US783369A - Water-gage cock. - Google Patents

Description

No. 783,369. PATENTED FEB. 21, 1905. G. MLDEEM & W. I. ROWLAND.

WATER GAGE COCK.

APPLICATION FILED JUNE 22, 1904.

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UNITED STATES Patented February 21, 1905.

PATENT OEErcE.

OHARLES M. DEEM AND WASHINGTON I. ROWLAND, OF PARKERSBURG,

I WEST VIRGINIA.

WATER-GAGE COCK.

SPECIFICATION forming part of Letters Patent No 783,369, dated February 21, 1905.

Application filed June 22, 1904. Serial No. 213,700.

To all whom, it may concern.-

Be it known that we, CHARLES M. DEEM and WASHINGTON I. ROWLAND, citizens of the United States, residing at Parkersburg, in the 5 county of Wood and State of West Virginia, have invented new and useful Improvements in VVater-Gage Oocks, of which the following is a specification.

Our invention relates to new and useful 10 improvements in water-gage cocks for locomotive or stat-1onary boilers; and its object is to provide a device of this character to which repairs can be made while the boiler is in service and which does not require packing of 15 any kind.

A further object is to employ a screwless stem and a valve independent of the stem and which has a novel arrangement for lifting it from its seat.

20 With the above and other objects in view the invention consists of a body having a springpressed plug-cock arranged therein and which is adapted to shut off the passage of fluid through the body, so as to permit repairs to 5 be made while the boiler is in service. A stem is mounted within one end of the body and is held normally upon a seat provided therefor by a coiled spring which is out of the path of the fluid and is'not contacted thereby at any 3 time. One end of this stem is in the form of a can which is adapted to unseat a loose valve which is held by gravity upon a seat provided therefor. A screw-plug is located adjacent and in alinement with the loose valve, so that 35 by removing said plug the valve thereunder can be removed and ground or renewed as required.

The invention also consists in the further novel construction and combination of parts 4 hereinafter more fully described and claimed,

and illustrated in the accompanying drawing, which is a longitudinal section through the improved water-gage cock.

Referring to the drawing by numerals of 45 reference, 1 is the body of the device, having a threaded end 2. Within the opposite end of this body is a compartment 3, and extending from this compartment and through body 1 to the threaded end thereof is a passage 4.

This passage is intercepted by a tapered plugcock 5, having a passage 6 therein adapted to register with passage 4. Cook is held in proper position within body 1 by means of a coiled spring 7, which is fitted within a screwplug 8, detachably mounted in body 1 at one end of the cock 5. Spring 7 presses against the end of said cock and holds it firmly seated, so as to produce a tight joint. The projecting end 9 of the cock 5 is preferably formed angular, so

as to permit the same to be readily rotated by means of a suitable instrument. An aperture 10 is formed in the top of compartment 3, and its walls are screw-threaded for engagement with a screw-plug 11, having a stem 12, which projects into the compartment 3. Plug 11 has an angular head 13, whereby the same can be readily rotated for the purpose of removing the plug from or placing it in position. An extension 14 projects from body 1 at the bottom of compartment 3, preferably at right angles to the body, and this extension has a passage 15 extending longitudinally therethrough from compartment 8 and constituting a discharge-opening. Seated upon the inner end of passage 15 and the bottom of compartment 3 is a loose valve, which comprises a frusto-conical head 16, from which depends a stem 17, having wings 18 projecting laterally from its upper portion. Head 16 is arranged directly below and slightly removed from stem 12, and therefore is prevented by said stem from becoming displaced.

Projecting from the extension 14'below but parallel with the body 1 is an externally-screwthreaded projection 19. A passage 20 is formed within and extends through this projection, and the inner portion of this passage is contracted to form a shoulder or seat 2,1. Passage 20 opens into one side of passage 15 and in alinement with a recess 22, formed in the opposite side of said passage 15. A stem 23 is revolubly mounted in passage 20 and projects across passage 15, its end being revolubly mounted in recess 22. This stem has a beveled collar 24 thereon, which is adapted to bear on the seat 21, and a coiled spring 25 incloses and bears at opposite ends on collar 24 and on a screw-cap 26, respectively. This valve 16 lifted from its seat.

spring serves, therefore, to hold the collar 24" clamped against seat 21 and forms a tight joint, which obviates the necessity of employing packing. Cap 26 engages the threads on the projection 19. A groove 27 is formed within stem 23 at a point directly under the stem 17 of the loose valve. A knob 28 is secured to the other end of stem 23.

When it is desired to repair any of the parts of this device, it is merely necessary to rotate the cock 5 so as to cut off the escape of fluid through passage 4 to compartment 3. The screw-cap 11 can then be removed and Stem 23 and the spring thereon can also be easily removed by unscrewing the cap 26. It will be seen that these repairs can be made without placing the boiler out of service. By providing a stem 23, such as described, it is unnecessary to employ packing, and, moreover, the use of threads upon the stem is obviated. It will be seen that by turning the stem 23 the cam, which is produced by forming the groove 27, lifts valve 16 from its seat and by continuing the rotation of the stem 23 stem 17 of the valve will drop into groove 27 and therefore permit valve 16 to automatically shut off the passage of fluid through the body 1. By employing a stem which is not provided with threads the objectionable features incident to the use of threaded stems are obviated. It is well known that the tendency is to screw threaded stems too tight, thereby damaging both the valve and its seat and soon causing them to leak. By our arrangement of a spring-pressed stem damage resulting from this practice is eliminated, as it is impossible to misuse or strain any part, even though it be operated by a careless, thoughtless, or ignorant person.

' In the foregoing description we have shown the preferred form of our invention; but we do not limit ourselves thereto, as we are aware that modifications may be made therein without departing from the spirit or sacrificing any of the advantages thereof, and we therefore reserve theright to make such changes as fairly fall within the scope of our invention.

Having thus described the invention, what is claimed as new is In a device of the class described, a body having a passage extending therethrough and communicating at its inner end with a valvechamber provided in the body, a rotary plug valve intersecting the passage and having an opening adapted to register with the latter, said valve being operable for closing the passage, a discharge-passage leading from the valve-chamber, a gravity-valve arranged in the latter and adapted to normally close the discharge-passage, a tubular extension provided on the body and having a removable cap closing its outer end, a shoulder formed within the tubular extension, a rotary stem seated in the extension and projecting at one end into and intersecting the discharge-passage, a collar formed upon the stem to seat against the shoulder, a spring arranged within the extension and adapted to bear at its opposite ends upon the cap and collar respectively for pressing the latter to seated position, a cam provided on the inner end of the stem and adapted during rotation of the latter to open the gravity-valve, and a removable plug tapped into the body and having an extension projected into the valve-chamber and constituting an abutment for limiting the opening movement of the gravity-valve.

In testimony whereof we aifix our signatures in presence of two Witnesses.

Witnesses:

C. W. MAYHALL, A. B. MOFFATT.

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