Point position marking device i.e. integrated protector compass, for e.g. tracing direction line of forest fire, has disk including perforations pivoting around axle integrated to plate recessed with arcs arranged opposite to axis symmetry

摘要

#CMT# #/CMT# The device has a transparent disk (1) including four aligned perforations (2) pivoting around a central axle (3) that is integrated to a transparent fixed plate (4). The plate is recessed with two semi-circular arcs (5) having different sizes, where the arcs are arranged opposite to a symmetry of a median axis. An eyelet integrates the transparent fixed plate and the transparent disk. A tracing tool e.g. pencil point or pen nib, is introduced through the perforations. #CMT#USE : #/CMT# Device i.e. integrated protector compass, for marking a position of two points opposite to a central axle on a disk to trace a direction line or cape or a progression axis of forest fire. #CMT#ADVANTAGE : #/CMT# The transparent disk can be pivoted to 360 degrees so as to automatically trace the point situated on one of the perforations when the user traces another point through the other perforation situated on a side of the axis, thus marking the position of the two points opposite to the central axle on the disk for tracing the direction line in an easy and rapid manner without the need for geometrical knowledge or without any risk of error. The configuration of the device permits simultaneous tracing of several lines. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a front view of a point position marking device. 1 : Transparent disk 2 : Aligned perforations 3 : Axle 4 : Transparent fixed plate 5 : Semi-circular arcs.