US866365A - Propeller. - Google Patents

Description

PATENTED SEPT. 17, 1907.

7. o 96 1 u N Ouml SEM. KLD GLB AEM Jr WRW VPN G M I L P P A GEORGE ,W. JACKSON, .OF PHILADELPHIA, PENNSYLVANIA.

- PROPELLER.

Specification of Letters Patent.

i Patented Sept. 17, 1907.

Application i'iled January 31,1907. Serial N0- 355,006-

To all whom, 'it 'may concern:

De it known rthat I, GEORGE W. JACKSON, a citizen of the VUnited States, residing in the city and county of Philadell'ihia, State el Pennsylvania, have invented a new and useful Improvement, in Propellers, of which the following is a specification.

My invention consists. .of an improvement in propellers, whereby the number of blades may be varied and set in different positions or spaces apart, and means are provided for securing the blades to the hub in a firm and reliable manner. i I

lt also consists of details of construction as will be hereinafter set forth and pointed out in the claims.

Figure 1 represents a perspective view of a propeller embodying'my-invention. Fig. 2 represents a central longitudinal section thereof. Fig. 3 represents a face View of one of the blades detached. Fig. 4 represents a perspective view of the hub of the propeller.

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings: A designates a propeller sl1aft,`and B designates the hub ofthe propeller mounted thereon. p A

C. designates the blades of the propeller, the .same in the present case being three in number, of any suitable construction, excepting that .the hub portions D of the bladesl have series of matched openings E arranged in circular form around the central opening or bore E, which latter receives said shaftA.

The hub B consists of the collar F and neck G, and is separate from the blades, said collar and neck having a bore to receive the propeller shaft. In the collar F are openings H which extend in the longitudinal direction of the same, and to the same are secured the .pins or studs .T which project rearwardly therefrom parallelwith said openings.

K designates screws or bolts, which are passed i through openings H in the hub, and corresponding openings E in the blades, it being noticed that the pins or studs J pass through other openings in said hub.

On the rear ends of the bolts K, are the nuts L 'which are adapted to tighten against the hub portion of the adjacent blade, it being noticed that the several hub portions of the blades are placed one on the other. on the shaft and against the hub member and clamped together so that' they are firmly Iconnected with the hub B as one. The nuts and adjacent ends of the bolts are inclosed by the cap`M, which is ttedon the end of the shaft A and covers said parts, its inner face being somewhat recessed for. that purpose, said cap in the present case being secured in position on the shaft by the key N which is inserted in the shaft or fastened in any other suitable manner.

It will be noticed that when the cap is removed and the nuts L are unscrewed, the blades may be tted on the hub, it being seen that certain openings E of the hub portions D of the blades receive corresponding pins or studs J it being evident that the number of blades and their distances apart, or positions relatively to each other may be varied as desired. It will be noticed also that the bolts K extend parallel with the 'studs J, and consequently with the openings H and E, thus avoiding the piercing of the peripheries of the hub portions D of the blades to receive securing bolts, which otherwise would weaken said peripheries and provide projections thereon.

When a plurality of blades are employed, they are properly spaced apart and their hub portions placed one on the other on the shaft and against the hub mem- -ber as has been stated, the relative openings thereof receiving the pins or studs I. Then the bolts K are passed through the openings H of the collar F and the other openings E of the hub portions D. The nuts L are then applied to the bolts and tightened thereon, whereby the blades are firmly connected with the hub and prevented from displacement in either longitudinal or rotary directions. The cap M is also placed in position, .whereby the nuts L are inclosed and concealed While I have specified certain means for carrying out my improvements, I do not wish to be limited exactly to the same, but desire to make such changes as may come within the scope'of the novelty involved,

as for instance, two bladesmay be connected as one and having asingle hub portion which'is provided with a central opening to receivethe propeller shaft, and a series of openings around the same for the purposes of connection with the shaft, the same as shown in the single blade, Fig. 3.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:-y

1. In a propeller, a blade having a hub portion, a hubmelnber which is separate from said portion, said member and portion having each a central bore to receive a propeller shaft, and a lseries of openings surrounding said central bore, and separate devices for adjusting and securing the blades on said member, said devices extending parallel through said portion and member.

2. In a propeller, a plurality of blades,V each having a.' hub portion, a'hub member from which the hub portions are separate, means on said portions and member for adjusting the blades, and`separate means on saidportions and member for clamping the same,vv said means being respectively parallel said hub member'and the hub portions of the blades havingeach a bore to receive a propeller shaft.

3. In a propeller, a plurality of, blades, a hub member and fastening devices, said blades being separable from said member and provided in their hub portions'wthv openings, and openings to receive said fastening devices,

which are also adapted to enter other openings ot said matched openings', projections on said hub member adapted to `receive a respective number of the openings of said hub portions, fastening devices adapted to pass through,

said hub member and other openings in the hub portion, and means for tightening said devices.

5. ln a propeller, a blade, and a hub member, said blade being separable from said member, a bolt passed through said member and the hub portion of said blade, a tightening device on said bolt, and a closure for saidhub portion over the end of the tightening device thereat.

, 6. In a propeller, a blade, and a hub member, said blade bcingseparate from said member, a securing bolt passing through said member and hub portion of said blade, a nut on said bolt, and a closure over said nut and adjacent end of the bolt, the same being adapted to be secured to the shaft of the propeller. v

7. In a propeller,' a blade having a hub portion, a hub member, which is separate from said portion, said member and portion having' central bores respectively to receive a propeller shaft, and openings betwcen'said bores and the peripheries of said parts, a stud projecting from the side o'f said hub member adapted to enter an opening in the hub portion,. and a bolt adapted to be passed through another opening in said portion, said stud and bolt being adapted to extend in the direction of the length of the propeller shaft.

8. ln a propeller shaft, a plurality of blades, each having a hub portion, a hub member which is separate from said portion, said portion and member having bores therein to receive a propeller shaft, and having a plurality of openings around said bore, a stud projecting from said member adapted to enter one of the openings of said hub portion,

and a bolt adapted to pass through another opening of said hub portion, and a corresponding opening'in the hub member, and means for tightening said bolts, said openings, stud and bolt extending in the direction of the length of the propeller shaft.

GEORGE W. JACKSON. Witnesses l' JOHN A. wmoi-msnmiu, HARRY C.' DAL'roN.

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