US1744580A - Carburetor - Google Patents

Description

Jan' 2l, 1930- I H. scHlsKE: rv"lu-,744,558.0 "s

, cARBURx-jwon Filed Jan. 6, 1926 llllll Patented Jan. 21, 1930 .UNITED STATES HUBERT SCHISKE, OF MUNICH, GERMANY CARBURETOR Application filed January 6, 1926, Sera1 No.

Carburetors wherein the float chamber is disposed laterally of the mixing chamber commonly have the defect that the mixture is aEected when the carburetor is inclined, and

5 this defect is not removed by using an injector disposed transversely of the mixing chamber.

The object of this invention is to remove this defect.

According to this invention the mixing chamber is fed with mixture by a horizontal or substantially horizontal mixing tube, which is open for inspiration of air at its outer end, and to which is joined a substantially vertical tube through which fuel from the float chamber is injected into the mixing tube. The mixing tube, or a part thereof is arranged within a channel shaped depression in the iioat in proximity to the normal fuel level in the float chamber. The vertical tube may be disposed at or near the vertical axis of the float chamber, and may pass through a hole in the iioat. At its intake end the mixing tube may have a constricted orifice, through which air is sucked at a high velocity, the junction of the mixing tube with the vertical tube being close to this orifice. The intake end of the mixing tube need not be within the float chamber; the tube may have a suitable air intake orifice outside that chamber, and pass through the float chamber to the mixing chamber, or it may have one intake orifice outside the float chamber and another air intake orifice within the float chamber. If there is more than one intake orifice there may be a separate vertical tube for each of them. The mixing tube may be in alignment with the axis of the throttle valve, and may be tted upon one end of the throttle valve spindle, or abut against that end, the mixture passing through passages or slots, or the spindle may be hollow for conducting the mixture to a passage or passages through which it passes into the mixing chamber.

Several forms of the invention are shown in the accompanying drawing, in which Fig. l is a vertical section of one form, and Fig. 2 a. section on the line A-B of Fig. l; Fig. 3 is a view similar to Fig. l of a modified form;

79,515, and in Germany october 17, 1925.

Fig. t is a vert-ical sectional view, and Fig. 5 a top plan view of a second modified form.

In the drawing l designates the mixing chamber, 2 the lioat chamber, 3 the float, and l the vertical tube, which is oined at the top to a perforated portion of the horizontal mixing tube 5, the latter being fitted to the hollow spindle l1 of the throttle valve 6, which has a duct l0 in communication with the interior of the hollow spindle, for emission of the mixture. The float has a central, vertical passage for the vertical tube, and has at the top a channel 9 accommodating the tube 5. 'Ihe end of the tube 5 within this channel 9 has a small air intake orifice, to which is joined a flared mouth piece or funnel 8.

'Ihe modified form shown in Figure 3 is like the form of Figure l, except that the air intake 8a projects outside the iioat chamber.

In the form of Figures 4t and 5 there is provided a second mixing tubes 5a with an air intake 8b within the float chamber, in addition to the mixing tube 5 and the air intake 8a projecting outside the float chamber. Both tubes 5 and 5n are further disposed to discharge directly into the mixing chamber.

Suction produced by the ,engine in the mixing chamber 1 causes air to be drawn with high velocity through the intake orifice of the mixing tube, with the result that fuel is drawn into that tube from the vertical tube, and the fuel is carried by the air to the mixing chamber.

If the apparatus is constructed with a mixing tube having an intake orifice outside the float chamber the carburetor may be operated with compression feed, that is to say compressed air or mixture of compressed air and fuel may be fed into the mixing tube.

Vhat I claim as my invention and desire to secure by Letters Patent of the United States is 1. In a carburetor having a mixing cha-mber, a float chamber laterally thereof and an upright fuel tube in the fioat chamber, the combination with a float having a channellike depression in a face thereof, of a mixing tube directly in said depression and arranged in close proximity to and above the normal fuel level in the float chamber, said mixing tube being provided with an air entra-nce and a. fuel inlet, the latter cOnimunicating with the said fuel tube.

2. In a carburetor of the character described, the combination With the elements claimed in claim 1, in which the inlet for the mixing tube is outside of the float chamber.

In Witness whereof I have signed this specification.

HUBERT SCHISKE.

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