Abstract: A single or dual input-axis Coriolis gyro sensor is comprised of a single planar inertia-member (10) connected to a coplanar counter-inertia (13) by a first set of elastic beams (12). The counter-inertia is in turn supported by a second set of coplanar elastic beams (15). The counter-inertia counteracts the reaction forces from the vibrating inertia-member and isolates the inertia-member from external vibrations. The inertia-member is angularly dithered about its center of gravity along an axis perpendicular to the plane. An input rate about a first or second orthogonal axis, locate in the plane of the sensor results in Coriolis moments, causing angular oscillations of the inertia-member. The angular oscillations are restrained by squeeze film damping and voltages applied to electrostatic damping electrodes. The electrode voltages are representative of the angular input rates.

Abstract: A liquid bearing having general utility but beneficial use in a gyroscope comprising Peltier elements which remove heat from a holder and from the thrust and journal bearing, and a low viscosity lubricant such as n-heptane or a fluorocarbon is introduced into the evacuated gyroscope casing to fill the voids therein. The low viscosity lubricant surrounds the journal and thrust bearings. When a source of current is applied to the Peltier element, heat is removed from the journal and thrust bearings and a condensate of the low viscosity lubricant is formed on the untreated bearing surfaces, thus cooling the bearing. This heat is conducted away from the bearing surfaces via the holder, the bearing sleeve, and the Peltier elements. Grooves are formed on the bearing shaft to urge flow of the low viscosity lubricant through and around the bearing surfaces by capillary action. An alternate manner for removal of heat from the bearing surfaces, in lieu of the Peltier elements, is provided in the use of a heat pump.

Abstract: A vibratory gyroscope including a cylindrical casing with a vibrating assembly attached inside, the vibrating assembly consisting of two tubes each fitted with two concentric cylindrical weights with each tube connected to the casing using a gimbal system fitted longitudinally between weights with means, preferably an elastic rod, connecting the two tubes to form the vibrating inertial assembly.