초록 ▼

An extendable infra-red antenna is carried in a bay portion of the aircraft normally closed by laterally-swinging, clam-shell doors. Separate, unconnected linkage assemblies driven by a common crank extend and retract both the doors and the antenna. When retracted, the antenna linkage is driven into

An extendable infra-red antenna is carried in a bay portion of the aircraft normally closed by laterally-swinging, clam-shell doors. Separate, unconnected linkage assemblies driven by a common crank extend and retract both the doors and the antenna. When retracted, the antenna linkage is driven into an overcenter disposition but the door linkage is not. As a result, the doors begin to open before the antenna begins to deploy. Conversely, when the antenna is fully extended, its linkage is not overcenter but the door linkage is. The antenna then begins to retract before the doors begin to close. The overcenter relationships cause one member to first move in a direction opposite to that of the other so as to insure against any interference between the moving members. Stop means are provided to permit the antenna to be firmly secured in both its extended and retracted disposition.

대표청구항 ▼

Apparatus for opening and closing a door member and for synchronously extending and retracting a deployable object normally carried in a door-enclosed storage area of a support structure comprising: an elongate drive shaft, means for rotatably driving said shaft in opposite directions, a crank shaft

Apparatus for opening and closing a door member and for synchronously extending and retracting a deployable object normally carried in a door-enclosed storage area of a support structure comprising: an elongate drive shaft, means for rotatably driving said shaft in opposite directions, a crank shaft carried by said shaft, a first and second pair of lever arms rigidly carried by and having different lengths extending radially outwardly of said crank shaft for pivotal movement therewith, separate and independent first and second linkage systems, a first means pivotally coupling said first linkage system to the outer end of said first lever arm, and a second means pivotally coupling said second linkage system to the outer end of said second lever arm, said first linkage system engaging said door member for swingably opening and closing it responsively to said bi-directional rotational movements of said drive shaft and said second linkage system engaging said normally stored object for swingably extending and retracting it responsively to said same bi-directional rotational movements, said first and second coupling means each being pivotally driven by said crank shaft into an overcenter disposition when rotated in one direction but not the other; said first coupling means moving said first linkage system to an overcenter disposition when the door member is opened and the second coupling means to an overcenter disposition when the object is retracted, said overcenter disposition of the second linkage system delaying any extension movement of the object until said door member is partially open and the overcenter disposition of the first linkage system delaying any closing movement of the door member until the object is partially retracted.