US417275A - payne - Google Patents

Description

(No Model.

0. H. PAYNE. SAFETY VALVE.

No. 417,275. Patented Dec. 17, 1889 l ographur. Walhingicn. n. c.

UNITED STATES PATENT OFFICE.

CHARLES H. PAYNE, OF TOLEDO, OHIO, ASSIGNOR OF ONE-HALF TO HAMILTON S. 'CORlVIN, OF SAME PLACE.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 417,275, dated December 17, 1889.

Application filed August 13, 1388. Serial No. 282,506. (No model.)

T 0 all whom, it may concern.

Be it known that 1, CHARLES H. PAYNE, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Safety-Valves; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make an d use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

My invention relates to safety-valves, and has for its object to provide means whereby the valve may be revolved while under pressure of steam or other fluid, to grind the same to seat perfectly upon the valve-seat, and also to the reinovability of the valve or valve-seat, whereby either may be removed and a new one substituted in case of any irregular wear or defect, causing leakage between the same.

The invention consists'in certain parts and combination of parts hereinafter described, and pointed out in the claims.

Heretofore in the branch of the art to which my invention relates, in case of the irregular wear upon the valve it has been necessary to draw the fire and remove the parts to gain access to the valve, which must of necessity be removed and ground to fit the seat. In many instances the cause of leakage of the valves is by reason of an uneven surface in the valve seat. This part, being formed integral with the top of the stcanrdoine, requires a removal of the same at great expense and the loss of considerable time in the stoppage of the engine.

It is the object of my invention to not only render it possible to grind the valve and seat by revolution of the valve upon its seat while under steam-pressure, but to provide a removable valve and valve-seat to allow the insertion of a new and perfect valve or valveseat in place of one that may be worn out of true.

In the drawings, Figure 1 is an end view of a boiler with my improved safety-valve connected with the steam-dome. Fig. 2 is a longitudinal vertical section of the steam-dome,

showing my improvements in place. Fig. is a plan view of the valve, showing in dotted lines a square perforation in the valveseat, into which a wrench is inserted for turning the seat into or out of its threaded perforation in the top of the dome.

A designates the boiler; B, the dome, having a top O, upon which is secured a chamber 1) in the usual manner.

E designates a removable valve-seat, having a screw-thread upon its periphery to fit into a correspondingly screw-th readed perforation F in the top of the dome. The valve-seat has a central opening G, of conical shape, upon the upper face and of rectangular form upon the under side, the lower rectangular opening H being for the insertion of a wrench, for the purpose of screwing the valve-seat in place or removing the same when desired.

I designates the valve, having a lower conical face adapted to seat closely upon the valve-seat, and an upper face formed with a boss K, having a rectangular opening K, into which a valve-stem L, having a correspondingly-shaped lower portion, fits. Valve-stem L extends upward through the chamber D, and has a beveled gear M secured upon its upper end, the stem being journaled in the top of chamber D 3 also in a hanger N, attached to the chamber.

0 designates a jam-nut upon stem L, upon which rests a lever P, pivoted at P, and having an adj ust-able weight Q suspended therefrom.

- R designates a lover fulcrumed upon hanger N at R, and engaging upon the under side of nut O, the free end having a rope R" attached thereto in convenient position to be grasped when it is desired to raise the valvestem against the weight to ascertain whether or not the valve is set fast upon the seat.

S designates a shaft journaled in hangerN at right angles to stem L, and provided with a bevel-gear '1, which gears with bevel-gear M upon the valve-stem, the opposite end of the shaft having a pulley T keyed thereon, over which passes a rope T, by which means the shaft may be revolved, and through the beveled gears the valve revolved upon the valveseat to remove any sediment that may have located between the valve and the seat, or to grind the valve and seat to a more perfect lit in case there has been an uneven wear upon the face of either.

In operation, when it is desired to ascertain whether or not the valve is set fast to the seat, the operator, by a downward pull upon rope R, raises the valve-stem through the medium of lever R, and allows the valve I to rise. Should the valve be set, lever B is allowed to assume a normal position, and the overhanging ends of rope T are pulled upon to cause shaft S to revolve, and, through the medium .of gears T and M, the valve-stem and valve, thereby pulverizing any inerustation that may have formed upon the valveseat. Should the valve become irregularly worn and allow leakage of steam, it can be removed from its stem and be replaced by anotherl Should the valve-seat become inoperative by reason of any defects or uneven Wear, it can be removed by inserting a wrench into the square perforation and unscrewing the same and a new one inserted.

It will be seen that every provision has been made for the renewal of worn-out parts for the purpose of repair or renewal by new ones, and also that the valve and seat may be adjusted to a steam-tight fit while under full boiler-pressure.

. The squared perforation in the boss upon the upper face of the valve allows the squared end of the valve-stem to be raised vertically a sufficient height to permit the valve to blow off when lever B is depressed by means of rope R..

.That I claim is l. The combination, with the steam-dome, of a valve seated within the same, having a stem extending without the dome and carrying a jam-nut near its center portion, a frame attached to the dome, serving as a guide for the valve-stem, a weighted lever pivoted to one side of the dome-easing and resting upon the nut to hold the valve upon its seat, and a lifting-lever fulerumed to the guide-frame, bearing at one end upon the under side of the nutand adapted to lift the valve from its seat, substantially as and for the purpose setforth.

2. The combination, with the steam-dome, of a valve seated within the same, having a stem extending without the dome and carrying a gear upon its outer end, a horizontal shaft carrying a gear at one end meshing with the gear upon the valve-stem, a frame attached to the dome, supporting the horizontal shaft and serving as a journal to the valve-stem, a pulley secured to the horizontal shaft, and a cord for operating the same, as

and for the purpose set forth.

In testimony that I claim the foregoing as my own I hereby affix my signature in presence of two witnesses.

CHARLES H. PAYNE.

XVitnesses:

XVILLIAM WEBSTER, J NO. L. CoNDRoN.

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