US1134531A - Carbureter. - Google Patents

Description

F. H. .HEITGERI CARBURETER.

APPLICATION FILED JUNE 8, 1912;

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FRANK H. HEITGER, OF INDIANAPOLIS, INDIANA,v ASSIGNOR TO HEITGER CRBURETOR COMPANY, 0F INDIANAPOLIS, INDIANA, A CORPORATION 0F INDIANA.

CARBUR-ETER.

Application mea June s, 1912.

T0 all whom z't may concern Be it known that I, FRANK H. HEITGER, a. citizen of the United States, residing at Indianapolis, Marion county, and State of Indiana, have invented and discovered certain new and useful Improvementsin Carbureters, of Iwhich the following is a. specification.

My said invention consists in certain improvements in the details of construction of carbureters for internal combustion engines, especially of the class designed for use on motor cycles and automobiles, whereby the valve for controlling the auxiliary air supply to the mixing chamber may be held under a tension adjusted to suit the requirements of the conditions under which the engine is operating,as toatmosphere, temperature, etc., which tension may be quickly and conveniently changed or adjusted to' suit changed conditions, all as will 'be hereinaftermore fully described and claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a side elevation of a carbureter embodying my said invention, Fig. 2 a central vertical section through the top portion thereof, Fig. 3 a Fig. 4 a perspective view showing the regulating valve separately for auxiliary air supply, and Fig. 5 a view showing a modification in the construction.

In said drawings the portions marked A represent the casing or body of the mixing chamber, B the float chamber or gasolene reservoir and C the main or hot air inlet thereto.

The main structure `of the carbureter shown is of the form in common use known as the Heitger carbureter but may be of any approved form or construction and requires no special description except inV so far as it is modified by my present invention.

The casing A contains the mixing chamber, the mixture coming into same in the usual manner through suction tube 25. Said casing is provided with an air cage a for the auxiliary air inlet and a mixture outlet a1.

The auxiliary air inlet through the air cage a is controlled by a valve 10 mounted upon the inner end of a torsional spring 11, the opposite end of said spring being made fast to a rock-shaft 12, which is journaled Specification of Letters Patent.

,formed with projecting top or plan view,

Patented apes, 1era. Serial No. 702,612.

insuitable bearings inthe sides of a hollow lug 17 on the top of casing A.' Said rockshaft projects through the sides of said lug end and has a lever 13 mounted rigidlyon one outside end by which it may be turned. Said lever 13 depends from said shaft 12 and near its lower end engages with a toothed segment 14 on'the adjacent side of casing A. Said segment 14 is points l5 and 16 at its respective ends which serve to limit the swing of said lever 13. The teeth in said segment are of the form best shown in Fig.

and on one 3 and adapted to hold said lever against rany backward movement by the horizontal right- `angular faces Which engage with the rear edge of said lever, while their tapered faces permit said lever to be swung forward by merely pushing from the rear side.

As Will be readily seen the tension of the spring 11 tends to hold valve 10 to its seat against the inner end of air cage a lof said casing A. normally keeping the auxiliary air inlet closed. The spring 11 will yield under any air pressure against lvalve 10 caused by internal suction sufficient to' overcome its tension, permitting said valve to open and..y air from the outside to ,pass in through air cage a to said mixing chamber. By turning lever 13 in a direction to wind up spring 11, its tension is valve is held to its seat under greater pressure while when turned in the opposite direction the springis unwound and its tension decreased, permitting said valve to open under lesser pressure. Thus, where a smaller quantity of air is desired in the mixture, the operator by throwing lever 13 backward increases the tension of the spring and decreases the quantity of air admitted while when a larger quantity is desired the operator withdraws lever 1 3 away from the segment 14' sufficiently to disengage its edge from'the notches therein and swings it forward to secure the tension desired. The square or horizontal front face of the respective notches insures that the lever will be securely held against the internal suction, or vacuum, in the chamber and only moved when forcibly released as above described. A lug 18 is cast on the interior of casing A in position` to limit the inward swing of valve 10 at the point desired.

In Fig. 5 I have illustrated a modification by which the lever 13 may be operated from low lug extending outwardly any point, as the front seat of an automobile, through the medium of a connecting rod 20, pivoted thereto and extending to an operating lever or handle conveniently located adjacent to the point desired. A set-screw l21 is arranged to limit the normal low tension of thespring and the backward movement of lever 13 will be held by the locking of said operating lever by any common means, not shown.

Having thus fully described my said invention what l claim as new and desire to secure by Letters Patent is A carbureter comprising a mixing cham ber having an auxiliary air inlet and a holat one side of said air inlet formed with bearings in its sides for a rock shaft, a rock shaft mounted 1n said bearings, a helical spring mounted around said rock shaft within' said hollow` lug vwith its inner end rigidly attached to said rock shaft and its other end projecting i spring with its hundred and twelve.

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to a point beyond the center' of the auxiliary air inlet, a valve composed of rigid material mounted on the extending end of said outer face adapted to bear against the inner edge of said auxiliary air inlet or closing the same, a crank arm mounted on one end of said rock shaft outside of said lug, and means for adjusting said crank arm and securing it in difl'erent adjusted positions, whereby the tension oi' Said spring may be varied during operation to suit the requirements of the carbureter under varying conditions, substantially as set forth. f

ln witness whereof l have hereunto set my hand and seal at indianapolis, indiana, this twenty-first day of FRANK H. l-lEl'lGrER.

llVitnesses:

E. W. BRADFORD,l

A. C. Rien.

May, D. nineteen

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