US1675422A - Boat - Google Patents

Description

July 3, 1928.

G. B. POST BOAT Filed Oct. 25, 1926 2 Sheets-Sheet July 3, 1928.

G. B. POST BOAT Filed Oct. 25, 1926 2 Sheets-Sheet 2 v Patented July 3, 1928.

N' E STATES.

1,675,422 PATENT OFFICE.

GEORGE B. rosr, or'maw YORK, N. Y.

My invention relates to boatsand in particular to a boat driven by an air propeller.

provide in a marinevessel a combined air and water rudder soarranged that below a predetermined speed the water rudder will control the movements of the boat, and above .a predetermined speed the water rudder will be rendered inoperative and the air rudder will become fully operative.

It is a further object to provide such a combination of rudders which will be auto mati'cally operated according to the speed of the vessel and the quantity of air passing by the air rudder.

It is a furtlier object to provide a novel form of mounting and protecting the motor and propeller and of locating the power plant with respect tothe boat structure and the rudder. i 7

Referring to the drawings:

Figure 1 is a side elevation of the complete installation with the water rudder 1n lowered position; i i

FigureQ is a detail view in elevation of the rudders with the water rudder lowered as it will be when either in operative position or during the period in which the boat is controlled by the water rudder;

Figure 3 is a similar view toFigure 2 showing the Water rudder in its elevated and in operative position when the air rudder is steering the boat;

Figure 4 is a plan view of the rudders and the control vanes for the water rudder;

Figure 5 is a perspective of the bottom of the hull of the boat;

Figure 6 is a diagrammatic perspective showing the detail nature of the propeller guard so arranged as to protect the passengers but not to interfere with the slip stream from the propeller,while protecting the propeller.

Referring to the drawings in detail, a boat hull isprovided which may be of any suitable character, preferably of the hydroplane type, although my invention is not so limited. In the particular embodiment of the hull illustrated in the present application, it will be observed that I provide hot- Application filed October 2 5, 1926. Serial No. 143,949.

tom surfaces 1, which terminate rearwardly in a step 2 and an elevated stern section 3. A keel 4 is provided.

The bottom portions 1 terminate laterally on the chine line 5. The bottom of the boat is substantially flat having impartedto it a slightly concave arcuate section, which becomes of gradually decreasing concavity from how to step line.

VVhen proceeding up to about tenmiles an hour, the boat proceeds with most of the hull in the water but at higher speeds the bow lifts and the boat rests upon the rear quarter. It is above this speed of 10 miles an hour that the water rudder lifts, and the slip stream from the propeller is sufficient to give full control by the air rudder.

Mounted upon the hull aft of the midships of theboat is a motor of any suitable type, generally designated 6. It is provided for itssupport with a pair of diverging, forwardly-disposed engine struts 7, a pair of laterallydisposed, downwardly and rearwardly extending struts 8 and a pair of downwardly-extending, transversely-disposed struts 9; It is braced laterally with crossed wires in the plane of the struts 7 and 8. The struts 7 do not extend to the gunwale of the boat. The lower ends of the struts 9 and 8 extend to the deck inside the gunwale, the lower ends of such struts 8 and 9 terminating at a common point on the after deck.

to provide for the free revolution of the pro peller 10within its cage. This cage or guard consists of transverse ovoid sections of netting, designated 11, placed between the propeller and the bow of the boat. These sections are providedwith transverse braces 12. Aninterconnecting section below the motor, designated 13, is provided. 7

On either margin of the ovoid, transverse guard sections, are semi-circular sections for guarding the ends of the propeller, designated 14, provided with suitable braces 15. The deck 16 of theboat is lowered below the gunwales 17 'in order to quickly carry away any accumulation of water from the spray by holes 17 and to protect the propeller. v

The sides of the boat adjacent the propellet may be protected by canvasguards 18 to prevent any water from coming in contact with the propeller through the operation of the boat.

Turning to the next feature of this invention, the rudders, it will be obsery ed that I provide on the stern of the'boat a ver-' tical rudder post 19 suitably braced by the diagonal braces 2 Pivoted on this rudder post is an air rudder 21. Pivotally connected to the post and to the air rudder is a water rudder 22. i i

A tiller yoke 23 operated by the tiller ropes Q-i-l is provided for the purpose of moving theair and water rudders, as a'unit on the rudder post 19.

Connected to the tiller ropes 24L is the usual steering wheel 25. Any form of control of these rudders may be provided as well known in marine practice. v

The water rudder 22 has pivotally iconnested thereto at 26a link 27 which extends upwardly within the a'ii' rudder projecting out: atthe top thereof where is pivotally connected at 28 to an arm 29pivoted at 30 toa bracket 31 on top of the rudder post 19. This arm 29 is rigidly connected to a pair of arms disposed atan angle thereto designated'32 on the ends of which are mounted vanes'33 which are disposed at an angle to the line of movement of the boat. It will be apparent that, when the boat first starts to operate, it will move forwardly under the control of the water rudder but when the slip stream becomes'of sutlicient force from the air propeller the vanes 83 will be lifted from their position shown in Figure 2 to that position shown in Figure 3. The water rudder will be thereby lifted from the water and "the boat will be steered by the air rudder. Therefore, when the speed becomes great, as this boat is capable of from thirty to forty miles an hour, in the particular em bodiment illustrated herein, the boat will not be impeded in its speed by'a water rudder nor will its draft be increased by the water rudder. Consequently, in a boat of twenty three feet six inches long with a beam of seven feet three inches the draft will be nine inches'when at rest but only three to four inches when planing at a speed of about ten miles an hour. \Vhen using a ninety horse power motor, I find that the water rudder will be elevated and the boat will be satisfactorily, completely steered by the air rudder.

It will be understood that I desire to com prehend within my invention such modifications as'may' be necessary to adapt it to varying conditions and uses.

Having thus fully described my invention, what I claim as new andde'sire to secure by Letters Patent, is: ii

1. In combination in a boat, for steering 'a boat, anair rudder, a'wa'ter rudder, and

nieansautomatically operated to render the water rudder inoperative.

. 2.-In combination in a. boat, an ,air rud- .der, a water rudder, means for moving said rudders for steering purposes as a unit, and air controlled means for rendering said Water rudder inoperative when a predetermined amount of air passes by said rudders.

3. In combination in a boat of a rudder post, air and water rudders mounted thereon, means to move said rudders thereon, vane means adapted tobe operated upon by the fair connected to said water rudder adapted to move the water rudder out ofthe Water upon a predetermined amount of air engaging with said vane means.

4. In combination in a boat, a supporting rudder post, air and water rudders mounted thereon adapted to turn thereon as. a unit, means to control said rudders, a link connectcd to said water rudder, a lever system supported on said rudder postturning with said rudders; vanes carried byv said lever system, said lever system being connected to said link whereby the passage of air will elevate said varies and lift said water rudder.

5. In aboat, a common supporting means, an air rudder and a water'rudder pivoted on said means one above the other, said water rudder being adapted to move relative to said air rudder, a link passing through said air rudder connected to said water rudder, vanes connected to said link'on either side of said air rudder adapted when elevated by the air to lift said water'rndder.

6. Ina boat, a eonnnonsupporting means, an air rudder and a water rudder *pivoted on said means one above the other, saidwater rudder beingadapted to move relative to said air rudder, alink passing through said air rudder connected to said water rudder, vanes connected'to said link oneithe'r sideofsaid air rudder adapted when elevatedxby the. air to lift said water rudder, 'saidconne'cting means for said vanes consisting. ofa .yoke.

7. In a boat, an air propeller, an air rud "said water rudder inoperative upon a predetermined air blast from the propeller being achieved, and a common steering means ffor said rudders. i i i 9. In a boat, a boat body, a power plant and air propeller mounted thereon, an air rudder mounted in the slipstream from said propeller, a water rudder, vanes 'inoun'ted in said slipstream connected to said Waterrud- 'der whereby upon the achievement of a 'predetermind speed, said vanes will inov 5' to render said water rudder-"inoperative and steering means for said rudders.

' 103111 a boat, aboat body, a ower plant above said body 'aft of the mid ldps'ofithe boat, a pro eller connected to said ower plant, a ru der post on the stern 0 said boat, a relatively large air rudder mounted thereon in the slipstream from the propeller, ;a relatively small water rudder mounted therebeneath, air vanes connected to said water rudder mounted on said rudder posts adapted to elevate the water rudder when a suflicient blast from the propeller is delivered against them, and a common steering means for said rudders.

11. In a boat, a boat body, a power plant above said body aft of the midships of the boat, a propeller connected to said power plant, a rudder post on the stern of said boat, a relatively large air rudder mounted thereon in the slipstream from the propeller, a relatively small Water rudder mounted therebeneath, air vanes connected to said Water rudder mounted on said rudder posts adapted to elevate the Water rudder when a sufiicient blast from the propeller is delivered against them, and a common steering means for said rudders, and a guard for said propeller.

12. In a boat, a boat body, a power plant above said body aft of the midships of the boat, a pro eller connected to said power plant, a rud er post on the stern of said boat, a relatively large air rudder mounted thereon in the slipstream from the propeller, a rela tively small Water rudder mounted therebeneath, air vanes connected to said water ruddermounted on said rudder posts adapted to elevate the water rudder when a sufiicient blast from the propeller is delivered against them, and a common steering means for said rudders, and a guard for said propeller, said uard being arranged forwardly and latera ly of said propeller in such a manner as not to interfere with the slipstream therefrom.

13. In combination, a hydroplane boat body, an air rudder, a water rudder, steering means therefor, air controlled means for rendering said Water rudder inoperative upon a predetermined speed being achieved by said boat, a power plant and an air propeller so arranged as to deliver its slipstream to said air rudder, and means for controlling the Water rudder.

In testimony whereof I afiix my signature.

GEORGE B. POST.

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