148 



TBANSACTIONS OF THE 



water space is therefore subjected to the pressure in the boiler, 

 the steam space only to that in exhaust pipe. 

 It is compact, efficient, light, cheap and durable. 



[Jl bronze medal awarded. 



Process for Melting Iron Dust, Chips, Shavings, S)'C. 



Abiel Pevey, Lowell, Mass. 



It is well known by mechanics, that turnings, 

 cast-iron shavings, etc., are from the best stock, 

 hence founders have attempted to re-convert 

 them to available metal; but hitherto with 

 only partial success. A deterioration in qual- 

 ity, and a great relative loss in quantfllj^, have 

 been sustained by every process heretofore 

 employed. By this improved process, the 

 [|^rflSlPilP?p| ^^'^§^"^^ quality of the metal is unimpaired, 

 the strength of castings augmented, loss is not 

 greater than in the fusion of old machinery 

 castings — about 10 per cent. 



This new process consists in the use of cast 

 iron pots, or vessels, in which the shavings 

 and turnings are closely packed, and secured 

 by a lid easily and safely adjusted. These 

 vessels may be cylindrical, or otherwise 

 formed, with one or more tubes extending 

 through them, or without. But I have found 

 the best results attending the use of vessels 

 with one tube each. 



These vessels being filled, are put into the 



cupola with other stock, pig, or old iron, 



or both, and with the general contents 



J gradually descend. By the time each 



Ivessel will have melted, Its contents will 



be so much aifected by the heat, as to 



cement or cohere, and will not be in 



danger of dispersion from the force of the blast. 



Fig. 1 is a perspective view of the vessel filled with cast iron 

 chips. Fig. 2, a vertical section of the same. Fig. 3 is a vertical 

 section of a retaining vessel, without a central perforation. Fig. 4 



