US897285A - Automatic valve. - Google Patents

Description

PATENTED SEPT. 1 1908.

A. J. GEEENAWAY.

AUTOMATIC VALVE. APPLIGATION FILED APR. s, 1902.

UNITED STATES AUTOMATIC VALVE.

To all whom it may concern:

Be it known that I, ARTHUR J. GREENA- WAY, citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Automatic Valves, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

y invention relates to an improvement in automatic valves, the object being to provide means in a steam heating system, either vacuum or ressure,whereby a radiator or other app the, water of condensation, permitting it to flow or be drawn therefrom, and promptly closing when the same is exhausted.

It is a well known fact in connection with vacuum systems of steam heating :a system specially designed to use the exhaust from an engme,that a vacuum pump is installed in order to circulate the steam through the radiating units and with practically no back pressure on'the engine,the returns from the radiators being connected with the suction of the pump whereby the water of condensation is removed therefrom.

As before indicated the object of this invention is to produce a valve which will permit of the water being drained from the radiator and which will automatically close the exhaust opening from the valve the instant steam reaches the same. I am aware of the fact that numerous valves have been devised employing various means to accomplish this result. This invention, however, differs from these inasmuch as it is an-entirely metallic device, simple in construction, and adapted to the purpose whether-operating under vacuum or pressure.

. With the foregoing in view the invention consists in certain features of construction and in a combination of parts described in the following specification and more particularly pointed out in the claims.

In the drawings: Figure 1 is a side elevation. Fig. 2 is a central vertical section of the same. Fig. 3 is a detail View of the valve and its stem, with parts in section.

Referring now to the letters of reference spread upon the drawings: A denotes the lower portion of the valve body and B a cap or hood portion secured thereto. The lower Specification of Letters Patent. Application filed April s, 1908. Serial No. 424,871.

lance may be relieved of Patented Sept. 1, 1908.

portion A is cup-shaped to serve as a grit or scale receiving chamber, its vwall being formed with a discharge channel a under the control of the valve 0.

D is a thermostatic bar preferably U-shaped in form and composed of two dissimilar metals united together in any suitable manner, but preferably by riveting the parts together as shown. One end of the bar is rigidly attached to the wall of the body por tion A, the other being free to moveupon the expansion and contraction of the metal. Supported in the free end of the bar D is a pro ecting adjustable stem E, to which is secured,by a ball and socket connection, the disk valve C designed to-close the port a through the action of the thermostatic bar.

F is a union whereby the valve body may be secured to the radiator in the usual manner and A is the internally'screw threaded hub of the valve body by which the vacuum pipie (not shown) may be secured tothe valve bo y.

Having indicated the several parts by reference letters, theoperation of the device will be readily understood. The valve disk 0 is so adjusted with reference to its seat that it stands normally open. The steam on entering the valve chamber through the connection F, encounters the thermostatic bar D and instantly expands the metal thereby forcing the valve 0 to its seat and thus closing the discharge port a. Upon condensation collecting in the valve chamber the thermostatic bar is caused to contract, which action lifts the valve from its seat whereby the condensation is from which it flows the action of a vacuum the chamber is relieved from the water of condensation, the steam will again encounter the thermostatic bar forcing the valve C to its seat, it will remain closed until the action just described is repeated.

or is otherwise drawn by pump. As soon as released into the port a Having thus described my invention, what I claim is 1. In a valve of the class described having a discharge port, a thermostatic inverted U-shaped bar composed of dissimilar metals riveted together, one of the legs of said bar being longer than the other with the shorter leg free to move under the expansion and contraction of the parts, a screw threaded bolt or rod set transversely through the shorter leg of said bar and adapted for adjustment, a valve disk, a ball and socket conthe shorter leg of adapted for adjustment, and a valve disk,

static bar nection between the valve disk and rod, and

means for securin the longer leg of the thermostatic bar fixe y to the valve casing.

2. In a valve of the class described includan'inlet and a discharge port a thermoone of the e s of said mg static U-shaped bar, bar being longer than leg being fixed to the valve casing and the shorter leg being free to move under the expansion and contraction of the parts, a screw threaded bolt or rod set transversely through said thermostatic barand connected to said shorter leg of the thermoformovement into and out of engagement with the port of the valve, the onger leg of the thermostatic bar having an o ermit of the passage of said pening to ed bolt therethrough when the screw threa rivete the other, t e longer shorter leg is contracted toward the longer 3. In a valve of the class described, having an inlet, and a discharge port a thermostatic,

ARTHUR J. GREENAWAY.

Witnesses:

GRAoE E. WYNKOOP, SAMUEL E. THOMAS.

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