US1789423A - Starter for outboard motors - Google Patents

Description

Jan. 20, 1931. V J N N 1,789,423

STARTER -,FOR OUTBOARD MOTORS v- Filed March 2. 192a -Wg flg fi/Q v wmmm M ATTORNEY Patented Jinan, 1931 i means JOSE'EH SCGTT BENSON, OF DAVEN PORT, IGWA STARTER- FGR O'UlC'IBOARD MOTORS npplication filed March .2,

My invention has reference to a starter for an outboard motor, and has for its purpose to facilitate the ease and speed with which said devices may be put in operation. In the common two-cylinder types of such machines, each of which is provided with its own sparking system, when it is undertaken to start the motor the electrical energy is so divided between the two systems that neither one is 19 strong enough to produce the desired spark,

and cause ignition oi the charge in the cylinder. As a result the crank-shaft has to be rotated a number of times before the engine responds, and as the rotating of the shaft is accomplished by means of a cord or cable,

wound on a disk orwheel on the crank-shaft,

and rawn forcefully outward, the task soon becomes an arduous and distasteful one. At

each operation the cord has to be re-wound,

causing considerable delay between one operation and the next, and frequently losing the advantage of the preceding stroke.

The chief purpose of the present invention is to provide a shaft rotating mechanism conraining stored power devices by means of which the-same can be instantly returned toits initial position, after being actuated, and in which a number of starting operations can he made to follow each other in quick succession. It is also coupled up with the usual fly-wheel of the motor, which assists in the continuity of movement of the crank- The device is of simple construction and compact form, and can be quicklyattached to out-board motors already in use, or removed therefrom. All of the mechanical arts are enolosedso as to be fullyprotected our the elements. 4-3- In the single figure of the drawings the invention is shown in medial cross-section, as.

it appears when attached to an out-board motor, the older parts of the machine bein diagrammatically portrayed.

The motor organism is indicated at A, ineluding a. pair of oppositely disposed cylinders B and C, upon which is mounted a cir cular casing 1, so arranged that it can be held in place by the usual spark'plug 0011-. 59 nections, shown at D and E. Centrally oi the 1929. Serial No. 344,049.

casing 1 is the'upper end of the crank-shaft 2 of the motor, upon which shaft is supported a fiy-wheel 3.

In the upper part of the casing 1 is an opening in which is secured a housing 4, projected upwardly from which is a smallercasing 5, in which is rotatably mounted a short shaft 6. Fixed to said shaft near the lower end thereof is a clutchinember 7, the teeth of which are engagable with oppositely disposed teeth on a'clutch member 8, which has a threaded connection with the upper end of the crank-shaft 2,'the fiy-wheel 3 being supported indirectly by said clutch-member 8. The lower end of the shaft 6 is slidable in a bore 9 in the member-8, the pivotal connection thus formed insuring a steady operation oi the shaft, and preventing the same "from getting out of al gnment when a lateral, stress isplaced thereon.

The upper. part of the clutch 7 is fitted with a. disk 11, to which is fixed the web of a'sheave 12, upon which is wound a cord 13, one end of said cord being attached to the sheave and the other end passing out of an opening in the housing 4, at 14. The end of the cord is also provided with a knob 15', by means of which it can be drawn outwardly, giving rotation to the sheave 12 and, shaft 6. 30

Secured to the upper end of the shaft 6 is a hand thrust-plate 16, provided with a hub 17, vertically movable in a sleeve 18 on the casing 5. Within said sleeve is a coiled spring 19, the force of which tends to hold the shaft 6 and parts supported thereby in an elevated position, as shown in the figure of the drawings. By placing one hand on the plate 16 and forcing the same downwardly the operator can secure an engagement between the teeth of the clutches 7 and 8, and by accompanying such movement with the operation of the cord 13 with the other hand the shaft 6 will be rotated, and the rotary movement thereof imparted to'the shaft 2, for the purv pose of giving an initial operation to the motor, for setting the'same in motion. With-- in the casing 5 is a clock-spring 21, the outer end of which is attached to the casing, asat a, and the. inner end connected with a sleeve we 22, loose on the shaft 6, and in which is fixed a pin 23, slidablein a channel 24 in the shaft 6. Upon the cord 13 being drawn outwardly .nected with said pilot shaft for returning thesame to its initial position after an operation the spring 21 is wound up, the stored force thereof operating to reverse the movement of the sheave 12, and re wind the cord 13 thereon, upon such cord being permitted a little slack. In the return movement the pressure on the hand-plate 16 is released sufliciently to permit a dis-engagement of the clutches 7 and 8, such pressure being renewed when the cord is to be drawn outwardly again. By this means a number of movements can be given to the crank-shaft in quick succession, the intervalsbetween said movements being very brief, and resulting in a quick response of the ignition devices and starting of the motor. The fiy-Wheel 3 assists in making the movement continuous. The hand-plate 16 is preferably connected with the shaft 6 so as to be rotatable independently thereof.

The parts of the device can be quickly assembled by attaching the clutch 7 and sheave 12 to the shaft 6 and passing said shaft upwardly through the casing 5 and sleeve 18, after which the spring 19 is put in place and the hand-plate 16 secured to the shaft. The parts can be as readily detached from each other. In inserting the shaft 6 or removing the same the pin 23 slides in the channel 24.

It will be noted that the. operative. parts are all fully enclosed and protected within the casing 1, housing'e, and easing 5, and the hand-plate 16 forms a shield for the upper end of the sleeve 18. a

What I claim, and desire ters Patent, is:

1. The combination with a motor and crank-shaft thereof, of a pilot shaft adapted to secure by Letfor detachable connection with said crankshaft, a hand-pressure head on the end of said pilot shaft, means for holding said pilot shaft normally out of engagement with said crankshaft, a rotor on said pilot shaft, a flexible element wound on said rotor, for giving ro- I tation thereto, and stored power devices conthereof.

2. A device of the class described, comprising a housing, attachable to -a motor frame, a pilot shaft rotatably mounted in said housing, adapted for engagementwith the crank-shaft of a motor, and provided without the housing with a hand-pressure device, means for holding said pilot shaft normally out of engagement, a rotor fixed to fly-wheel thereon, a housing on said casing,

a relatively small casing on said housing, a

pilot shaft rotatably mounted in said lastnamed casing, provided without the casing with a hand-pressure device, and adapted for en agement with said crank-shaft, means for ho ding said pilot shaft yieldably out of engagement therewith, a sheave'in said houslng fixed to said pilot shaft, a cord fixed to said sheave and wound thereon, and having one end projecting through an opening-in said housing, and a spring mechanism contained in said small casing, operatively connected with said pilot shaft, and capable of having power stored therein to automatically reverse the movement of said sheave followin a rotation thereof to start the motor.

11 testimony whereof I afiix my si nature.

' J. SQOTT BE SON.

said pilot shaft, means for imparting rotary- I impulses thereto, and stored power devices connected with said pilot shaft, and capable of returning the same to an initial position after havin been actuated,

3. A device of the class described, comprising a casing attachable tothe frame of an out-board motor so as to enclose the upper

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