US657054A - Propelling mechanism for boats. - Google Patents

Description

Patented Aug. 28, I900.

0. H. BLOMSTRUM PROPELLING MECHANISM'FOR BOATS.

(Application filed Jan. 27, 1900.)

(No Model.)

lasJl WASHINGYON u o Unrrnn STATES PATENT OFFICE.

CARL H. BLOMSTROM, OF MARQUETTE, MICHIGAN, ASSIGNOR TO THE LAKE SHORE ENGINE WORKS, OF SAME PLACE.

PROPELLING MECHANISM FOR BOATS.

SPECIFICATION forming part of Letters Patent No. 657,054, dated August 28, 1900. Application filed January 27, 1900- Serial No. 2,933. (No model.)

To all whom it may concern:

Be it known that I, CARL H. BLOMSTROM, a resident of the city and county of Marquette, State of Michigan, have invented certain new and useful Improvements in Propeller Mechanism for Boats, of which the following is a full, clear, and exact description.

v This invention relates more particularly to that class of mechanism for propelling boats in which the propeller wheel or screw is provided with blades that may be shifted with respect to the body or hub of the wheel so that by varying the angle of the blades the boat can be caused to move either in a forward or backward direction or can be held against movement in either direction.

The object of the invention is to improve the construction of the propeller-wheel and the means whereby the blades are shifted; and this object is accomplished by the novel features of construction hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the claims at the end of this specification.

Figure 1 is a view, partly in longitudinal section and partly in side elevation, of the propelling mechanism embodying the invention. Fig. 2 is a view in horizontal section through the hub of the wheel and the retaining-sleeve, the outer end of the shaft and the cranks of one of the blades being shown in side elevation. Fig. 3 is an end View with the cap of the wheel-hub removed, the blades being partially broken away. Fig. 4 is a view in central cross-section through the inner ends of the propeller-blades, parts being shown in elevation. Fig. 5 is a view in vertical crosssection on line 5 5 of Fig. 1. Fig. 6 is a detail perspective view of one of the propellerblades.

The shaft A, whereby the propeller-wheel will be driven, is suitably sustained in an outboard-bearing B, the body I) of which Will be of a shape to conform to the hull of the boat to which it will be attached. The outer cylindrical sleeve of the bearing B is shown as screw-threaded, as at Z), and with this screwthreaded sleeve engages a correspondinglythreaded sleeve or gland O, the purpose of which is to retain against longitudinal movement the hub of the propeller-wheel, as will presently more fully appear. gland O is preferably formed with a concave recess at its end to receive suitable packing, and a similar recess is also preferably formed at the outer end of the sleeve of the bearing B. The sleeve 0 has formed in piece therewith or suitably connected thereto one of the sections 0 of a bearing that receives the revoluble hub D of the propeller-wheel, the other section 0 of this bearing being bolted, as at 0 to the section 0. (See Fig. 5.) The sections 0 c of the bearing are recessed, as at 0 to receive an annular flange d at the inner end of the hub D, this flange serving to hold the hub againstlongitudinal movement. The outer end of the hub D is formed with bearings to receive the stems or journals e of the propeller-blades E, and these journals are held in place by a cap D, that is bolted, as at d, to the hub D. The chambered outer portion of the hub D serves to receive the cranks e, that are fixed to the stems e of the propeller-blades E, and each of the cranks e is provided with a wrist-pin e extending inwardly, as clearly shown in Figs. 1, 4t, and 6 of the drawings. WVith the wrist-pins (2 engages a plate or extension F, projecting from the outer end of the shaft A, and preferably set within a recess of the shaft and secured thereto, as at f. The plate or extension F is formed with slots f, that receive the wristpins 6 and preferably also the plate F is formed with a longitudinal slot f to receive a pin g, that extends between the stems c of the propeller-blades, the ends of this pin setting within holes or seats 6 in the stems. (See Fig. 4.) Upon the interior of the hub D are formed grooves d, that receive the edges of the plate F, thereby causing the hub D of the propeller-wheel to revolve in unison with the shaft A, while permitting the shaft to move longitudinally with respect to the hub.

From the foregoing description it will be seen that when the shaft A is shifted longitudinally a corresponding movement will be imparted through the wrist-pins c to the cranks e of the propeller-blades E, and by this means the angles of the blades can be varied in order to cause the blades to effect either the forward or backward movement of the boat, or if the blades be turned so that The sleeve or they extend in the plane of revolution of the wheel then the boat will be held against movement in forward or backward direction.

In order to enable the propeller-shaftA to be moved longitudinally in order to effect the desired shift of the propellerblades, I prefer to provide this shaft with a collar a, having an annular groove therein to receive a ring a, this ring being furnished with laterally-projecting pins (6 with 'which will engage the yoke-shaped endof the shifter bar or lever A. The inner end of the propellershaft is shown as provided with a gear-wheel A by which revolution will be imparted to the shaft, although it will be understood that the shaft may be revolved by any convenient means. I

It is manifest that the precise detailsof construction above set out may be varied by the skilled mechanic without departing from the spirit of the invention.

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

1. Propeller mechanism for boats comprising a revoluble hub and a bearing for h'olding it against longitudinal movement, propeller-blades journaled in said hub and provided at their inner ends with cranks, a propeller-shaft provided at its outer end with a plate or extension keyed to said hub but 1011- git udin-ally movable with respect thereto, said extension being also connected to the cranks of the propeller-blades whereby said blades may be shifted.

2. Propeller mechanism forboats comprising propeller-blades provided at their inner ends with stems or journals and with cranks, a revoluble hub wherein said blades are journaled,said hub havinga removable cap for holding said journals in place, a longitudinally-movable shaft connected to the cranks of said blades and keyed to said hub butlongitudinally movable with respect thereto, and a bearing wherein said hub is revolubly mounted and whereby it is held against longitudinal movement.

' 3. Propeller mechanism for boats comprising'propell'er-blades provided at their inner ends with stems or journals and with cranks, a pin extending into and between the stems of the propel1er-blades,alon gitudinally-movable shaft provided at its outer end with an extension having a slot through which said pin passes, said extension being connected with the cranks of the propeller-blades and a hub wherein said propeller-blades are journaled and a suitable bearing for said hub.

I CARL H. BLOMSTROM. Witnesses:

FRED H. BEGOLE, J. FRED KERN.

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