US1741706A - Automatic choke-valve control - Google Patents

Description

Dec. 31, 1929. P. F. LITTLE AUTOMATIC CHOKE VALVE CONTROL Filed March 26, 1928 INVENTOR.

PERCYELITTLLQ @YWQVWMMX/' ATTORNEY.

Talented Dec. 31, 1929 IPEBCY F. LITTLE, OF LYON PARK, VIRGINIA AUTOMATIC CHOKE-VALVE CONTROL Application filed March 26, 1928. Serial No. 264,945.

(GRANTED UNDER THE ACT OF MARCH 3, 1883, AS; AMENDED APRIL 30, 1928; 370 0. G. 757) This invention described herein may be manufactured and used by or for the Government for governmental purposes Without the payment -to me of any royalty thereon.

This invention relates to anew and useful carbureter choke valve control, the im'ention being particularly useful in connection wlth motor vehicles.

Heretofore choke valve controls have been constructed in connection with automobile engines, which necessitated changing some part of the engine equipment'so as to adapt them to the construction of the particular car in which they were to be used. The cost of doing this hardly justified the means.

One of the objects of the invention is to provide a device which will automatically regulate a carbureter choke valve through the use of the starting motor.

Another object of my invention is to eliminate the possibility of the carburetor flooding by regulating the air which enters it.

Another object is to provide a simple, inexpensive, automatically operated choke valve control. 7

Still another object is to construct a choke valve control which is easily attached and detachcdL.

Still other objects will appear in the description which follows hereinafter taken together with the accompanying drawing in which,

Fig. 1 is a perspective view of my invention as applied to an automobile starting mechanism and,

Fig. 2 is an enlarged fragmentary sectional view of the regulator mechanism.

The electrical circuit which is shown on the drawing is of the usual ty e now employed and consists of battery (1 starting motor (2), starting switch (3), all connected in series by cables 1) and grounds (5).

Mounted on the shaft (6) of starting motor (2) is a centrifugally operated choke valve rivets (l1) as shown in Fig. 2 of the drawing.

regulator (7) comprising flexible elements The block is adapted to reciprocate within a housing- (25) which will hereinafter be described. 1

The block (10) is connected at its other end to a spring (26), the purpose of which will also appear hereinafter. The block has a centrallyv located groove (12) which is adapted to freely receive and hold therewithin the head (13) of the arm (14) of bell crank (1.5), whereby the block (10) may reciprocate freely and at the same time maintain constant engagement with the head (13).

Bell crank (15) is pivoted at (16), and has an arm (17) which is attached to a rod (18) by suitable means as bolt (19), which is inserted in elongated slot (20) of one end of rod (18), to allow free movement of the rod (18) with respect to arm (17 of the bell crank. The otherend of the rod (18) is connected to the crank (21), which in turn is fixed to butterfly valve (22) located in the air intake manifold (23) which leads to the car-. .bureter (24:). 4

The operation is as follows: When starting switch is depressed, the motor begins to rotate and weights (9) of the governor or regulator (7) are then caused to separate or fly apart under centrifugal action to shorten the distance between shaft (6) and the block (10). In other words the block (10) is caused to move toward shaft (6) and as it does so, it carries the arm (14:) of bell crank (15) with it.

The groove (12) has the shape of a portion of a circle, in cross-section, while the head (13) is substantially spherical. This permits the head to rotate in groove (12) while the block is being drawn toward the motor as above described. The arm (17) of the bell crank (15) causes the rod (18) to be moved away from the intake manifold (23), thus pulling with it the crank (21) and partially shutting off or regulating the flow of air in the manifold by movement of butterfly valve (22). When the motor has started and the foot is removed from the starting switch, the reverse operation takes place and the parts assume their normal position. To insure block (10) of always being in alignment with shaft 6), a housing (25) is employed which is attached to the frame of the car. The spring (26) is attached at one end to block (10) as shown, and at the other end to said frame, as to projection (27), said spring may be employed to insure block (10), returning to its normal position.

However, I do not consider the latter absolutely necessary, since the device will operate equally well without the spring (25), said spring merely being provided as a possible precaution against weakening of the flexible elements (8) of the regulator.

It will be obvious to those skilled in the art that various changes in the construction of my invention and relative position of parts may be resorted to without departing from the spirit thereof. I therefore do not limit myself to the specific embodiment shown and described therein and may be modified in various Ways without sacrificing the advantages of the invention or departing from the scope thereof as defined in the appended claims.

Having now described the nature of my invention together with the operation thereof, what I desire to protect by Letters Patent and claim as my invention is:

1. In combination, a starting motor, a carbureter, a valve for said carbureter. and me chanical control means connecting said starting motor with said valve.

2. In combination, a starting motor, a carbureter, a valve in the intake of said carbureter, and mechanical means connecting said starting motor and said valve for automatically regulating said valve.

3. In combination, a starting motor, a carburetena valve for said carbureter, expansible and contractile means connected with said starting motor, and means connected to said expansible andcontractile means and to said valve for regulating said valve.

4. In combination, a starting motor, a car bureter, a valve for said carbureter, centrifugally operated means connected to said starting motor and means connecting said centrifugally operated means to said valve for regulating said valve.

5. In combination, a motor, a shaft in said motor, a block having a peripheral groove therein, means connecting said block to said shaft, a carbureter, a valve for said carbureter and means loosely mounted in the groove of said block and connected to said valve for operating the valve upon rotation of the motor.

6. In combination, a motor. a shaft in said motor, a block having a groove therein, means connecting said block with said shaft, a carbureter, a valve for said carbureter and means mounted in the groove of said block and connected to said valve, for automatically operating the valve upon rotation of the motor.

7 In combination, a motor having, a shaft, a block having a groove therein, flexible means connecting said block with said shaft, a carbureter, a valve for said carbureter and means mounted in the groove of said block and connected to said valve for operating the valve upon rotation of the motor.

8. In combination a motor, a shaft therefor, a block having a bearing groove therein, flexible means connecting said block with said shaft, a carbureter, a valve for said carbureter and means mounted in said bearing groove and connected to said valve, for automatically operating the valve upon rotation of the motor.

9. In combination, a motor, a shaft therefor, a block having a groove therein, flexible means connecting said block with said shaft, a frame, a spring connecting said frame and block, a carbureter, a valve for said carbureter and means mounted in the groove. of said block and connected to said valve for automatically operating the valve upon rotation of the motor.

10. In combination, a motor, a shaft therefor, a block having a groove therein, flexible means connecting said block with said shaft, a frame, a support mounted on said frame for guiding said block, said frame and blockbeing connected by a spring, a carbureter, a valve for said carbureter and means mounted in said groove and connected to said valve for automatically operating the valve upon rotation of the motor.

11. In combination, a motor, a shaft in said motor, a block having a circumferential groove therein. flexible means connecting said block with said shaft, a frame, a support mounted on said frame for guiding said block, a spring connecting said frame and block. a carbureter, a valve for said carbureter, and means comprising a bell crank pivotally mounted on said frame and engaging said grooveand a rod pivotally connected to said bell crank, said rod being connected to said valve for automatically operating the valve upon the rotation of the motor.

12. Means for automatically operating the choke valve of the carburetor of an internal combustion engine having a starting motor coupled thereto comprising, link means connected to said valve, a rotatable member having a circular groove engaging said link means, and a centrifugal ball governor connecting said member. with the shaft of said starting motor.

13. Means for simultaneously turning over an internal combustion engine and choking the carburetor thereto, comprising a switch controlled starting motor and a choke valve for said carburetor and mechanism connecting the shaft of said starting motor with said choke valve.

PERCY F. LITTLE.

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