Sand-Blast Apparatus

Author:  Ambrose G. Warren
Source:  US Patent 649,782
Doc ID:  1900000
Year of Publication:  1900
Abstract:  
This invention relates to an improvement in sand blast apparatus, and particularly to that class in which a shand blast is employed for cleaning castings and in which a grate is arranged in the floor upon which the castings are placed and so that the sand from the blast and the material removed from the castings drop through the grating into a hopper, from which the dust is carried to a washer, the coarser material discharged fro the hopper and the sand carried to a separator. As usually constructed devices of this character require a deep space or pit below the floor to furnish sufficient room for the necessary mechanism, and these pits are liable to become filled with water in case the land is low, as frequently happens in foundries.