. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . fourth leaf in place, and the brake is ready to form cir-cular work. Every time the former is changed to a different size,change the fourth leaf to match the former, setting it the same way. To use the brake for common work, turn the fourth leaf back asshown at E in Cut No. 4, then work it the same as any ordinary brake. erly will stop the progress of the bending leaf, to formany desired angle. The
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . fourth leaf in place, and the brake is ready to form cir-cular work. Every time the former is changed to a different size,change the fourth leaf to match the former, setting it the same way. To use the brake for common work, turn the fourth leaf back asshown at E in Cut No. 4, then work it the same as any ordinary brake. erly will stop the progress of the bending leaf, to formany desired angle. The universal rule of mechanics that additional lever-age gives greater strength is taken advantage of throughproviding a forcing bar on the bending leaf, reinforcingthe leaf for the bending of heavy sheets, and this attach- 62 SHEET METAL WORKERS MANUAL ment is easily removed when not required. In cornicework where circular and semicircular forming make forthe greatest bending, this cornice brake will take care ofsuch work efficiently. For the forming of circular and semicircular bendswith cornice brakes, wooden forms are always provided,these being fitted as required, on the bending leaf. In. l A ) A
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
