US 944048 A
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Description (OCR text may contain errors)
J. R. PRICE.
APPLICATION FILED FEB. 20, 1906.
944,048. Patented Dec. 21, 1909.
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J. R. PRICE. CARBURETER. APPLICATION FILED FEB. 26, 1906.
94 L048. Patented Dec. 21, 1909.
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WI TNESEEE INVENTUH M BY r 7? ATTV.
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Specification of Letters Patent.
Application filed February 26, 1906. Serial No. 302,968.
To all whom it may concern:
Be it known that I, J OI-IN R. PRICE, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented a new and useful Carbureter, of which the following is a specification.
The objects of this invention are to provide an improved carburetor particularly adapted for use with motors for driving automobiles; to secure a mixture of gasolene and air which shall be of substantially uniform quality or degree of richness; to regulate for this purpose the admission of air to the mixing chamber; to effect such regulation automatically, and independent of the throttle; to secure a simple construction, and one which can be adapted to carbureters already in use, and to obtain other advantages and results as may be brought out in the following description.
The invention consists in the improved carbureter, substantially as will be hereinafter described and finally set forth in the claims. I f t Referring to the accompanying drawings, in which like numerals of reference indicate corresponding parts in each of the several figures, Figure 1 is a vertical central sectional view of my improved carbureter, shown entire with a float chamber or constant level device for the gasolene feed; Fig. 2 is a cross-section upon line at, Fig. 1; Fig. 3 is a view of the vaporizer, partly in central vertical section, looking in a direction at right angles to that of Fig. 1; Fig. 4, is a plan of'the vaporizer, and Fig. 5 is a crosssection as on line y, Fig. 3, with the throttle almost entirely closed, and a certain partition and screens removed.
In said drawings, 1 designates a float chamber, having a float 2 therein controlling an inlet. valve 3, cooperating with a valve seat 4 in the bottom of the tank. The valve seat 4 communicates with a supply connection 5, which may be attached to any suitable reservoir or other means (not shown),
.of feeding gasolene to the chamber 1. At
the bottom of the connection 5 is a drain cock 6, and extending from the chamber 1 is a feed pipe 7, with anupwardly directed exlatented Dec. 21, 1909.
tremity 8, from which the gasolene passes into the vaporizing chamber. All the parts thus far described are old in the art, and it is in the vaporizer, next to be described, that my invention I particularly inheres. Said vaporizer comprises a body portion or ing 9, with a cylindrical interior in which case fits. a rotatable throttle tube -10,-preferably formed of sheet metal. A cover 1 secured to the top of the body portion 9, overlies the edges 12, of the upper open end of the throttle tube 10, and is segmentally cut away for a part of its periphery, as at 13, to accommodate a handle piece 1 L, fixed to the said throttle tube.
At the upper part of the body portion 9, is a lateral throttle opening or outlet 15, from which a tube or connection (notshown) may lead to the motor, and the throttle tube 10, has a corresponding port 16, adapted to be turned into or out of coincidence with the said opening 15. Preferably this port 16, is pearshaped, with its small end 17, extending rearwardly as the tube 10 is turned to close the throttle, so as to enable finer adjustment in closing.
At the bottom 18, of the throttle tube is a central depending extension 19, which receives the extremity 8, of the feed pipe 7, and forms an annular air passage'or inlet around the same. At one side of said air inlet 19, a sector of the throttle-tube floor is cut away as at 20, and in the bottom of the casing 9, is a similar opening 21, the relation of-suid apertures to each other and to the throttle port 16, being such that when construction, the cover 11. has an aperture Ewhich is tapped to receive an uxteriorly threaded sleeve 2:3, providing at its bottom interior slideway for a piston 29, upon the,
a valve-seat 23, facing the vaporizing chamber. A valve 24, normally engages the said -lar sheath 2?", inclosing" the valve stem 25. The sleeve 22, has also its interior threaded,
and an inner sleeve 28, screws into said outer sleeve 22, furnishing at its upper part an end of the valve stem 25. The inner end of 1 said inner'sleeve 28, has arms 30', extending radially inward and. supporting an annular spring seat 31, around the valve stein sheath 27. A cooperating spr ng cap 32, is
. adjacent to the piston 29, and between said spring seat3l, and spring cap 32, are ar rangedspiral sprin s 33, 34, one inside the other, and one, preferably the outer one 34, being lighter and slightly longer than the inner one 33. Obviously, therefore; when the valve 24, is opened by the suction of the motor, it opens against the one or both of thesprings 33, 34, and the tension of said springs, and thus the opening of the valve,
can be regulated by screwing the inner sleeve 28,in the outer sleeve 22. When the outer light spring 34, alone engages the cap 32,
the valve will open very easily, but by increasing the tension of said spring, and by bringing the stifi spring 33, into play, a
, much less sensitive action of the valve is obtained, as may bedesired. The automatic admission of air can thus be regulated.
F or ingressof air, the sleeves 22 and 29,
have each a circumferential series of aper tures, 35 or 36, the number of openings in the two sleeves differing, as six in one and seven'in the other, so as to insurethe registration of at least a p0rt1on of them, irrespective of the adjustment of the springs, as shown in Fig. 2. Such adjustment is slight in the direction of the length of the sleeves, and the holes 35,36,- are easily made large enough so that they will not be carried past A cap 37, closes the outer end of the inner sleeve 29, having a vent 38, so as to not unduly restrict movement of the piston 29, and yet secure a cushioning of the same to prevent its pulsation under the suction of the.
motor. Jam rings 39,40, upon the inner and outer sleeves 29,22, respectively, serve to lock them in place when adjusted.
I have shown depending from the cover 11, into the vaporizing chamber, a flaring funnel-like air guide 41, whichhas its contracted end closely around the end of the. outer sleeve 22, which projects into the vaporizing chamber. Downwardly contracting frusto-conical screens 42, 42, are also shown arranged in the lower part of the throttle tube 10, to aiford evaporating surface for the gasolene, and, lastly, at about the level of the lower part of the throttle port 16, is a substantially horizontal partition 43, with a crescent-shaped recess 44,'in the edge thereof adjacent to the said throttle port. This partition'may be, employed to divide the suction of the motor tooperate both on the gasolene supply at the bottom and the auxiliary air supply at the top, of
the vaporizer, and in any desired propor- 7a tion.
In operation, the aininlet valve having been suitably adjusted, it will be seen that with thethrottleopen only just enough to keep the motor, running, as shown in Fig. ,5, the air-inletat the-bottom of the vaporizer is,open so as to admit air, and obviously at this time there is not enough suction to.
operate the inlet valve at the top of the-.-
vaporiz-ler. As the throttle is .opened far-'85 ther, the auxiliary inlet at the bottom of the vaporizer is closed, and the said valve at the top comes into play automatically. urithermore, since the said-valve operates by the suction, regardless of'the throttle position, it will be understood that the auxiliary air supply may. diminish without any clos ing of the throttle, as for instance when an automobile encounters a hill orthe load upon a.mot'or is otherwise increased. The function of my auxiliary 'air inlet at the bottom of the throttle tube is to vary the air inlet' independently of the automatic valve, or at such times" as the said/automatic, valve is j not in operation, as for instance whenthe -motor is running with the throttle nearly closed and there is not enough suction from the ex .gineto operate the automatic. valve. Under these conditions, the mixture may be.
too rich, as only minimum power iswanted,fl
and the simplest way to secure a weaker mixture is by increasing the air inlet at the bottom of the throttle. tube, and thus both di- 'luting the gasolene fed and also'reducing the feed by reducing the suction on it. This -result is accomplished by the means I have shown and described, viz.,auxiliary' air inlet means adapted to open as the suction of the engine decreases and to close as the suction v of the engine increases. lVhen the throttle is nearly closed, the auxiliary. air inlet isopening and thereby reducing the gasolene feed suctio as well as diluting the mixture. When the t1 'tle is opened again, the auxiliary air inlet closes, thus giving the maximum gasolene feed, and the usual or upper auxiliary air valve is operated by the en the suction to regulate the supply of air to the mixture.
While the detail mechanical construction of my invention can be varied, 'I' prefer a construction such as I have shown whichcan be applied to zmany carbureters already in use by plyiiforming a central screw threaded opening in the top, and recessing itsbedgeto provide for turning the throttle tu e.
Having thus described the invention what I claim as new is:
1. In a carbureter, a vaporizing chamber casing having a. lateral throttle opening, a bottom central aperture and an'auxiliary air inlet, a rotatable throttle tube fitting said casing and having an extension fitting the bottom aperture, said tube'having ports one adapted to turn into. coincidence with the sleeve, a valve for sai auxiliary air inlet as the other passes out of registration with the throttle opening, a cover for the vaporizing chamber casing provided with air inlet means adapted to be automatically operated'by suction throu h the throttle, and a gasolene feed tube in t e said throttle tube extension providing a surrounding air space.
2. In a carbureter, a vaporizing chamber casing having a lateral throttle opening and a lower auxiliary air inlet, a throttle tube fitting said casing and having ports one adapted to turn into coincidence with the auxiliary air inlet as the other passes out of registration with the throttle opening, a cover for the-casing segmentally recessed or cut away at its periphery to expose the upper edge of the throttle tube, handle means upon said exposed portion of the throttle tube for turning the same, air inlet means upon the said cover adapted to be 0 erated by suction through the throttle, an gasolene feed means.
3. 'IIhe' combination with a carbureter body portion having a throttle and gasolene feed means, of a sleeve mounted in said body portion and being interiorly threaded and forming at its inner end a valve seat, an inner sleeve screwin within said outer valve seat having a stem provided with a head slidably fittin the inner sleeve, and a spring sup ortefi at one end on said inner sleeve and a apted to enga c said valve to seat the same, said sleeves firming an air inlet to the carbureter controlled by said valve.
4. The combination with a carbureter body portion having a. throttle and gasolene feed means, of a sleeve mounted in said body portion and being interiorly threaded and forming at its inner end a va e seat, an inner sleeve screwing within said outer sleeve, a valve for said valve seat having a stem provided with a piston head fitting the inner sleeve, a cap upon the end of said inner sleeve adapted to confine the air and form a cushion for said piston, and a spring sup orted at one end on said inner sleeve and a apted to engage said valve to seat the same, said inner and outer sleeves having between the said valve and its piston head apertures for the admission of air. a
5. The, combination with a carbureter body portion having a throttle and gasolene feed means, of a sleeve mounted in said body portion and being interiorly threaded and forming at its inner end a valve seat, an inner sleeve screwing within said outer sleeve, a valve for said valve seat having a stem provided with a piston head fitting the inner sleeve, a cap upon the end of said inner sleeve adapted to confine the air and form a cushion for said piston, and a spring supported at one end on said inner sleeve and adapted to engage said valve to seat the same, the said outer and inner sleeves having between the piston and the carbureter ody portion circumferential series of holes intheir walls, unequal innumber, and some of which always register.
6. The combination with a carbureter body portion having a throttle and gasolene feed means, of a sleeve mounted in said body portion and being interiorly threaded and forming at its inner end a valve seat, an inner sleeve screwing within said outer seat, a valve for said valve seat havin 'a stem provided with a head slidably fitting the inner sleeve, said sleeves formin an air inlet to the carbureter controlled y said valve, and springs one within the other surrounding the valve stem between the said spring seat and valve stem head, one of said other. I
7. A carbureter having a casing with a main bottom air inlet, an auxiliary bottom .air port and a lateral throttle opening, a throttle tube rotatably disposed in the easing and provided with a segmental slot in its bottom adapted to cooperate with the said auxiliary air port and also with a side opening adapted to coincide with the lateral port of the casing, said slot ada ted to move into coincidence with the auxi iary air inlet as the side opening of thethrottle tube moves out of registration with the throttle opening of the casing and vice versa, means for feeding gasolene into the body of the carbureter through said main bottom opening, and an automaticallyoperating auxilia valve arranged on the carbureter to admlt from said chamber, a'throttle for said discharge, and means for restricting the said mechanically operated auxiliary air inlet by opening of the dischar e and opening said mechanically o crate auxiliary air inlet by restricting o the discharge.
air to the latter and controllable solely b v sleeve and forming at its inner end a spring springs being heavier and-shorter than the air to said chamber, a discharge leading 9. In a carbureter, the combination with through the carbureter increases, and means a vaporizing chamber having a main air for restricting the other auxiliary air inlet inlet, gasolene feed means, and a throttle by opening of the throttle.
controlling the discharge from said chamber, JOHN R. PRICE. 5 of two auxiliary air inlets to said chamber Witnesses:
independent of each other, one of said inlets ETHEL B. REED,
adapted to open as the suction of the motor E F. C. CHRISTIANSEN.