Public Domain; Published in 1923; Courtesy of the Kansas Historical Society
View this photo at kshs.org
BH Photo #501455
Possibly some info for you on this one.
The structure seems to follow a patent by Frederick H. Smith. U.S. Patent 128,449 (1872).
Haven't found a full shot, so I couldn't tell you.
The image seems to show the 'vertical' compression members leaning towards the center. Would this be an inclined endpost Post truss?