US2014918A

US2014918A - Heater

Info

Publication number: US2014918A
Application number: US704058A
Authority: US
Inventors: Walter W Williams
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-12-26
Filing date: 1933-12-26
Publication date: 1935-09-17
Anticipated expiration: 1952-09-17

Description

@pin W, R935. W. W. WILLIAMS Zmsm T l nu BY A TTORNE Y.

ep. W7, 1135.

w. w. WILLIAMS HEATER 2 sheets-sheet 2 Filed Deo. 26, 1933 IN1/EN TOR. la//M TER W. .LM/.4 L //V ATTORNEY.

Patented Sept. 17, 1935 UNITED STATES traitant OFFICE 1 Claim.

Q This invention lrelates tor water heaters, and more particularly to the construction of a water heater in which the water is heated by the flame from a fluid fuel burner.Y

. 4It isran, object of this'invention to provide a device of vthis character which may be employed lfor vthe ,heating of water for domestic or other Y purposesas well as the heating of water for a hot water heating system or the heating of water `,.10. to produce steam either for commercial purposes or for useV in connection with a steamheating fisystem. It s-a further object of this invention to provider a Vcombustion chamber therein with l, meansV for efficiently conducting the gases of 15,A combustion-therefrom through a series of flues in @which both the combustion chamber and flues l. are entirely surrounded by the water to be heated. lItvis' another object of this invention to` provide as mall, compact heater of this character which 20is o f. particular advantage for-producing hot wafter for domestic purposes and which is of simple ,construction, readily assembled, and readily installed in a home, and which is adapted to be Y readilyconnected to 'the chimney or stack of the t``wI425,` dwelling or furnacewithin the dwelling.

With these. and other objects in view, refer- .enceismadeto the accompanying sheets of drawings which illustrate a preferred form of this invention, with theA .understanding that minor .30 changes may be made without departing from v.the sc ope thereof.

L 1n the drawings:

.Figure 1 is a view in central Vertical section f .fof a Apreferred form of this device with some parts 35 shown in elevation.

Figure 2 is a View in transverse section taken on the line 2--2, Figure 1, looking in the direction of the arrows.

FigureS` is a similar View taken on the line 40 3 3, Figure 1, looking in the direction of the arrows.

rFigure 4 is a similar view taken on the line 4%4, looking in the direction of the arrows.

V.Figure is a view in rear elevation of Figure 1 in which the stovepipe connection to the stack been omitted.

Figure 6 is a detail view, partly in section and partly in side elevation, of the burner assembly and air pressure fuel delivery thereto of the 50 fluid fuel burner illustrated in Figure 1.

The drawings illustrate an embodiment of this invention as applied to a hot water heater for domestic purposes, which includes a horizontal, cylindrical, metallic casing I provided with end 55 enclosures 2 and 3 surrounded by a cylindrical jacket l! spaced apart therefrom and providedV

ywith end closures

5 and 6 with the intervening space lled with heat insulating material 1. The

`casings i and are provided with a plurality of registering apertures 8 .which are shown in Fig- 5 ure l asbeing normally closed by plugs 9 at the bottom and connected at the top to a cold water inlet I6 and a hot water outlet ll, in which the cold water inlet il) is connected by pipe I2 to aV source of water supply and the hot water outletv 10 li is connected by pipe I3 for delivering the hot water where needed for domestic purposes.

A cylindrical, metallic combustion chamber casing ifi is mounted in the

end closures

2 and 5 with its aXis parallel to the axis of the casing I and arranged with its lower side adjacent tobut ,A spaced apart from the bottom of the horizontal casing i with one end extending beyondthe outer, surface oi the closure 5 and the other end terminated adjacent the Vertical centerl line of .the

casing I and provided with a metallic closure plate i5, which plate is provided with a central opening and a plurality of spaced-apart similar openings, the centers of which are arranged on a circle concentric with the central opening. The opposite closure plate 3 of the casing I is provided with asimilar number of similarly arranged similar openings in line with the opening in the platel. Metallic pipes ori flues I6 are 4'passed Vthrough the correspondingopenings in 30 theclosures itv and 3 and are secured thereto as bywelding so that the interior of the combustion chamber casing Ill communicates through said pipes i6 to the exterior of the closure plate 3. A

cylindrical casing Il, similar in diameter toy the,35

Y casing vIll and similarly surrounding the ends of ,the pipes I6,passing through the end closure 3, s

mounted thereon and passes through the end closure 6, and to the outer end of this casing a cap IB is attached which is provided with a con- 40 centric outstanding flange I9 for attachment to an elbow 2@ of the stove pipe 2l leading to the chimney.

The combustion chamber casing I4 is provided with'a cylindrical lining of refractory material 45 22 to form a combustion chamber therein extending from the outer end of the casing but spaced apart from the closure i5 thereof and supports a cylindrical bafe or target 23 concentric with the combustion chamber but of less diameter than the inner diameter of the combustion chamber in the space between the end of the combustion chamber and closure I5 by preferably three extensions 24 from the end walls of the lining 22 joined to the periphery of the baie or target 23 55 so that the baffle or target is spaced apart from both the end of the combustion chamber and the closure I5.

About the exterior end of the casing I4 and refractory lining 22 a cap 25 is secured, which cap is provided with a central opening through which the draft pipe 26 is extended from the casing 21 of a fluid fuel burner mechanism, which casing ls secured to the said cap 25. The interior of the cap 25 is provided with a refractory lining 28 which also surrounds the draft pipe 26. The fluid fuel burner is preferably of the type disclosed in this applicants prior copending application Serial Number 662,711, filed March 25, 1933, and is provided with a nozzle 29 adjacent the inner end of the draft pipe 26 for delivering fuel to be ignited and burned within the combustion chamber surrounded by the refractory walls 22.

It is preferable to impart rigidity to the end closures 2 and 3 above the combustion chamber and flues I6 by the application of tie-rods 39 passing through and secured to the respective end closures as shown in Figure 1. It is also preferable to support the horizontal casing upon legs 3| extending downward from an integral arcuate portion 32 of the same radius as that of the casings I4 and I1, which arcuate portion 32 engages and supports the underside of the casing I4 and the underside of the casing I1 exterior to the

end closures

5 and 6.

As the fluid fuel burner illustrated is of the electrically operated and controlled type, a control 33 therefor is mounted on the exterior of the casing 5, having a bulb 34 passing through both adjacent end closures Z and 5, which is adapted to be responsive to the temperature or pressure of the water or steam, as the case may be, within the casing I. The flange I9 of the cap I8 preferably mounts a commercial stack safety 35 forming a part of the fluid fuel burner control having a thermostatic element 36 passing within the opening leading to the stack.

In the type of fluid fuel burner disclosed, fluid fuel is delivered from an electrically operated compression pump 31 through a pipe 38 to the interior of a chamber 39 formed within a casing 40 inserted through the bottom of the casing 21 mounted upon the cap 25, which casing 40 is secured to the casing 21, as shown in Figure 6, and which casing 46 supports an air delivery pipe 4I leading to the nozzle 29. A smaller fuel discharge pipe 42 is mounted concentric with and spaced apart from the interior of the pipe 4I and leads from the nozzle 29 to a bracket 43 supported Within the chamber 39, which is provided with a duct 44 communicating with the fuel pipe 42 and with the lower portion of the chamber 39. The duct 44, in communicating with the chamber 39, forms a valve seat upon the upper side of an extension of the bracket 43 for the reception of a vertically reciprocable needle valve stem 46 mounted to be reciprocated by the movement of a float 41 pivotally mounted upon the bracket 43. When fluid fuel and air under pressure are delivered through the pipe 38 to the chamber 39, the oil separates out and co1- lects in the bottom of the chamber while the air passes through the air discharge pipe 4I to the nozzle 29. As the level of the fuel collecting in the bottom of the chamber 39 rises, 5

the float 41 will open the valve 45 whereby the pressure of air within the chamber 39 above the fuel will force the same through the duct 44 and fuel discharge pipe 42 to the nozzle 29. It has been found during periods of non-use, 10 the needle valve stem 46 will stick in the valve seat 45. This invention contemplates the providing in the walls of the bracket 43 surrounding the duct 44 below the valve seat 45 with a screw-threaded opening therethrough below the 15 valve seat and concentric therewith and the insertion of a screw-threaded adjusting member 41a therein which may be so adjusted at the factory as to be contacted by the lower end if the needle valve 46 to support the tapered end there- 20 of within the seat 45 to make just sufficient contact therewith to close the valve and then prevent the same from sticking.

From the above disclosure, it is seen that the combustion chamber is entirely surrounded on 25 three sides by the water to be heated and particularly by the water at its lower temperatures. The target baille 23 prevents the flame from the nozzle 29 from being drawn through the pipes or ilue-s I6 by the draft of the chimney or stack, 30 if possible from the nature of the fuel. In any event, the target baille being concentric with and of substantially equal radius to the line of the centers of the outer pipes or flues I6 directs the heat from the combustion chamber first against 35 the casing I4 thereabout and then into the space between the rear of the target baille and pipe support closure I5 and from thence through the center and surrounding pipes or Ilues I6 to the stack or chimney. These pipes I6 are in con- 40 tinuatior` of the combustion chamber and are each surrounded by the water to be heated between the end closure I5 of the combustion chamber and the more distant end closure 3 of the casing and as the heat from the combustion 45 chamber is diffused by the baille target the temperature of the heated gas passing through each pipe is substantially the same to be transmitted to the surrounding Water.

What I claim is: 50

A Water heater including a casing to contain the water to be heated, a combustion chamber therein surrounded by the water to be heated, a source of heat for said combustion chamber, a plurality of flues leading the heated gases of combustion from the combustion chamber through the water to be heated and through the more distant casing closure, said combustion chamber including a metallic jacket having an end closure supporting the ends of 50 the iiues leading therefrom and a refractory lining terminated short of said end closure, and a circular refractory baille supported by integral extensions from the lining between the end of the lining and said closure.

WALTER W. WILLIAMS.