Fig. 31.
Place a small bar of iron in the vise jaws—this bar or pipe should be about ¾ inch in diameter and is used as an anvil over which to round up the candle socket.
Lay the piece of tin that is to be used for the candle socket over the anvil with the fold A uppermost—bend the tin around the anvil with the hand or with light mallet blows, taking care not to close up the flaps B and C as you round the piece over the anvil. You will not be able to get the socket into a perfect cylindrical shape at first and until B and C are fitted together as shown in No. 3. Simply round the piece up as best you can until flap B fits into flap C. Then use a pair of flat-nosed pliers to pinch B and C together as shown in No. 4.
When the two seams are fitted together or locked the socket should be again placed on the bar and the hammering continued until the socket is cylindrical and the seam hammered together.
Examine a tin can—most of them have locked seams at the side.
If carefully made, this socket should fit a common candle which is ⅞ of an inch in diameter.
Fig. 32.
Cutting a Hole in the Drip Cup.—When the candle socket is completed, a hole should be cut for it through the bottom of the drip cup. The socket is slipped through this hole until the bottom of the flange A rests against the bottom of the drip cup, see [Fig. 32]. A small chisel should be used to cut the hole through the bottom of the drip cup. The drip cup is rested on a small block of wood which is held in the vise jaws, and the chisel used in the same manner as a punch, the end of the wooden block supporting the tin as the chisel cuts through it. The cutting edge of the chisel should be about ⅛-inch wide and should be very sharp. Such a chisel may be purchased at most tool dealers or a ⅛-inch nail-set may be purchased and the end ground to a chisel point on a grindstone. A common steel nail may be used for a chisel if the point is filed off entirely and the end of the nail filed to a chisel point. The shank of the nail should be ⅛ inch in diameter.
Set the bottom edge of the candle socket in the center of the drip cup and trace a line around it with a sharp pencil or a steel scriber. Then place the drip cup on a block of wood and cut out the disk of tin inside the line, using a series of chisel cuts to follow the line. Take care not to cut the hole too large—it should just fit the candle socket as shown in the sectional drawing, [Fig. 32]. A half-round file may be used to file away any rough or jagged edges left by the chisel cutting.