US1023470A - Carbureter. - Google Patents

Description

P. UNDERWOOD.

R. S. HILL @z 0.

GARBURETBR.

' .APPLIUATIOH FILED FEB. 28, 1910.

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United.

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but the level of the gasolene in said chamber will be substantially uniform at all times.

We have provided means for automatically controlling the flow of air through the carbureter as follows: Mounted within the carburetor above the gasolene distributer is a plate 25 having a comparatively large. opening 26 at its center. This plate is an ranged to slide vertically on a guide 27 which passes through an opening in the plate as shown in Fig. 1. Attached to the plate 25 is an arm 28 extended downwardly and pivoted to a lever 29, which lever is fulcrumed to a support 30. Attached to the other end of the lever is an arm 31, which arm extends upwardly and supports a secend plate 32. This latter plate is of smaller diameter than the upper one and is provided with an opening 33 of smaller diameter than the opening 26. The plate 32 is preferably provided with guides 34 to extend up through the opening 26 and to hold said plates exactly in line. A guide 35 is pr0- vided for the plate 32 which guide-is secured to the carbureter cylinder. We have also provided an extensible coil spring 36 designed to press upwardly upon the .plate 32 to yieldingly hold it against the plate 25. WVe have provided means for adjusting-the lower end of the pipe 16 relative to the gasolene receptacle so that the level of the gasolene in the chamber 14 may bekeptin line with the gasolene distributer within the carbureter as follows: On the side of the receptacle 14 is a screw threaded sleeve 37 and inserted in said sleeve is a screw threaded rod 38 which rod is rotatably mounted in a collar 39 fitted to the pipe 16 so that the rotation of the rod will raise or lower the pipe relative to the receptacle.

In practical operation and assuming that the gasolene is being fed to the gasolene distributor in a uniform manner ready to be taken up by the air passing adjacent to it and assuming furtherthat only a comparatively slight current of air is passing through the :arluiretcr then all of the air will be deflected by the plates 25 and 32 and will be compelled to pass close to the edges of the gasolcnc distributor. Assuming further that the engine with which the carlnjireter is being used produces strong suction then an upward pressure will he created upon the large plate 25 which will cause it to move upwardly. The lever 29 will operate to then more the plate 32 downwardly so that the said plates will assume the positions shown in Fig. 4. When in this position the same quantity of air will be made to pass' close to the distributor through the opening in the lower plate but the major portion oi the air will pass outside of the lower plate and. be deflected inwardly toward the opening of the upper plate so that it will not come close to the distributcr. In this way tilt mixture is made substantially uniform under all conditions for the reason that when the suction of air through the carbureter is comparatively weak it is necessary to bring all of the air close to the gasolene distributor in order to get the proper mixture, but when the suction of air through the carburetor is extremely rapid the gasolene is taken up much more readily by the air and if all of the air were permitted to pass close to the gasolcne the proportion of gasolene and air would be varied; that is to say, there would be too muchgasolene in proportion to the quantity of air. Hence by means of the moving plates we' have provided for automatically regulating the mixture so that it will operate eiliciently in connection with the engine with which the carbureter is used both when the engine is running extremely slow and when running extremely fast.

' lVe claim as our invention:

1. In a carburetor, the combination of a gasolene distributor, meanstor supplying gasolene to it, two plates zujljacentto the distributor, each having an opening through its central portion and means for jointly moving said plates toward and from each other, the lower plate bcing of smaller diameter than the upper one so that air may pass around the sides of it and through the opening in. the upper plate when the plates are separated.

2. In a carburcter, the combination of a gasolene distributor, means for supplying gasolene to it, two plates adjacent to the distributor, each having an opening through its central portion, means for jointly moving said plates toward and from each other, the lower plate being of smaller diameter than the upper one so that air may pass around the sides of it and through the openingin the upper plate when the plates are separated, and means for automatically" moving said plates upon the pressure of air flowing through the carbureter and engaging the upperplate.

3. In a carburetor, the combination of a gasolene distributor, means for supplying gasolenc to it, two plates adjacent to the distributer, each having an opening through its central portion, meansfor jointly moving said plates toward and from each. other, the lower plate being of smaller diameter than the upper one so that air may pass around the sides of it and through the open-- ing in the upper plate when the plates are separated, means tor automatically moving said plates upon the pressure of air flowing through the carburetor and engaging the upper plate, and a spring for normallyholth. iiig the plates in position adjacent to each other. i

a. In a carburetor, the combination of a gasolene distrihutcr, means for supplying gasolene to it, a plate above the gasolene chstrlhuter hovlng an openlng 111 Its central portlon and hevmg 1ts sldes fitted close to the interior of the earbureter a second plate below it of smaller diameter and having an opening through its center surrounding the gasolene clistributer, guides fixed to the lower plate and extended upwardly through the opening in the upper plate, arms fixed to both plates and extended clownwertly, a lever fulcrumed at its central portion, and [ill'OUZd to said arms, said parts being so nrrzu'lged that when the plates are adjacent to each other all of the air passing through the carburetor Will pass through the open ing in the lower plate and close to the gasolene distributer and when the plates are separated a portion of the air will flow through the spaces between the plates;

Des Moines, Iowa, Feb. 22, 1910.

RAYMUND S: HILL.

OLIVER P, UNDERWOOD. Withesses:

' htlAR WALLACE,

A. G. HAGUE.

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