US921867A - Relief-valve mechanism. - Google Patents

Description

J. L. MOYER.

RELIEF VALVE MEUHANISM. APPLIOATION FILED NOV. 2, 190a,

Patented May 18, 1909.

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ATTORNEY.

UNITED STATES PATENT UFFiQE.

JOHN L. MOYER, OF STRAFFORD, PENNSYLVANIA.

RELIEF-VALVE MECHANISM.

Specification of Letters Patent.

Application filed November 2, 1908.

Patented May 18, 1909.

Serial N0. 460,670.

To all whom 'it may concern:

Be it known that 1, JOHN L. Moran, a citizen of the United States, residing at Strafford, in the'county of Chester and State of Pennsylvania, have invented certain Improvements in Relief-Valve Mechanism.

My invention is a valve mechanism designed primarily for the automatic relief of air and water from steam heating systems, where it is necessary to satisfactory operation that the water of condensation be withdrawn and the air collected be removed. In valves heretofore used for these purposes it has been customary to have vents for the escape of air but such vents have been found ineffective and unsatisfactory because of the necessity of making them so large originally, to avoid as far as possible their closure by sediment, rust and the like, that initially there is a wasteful escape of steam and finally they become clogged so that the air cannot escape automatically, with the result that manual relief must be provided.

It is a'leading object of my invention to provide for the relief of the water and air by improved means which will automatically maintain the air vent open, in clean condition, and consequently permit the use of a vent so small as to prevent the escape of steam therethrough or reduce it to a minimum, whether the system operates above or below atmospheric pressure.

It is a further object of my improvements to provide means for trapping and periodically withdrawing sediment or other solid matter that may be collected, so that interference with the automatic relief mechanism may be avoided and the system relieved of obstruction.

The accompanying drawing is a sectional elevation representing valve mechanism embodying my invention.

As represented in the drawing, the mechanism comprises a casing 1 having the inlet 2 and the outlet 3 with the diaphragm 4 fixed between them, the casing having the cap 5 screwed into the top thereof. A port 6 is provided in the diaphragm 4 and fixed to a float 7 within the casing is a valve in the form of the puppet 8 adapted to control the port, the float and puppet having a tube or tubular passage 9 extending therethrough in line with the port. A movable diaphragm 10 has its periphery clamped to the body of the casing 1 by the cap 5, the latter having therein the air vent 11,-and fixed to the center of the diaphragm is a rod 12 which extends through the passage 9. A sediment pocket 13, extending below the port 6, has near the bottom thereof the port 14: by which it discharges to the outlet 3, the port being controlled by a valve in the form of the plug 15, which has a squared head 16 for the engagement of a wrench and a threaded shank 17 for engagement within the internally threaded spud 18 on the casing. The mechanism has its inlet 2 connected by the union 19 with a section 20 of the circulating system.

In operation, the respective ports 6 and 14 are normally closed by the puppet 8 and the plug 15, the casing 1 collects air in the system section connected therewith by the inlet 2 and discharges it to the outlet 3 through the passage 9 by way of its slight free space surrounding the rod 12. Condensed water is collected in the trap formed by the extension of the bottom of the easing 1 below the inlet 2 and lifts the float 7 with the puppet 8 to open the port 6 to discharge the bulk of the water in the trap. Sediment is collected in the pocket 13 and is removed by withdrawing the plug 15 and opening its port 14. The diaphragm 10 reciprocates as a consequence of variations of pressure within the system and causes the reciprocation of the rod 12 in the air tube, while the movements of the float reciprocate the tube upon the rod. The consequent rubbing between the tube and the rod keeps their contacting surfaces clean and maintains a free air vent, which has the minimum cross sectional area because its walls are kept smooth and clean.

Having described my invention, 1 claim:

A valve mechanism having a port, a reciprocating valve for controlling said port, a. float fixed to said valve for operating it, said valve and float having a passage therethrough adapted to discharge through said port, disposed in said passage for keeping it clean a rod designed to permit the escape of air and to prevent the flow of a substantial 1908, in the presence of the subscribing Witamount of steam through said passage, and nesses. a diaphragm to which said rod is fixed, said diaphragm being adapted to be reciprocated 5 by changes of pressure thereon. Witnesses:

In Witness whereof I have hereunto set ROBERT JAMES EARLEY, my name this 29th day of October A. D. JAs. G. DENNY, Jr.

JOHN L. MOYER.

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