DE444944C - Propulsion or buoyancy devices for aircraft - Google Patents

Description

GERMAN EMPIRE

ISSUED May 27, 1927

REICH PATENT OFFICE

PATENT LETTERING

-M 444944 CLASS 62 b GROUP 39

(F57729 XIj62b)

Hans Fleischmann in Wilhelmshaven.

Propulsion or buoyancy devices for aircraft.

Patented in the German Empire on January 3, 1925.

To propel or lift aircraft, it is in the interest of saving energy it is often desirable to use the largest possible area. You already have hinge-like surfaces hinged together so that they can be opened and closed alternately. The opening and closing happens in a known device by counter-rotating eccentrics, but here one is missing simultaneous reciprocation of the surfaces.

In the present invention, the outer portions of such surfaces are on the tenons

Claims (1)

two counter-rotating cranks articulated, with their rotation the surfaces free and suddenly swing back and forth while fully unfolding and closing again will. One embodiment of this is shown on the drawing. Fig. Ι shows a view of the new drive device; Figs. 2 to 5 illustrate four different positions of the striking surfaces during one revolution of the cranks in the direction indicated by arrows. The surfaces a are connected in a hinge-like manner on the inner sides by fitting parts b , and the outer parts are rotatably fastened to the pins of the cranks c by ball bearings, but are otherwise completely free-swinging. The shafts of the cranks run parallel to one another in the bearings and are set in opposite rotation by the ao gears £, whereby the surfaces u are alternately opened and closed in the manner illustrated in Fig. 2 to 5 and simultaneously moved back and forth. as In. Fig. 2 shows the highest level of the crank pin and the surfaces α attached to them. Through the following downward movement to the outer middle position of the cranks c in Fig. 3, the surfaces # are fully expanded, the inner sides of which are suddenly moved downwards with great acceleration. The further downward movement to the deep Fig.i. first crank stand in Ahb. 4 this impact effect is also achieved by the outer parts of the surfaces. Up to the inner middle position of the cranks c in Fig. 5, the surfaces a are completely folded together and lifted, while they are moved further up to the maximum position in Fig. 2 and are spread out again for the start of the flapping movement. If the engine z. B. between two horizontally lying crankshafts with two each Arranged cranks, so lift is generated, while with vertical crankshaft arrangement the subject of the invention will act as a propulsion means. With the same application of the subject matter of the invention for watercraft would the jerky and sudden movements of the instinctual surfaces are similar to human ones Swimming movements work. PATENTAiJSl ¹ KUCIl: Propulsion or buoyancy device for aircraft, consisting of two hinge-like articulated surfaces which are alternately opened and closed, characterized in that the Driven by two similar counter-rotating cranks with parallel shafts, the outer parts of the striking surfaces are hinged to the crank pin. Fig. 2. Fig. ₃ . Fig. 4. Fig. _S.