. 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 . very light material accurate cut-ting is possible without the hold down, particularly onsquaring shears of short length. Foot Power Gap Squaring Shears.—I have describedthe squaring shears (Figure 1) as having housings farenough apart that sheets in width equal to the cuttinglength can be passed through from front to back withoutobstruction,—a cutting feature which is also practicalwith the foot po
. 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 . very light material accurate cut-ting is possible without the hold down, particularly onsquaring shears of short length. Foot Power Gap Squaring Shears.—I have describedthe squaring shears (Figure 1) as having housings farenough apart that sheets in width equal to the cuttinglength can be passed through from front to back withoutobstruction,—a cutting feature which is also practicalwith the foot power gap squaring shears (Figure 3). Theconstruction of gap shears gains for them an additionalcutting advantage for cutting sheet of any length and SHEET METAL WORKING MACHINERY 27 of a width limited by the throat or gap in the housingsor frame. A very convenient slitting gauge is attachedto the right-hand housing for use in slitting sheets longerthan the cutting blades. After the first cut the edge ob-tained at the previous stroke serves as a guide for thesucceeding cuts and in this manner alignment of the suc-cessive cuts is obtained. Foot power gap squaring shears are manufactured in. Figure 3.—Foot Power Gap Squaring Shears. cutting lengths 36, 42, and up to 52 inches for special re-quirements, with a maximum capacity for cutting No. 16gauge iron (U. S. Standard), and are made with a throator gap of 18 inches. Power Squaring Shears.—Figure 4 shows a powersquaring shears of modern design with the driving mecha-nism overhead, out of the way of the operator and freefrom the dirt and scale that usually fall from the sheetmetal that is being cut. The housings have a gap of 1inch to the edge of the cutting blade to permit of trim-ming sheets of any length before squaring. The gap 28 SHEET METAL WORKERS MANUAL referred to also allows for sheets to be moved into cut-ting position sidewise without obstruction. The powersquaring shears, overhead drive, are manufactured inleng
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
