Bevel protractor, for use in construction in marking the position of an angle bisector, has a simple arrangement of hinged limbs that are inserted into the angle so that a middle limb indicates the position of the angle bisector

摘要

Bevel protractor for marking out or plotting the position of an angle bisector, for any articulation angle. The protractor has a simple design of limbs linked together with winged nuts or similar. Once positioned the middle limb of the device always shown the angle bisector, so that it can be easily plotted or marked by a user.