Scaling Tool

Author:  Thomas M. Kelley, Walter I. Anderson
Source:  US Patent 3,343,246
Doc ID:  1965027
Year of Publication:  1965
Abstract:  
A scaling tool driven by a rotating electric motor having a cam drive arrangement which converts rotary to reciprocating motion driving a needle scaling head together with a bundle of needles therein which are therefore impelled into contact with a surface to be scaled and cleaned.