US135555A

US135555A - Improvement in propellers for vessels

Info

Publication number: US135555A
Authority: US
Publication date: 1873-02-04
Anticipated expiration: 1890-02-04

Description

E. C. HUjBBAR D.

Propellers for Vessels.

. Patented Feb. 4,1873.

` To Il 'whom it may concern:

urrED STATES ERWIN C. HUBBARD, OF GREEN BAY, WISCONSIN.

IMPRovl-:MENT IN PRoeELLERs Fou vEssELs.

Specification forming part of Letters Patent No. 135,555, dated February 4, 1873.

Be it known that 1, lanwIN C. HUBBARD, of Green Bay, county ot Brown,\\"isconsin, have invented a new and Improved Wheel t'or lropelling Vessels, of which the ibllon-'ing is a specin'eation:

This invention relates to that class of improvements whiclrhave for their object the propulsion ot' vessels when driven b vsteani or other motive power; and consists in a new i'orm ot' shat'ts and blades, as will hereinafter be more fully described.

Figure l is a rear-end view of the wheel. Fig. 2 is alongitudinal section. Fig. 3 is a 4sectional detached view ot' the hub.

rlhe devices forming the wheel are the shaft F, the conical hub E, the blades A, and arms B. The shat't F is inclosed in a sleeve, G. The conical hub E has curved serrated seats j', to which are attached the curved and taperinp'blades A, tbrming a conical-shaped wheel with apertures or openings,as shown at a.. rlhe sleeve may be made hollow, and, t'or the purpose ot' expelling the water more rapidly from the center ot the wheel, is made tapering or larger at the end next the hub. B are stays or supports t'or the outer ends ot the blades, and are fastened at one end to the sleeve, and the other end passes through the blades, ith thread and nuts atreither side, for the purpose ot' supporting the blades, and also to adjust the size ot' the openings between them.

1n the drawing,t`our blades are shown. The number of blades is not material. There may be more or less, in proportion to the size ot' the wheel. '.lhe devices for regulating the spa-ce between the blades is important, inasmuch as the size ot' the openings gives the wheel morelor less lead. Theserra'ted seats upon the inner end ot the hub, and upon which the small ends of the blades are fastened, are for the purpose otl forming the openings at the small end ot' the wheel. The wheel may be placed at the stern, at the sides, or under the vessel` and the propellingpower may be applied to it in the ordinary way.

The advantage ot this peculiar construction is that its force is centripetal, and it vields a vastlyincreased amount of speed to the power applied.

1n its practical operation the wheel receives the water through the apertures or openings between the blades. As the wheel revolves there is a constant pressure upon the whole ot' the inner surt'ace ot' the. blaues, and the expulsion ot' the water forms apower ot resistance in proportion to the velocity ot' the revolutions. lt diti'ers lt'rom the screw-propellerin the amount ot' surface acted upon by the water and in the amount ot' water displaced. This wheel is not designed to disturb or displace the water. On the contrary, the water is drawn into or clasped by the wheel, and when it is ejected therefrom it i'orms a powerful rcsisting torce. By its peculiar construction and form it not only presents a small amount of resisting surface, but it has all the advantages ot' strength and durability, and it may be applied with equal success \"vhen it is desirable to use submerged wheels as side plropellers.

Witnesses:

'120. BREou'r, M. H. DooLrrcrLE.