US1381867A - Fuel-feeding device for carbureters - Google Patents

Description

' P- P. GILLES. FUEL FEEDING DEVICE FOR CARBURETERS.

APPLICATION FILED JULY 28. l9l9.

1,381,867, Patented June 14, 1921.

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ATTOR N EY5.

UNITED STATES- PIERRE P. GILLES,

CHICAGO, ILLINOIS.

' FUEL-FEEDING DEVICE FOR CARBURETERS.

Application filed July 28,

To all whom it may concern:

Be it known that I, PIERRE P. GILLES, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Fuel-Feeding Devices for Carbureteis, of which the following is a specification.

This invention relates to fuel feeding devices for supplying fuel to carbureters by suction from a low level fuel supply tank.

The invention has for its object to provide, in a fuel feeding device for carburetors, an improved valve mechanism for operatin the air and suction valves, either or hot as desired.

More particularly, the invention is concerned with generally improved means for sharply actuating a valve from a float, which gradually rises, and especially a valve which is held to its seat by suction, such as the air and suction valves of the usual fuel feeding device.

I am aware that float operated valve actuating mechanism of the general type a described has been provided heretofore in various forms,one example being shown in U. S. Letters Patent No. 1,255,306, granted to me on February 5, 1918,and this invention is concerned with improved means for obtaining the same general result.

Other objects and advantages will appear in the following description and in the illustrative embodiment of the invention in the accompanying drawings, in which:

Figure 1 is a sectional elevational view of a fuel feeding device embodying the invention;

Fig. 2 is a fragmentary sectional plan view thereof; and

Fig. 3 is a fragmentary sectional elevational view taken generally similar to Fig. 2 and illustrative of a modification in detail.

Referring to these drawings in detail; A represents a suitable fuel supply chamber, which is adapted for connection by a pipe I) with a low level fuel supply tank. Chamber A is adapted to supply fuel to a suitable carbureter in any of the ways now well known in the art. In the drawings 0 indicates conventionally the fuel outlet for chamber A. A passage 03 connects the upper part of chamber A to the atmosphere and this air connection may be closed by a ball valve 6. A passage 7, adapted for connection at one end to suction means, may be connected at Specification of Letters Patent.

1919. Serial No. 313,781.

its other end to the upper part of chamber A, by the lowering of a valve g. Valve g has an upstanding extension it which is arranged to lift ball 6 from its seat when valve 9 closes and to permit balls to drop back upon its seat when valve opens. The structure thus far described is generally well known in the art and further description of it is unnecessary to an understanding of the invention.

The valves 6 and g are adapted to alternately connect chamber A to the atmosphere and to the source of suction, respectively, and the valves are arranged for simultaneous actuation from a float 1'. in chamber A by improved mechanism, now to be described. Pivotally mounted at 10 is a lever 11, which as shown in Fig. 2, has a bifurcated portion to encompass a depending extension 12 of the valve 91 Such extension passes through float i and is suitably guided, as indicated. Extension 12 is provided with a collar 13 and studs 14 (Fig. 2) secured to the bifurcated portion of lever 11 engage between the collar 13 and the lower face of valve 9 in such a manner that a movement of the lever will move the valve 9 and its extensions h and 12. Pivotedto the free end of lever 11, is a rod 15 which passes loosely through a bracket 16 secured to the float 2'. Fixed on rod 15 are two spaced collars 17 one above and one below the bracket 16, and a spring 18 is disposed between each collar 17 and the bracket 16.

As an alternative, the lever 11 may be directly connected to float i by means of link 19, as shown in Fig. 8, and arranged to engage a grooved collar 20, which is slidably mounted on the extension 12. One spring 18 is then placed on the latter between the collar 20 and valve g and the other spring 18 acts between collar 20 and a collar 21 fixed on the extension 12.

With the parts in the relative positions illustrated in Figs. 1 and 3, the chamber A is filled to its highest level with fuel and the suction passage 7 has been closed by valve 9 and the air inlet (Z opened by valve 6. As the fuel level lowers in chamber A, float i radually descends. The valve g, however, 1s held to its seat by suction and does not immediately move away from its seat on the lowering of the float. As the float z descends, the lower spring 18 becomes compressed and, when compressed suflicient'ly to overcome the force holding valve 9 to its Patented June 14, 1921.

seat the lower sprin suddenly expands and sharply and sudden y moves valve 9 to its lower position. Thus, the air valve 6 is closed and suction valve 9 is opened. As the fuel level rises in chamber A, the float z gradually ascends but the valve 9 and its extensions h and 12 are not immediately moved for the valve 6 is held to its seat by suction and the abutment of extensions h with valve 6 prevents movement of the valves until the upper spring 18 has been compressed sufficiently to overcome the force that holds valve 6 to its seat. At such time, valve 6 is sharply and suddenly opened, thus breaking the vacuum in chamber A, and valve 9 is simultaneously closed to cut off the suction connection.

Thus an improved float operated valve actuating mechanism has been provided for fuel feeding devices for carbureters. It is recognized that modifications may be made in the structure herein described for illustrative purposes and the scope of the invention 1s, therefore, to be defined by the appended claims rather than by the foregoing description.

What I claim is- 1. In a device of the class described, two valves each adapted to be held in closed position by suction, means to actuate the valves one from the other so that one is opened when the other is closed and the first is closed when the second is open, a float by the rise and fall of which the valves are to be operated, and means connecting the float to one valve; said means including a lever to increase the force exerted by the float, a spring through which the force from the float is transmitted to the last named valve on rising movement, and. a second spring through which the force from the float'is transmitted to the last named valve on falling movement.

2. In a device of the class described, two valves, each adapted to be held in closed posltion by suction, means to actuate the valves, one from the other so that one is open when the other is closed and the first is closed when the second is open; a float by the rise and fall of which the valves are to be operated, and means connecting the float to one valve; said means including a pivotal lever connected to the float to be swung thereby and arranged to increase the force exerted by the float, a spring through which the force is transmitted to the last named valve by said lever on its movement 1n one direction, and a second spring through which the force is transmitted to the last named valve by said lever on its movement in the opposite direction.

3. In a device of the class described, two valves each adapted to be held in closed po- SltlOII by suction, means to actuate the valves one from the other so that one is open when the other is closed and the first is closed when the second is open, a float by the rise and fall of which the valves are to be onerated, a rod fixed to the last named "alve spaced abutments provided on the rod, a member slidable on the latter between the abutments, springs interposed between the member and the abutments, and a pivoted lever connected to be moved by the float and connected to slide said member on said rod, whereby the gradual movement of the float in either direction compresses a spring and such spring when sufiiciently compressed suddenly actuates the valves.

PIERRE P. GILLES.

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