Homemade Section Liner
For the rapid and uniform hatching of cross sections this little device will be found to give results equaling most of the high-priced instruments that can be purchased. It consists of a hardwood block used in connection with a 45° triangle. The corners are cut to permit the triangle to slide the desired distance; then, by alternately sliding the triangle and block with the left hand, equal spacings can be drawn without measurements of any kind.
Block Used in a Triangle to Move It at Equal Distances for Making Section Lines
Block Used in a Triangle to Move It at Equal Distances for Making Section Lines
Two different spacings may be drawn with one block by reversing it and two blocks having a different location of the angles will give four spacings, which is about all the draftsman requires in ordinary practice. No alteration of the triangle is required with this device, and it requires but little skill to construct it.—Contributed by J. A. Shelly, Brooklyn, N. Y.