US278345A - Water-gage - Google Patents

Description

' (NoModel.)

l F. H. LINCOLN.

. WATER GAGE. N0. 278,345.` Patented May 29,1883. .A

Q umnmunmulllll y A 76, ME -om PATENT? OFFICE,

EEANCISH. LINCOLN, 0E CHELSEA, MASSACHUSETTS.

` WATER-GAGE.

SPECIFICATION forming part of Letters Patent No. 278,345, dated May 29, lees,

Application filed VFebruary 14,1883. (No model.)

Massachusetts, have invented a certain new and useful Improvementin Gage-Tube Fittings for Steam-Boilers, of which the following'is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains -to make and use the same, reference being had to the accompanying drawin gs,formin g a part of this Figure 1 is an isometrical perspective view, showing my improvement, a part ofthe fittings being represented in Section; Fig. 2, a vertical transverse section of the lower valve; Fig. 3, alike view of the upper valve, and Fig.4 a verticaln longitudinal section of one of the stop-cocks.

Likeletters of referenceindicate corresponding parts in the different igurcs of the draw,-

ings. i

' My invention relates to means for closing .the fittings automatically when the gage-tube is accidentally broken, thereby preventing i steam or hot waterfrom being ejected throughY the gage-tube openings; and it consists in providing the flttingfsfwitli valves constructed and arranged to operate as hereinafter more fully set forth and claimed, by which a more effective device of this character is produced than isnow in ordinary use. i

It` is well` known that. when the ordinary glass gage-tubes of ,steam-boilers are acci-l dentally broken much damage frequently occurs by the emission of steam and hot water before the' stop-cocks in the fittings can be closed, more especially when the breakage occurs in the absence ofthe engineer or` frema`h. My improvement` is designed to obviate this objection, and to that end I make use of appliances which will be readily understood by all conversant with such matters from the following explanation, their extreme Simplicity rendering an elaborate description unnecessary. v

ln the drawings, A represents` thegage tube, and B the upper and Cthe lower pipe leading to the boiler. The pipes are respectively provided with stop-cocks D, and open at their outer ends into the cylindrical chambers serted in the bottom of. the chamber E and its lower end in the top of the chamber F, being packed in the ordinary manner. -A port, an, opening downwardly, connects'the chamber E with the upper end ofthe tube, and a like port, d, opening upwardly, connects the chamber F with its lower end. Disposed in theupper chamber, E, there is a valve, a,

provided with the weighted lever fr, pivoted in the standard t, and adapted to close the port m. The lower chamber, F,"is provided witha petcock or blowoff,7 H, and with a gravitatin g valve, i, having the lever a pivoted by its outer end at r in the hanger o, said valve being adapted to close the port d. The stop-cock D has its valve-stem f provided with a double-facedvalve, g, its front or inner face being adapted to t the seatt, and its rear or outer face the seat n, as shown in Fig. 4, in whichit is represented as Closed, or the valve turned down upon its seat l. In ordi nary stop-cocks of this character it is necesi sary to pack the valve-stem carefully to prevent leakage around the stem when the valve is open; but in my improved stop-cock, as shown in Fig. 4, the valve-stem f is exteriorly threaded to fit a female screw in the stem holder or shank Gr, theshank being `screwed into the globe q, and the Seat a formed directly in the inner end of the shank, thereby avoidy in g the necessity of using packing for the stem, greatly simplifying the parts and reducing the cost of construction, it being understood that when the valve is opened or raised from the seat Z the stem is to be turned out until thevalve restsin the seat u.

In the use ot' my improvement, the stop--A cocks D D being-open, if now the tube A is removed or broken, the usual back-pressure on the valve t' will be withdrawn, and the water, i

and as shown in Fig. 4the subject-matter of other Letters Patent, I do not elaim'the same in this specification but,

Having thus explained my invention, what 1 claim is- A water-gage forsteam-boilers, having the pipes B C, stop-cocks D D, chambers E F, and glass tube A, connecting said chambers, the chamber E being provided With the downwardly-opening port m and lever said lever beng'centraily pivoted in the standard t, and

provided with the valve a, adapted for closing said port', and the chamber F provided with the upward1y-opening port d and lever z, said lever being pivoted at one end to the hanger V15 QJ, and provided at its opposite end with the `valve i, adapted to close said port, substantially as set forth.

FRANCIS H. LINCOLN.

Witnesses:

C. A. SHAW,

L. J. WHITE.

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