Patent GB-1906-13959

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This patent makes reference to a French priority date filing 1905-06-21, that is to Patent FR-1905-361570.

This is an engine with specific reference to aerial navigation. Invention per se not clear. It may include a transmission device connecting the motor to the motive means. Much discussion of the need to accelerate the air, regardless of its velocity, and something about vibrations.

This is a nice case, with some phraseology having led to thoughts on propulsion, and even to flapping. It is a fairly rare case, in which mechanized surfaces do act upon atmospheric air, though they are reacting to the effects of said air, in the interests of stability and so forth, rather than in the direct interests of propulsion or ascension.

  • Inventor location: Lentz at 123 Kurfurstendamm, Halensee, near Berlin, Germany ; Bellens at 43 Rue de Chezy, Neuilly-sur-Seine, France
  • Inventor occupations: engineers both


Year filed 1906
Year granted 1908
Office GB
Patent number 13959
Inventors Hugo Lentz, Charles Bellens
Inventor country DE, FR
Applicant person Hugo Lentz, Charles Bellens
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Improved Process of and Means for Acting upon Atmospheric Air or any Fluid for the Purpose of Recuperating therefrom a Contrary Reaction
English title Mechanized surfaces reacting to and acting upon atmospheric air or other fluid, in the interests of stability
Tech fields Stability, Control, Subsystem, Aerodynamics, Equilibrium
Filing date 1906/06/18
Full specification filed date 1906/06/18
Application number
Grant date 1907/06/18
Granted? No
Publication date
Supplementary to patent Patent FR-1905-361570
Related to aircraft? Yes
Serial number
Patent agent Haseltine, Lake & Co.
Assigned to
National tech categories
Family year 1905
First filing? No
Cites these patents
Citations from after 1930
Application ID
Number of text pages 4
Number of diagram pages 1
Number of figures 6
Number of claims 4