Central-angle radius compasses

The utility model relates to central-angle radius compasses, which belongs to the technical fields of writing or drawing appliances of a printing subsection of a working and transporting part, writing or drawing articles of a main class of office articles and circular-curve drawing instruments or similar instrument groups of a subclass of writing or drawing auxiliary articles according to the division of international patent classification (IPC). The central-angle radius compasses of the utility model mainly overcomes the deficiency that traditional compasses can not make a circle with a specified radius or a circular arc with a specified central angle. The technical scheme has the key points that a dial and a rotating handle are combined to determine the central angle, and a vernier and a fixing device are used for determining the radius of the circle. The utility model can be widely applied to the aspects of drawing, engineering drawings, mechanical design and the like.