686 1'HE COLLIERY GUARDIAN September 25, 1914. The conveyor head comprises two main drums A and B, both driven, and a deflector drum C, running light, or, if preferred, driven by a chain from A, as shown at X. The three drums naturally have the same peripheral speed, and conveniently they are of the same diameter. A and C are at the same height in the frame, and B is somewhat lower. The belt run is then as follows :—The upper loaded side runs on to C, clears B, and reaches A, where it discharges; empty, it returns under A, over B, and is deflected under C for the return. Power is furnished by an electric or other high-speed motor P, whose shaft is flexibly connected to a worm shaft with duplex right and left hand worms of quick pitch and high efficiency, engaging with corresponding worm wheels Ql Q2. The worm wheel shafts D E carry pinions F 0, meshing with internal wheels H K, mounted in the open ends of and driving the drums AB. As dimensions are usually very much circumscribed, it is desirable to make F G each carry one-half of the total load, and with this end equalising gears L M on the worm wheel shafts D E inside the worm gear case to a ball or other thrust bearing on the worm shaft is preferred. All gears should be machine cut. The equalising wheels inside the oil bath ffear case are per- fectly protected and lubricated. The second motion gears f/f. / operate at a low speed, and being inside the belt drums, are completely guarded, and fairly well protected from dirt. The whole arrangement therefore conduces to silent opera- tion, it is safe, and but little liable to wear. The three drums are preferably carried on fixed spindles (not shown), with bushes in the drum ends like loose pulleys. With the bearing inside the drums, the width, of the structure is correspondingly reduced, and the spindles are readily carried between two thin deep side plates NO. By using thick walled tube for the spindles, with one end closed and a screwed plug at the other end, grease can readily be fed up to both bearings as required. The side plates are strongly braced together by tie bolts and stiffening plates, and are provided with angle skids (not shown). Either plate serves as an attachment for the electric motor P, which is bolted on sidewise (wall-type) without horizontal base plate, and for the duplex worm gear box Q, which is made reversible, end for end, and has two couplings, so that it may be attached to either side of the drum frame—making a right or left hand conveyor head, as may be required. The end frame type electric motor, with a single shaft end, may be similarly transposed by turning the bearing frames through 180 degs. To facilitate the use of a standard machine for either R H or L H use, the two side plates are drilled, bored, and tapped exactly alike, and it is found convenient to locate the tubular shafts in plain holes, securing them by clamp plates over small shoulders. (Seven claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 19750. Hydrocarbon oils from bituminous coal. F. C. Blythe. 19768. Elevating trucks. H. Wade. (W. J. McCallum and W. Chambers, Canada.) 19775. Fluid pressure engine, pump, or the like. P. G. Tismer. 19786. Valve apparatus for percussive rock drills, tools, and the like. G. Rayner. 19790. Couplings for chains, rods, and other articles. D. Porter. 19807. Foundry plant for facilitating the manipulation of pouring vessels for molten metals. Morgan Crucible Company Limited, and L. C. Harvey. 19809. Process for producing the lining of an electric induc- tion furnace. G. Brustlein. 19823. Means for superheating steam. W. Horabin and P. R. Kuehnrich. 19829. Hydraulic rock and the like drills. J. Hanson. 19830. Rotary apparatus suitable for use as engines, pumps, meters, and the like. J. R. Duncan. 19831. Haulage clip for coal or other hutches or corves. D. Galbraith. 19833. Means for lubricating axles, such as those of loco- motives, tenders, carriages, wagons, and tram- cars. H. Hobson and A. Morris. 19847. Gas washers. C. E. Pope. 19854. Electric signalling systems, particularly for use in mines. Sterling Telephone and Electric Com- pany Limited, and H. W. Barclay. 19858. Method of manufacturing reinforced concrete props or supports, such as are used in coal or other mines, and for any other purpose for which they are suitable. J. F. Wake. 19884. Process of distillation of crude petroleum. S. W. Whitmore. 19896. Rotary engines, pumps, and blowers. H. Levin and J. Robertson. 19905. Washing and automatic loading appliance for china clay pits and the like. S. J. Willey. 19914. Measuring vessel for use in connection with analytical operations. H. Zellner. 19933. Binding compounds for briquetting and the like. A. C. Evans and P. J. Mitchell. 19954. Apparatus for the manufacture and treatment of gas. W. Climie, junr., and W. Lees. 19967. Collapsible gates and the like. C. B. Lawson. 19968. Method of drying out cable joints and the like. W. Fennell. 19969. Colliery tubs and other light railway wagons. G. A. Allen. 19971. Means or apparatus for bunkering coals into passen- ger steamers and the like sea-going vessels. G. Alder. 19976. Recovery of metals from slags. C. Vautin. 19982. Grinding mills. E. F. McCool. Complete Specifications Accepted. (To be published on October 8.) 1 1913. 5460. Devices for measuring temperature. Mellin. 17838 and 17839. Methods for converting higher boiling petroleum hydrocarbons into lower boiling petro- leum hydrocarbons. Gray. 19841. Drilling engines. Holman and Holman. 19963. Automatic couplers for railway carriages, wagons, and the like. Johnston. 20334. Overwind and overspeed prevention gear for colliery winding and like engines. Lockhead. 20767. Treatment of coal tar or its products for the removal of the properties therein tending to induce pitch cancer. Robinson. 20902. Internal combustion pumps. British Thomson- Houston Company. (General Electric Company.) 21005. Toothed gearing. Marsden, and Power Plant Com- pany. 21224 and 21225. Centrifugal fans or pumps. Davidson. 26158. Railway chair. Whittington. 26397. Tipping vehicles. Constable. 28271. Elastic fluid turbines. Rearick. 29089. Producer gas generators. Wollaston. 30010. Corve pedestals. Cobb. 1914. 4509. Water injectors as applied to economisers. Hiller. 9986. Screening apparatus for ores and the like. Megraw. Complete Specifications open to Public Inspection before Acceptance. 1914. 4220. Support for the heat conductor of thermic telephones and a method for its manufacture. De Lange. 9733. Car trucks. Brooks. 17643. Power generating systems. Schmidt. 18473. Furnaces. Chantraine. 18810. Electric primers. Lindsay. 19678. Grate with automatic means for charging it and removing the slag. Brams. 19846. Gas generator for gas turbines. Riesco. Applications to Avoid or Suspend Patents ob Licences. No. and year of patent. Grantee. Name and address of applicant. Date of hearing. 20922/12 “ Vulkan ” Maschinen- fabriks Akt.- Ges. (Electric magnetic clutches.) Glenfield and Kennedy Ltd., Kilmarnock, Ayr, N.B. Oct. 8 23150/12 Marks (“ Vulkan” Maschinen- fabriks Akt.- Ges.) (Switches for electro- magnetic clutches.) Glenfield and Kennedy Ltd., Kilmarnock, Ayr, N.B. Oct. 8 6236 01 Custodis. Round chimneys.) A. L. Tester/63, Queen Vic- toria-street, London, E.C. Oct. 8 8979'13 Nod. (Re-facing valves and valve-seats.) M. B. Mountain, 66, Victoria- street, Westminster Oct. 9 CATALOGUES AND PRICE LISTS RECEIVED. The Chicago Pneumatic Tool Company issue a bulletin dealing with their Class A-0 “ Giant ” fuel oil engines. We have received from Messrs. Herbert Morris Limited (Empress Works, Loughborough) a list of worm and spur- gear pulley blocks, winches, jacks, gravity lowering pulley blocks, rope blocks, chain slings, electric cranes, and travelling cranes, which they now have in stock for imme- diate delivery. Messrs, the St. Helens Cable and Rubber Company Limited (Warrington) issue a novel advertising leaflet deal- ing with their patent cab-tyre sheathed cables, with special reference to flexibles for hand lamps, portable tools, etc. The leaflet is in the form of an illuminated address, and would embellish the walls of any office. The Adnil Electric Company Limited (Adnil-building, Artillery-lane, E.C.) send us a small booklet giving a brief description of the outstanding characteristics of the “ Century ” single-phase self-starting motors, with illustra- tions of typical applications. These motors develop a start- ing torque of not less than 250 per cent, of full load torque, with approximately 250 per cent, of full load current, and ■come up to speed within five to 15 seconds under load. Messrs. James Keith and Blackman Company Limited (27, Farringdon-avenue, E.C.) forward a small catalogue of Keith centrifugal fans. This shows arrangements for belt and direct drives, and gives details of the fan runners. The vanes in the latter are curved, with their outer and inner edges pointing in the direction of rotation, and the external diameter over the vanes constantly decreases from shroud to backplate, while the inner edge slopes still more rapidly from the inlet to the central boss, which is strongly secured to a heavy sheet steel backplate, on which the vanes .are mounted, the inlet ends being bound by a steel shroud ring. This arrangement of the vanes ensures the even dis- tribution of the discharged air over the entire periphery of the runner. The “ Keith ” fans are generally of the single inlet type, but, where the conditions are suitable, double inlet fans can be supplied. The sizes quoted range from 5 to 60 in., but larger fans are also made. A handsome pamphlet has just been issued by Bonecourt Surface Combustion Limited (Parliament-mansions, West- minster, S.W.), giving very full information on the subject of the Bonecourt system, and incidentally much valuable matter in regard to combustion generally. In addition to reproducing some of the lectures, etc., delivered recently by Prof. Bone, and illustrating the varied applications of the system, there is a carefully compiled chapter on the science of combustion, and the details of several tests carried out at Skinningrove and elsewhere. The Bonecourt boiler has up to the present found its principal application in the utilisa- tion of various gaseous products, such as coke oven, blast- furnace, town gas, and oil fuel, but it is stated that, although a Bonecourt boiler fired direct with solid fuel is not yet a fait accompli, the results which have been attained in this direction afford hope of a highly useful result being obtained at no distant date. It may be added that a battery of three Bonecourt boilers to be fired with producer gas is in process of installation in this country; two have already been erected, and will shortly be in operation. Messrs. Crompton and Company Limited (Chelmsford) have issued a list dealing with continuous current motors of the protected type up to 50-horse power. These motors are provided with openings in the end brackets and frame, and the temperature rise after six hours’ run at full load does not exceed 72 degs. Fahr. Ventilating ducts are arranged in the armature core to secure sufficient ventilation. All motors are fitted with interpoles, and with fixed brush position, are capable of developing 50 per cent, overload. By shunt regulation, motors can be run at their rated outputs up to double the listed speed, provided that the top speed does not exceed by more than 50 per cent, the maximum speed listed for a given size. By the same means a much wider range of speed can be secured. They can also be pro- vided with compound field winding. For use in mines, etc., protection can be further provided in the form of expanded metal or single gauze over all openings in the end cover, and for damp or dusty situations motors of the totally enclosed pipe-ventilated type are supplied. This type of machine is usually arranged with a fan mounted on the armature shaft, suitable bearings being provided on the motor, to which are attached the flanges of the ventilating pipes. Drip-proof motors can also be supplied, and a special line of intermittently rated protected and totally enclosed motors has been designed for use with cranes, haulages, etc. Immingham Coal Exports—During the week ended September 18 the coal exported from Immingham totalled 28,436 tons to foreign destinations, and 1,750 tons coastwise, as compared with 44,750 foreign during the corresponding week last year. Shipments were as follow :—To Aalborg, 2,014 tons; Bundholm, 1,969; Gefle, 7,089; Gothenburg, 5,337; Havre, 713; Helsingborg, 1,538; Lemvig, 942; Middlefahrt, 2,815; Odense, 946; Ronne, 1,477; Rotterdam, 2,696 ; and London, 1,750. Oxygen Resuscitating Apparatus. The Safest and Most Reliable Means of reviving persons apparently asphyxiated is to administer Oxygen by a simple form of apparatus, as shown, and at the same time use the Schafer method of resuscitation which is known to all St. John Ambulance and Red Cross Students. 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