US1112374A - Carbureter. - Google Patents

Description

D MoR. LIVINGSTON.

GARBURBTER.

APPLIOATIOH FILED AUG 10, 1911.

Patented Sept. 29, 1914.

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1 WITNESSES ATTORNEYS 1) Men. LIVINGSTON.

OARBURETER.

APPLICATION FILED AUG 10, 1911.

1,112,374, Patented Sept. 29, 1914.

, I 2 8HEETS- SHEET 2.

WITNESSES INVENTOR ATTORNEYS till D MoBA LIVINGSTOIhL or New You, n. Y.

cannon-mm Application filed August 10 Specification. of Letters Patent.

Patented Sept. 29, 1914-.

T 0 all whom it may concern:

Be it known that I, D .McRA Lrvmos'ron, a citizen of the United States, and a resident of the city of New York, borou h of Manhattan, in the county and State 0 New York, havesinvented a new and Improved Carburetor, of which the following is a full, clear, and exact description.

The object of the invention is to provide an improved form of carburetor, which will serve for the production of a proper fuel mixture under all conditions of opera tion of the engine.

Reference is to be had to the accompanying drawings, forming a part of this specification. in which similar reference characters indicate corresponding parts.

Figure 1 is a sectional elevation of a portion of the carbureter, showing my improved nozzle. Fig. 2 is an enlarged sectional View of the nozzle. Fig. 3 is a horizontal section on approximately the line 33. Fig. 2. Fig. 4 is a vertical section of a modified form of nozzle embodying my invention, and Fi 5 is a horizontal section on line 55 0% Fig. 4.

My invention may be embodied-in any suitable carburetor body 10, having the usual reservoir, connecting as by a passage ll, with the chamber 12, closed by the usual screw plug 12, beneath the base plug 13 of the nozzle ll, the said nozzle extending as usual into the mixing tube 15, leadin to the engine, the said tube being provided with any approved throttle 16 and air inlet l7.

In the base 13 any suitable regulating plug may be provided, here shown as a single plug 18, havin a passa e 19 leading to the interior 0 the nozz e 14. The nozzle proper or main jet of my improved invention 1s formed by the'outer wall of the nozzle and an inner wall 20, providing an intermediate 'gasolene chamber 21. Within the inner wall 20, an air pipe 22 rises from the base 13 and is supplied with air through any suitable. inlet 23 that desirably is connected with the air pipe 22 by the peripheral grooye 24 in the base pl 13. and the connecting passage25 that lea from the peripheral groove to the interior of the airpipe 22, at the base of the latter. lln connection with the air pipe 22, I pro- 1911. Serial No. 648,312.

vide a device whereby the gasolene will form a liquid seal at the outlet end 26 of said air pipe; advantageously this device for the seal may consist of a housing 27, that sur rounds the pipe to any desired extent along the length thereof, but preferabl only extending a short distance below t e top, as clearly shown in Figs. 1 and 2. The housing 27, is preferabl closed,-except for the provision of an out et, so formed that more or less air ma be drawn from the air pipe 22 and throug the housing 27, sothat there will be a gradual breakin oflthe liquid seal and-.a consequent gra ual increase in the amount of air drawn through the nozzle, according'to the extent of the vacuum produced by the speed of the engine. Desirably the outlet from the housing may consist of a diagonal series of holes 29, leading outward from the interior of the housing 27, to the space between the said housing and the inner wall 20 of the main jet or nozzle proper. It will be observed that thepipe 22, and its housin 27, form in connection with the inner wal 20, of the main jet, a gasolene chamber 30, constituting a second or auxiliary jet. There may be in practice any suitable means for supplying both the outer jet or-nozzle proper and the auxiliary jet or chamber with gasolene. In the present instance there is a single plug 18, leading to the chamber 30, and any suitable opening 32, may be providedin the wall 20, establishing a communication between the inner and outer jets. The regulation at the base,however, need only be approximate, because it will be seen that the described liquid seal for the air pipe and-the capacity of'the diagonal openings 29, determine the amount of.air drawn through the auxiliary jet under high speed. Normally both jets will simply deliver gasolene only when the engine is under slow speed, but upon an increase of the speed, the air will be drawn into the chamber 30 which constitutes the passage between the fuel connection and the "outlet of the nozzle of the auxiliaryjet or feed device, the air. being drawn. into-said chamber. or assage through the air inlets 29 leading thereto, and as these inlets are at different levels, under increasing speed an increasing amount of air wilLbe drawn into the chamber 30 through successive inlets brought under the influence of the suction, to mix with the fuel being drawn upward in the said fuel chamber toward the nozzle outlet. Thus there is a relatively decreasing fuel discharge from the auxiliary nozzle or jet under the suction of increasing engine speed as compared with the main fuel-feed jet, the latter being fully respon: sive with a relatively increasing fuel discharge.

The dotted line in the gasolene reservoir at the left of Fig. 1 indicates approximately the height of thegasolene in said reservoir, and the gasolene' will rise ordinarily to a similar height in the gasolene chambers 21 and 30. r

It will be seen that the described automatically regulating nozzle is self-contained, the members being mounted on the plug 13, which can be readily adapted to most forms of carbureters now in use, a slight modification only being necessary to rovide the necessary induct for the air to t e contained air chamber of the nozzle.

Referring to Fi s. 4 and 5, I have shown another form of t is nozzle, in which the air chamber 35, is at the exterior of the nozzle instead of the center asin the first described form. "Within the outer skirt or depending casin 36, forming an outer wall of the air eham er35, there are supported on the base 37, spaced, concentric walls,

3839, forming concentric gasolene cham: hers or jets 4041, provided with separate gasolene ducts, 4243, controlled by regu'; ating plugs, 44-45, In connection with the casing or wall 39, of the inner chamber or jet, 41, I preferably provide a bushing 46, which reduces or contracts theup er outlet end of the said chamber 41, and may also provide as shown a deflector 47, said deeetor extending from the wall 39 and flaring outwardly and u wardly, above" the gasolene chamber 40, t e outer edgeof the deflector being joined by a horizontal portion 48 to the exterior wall or skirt 36 of the air chamber 35, thus formin a passage between the ,upperend ofthe sa'i air chamber and the upper end of-the adjacent, ascleneehamberw. Near the upper end 0 the interior wall 39, said wall is provided with a diagona-l series of orifices e9, thereb establishing a communication between t e two solene chambers or jets, 40-41. Above t e outlet end 46 of the chamber 41, a plu fiO nay bescrewed, provided at its lower en with an inverted, truncated cone 51, disposed opposite'toand s seed from the deflector 47 for deflecting an mpre efiectivelybreaking up thegasoleneor mixturei issuing from the outlet 46, the mixture final y finding an outlet through holes 52 in the upper end of the nozzle beiow the screw plug 50 therein.

lay-the ene" tr'oughthe outlet 4J8,

soiene will be taken without any admixture of air taking place in the nozzle while the engine is running at slow speed. I pon an increase of speed, however, the level of the gas'olene in the chamber 40 will be lowered and air will be taken along with the gasolene through the openings 49 in proportion to the increase in the speed.

In both forms of the invention, the air chamber is provided in the nozzle itself, so that the nozzleis self-contained and may be completely inserted in a carbureter, ada ted to receive the base plug 13 or 37. In 0th forms also, the upper end of the air chamber is sealed by the gasolene, .under normal or slow speed conditions.

Although the invention is mainly designed to produce a self-contained, automatically controlled nozzle, functioning without adventitious air or fuel chambers for governing the suction control of the air supply under high speeds, it will be obvious that in some of its aspects the invention is not limited to a self-contained nozzle.

To prevent a too sudden breakin of the liquid seal of the air'chamber the ousing 27 or the next adjacent wall, 21, or both, may be formed out of parallelism, asby tapering the housing as at 27, Fig. 2. In this way the suction, after partially breaking the liuid seal, will have a less pronounced e ect in drawing in the air, owing to' the gradually increased widening of the throat or space between the housing and the adjacent wall.

- .Having thus described my invention, I

claim as new, and desire to secureby Letters Patent:

1. A carbureter nozzle com rising a suction controlled jet and an air uct extending into the nozzle and having a suction controlled fuel seal at its outlet end within the nozzle, the sealed area of the said outlet of the air duct decreasing with the extent of the suction exerted on the nozzle.

2. In .a carbureter, the combination of a fuel reservoir, a nozzle having a fuel feed jet communicating with said reservoir, and an air feed provided with a variable outlet with'n the nozzle adjacent to the outlet of the uel feed jet, and having a suction controlled fuel seal, lowering in pro ortion to the suction exerted on the fuel fee jet.

3- In a carbure ter, a fuel feed device having a fuel connection, an outlet, a fuel passage from the fuel connection to the outlet, and airinlets leadin to the said fuel passage at diiferent'leves between the fuel connection and the outlet, the said air inlets being normally sealed, under low speeds, by the fuel,

4. In a carbureter, a main fuel feed device and an auxiliary fuel feed device, each having a fuel connection, an outlet, and a fuel 1 from the fuel connection to the outlet, and the auxiliary feed device having In testimony whereof I have signed my air inlets leading to the fuel assage thereof name to this specification in the presence of at difi'erent levels between t e fuel connectwo subscribing witnesses. tio'n'and the outlet, the said air inlets being D McRA LIVINGSTON. normally sealed by the fuel at low speeds Witnesses:

and admitting air in succession under high J. L. MOAULIFFE,

speeds. JOHN P. DAVIS.

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