US955291A - Propeller-wheel. - Google Patents

Description

:A. E. SB'LTZBR.

PROPER-EB WHEEL.

urucuxon mum AUG.18,- 1909.

QW fimmzsez ze Patented Apr. '19, 1910.

a m nivan STATES PATENT oFrIcE;

' ABRAM E. SELTZER,

or MIAMI, FLORIDA.

PRorEtLnEwHEEn To all whom it may concern;

Be it known that I, ABRAM E. SELTZER, a

citizen of the United States of Americarre siding at Miami, in the county of Dade and State of Florida, have invented certain new and useful Improvements in Propeller- VVheels, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to pro ellers for boats and the principal object 0 the same is to provide novel types of blades for the propeller by means of which the pressure is exerted to push and pull the water away from the boats hull so that none of the water will be driven against the hull with the 'usual speed retarding effect.

In carrying out the object of the invention generally stated above, it is contemplated employing blades which have a twisted shank connect-ion with the hub of the propeller, the body of each blade being flat and presenting an outer edge which is arranged in the arc of a circle and on a compound curve so that oppositely projecting ends are provided, the ends of'each blade slightly over lapping the ends of adjacent blades and arrangedvin difi'erent planes to permit the water to be-forced rearwardly and through the openings between the overlapped ends of the blades. r

In the practical application of the invention, it-wlll, of course, be readily understood I that changes in detail and structural arpre Figure 14 is a front elevation of the improved propeller. Fig.8 is 'an edge view thereof.- Fig. 3 is a central sectional view taken on the line 3'3, F

' l 1'. Referring to said drawings by numerals,

' 1 designates the hub-of the improved pro-- gelle'r from which the shanks 2 radiate. a1d fshanksare slightly twisted and merge into the flat bodies 3 of the blades. The blades are shown. as. three in number, although -obviously more or less may beem- Specification of Letters Patent.

rangements may be resorted to, but one erred and simple embodiment thereof is shown in the accompanying drawings,

where1n ployed, and each blade. is a segment of a circle. The peripheryof each blade isin the form of a compound curve as indicated at 4=to provide a forwardly-projecting end portion 6, the end edges of which are straight, as indicated at. 7. The longitudinal edges 8ofthe shanks 2 merge into said between each pair of shanks.

as said ends are projected on curves In an propeller. It will thus be seen that the tained while moving either forward or backward; and. that the centrifugal pressure of duced.

What I claim is my invention is posed at right angles to the axis of the hub,

compound cu'rve, said blades being ,a' segment of a circle and provided with a for- ,wardlfy and rearwardly projecting end, and arran ed so that therearwardly projecting end of the forwardly projecting end of the 'adja tween ovoidal openings which are arranged each opening being proximate the hub.

signature in presence of two witnesses.

, -ABRAM E. SELTZERP I Witnesses: a 1 ORLo EDWARD HAINLIN,

- WILLIAM FRANKLIN MILLER.

portion 5 and a rearwardly-projecting end bearing surfaces of the blades are increased; that a similar force of propulsion is obthe water around the hub is considerably remedially of 'the hub, the larger portion of,

. Patented Apr. 19, 1910.

' F v Application filed August 16, 1909. Serial No. 513,091. v,

.A propeller comprising a hub, shanks radiating therefrom, said shanks being disa blade carried by each shank having a flatbody with its marginal edge presenting a one blade overlaps in spaced relatibn I cent blade, and the shanks having therebe- In testimony whereof I hereunto aflix my

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