MAGNETIC SPHERICAL COMPASS Russian patent published in 1996 - IPC

FIELD: navigational instrumentation. SUBSTANCE: invention refers to visual magnetic compasses. Magnetic spherical compass has case, working chamber filled with compass fluid, magnetic sensitive element positioned in working chamber on support and compensator of temperature change of volume of compass fluid which includes cavity filled with fluid communicating with working chamber through connection passage located in vertical axle of case and leak-tight cavity filled with air arranged between working chamber and cavity of compensator with fluid and separated from working chamber by bottom of working chamber and connection passage and in cavity with fluid of compensator - by elastic partition. Connection passage is provided with funnel-shaped element placed in cavity of compensator filled with fluid and facing filling hole in bottom of compass case and with visor in the form of disc placed into working chamber and anchored on columns mounted on bottom of working chamber. EFFECT: simplified design, improved functional stability. 1 dwg