US799202A - Gage-cock. - Google Patents

Description

No. 799,202. PATENTED SEPT. l2, 1905. R. B. SWINNY.

GAGE COCK.

APPLICATION FILED Amma. 1905.

l l l A I I y l Attorneys.

Uni-freie solteras feafrnnzr onirica.

ROSS B. SVINNY, OF BELPRE, OHIO, ASSIGNOR OF (,)NFl-lIALF TO JACOB HENRY SHAW', OF HELPEN, Ol'IlO.

GAGE-COCK.

Specification of Letters Patent.

Patented Sept. 12, 1905,

Application filed April 18, 1905. Serial No. 256,201.

Be it known that 1, Ross B. SWINNY, a citizen otl the United States, residing at Belpre, in the county of lVashington and State ot' Ohio, have invented a new and useful Gage-Cock, ot' which the following is a specification.

This invention relates to gage-cocks for steam-boilers.

The object ot the invention is to provide a gage-cock in which clogging' ot' the operative parts thereoil shall be positively precluded; in which there will at all times be afforded a 'free passage for water and steam exteriorly ot' the cock; in which the main valve will always be caused 'to seat itselll with absolute accuracy, thereby to insure positive cutting olil of the escape ot' steam or water; in which the operative parts may be removed while steam is on the boiler without danger ot' scalding the operator, and in which all the parts are so constructed and combined as to insure high eiiiciency in use with the minimum dang'er ot' derangement.

lVith the above and other objects in view, as will appear as the nature ot' the invention is better understood, the same consists in the novel construction and combination of parts ot' a gage-cock, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part otl this specitication, and in which like characters ot` reference indicate corresponding parts, Figure 1 is a view in longitudinal section through a gage-cock constructed in accordance with the present invention. Fig. 2 is a view in transverse section, taken on the line 2 Q, Fig. 1, and looking in the direction ot' the arrow thereon. Fig. 3 is a detached detail view otl the cheek or supplemental valve unseating member. Fig. l is a detail View, partly in section, of a reversible valve-seat used in combination with the main valve. Fig. is a perspective detail view of a gage employed 't'or holding the check-valve combined with the gage-cock.

'l'he cock embodies in its construction a shank l, which is eXteriorly tapered and provided near one end with threads E2 to engage a suitable opening in the boiler. (Not necessary to be shown.) The shank is provided with a longitudinal bore 3, which is preferably of the same diameter throughout, and one end of the shank is furnished with a valveseat l and the other end with a polygonal wrench-face 5 to facilitate the positioning' ot' the shank upon the boiler. The valve-seat 4 is engaged by a ball-valve 6, which constitutes a cheek or supplemental valve and is held combined with the shank through the medium ot' a cage, (designated generally 7,) the same comprising in this instance three arms 8, the i'ree terminals ot' which are threaded or provided with corrugations 9 to engage the threads Q ot' the shank. '.lhelarger or outer end of the shank is provided with a socket having threaded walls 10, which are engaged by a threaded extension 11 ot' a head 12, the exterior ot' which, as shown in cross-section in Fig'. 2, is polygonal to present wrench-faces. The extension 11 is provided with a centrallydisposed threaded orilice 1B, which communicates with the bore i) ot' the shank and is engaged by a nipple l-.l in the nature ot' a cage, with which is combined a rod 15, the cage and rod constituting a check-valve-u nseating member, as it will be seen by reference to Fig. 1 that when the parts of the cock are assembled the rod bears against the check-valve 6 and keeps it normally out ot engagement with its seat ft.

Arranged within the nipple il is the main valve 16, which is also ot' the ball type and is held in place therein by an annulus 1T, exteriorly threaded to engage with interior threads 18, provided in then nipple 14n for the purpose, the annulus 1T being provided with double valve-seats 19, with o ne ot which the valve 16 is always in engagement when steampressure is on the boiler. By the provision ot' the double valve-seats the annulus may be reversed and its utility thus doubly prolonged.

Secured to one ot' the inner walls ot' the head, preferably that one carryingl the extension 11, is a spider 2l), through which projects one end ol a push-rod 2 l that extends outward through an orilice in the outer wall ot' the head and in a boss 22 thereon, and carries at its Vfree end a detachable head 23, between which and the boss is disposed a coiled springI 2.1L, surrounding the rod and operating normally to hold it out of engagement with the main valve. Then the level ot the water in the boiler is to be ascertained, the rod Q1 is pushed in, thereby unseating the valve 1li, whereupon either steam or water, as the case may be, will rush past the valve and into the head and thence escape through a downward-opening orilice formed in its lower wall, and upon IOO pressure being released from the rod it will resume its normal position, leaving the valve 16 free to be again seated by the steam or water pressure of the boiler. In order to limit the outward movement of the rod 21, there is combined therewith a stop 26, which will engage with one of the inner walls of the vhead, as clearly shown in Fig. 1.

As above stated, it is one of the objects of the invention to combine the parts in such manner as to permit separation therefrom of the main valve and its accessories while steam is upon the boiler, and this object is secured by the provision of the rod 15, it being seen that as soon as the head is rotated in the direction necessary to detach it from the shank the check-valve 6 will start to seat itself, and before the head is entirely detached the check-valve will have seated itself entirely, thereby cutting off the escape of steam or water. The head with its combined parts may then be removed and any necessary repairs made, such as the replacement of an annulus for one that is worn out or the supplying of a new main valve, should this be necessary, or for any other purpose.

It will be seen from the foregoing description that in the gage-cock of this invention there are absolutely no parts which can corrode and become rust-locked, and further,by reason that the main valve is always rotated slightly when unseated in testing the water-level in the boiler it will be constantly Seeking a new seat, so that leakage between the said valve and its seat will positively be precluded.

Having thus described the invention, what is claimed isl. A gage-cock comprising a shank, a cage combined with one end thereof, a check-valve disposed within the cage, a cage-nipple combined with the other end of the shank and having an extension to engage with the checkvalve to hold it normally unseated, a main valve arranged within the nipple-cage, and means for unseating the latter valve.

2. A gage-cock comprising a shank, a normally unseated cheek-valve arranged at one end thereof, a head combined with the other end of the shank, a nipple-cage combined with the head and having an extension normally in engagement with the check-valve, a main valve arranged within the nipple-cage, a valveseat carried by the cage and with which the main valve coacts, and a spring-pressed rod carried by the head and adapted for unseating the main valve.

3. A gage-cock comprising a shank having a check-valve combined with one end thereof, a head combined with the other end and provided with an escape-port, a nipple-cage combined with the head and having an extension normally in engagement with the check-Valve to hold the same unseated, a main valve arranged within the nipple-cage, a double-faced valve-seat combined with the cage, a spider combined with the interior of the head, and a spring-pressed rod extending through one wall of the head and through the spider and operating to unseat the main valve.

In testimony that I claim the foregoing as my own I have hereto afixed my signature in the presence of two witnesses.

ROSS B. SWINNY.

Vitnesses:

J No. S. VARNIGK, J. B. VATERMAN.

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