Patent US-1911-989786

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This was a self-correcting plane to stabilize an airplane, with additional “rocker”; with keel, rudder, etc; conical surfaces, concave downward (i.e. half-cones opening down); “Experience has shown that it is not difficult to lift a comparatively large weight by the reaction between the supporting surface and the air, but with all the types of machines which have previously been devised, it is a very difficult matter to maintain equilibrium, requiring the constant attention of the operator”

Inventor location (imputed by HistPat): Brooklyn, NY, Kings county, NY (FIPSloc=36047)

Sources


Year filed 1910
Year granted 1911
Office US
Patent number 989786
Inventors Ulysses Grant Lee, William Austin Darrah
Inventor country
Applicant person Ulysses Grant Lee
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Flying-machine
English title Flying machine
Tech fields airplane, frame, stability, rudder
Filing date 1910-02-15
Full specification filed date
Application number 1910544143
Grant date 1911-04-18
Granted? 1
Publication date
Supplementary to patent
Related to aircraft? 1
Serial number 544143
Patent agent
Assigned to
National tech categories USPC 244/153R
IPCs IPC B64C3/14
CPCs CPC Y10S244/901
Family year 1910
First filing? 1
Cites these patents
Citations from after 1930
Application ID 47423730
INPADOC family ID
Number of text pages
Number of diagram pages
Number of figures
Number of claims