1188 THE COLLIERY GUARDIAN. June 4, 1915. which the magneto or magnetos can be operated. The pull wires are divided into sections, the ends of each section of wire being guided over grooved pulleys e, f, /x, e2, f2, which are preferably arranged near the. magnetos and “ter- minating into balance weights /, or being secured to said pulleys. Referring to fig. 2, the two grooved pulleys e and / are arranged at the two sides of a member g—fixed to a shaft gx suitably geared to the magneto shaft g2—in such a manner that the pulleys are independent from each other and from the member g arranged between them, and that the latter is operated by either of the grooved pulleys e and f in' one and the same direction. In order to ensure such operation, the adjacent faces of the pulleys and member g are provided with pawl and ratchet mechanisms h,i, and respectively, one of which is positively operative when the other runs free, and vice versa. Referring to the arrangement illustrated in fig. 3, a grooved pulley e, which may be replaced by a compound grooved pulley, receives the tw;o ropes of two adjacent sections of the track, the ropes being wound thereon in the same sense, so that the rotation of the pulley should always be in one and the same direc- tion. The pulley e is loosely mounted on a pin k attached to a bracket Z, and carries with it another grooved pulley m, by- means of which a pulley loosely carried by the bracket I through the intermediary of a pin k± is operated. The pulley m1 in its turn operates the magneto a carried by the bracket / through the intermediary of a gear o, p, q, r and free wheel mounted within the pinion o. Instead of operating the magneto in the manner hereinbefore referred to,: use may be made of a .mechanism which during the operation of the pull wires is put under tension and is then released, operating in its turn the magneto. For instance, the intermediate member g, described with reference to fig. 2, may be tripped and released at a predetermined moment during the movement of the pulleys, thereby allowing the gear of the magneto to be operated for a predetermined interval of time by a spring previously put under tension. (Five claims.) 10228 (1914). Improvements in Safety Devices for Supporting Pit Cages and like Elevators. J. P. Kenney and G. Sheriff, both of Post Office-buildings, Stocksbridge, near Sheffield, Yorkshire.—Consists more particularly in the mechanical device by which the guide rope is instantly clasped and gripped when the cage is released by accident, and which is hereafter more particularly described. Fig. 1 is an elevation of a pit cage of simple construction, with the safety appliance affixed thereto; fig. 3, side elevation of the supporting clamp with the wire guide rope passing through it;the jaws partly opened; fig. 4, plan or top view of same showing the joint; fig. 5, view of the back of clamp showing joint pin. If an accidental releasing of the cage from the winding rope C occurs, the chains B collapse, the weight M falls, and draws down the levers G-, which turn upon their fulcrum, close the jaws of the clamps F and grip the fixed guide ropes D, which thus support the cage. (Two claims.) 16997 (1914). Improvements in Visual Signalling Appa- ratus particularly for Use in Mines. J. Richardson, of 105, Phoenix-street, Sutton-in-Ashfield, Nottingham. — Relates to improvements in visual signalling apparatus which is particularly suitable for the transmission of signals in and connected with mines, and for use in connection with the usual sound signalling apparatus; the object of the present invention being the production of an apparatus in’ which the signal rendered visible corresponds with the number of times the signalling or M rapper ” rope is actuated and is automatically darkened whenever a new signal is given, or, in which when a selected signal of a given number is illuminated it remains visible during the time that signals of a less number are rendered visible, and in which the last signal given remains visible until it is automatically rendered invisible by means actuated by the winding mechanism. According to the invention, there is a lower slide which is provided with ratchet teeth, and in connection with which there is an actuating lever, which is connected to and actuated by the rapper rope. There is also a retaining pawl, which is arranged to engage with the ratchet teeth and hold the lower slide during part of the downward stroke of the actuating lever, and which is held clear of the teeth when the lever is in its lowest position, the parts being so arranged that the slide is free to fall when the actuating lever is in its lowest position. The lower end of the lower slide is connected to the piston of a cataract by which the upward and downward movements of the slide are steadied. The lower slide is also provided with a trip bolt, a pivoted lever, and a rod by which the bolt is operated through the pivoted lever. This rod is provided with a head, and is fitted to slide in the lower slide, and there is a spring between the upper end of the slide and the head of the rod, the spring used being suffi- ciently strong to raise the tripper rod clear of the pivoted lever. Suitably arranged above the lower slide there is an upper slide which is provided with ratchet teeth, and with a retaining pawl mounted upon an axle in fixed bearings. This axle also carries a bolt trip lever and an < F.iq. 5 automatic trip lever, and in connection with the former there is a rod, which is so arranged that it can be actuated by the trip bolt of the lower slide. The automatic trip lever is actuated by the winding mechanism during such winding operation, whereby the upper slide is liberated from its retaining pawl and all signals rendered invisible at the end of each winding operation. Connected to the upper slide, but electrically insulated therefrom, there are brushes or their equivalent for separately coupling electric lamps to an electric circuit, the parts being so arranged that as the lower slide is raised step by step the corre- spondingly numbered lamps are lit in succession, and so that the lamps lit by one movement of the slide is extin- guished before the next lamp is lit. At the completion of the giving of each signal the lower slide falls to its lowest position, while the upper slide is held in its signalling posi- tion until released by the winding mechanism. When the lower slide thus falls the trip bolt comes into position, to actuate the upper retaining pawl and release the upper slide if the lower slide is again actuated before the signal last given has been complied with, but when the upper slide falls it puts the trip bolt out of action, and it is therefore impossible to extinguish the signal No. 1 by a movement of the lower slide. Carried by the brush block there is a horizontally movable slide, upon which is mounted a verti- cally slidable part of a knife switch, the other parts of which are connected to, say, the lamp of the No. 3 signal. When, therefore, the rapper cord is pulled three times the circuit to the No. 3 lamp is made by the brush and by the knife switch. The upper slide can then fall to light lamp No. 1 or No. 2, while the lamp No. 3. remains lit, and the lights, lit cannot be extinguished until the upper slide is released by the winding mechanism. If the brush block is raised above the No. 3 lamp the horizontally sliding plate comes into contact with a fixed incline, and the vertically movable part of the knife switch is moved to miss the fixed part of such switch when the brush block descends. There is also another fixed incline by which the movable part of the knife switch is returned to its contact- making position on or before the brush block falls to its lowest position. Fig. 1 is the front elevation, partly in section, of the lower part of the improved signalling appa- ratus; fig. 2 is the front elevation, partly in section, of the centra!part of the improved signalling apparatus; fig. 3 is the front elevation, partly in section, of the upper part, of the improved signalling apparatus; fig. 4 is a part side sectional elevation of fig. 3; and fig. 5 is a part sectional plan of fig. 3. (Three claims.) Hull Coal Exports.—The official return of the exports of coal from Hull to foreign countries for the week ending Tuesday, May 25, is as follows:—Amsterdam, 455 tons; Archangel, 652; Buenos Ayres, 4,155; Bombay, 711; Dieppe, 2,176; G-efle, 1,142; Gothenburg, 3,199; Haugesund, 433; Harlingen, 693 ; Lagos, 3,117 ; Malmo, 1,192 ; Odense, 1,785 ; Rouen, 34,809; Stockholm, 2,826—total, 57,345 tons. The above figures do not include bunker coal, shipments for the British Admiralty, nor the Allies’ Governments. Corres- ponding period, May 1914—total, 89,124 tons. NEW PATENTS CONNECTED WITH THE COAL AND IRON TRADES. Applications for Patents. 7364. Method of and apparatus for removing and loading a mass of coke located on a quenching bench. Carl Still (firm of). 7370. Railway vehicle buffers. H. Rose. 7371. Means for connecting automatic and non-automatic couplings oh railway vehicles. H. Rose. 7390. Cranes. D. T. Young. 7398. Anti-incrustation briquettes or blocks. R. Barton. 7412. Breathing device for diving equipments and the like. Hanseatische Apparatebau Ges. vorm. L. von Bremen and Company m.b. FI. 7413. Ventilators for tramcars, motor-omnibuses, railway trains, and other vehicles, also churches, halls, workshops, mines, and other workings. W. Ash. 7415. Apparatus for cooling clinker in the manufacture of cement and for like cooling purposes. G. M. Park. 7416. Pneumatic conveying and dust removal plants of the fan exhauster type. W. J. Frame and G. A. Mower. 7422. Automatic regulation of centrifugal and turbine pumps. Willans and Robinson Limited, and R. Bell. 7423. Safety clutches and springs for lifts, colliery cages, and similar appliances. B. Hardwick. 7443. Pumps or compressors. A. E. L. Scanes. 7466. Process and apparatus for casting metal and the like in moulds. Prazisionsgusswerke System Schmidt-Reichhardt G. m.b. H. 7484. Excavator. M. Woods. 7504. Air and the like cleaning devices. A. W. Bennis. 7505 and 7506. Cleaning or conveying plant. A. W. Bennis. 7528. Manufacture of material suitable for use. in the puri- fication of coal and other cases. P. E. Williams. 7535. Process and apparatus for the treatment of hydro- carbons. G. P. Lewis. 7546. Electric accumulators or storage batteries for use in electric battery lamps. S. D. Smith. 7547. Apparatus for supporting stretchers on vehicles used in mines. G. W. Payne. 7564. Apparatus for use in the annealing of metal or in the •manufacture of malleable iron. W. Slingsby. 7587, 7588, and 7589. Automatic car couplers. J. Willison. 7600. Water tube boilers. J. M. Holman and J. L. Holman. 7602. Number plates for railway wagons and the like, and means for the production thereof. G. Sheppard. 7607. Armouring for simple core electric cables for alter- nating currents. A. Rosselli. 7614. Brick making machines. D. Whitehouse. 7628. Steam boiler or like furnaces. C. Bond. 7630. Weighing machines. Henry Pooley and Son Limited and James Dobson. 7637. Construction of smoke or fume helmet or the like. A. F. Porter. 7638. Control of electric motors. C. F. Brindley. 7648. Gas producers or furnaces having clinkering grates. S. Cutler, junr. 7669. Apparatus for dissipating noxious gases. Sir H. S. Maxim. 7675. Manufacture of electric cables. W. F. Smith. 7680. Points or switches for tramways, railways, and the like. Edgar Allen and Company Limited, and C. Pigott. 7691. Puddling iron. J. E. Fletcher and J. Harrison. 7694. Utilising steam pressure in automatically regulating the draught through a boiler furnace. ; D. Gripaios. 7709. Rock hammer drills. F. E. Kewley and J. A. ’ Corner. 7726. Miners’ safety lamps. E. A. Hailwood. 7731. Foundry ladles. S. W. Williamson. 7735. Reciprocating driving gear particularly adapted for use in conjunction with conveyors of the recipro- cating or jigging type and the like. Mavor and Coulson Limited, and S. M. Mavor. 7769. Furnace settings for the destructive distillation of coal or other carbonaceous substances. S. N. Wellington. 7774. Feed water heating apparatus for locomotive and other boilers. G. H. Willans and E. S. Luard. 7778. Distillation of heavy oils. W. A. Hall. 7803. Manufacture of bolts. J. A. Frauenheim. 7839. Device for changing regenerating cartridges of breathing apparatus. Hanseatische Apparatebau- Ges. vorm. L. Bremen and Company m.b. H. 7842. Shaker conveyors. G. J. F. Black. 7874. Explosive compositions. B. J. Flurscheim. 7875. Cradles or stages for use in the sinking or construc- tion of shafts. H. Bade, junr. 7891. Benzol gas producing plant. A. Perrier. 7897. Presses for flanging plates. R. and W. Hawthorn, Leslie and Company Limited, and J. Slater. 7902. Gas compressor. H. Harsant and A. Jeffrey. 7911. Band conveyors. W. L. Spence. 7920. Combustion of gaseous or vaporous fuels. C. D. McCourt and Commercial Laboratories Limited. 7931. Turbines. J. H. Corthesy and W. K.-L. Dickson. 7935. Breathing device for diving equipments and the like. Hanseatische Apparatebau-Ges. Vorm. L. von Bremen and Company m.b. H. 7940. Chemical containing respirators or breathing appliances. J. L. Clark. 7966. Furnaces. H. J. Yates, S. N. Brayshaw, and E. R. Brayshaw. 7972. Furnaces of steam boilers and the like. C. A. Smith. 7981. Appliance for.setting steel or iron plates cold, either flanged or plain, to cone or similar shapes. J. G. Royal. 7987. Rotary converters. British Thomson-Houston Com- pany Limited. (General Electric Company, United States.) 8003. Rotary blowers and gas, compressors. M. Guttner. (Continued on page 1190.)