from The Century Dictionary and Cyclopedia
- n. A thin plate or board having its edge so cut as to delineate the outline of an object: used to prove the models of the breech and other exterior parts of a gun.
Sorry, no etymologies found.
The positions of the sight-masses are verified by the profile-board, and by reference to the line of sight, traced on them; their form and dimensions by the templates.
The exterior lengths of the gun are measured by the profile-board, marked with the true dimensions, the differences being measured by the foot-rule, or, if minute, estimated by the eye.
For other guns the position of the lock-piece is marked on the profile-board, and their measures taken as above.
In guns of the ordinary construction, the position of the vent is marked on the profile-board, and its inclination to the surface is determined by the protractor and vent-gauge.