US849048A - Fuel-feed for hydrocarbon-engines. - Google Patents

Description

PTENTED APR. 2

E. T. CABLE. FUEL FEED FOR HYDROGARBON ENGINES.

APPLICATION FILED 0CT.8.1906.

@Winsum UNITED sTATEs PATENT oEEroE.

FRANK TAYLOR CABLE, OF QUINCY, MASSACHUSETTS, ASSIGNOR TO ELEC- TRIC BOAT COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION' OF NEW JERSEY,

Specification of Letters Patent.

Patented Aprilv 2, 1907.

Application filed October 8,1906. Serial No. 337,945.

T0 all whom, it may con/cern:

Be it known that I, FRANK TAYLOR CABLE, a citizen of the United States, residing at Quincy, county of Norfolk, State of Massachusetts, have invented certain new and useful Improvements in Fuel-Feeds for Hydrocarbon-Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art-to which it appertains to make and use the same.

The object of the invention is to provide a simple and efficient fuel-feed mechanism for hydrocarbon engines whereby a constant supply of liquid may be maintained in the carbureter irrespective of the speed of the engine.

In the accompanying drawings, Figure l is an elevation of a hydrocarbon-engine installation involving the invention. Fig. 2 is a vertical section through the float-chamber and valve-casing.

In explosive-engine installations of large power or multiple units, or where an installation will not admit of the gravity-feed arrangement because of the location of the supply-tank at a lowerlevel than that of the carbureter, it is advantageous or necessary to supply the liquid fuel to the carbureter by means of a pump or other positive feeding means. The diliculty which exists in regulating such la positive feed in exact accordance with the diiierent speeds of the engine has given rise to the provision of means to take care of the overflow and prevent'the carbureters bein flooded.

The present invention contemplates, in connection with such a positive or power feed for the liquid Jf'uel, means to insure a constant level of Jr'uel in the carbureter at all speeds, the nature of which will be understood from a consideration of the accompanyin drawings and the following description, w 'ch illustrate and describe the preferred'form. n

In thel accompanying drawings, E` indicates an explosive-engine of any approved type, which receives anex losive mixture from the carbureter a. aid carbureter may be of any of the'well #known types adapted to maltain a constant level ofgasolene 4or the like, but v.is preferably given the;

form shown in the drawings, which includes a central mixing-chamber b, surrounded by a liquid-chamberc, said chambers being connected by an upwardly-inclined duct e, controlled by a needle-valve f. The explosive' mixture of air and hydrocarbon vapor is delivered from the mixing-chamber to the engine by a suitable inlet-pipe d, as will be yun- 6o derstood. i

The gasolene or other liquid fuel is supplied to the carbureter from a tank or reservoir h, which may be located at any con'i venient point, a supply-pipe g serving to con- 6 5 vey the liquid from the tank to the carbureter. vConnected to the `supply-pipe g is some positive means for maintaining a constant supply of gasolene or the like, Aand said positive means may conveniently consist of 7o the pump, as p, driven from the'shaft of the engine.

An overflow-pipe w is connected to the carbureter in proper relation to maintain the desired depth of gasolene or the like in the A chamber c of the carbureter., and said overlow-pipe w is connected to a float-chamber fi, into which the liquid overflow from the carbureter is-delivered.v Said float-chamber i is adapted to be conneected in the sup ly-pipeo g between the pump p and the overV ow-pipe w and for this purpose is provided with a nipple 'i' onits bottom, which constitutes a casing for a valve r, adapted to ,close against a lower seat u or' an upper seat t, as will85 be hereinafter more particularly explained. Within the chamber 'i' there is mounted a iloat j, of cork or other suitable material, which is swung from the topof the chamber t by means of suitable links Z, which consti- 9o tute I levers of the first class, one end being pivoted to the float and the other end engaging a collar n on the rod 7c of the valve r, sald .rod passing centrally through the float. The y collar n is .conveniently secured to the rod lc 9 5 tions of, operation the level of the liquid'inl the chamber c of the carbureter is to be mainroo io explosive mixture about as fast as it is delivered by the pump there will be little or no overflow' from the earbureter by way of the pipe yw, and consequently the float in cham- X bert will occupy its lower position, as shown l I 5 1n Fig. 2, thereby closing the valve fr against valve-seat t and disengaging said valve from the seat u, thereby fully opening communication between the pump and the supply-tank 7l. Should the speed of the'punp increase, or Jfor zo any other reason should the amount of gasolene supplied to the carbureter exceed that required for working the engine, the excess will overiiow by way of pipe w and enter the float-chamber t'. As the overflow increases the loat y' will rise, thereby seating valve r against the lower' valve-seat u, closing communication between the pump and the supply-tank and opening up direct communica-v tion between the pumpand the float-cham- 3c ber, so that the Huid contained in the latter will be pumped by way ot the Asu }i ply-pipe g back into the carbureter and will circulate in the closed system comprising the vsupplypipe g, chamber v oi' the earbureter, overllowpipe w, Heat-chamber yif, until the quantity of the overflow has been so far reduced as to fail to raise the lloat j, which will arcordingly fall and again elevate the valve r to close the exit of the float-chamber and open a through- 40 passage from supply-tank h to the pump p.

This operation is entirely automatic and insures a constant level of gasolene in the carbureter without the least danger of flooding the saine irrespective of the speed of the engine and the feed-pump.

The Heat-chamber 'i is conveniently provided with a vent v for carrying eti' any vapors which may collect in the chamber, and in order to observe the height and condition 5o ef the liquid in the float-chamber the latter may be provided with a suitable sight-glass. Having thus described my invention, what I caim is- 1. "In a fuel-feeding system for hydrocarbon-engines, the combination of earbureter, a supply-pipe leading thereto, an overflowpipe leading therefrom, a supply-tank, a float-chamber connected with the overflowpipe and with the supply-pipe, a valve operated by the loat to control the communication of the supply-pipe with the tank and the float-chamber respectively, and means in the supply-pipe between the float-chamber and the carbureter for forcing the liquid into the carbureter. ,y

2. In a fuel-feeding system for hydrocarbon-engines, the combination of a constantlevel carbureter, a supply-pipe leading thereto, an overllow leading therefrom, a supplytank, a chamber connected with the overflow-pipe and with the supply-pipe, a float in said chamber, a valve operated by said iioat to control the eomnninication of the supplypipe with the tank and the float-chamber respectively, and a pump in the supply-pipe between the Heat-chamber and the earbureter.

3. In a fuel-feeding system for hydrocarbon-engines, `the combination of a constant- 0levelrarlnlrcter, a supply-pipe and an overflow-pipe connected thereto, a supply-tank, a pump in the supply-pipe, and means regulated by the overtlow from the carbureter for connecting the pump-inlet to the supplytank'or to the overlow-pipe.

4. In a fuel-feeding system for hydrocarbon-engines, a earbureter having a liquidchamber and a mixing-chamber and a regulable valve between the said chambers, and means for maintaining a given level in the liquid-chaml:er, iomprising a supply-tank, a pipe connecting said tank with the liquidehamber of the carbureter, an overflow-pipe connected to said liquid-chamber, a floatchamber conne( ted to said overflow-pipe and to said supply-pipe, a float in said floatehamlier, a valve operated by said float to control the communication of the supply- A pipe with' the tank and the float-chamber respectively, and a. pump in the supply-pipe between the float-chamber and the carbureter.

In testimony whereof I al'iX my signature iiipresence of two witnesses.A

FRANK TAYLOR CABLE. /Vitnesses:

' W. D. FEsLER, F. L. BRAKE.

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