Abstract: The invention includes a loop in the form of a tangentially flexible cylinder for use preferably in conjunction with pointing devices of the type where the loop can be moved by the user in its axial direction and rotate over two parallel supports that tighten the loop. The loop includes a tangentially flexible support material, suitably thin fabric, with a number of mutually spaced low friction strips parallel to the longitudinal axis of the loop means. The friction material is mainly in the area outside the low friction strips. Great tangential flexibility of the loop is achieved since only little or no friction material is in the area between the low friction strips, at the same time as friction material above the low friction strips can be made arbitrarily thick for the best frictional and wear characteristics.

Abstract: The present invention includes a device suitable for the displacement of a cursor or its equivalent on a monitor. The device comprises a loop (10), mounted in tension around and between two separate shaft devices (20, 30) that can be translated, at least one of which is arranged such that it can be displaced and rotated.

Abstract: A control device comprises a rotatable and translatable bar for controlling a pointing device such as a mouse or mouse-pen associated with the control device. A key for the clicking function is also provided. It is possible to adjust the control device for different types of pointing devices and a friction reducing system is also described.

Abstract: The present invention comprises an inertial stabilizing system to be used preferably in connection with image stabilizing of hand-held optical instruments. An ultralight oscillogyro (1-6) serves as a reference element by which the angular position in inertial space is detected. An electromechanical control system causes a gimbaled part (19) of the optics to assume essentially the same angular position in space assumed by the rotation plane of the rotor of the oscillogyro. The oscillogyro is modified for a widened angular range and the damping of the gyro is utilized for obtaining directly the possibility of target tracking.

Abstract: An image-stabilized optical instrument, such as telescopes and cameras, having an objective (1) and first (2) and second (6) optical reflecting elements following in the path of rays after the objective and, wherever applicable, an ocular (9) arranged after said elements, is characterized by the fact that the whole objective, or one or more parts of the latter, depending on the purpose and the optics used, together with the first optical element (2) forms a stabilized unit, which is freely rotatable, in relation to the casing (7) and the second optical element (6) fixed thereto and, wherever applicable, the ocular (9), around two pivot axes which usually intersect. The suspension point (A,B,C) then substantially lies on the imaginary extension (L) of the optical axis of the objective after the first optical element, if the second optical element would not have been in the path of the optical axis.