Scaling Tool

Author:  Reo D. Gray, James R. Denison
Source:  US Patent 2,356,314
Doc ID:  1942004
Year of Publication:  1942
Abstract:  
Our invention relates to a tool for scaling welded joints, painted surfaces and for similar uses where it is desirable to chip free, and knock loose chips or flakes of material. It is essential that said flakes of material be disengaged from a surface by a relatively sharp blow, but said blow shall not be severe enough to damage the surface from which they are removed. In welding, for example, flakes of material are formed over a welded joint, which are not fluxed to the joint but secured thereto rather tightly. Said scale is an undesirable, foreign body which must be removed before the welded joint can be painted or otherwise protected against rust or corrosion. It is common practice to perform such scaling operation with a lightweight pointed hammer. The workman strikes a relatively light tapping blow on the scale to break it loose without affecting the underlying surface. This is a tedious and time-consuming job and frequently the scale is formed upon an inaccessible place which is difficult to work upon. We have discovered that, if relatively lightweight tools are provided, which are slidably mounted in a holder and are driven forwardly by a sharp blow so as to slide in said holder, that the sharpness of the blow may be used to perform the scaling operation without injuring the underlying surface.