Improvements in and relating to Sighting and Aiming Devices for use on Board Ship or in connection with Ship's Guns.

摘要

8941. Petravic, J. von. May 3, 1909, [Convention date]. Gyroscopic apparatus.-A telescope 22, which may form part of a range-finder &c. and is capable of vertical and lateral adjustment, is mounted on a gyroscope 4, 6, which is by itself stable but becomes a neutral gyroscope when the sighting-instrument is attached and the final adjustments made, the centre of gravity of the sighting-instrument and gyroscope being made to coincide with the point of intersection of the cardan axes. In this way the telescope is arranged to remain for a short time fixed in direction, and, as the outer cardan axis can be connected to the trunnion of a gun or guns by means of levers 29, 32, 31, a pointer 27 on the axis by its registration with a mark 34 on the arm 29 will show when the gun is laid on the same object as that sighted by the telescope.