US1102549A

US1102549A - Relief-valve.

Info

Publication number: US1102549A
Authority: US
Inventors: Harry J Rumpf
Original assignee: LEWIS H PHELPS
Current assignee: LEWIS H PHELPS
Priority date: 1912-05-09
Filing date: 1912-05-09
Publication date: 1914-07-07
Anticipated expiration: 1931-07-07

Description

H. J. RUMPP.

RELIEF VALVE.

APPLICATION FILED MAY 9, 1912.

1 1 2 549 Patented July 7, 1914.

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naanrrroar, Mar ens. s nner or I entrants are t a 3 th seas sier a I do hereby declare the following to he a is full, clear, and-exact description of the invention, such as. will enable others skilled. in

the art to which it appertains to make and use the same, reference 'bein had to thenccompanying drawings, anto letters or figures of reference marked thereon, which form a part of this'specification.

My invention relates to improvements in relief valves for hot water heating. systems, and more particularl "to that class of hot water systems wherein the water is maintained under a pressure addition to its natural hydrostatic head.

The device embodying; my invention therefore employs a mercury seal for the movable member, as customary.v Y

The device is simple, ecient, and reliable in operation'under all conditions'of service Heretofore it has been necessaryin similar devices toconnect the pressureregs,

later in the line below the expansion tank of thehot water system. This isoften impracticable and my device may be attached to the side of the expansion tanlaoron top thereof, so that an eixistinghot water system not under auxiliary pressure'may be readily converted into a system using euniliary pressure without disturbing the installation, and, by virtue of being' able to connect the overflow to the side or ,top of the expansion tank as well rain-th sestomary position, there will alwaysrbe sam cient space to accommodate the overflowde vice.

In the drawing, which shows the water pipe leading to the overflow, which has a threaded connection in the-cast iron or other metal bottom 20f the over flow device. Secured to the body 2 by a threaded connection is the body of the cas-v ing comprising the tubular portion? having at its upper end an inclined walld forming the bottom of an enlarged chamber 5. The portions 2, 3, 4: and 5 may be cast in one piece, if desired. The chamber 5 is clnseol by a screw-cap 6, and provided with a threaded nipple 7.

Within the casing 3 is the water inlet pipe 10" for the casing, having a screw oo nnecq tionwith-the bottom 2 and torming-a con: tinliationlcf the inlet pipe 1.. Thispipe erthe tubular portion 3 015- the-casing.

ing and with the pipeflt) is a bell 11 having a head 12.0f slight y larger diameter than ghasxa downwardly projecting flange 16 fthreaded on the outside and beveled at 17 on the inside, and. forms a cap for the reoeption of a vulcanizedfiher, rubber, or

other packing dish 18. r "1 The bell has its lowerportion immersed we ghts, as'20, provided with a central hole,

' As illustrated, theovertlow is intended for connection to the side of'the expansion tank. .An'inc-rease of pressure-in the system drives the water. against the. air trapped in the tank, causing it to rise and pass through pipes 53 and 10..v l'fthe pressure is sufiicient to the hell-ll, it will rise until'its lower fed'gefleaves the mercury 1.9,when, under or- "quietly pass down between 10 and 11 and beof the hell ll, rising between 11 and 3'to the overflow pipe 9. Should the pressure of the water he suddenly increased, some of the-mercury is apt to follow the water for the first few seconds into 5, and in so doing meets the deflecting surface 13 and is thrown back onto the conical wall t, and is prevented from being splashed out through the overflow 9. After the initial rush of water throu' "h the device the mercury immediately falls fietween 3 and 11 to the bottom of 3.

Should the expansion in the heating system lPatented dirty ft, this.

tends slightly above .the shoulder vformedetween the conical or incl ned-walls and v other tool for removing the cap. The cap so that they may be placed over the stem 15.

Concentric withth'e portion 3 of the seev theporti'on 3 of the casing, .==lhe lower face v Jinn t't t stl Edited. may be leaded t v any. sired extent by; means of removable.

dinary circumstances, it wilhunder the .sustainted pneumatlc pressure in the tank,

I tween the mercurysealand the lower edge the over-v flow device in vertical section, 1. represents be so great that water will pass over from the expansion tank to the overflow device, the lift of the bell 11 will, so to speak, increase the volume of pipe 10 before the seal at 19 is broken so that a certain amount of water will rcturn to the expansion tank and syste'm upon decrease of the expansion. On the other .hand, if no water passes to the overflow device" from the expansion tank, but only compressed air, a certain amount of air will be returned to the expansion tank, and an equivalent volume of water will be returned from said tank to the system when contraction sets in. The valve 14 being weiglited, the volume of mercury in the seal will be increased in proportion to the increase of weight used, and when this valve is lifted by the expansion. the mercuryseal prevents a sudden rush of the water or air, the mercury giving way, or stringing up between 11 and 3 only after a certain (3X- tent of lift of the valve. The mercury also insures an efl'ective seal should there be a small leakage between the packing 18 and the end of pipe 10. v 1

I claim 1. A relief valve comprising a casin having a body portion and an upper en arged chamber connected thereto by an inclined wall, a water inlet pipe extending concentrically through the body portion and terminating slightly above the lower edge of said inclined wall, a bell normally resting on said inlet pipe and terminating near the bottom of the casing and forming, with the casing and inlet pipe, concentric annular chambers which connect the pipe with the upper enlarged chamber, a mercury seal in the bottom of the casing normally closing communication between said annular chambers, said bell having a head extending over the lower portion of the inclined wall and cooperating with the latter to return-men cury forced from the casing back to the latter.

2. A relief valve comprising a casing having a body portion and an upper enlarged chamber connected thereto by an inclined wall, a water inlet pipe extending concentrically through thebody pgr tig n andater o niinating slightly above the lower edge of said inclined wall, a bell normally resting on said inlet pipe and terminating near the bottom of the casingand forming, with the casing and inlet pipe, concentric annular chambers which connect the pipe with the upper enlarged chamber, a mercury seal in the bottom of the casing normally closing communication between said annular chambers, said bell being provided with a head overhanging the lower portion of the inclined wall, the underface of the head being inclined downwardly and outwardly from the bell for the urpose specified.

In testimony t at I claim the foregoing as my invention, I have signed my name in presence of two subscriblng witnesses.

HARRY J. RUMPF.