US618527A - Gage-cock - Google Patents

Description

No. 6|s,527. Patented 1an. 31,1899.

- H. WARREN.

GAGE CUCK.v

(Application led Oct. 14, 1898.)

(No'mudel.)

. the objects of the invention are, first, to pre- Nrrnn TATES ATENT trice@ JOHN H. lVARREN, OF CLEVELAND, OHIO.

GAG E-COCK.

SPECIFICATION forming part of Letters Patent No. 618,527, dated January 31, 1899.

Application filed October 14, 1898.

T0 @ZZ/whom t vmay concern:

Be it known that I, JOHN H. WARREN, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Gage-Cocks; and I do 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 and use the same.

My invention relates to -gage-cocks; and

serve and protect the spring which seats the valve, so that it will not be directly exposed to the heat'of the steam and water which enter the cock, and thereby caused to lose its tension and be rendered practically worthless in a comparatively short space of time, as occurs generally with springs confined within the body of the cock where such direct exposure to steam and superheated water is unavoidable; and the second object' of the invention is to prevent the disagreeable leakage which cocks very generally are liable to have through the head of the barrel where the valve-operating stem or rod enters and when it is pressed inward and the valve is opened to make the testings. This leakage is liable to be not only disagreeable, but, owing to the high pressures within the boiler, it frequently occurs that it is dangerous, being spurted out with force and burning the hands and often the face of the engineer. Both these conspicuous objections are wholly overcome in and through my invention; and theinvention therefore consists in a gage-cock of safety construction, substantially as shown and described, and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a longitudinal sectional elevation of the cock complete as equipped for service and with the main valve closed. Fig. 2 is alongitudinal elevation, partly in section, of the valve mechanism alone, as hereinafter more fully described.

A represents the body or barrel of the cock, provided with a discharge-nipple a, which may be of any suitable and usual construction and located in the usual position to discharge directly downward or sideward. The central bulb or chamber 2, from which this Serial No. 693,486. (No model.)

discharge occurs,has at each end a diaphragm 3 and t, respectively, and each diaphragm is provided at its center with an open passage and a valve-seat. Outside of these dia'- phragms are barrel-shaped extensions or extremities 5 and 6, the extremity 6 being exteriorly threaded to screw into the boiler, as usual, and the extremity 5 adapted to receive a special construction of valve-head B. This head has at least a dual purpose and function, being provided with a valve b at its inner end to engage the valve-seat 7 in the diaphragm 4 when the valve-stem C is depressed or pressed inward to open main valve c, which has its seat in diaphragm 3, and thus when said main valve is Opened and the heated fluid enters chamber 2 it is prevented by the simultaneous closingof valve l? from leaking or in any Way escaping into the extension 6 of the body A and of course from being forced out the head of the barrel and scalding the engineer, as hereinbefore referred to. However, it will at the best occur in the interim of the unseating of the main valve C and the seating of the auX- iliary valve Z2 that more or less water or steam will be driven through the valve-seat 7, and this may also occur by a very slight opening of the main valve and consequent insufficient closing of the auxiliary valve, for the two valves are so connected as to work together, and the valve-stem C is screwed into head B more or less and may have a comparatively loose threaded connection therewith, so as to promote perfect sealing of valve c, while the two valves are kept also in perfect and convenient adjustable relationship. A fine or a coarse adjustment may thus be made, and more or less opening given to main valve c and more or less closeness to the auxiliary valve b, the limit of play in any event being between these valves. Assuming, then, that some leakage past valve b will occur under certain conditions which are apt to arise from one cause or another, and to prevent discharge of hot water or steam endwise through body A, l provide the head B with alternate annular condensing-spaces b and ribsfb2-say one or more of each. The ribs or rings b2 fit closely in the barrel, so that they are practically as tight as packing would make them, and yet are loose enough to afford sufficient freedom IOO for sliding operation, and the head of valve b itself iits closely and oers an immediate barrier to the passage of fluid under pressure. The result in use is that the annular spaces b become filled with Water, which effectually cuts off the passage of steam and also packs against water, and altogether therefore issuance of hot water or steam through this channel is effectually out off; but, particularly in a double-valved construction like this,a valveclosing springis required, and,in fact, gagecocks generally have springs forthis purpose. Such springs, however,as already stated, have heretofore invariably, so far as I know and believe, been placed in positions where eX- posure to the hot water or steam would soon deprive them of their temper and tension and leave the cock in a defective condition. I have therefore constructed this cock to avoid this objection and placed the spring wholly outside of the body or barrel A, Where it is exposed to the cooling influence of the atmosphere and is not possibly subject to injurious heating. To this end the head B is extended outside the barrel A and provided with a spring-conning flange b3, while the extremity of the barrel A is fashioned in like suitable manner to form an inside bearing for the spring. A spiral spring D is coiled about the head B between these two bearings and exerts a constant tension outward, so as to normally keep the main valve closed except as it m0- mentarily is opened for gaging purposes. An operating-lever E serves to actuate the valves by depressing or pressing inward on head B.

Vhat I claim is- 1. The body of the cock having a central chamber and outlet and a diaphragm near each end provided with a valve-seat, in combination with a sliding head in one end of said body constructed to close one of said seats, and a main valve in the other end, substantially as described.

2. The body of a gage-cock provided with a valve-seat in its outer end and a barrelshaped extension outside said seat, in combination with an annularly grooved and ribbed head having a valve on its inner end and operating in said extension, substantially as described.

3. The combination of the body of the cock having a valve-seat at each end, with a main valve and stem, a slidin g head having a valve and a series of alternating ribs and grooves outside the valve, and a spring to close the main valve, substantially as described.

4. In gage-cocks a body provided with a main valve-seat and an auxiliary seat to prevent leakage from the cock, in combination With a main valve and a sliding head constructed to close on the auxiliary valve-seat and a spring about the outer portion of said head to close the main valve, substantially as described.

5. The body of the cock having a main valve-seat and an auxiliary valve-seat and a discharge between said seats, in combination with the -main valve and its stem, a valvehead connected with the outer end of said stem to close the auxiliary valve-seat and a spring about the said head and bearing against the outer end of the body of the cock, substantially as described.

Witness my hand to the foregoing specification this 8th day of October, 1898.

JOHN II. VARREN.

Witnesses:

H. T. FISHER, R. B. MOSER.

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