US971409A

US971409A - Propeller.

Info

Publication number: US971409A
Application number: US51576709A
Authority: US
Inventors: Theodore Roggenbuck
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-09-02
Filing date: 1909-09-02
Publication date: 1910-09-27
Anticipated expiration: 1927-09-27

Description

T. ROGGENBUGKi PROPBLLEB..

APPLIoATIoN FILED sans, 1909.

Patented Sept.27, 1910.

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PROPEILER.

Specification of Letters Patent.

Patented Sept. 27, i910.

Application filed September 2, 1909. Serial No. 515,767.

To all whom it may concern:

Be it known that I, THEODORE ROGGEN- BUCK, citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Propellers, of which the following is a specification.

My invention relates to improvements in propellers which are designed for movement in liquids or aerial fluids.

It consists in a novel construction of propeller blades having overhanging extensions at the ends, and inturned flanges from the ends of the projecting overhangs.

It also comprises details of construction which will be more fully explained by reference to the accompanying drawings, in which- Figure l is a perspective view of the propellers. Fig. 2 is a plan. Fig. 3 is a side elevation.

It is the object of my improved propeller to provide a means whereby the fluid in which it revolves will be retained, and prevented from being thrown outwardly by the centrifugal action of the propeller, and by being thus retained, to concentrate the action in the direction in which it is desired to drive the vessel to which the propeller is attached. By means of the overhanging attachments I am enabled to produce a certain amount of compression in the direction of travel.

As shown in the accompanying drawings, A is a shaft to which propeller blades 2 are attached. These propeller blades may have any suitable or desired pitch, and from the outer ends of the blades projecting plates or segments 3 extend substantially parallel with the axis. These plates or segments extend the full length of the outer ends of the propeller blades, which are here shown as divergent from the center, and the plates are extended rearwardly from the front edges of the blades, as shown. The rear edges of these plates have inturned flanges 4 of shallow depth, and the plates may also be curved upon the radius of the axis of the propeller blades, so that they will be easily impelled through the fluid in which they re volve. I prefer to converge the plates slightly from the front to the rear, and they may also be inclined inwardly.

The operation will then be as follows: The propeller blades being revolved, and having any desired pitch, will impinge on the fluid through which they are revolving, with a tendency to force the fluid back, or advance the apparatus to which they may be attached. At the same time the ovcrhanging plates 3 will cause a body through which the propellers revolve, which is of equal diameter with the propellers, to be retained within the circle of revolution of the propellers. The inturned flanges l are here shown as being deepest at the front and gradually converging to an apex at the rear; the general effect being to in a measure compress the fluid, if it is air or an eleastic fluid, and to considerably increase the effective work of the propellers.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. The combination in a propeller of radial and pitched vanes, said vanes having overhanging plates at the ends with the outer edges of said plates inturned substantially toward the axis of the propeller.

2. The combination in a propeller, of radial and pitched blades having overhanging transverse plates at the outer' ends, said plates having lianges inturned substantially toward each other and toward the axis of the propeller.

3. The combination in a propeller, of radial and pitched blades, overhanging plates extending transversely from the outer edges of the blades said plates having inturned flanges projecting from their edges, and said plates being sections of a cylindrical surface coaxial with the propeller.

4. The combination in a propeller, of radial and pitched blades having curved transverse plates at the outer ends, and inturned convergent flanges projecting from the edges of the plates substantially toward the axis of the propeller.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

THEODORE ROGGENBUCK.

Witnesses:

GEO. H. STRONG, CHARLES EDELMAN.