US267416A - Gage-cock - Google Patents

Description

(NoModeL) L B ULTON GAGE COCK.

,416. Patented Nov. 14, 1.882.

WITNESSES: gm, MW

ATTORNEYJ.

LOUIS B. FULTON, OF PITTSBURG, PENNSYLVANIA.

GAG E-COCK.

SPECIFICATION forming part of Letters Patent No. 267,416, dated November 14, 1882. Application filed May 2, 1832. (No model.)

To all whom it may concern:

Be it known that I, LOUIS B. FULTON, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Gage-Cocks; 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 and use the same, reference being had to the accompanying drawings, which form a part of this specification, in which Figure l is a longitudinal section of my improved gagecock. Fig. 2 is a side View of the valve and stem; Fig. 3, an end view of same. Fig. 4 is a side view of modified propeller on stem, and Fig. 5 an end view of same;

This invention has forits object the construction of a self-grinding gage-cock, adapted especially to locomotive and other boilers wherein the valve is seated by direct movementofa handle, and the further object of providing means for remedying the annoyance of a leak in the VHlVG or seat during a trip of the locomotive or steamboat, or while steam is up in a stationary boiler.

The invention consists in constructing the cock with two valves closing respectively with and against the pressure, and two corresponding valve-seats; further, in the construction and combination of parts, substantially as hereinafter described and claimed.

A is the section which is to be screwed into the boiler-head. Another section, B, screws into the outer end of A, and both sections are recessed to form the chamber a, at whose inner end I form the valve-seat b in section A and at the outer end the valve-seat cin section B. The latter section has a passage, (1, outside the seat 0, which communicates with the exterior through the transverse passage 0, passage d being larger than the valve-stem. Section B has the projecting endf bored centrally for the passage ofthe valve-stem 9. Stem g is rounded at its outer end, and at its inner end is enlarged, and at each end of its enlargement h, I form the valves 13 and 70, respectively, as shown.

About the centerof the enlargementh, Iconstruct the rotating collar 1, playing freely with the valve-stem in the chamber a, and having the spiral holes or slits m, as shown. I bore out the enlargement h at its inner end to form the cavity a, which not only serves to lighten the body, but also to center the stem by the action of the steam against the edge formed by the conical valve 2'.

The end f of section B is threaded to receive the threaded and recessed nipple P, which is provided with a hand-wheel, Q, or similar de vice for operating. I place a hard-metal plate, 1", in the end of recess 8 to withstand the wear of the stem 9.

Thus constructed, the operation is as follows: For locomotive and other boilers subject to vibration it is desirable to close the valve positively. For this purpose I screw the handle Q inwardly until the plate 1" forces the stem 9 inwardly far enough to close the inner valve, t, against the seat b, as shown in Fig. 1. WVhen the cock is to be tried the handle Q is unscrewed slightly, and the pressure of steam forces it open, causing the end ofstem g to rest against the plate 4' or the end of recess 8. In this position, if the part it of the stem has the collar 1, the steam or water escaping through the spiral openings will cause the stem and valve to rotate, and this rotation continues till it is checked by grinding against its seat in the act of closure. If,while the locomotive is running or the steam still generating in a boiler, the valve 6 becomes leaky, and troublesome thereby, I unscrew the handle Q till the valve 70 closes against the seat 0, and I am thus rid of the annoying leak till an opportunityis presented of repairing the valve t. I thus normally use the valve t' positively, and in case of leaks bring the valve 70 into action.

For some boilers I can use the valve ]i; normally, effecting the closure by steam-pressure, and in emergency use the valve t', the reverse of that just described. When the valve 7.: is seated the cock is tried by screwing in the handie Q, thus pressing the valve 70 off its seat 0 and allowing the steam or water to escape at c. In this case, also, if the collar Z be on the part It, the stem 9 will be setin rapid rotation. I have thus always an extra valve and seat to do duty in case ofan accident happening to the one in use. Where the water used is apt to form scale it is important to be able to immediately stop a leaky gage-cock, as, if the leak be not controlled, the outlet of the cock will, unless the latter is very frequently tested, become covered with mud or sediment, which soon bakes into an impenetrable mass and renders the cock useless until repaired.

Instead of screwing the nipple P over the endf, it may be so fitted as to screw into the latter. This form would take less metal for its construction.

I claim as my invention- 1. A gage-cock provided with two valves and corresponding seats, both said valves bein g on a single stem, one valve arranged to close positively and the other to close by the boiler pressure, substantially as described.

2. Ina gage-cock,the combination of the sections A B, having the respective valve-seats b 0, chamber a, and outlet (1 0, with loose reciproeating or sliding stem g, having the valves i LOUIS B. FULTON.

Witnesses:

T. J. MOTIGHE, THOMAS J. PATTERSON.

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