APPARATUS FOR MARKING ONE OR MORE LINES ON A FRAME SECTION OR THE LIKE

摘要

The invention comprises a simple and reliable mechanical marking device for marking on a frame section for the shipbuilding industry a line that becomes straight when the section is bent to the desired curvature of the frame. The device operates with a physical curve representing the inverted form of the desired curvature and having a reduced scale in the longitudinal direction. The device comprises a frame structure carrying a marking means and a curve follower means that are rigidly interconnected. The frame structure is movable along the frame section in engagement with a longitudinal edge thereof, and the curve is mounted on the frame structure for movement therewith in the transverse direction and for movement relatively thereto in the longitudinal direction of the section with a speed, the ratio of which to the relative speed between the frame structure and the section is the same as the scale of the curve in the longitudinal direction.