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A positioning device orients an antenna element, or an entire antenna of multiple elements, or other payload requiring positioning relative to a supporting base. The antenna element is pivotally mounted upon the base, and a strut extends from the antenna element to an actuator assembly which moves t

A positioning device orients an antenna element, or an entire antenna of multiple elements, or other payload requiring positioning relative to a supporting base. The antenna element is pivotally mounted upon the base, and a strut extends from the antenna element to an actuator assembly which moves the strut to adjust the orientation of the antenna element. The actuator assembly has two linear actuators which extend from the base, respectively, to opposite ends of a lever which, in turn, connects via a pivot to an end of the strut distant from the antenna element. The lever pivot is located between the ends of the lever at a location closer to one of the ends than to the other of the ends of the lever, such as a two-to-one ratio of lever arm lengths. Use of a first of the actuators by itself serves for the primary source of adjustment of the position of the antenna element. The second actuator provides a backup or redundant mode of the adjustment, and also serves to extend the range of adjustment from that which can be accomplished alone by the first actuator. Each actuator provides linear motion, and may include components such as an electric stepping motor allowing for electronic control of the adjustment in stepwise fashion with fine step control.

대표청구항 ▼

A load positioning device comprising: a lever having a first end, and a second end opposite said first end; a support, and a pivot interconnecting said lever with a load, said pivot being located on said lever colinearly with and between said first end and said second end, said pivot being located c

A load positioning device comprising: a lever having a first end, and a second end opposite said first end; a support, and a pivot interconnecting said lever with a load, said pivot being located on said lever colinearly with and between said first end and said second end, said pivot being located closer to said second end of said lever than to said first end of said lever; a first actuator connected between said first end of said lever and said support and being operative to adjust a first spacing between said first end of said lever and said support, said first actuator having a first telescoping length equal to said first spacing; a second actuator connected between said second end of said lever and said support and being operative to adjust a second spacing between said second end of said lever and said support, said second actuator having a second telescoping length equal to said second spacing; wherein a spacing of said pivot from said support is intermediate said first actuator length and said second actuator length; and operation of either of said actuators serves to adjust an orientation of said load relative to said support.