Patent US-1875-165881

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Airship with propeller and flapping propulsion. Intended for ocean voyage.

In attempting long voyages, as in crossing the ocean, I carry my own gas-generator, that, in case I have to descend on the ocean, in order to get water for the boiler, I am able to inflate the balloon again in order to ascend. The machinery to drive these propellers is constructed in such a manner that it will give to the propellers at least from a thousand to fifteen hundred revolutions per minute. The machinery is so constructed that the fore and aft propeller can be disconnected from each other and work independently. By the disconnection I can make one propeller turn at great speed one way, and the other turns slowly the opposite way. The propeller that works with the wind I give slow speed, and the other that works against the wind the fastest speed, and compel by this operation the balloon and steerable air-ship to stand still in the air over any given point, the side wings standing still at the time.

Side wings:

My steerable air-ship has also two side wings, which are not only a means of propulsion, but also a raising power. From the ship at both sides, through openings, ribs or arms project, from eight to twelve feet long, or any other size, according to the size of the ship and balloon, forming at the outside of the ship a semicircle, with the round part upward and hollow part downward. According to the size of the ship, more or less ribs or arms are needed, each of which arms has its own independent pivot or axle inside the ship, on which it works or swings. Outside these arms are braced together, forming a full frame-work, and are, above and below, covered with canvas, by means of which they form a solid wing. The cuts or openings in the sides of the boat must be large enough to allow the arms to move up and down, as is necessary for the stroke of the wings. [... Internal crank raises and lowers a primary shaft ...] This inside up-and-down motion causes the outside extension of the ribs or arms to make the same motion, and, forming outside a solid wing, flap up and down like the wings of a large bird. These wings are of a curved form, being hollow and round at the top, so as to afford very little resistance in moving upward, but catch the air on the downward stroke and become a lifting-power.

Inventor location (imputed by HistPat): Baltimore city, Maryland (FIPSloc=24510)

Sources

  • Short's DB
  • PTO 244


Year filed 1875
Year granted 1875
Office US
Patent number 165881
Inventors Frederick W. Schroeder
Inventor country US
Applicant person
Applicant firm
Applicant type
Applicant is inventor? Yes
Original title Improvement in steerable air-ships
English title Steerable air-ship
Tech fields LTA, rudder, flapping, propeller, propulsion, frame, balloon
Filing date July 1, 1875
Full specification filed date
Application number
Grant date July 20, 1875
Granted? Yes
Publication date
Supplementary to patent
Related to aircraft? Yes
Serial number
Patent agent
Assigned to Frederick W. Schroeder, George W. Gail
National tech categories USPC 244/28, USPC 244/99
IPCs
CPCs CPC B64B1/00
Family year 1875
First filing? No
Cites these patents
Citations from after 1930
Application ID 45840428
INPADOC family ID
Number of text pages 2
Number of diagram pages 3
Number of figures 3
Number of claims 3