Title:
Speed control for outboard motorboats
United States Patent 2155112


Abstract:
This invention relates to outboard motors, and more particularly to an attachment for controlling the speed of a motor boat without changing the speed of the motor. S By means of the present invention, the operator of the motor boat is enabled to control the same from full speed ahead to about...



Inventors:
Anderson, Howard F.
Application Number:
US18176537A
Publication Date:
04/18/1939
Filing Date:
12/27/1937
Assignee:
Anderson, Howard F.
Primary Class:
Other Classes:
74/489, 114/145A, 114/166
International Classes:
B63H25/50
View Patent Images:



Description:

This invention relates to outboard motors, and more particularly to an attachment for controlling the speed of a motor boat without changing the speed of the motor.

S By means of the present invention, the operator of the motor boat is enabled to control the same from full speed ahead to about one-half speed reverse, an advantage which is very useful in approaching or leaving a wharf or mooring, or when trolling for fish at any desired speed.

One object of this invention is to provide a device of the above nature which may be readily Sapplied either to a new or any existing standard 16type of outboard motor.

Another object is to provide a speed control device of the above nature which may be readily actuated by means attached to the steering handie of the outboard motor.

Still another object is to provide a pair of oppositely curved :water-deflecting hinged plates embracing the .propeller and capable of being rocked toward and away from each other to vary the speed of the boat by suitable gear mecha2fa nism connected to the steering handle by a flexible cable. ' ser b A still further object is to provide a speed control device of the above nature which will be relatively simple in construction, inexpensive to 80 manufacture, readily installed and'manipulated, comnpact, ornamental in appearance, and very efficient and durable in use.

With these and other objects in view there has been illustrated in the accompanying drawings several forms in which the invention may be conveniently embodied in practice.

In the drawings: Fig. 1 is a side view of an outboard motor having the control mechanism embodying the features of this invention operatively associated therewith.

Pig. 2 is an enlarged vertical section taken through the steering handle and rockable .control grip.

SFig. 3 is an enlarged side view showing one of the curved speed controlling plates and adjacent motor parts.

Fig. 4 is a rear view of the parts shown in 0 Fig.. 3.

Fig. 5 is a top plan view of the same, with the top of the gear box removed to more clearly show the gear mechanism therein, the parts being shown in position for "full speed aheid". SFig. 6 is a view simillar to Fig. 5, showing the gear parts and plates in position for "half speed reverse".

Fig. 7 is a sectional view of a modified form of gear mechanism for actuating the speed controlling plates. a Mig. 8 is a top plan view of the same with the cover of the gear box removed.

Fig. 9 is a vertical sectional view of another modified form of gear mechanism for actuating the speed controlling plates. Fig. 10 is a top plan view of the same, with the cover of the gear box removed.

Referring now to the drawings wherein like reference characters designate like parts throughout the several views, the numeral 10 (Fig. 1) indicates an outboard motor having- the usual cylinder II, a gasoline tank 12, etc., all of which parts are arranged together as a unit, which is pivotally supported upon an upright propellershaft-enclosing tube 13 by means of a sleevelike member 14 secured to the motor 10 and resting -upon a shoulder 15 provided on a boat engaging clamp 16.

InĂ½ order to rotatively support a propeller 18, a bearing box 17 is secured to the lower end of the tube 13, and said propeller 18 is connected by means of bevel gears 20 and 21 to a vertical driving shaft 19, enclosed by the tube 13. The usual steering handle 22 extends forwardly from the outboard motor 10 to permit the operator who generally sits at the stern of the boat to swing the propeller laterally from left to right to steer the boat. The usual skeg 23 is also provided, extending downwardly from the bearing box 17, as well as the usual anti-cavitation plate 24 which extends rearwardly from the tube 13 above the propeller 18.

In order to deflect the water as it is thrown rearwardly by the propeller, provision is made of a pair of opposing plates 25 and 26 disposed one on either side of the propeller 18, said plates being convex outwardly aild adapted to control the speed of the' boat, as desired. The curved plates 25 and 26, when set in the position shown in Fig. 5, form a "tunnel" through which the water, forced rearwardly by the propeller, passes without deflection to cause the boat to be propelled forwardly at full speed. As the plates 25 and 26 are swung to bring their respective rear edges 27 and 28 toward each other, the rearwardly directed body, of water passing between the same is reduced in volume and that deflected forwardly by the plates Is increased, whereby the speed of the .boat will be progressively reduced. ,This reduction in. speed will continue 66 2 2,155 until a balance is obtained between the force of the volume of water passing rearwardly between the edges 27 and 28 and the force of the water deflected forwardly by the plates 25 and 26, whereupon the boat will stop, this being the "neutral" position (not shown). If the plates 25 and 26 are swung to the completely closed position, shown in Fig. 6, with the rear edges thereof in line to line contact, the force of the rearwardly moving water will be overbalanced by the force of the forwardly deflected water, causing the motion of the boat to be reversed, and the boat will run backwardly up to -approximately one-half of its maximum forward speed.

The plates 25 and 26 are pivoted at their lower ends upon a common pivot pin 29, and are individually pivoted at their upper ends upon a pair of separate pivot pins 30 and 31 respectively. The lower common pivot pin 29 is supported by a bracket. 32 secured to and extending rearwardly from the skeg 23, and the upper pivot pins 30 and 31 pass through the bottom wall 33 of a gear box 34 secured to the anticavitation plate 24. The upper pivot pins 30 and 31 are also secured within the gear box 34 to gear sectors 35 and 36 respectively, which sectors are intermeshed, whereby each plate will rotate the same amount and in unison with the other in opposite directions.

A small driving pinion gear 31 is rotatively mounted in the gear box 34 on a vertical axis with its teeth in mesh with the teeth of the gear sector 36. and said pinion gear 31 is rigidly mounted on the lower end of a flexible shaft 38 surrounded by a flexible metal tube 39 supported on the motor exhaust pipe 49 by clamps 39a. The shaft 38 extends upwardly and forwardly and passes through a lateral opening 40 in the handle 22 into a composition grip 41 0 tightly fitted upon a tube 42 which is rockably mounted upon a tubular portion 43 of the steering handle 22. The .forward upper end of the flexible shaft 38 is secured upon the closed front end 44 of the tube 42, as by a set screw 44a, 6 whereby it will be rotated when the grip is twisted.

In order to maintain the tube 42 upon the tubular end portion 43 of the handle 22, provision is made of a resilient hooked member 45 .o secured to the steering handle 22 and detachably engaging the front end of a ring 46, which is rotatively mounted upon a rear extension 47 of te tue he tube The ring 46 has an internal eccentric camming edge 48 in engagement with Sa the tube extension 41, and is operable to compress the same to vary the frictional contact between said extension 41 and the tubular portion 43 of the handle 22, thus preventing accidental turning of said grip 41, and the conseW0 quent twisting of the deflecting plates, due to the force of the water acting thereon when the motor is running.

In the modified form of the invention shown in Figs. 7 and 8, the plate 25 is secured to a 6 short sleeve 50 pivotally mounted upon a short shaft 51 secured to the plate 26. The shaft 51 extends upwardly through the sleeve 50 into a gear box 34a, and the upper end of said shaft 51 is secured to an externally toothed gear secTo tor 52, The sleeve 50 also extends into the gear box 34a and is secured to an internally toothed gear segment 53 concentric with the sector 52.

The respective teeth 54 and 55 of the gear members 52 and 53 are in opposed spaced apart relation and intermesh with the teeth of the pinion 31 disposed between them. In the operation of this form of the Invention, when the grip 41 is manually twisted, the rotation of the pinion gear 37 will swing the gear sector 52 and the segment 53 in opposite directions, causing the plates 25 and 26 to swing upon their axes for controlling the speed and direction of movement of the boat to which the outboard motor 10 is attached.

In the form of the invention shown in Figs. 9 and 10, the deflecting plates 25 and 26 are respectively secured upon the lower ends of an elongated sleeve 60 and an elongated shaft 61 surrounded by said sleeve. The sleeve 60 and the shaft 61 extend upwardly into an elevated gear box 62, and are secured, respectively, to bevel gear sectors 63 and 64 disposed therein.

The gear sectors 63 and 64 are disposed one above the other with their respective teeth 65 and 66 in opposed spaced-apart relation. A bevel gear pinion 61, secured to the end of the flexible shaft 38 is disposed between the opposed teeth 65 and 66 of the gear sectors 63 and 64 with its teeth 68 in mesh therewith. In the operation of this form of the invention, manual rotation of the grip 41 will cause swinging of the plates 25 and 26 through the action of the sleeve 60 and shaft 61, respectively. One advantage of this construction is that the gear box 62 is located above the water level, and will cause no drag or retarding action upon the motion of the boat. In order to support and steady the sleeve 60, a bracket 69 may be employed, which is secured to the anti-cavitation plate 24.

In the operation of all three forms of the invention herein disclosed, before starting the motor when the boat is at a wharf, the plates 25 and 26 will preferably be set at a neutral posi- 4 tion, previously ascertained, and determined by indicia (not shown) on a marked handle tube extension 47 and the adjacent tubular end portion 43. After the outboard motor 10 has been started, by properly twisting the handle grip 41, the plates 25 and 26 may be either closed or opened to cause the boat to travel either rearwardly or forwardly, and at any desired speed.

The use of the present invention in no way interferes with the steering action of the handle 22, 0 and the speed of the boat may be readily controlled from the steering handle over a wide range without changing the motor speed.

It will be understood that the present attachment may be operated to control the speed of 55 the boat at any time, either when the boat is already in motion or when starting up.

While there have been disclosed in this specification several forms in which the invention may be embodied, it is to be understood that 60 these forms are shown for the purposes of illustration only, and that the invention is not to be limited to the specific disclosures but may be modified and embodied in. various other forms without departing from its spirit. In short, the 65 invention includes all the modifications and embodiments coming within the scope of the following claims.

Having thus fully described the invention, what is claimed as new, and for which it is .de- 70 sired to secure Letters Patent, is: 1. In a speed control mechanism for a motor boat having an outboard motor provided with a propeller and an anticavitation plate, a pair of opposed curved plates mounted to swing on sub- 76 Operation stantiany vertical axes one on either side of said propeller, said plates having gears secured thereto, a gear-housing box secured to said anti-cavitation plate, a pinion drivingly cong nected with said gears, a flexible shaft drivingly connected with said pinion, and a manually twistable member mounted on the steering handle of said outboard motor for rotating said shaft.

2. In a speed control mechanism for a motor boat having an outboard motor and a tiller, a propeller, a pair of opposed curved deflector plates-mounted to swing on either side of the propeller, .ntermeshing gears secured to said Ig plates, twistable manual control means coax. lally mounted on said tiller, and a flexible cable connecting one of said gears with said control means to swing said plates and control the flow of water driven by said propeller for ga varying the speed of said motor boat.

3. In mechanism for controlling the speed of a motor boat having an outboard motor provided with a driven propeller and a tiller handle for swinging said motor and propeller to steer the 2 boat, a pair of opposed plates swingably mounted one on either side of said propeller, rotary control nfeans twistably mounted on said handle and on the same axis therewith, and means responsive to the twisting of said control means to swing 3 said plates about the propeller to control the flow of the water driven by said propeller and thereby the speed of said boat.

4. In mechanism for controlling the speed of a motor boat having an outboard motor secured g thereto and provided with a driven propeller and a tiller for swinging said motor and propeller to steer the boat, a pair of opposing deflector plates adapted to be swingably mounted one on either side of said propeller, a twistable sleeve adapted to surround said tiller, a rotatable flex. ible shaft connected at one end to said sleeve and at its other end drivingly connected with said plates to cause them to swing when said a sleeve is twisted and thereby control the speed of said motor boat.

5. In mechanism for controlling the speed of a motor boat having an outboard motor provided with a driven propeller and a handle tiller for O1 swinging said motor and propeller to steer the boat, a pair of opposing swingable plates mounted at the sides and rear of said propeller, a rotatable flexible cable drivingly connected to Ssaid plates to cause them to swing in opposite 13 directions, a twistable grip coaxially mounted on said handle tiller, said grip being connected to said flexible cable to rotate it when twisted, whereby the speed of said boat may be controlled. 6. In mechanism for controlling the speed of 20 a motor boat having an outboard motor and a propeller mounted thereon, a tiller handle for swinging said motor and propeller about a substantially vertical axis to steer the boat, a pair 2 of opposed plates swingably mounted on substantially vertical axes one on either side of the propeller and adapted when swung to enclose the rear of said propeller, a flexible shaft drivingly connected to said plates in such a manner as to cause them to swing in opposite directions, a tubular grip coaxially mounted on said handle adapted to twist on a substantially horizontal axis, said grip being connected to said shaft to rotate it when twisted, whereby the speed of 3a said boat may be controlled.

HOWARD P. ANDERSON.