This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
Snowball making is slow when carried on by hand, and where a thrower is employed in a snow fort it becomes necessary to have a number of assistants in making the snowballs. The time of making these balls can be greatly reduced by the use of the snowball maker shown in the illustration.
The base consists of a board, 24 in. long, 6 1/2 in. wide, and 1 in. thick. A block of wood, A, is hollowed out in the center to make a depression in the shape of a hemisphere, 2 1/2 in. in diameter and 1 1/4 in. deep. This block is nailed to the base about 1 in. from one end. To make the dimensions come out right, fasten a block, B, 6 in. high, made of one or more pieces, at the other end of the base with its back edge 14 1/2 in. from the center of the hemispherical depression. On top of this block a lever, C, 20 in. long is hinged. Another block, D, is made with a hemispherical depression like the block A, and fastened to the under side of the lever, so that the depressions in both blocks will coincide. The lever end is shaped into a handle.
Ill: A Device for Making Snowballs Quickly and Perfectly Spherical in Shape
Two uprights, E, are fastened to the back side of the block A as guides for the lever C. A piece is fastened across their tops, and a spring is attached between it and the lever. A curtain-roller spring will be suitable.
In making the balls a bunch of snow is thrown into the lower depression and the lever brought down with considerable force. - Contributed by Abbott W. France, Chester, Pa.