Abstract: A mobile irrigation alignment system comprising a base mounted on a first span, a linkage system, and a control system. The linkage system includes a driven arm, drive arm, and control arm. The driven arm is pivotably connected to the base about a vertical axis. The drive arm is pivotably connected to the driven arm about a horizontal axis and includes a distal end configured to rest on an adjacent span. The control arm is linked to the driven arm. The control system determines lateral alignment between the spans based on the control arm as governed by the drive arm and driven arm. The drive arm is configured to retain an upright orientation relative to the driven arm regardless of torsional rotation between the spans so that the position of the control arm and hence the lateral alignment determination is not affected by the torsional rotation between the spans.

Abstract: A mobile irrigation alignment system comprising a base mounted on a first span, a linkage system, and a control box. The linkage system includes a driven arm, drive arm, and control arm. The driven arm is pivotably connected to the base about a vertical axis. The drive arm is pivotably connected to the driven arm about a horizontal axis and includes a distal end configured to rest on an adjacent span. The control arm is linked to the driven arm. The control box determines lateral alignment between the spans based on the control arm as governed by the drive arm and driven arm. The drive arm is configured to retain an upright orientation relative to the driven arm regardless of torsional rotation between the spans so that the position of the control arm and hence the lateral alignment determination is not affected by the torsional rotation between the spans.

Abstract: A mobile tower for use with an irrigation system having horizontally-extending spans, the mobile tower comprising a frame and a number of wheels. The frame includes a crossbeam, first and second diagonal legs, first and second lower gussets, and an upper bracket. The crossbeam, first diagonal leg, and second diagonal leg include tubular members having gusset connectors. The tubular members are interchangeable and adaptable with other tubular members.