US1033956A - Gage-cock. - Google Patents

Description

j. R. SHAPLEY.

GAGE COOK.

IIIIIIIIIIIIIIIIIIIIIIIIII 1.

COLUMBIA PLANDGRAPH co.. wAsHxh' GGGGGGG c.

siarns a NT 1C.

RAYMOND R'. SHAPLEY, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO BENJAMIN F. SNAVELY, 0F HARRISBURG, PENNSYLVANIA.

GAGE-COCK.

Specification of Letters Patent.

Patented July 30, 1912.

Application led October' 24, 1911. Serial No. 656,373.

T0 all whom t may concern Be it known that I, RAYMOND R. SHA1- LEY, a citizen of the United States, residing at Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented a new and useful Gage-Cock, of which the following is a specification.

This invention relates to gage cocks and is more particularly an improvement upon the structure disclosed in Patent No. 950,351, issued to me February 22, 1910.

In devices of this character heretofore provided with auxiliary valves, it has been impossible to grind the main valves without releasing the pressure from the boiler, and, when it has been found necessary to dress the seats of the main valves, said valves have lirst been removed and the seats reamed by means of a tool provided for that purpose. The lit of each valve upon a seat prepared in this manner has not been as accurate as desired and as is obtained by grinding a valve upon its seat. Such grinding has been impossible heretofore, however, without unseating the auxiliary valve.

It is the obj ect of the present invention to provide a gage cock in which either or both of the valves can be ground upon their seats without releasing the pressure.

VvTith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

ln said drawings: Figure 1 is a longitudinal section through the gage cock, the two valves being unseated. Fig. 2 is a view partly in side elevation and partly' in section of the gage cock, the spacing stem being removed and both valves being vshown upon their seats. Fig. 3 is a section on line A-B Fig. 1. Fig. 4L is a section on line C-D Fig. 1. Fig. 5 is a perspective view of the spacing stem. Fig. 6 is a perspective View of the main valve.

Referring to the figures by characters of reference 1 designates the casing of the gage cock, the same being pro-vided with opposed seats 2 and 3 for the main and auxiliary valves respectively. Both ends of the casing are open, one end portion being exterior-ly screw threaded so as to engage the wall of a boiler, as indicated at 4;, while the other end of the casing is interiorly screw threaded as at 5, for engagement with the threaded portion 6 of a valve stem 7. The inner end of the stem 7 has an opening 7 therein to receive a stem 8 projecting from the tapered main valve S of the cock and a central angular recess 9 is formed within the free end of the valve 8 and is adapted to receive an angular spacing stem 10. This stem 10 is arranged longitudinally in casing 1 and one end portion thereof is seated within an angular recess 11 formed in t-he center of an auxiliary valve 12. The auxiliary valve 12 is preferably formed with longitudinal wings 13 whereby it is held properly centered within the casing 1 when the valve is off its seat, steam being free to fiow past the valve by way of the spaces between the wings. It will be noted that the greatest diameter of the stem 10 is substantially equal to the internal diameter of the casing 1 between the seats 2 `and 3. Thus it will be seen that the stem 10, when placed in the casing, becomes centered so as to be readily seated within the recesses 9 and 1l without requiring any particular adjustment of the parts. As the stem is angular in cross sectional contour it will be apparent that it can thus be centered within the casing without interfering with the passage of fluid between the flat walls of the stem and the interior surface of the casing.

A discharge nozzle 14 extends from the casing l at a point adjacent the main valve 8.

With the parts constructed and assembled as described, it will be seen that by unscrewing the valve stem 7 so as to unseat the valve 8, steam pressure will cause the auxiliary valve 12 to move against its seat, thus pre vent-ing the escape of pressure. After the auxiliary valve has thus been seated, the stem 7 can be further rotated one or more times after which, by turning the stem back and forth the auxiliary valve can be caused to grind upon its seat, t-hus removing sediment from the valve and its seat and causing the said valve to lit snugly on the seat. This grinding of the auxiliary valve is of course permitted in View of the fact that after the auxiliary Valve becomes seated urther unscrewing of the stem 7 tends to partly Withdraw the stem from the spacing stem l0.

Should it be desired to grind the main Valve Without releasing the pressure, the Valve stem 7 is removed entirely from the casing 1 and the spacing stem l0 is then removed. By then reinserting the valve 8 into the casing 1, said valve can be ground upon its seat in the usual manner Without unseating the auxiliary Valve l2.

Vhat is claimed is In a gage cock, the combination with a casing having opposed tapered seats therein, and a threaded Valve stem screwed into the casing and having an angular opening in the inner end thereof, of a main valve having a tapered end formed With an angular recess, an angular stem extending from and integral With the other end of the main valve and slidable into and adapted to frictionally engage the Walls of the recess in the threaded stem, an angular spacing stem seated at one end Within the recess in the main valve and extending longitudinally Within the casing and past the opposed seats, and a tapered auxiliary valve having a recess for the reception of the other end of said spacing stem.

In testimony that I claim the foregoing as my own, I have hereto aiiixed my signature in the presence of two Witnesses.

RAYMOND R. SHAPLEY.

vVitnessesn FRED IV. STUART, EUGENE SNYDER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

v Washington, D. C.

Images