US1606812A - Carburetor - Google Patents

Description

Nov. 16 1926. 1,606,812

H. scHlsKE CARBURETOR Filed Jan. 6. 19,26

INVENTOR Huraira-r 5CH (5K L BY WAL A ATTORNEY CJD Non. iti, i926.

narrar eric.,

HUBERT SCHISKE, 0F MUNICH, GERMANY.

CARBURETOR.

Application lccl January 6, 1926, Serial No. 79,516, and in Germany October 17, 1925.

rJi`he invention relates to carburetors of the kind in whch afloat controls the fuel inlet valve by means of lever mechanism.

lt is a common experience with such carburetors that difficulties arise when one fuel is substituted for another having a' different specific gravity, because the change of buoyancy causes the liquid level to be changed, so that it is necessary to insert a new float, orchange the length of the inlet valve stem, or make some other more or less difhcult adjustment. rlhe object of this invention is to provide a carburetor with float-actuated mechanism which can in a more simple manner be. adjusted for fuels of different specific gravities. j

To this end means are provided for adjusting or regulating the clearance between the bottom of the tank or a given appropriate liquid level and the lever which is actuated by the float, so that when the specific gravity of the fuel is changed the float can assume the new normal position due to the changed buoyancy without thereby effecting the position of the valve. In combination with the adjusting device for this purpose, the valve seat may be made vertically adjustable, for the purpose of affording a wider range of adjustment.

Three examples of apparatus according to the invention are shown in the accompanying drawing, in which- Figs. l and 2 are vertical sectional views of one form of the invention` with the lever arm which engages the float in different positions; Figs. 3 and 4 are views corresponding, res ectively, with Figs. l and 2 of a modifier form of the invention, and Figs. 5 and 6 are views corresponding, respectively1 with Figs. l and 2 of a still further modilied form of the invention.

Referring first to Figs. 1 and 2, the float a, when lifted, bears against one arm of a double armed lever b. The lever is mounted upon a pivot c supported in a bearing c1", from which pivot the lever can be withdrawn by hand. rIhe other arm of the lever engages between collars bx on the valve ste-m (Z. The arm in Contact with the float has an enlarged end portion e with two curved surfaces f and g at opposite sides of the lever, the curves being segments of circles of different radii. I The curved part f forms on one side of the lever a projection which is substantially larger than the preti-action formed on the opposite side by the curved part g. ln Fig. l the curved surface f is shown in contact with the float a, but by slipping the lever off its pivot, inverting it and thus reversing the curved surfaces f and g, and then replacing the lever the curved surface g is placed in contact with the float, as shown in Fig. 2. rlhis is done when the fuel is changed for a fuel of higher specific gravity7 whosev buoyancy will lift the float through the additional distance equal to the difference between the size of projections andV g. To allow of more precise adjustment for fuels of intermediate specific gravities the valve seat it may be made vertically adjustable. The valvev seat 7L has a friction lit in the fuel inlet nipple a3 and by driving'the seat up or down in thev nipple the desired adjustment is obtained.

In the modification shown in Figs. 3 and 4L the stem d1 of the valve passes through a central passage in the float trl, but in other respects the mechanism is similar to that shown in Fig. l, each of the levers b1 being mounted on a pivot c1 supported in a bearing c1", from which pivot the lever can be withdrawn for inverting it, so that either the curve f1 or the curve g1 of the enlarged part e1 can be placed vin contact with the float. The valve seat h1 may be vertically adjustable in the manner above described.

In the modification shown in Figs. 5 and 6 a double armed lever b2 engaging the valve stem Z2 is mounted on a pvot c2 from which in can be withdrawn, for inverting it. The lever has an eye 2, which engages a stud on the iloat a2, but can be withdrawn fro-m the said stud. The axis of this eye does not pass through the centre line of the lever, Aso

that by inverting the lever from the position in which it is shown the eye is raised or reversed in position and can then, Without affecting the posit-ion of the valve, be reengaged with the stud, with the float raised to a higher level/ due to increased buoyancy of the fuel.

In all forms of the invention, the device includes a conventional. form of float chamber am with a fuel inlet a3 and a fuel outlet @20.

What I claim as my invention and desire to secure by Letters Patent of the United States is l. In a lc'a'rlniretor the combina-tion of a i fuel container, a float in said. tentamen a fuel. inlet valve, a valve actuating lever haw ing an arm in the pat-h of the float, and having reversible ineans for regulating the clearance between the lever in its valve closing position and the bottoin of the container Without altering the operative relation betiveen the lever and the valve.

2. In a carburetor' the combination of a fuel container, a float in said container, a fuel inlet valve, a valve actuating lever having an arin in the path of the float, said arni having surface portions located respectively at different distances from theA axis of said arin, and a support affording a 'uleruni for said lever, capable of supporting said lever in alternative positions imparted to said lever by rotating it about its axis.

3. ln a carburetor the combination ot a fuel container7 a lioat in said Container, a fuel inlet valve, a valve actuating lever hav i ing an arm in the path of the float,` said arin having VatA opposite sides thereof tivo surface vportions located respectively at dil'lerent distances from the axis of the arin, and a pivot for said lever adapted to support saidlever in tivo alternative positions in which either one or the other ot saidl` surtace portions faces the float.

4t. ln a carburetor the combination of a fuel container, a float in said container, a fuel inlet valve, a valve actuating lever having an arni in the path of said float, Said arin having ineans non-symmetrical in relation to its longitudinal aXis for engaging the float, and a support affording a fulcruni, for said lever adapted to support said lever-in (liderent positions imparted to the lever by rotation thereof about said axis.

5. ln a 'carburetor the Combination of a fuel container', a 'float in said container, a fuel inlet valve, al valve actuating lever hav ing an arm in the path of said float, and a support affording` a. fuleruin for said lever7 adapted to support said lever in tivo alternative positions which can be imparted to said lever by rotation thereof about a longitudinal axis, that portion of the. lever arm which contacts with the tloatbeing nonsyinmetrieal with the axis otl the lever arin.

6. The combination claiined in claiin l, together with a vertically adjustable seat for the valve.

ln Witness whereof I have signed this specification. i

' HUBERT SCHlSKE.

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