US868265A - Carbureter for internal-combustion engines. - Google Patents

Description

7 0 9 1 5 1 1 G .0 m T N E T A P GARB'URETBR FOR INTERNAL COMBUSTION ENGINES.

APPLIOATIOK FILED AUG. 25, 1905.

considerably, and to compensatefor this it has been v UNITED STATES PATENT OFFICE:

EDWARD V; HARTFORD, OF. NEW YORK, N. Y.

cannunn'mn son -m'rnmmn-oomsus'rron ENGINES.

Specification of Letters Patent.

Patented Oct. 15, 1907.

Application at August 25,1905. seatin 275,788.

To'all whom it may concern: Be it known that I, Enwann V. HARTFORD, a citizen of the United States, residing in the city, county, and. State of New York, have invented certain new and usual to vary the secondary air supply and automatic means have been provided for this purpose. 'I have found, however, that in a device of this type, especially when used in connection with an engi'ne of high speed, the parts reciprocate so rapidly as to interfere with their proper positive action and l have thereforeprovided my moving parts with a device for controlling the movement and insuring their positive and effective operation.

In the drawings illustrating one form of my invention Figure l is an elevation of my carbureter in section, showing the parts in their normal position. Fig. 2 is a detailed section of a modified form of valve controlling device.'

In the construction shown in Fig. l the numeral 1 indicates the shell or case of the mixing chamber; 2 the supply' pipe for the hydro-carbon mixture and 3 the outlet leading to the engine. The casing 1 ispreferably cylindrical and entirely closed except at the bottom where it is supplied with a series ofperforations 4, as shown. 'Within the said shell is located an annular valve .5, upon which is fitted a spider 6, secured to the stem 7. The valve 5 isfof sufficient area to cover -tl1e openings 4 when the valve is in the position shown,

and it is retained in this position by a spring 8 on the stem 7, operating against the upper portion of the case and the spider. The upper end of the shaft 7 .passes through a stuffing box at 9 at the. upper end of the case I l l is created in the cylinder and, communicating with the mixing chamber of the carburetendra'ws a charge I into the engine. This vacuum, however, lifts the valve 5 against the operation of the spring and admits the proper amount of air through the apertures 4, the hydro-carbon mixture being fed through the pipe 2 in the usual manner. As the speed of the engine increases the vacuum created by its up-stroke becomes greater and this serves to lift the valve high-er and thusladniits a correspondingly larger proportion of air intorthe chamber. At highspeed the vibration of the valve and rod will be found to be so rapid as to prevent its complete response to the movements desired, bu t loy means of the frictional retarding means shown, ;i; his

excessive vibration -is completely controlled and the parts caused to respond in strict accordance'with the desired operation. The supply of hydro-carbon mix- -ture may be regulated by a suitable plug in he feed of a carburetor. A dash-pot, however, is not thbroughly effective for the purpose, as it does not act properly under all conditions. For instance, when the engine is running at high speed and the strokes are quick and hard, a dash-pot offers an almost unyielding resistance to the movement of the valve. That is to say, a quick, upward impetus to the carburetor valve would be checked by a dash-pot, whereas a slow, gentle movement would be permitted. The frictional means or devices which I employ are not affected by fluid compression and expansion, such as affects the action of a dash-pot, and my device, therefore, acts with the same'resistance under rapid movements as under slow movements. 1 am aware that an accidental and innnaterialamount of friction occurs between the piston and cylinder of a dah-pot or similar device, but'this friction is modified and almost entirely overcome by the c mpression and expansion of fluid on opposite sides of the piston in the dash-pot. My device provides pure friction which is not affected by other conditions, such as the compression of air and the like, and by the expressions frictional means or frictional devices in the claims, 1 desire to limit myself to means or devices for producing pure, intentional friction, not affected by fluid cola? pression or expansion.

It is obvious that many modifications and changes may be made from the exact constructions shown and described, without departing from the spirit of my invention, and I do not intend to limit myself to the specific form shown, but

Whr'tt I claim and desire to secure by Letters Patent 1. A carlmre ter having a valve and automatic and frlc-. tional means for regulating the action of the valve.

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