Abstract: The present invention provides apparatus and method for mounting a plurality of vertically-spaced antennas (256 or 384) or other devices (262) to a tower (12) of the type having three tower legs (20a-20c), and for both separate and selective rotational positioning of the antennas or other devices. The preferred embodiment includes first (170 or 342), second (170 or 342), and third (204 or 320) support housings that are separately attached to the three tower legs, and an antenna-mounting ring (142 or 292) that circumscribes the tower, and that is rotatably attached to the support housings.

Abstract: The present invention provides an apparatus and a method for mounting and both separate and selective rotational positioning of a plurality of antennas, or search devices, that are attached to the face of a tower. The preferred embodiment includes an antenna-mounting ring, or search-device mounting ring (142) that is attached to the tower (12) by a plurality of support rollers (160, 186, or 219). The antenna-mounting ring is rotationally positioned by a drive motor (214), and by a friction drive element that is connected to the drive motor and that engages the antenna-mounting ring. Preferably, one of the support rollers serves as the friction drive element.

Abstract: The present invention provides an apparatus and a method for mounting and both separate and selective rotational positioning of a plurality of separate antennas, or search devices, on a single tower. Three of the preferred embodiments for use in mounting and rotationally positioning antennas or search devices include an antenna-mounting ring, or search-device mounting ring (142, 292, or 406) that is attached to the tower (12) by a plurality of support rollers (160, 219, or 306). The support rollers are operatively attached to the tower or to the antenna-mounting ring and supportingly engage a circumferential groove (150, 298, or 430) which is located in either the antenna-mounting ring, or in a tower-attaching ring (402) that is interposed between the antenna-mounting ring and the tower.

Abstract: The present invention provides an apparatus for mounting and both separate and selective rotational positioning of a plurality of separate antennas, or search devices, on a single tower of the type having a plurality of vertically-disposed tower legs (20a-20c) and having bracing (22) between adjacent pairs of the tower legs. The preferred embodiments include an antenna-mounting ring, or search-device mounting ring (142 or 406) that is attached to the tower (12) by a plurality of shaft-mounted support rollers (160, 219, or 306).