An apparatus for the enlarged display of the north direction in the sky and to the orientation in the free terrain

摘要

An apparatus for the enlarged display of the north direction in the sky and to the orientation in the free terrain, such as on a house bottom piece in the garden, with the display at least of the four cardinal points, consisting of a bearing plate with stationary arranged for this purpose, compass rose with the aid of this fixed compass, the north direction. Dial with an outer circle, which is provided with a scale reading and with a centrally arranged on or in the bearing plate surface or a recessed exception and of a supported there magnetic compass, frequently the compass is not rotatable with respect to the dial and the bearing plate on the receiving surface or in the seat of the bearing plate is arranged, as well as locking means of the dial plate on the bearing plate for fixing of the cardinal points of the compass rose after rotation of the device is shown with its four cardinal points corresponding to the alignment of the magnetic needle of the magnetic compass and thus of the sky the direction of north on the end of the workpiece, in the direction of north pole with its magnetic south pole oriented magnetic needle.