Patent US-1907-871926

From Inventing aviation
Jump to navigation Jump to search

Extensive experiments which have extended over a period of a number of years have convinced me that the key to successful flying machines is a propeller of high efficiency. A propeller consisting of rotary aero-planes on the lines shown and described has, from actual tests made by me, shown a lifting force of 75 pounds per applied horse power. An aerial locomobile with this type of propeller, built entirely of high grade steel, and having 20 feet extreme diameter, weighs approximately 900 pounds and would have a carrying capacity of 2,400 pounds with applied power of 32 horse power.”

  • Inventor location (imputed by HistPat): Washington, DC (FIPSloc=11001), Northampton county, PA (FIPSloc=42095)
  • Assigned ¼ to Emil Gathmann of Bethlehem, PA
  • Witnesses were relatives it seems: Paul J. Gathmann and Olga L. Gathmann
  • Tech class CPC B64C11/24: Hollow blades

Patent family descending from Patent US-1907-871926

Sources


Year filed 1907
Year granted 1907
Office US
Patent number 871926
Inventors Louis Gathmann
Inventor country US
Inventor location
Applicant person Louis Gathmann, Emil Gathmann
Applicant firm
Applicant type INDIV
Applicant is inventor? 0
Original title Air-propeller for flying-machines
English title Air-propeller for flying-machines
Tech fields propulsion, propeller, airfoil, cargo
Filing date 1907-03-06
Full specification filed date
Application number 1907360818
Grant date 1907-11-26
Granted? 1
Publication date
Supplementary to patent
Related to aircraft? 1
Serial number 360818
Patent agent
Assigned to
National tech categories USPC 416/91, USPC 416/198R, USPC 416/227A, USPC 416/227R
IPCs IPC B64C11/24
CPCs CPC B64C11/24
Family year 1907
First filing? 1
Cites these patents
Citations from after 1930
Application ID
INPADOC family ID
Number of text pages 2
Number of diagram pages 2
Number of figures 4
Number of claims 10