Substance: developments in glider frame, including springs which allow for changes in the wing to compensate for air pressure.
Chanute credits Louis-Pierre Mouillard with recognizing the need for "fore-and-aft movement of the wings in order to preserve the equilibrium."
The patent cites an earlier patent of Otto Lilienthal (not by number but Patent US-1895-544816 is a good candidate); Lilienthal Museum says: "The present invention is an improvement upon the flying-machine recently patented to Otto Lilienthal ...";
Chanute adds seat for operator and spring mechanism, which shifts the wings forward or backward depending on wind-pressure (air resistance); the higher the wind, the further back it will push the wings on springs; "In each case the shifting of the wings compensates for the change in the center of the wind-pressure due to the change in the velocity and operates to keep said center of pressure coincident with the center of gravity, thereby automatically preserving the equilibrium."
Patent documents are at and Google patents
Ausgegeben: 1897/05/18 (source: http://www.museumnet.lilienthal-museum.de/objekta.aspx?id=195);
Inventor location (imputed by HistPat): Chicago, IL, Cook county, IL (FIPSloc=17031)
Other sources marking this patent as relevant: Short's DB
- PTO 244
|Applicant is inventor?||Yes|
|Tech fields||glider, frame, navigation, stability, piloting|
|Filing date||December 7, 1895|
|Full specification filed date|
|Grant date||May 18, 1897|
|Supplementary to patent|
|Related to aircraft?||Yes|
|National tech categories||USPC 244/16|
|Number of citations|
|INPADOC family ID|
|Number of text pages||2|
|Number of diagram pages||1|
|Number of figures||4|
|Number of claims||2|