Arrangement for adjustably mounting an optical direction indicator

Claim 1

1 Arrangement for adjustably mounting an optical direction indicator e.g. a sighting telescope (1) with associated base (4) on a substructure (8) provided with three attachment points (5, 6, 7), adjustable for giving the direction indicator a prescribed direction in relation to the substructure, characterized in that the first attachment point 5 comprises a ball means (11) allowing universal movement of the base (4) about the attachment point (5), the second attachment point (6) comprises a baLL means (22) adapted for movement in an arc with its centre at the first attachment point (5) and with the arc approximately in a plane through the three attachment points (5, 6, 7), the third attachment point (7) comprises a ball means (31) adapted for displacement by a first setting means (34) substantially at right angles to the plane through the three attachment points (5, 6, 7) for pivoting the base (4) and the direction indicator (1) about an axis (9) through the first and second attachment points (5, 6), and also by a second setting means (37) for displacing said baLL means (31) in an arc with its centre at the first attachment point (5) and with the arc approximately in the plane through the three attachment points (5, 6, 7) for pivoting the base (4) and the direction indicator (1) about an axis (10) through the fixed ball joint 5 at right-angles to said plane, and in that the first setting means (34) is a graduated, setting screw (34) acting directly on the ball (31) of the third attachment point (7) and in that the second setting means (37) is a second graduated setting screw (37) connected to the ball (31) of the third attachment point by means of a rigid member (35) universally pivotable at the adjusting screw (37) and at the ball (31)