US1281642A - Propeller. - Google Patents

Description

E. OHANLON.

PROPELLER.

APPLICATION FILED JAN. 7. um;v

Patented Oct. 15, 1918.

E. U H an'L u 11.

atto'nmzv- EDWARD OI-IANLON, 0F DAVENPORT, IOWA.

PROPELLER.

Specification of Letters Patent. Patented Oct, 15, 1918.

Application filed January 7, 1918. Serial No. 210,709.

To all whom it may concern:

Be it known that I, EDWARD OHANLON, a citizen of the United States, and resident of Davenport, in the county of Scott and State of Iowa, have invented a new and useful Propeller, of which the following is a specification.

The present invention relates to propellers for boats, and relates more particularly to a propeller of the reciprocating type.

' The object of this invention is to provide a propeller which comprises. a relatively simple and compact structure embodying few parts which admit of strength in their formation and which may be readily assembled; av propeller which may be easily reciprotated by hand; a propeller which is provided with an automatically adjustable lade adapted to be swung into an operative position for ofl'ering resistance to the impact of water thereagainst not only by virtue of the mounting of the blade, but also by an inherent buoyancy tending to raise the blade; and to provide a propeller with a blade and mechanical actuating means for urging the same into a position to offer resistance to the water upon the impact stroke of the propeller.

The above, and various other advantages and objects of this invention will be in part described and in part understood from the following detailed description of the presentpreferred embodiment, the same being illustrated in the accompanying drawing, wherein:

Figure 1 is a side elevation of a boat having a propeller constructed according to the present invention applied thereto.

Fig. 2 is a detail front elevation of the propeller, enlarged, the same being in position to offer resistance to the fluid medium.

Fig. 3 is a longitudinal section taken through the same substantially on the plane indicated by the line 33 in Fig. 2.

Fig. 4: is a similar view showing the blade in lowered position for decreasing the impact of the propeller upon its idle stroke.

Fig. 5 is a detail fragmentary elevation of the upper end of the propeller, showing one manner of mounting the same.

Fig. 6 is a longitudinal section taken substantially on the line 66 of Fig. 5, showing a modified form of tension means for urging the blade into operative position.

Referring to this drawing A designates a boat or water craft of any suitable construcried upon a beam 11. Intermediate the ends of the arm 12, the latter has a handle 16 adapted to be grasped by the hand for swinging the arm 12 upon its upper pivoted end as a center to oscillate the blad'elS.

A T-head 17 is carried upon the lower end of the arm 12 and provided with a transverse bolt or trunnions 18 adapted to pass through eyes 19 outstanding in spaced relation from the. upper or forward side of the blade 13. Nuts 20 or the like are secured onthe opposite ends of the trunnions 18 for retaining the blade 13 upon the lower end of the arm 12. The blade 13 is adapted'to swing down at substantially right angles to the longitudinal axis of the arm 12, as shown in Fig. 1, to reduce the resistance of the propeller in traveling through the water during the idle stroke, or during the movement of the propeller into a position to obtain a purchase upon the fluid medium.

The blade 13 is relatively wide and long and is provided in its upper or forward face with a relatively deep concavity extending throughout the major portion of the blade and into which a body of cork 21 or other suitable buoyant material is placed for the purpose of normally urging the blade 13 to swing up into operativeposition.

To augment the action of the buoyant material 21, a spring 22 may be interposed between an arm 23 on the lower end of the arm 12 and a connection or arm 24 on the forward end of the blade 13, the arm 24 being curved upwardly from the blade and adapted to register beneath the arm 23 when the blade is lowered. The spring 22 is secured at opposite ends to the arms 23 and 24 and is adapted to normally urge the arm 24 down and raise the blade 13 against the rear side of the arm 12.

The modification shown in Figs. 5 and 6 shows a downwardly flaring socket 25 in the form of a sleeve through which slidably engages a rod 26 provided on its upper end I tion of the strain. The eyes 19 are spaced with a weight 27 and a foot 28 upon its lower end adapted to bear against the upper face of the blade 13 forwardly of the pivot 18 to urge the rear end of the blade upward. The socket 25 is flared downward to admit the oscillation of the rod 26 as the foot 28 rocks upon the forward end of the blade as the latter swings up and down.

In operation, the arm 12 is swung forward at its lower end and the resistance of the fluid medium against the blade 13 swings the latter' down into a horizontal position to reduce the resistance of the propeller to forward movement.

As soon as the propeller reaches the end of its forward stroke, the buoyancy of the propeller together with the lifting means, such as the spring 22 or the weight 27, urges the blade to immediately rise against the rear side of the arm 12, the latter serving as a brace to support the blade and relieve the hinge 18 thereof from the greater porapart upon the blade to effectively hold it from swaying or bending laterally. The lower end of the arm 12 is now drawn back and the resistance of the relatively large surface area of thevblade 13 is brought into full contact with the fluid medium to offer considerable resistance to movement and thus transmit a counter force through the arm 12 to the frame 10 and the craft A.

It is of course understood that various changes and modificationsmay be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications beingrestricted only by the scope of the following claims. What is claimed is:

1. In a propeller, the combination with a boat, of a frame rigidly attached to the boat and rising therefrom, a pair of arms having their upper ends bent inwardly and pivotally connected to said frame, handles attached to and extending inwardly from said arms intermediate their ends, blades pivotally connected to the lower ends of said arms to form a transverse pivot and adapted to swing against the rear side of the arms upon the impact stroke of the propeller and further adapted to swing down into a substantially horizontal position upon the forward stroke of the propeller and means for assisting in urging said blades against the rear sides of the arms upon th impact stroke of the propeller.

2. In a propeller, the combination, with a boat, of a frame rigidly attachedto the boat and rising therefrom, an arm having its upper end pivotally connected to the frame, a blade pivotally connected to thelower end of said arm, an arcuate plate carried by said blade and curving over its pivot, brackets carried by said arm, and an expansion spiral spring positioned between said brackets. and arm for assisting in urging said blade againstthe rear side of the. arm upon the impact stroke of the propeller.

3. In a propeller, the combination with a boat, of a frame rigidly ttached to the boat and rising therefrom, a pair of armshaving their upper ends bent inwardly and pivotally connectedto said frame, handles attached to and extending inwardly from said arms intermediate their ends, blades pivotally connected to the lower ends of said arms to form a transverse pivot andadapt ed, to swing against the rear side of the arms upon the impact stroke of the propeller and adapted to swing down into a substantially horizontal position upon the for.- ward stroke of the propeller, arcuate plates carried by said blades and curving over their pivots, brackets carried by said arms, and expansion spiral springs positioned between said brackets and arms for assisting in urging said blades against the rear sides of the arms upon the impact stroke of the propeller. a

EDWARD OHAN LON.

Copies of. this patent may be obtained for five cents each, by addressing the FGommissioner of Patents,

Washington, D. G.

Images