MAGNETIC COMPASS Russian patent published in 1996 - IPC

FIELD: navigational instrumentation. SUBSTANCE: magnetic compass specifically belongs to visual magnetic compasses and to compasses with optical transmission of readings. It includes case filled with fluid, sensitive element placed on supporting device in fluid. Compass is distinguished by device for temperature compensation of change of volume of fluid. Device has chamber placed above upper surface of fluid in working space of case communicating with this space and filled with fluid. Apart from this device has additional chamber embracing working space along generatrix separated from first chamber by flexible partition and filled with air. EFFECT: enhanced functional reliability. 1 dwg