Title: Device for releasably holding a movable body

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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. Situated between the control plate and the pair of clamping plates are two rows of tiltable spreading elements which in response to movement of the control plate in the clamping direction tilt to spread at least one of the clamping plates away from the other while maintaining the clamping plates parallel to each other with the tiltable spreading elements tilting in an opposite direction in response to movement of the control plate in the non-clamping direction to permit at least the movable clamping plate to move back toward the other clamping plate, with at least this movable clamping plate adapted to press against a movable body for releasably holding the latter in a given position when the movable clamping plate is spread away from the other clamping plate while when the control plate moves in the non-clamping direction the movable clamping plate is released for movement to a release position adapted to release the movable body for movement. A spring is operatively connected at least with the movable clamping plate to urge the latter toward its release position, and at least the movable clamping plate is completely separate from and unconnected with the frame so as to be freely movable with respect thereto.


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