US1494176A - Carburetor valve - Google Patents

Description

May 13, 1924., 1,494,176-

CVC. LITTLE CARBURETOR VALVE Filed March 5, 1919 FIGURE 2 INVENTOR ATTORNEY because if member Patented May 13, i924,

CHARLES C. LITTLfiOF SAN J 05E, UALIFORNIA.

CARBURETOR VALVE.

Application filed March 8, 1919. Serial No. 280,380.

To all whom it may concern.

Be it known that I, CHARLES C. LI'rrLE, a citizen of the United States, and resident of San Jose, in the county of Santa Clara and State of California, have invented certain new' and useful Improvements in Carburetor Valves, of which the following, is a specification.

My invention relates to carburetors and it is the object of my invention to provide a simple means for accurately the action of that t pe of carburetor air valv which has one fixed end and'one movable end such as a reed valve.

In the drawing Figure 1 is a vertical section of an auxiliary air valve and mounting with one form of my controlling device in position there- Figure 2 is a plan view of the valve structure in Figural.

Referring more particularly to the drawing, 1 indicates a portion of a carburetor body provided with a port 2 having a valve 3 seated thereon, the valve 3 being mounted on a resilient member 4 secured to body portion 1 as at 5.

At 6 I show a simple form of my invention consisting of a controlling member fixedly secured to body portion 1 at 5 and extending outwardly over member 4. and curving away therefrom to provide a curved surfac 7. In the illustration of my invention here presented the surface 7 is pro vided with a plurality of spaced contact points 8.

At 9 is shown a cam mounted on shaft 10 and at the back of and near the outer end of member 6. Shaft 10 is revolubly mounted in body portion 1 and is provided with an operating arm 11.

In operation the valve 3 is raised from its seat on port 2 to permit the passage of air therethrough in the usual manner, but as the suction lifting valve 3 increases the resistance thereto is progressively increased by contact ofmember 4 with the successive contact points 8. Each of these points of contact has the effect of making member 4 shorter and stiffer, the last point forming a positive stop and preventing the valve from opening too far because of its inertia under sudden increase of air suction through port 2. These contact points also prevent fluttering of the valve 4 vibrates on one point all engine speeds,

controlling its contact with the following point interferes with the eriod of vibration.

By means 0 this construction the resistance to the passa e of air through ort 2 is so proportioned to the suction us to the engine pistons that the proper proportion of air and fuel is secured at any and the primary air supply being adjusted for high, medium or low speed ran es. 7

The adwstment through cam 9 provides a means whereby the member 6 may be set for any given range of engine speeds, thereby making it possible to secure a properly proportioned explosive mixture without a justment of the primary air supply.

It is obvious that member 6 must be flexed by cam 9 to a certain degree at each contact point. This I accomplish by varying its width as at 12 or its thickness as at 13, or both.

It is understood, of course, that the controlling member embodied in this invention is applicable to any form of resilient air valve or member that has one free end and one fixed end, and that changes in form, proportions, construction and method" of operation may be made within the scope of the appended claims.

I claim 1. In combination, a resilient valve having one fixed end and one movable end, and a plurality of relatively spaced stops arranged at progressively increasing distances from the back thereof and beginning at a point adjacent the fixed end thereof the relative positions of the successively arranged sto 5 being such as to progressively reduce t e resiliency of said valve in proportion to the increase in air suction lifting the same.

2. In combination, a resilient valve having one portion fixed and one end portion free, and a flexible controlling member fixed at one portion and having a free end portion overlying the fre end portion of the valve in spaced relation thereto, and means engageable with the freeend portion of the controllin member for flexing the same toward an from the valve, l

3. In combination, a resilient valve having one fixed end and one movable end, and a controlling member positioned at the back thereof and curving awa a point adjacent the fixe end thereof, and means for flexing said controlling member. 4. In combination, a resilient valve havice therefrom: from ing one fixed and and one movable end, and

a controlling member positioned at the back thereof and curving away therefrom from a point adjacent the fixed end thereof, said member having a reduced cross-sectional area in its portion of greatest curvature,

{5nd means for flexing said controlling mem- 5. In combination, an air valve seat, a resilient valve normally held in contact therewith and having a fixed end spaced a distance therefrom, and a plurality of definite stops arranged at progressively increasing distances from the back thereof and beginning at a point adjacent the fixed end thereof, said stops providing definite fulcrum points for the resilient valve to pro gressively reduce the resiliency of said valve in proportion to the increase in air suction liftin the same.

6. In combination with a fluid passage of a carburetor, an auxiliary air chamber communicating therewith and formed with an inlet opening, a resilient valve for said than the valve and cooperating with the valve to reduce the resiliency thereof proportionately to the movement of the valve away from said 0 ening.

7. In 'com ination, a resilient valve having one end fixed and the other end movable, a controlling member positioned at the back thereof and curving away therefrom from a point adjacent the fixed end thereof, said controlling member having definitely arranged and relatively spaced fulcrum points for successive engagement by the valve, and means for adjusting said controlling member and thereby the position of I the fulcrum points.

8.A resilient valve fixed at one end and having its opposite end free, a resilient controlling mern er, stiffer than the valve and fixed at one end and having its opposite end free andoverlying the free end of the valve spaced therefrom, andmeans for flexin the controlling member relative to the va ve.

Executed this 24th day of February, 1919.

inlet opening, and a resilient controlling member having a lesser degree of resiliency CHARLES C. LITTLE.

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