US1156933A - Safety water-gage cock. - Google Patents

Description

w.; N. nowE. I SAFETYl WATER GAGEl COCK. PPLICATIUN FILED DEC. 6`. i912.

Patented' 0@t..1,1915f En s'rA'rEs rarnn'r onirica.

WILLIAM ROWE, 0F HIBBING, MINNESOTA. I

SAFETY WATER-GAGE COCK.

Specification of Letters Patent.

Application filed December 6, 1912. Serial No. 735,228.

may not be trapped and erroneously indicate a supply of water in the boiler.

In the operation of steam boilers it notl infrequently happens that throughl inadvertence or negligence, one or both of the water gage cocks are closed vwhile the boiler is'under steam. In such event water is trapped in the glass gage and as a conse' quence the water tender is deceived as to the water level in the boiler. This is one of the most fruitful causes of accidents in boiler practice and consequently many eX- plosions have occurred.

With my construction, 1f the cocks are closed the water drains from the glass' through the hole in the bonnet of the lower cock. In case the upper cock is closed and the lower open, then the hole in the bonnet struction and that the bonnet which contains the hole and is secured in place by a union nut, may be turned so that the hole may blow upward or downward, as desired. In practice it is desirable that the water glass should be blown out occasionally, and this is usually accomplished by putting a pet cock upon the lower water gage cock.A To blow out this water gage all that is necessary to do is to close the lower cock, leav ing the upper one open.

A further advantage is in that the valve seatin the bonnet of the valve is made removable. This is so constructed in order `that it may be ground in. As ordinarily service on a boiler.

constructed these valves cannot be ground for the obvious reason that a rotary motion cannot be secured with the valve incontact `with, the seat. In this construction by loosening the union nut which holdsthe bonfratentea oet. 1e, 1915.

net onr the body of the valve, the seat controlling the passage through ,the shank can `be ground in. Likewise by removing the bonnet it is possible to rotate the valve seat and grind it in. This feature is important in that the construction may be kept tightat all times without the use of gaskets.

'The invention will be more readilyunderstood by reference to the accompanying drawings, wherein, the figure is a vertical section through a Referring more particularlyto the drawings, it will be seen that the two, valve bodies 10, indentical in construction, are provided with threadedshanks 11, suitably secured in the boiler sheet (notshown). Inasmuch as the upper and lower cocks are duplicates, I will describe but one thereof. The body 10 of the valve is provided with the usual aperture 13, providing communication with the boiler, this aperture having a restricted portion and a seat 14, against which the end 15 of the valve member 16 is adapted to seat. Outside of the restricted portion of the aperture I provide an enlarged -opening 17, communicating with which is a duct 18, eX- tending through a threaded ,boss 19, within which is secured by a 4suitable'nut 20, the vusual gage glass 21.

The outer end of the valve body 10 is.

threaded and accommodates a nut 22, having an annular, inwardly extending flange 23. A bonnet, 24, having an exterior annular flange, is-held by the nut 22, a valve seat 25 being clamped between the two parts. This valve seat is not threaded and is provided with. a shoulder 26, fitting the squared end of the valve body 10. The member 25 is provided with a valve seat with which the valve 27, formed as an enlargement of the valve pair of gage cocks in sol member 16, may cooperate. The interior of l the bonnet 24A is threaded, coperating with threads 28 on the shank of the valve member'.

Y The exterior is also threaded and accommodates a union nut 29 as shown. lhandwheel 30, secured to the shank. of the valve member, provides means for rotation as required. It will be understood that the bonnet 24 is provided with a drain opening 31 It will'be seen that the construction shown provides many advantages. The valves and their seats may be readily ground in, the bonnet may be turned as desired, to present the drain opening in any direction. rlhe most important advantage, however, is in that the cocks cannot be closed and water be trapped, thus erroneously showing an incorrect height of w'ater in the boiler.

It is obvious that modifications may be made in the structure herein shown, and

such modifications as are within the scope'v of my' claims'I consider Within the spirit'of my invention.

I claim:

1. In a device. of the class described, the combination of upper and lower gage cocks having .a lgage glass therebetween, each Ycock comprising a casing having an .inner valve seat, a separable member provided with' a second valve seat, valves controlled by a single stem and adapted to act upon said Valve seats singly, and a vented bonnet secured to each casing, substantially as described.

2. In a device of the class described, the combination of upper and lower cocks having a gage glass therebetween, each cock including a casing forming a chamber and provided with a valve seat at one end, a closure for the opposite end of said chamber,.said closurehaving a second valve seat, means for clampingsaid closure in position,

and/a valve. \stem carrying valve members adapted to coperate with said seats altering an ou'ter valve seat, a bonnet outside of said disk, a clamping nut .for holding said disk and `said bonnet in engagement with said casing, and -a stem provided with valves adapted to coperate with said seats in succession, substantially as described.

` -WILLIAM N. ROVVE. -Witnesses:

W. R. TUENENNY, f E. L. CLYMER.

Copiez; of this patent may be obtained for ve cents each, by addressing the Commissioner of Eatents,

Washngtomb. U.

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