US35219A - Improvement in adjustable reversible propellers - Google Patents

Description

UNITED STATES PATENT OEEICE.

AARON B. COOLEY, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENTIN ADJUSTABLE REVERSIBL PROPELLERS.

Specification forming part of Letters Patent No. 35,219, dated May 13, 1862.

To @ZZ whom it may concern: l1. This ring F tits snugly, but so as to slide 13e 1t known that I, AARON B. COOLEY, of freely on the outside of the casing, in which, Philadelphia, Pennsylvania, have inventedr as well as in the annular projection d, are an Improvement 1n Adjustable Propellers; formed openings for the free movement of and I do hereby declare the following to be a i the projections i' and t" and links E and E. full, clear, and exact description of the same, On the outside of the ring F is eut a recess reference being had to the accompanying i for the reception of the ring .I which is made drawings, and to the letters of reference of two pieces bolted together at y' and conmarked thereon. I

My invention consists of a screw-propeller forked end of the lever N, which has its fulconstructed and operating as described herecrum on a pin passing through a bracket, u, inafter, so that the blades may be reversed, secured to the stern-post or to the stationary thereby rendering the propeller a portion of bearing B.

a left-handed or a portionof a right-handed The casing D, two bla-des II and H', arms screw at pleasure, without interfering with G and G', links E and E', and the ring F, the mot-ion ot' the propeller-shaft. with its projections, revolve with the propel- In order to enable others to make and use ler-shaft O, while the ring J has no other my invention, I will now proceed to describe movement than that which may be imparted nected by the two links M and M to the its construction and operation. to it by means of the forked lever N.

On reference to the accompanying' draw Then the ring F has been pushed to the ings, which form a part ot' this specification, limit of its movement in the direction of the Figure l is a side view of my improved adarrow, the blade H. will have assumed the pojustable and reversible propeller; Fig. 2, an sition illustrated by the line and the blade end view, partly in section; and Fig. 3, a sech the position shown by the line y. Then tional view. the ring F, however, has been moved to its Similarletters referto similar parts throughfull extent in the direct-ion contrary to that out the several views. pointed out by the arrow, the blade repre- The line A represents the outside of the sented by the line '.r will assume the position stern-post of the vessel, to which is secured shown bythe line 1] and thelatter the position the bearing B for the projecting end of the shown by the line It will thus be seen propeller-shaft (l. that by the movement of the lever N the di- D is a hollow cylindrical casing with a rection of the blades may be instantly rerounded outer end, and in the interior of this versed, so as to convert the propeller formed casing and forming part of the same is the by the blades from a right-handed to a leftannular projection d, to which the project` handed screw, thereby allowing the attending end ot' the propeller-shaft C is firmly se ant to change the direction of the vessel withcured. From the inside of the casing and out interfering` with the continuous rotation near the rounded end of the same projects of the propeller-shaft in one direction. the two hubs e and e', one being situated di- My invention is especially applicable to rectly opposite the other, and into the hub e propeller vessels of smaller size-such as are the stem h of the blade H fits snugly, but so used on canals-as it obviates the necessity of as to turn freely, the stem h of the bla-de H close attendance to the revolving gear of the fitting into the opposite hub, e. Each blade engine. consists of a simple iiat pla-te of cast-iron, Another important object of my invention malleable iron, or brass, the stem either formis the facility with which the blades of the ing a part of or being firmly secured to the propeller can be adjusted so as to present a plate. coarser or finer threaded screw at pleasure, To the stem 72 of the blade Il is secured an which adjustment will depend upon thejudg arm, G, and to the stem t of the blade H is ment of the attendant, who will be guided by secured a similar arm, G', the latterbeing conthe increased or diminished loading of the neeted to a projection, i, on the ring F by a vessel and the extent of duty to be aecomlink, E, while the arm G is connected by a plished by the engine and propeller.

link, E', to a projection, i', on the same ring, Although I have shown the ring F as arranged lfor being operated by a lever, N, it will be evident that it may be moved haek- Ward and forward over the easing D byraeks and pinions and other appliances which will readily suggest themselves to experienced engineers.

I wish it to be understood that I do not desire to Claim, broadly, a propeller the blades of which can be adjusted to different angles; but

I claim as my invention and as an improvement in that class of propelle'rs-v The blades H and I'I, arms G and G ,links E and E the'sliding` ring F, and ring J, when d the whole of the above parts are arranged on the hollow hub or easing D for joint action, as set forth, and when the said ring J is operated by the links M and M and lever N, or their equivalents, as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

AARON B. COOLEY.

IVitnesses:

HENRY HoWsoN JOHN WHITE.

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