Patent BE-1913-250417.258001

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Patent BE-1913-258001
Error creating thumbnail: File missing
250417.258001 featuring peculiarity of number writing and informality of protocols


"L’hélice verticale est remplacée par une hélice horizontale dont le centre de traction est en arrière du centre de gravité de l’appareil."

That is, "The vertical propeller is replaced by a horizontal propeller of which the central point of traction is behind the aircraft's centre of gravity".

(This should have the effect of gravity acting in favor of forward momentum, while lift from the propeller compensates and maintains elevation.)

(traction, per se, is key in this case in that the "pull" doesn't act directly in terms of propulsion, per se, but in terms of ascension. This is suggestion of helicopter.)

  • Inventor location: 137 ave de la Couronne, Ixelles, Brussels, Belgium
Year filed 1913
Year granted 1913
Office BE
Patent number 258001
Inventors Henry Félix Villard
Inventor country BE
Applicant person Henry Félix Villard
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Aéroplane
English title "Airplane" suggestive of helicopter in which lift is facilitated by way of a horizontal propeller using gravity in favor of forward momentum
Tech fields propeller, airplane, hybrid, traction
Filing date July 1, 1913
Full specification filed date
Application number
Grant date July 19, 1913
Granted? Yes
Publication date
Supplementary to patent Patent BE-1912-250417
Related to aircraft? Yes
Serial number
Patent agent
Assigned to
National tech categories BE K
Family year 1912
First filing? No
Number of citations
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Application ID
Number of text pages
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