The insulation should now be removed from the wire on the upper edge of the fiber ring with a piece of fine sandpaper, so that the spring on the under side of the movable arm may make contact with the winding. The rheostat is now complete with the exception of a coat of shellac. A cross-sectional view of the completed rheostat is shown in Fig. 3.
Folding Arms for Clothesline Posts
The inconvenience of using a number of clothesline posts and the limited space available resulted in the making of a clothesline post as shown in the sketch. The entire line is supported on two posts, which should be about 6 in. square and are set in concrete. The upper ends of the posts are equipped with two arms, hinged to the sides of the posts in such a manner that the inside ends of the arms will meet on top of the post when they are in a horizontal position. Each arm is provided with three wood pins, equally spaced for the line. The arms are supported in a horizontal position by two bars of metal at the center, as shown. Holes are bored into the sides of the posts to receive the pins when the arms are at rest.
A Post That Provides a Way to Hold Six Lines Taut without the Use of Props
A small box is fastened to one post, to provide a place for the clothesline and the clothespins. The line, when put up, gives space for an entire washing without the use of a prop, as the line can be drawn taut enough to hold the garments.—Contributed by Olaf Tronnes, Evanston, Ill.
A Folding Bookrack
Having need of a bookrack which I could pack away in my trunk and still have room for my clothes, I made one as follows: I procured a piece of pine, 5/8 in. thick, 6 in. wide and 18 in. long, and laid out the plan on one side. Holes were drilled in the edges, 3/4 in. from the ends, to receive 1-1/2-in. round-head brass screws. The design for the ends was sawn out with a scroll saw and the edges smoothed up with fine sandpaper, whereupon the surfaces were stained and given a coat of wax. The screws were put in place to make the ends turn on them as on a bearing. In use the ends were turned up.—Contributed by Spencer Hall, Baltimore, Maryland.
The Ends of the Rack Turn Down, Making a Straight Board