Description

The base integral with collimator tube support, carries the swinging telescope arm provided on a bearing with spring loaded and thrust plates, this type of bearing eliminates any slack which would otherwise develop with wear. The collimator and telescope tubes are one-piece precision costing in light alloy, concealed helical-action focusing devices are provided. The collimator slit with spring-loaded jaws is of a new and robust design which ensures retention of the initial accuracy. The graduated prism table support, 18cm. dia, is divided in degrees, the vernier reading of 0.1 degrees, is fixed to the telescope arm. Large diameter clamping knobs are fitted for movement control and fine adjustment is provided for the telescope. All bright parts are chromium plated with the base and tubes in synthetic (hamper) finish.