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Disengageable-control-column-for-a-copilot-of-an-aircraft

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Disengageable control column for a copilot of an aircraft

Details

Inventors: Barnoin, Pierre; Cas, Jacques M.;
Assignee: Societe Nationale Industrielle et Aerospatiale (FR)
Primary Examiner: Barefoot; Galen L.
Assistant Examiner:
Attorney, Agent or Firm: McGlew and Tuttle

The invention relates to a control column (2) for a copilot of an aircraft, coupled for control of roll and pitch by a linkage (5) to the pilot's control column (1). This linkage comprises two parallel rods (6,7) pivoted on the one hand to the column (1) and on the other hand to a member (13) connected to the column (2) by a double universal joint (14, 17). When operative, the column (2) is locked to the member (13) by a lock bolt (19). This control column can be put out of action by releasing the said bolt and can be secured by hooking to a fixed point, in which case the double universal joint (14, 17) ensures its disconnection from the column (1) and thus prevents any misoperation.

DETAILED DESCRIPTION The present invention relates to a copilot's control column equipped with an instantaneous disengagement and engagement mechanical device which prevents the accidental displacement of the control column, while enabling the copilot to intervene at any time in accordance with the requirements of the mission.
To this end, according to the invention a double universal joint is interposed between the rods of the aforesaid coupling linkage and the copilot's control column, this double universal joint comprising an outer ring and an inner ring and the two articulation axes of the said rings intercrossing at the pivot center of the said control column, its outer ring being articulated to the aforesaid shaft, on the one hand, and on the other hand being fastened to a member articulated on the aforesaid connecting rod, while the said control column is connected to the said member by a releasable locking device which makes it possible to fasten together and unfasten at will the control column and the outer ring of the double universal joint.
When they are fastened together, the copilot's control column is coupled to the pilot's control column and permits normal piloting of the aircraft.
When the copilot's control column is disconnected from the said outer ring, the double universal joint completely separates this control column from the pilot's control column, so that the copilot's control column is thus put out of action since the linkage can then operate only through the action of the pilot's control column.
In one advantageous embodiment the locking device for the copilot's control column comprises a bolt projecting coaxially from the end of the control column and engaging for locking purposes in a keeper formed in the bottom of a bowl-shaped part of the said member fastened to the outer ring, while the control column can slide longitudinally in the double universal joint, unlocking being effected by pulling the control column in such a manner as to move the bolt out of the keeper

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