Todays patent is one of Badeau’s four airship patents.
“My invention has two main phases. On the one hand it relates to
an improved construction of lighter-than-air vessel including an
elongated gas-container, whereby enhanced stability is secured; and
on the other hand it relates to improved steering means whereby is
attained complete control of the movements of the airship parallel
to the surface of the earth. While this improved steering means is
particularly adapted to navigable lighter-than-air vessels constructed
for superior stability according to the other phase of the invention,
it is by no means limited in its applicability to such air-ships, but may
be embodied in any type of vessel designed for navigation of the
NOTE: Despite the title, the USPTO didn't assign any classification
which would indicate that the patent applies to airships.
Badeau's invention incorporates a full-length “propulsion tube”
as the prime mover. (Optional vertical thrusters in separate short tubes
and multiple horizontal rudders to control the altitude of the airship).
No mention of how this long tube is constructed or what prevents its
collapse. Badeau identifies the optional pivoting wings as horizontal
rudders. He doesn’t describe or claim the structure needed to connect
the tunnels, rudders, and the single large buoyant gas cell.
N.B. The claims emphasize that the primary propellers should be inside
and near each end of the propeller tube. This is a classic example of
Burgess' seven "Common Airship Fallacies".