US651230A - Valve mechanism. - Google Patents

Description

T. A. BRYAN. VALVE MECHANISM.

(Application filed Apr. 1, 1895.)

Patented June 5, I900;

(No Model.)

. ammo/14,1201

I m w, 61m

UNITED STATES PATENT OFFICE.

THOMAS A. BRYAN, OF BALTIMORE, MARYLAND.

VAL VE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 651,230, dated'J'iine 5, 1900.

Application filed April 1, 1895. Serial No. 544,080. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS A. BRYAN,

. of Baltimore city, in the State of Maryland,

have invented certain new and useful Improvements in Valve Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in valves for the burners of gas-stoves,

The invention consists in certain novel features of construction and combinations and arrangements of parts, as hereinafterset forth, and pointed out in the claim.

The accompanying drawing represents a sectional view of avalve mechanism embodying myimprovements and showing the application of the same to a burner.

The casing of my improved valve mechanism comprises two arms A B, disposed at right angles to each other and each having a longitudinal bore, constituting a chamber,

which terminate, respectively, in valve-seats a b, with contracted outlets a b, the walls of said valve-seats being made conical for the accommodation of the pointed ends of needlevalves A B, which cooperate therewith. The outer end of the arm A of the casing is provided with a cap 0, havinga hole for the passage of the needle-valve A, and the latteris provided with screw-threads o adapted to mesh with similar threads a made in the bore of the arm A of the casing. The needlevalve B is adapted to project beyond the lower end of the arm B of'the casing andin its lower end is made with a slot 11 for the reception of a screw-driver or key. The valve B is also provided with screw-threads b adapted to mesh with threads I) on a sleeve blet' projects for the attachment of the service-'pipe.

From the construction and arrangement of parts above described it will be seen that the bore of the arm B communicates with the bore of the arm A and that the main supply of gas will enter the bore of the arm A through the inlet h and then pass through the outlet a into the bore of the arm B, the admission of the gas to the bore of the arm B being controlled by the valve A. From the bore or chamber of the arm B the gas will pass through the outlet 19' to the burner; but the quantity and pressure of the gas as it passes through said outlet 6 will be regulated by means of the valve B. The valve B can be set or adjusted for a certain pressure of gas to the burner and permitted to remain so set or adjusted indefinitely, the starting and stopping of the supply of gas being then controlled entirely by means of the valve A. The constant supply of gas in the chamberB will tend to cause a steady exit of the gas from said chamber to the burner; but if this chamber were connected directly with the main the fluctuations of pressurein the latter would be transmitted through the chamber and cause unsteady feed of gas to the burner, resulting in the imperfect operation of the latter. To avoid such fluctuations of pressure in the main being transmitted through the chamber B and ultimately to the burner, I have provided the enlarged chamber A, which is connected directly with the main, and the accumulated gas in this chamber flows directly into the chamber which supplies the burner through a contracted outlet.

Thus the fluctuations of pressure in the main are compensated for or absorbed by the body of gas in the enlarged chamber A and the gas passes from said chamber through the contracted outlet at a into the chamber B at or nearly at a uniform pressure. Any slight fluctuations, however, in pressure of the gas entering the chamber B will be compensated for by the body of gas in the latter chamber and the uniformity of pressure of gas as it passes to the burner will be insured. In other words, the chamber A, with its contracted outlet, serves as a compensatory means for effecting the absorption of fluctu ations of pressure in the main, and the chamber 13, with its contracted outlet, serves to prevent fluctuations of pressure of gas as it passes to the point of consumption.

'My improvements are exceedingly simple in construction, are applicable to any gasburner, can be cheaply manufactured, and are effectual in all respects in the performance of their functions.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

In a valve mechanism, the combination of a chamber having a contracted outlet to supply gas therefrom toa burner, avalve to control the passage of gas through said outlet, an enlarged chamber having a contracted outing witnesses.

THOMAS A. BRYAN.

Witnesses:

E. J. GREEN, R. LEE SLADE.

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