914 THE COLLIERY GUARDIAN. May 11, 1917. Kingdom is steady, at 235s. Bombay to United Kingdom is unaltered at 300s., with 325s. mentioned for West Italy discharge. Calcutta to Genoa with jute is still at 280s. Madras Coast to Marseilles with kernels is steady, at 500s. Mediterranean ore and phosphates shippers have a big demand for boats, and are offering very full prices for cargo space. Tyne to Calais, option Boulogne or Dunkirk, 1,500, 45s., coke; Dunkirk, 300, 45s., coke; North French Range, 440, 45s., coke; Treport, 200, 220, 250, and 450, 50s., coke; and Stavanger, 1,800, 200 kr., reported. Cardiff to Bordeaux, 3-,500 and 3,700, 69s., neutral; 1,200, 34s.; Bilbao, 3,500, 80s.; Barcelona, 4,000, 160s.; Caen, 900 and 980, 24s.; 1,100, 23s.; Cherbourg, 1,506, 1,300, and 1,600, 47s. 3d., neutral; 1,200, 23s. 6d.; Gibraltar, 5,000 and 2,000, 87s. 6d., 500; Havre, 1,200, 1,500, and 1,900, 45s. 9d., neutral; 600) 47s. 3d., neutral; 600, 43s. 3d., neutral; Rouen, 2,200 and 1,000, 24s. 6d.; 2,200 and 1,600, 48s. 9d'., neutral; St. Malo, 700 and 600, 45s., neutral; and 700, 21s. Swansea to Havre, 600, 47s. 3d.,* neutral; 800, 45s. 9d., neutral; Guernsey, 300, 32s. 6d.; Caen, 800, 48s., neutral; and Belfast, 400, 15s. Hull to Fecamp, 300, 60s., pitch; Rouen, 1,000, 27s. 6d.; and 2,700, 53s. 3d., neutral. Tees to Fecamp, 450, 60s., pitch. Gosle to Dieppe, 900, 27s. 6d. Cardiff, option Swansea or Newport, to Alexandria, 1,500, 140s. CONTRACTS OPEN FOR COAL AND COKE. For Contracts Advertised in this issue received too late for inclusion in this column, see, Leader and Last White pages. Edmonton, June 5.—Tenders are invited for the supply and delivery of coal and coke at the various elementary schools in Edmonton for the year ending June 30, 1918. Forms of tender may be obtained from the architect) Town Hall, Lower Edmonton, N. 9. Tenders must be delivered to Mr. Arthur Heap, secretary, by June 5, the envelopes to be endorsed “ Tender for coal and coke.” London, June 11.—The Borough Council of St. Pancras are prepared to receive tenders for the supply of steam coal fpr use at the Regent’s Park and King’s-road Electri- city Stations, and at the Prince of Wales-road, King-street, and Whitfield-street Baths and Wash-houses, for 12 months (delivery to be made as required). Copies of the specifi- cation, conditions of contract, and form of tender to be obtained upon application at the Electricity Department Offices, No. 57, Pratt-street, Camden Town, N.W., on pay- ment of a deposit of <£1, which, will only be returned on receipt of specification accompanied by a bona fide tender. Tenders in accordance with specification to be sent to the town clerk, endorsed “ Tender for coal,” by June 11. The Council do not bind themselves to accept the lowest or any tender. Stretford, May 22.—The Stretford Gas Company are prepared to receive tenders for the supply of screened coal, through-and-through coal, coal nuts,, rough slack, and cannel, for gas making purposes, for a period of. 12 months, commencing from July 1, 1917. Any further information may be obtained fron/H. Kendrick, engineer and manager. Tenders, stating price per ton delivered on the Bridgewater Canal alongside the Gas Works, to be sent sealed, and endorsed “Tender for gas coal,” addressed to “The Chairman of the Board,” not later than May 22. The directors do not bind themselves to accept the lowest or any tender. Abstracts of Contracts Open. Aylsham (Norfolk), May 14.—200 tons of steam coal for the Guardians. Tenders to the clerk. Ballyvaughan (Ireland), May 17. — 100 tons best' screened Wigan or other suitable house coal for the Guar- dians. Tenders to the clerk. Barming Heath and Chatham (Kent), June 18.-3,900 tons steam coal, 1,200 tons household coal, 800 tons gas coal, and 105 tons bakers’ coal, for Asylums. Forms from the Clerk, Barming Heath Asylum, Kent. Bridgnorth, May 17.—Fine, rough, and screened slack for Waterworks (about 12 to 15 tons weekly). Tenders to the town clerk. Crewe, May 14.—Coal, coke, and slack (12 months) for the Town Council. Forms from the borough surveyor. Glasgow, May 14.—Nuts and dross (six or 12 months) for Wharf. Forms from the town clerk, -City Chambers. Hemel Hempstead, May 26.—400 tons double-screened nuts and 400 tons J in. slack for the Council. Forms from the borough surveyor, Town Hall. - Larne (Ireland), May 16.—150 to 300 tons Broughton Moor, St. Helens, North Wales house, Whitehaven house, Wigan house, or Oughterside coal, best quality, for the Guardians. Tenders to the clerk, Union Offices. Letterkenny, May 14.—1,200 tons (or less) of best steam coal, and 260 tons best English house coal (both double- screened), for Donegal District Asylum, Letterkenny. Forms from H. E. Russell, Asylum. Roscrea (Ireland), May 17.—150 tons best Whitehaven or other suitable coal. Tenders to the Workhouse. Salisbury, May 18.—Steam coal (12 months) for Water- works and Sewage Works, and household coal. Forms from the city surveyor, Endless-street. Shipley, May 21.—15,000 tons best screened gas coal or washed nuts for the Gas Committee. Forms from the engi- neer, Gas Works. Shipston-on-Stour, May 19.—140 tons house coal and 200 tons steam coal for Guardians. Forms from the clerk, Shipston-on-Stour. Silsden. — 2,500 tons gas coal for the Urban District Council. Forms from the gas engineer. Strathaven, May 18.—1,400 tons gas coal for the Gas Company. Tenders to the secretary. Teddington, May 14.—Household coal and coke for the Urban District Council. Particulars from the surveyor, Council Offices. Wombwell, May 31. — 5,000 tons (more or less) best screened gas coal or 2 in. washed gas nuts for the Urban District Council. Forms from the manager, Gas Works. Workington, May 14.—10,500 tons screened round hand- picked gas coal for the Gas Committee. Particulars from the engineer, Gas Works. York, May 14.—Best steam screened coal (six or 12 months) for the York City Asylum. Forms from the Asylum. The date given is the latest upon which tenders can be received. ABSTRACTS OF PATENT SPECIFICATIONS RECENTLY ACCEPTED. 104967. An Improved Visible Signalling Device Applic- able to the Mechanical Signalling Apparatus Used in Mines and other places. W. Bell, of Bellevue House, Wester- hope; and R. Briggs, of Whorl ton-terrace, North Wal- bottle, Northumberland. — Relates to visible signalling devices, and has for its object to provide an improved device, applicable to the mechanical signalling apparatus used in mines and other places, whereby the audible signals given by the rapper of such apparatus will be visibly indicated. Fig. 1 is a front elevation, the front plate being removed for clearness; fig. 2 is a plan; and fig. 3 is a rear elevation. Adjacent to the rapper a of the mechanical apparatus which gives the audible signals is a dial b in the form of a sector, having marked around its curved edge the various signals to be visibly indicated to the engineman, and in conjunction with said, dial there is provided a pointer c, on the spindle d of which is. fixed a toothed wheel e, with which engages an operating pawl / connected by a rod or the like g to a tail-piece h on the pivot pin j of the rapper a, and so arranged that, when the rapper rises, the operating pawl / slides over the toothed wheel e, while, when the rapper falls, the operating pawl / moves the toothed wheel e one tooth forward. A second or retaining pawl k is provided beneath the toothed wheel e. The pawl k is pivoted on a pin m carried by the dial b, and the front plate n of the device, and has attached to it a spring o, which tends to raise it into engagement with the toothed wheel e. The free end p of the retaining pawl k is provided with a pin q, which slides in a slot r in a member s carried by the plunger t of an air dash-pot u, which member s is adapted to be raised to raise the plunger t and the retaining pawl k to bring the latter into engage- ment with the toothed wheel e by a pivoted lever v con- nected by a rod or the like w to the tail-piece h on the Z7£ J. pivot pin j of the rapper a, the arrangement being such that, when the rapper rises, the plunger t of the dash-pot u is raised to bring the retaining pawl k into engagement with the toothed wheel e, and prevent reverse rotation thereof while the operating pawl / slips over the wheel. When the rapper a falls, the plunger t of the dash-pot u is free to fall, but the dash-pot acts as a time-lag device, and the retaining pawl k is thus kept in engagement with the toothed wheel e, and prevents reverse rotation thereof, so that, if the rapper is again operated after only a brief interval, the toothed wheel e and pointer c are moved another step forward. . A spring x is provided for return- ing the toothed wheel e and pointer c to zero position when the retaining pawl k disengages the wheel e. By increas- ing or decreasing the size of the outlet orifice of the dash- pot u, the period during which the retaining pawl k remains in engagement with the toothed wheel e can be varied. A cock y is provided for this purpose. For can- celling the signal indicated by the pointer c after the wind- ing engine has been started, an arm z is provided, which co-acts with a pin 2 on the operating pawl /. The arm z is fixed on a pin 3 carried by the dial b, and a second arm 4 is also- fixed on the pin 3 behind the dial b. The arm 4 is connected by a wire or the like 5 to the usual tappet arrangement operated by a traveller actuated by the wind- ing engine in the well-known manner. So soon as the winding engine has been started in response to a signal, and the cage has passed a predetermined point, the traveller operates the tappet arrangement which, through the wire 5, raises the arm 4, and causes the arm z to engage the pin 2 on the operating pawl /, and lift the latter out of engage- ment with the toothed wheel e, when the pointer c is returned to zero by the spring x. Mounted at the back of the dial & is a small slide 6 bearing the. word “ men,” which slide is adapted to be raised to expose the word “ men ” through an opening 7 in the dial b when the signal of three raps is given’. The slide 6 is connected by a link 8 to a pivoted arm 9, with which co-acts an arm 10 fixed on the pointer spindle d, and so arranged that it (the arm 10) engages the arm 9, and lifts same and the slide 6 (as indi- cated in dot-and-dash lines in fig. 3) only w'hen three raps are given in quick succession, and the pointer c indicates “3.” The “men” slide is retained in the exposed posi- tion by a hinged catch 11, which is caused to engage beneath the arm 9 by a spring on a pin 12, immediately the arm 9 is raised above the top of said catch. The “ men ” slide 6 remains exposed until the cage passes predetermined points in its passage, when the catch 11 is drawn out of engagement with the arm 9 against the action of the spring on the pin 12 by a wire, or the like attached to a second tappet arrangement actuated by the traveller oper- ated by the winding engine, and the arm 9 falls behind the catch 11, and the word “ men ” on the slide 6 falls out of sight of the engineman. 13 is a stop which prevents rear- ward rotation of the arm 10 and pointer c beyond zero. (Three claims.) 104991. Improvements in Fuel Economisers for Steam Boilers. C. Savage, of Dean-road, Croydon; and F. W. Green, of Wakefield, Yorkshire.—Has reference to the pre- heating of water as supplied to fuel economisers of steam boilers by transferring heated water from the fuel econo- misers to the cold water feed inlet. ,Tn the drawing, which is a sectional elevation, a pipe A is employed which couples up to the cold water feed range by means of end flanges B, B, and from this pipe A is a branch C, which couples up to one end of the hot water return pipe D, the other end of which couples to a branch on the top branch pipe of the economiser, at the hot or cold end, as may be most con- venient, the difference in temperature between the two ends being almost negligible for this purpose. This branch C may widen as it approaches the body of the pipe A, or, if desired, can be parallel. Inside the pipe A is an internal tube E expanded into the body of the pipe A, and pro- vided with a suitable number of suitably sized holes F, the tube E being of smaller diameter than the pipe. The cold water on its way to the economiser passes through the tube E, and the hot water passing along the return pipe D enters the branch C, surrounds the tube E, and passes through the holes F in this tube E, and mixes with the cold feed, thus raising its temperature before entering the economiser. The apparatus should preferably be fixed above the top branch pipe of the economiser, as this will enhance its efficiency, the hot water following its natural tendency to rise rather than fall. G is a blow-off cock. (Two claims.) 105047. Improved Construction of Coke Oven Heating Flues. R. Fabry, ,The White Building, Fitzalan-square, Sheffield.—The object is an improved construction of coke oven heating flues,. by means of which the working temper- ature of such heating flues is made more uniform through- out their length, irrespective of whether the said working temperature is kept high or low. Fig. 1 is a longitudinal section through the vertical axis of part of a coke oven side wall, and shows the respective paths of air, gas, and diluting products of combustion for one of the two direc- tions of draught used in connection with regenerative ovens; fig. 2 is a transverse section through the vertical axis of a heating flue in which the air and products of combustion ascend for the time being; and fig. 3 is a transverse section through the vertical axis of a heating flue, in which the gas, air, and products of combustion descend for the time being. The several adjacent vertical flues A are all connected to two horizontal flues B and C respectively arranged over and below the vertical flues A. Below each alternate flue A nozzles D communicate by means of passages'E with one regenerator, whilst below the other flues A nozzles F communicate by means of pass- ages G with the other regenerator. Over each alternate partition H, separating the vertical flues A from each other a gas inlet I is arranged, so as to direct the combustible gas always into such flue wherein the mixture of air and products of combustion descends for the time being. The nozzles D and F are preferably conical, and of such shape and dimensions as to cause the air when passing upwards through them to do so with sufficient speed as to create and maintain an intensive circulation of air, gas, and pro- ducts of combustion in the vertical flues above them. The said shape and dimensions also cause the products of com- bustion when passing downwards through the nozzles D Fig.2 Fig.3 B B -D E G E G E and F to convert their speed into pressure, and so allow the ovens to work with a minimum of draught. The com- bustion of the gas always starts in those vertical flues A wherein the flow of gas, air, and products of combustion descends for the time being, but the dilution of the incom- ing air and gas with products of combustion retards the rate of combustion, whilst increasing the rate of circula- tion in such a manner that combustion takes place practi- cally throughout the length of the heating flues, which results in the heat being liberated at every point of the heating flues instead of being localised as usual, at or near the place when the gas and air meet. (One claim.) 105203. Improvements in Furnace Arches and Bricks therefor. F. B. Dehn, of Broad Sanctuary Chambers, Westminster, London, S.W. (Communicated by American Arch Company, of 30, Church-street, New York.)—Relates to improvements in furnace arches and arch bricks there- for. Fig. 1 is a longitudinal section through a fire box ; and fig. 2 is a horizontal section through half of the fire box showing the arch in plan. The inside fire box is com- posed of the inside throat sheet 1, the flue sheet 2, the crown sheet 3, the side sheets 3&, and the door sheet 4. The outside fire box comprises a throat sheet la, side sheets, and an outside back sheet 4a. Only a part of the flues 6 which extend forwardly of the flue sheet 2 are shown. The circulation tubes 7 extend rearwardly and upwardly from the inner throat sheet 1, and connect the front and rear water legs, access being had thereto by means of the plugs 8. The arch. A comprises three central spans, each com- posed of a plurality of arch bricks, and two wing spans are also composed of a plurality of wing bricks.