US933151A - Propeller. - Google Patents

Description

AMNELIUS.

' PROPELLER.

APPLICATION TILED APR. 0, 1909v I Wnup Elvwenioz Patented Sept. 7, 1909.

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Witnesses 12m? J 4 (L -1n L's/1 W" 4 is a view similar to Fig. 2 with the rnnonorm amvnmus, or soUTH FBAMINGHAM, mAssAoHUsE'rTs.

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Specification Of LCttGIS Patent.

Patented Sept. 7, 1909.

Application filed April 6, 1909. Serial No. 488,245.

To allwhom it may concern:

Be it known that I, THEODORE AMNELIUs, a. citizen of the United States, residing at South Framinghamfln the county of Middlesex and $tate of Massachusetts, have invented certam new and useful Im rovements 1n Propellers; and I do hereby eclare the following to be a full,-clear, and exact de scription of the invention, such aswill enable 'others skilled in the art to which it apperta ns to make and use the same.

TlllS invention relates to propellers, adapted for use wlth any approved craft moving in a fluid medium.

An object of the invention is to providea propeller having a-plurality of blades positroned forengagement with the fluid med1um and of. conformation to prevent the centrifugal discharge of the medium from the ends of the propeller blades A further ob ect of the invention is to provide a propeller having integral blades attached to a hub of improved construction. With these and other objects in view, the lnventlon comprises certain novel constructions, combinations and and claimed.

In the drawings :Figure 1 is a view of the improved propeller in rear elevation. Fig. 2 is a view of the propeller in side or edge elevation. Fi 3 is a view of the hub with the propeller b ade broken away. Fig;

hu sections separated.

Like characters of. reference designate corresponding parts throughout the several views. I Y o I Like co-pending application No. 472,326, the device which forms the subject-matter of this application comprises a plurality of propeller blades mounted s1de as m that application is here illustrated as composed of three sub-blades. In the present Instance the sub-blades are provided w1th a plurality of curves as 10, 11, 12 and13,

the curve lobeing preferably provided with two'faces, 11 with three faces, 12 with four faces, and 13 with five faces, such faces be ing preferably plain and set at an arigle to its adjacent face as clearly shown at 1g. 2.

In addition to the number of faces increasing from 10 to 13 the size of the curvesalso increases, the size of the faces remaining.

substantially the same and the area of the curved portions increasmg as the number of arrangements ofparts, as W111 beheremafter fully described y'side and here shown formed integral or rigid with the hub and as shown at Fig. 1 three of the sub-blades are connected wlth each of the hub sections. The device is mounted on a shaft as 14 and the hub sections are shown as a whole at 15 16 and 17. The hub section 15 is intended to be the first hub section upon the shaft 14 and is provided with a recess 18 positioned to receive the overhang 19 of the hub section 16, said hub section 16 being also provided with a recess 20 proportioned to receive the overhang 21 of the hub section 15.

Preferably the hub sections are provided for convenience with as many of such recesses and overhangs as the number of blades so that one of the overhangs is practically formed by the inner extremity of the blade faces. The sub-blades are, of course, as.

while therecess is dis osed between adjacent hang 23 of the hub section 17 which, in like manner, is-provided with a recess 24 adapted to receive the overhang 25 of the hub section 16. The recesses and overhangs of the hub sections 16 and 17 are the same essentially as the recesses and overhangs of the sections 15 and 16 and similarly dis osed.

As shown in Fig. 4 the ub sections are separated showin the recesses and overhangs while in Fig. 3 the hub sections are shown in engaging position and held in such position by the shaft. p

While the propeller has been here shown as rovided with three sub-blades it is to be understood that an approved number of blades may be emp oyed and in case more than three blades are employed all the intermediate blades are provided with hub seethe nut 26 uponthe extremity of tions similar to the hub sections 16, the outer hub sections only corresponding to the hub sections 15 and 16.

What I claim is 1. A propeller provided with mg a plura it plurality of p a blade havofcurves made up each of a ain faces disposed, at an angle to each other with the numberof faces 1ncreasing from the endof the blade. 2. In a propeller,

ity of curves ncreasing in area from t e centen to the peripheral end, such curves being com osed ofp ain surfaces of substantially aqua width disposed atangles to each other.

center to the peripheral a blade having a lural- 3. In a propeller, a plurality of sub-blades each provided with a plurality of similar curves similarly ositioned and each composed of a plurality of plain faces disposed at angles to each other.

4. In a propeller, a hub provided with a plurality of blades and with a recess and overhan for each blade, and an adjacent hub section provided with a recess to receive the overhang, and an overhang to engage within the recess.

5. 'In a pro ller, a plurality of hub sections, a plura ity of blades, the central secsections each tion being provided with two recesses and two overhangs for each blade, and outer hub rovided with a recess to receive each of t e overhangs of the inner hub section, andan overhang to engage within each of the recesses of such inner hub section.

In testimony whereof I aflix my signature in presence of two witnesses.

THEODORE AMNELIUS.

Witnesses: v

O. MITCHELL, THOMAS H. OCo mon.

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