US883066A - Gage-cock. - Google Patents

Description

No. 883,066. VPAtmaNTBD MAR. 24,19%;

T. R. WHITTA'KER.

GAGE 000K.. APPLICATION FILED ABB'rS, 1907,

, gnocntoz w.. n .w a

CTT

imperfect operation of the gage.

THOMAS R. WHITTAKER, OF LAWRENCE, MASSACHUSETTS.

GAGE-COCK.

Specification of Letters Patent.

Patented March 24, 1908.

Application led April 3, 1907. Serial No. 366,194.

To'all 'whom it may concern.'

Be it known that l, THOMAS R. WHIT- TAKER, a citizen of the United States, residing at Lawrence, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Gage-Cocks, of which the following is a specification.

The invention relates to an improvement in try valves designed to be arranged in communication with a water column of a steam boiler and adapted to be manually operated to determine the height of the water level in the column.

The main object of the present invention is the provision of a try valve in which the parts are so constructed and connected as to provide for the convenientremoval of the wearing parts of the valve to permit repair or renewal without the necessity of disconnecting the valve as an entirety from the column.

The invention will be described in the following specification, reference being had particularly to the acccompanying drawings, in which Figure 1 is a vertical central section partly in elevation of a.try valve constructed in accordance with my invention, Fig. 2 is a transverse section on line 2-2 of Fig. 1.

The try valve of the present invention is designed to be connected with the water column of a steam boiler as an adjunct to the usual water gage, being primarilyT adapted to enable the engineer tc definitely determine the height of the water level independently of the gage, in order to provide against dangerous conditions in the event of clogging or For this purpose it is to be understood that the valve is secured to the column adjacent the usual location of the gages, as for example at the normal water level, and at extremes above and below the said level.

In specific structure the valve comprises a globe casing 1 of ordinary form, which is in open communication with the water column through the medium of a short pipe section 2, the latter having the usual threaded or any other preferred means of connection with the column and With the casing.

The relatively upper portion of the casing is formed with an opening 3 having the wall extended at 4 and interiorly threaded at 5 for the reception of a nipple 6, said nipple being centrally and longitudinally formed with a guide channel 5 for a purpose which will presently appear. The relatively lower portion of the casing l, at a point diametrically opposite the opening` 3 is formed with a comparatively large opening S, the wallof the casing being extended beyond the plane of the opening, as at 9, the interior surface of the extension 9 and the alined wall of the opening 8 being threaded at 10.

The opening 8 is designed to be closed by a seat plug 11., preferably exteriorly threaded for cooperation with the threads 10 of the extension 9. The plug 11 is provided at the relatively upper end with a transversely disposed seat plate l2, the upper surface of which is curved on a plane to coincide with the curvature of the inner surface of the casing l, so that when the seat is in place the upper surface thereof forms a continuation of the interior surface of the casing. The seat plate l2 is centrally formed with a valve opening 13, the wall of which is ground or otherwise formed to provide an effective valve seat. Beyond the seat plate 12 the seat plug is in the form of an annular extension 14, of such length as to project below the eilrtension 9 of the casing when the plug is in p ace.

A valve 15, preferably in the form of a dish body, is mounted within the casing for coperation `with the valve seat, said disk being secured upon a stem 16, the upper end of which is seated and guided within the channel 7 in the nipple 6, the lower end of the stem projecting below the lower edge of the annular extension 14 of the plug.

Secured to one side of the plug extension 14 are spaced bracket arms 17, between which is pivotally mounted a lever 18. The relatively inner end of the lever projects through and is guided in a vertically disposed slot 19 in the wall of the plug extension 14, being branched within said extension. to provide supporting arms 20, as clearly shown in Fig. 2.

An operating sleeve 21 is mounted for movement within the plug extension 14, said sleeve being of less diameter than the extension and being secured to the supporting arms 20 of the lever. The sleeve is interiorly provided with a finger 22, the operating section of which extends transversely of the sleeve and directly underlies the free lower end of the stem 16. The relative disposition of the parts is such that in the movement of the lever, under the influence of an operating member 23 secured to the outer end of said lever, the finger 22 will engage the lower end of the stem and elevate the disk 15 to unseat the same. The normal'dis'tance of the upper end of the sleeve 21 from the relatively lower surface of the seat plate 12 is such that when the valve disk has been unseated the upper edge of the sleeve will engage the under surface of the seat plate with the effect to direct the water or steam escaping through the opening 13 to and through the sleeve 21, thereby confining the steam or water and preventing undue spread of the same in delivery. If the pressure within the column is sufficient, however, to force some of the water or steam between the upper edge of the sleeve and the seat plate, the wall of the eX- tension 1/1 will act in a measure as a confining means to prevent the spread or scattering of the escaping fluid.

The operation of the valve is fully apparent from the above description, it being understood that the engineer may, by operating either of the valves, readily determine the approximate height of the water in the column, and thereby avoid entire dependence upon the gages or other indicators.

I am aware that try valves for the purpose of the present invention have been heretofore in use, but the salient feature of the present invention resides in the specific arrangement and construction of parts whereby the utmost facility is provided for the renewal or repair of the working parts of the valve. In this connection the construction and arrangement` of the seat plug is particularly important, as it will be at once obvious that the disengagement of the seat plug from the casing 1, which is conveniently accomplished by simply unscrewing the plug, will permit the complete removal from the casing of all wearing parts of the valve, exposing said parts for repair or renewal without interfering with the valve connection with the column.

While preferring the details of structure described and shown, it is to be understood that I do not limit myself thereto and consider as within the spirit of the present invention all such changes and variations as may fall within the scope of the appended claims. l

Having thus described the invention what is claimed as new, is

l. A gage cock comprising a casing formed with an opening, a seat plug removably secured in the casing and having its upper surface coincident with the interior surface of the casing, said plug being projected to form an annular extension and being formed with a valve opening communicating with the extension, a valve for said opening, a stem carried by the valve, a sleeve mounted within the extension of less exterior diameter than the interior diameter of the extension, means carried by the sleeve to engage the lower end of the valve stem on movement of the sleeve, and means for operating the sleeve so as to engage the stem and elevate the valve, the movement of the sleeve to elevate the valve serving to arrange one end of the sleeve concentric with and beyond the valve opening.

2. A gage cock comprising a casing formed with an opening, a seat plug removably secured in the opening of the casing and formed with a valve opening, an annular eX- tension projecting from the plug and below the casing, a valve for the opening in the plug, a valve stem projecting in opposite directions from the valve, means removably connected with the casing for guiding one end of the stem, a sleeve loosely seated in the plug extension and encircling the opposite end of the valve stem, said sleeve having an interior diameter greater than the diameter of the valve opening, means arranged within the sleeve to engage one end of the valve stem and operate the valve in the movement of the sleeve, said means being so arranged as to cause the sleeve to engage the seat plug about the valve opening therein when the valve has been fully elevated, and means supported by the plug extension for operating the sleeve.

3. A gage cock comprising a casing formed with an opening, a seat plug removably secured in the opening of the casing and formed with a valve opening, an annular extension projecting from the plug and below the casing, a valve for the opening in the plug, a valve stem projecting in opposite directions from the valve, means removably connected with the casing for guiding one end of the stem, a sleeve loosely seated in the plug eX- tension and encircling the opposite end ofthe valve stem, said sleeve having an interior diameter greater than the diameter of the valve opening, means arranged within the sleeve to engage one end of the valve stem and operate the valve in the movement of the sleeve, said 'means being so arranged as to cause the sleeve to engage the seat plug about the valve opening therein when the valve has been fully elevated, and an operating lever pivotally supported on the plug eX- tension and engaging the sleeve for the operation of the latter.

In testimony whereof, I affix my signature in presence of two witnesses..

THOMAS R. WHITTAKER.

Vitnesses:

JOHN L. FLETCHER, K. ALLEN.

Images