SURVEY GYROCOMPASS Russian patent published in 2012 - IPC G01C19/38 

FIELD: instrument making.

SUBSTANCE: in the gyrocompass an angle transmitter on a pendulum sensitive element 1 is made in the form of a collimator 2, equipped with a grade grid 3. A sighting system 5 is attached to a casing 4 coaxially to the collimator 2, being coupled with the collimator 2 and equipped with a minute grid of threads 6. A mirror reflector 7 is movably installed between the collimator 2 and the sighting system 5 at the crossing of an optical axis with an axis of rotation as capable of rotation around the optical axis of the sighting system. Rear projection windows 8 in the casing 4 are installed on an axis, an orthogonal optical axis and an axis of rotation, at the same time the mirror reflector 7 is made as capable of optical coupling of the sighting system 5 with the collimator 2 and with the rear projection windows 8. A hollow bushing 9 is equipped with a fixing device 10, and its inner diameter is equal to the diameter of a tail in a standard theodolite.

EFFECT: improved performance parameters of operation under conditions that are hazardous by gas and dust, due to reduction of weight of its set.

1 dwg