. Journal. led by dampers, x. to three parallelflues, t. and thence to the chimney, t. The flues,/, contain coils, z, for heating the air supply to thegr»t«, i. and to the liridgc. /. and also a coil forgenerating steam to be supplied to the grate. —W. F. F. Furnaces; Utilising waste heal from open-hearth . R. M Snvder. WUkinsburg, Pa. Pat. Aug. 22. 1916. Date of appl.,Dec. 27, hot waste gases from two open-hearth furnacesare drawn by two similar fans through separateregenerators to two boilers. The supply of gasesto the boUers is equalised by providing a crossconne
. Journal. led by dampers, x. to three parallelflues, t. and thence to the chimney, t. The flues,/, contain coils, z, for heating the air supply to thegr»t«, i. and to the liridgc. /. and also a coil forgenerating steam to be supplied to the grate. —W. F. F. Furnaces; Utilising waste heal from open-hearth . R. M Snvder. WUkinsburg, Pa. Pat. Aug. 22. 1916. Date of appl.,Dec. 27, hot waste gases from two open-hearth furnacesare drawn by two similar fans through separateregenerators to two boilers. The supply of gasesto the boUers is equalised by providing a crossconnection between the two conduits.—W. F. F. Smelter or ore furnace ; Apparatus for utiltsing the heated fames from a O. P. Luedke, Chatham. 111. Pat. 1,196,123, Aug. 29,1916. Date of Mar. 16, 1914. A c.\siNG is provided with a grate, 3, below which aflue. 1, with vertical partitions opens, and abovewhich an exit flue, 13, is arranged. The upperpart of the casing has inclined roof members, and. contains an arrangement of horizontal and verticalplates forming flues which can be controlled bydampers, 2, 6, 7. A vessel, 8, contains waterwhich h heated by the fumes passing through theflues.—W. F. F. Metal ingots; Manufacture of- Steel Peechand Tozer, Ltd., and E. H. Sanit«r, Pat. 101,229, Jan 12, 1916. (Appl. of 1916.) Stkel and other metal ingot«i are manufacturedwith little or no pipe by wholly or partly covering the ingot when liquid with a plate ofnon-conducting material such as firebrick, orasbestos and lardbnard. removing the coveringjust before soliditication of the centre, and pouringadditioiwl liquid metal into the centre. To avoidany pipe from the added nutal extending intothe ingot, a head of brick or other non-conductingmaterial is placed on the toj) of the ingot beforefilling the pipe.—W. F. F. Tin ores ; Process for removing iron from von Rauschenplat, Steglitz, Germanv, Assignorto Barilla. Ltd., T,ondon. Pat. 1,196,049,A
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