B. R. Winslow

Magnifying Glass Holder 231

For very fine work in the drafting room and the shop, it is advisable to use a magnifying glass. It saves the strain on the eyes, prevents ruffled tempers and makes neater work possible. To work through a glass, however, some means must be provided for holding the glass in position and allowing a free use of both hands. Such a support must be so constructed that the glass may be placed at any angle and in any position. The drawing illustrates a satisfactory support, the construction of which is quite simple, and the cost of material a mere trifle.

The following material will be required: 2| feet of well seasoned oak strip, 1 1/2 in. wide and 5-16 in. thick ; two wooden balls about 1 1/2 in. in diameter; two thumb bolts 1 3/4 in. long, and a reading glass at least 3 in. in diameter. The balls can be purchased at a toy store for a penny each. They are usually painted, but this can be easily scraped off.

From the oak strip cut two pieces 3 in. long, and with a bracket saw or knife, shape them as shown at a, Fig 1. The circles which form the ends are 1 1/2 in. in diameter, and the connecting strip is fin. wide. In the center of each of the end circles bore a hole 9 16 in. in diameter, c, Fig. 1. Next bore two holes in each centerpiece, b b, Fig. 1, 1/4 in. in diameter, about 2 1/2 in. apart, and equal distances from the ends.

In one of the wooden balls, e, Fig. 2, bore a | in. hole about half way through the ball. In the other ball, i, Fig. 2, bore a hole large enough to take the handle of the reading glass,/, making a tight fit. From the oak strip cut a peg, h, Fig. 1, | in. in diameter, and about 1 1/2 in. long, and fit one end tightly in the hole in the ball c, Fig. 2. Take a piece of the oak strip one foot long and bore a 3/8 in. hole in one end, g, Fig. 1. and in this hole fit the other end of the peg h, making it tight. Glue may be used in both cases.

Countersink the nuts of the thumb bolts in the holes bb, in one piece, a, Fig. 2. Insert the thum bolts d and d in the other piece, e, Fig. 3, and screw them part of the way into the countersunk nuts. Fit one end over the ball e, Fig. 2, and screw the lower bolt tight. Fit the other ball, i, in the other end and tighten the upper bolt. The assembling of the parts is shown clearly in the drawing. Fit the handle of the glass in the hole in the ball i, and it is ready for use.

If the thumb nuts shown in the drawing are not readily obtainable, 1/4-in. machine bolts, If in. long may be used by countersinking the bolt heads in one piece and screwing a thumb nut on the other end in place of the regular nuts.

When in use the base g rests on the drawing board or bench, being held securely by the clamp. If clamps cannot be used, the support maybe firmly attached by means of a long screw eye in the extreme end. A little manipulation of the support will soon demonstrate that the glasses can be held at any angle and in any position. To change the position of the glass it is only necessary to loosen the bolts a trifle.