. 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 . Figure 31.—Chicago Steel Cornice Brake (End View). screw 0 and set screw M, and tightening set screw PTFigure 31. It is important that cap screw 0 be tightenedafter the upper jaw is set to the desired point. Thereshould be enough space for the material between the upperjaw and the bending leaf when the latter is raised to ahorizontal position. Adjustment for clamping the ma-terial is made by loosen
. 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 . Figure 31.—Chicago Steel Cornice Brake (End View). screw 0 and set screw M, and tightening set screw PTFigure 31. It is important that cap screw 0 be tightenedafter the upper jaw is set to the desired point. Thereshould be enough space for the material between the upperjaw and the bending leaf when the latter is raised to ahorizontal position. Adjustment for clamping the ma-terial is made by loosening bolt F, Figure 31, and turningthe eccentric nut E shown in the same figure to the de-sired point, and then tightening bolt F. TO SHEET METAL WORKERS MANUAL Should the material creep forward when clamping, seethat the pin marked L in Figure 31 is down tight beforethe bending edge of the upper jaw clamps the sheet. Ifthis pin is not down at the proper time, place a blockunder the rear of the legs at the point marked R, Figure31. This will bring the pin to the proper position. Shouldthe sheet throw over farther on one end than the other,. Figure 32.—Showing Method of Fastening Forms. set the edge of the upper jaw back on which the sheet isthrown over the farthest. Short heavy pieces should be bent in the center ofthe brake. This equalizes the strain. A steel angle bar, marked 1 in Figure 33, is provided,with the Chicago steel cornice brake, and is intended tobolt on the edge of the bending leaf, for bending heavysheets. This gives additional leverage. The %-inch barmarked 2, Figure 33, is made of special carbon steel andis so attached to the bending leaf that it can be removedto allow clearance for making a narrow reverse bar should not be removed for any other purpose. The balance weights attached to the bending leaf, shownat each end of the machine in Figure 29, can be raisedor lowered to suit the convenience of the user. Figure 31 at G and Q shows an adjustabl
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