Abstract:
I. Introduction, Product and its uses
A. The drafting machine has now become a
standard equipment practically in all large
drawing offices. It is definitely established that
by its aid, drawings can be made with greater
accuracy and less fatigue, resulting in an increase
of output.
The drafting machine does all the functions
of the T-square, set square, parallel rule protector
and consists of a protracted head around
which revolves a square with two detachable
scales permanently fixed at right angles to each
other. The unit is surmounted by handle and
is securely anchored to the drawing board by
a double parallelogram of bars which maintains
its parallelism in every position on the boards.
