210 THE COLLIERY GUARDIAN. January 23, 1914. ABSTRACTS OF PATENT SPECIFICATIONS RECENTLY ACCEPTED. 264 (1913). Improvements in Crushing, Pulverising and Disintegrating Machines. The Patent Lightning Crusher Company Limited, of 29, Mincing-lane, London, H. T. Tovey, of Fairlawn, Ash wood-road, Woking, Surrey, and A. D. Furse, of The Gables, St. James’-avenue, Becken- ham, Kent.—Relates to pulverising or disintegrating machines of the type in which hammers or beaters are driven round preferably in conjunction with a shaft and one or more rotating discs, and in which the material when disintegrated usually passes through a screen. Fig. 1 is a front section of a disintegrator and fig. 2 a side section of the same. The machine consists of a casing A which may be divided into two parts, the upper casing containing a hopper for feeding the machine, and the plates and blocks B, B1 and B2 against which the material to be disintegrated is hurled by the rotating hammers C. The lower casing contains a shaft D joined to one or more rotating discs E, which carry one or more hammers or beaters C ; it also contains a screen E for the disintegrated material to pass through. This screen F is made of bars H or Hl called sizing bars, which may be supported by a cradle made of bars L, L1 and L2. The hammers C are made of bars bent inwardly towards their extremities and connected at their extremities by the bolts G with the rotating disc or discs E ■ Fiq 1 Side. 5E.ctioh OF D lOir-iTECtHATOR FICc-f PROMT SECTION OF DISINTEGRATOR as described in Patent 16462/1906 ; but in the present case they need not be so connected as to be in a straight line parallel to the rotating shaft D, but may be twisted obliquely towards the back of the casing, so that the bolts by which they are connected with the rotating discs be not facing each other, but one bolt be more forward than the other, the object of this shape of the beaters being to enable them to give a slicing, in lieu of a front stroke. The screens are made in several ways according to the required degree of fineness of the material to be disintegrated. They are made of parallel bars H, extending as a rule latitudinally along the whole width of the disintegrating chamber. The bars are constructed with two or more projections (in plan), the projections serving to form a hole or slot through which the material finds its way after having been disin- tegrated. All these H or H1 bars are reversible and can be turned over, and those with projections on one side only can be placed either with the projections all in the same direction as in fig. 1 or facing each other, in which case the size of the holes or slots will be doubled. For coarse crushing comparatively thick bars are used. Each of these bars may form a separate and detachable item, or all the bars may be firmly fixed together so as to form a solid cradle. (Five claims.) 1355 (1913). Improvements in Winding and Haulage Drums. C. Davenport, of the Aztec Works, Neepsend, Sheffield, Yorkshire.—The accompanying drawing is a longitudinal sectional elevation of the improved winding apparatus. As the engine with its frames or discs revolve round the shaft, motion is transmitted by the pinion i, wheel j, and shaft k to the pinion n, and thence to the internal gear o, attached to or formed on the cheek of the drum itself; the diameters of the wheels may be so proportioned that for every revolu- tion of the cylinders round the crank shaft, the winding drum will make correspondingly less number of revolutions. The cheek a2 of the drum on the inlet side is likewise carried on a sleeve m2, the inner end of which sleeve is bored so as ' 9' to’form a gland or receptacle ?n3, into which is placed a spiral spring p, with a retaining ring or washer q, so placed as to act against a tapered bush r inside the boss of the disc on the inlet side, and which is allowed to slide longi- tudinally, but is prevented from turning round by a feather key r1, fastened in the periphery of the bush, and by this means take up any wear that will take place. Through this bush the inlet and exhaust ports g and h are drilled to make the connections between the several inlet and exhaust ports which are formed in the cylinder frame or disc. The hollow or port end of the crank shaft is coupled up to a two-way valve or cock s, which is provided with the necessary inlets and exhaust outlets, and which is so arranged that by manipulating its handle or lever either of the two inlet ports in the crank shaft can be used for admission or exhaust purposes, thereby reversing the direction of rota- tion of the engine and drum. There is also a suitable brake ring u, with lever or screw action brake v, as commonly used on haulage drums. By the arrangement described, the whole of the working parts are enclosed in a dust- and dirt-proof chamber, and may be lubricated from a bath of oil supplied through a passage formed in the centre of the opposite end of the crank shaft to that which contains the inlet and exhaust ports, or by any other convenient means, thereby giving splash lubrication in the drum and saturating the engine itself as the drum revolves. (Five claims.) 5069 (1913). Improvements in Mills for Grinding, Crushing, Pulverising, Separating, or Mixing Materials. Edgar Allen and Co. Limited, Imperial Steelworks, Sheffield, H. Grey, 54, Oxford-street, Rotherham, and L. D. Parker, 21, Harbord- road, Woodseats, Sheffield.—Relates to mills of the vertical type, for grinding, crushing, pulverising, separating or mixing materials, such as are commonly known as ball mills, in which the material to be treated enters near the centre of a single stationary grinding track, and in which balls are usually driven round by a series of arms secured to a vertical shaft. Sometimes a series of fan blades attached to revolving arms draws the pulverised material from the grinding track and projects it through a screen from which it falls through an annular passage and is swept out of the mill by revolving scrapers. In the improved mill, the ground material is separated by means of air, without the aid of screens, which have always been a source of trouble due to their becoming clogged and also being subject to rapid wear. Fig. 1 is an elevation of the improved mill, half being in section ; fig. 2 is a sectional elevation of the grinding track showing a modified form of construc- tion; fig. 3 is a plan of same with top stationary track removed. By the improved arrangement the material being ground, falls, by gravity, on the revolving track c, and is carried outwards under the balls and up to the top of the revolving track by the centrifugal force caused by rotation. To the top of the stationary track are fixed a number of curved scoops g, which cause the ground material to be scooped from the inner upper surface of the bottom track and thrown upwards. By this means there will be a constant upward flow of fine and partly-ground material thrown under a fan h, mounted on a hollow-circular casing h1, which is fixed to the vertical shaft above the stationary track e. This fan h revolves at a higher speed than the balls and ejects the fine product at its periphery, the coarse material which is rejected by the fan falls back towards the axis of the mill and is again passed under the balls. The fine material then settles downwards on account of the lower pressure due to the larger area of the casing, and the air circulates around under the fan to the centre, in the manner indicated by arrows on the drawing, so that the same air is going round and through the fan, carrying with it and depositing a certain amount of the finely-ground material, which falls to the bottom of the casing of the mill through an annular passage or passages i. The fineness of the finished ground material is regulated by the draught of the fan, which is governed by an adjustable circum- ferential curb or damper j. The air circulates from the centre of the mill below the feed inlet k through the fan and back again underneath the fan into the grinding chamber. Some small portion of the material which has been ground settles down between the revolving track c and the surrounding framework; this, if allowed to accumu- late, would tend to retard the movement of the revolving track, scrapers I are therefore provided attached to the revolving track which move the ground material along until it reaches the outlet m, and passes into a suitable receptacle. (Two claims.) FBF9463 (1913.) Improvements in Earthing Clips for Metallic Covered Electric Cables. F. de B. Hart, of Hamilton House, Victoria-embankment, London, E.C., and the Anchor Cable Company Limited, engineers, of Anchor Works, Leigh, Lancashire.—Relates to an earthing clip which can be readily attached to existing pipes of varying dimensions. The device is illustrated in the accompanying drawing in which the earthing clip is shown in position round a piece of pipe. Fig. 1 shows the side elevation, while fig. 2 shows asection through the clip on the line A B. Fig. 3 shows a side elevation of the locking plate, and fig. 4 shows a plan of the flat earthing strip before being bent in position. (Two claims.) 21860 (1913). Improvements relating to Portable Breathing Apparatus. Detlef Carl Heinrich Schumann, and Hanse- atische Apparatebau-Gesellschaft, vorm. L. von!Bremen and Co., mit beschraenkter Haftung, both of Rbdingsmarket 35, Hamburg 11, Germany. Relates to portable breathing apparatus of the type wherein the exhaled air flows through a chemical purifier or regenerator prior to being re-inhaled. The invention consists in improvements in means for coupling the purifier or regenerator with the air-circulating system. Screw couplings are used for connecting the purifying device to the air pipes, these couplings having members sliding on the pipes, connected r IJIIllll iiiitiii to spring pressed valves which are normally held against the outer faces of the pipe orifices by their springs, but are lifted from these faces by screwing up the couplings. One of these valves is also associated with an auxiliary valve, so that when the former is closed, the latter is opened and enables circulation of air to take place through a by-pass or branch pipe while the purifier is removed. The invention is diagrammatically illustrated, in section, in the accom- panying drawing, in which I designates the regenerator or purifier, u the air pipe leading from the face-mask or helmet to the purifier, and m the air pipe leading from the purifier to the face-mask. A pipe f supplies oxygen under pressure from an oxygen container or flask, and joins a pipe h connected at i to the pipe u. (Two claims.) NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 838. Manufacture of porous slag. C. H. Schol. 839. Processes for the granulation of slag. C. H. Schol. 856. Furnaces. C. Zulver. 870. Automatic car-couplers. J. Willison. 874. Manufacture of manganese steel and articles made thereof. Sir R. A. Hadfield. 884. Manufacture of producer-gas. Dellwik - Fleischer Wasser gas G.m.b.H. and P. Koster. 897. Systems of and apparatus for washing and refilling locomotive boilers. J. Groom and W. H. Lowers. 902. Fluxing-composition for use in brazing cast iron, rod iron, or cast steel with cast iron. J. Abt. 905. Safety appliance to prevent disaster from over- winding at pitheads or lifts. T. Brownlow. 910. Means for testing the hardness of metals or alloys. Rudge-Whitworth Limited and H. L. Heathcote. 914. Hand-operated tools for reseating valves. Steel, Peech, and Tozer Limited and W. Griffin. 939. Pneumatic drills. Saxby and Farmer Limited and F. C. Brittain. 971. Means for locking hand-ropes for lifts and the like by electric control. M. T. Medway. 981. Packing of the piston rods of coal-cutting machines. P. W. Culshaw. 997. Conveyors. J. Rookes. 998. Apparatus for the recovery of ammonia. H. G. Hills. 1002. Picks and pick-boxes. T. M. Percy. (R. M. Percy, Siberia.) 1024. Automatic coupling for railway wagons and the like vehicles. C. W. Crossley. (G. W. Ettenger, Belgium.) 1025. Apparatus for coupling and uncoupling railway wagon buffers. C. W. Crossley. (G. W. Ettenger, Belgium.) 1037. Centrifugal pump. A. G. M. Michell. 1040. Rolling girders, beams, and so forth. G. Asbeck. 1041. Straightening machines for bars, girders, and the like. G. Asbeck. 1057. Machine tools. British Thomson-Houston[Company Limited and R. Dumas. 1070. Fuses for blasting in mines and the like. R. Donaldson. 1075. Drill chucks or sockets. S. W. Bell. 1091. Four-cornered hand brake for use on railway goods wagons, which can be applied at any corner and released at the same or any other corner as required. E. Davis and W. H. Whittington.