OCR Text |
Show To Locate and Drill Switch Point Holes The following method of locating and drilling holes In a panel for switch contact points true In radius and of equal distances apart Is a real labor saver for the experimenter who 1 "builds his own." ! Take a piece of sheet brass about J 1-S2 Inch in thickness, and of a length j according to the radius to be used, and j Inch wide. I Scratch a line through the center, A, prick mark point B, set one point of divides at B and scribe arc C, of the radius to be used. Prick mark the point, D and D-l. which are centers of contact points. |