US958599A - Propeller. - Google Patents

Description

UNITED sTATEs PATENT oEEIcE.

MANSFIELD CO0KSEY, 0F BALTIMORE, MARYLAND.

PBOPELLER.

Specication of Letters Patent. Application led September 1, 1909. Serial No. 515,600.

To all whom. it may concern:

Be it known that I, MANSEIELD CooxsEY, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented new and useful Improvements in Propellers, of which the following is a speci-Y l tication.

This invention relates to propellers and has vfor an object to provide a propeller that can be stamped from a single piece 'of springy sheet metal and bent at'two ends to form flukes; the said lukes being so ar` ranged that the water,- in operation ofthe propeller will be thrown outwardly away from the center of the propeller bladeto relieve the latter practicallyof all strain and resistance and allowing the blade to revolve with great rapidity or velocity.

Another object of the invention is top rovide a'l propeller wherein the central or bearing portion thereof will be of an equal diameter to that of the respective flukes.

Other objects and advantages will be apparent as the nature of the invention is better disclosed and it will be understood that changes can be made within the scope of the claims without departing from the spirit of the invention.

In the drawings forming a portion of this specification and inv which like numerals of referenceV indicate similar parts in the several vieWs:-Figure l is av plan view of a blank of sheet metal showing in dotted lines the manner of forming my improved propeller. Fig. 2 is an edge view of the blank from which the pro eller is formed. Fig. 3 is a side view o the propeller. Fig. 4v is a A perspective view of the propeller. l My improved propeller consists of a blank l which is of rectangular form and as shown the blade is of anequal width through-out the entire length of the blank. The blank is bent on a longitudinal line throughout lthe longitudinal area of the same and at each end one corner of the said blank is bent outf wa-rdly on a line approximately 45o to the central portion of said blank. In this manner of bending the blank it will be seen lthat a substantially spiral fluke 2 is provided at` leach. end, one fluke extending in an opposite direction to the other. The propeller after being thus formed receives a bearing member?, in which is mounted one end of the propeller shaft 4.

- cident to the fact that the ukes are of spiral form and are larranged to lie' at an opposite angle to each other they will in operation- PatentedMay 17, 1910.A

of the propeller throw the water -rom the center toward the outer extremity of the lukes,ithus relieving the central portion of the propeller of any strain and allowing the same to revolve with great rapidity or velocity. l

1. A propeller formed from a single blank of springyv sheet metal whose transverse'area is the same throughout its entire length,

vof springy sheet metal whose 'thickness is the same throughout, the width ofthe said blank being the same throughout the entire transverse area and spiral vflukes at the ends of said blank.

In testimony whereof I'alix my signa-I ture in presence of two witnesses.

' MANSEIELE oooxsEY.

Witnesses: I I

JOHN L. FLETCHER, JAMES A. KOEHL.

said blank being curved `throughout its lon-

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