. Cheshire. 100217 PUBLICATIONS RECEIVED. Cassiers’ Engineering Monthly ” (Vol. 49, No. 4), April, price Is.; “ The Journal of the South African Institution of Engineers ” (Vol. 14, No. 8), March, price 2s. GOVERNMENT PUBLICATIONS. *** Any of the following publications may be obtained on application at this office at the price named post free. SPONTANEOUS COMBUSTION : MINUTES OF EVIDENCE AND INDEX, first to tenth days, 3s. Finance ; New Duties Bill, 2d.; Statement for 1916-17, 2d. Board of Education : Regulations for Special Grants, 1916-17, Id. Boiler Explosion Report, No. 2406, Water Tube Boilers at Messrs. Cammell, Laird and Company’s Pumping Station at Birkenhead, 4}d. Accounts of Trade and Navigation for March, Is. lOd. Gas Provisional Orders Bill, ljd. War Organisation in the Distributing Trades in Scotland, Second Report, Id. Trade in Imports and Exports at Irish Ports during 1914, llid. Statutory Rules and Orders, 1916 : No. 176, Customs, Order in Council, ljd.; No. 179, Munitions of War, Appeals in Scotland, IJd.; No. 180, ditto in Ireland, l|d.; No. 181, ditto, Employment and Remuneration, IJd.; No. 183, Customs, Proclamation No. 3, lid.; No. 184, Defence of the Realm, Order in Council, lid. Iron and Steel Institute. — The annual meeting of the institute will be held on May 4 and 5, at the Institution of Civil Engineers. Great George-street, Westminster, and the new president, Sir William Beardmore, will deliver his inaugural address. Several papers will be submitted for discussion. South Staffordshire and Warwickshire Institute of Mining Engineers.—The next general meeting of the institute will be held on Monday next, at 3 p.m., in the University, Birmingham. Mr. F. Meachem, M.I.M.E., will read a paper on “ Some Work in the Kent Coal Field,” with illus- trations. SMALLMAN patent HAULAGE CLIPS. New Model: Nine Sizes. Patented 1902, 1906 and 1910. Automatic Detachment. The 1911 lever has large lateral stops and a wedge-shaped head. Drop-forged shells (two sizes), levers (four sizes), catches and couplings. Illustrated Catalogue. Clips can be had without catches. Patentee and Sole Manufacturer:— JAMES W. SMALLMAN, Nuneaton, England. “THE SOUTH WALES COALFIELD .’’—PART III. By HENRY K. JORDAN. F.G.S (Past President and First Gold Medallist of the South Wales Institute of Engineers). rpHIS Paper completes the author’s monograph on the South Wales Coal-Field, and is published by the South Wales Institute of Enginers. It comprises 89 pages of printed matter, with a number of Sections inter- leaved, and the following large drawings which are issued separately:— 1. A Horizontal Section across the Carmarthenshire Coal-Field, from Pontyberem to the Sea near Llanelly. The Section is five feet in length, mounted on linen, and geologically coloured. 2. A Map on the Six-inch Scale of the Anthracite Area of Llan- non, Mynydd-Sylen, and Pontyberem. It also illustrates the Outcmpg of the Seams, Faults, &c. Three Sheets of Vertical Sections of the Deep and Important New Collieries that have been Sunk throug-hout the Coal- Field during- the Past Six Years. The Sections are drawn to a sca'e of 100 ft to 1 in., and the sheets are 40x27 in., mounted on linen. The first portion of the text deals with the anthracite area and with the Pennant seams to the north and west of Llanelly and Burry Port. The remaining portion discusses the new collieries in Glamorganshire and Monmouthshire, with much additional information which brings the subject up to date. A limited number of the above are for sale, price £ 2 2s. (postage extra), and may be obtained from THE SECRETARY, The South Wales Institute of Engineers, Cardiff. “The South Wales Coal-Field,” Part I., by Mr. H. K. Jordan, price £2 2s., dealing with the eastern half of the Coal-Field; and “The South Wales Coal-Field ” Part II., by Mr. H. K. Jordan, price £1 Is., dealing with the western half of the Coal-Field, maybe obtained from the Secretary.