US1272251A - Relief-valve. - Google Patents

Description

w. l. GLENN.

RELIEF VALVE.

APPLICATION FILED MAY 19H Patented July 9, 1918.

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WITNESSES WILLIAM J. GLENN, OF STEELTON, ONTARIO, CANADA.

RELIEF-VALVE.

Application filed May 2, 1917.

To all whom it may concern:

Be it known that I, WILLIAM J. GLENN, a subject of the King of Great Britain, residing at Steelton, in the Province of Ontario and Dominion of Canada, have invented certain new and useful Improvements in Relief-Valves, of which the following is a specification.

This invention has reference to relief valves and contemplates the provision of an automatically pressure-operated valve mechanism adapted for use in connection with tho water-fronts of stoves and ranges.

An object of the invention is to provide valve means for relieving the steam pressure within the water-front of the stove or range when the same becomes excessive owing to the water contained in the feed pipes becoming frozen or to the fact that the valves of both the feed and'the supply pipes are closed.

A further object of the invention is to provide an improved form of valve mechanism adapted to have connection with the interior of a waterfr011t and automatically operated by the pressure of the steam generated therein, for discharging water from the water-front in liquid sprays over and upon the fuel bed of the stove or range, whereby the fire therein may be quenched.

WVith these and other objects in view, my invention consists of the novel arrangement and combination of parts as will be herein after more fully referred to and described in the following specification and pointed out in the drawings, wherein:

Figure 1 is a plan of the fuel bed and water-front of a stove;

Fig. 2 is a vertical, longitudinal section of the fuel bed and water-front;

Fig. 3 is a vertical sectional view of the relief valve shown detached from the waterfront;

Fig. 4 is a horizontal section of the valve, taken on line H of Fig. 3;

Fig. 5 is a horizontal section taken on line 55 of Fig. 3; and

Fig, 6 is a similar section on line 6-6 of Fig. 3.

In the drawings, 1 indicates a stove forming the rear wall of the fuel bed 2, the front wall of the bed being formed by the waterfront 3. The water-front comprises a rectangular casing divided longitudinally into upper and lower compartments by means of a web 4:. Suitable pipes (not shown), are

Specification of Letters Patent.

Patented July 9, 1918.

Serial No. 165,984.

adapted to be connected to the water-front 3 for the purpose of supplying water to the compartments at one end of the water-front and also to convey the water, when heated, from the opposite end thereof. It frequently happens that upon the freezing of the water contained in the supply pipes or in case the valves of both the supply and discharge pipes are closed, there is no escape for the water from the casing 3 so that as a result, an excessive amount of steam is generated in the casing, and the latter is blown apart by the expansive force of the steam, damaging the stove and causing the fire to be scattered about, besides probably fatally injuring persons in the near vicinity.

By employing this improved valve such disasters are entirely avoided and all danger from fire and explosion removed. The invention comprises a relief valve including a cylindrical body 5 having a head 10 with a recess 6 and a lower restricted shank 7 having a longitudinal bore or water passage extending therethrough for communication with the recess 6. A. plurality of radially disposed openings 9 are formed in the upper portion of the body 5 and extend from the recess 6 in a horizontal plane to the outer face of the head 10. The inner face of the recess 6 above the openings 9 is threaded for engagement with the threads of a plug 11, which has its upper face provided with a transverse groove 12, for receiving the end of a screw-driver whereby it may be screwed into the recess 6 of the valve body 5. An elongated tube 13 is disposed adjacent the lower end of the shank 7 and is provided with enlarged head 14 having an upper c011- caved surface 15 and threaded for engage ment with the threaded bore of the shank. This tube depends into the upper compartment of the water-front, terminating in spaced relation from the web 4 so that the water is permitted to flow up through the tube and into the recess 6.

A valve body 16 is movably mounted within the bore of the member 5 and is provided with a flared head 17 adapted to rest against valve seat 18, the lower portion of the valve body being provided with spaced angularly disposed wings 19. A narrow stem 20 depends centrally from the winged portion of the valve body and has its lower end threaded for engagement with a pressure regulating nut 21. A spring 22 is coiled about the stem and wing portion of the valve,

between a shoulder 28 of the bore and the nut 21. The nut 21 is made with radially dis-' posed spaced fingers 24 two of which have their ends 25 extended for engagement with grooves 26 extending vertically along-the inner face of the shank casing 7, so as to permit' vertical, but not rotary movement of the nut within the shank casing. The valve head 17 is provided with a niche 27 so that it may be readily turned by a screw driver or other suitable implement for advancing the nut 21 to the predetermined point upon the threaded stem 20, it being evident that rotation of the threaded stem will cause the nut 21 to move either toward or away from the spring 22, while the elevation of the valve head 17 from its seat may be limited to any desired height, by so positioning the nut that its abutment with the upper terminal 28 of the passageway may be premature or retarded.

V therein,

A semicircular deflecting band 29 is disposed within the recessed portion 6 so as to cover certain of the openings 9 therein. This band should be so positioned as to cover or block those openings facing toward the front of the stove, thus leaving the rear openings unobstructed. A split rivet 30 extends from the plate through one of the front openings 9 and has its outer ends bent to fasten the deflector in position.

The operation of the valve depends upon the amount of pressure exerted against the nut 21, and consequently the valve may be regulated to open upon the generation of a predetermined amount of pressure in the Water-front. Having determined the pressure at which the valve should automatically open, the nut 21 and valve member 16 are relatively adjusted to limit the opening movement of the valve. As explained before this is accomplished by advancing the ;nut to the required distance upon the threaded stem of the valve against the expansion of the spring 22. As the water in the compartment of the water front becomes heated an excesive amount of steam is generated and expands against the nut 21, forcing the latter upward within the shank 7 so that the valve 16 is thereby raised out of engagement with the seat 18, opening connection with the recessed portion 6. The fluid within the water-front is thus permitted to pass up through the tube 13, between the spaced fingers 24 of the nut and the wings 19 of the valve, into the recessfi, whence it is deflected by the band 29through the rear openings 9.

Owing to the spaced formation of these openings the water will be expelled in separate and distinct sprays over the fuel bed of the stove, as shown to advantage in Fig. 1 of the drawings. The spraying of the water upon the fire bed naturally tends to quench the fire and prevent further generation of steam within the water-front casing. The operation of the valve can be adjusted to operate at various pressures and as the various parts are separable, the entire devicemay be taken apart for cleaning purposes or whenever it becomes necessary to replace or adjust any of the parts.

Having thus described my invention I claim asnew and desire to claim by Letters Patent is 1. In a relief valve of the type described, the combination with an upright casing having an inlet at its lower end and a head at its upper end piercedwith a plurality of radial openings; of a curved band disposed "within said head said openings at their inner ends, and a fas- ,tening device passing through said band and covering certain of and selectively engaged with one of said openings, for the purpose set forth.

2. In a relief valve of the class described, the combination with the water front of a stove; of an upright valve casing whose body passes through the upper wall of said water front and has a head having a series of radial openings and a threaded aperture in its top, a plug removably closing said aperature, a band within the head adapted to be selectively disposed to cover certain of said openings, fastening means through the bandand one of the openings, and an upwardly-opening spring closed valve within said casing, for the purpose setforth.

3. In a relief valve of the type described, the combination with an upright casing having an inlet at its lower end and a recessed head at its upper end, the wall of the head being pierced with a plurllity of radial openings, and a closure for said recess; of a curved band disposed within said recess and covering certain of said openings at their inner ends, and a split pin passing through said band and'selectively engaged with one of said openings, for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses. V

- WILLIAM. J. GLENN. Witnesses:

RHEA KAUPP, DAVID Bnonrn.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Washington, D. G.

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