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LAMP STANDARD p.185 it is fitted holes are drilled for rivets. (See C.) The center hole is now drilled 17/32 in. Next the corner cleats to hold the glass are made as shown at D. The L-shaped piece is to be riveted at the bottom of each section. The U-shaped pieces are to be riveted in the corners as at E. There are to be two cleats for each corner. The shade is now smoothed with a fine file and emery cloth. The lamp standard is next made. The drawings with dimensions are shown in Fig. 119. At A is shown the standard assembled. It consists of a l/2-in. steam pipe with coupling screwed on the top end. This coupling forms the fixture, which has three pieces of 1/8-in. steam pipe screwed into it to hold the sockets. These pieces of pipe are threaded their entire length. Three 1/8-in. holes are drilled into the coupling and tapped with a 1/8-in. pipe tap. These holes are not drilled at right angles to the coupling, but on the angle as shown by the pipe nipples in the drawing. The three pieces of 1/8-in. pipe are then screwed into the coupling, and the coupling screwed onto the Pipe-The top part of the standard is next made. This piece should be turned on a machine lathe, but it may be forged. To do this a piece of 5/8-in. round iron is drawn a little on one end and driven into a piece of steam pipe a distance of 1/2 in. |
Hand Forging by Thomas F. Googerty