Abstract: A tool support assembly having bi-directional position control. A tool support element is positioned within a housing and movable axially therealong in response to applied axial force F on a control element. A bi-directional positioning assembly links the tool support element to the housing and includes at least one detent element affixed to the housing and having at least one detent which extends transverse to the axis of the housing. The positioning assembly further includes at least one latch element captively positioned within the housing and selectively movable along the axis relative to the housing. The latch element includes at least one lock arm which is resiliently biasable toward one of the detents and is adapted for selective engagement therewith. A control element is captively positioned within the housing and is movable relative to the housing along the axis.

Abstract: The mount disclosed herein facilitates the mounting of a radar antenna on a sailboat subject to heeling. A pivotable bracket providing a single horizontal axis of rotation only is supported on the upper end of a tube which surrounds the lower portion of the usual sailboat backstay, the tube preventing rotation around the backstay. The antenna is mounted with its center of gravity below the pivot axis and viscous damping is provided to prevent uncontrolled swinging of the antenna.