<div class="description">
Patent drawing submitted by Sourbieu and Pradel shows two views of an apparatus for steering or controlling the direction of balloons by hand-cranking a series of four rotating sails. (Source: A.G. Renstrom, LC staff, 1981-82).</div>
1852<div style="display: none;">date QS:P571,+1852-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external free" href="https://www.loc.gov/pictures/item/2002722684">https://www.loc.gov/pictures/item/2002722684</a>