US936508A

US936508A - Propeller.

Info

Publication number: US936508A
Application number: US47232609A
Authority: US
Inventors: Theodore Amnelius
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-01-14
Filing date: 1909-01-14
Publication date: 1909-10-12
Anticipated expiration: 1926-10-12

Description

1 T. AMNELIUS.

PROPELLER.

APPLIoATIoN FILED 11111.14, 1909.

936,508. Patented oct.12,19o9.

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PROPE'LLER.

specification of Letters Patent.' v

Patented Got. 12, 1909.

Application filed January 14,71909. Serial No. 13:72,#326.,l

To all whom it may concern;

Be it knownthat I, THEoDoRE AMNELIUS,

citizen of the United States, residing at South Framingham, in thecounty'of Middlesex and State of Massachusetts, have iii-lV vented certain new andfuseful Improvements 1n Propellers; and I dohereby declare the following to be a full, clear,` and. exact description of the invention, such as will enable others skilledinthe art to which it appertains to make and use the same. p

This invention 'relates to propellers designed especially for user on aeroplanes or other forms of airships, but also applicable to any purpose for which a-propeller may be employed.

The object of the invention is to providea device in which each of the principal blades isformed of a plurality of vanes or sub-" blades arranged in the manner hereinafter4 more fully set forth, in order that the eiliciency of such blades and of the propeller as la whole may be greater than in a device in.

which the blades are of ordinary construction.

-In the accompanying drawings: Figure 1l is a plan view of a propeller constructed in accordance with my invention, and Fig. 2 is a view taken at right` angles to the view shown in Fig. 1. o Referring -to the drawings in detail, 1 indicates the hub of my improved propeller,

and 2, 3, and 4 designate the vanes or subblades used in the construction of each ofthe principal blades. Each sub-blade tapers from the innerto the outer end, being wider Aat such outer end, and is connected vwith the hub at an angle to the main axis of the hub, as shown in the drawin s. The individual sub-blades are given a s ight twist vin order that the surfaces may be inclined to a greater degree toward the hub than lat the outer ends, and each sub-blade contacts with the adjoining sub-blade at given points or rather along given lines, but are separated between these places of contact, permitting of the passage `of the water or air betweenthe blades.

Each vane or sub-blade consists of a plurality of sections 5 6 and 7 curved on the arc of a circle, the end of such sections meeting along the lines S. The parts 5, 6 and 7 are termed sections for convenience, but it will be understood that each sub-blade is preferably formed in one piece. The correspond- 1ng-sect1ons of vanes 2 and 4 are located oppos1te each other, but the sections of vane 3 4iare'so arranged that the ends thereof contact withthe middle portion of the archof sections 5 aind of member 2, while'the mid- A dl'e portion of the arches of vane-3 contacts with the ends of the sections: of vane 4.

The various sub-blades are so' propor' tioned and connected with the hub in such manner thata line joining any point on one edge of' sub-blade 4e and a corresponding point on the oppositeedge of blade 2 would lie in a plane perpendicular to the shaft 15, this line passing through the central portion of sub-blade 3.

A propeller constructed in the manner described construct-ion in that it not only ordinary construction in that it not only produces the usual thrust, but the extent of surface acting on the air, or on the water,-

as the case may be, is materially increased without adding to the length or width of the blade. The parachutelikeefl`ect of the sub-blades or vanes, and the grouping of the latter, both contribute to produce this result. The spacing of the vanes permits of the passage of air currents between such' vanes so that the several vanes of each principal blade are acting ,at a given instant upon an independent pendicular to the shaft.

What I claim as new and desire't'o secure Letters Patent on is: l. In a propeller, a hub, a series of prinstratum of air pery cipal blades connected therewith, eachl comprising a plurality of sub-blades, each sub-. blade arranged out of parallel relation with the adjoining sub-blade and formed with a contact portion whereby said sub-blades are spaced apart for the greater portion of theirA length. 2. In a propeller, a hub, a series of principal blades connected therewith, each comprising a plurality of sub-blades the sections of which are curved on the arc of a circle, each sub-blade being arranged out of parallel relation with the adjoining subblade. and formed withv a contact portion whereby such sub-blades are spaced apart for the greater portion'of their length.`

3. In a propeller, a hub, a series of principal blades connected therewith, each com; prising a plurality of sub-blades formed of sectipgns curved on the arc of a circle and contacting at intervals one with the other.

4. In a propeller, a hub, a series of principal blades connected therewith, each comprising a plurali-ty of sub-blades, sections of which present a convex surface on one side and a concave surface on the opposite side, the ends of such sections im one subblade arranfed opposite the middle portion of the sections of the adjoining sub-blade.

5. In a propeller, a hub, a series of principalblades connected therewith, each comprising a plurality of sub-blades7 the-edge of one of said sub-blades being on a line with the opposite edge of an alternate subblade comprising a part of the same prin# cipal blade, such line being perpendicular to the main axis of the propeller.

6. In a propeller, a hub, a series of'principal blades connected therewith, each comprising a plurality of Sub-blades, sections of which are convex on one face and concave Aon the opposite face, the edge of one of the sub-blades being on a line 'with the opposite edge.of an alternate .sub-blade comprising a part of the same principal blade, such line being perpendicular to the lnain axis of the propeller. I

7 In a propeller, a hub, a series of principal blades connected therewith each comprising a plurality of sub-blades, sections of which are convex on one face, and concave on the opposite'face, the ends of sections ot' a given sub-blade arranged Oppssite the .middle portions of sections of an adjoining Sub-blade, the edge of one of said sub-blades being on a line with the opposite edge of the alternate sub-blade comprising a portion of the same principal blade, such 'line being perpendicular to the main axis of the propeller.

In testimony whereof I atix my signature' in presence of two Witnesses.

THEODORE AMNELI'U S. Titnessesz CHARLES F. HATHAWAY, Gro. E. PEOGG.