CHAPTER XXXVT 

 SHEET METALS 



509. Nature of Work. Formerly the workman who made 

 household utensils out of tin was called a tinsmith. Nowa- 

 days the use of tin for this purpose has greatly decreased, 

 and aluminum and enamel ware has taken its place to a large 

 extent. Today 

 the man who works 

 on sheet tin, gal- 

 vanized tin, sheet 

 brass, and copper 

 is called a sheet- 

 metal worker. 



Sheet-metal work 



consists in the utili- 



. . , FIG. 205. Bending Roll, 



zation of sheets of 



metal for industrial purposes and comprises the laying out 

 of tin or other sheet-metal utensils, the forming and making 

 of waterspouts, the bending of lock joints by the use of the 

 folder or brake (a machine for bending metal Fig. 205), the 

 laying of tin on roofs, and the closing of joints by the use 

 of mallet seamers, or roofing tongs. The tinsmith or sheet- 

 metal worker erects metal ceilings and side-walls, makes 

 crestings, awnings, hollow circular moldings, metal sash- 

 frames and skylights, and covers fire-doors and windows. 



Sometimes a distinction is made between coppersmiths 

 and sheet-metal workers. The coppersmith makes copper 



441 



