Abstract: A hinge lock which during standstill of a primary control shaft, locks a driven shaft actuating a control element and connected by a gear drive to the control shaft. The arrangement is particularly adapted for control hinges of slats on large aircraft, in which a tangential key free-wheel lock is connected to the driven shaft with at least two tangential keys facing each other and locking in one direction of rotation. An engaging element driven by the primary control shaft, shifts a key release between the tangential keys, depending on the direction of rotation. A transmission is connected between the primary control shaft and the auxiliary shaft such that the speed of the auxiliary shaft is a multiple of the speed of the rotating body of the tangential key free-wheel lock.

Abstract: A device for releasably holding a movable body in a given position with respect to another body includes a pair of opposed mutually spaced end walls and a pair of opposed mutually spaced fixed walls extending between the fixed to the end walls to form therewith a frame which surrounds a given space. A control plate is situated in the latter space for movement between the end walls in a clamping direction or in a non-clamping direction, and on opposite sides of the control plate are a pair of parallel clamping plates which are parallel to the control plate while being spaced therefrom.