Adjustment device for platform mounted horn antenna

Claim 1

Apparatus for adjusting the orientation of a first axis of rotation of an antenna assembly that is rotatable supported by a baseplate, where the first axis of rotation extends through axially aligned trunnion pipes on the antenna assembly and the baseplate has a top and a bottom, said apparatus comprising: a rigid member having a threaded exterior surface and having a longitudinal second axis of the threads; means for rigidly attaching said threaded member to the baseplate with said second axis substantially orthogonal to the top of the baseplate; first nut means screwed onto said threaded member; a rigid tubular shaped enclosure having an opening through one side thereof that is dimensioned for making a smooth sliding fit over said threaded member; second nut means screwed onto said threaded member with said one side of said tubular enclosure on said threaded member being located between said first and second nut means; clamp means attached to and rotatably supporting one of said trunnion pipes; and means for rigidly attaching said clamp means to said tubular enclosure so as to support the antenna assembly for rotation about said first axis of rotation; adjustment of the orientation of the first axis of rotation of the antenna assembly being varied by screwing said first nut means relative to the exterior of said threaded member whereby the antenna assembly is levelled in a first plane including said first axis of rotation of the antenna assembly and being substantially orthogonal to the baseplate, the second nut means being tightened against the side of said enclosure opposite said first nut means for fixing the orientation of the first axis of rotation of the antenna assembly.