US1868186A - Water heater - Google Patents

Description

8 Q60 @QQ jifl eri 127m" 7 0% Allomy Patented July 19, 1932 PATENT ALBERT Acxnoiv; or NASHVILLE, TENNESSEE WATER HEATER Application filed ctober 17, 1930. Serial No. 489,446.

This invention relates generally to water heaters and particularly to a gas water heater employing a short flame burner, and thermostatic and steam pressure means associated with the heater for controlling the supply of gas to the burner. 1 7

It is an object of this invention to provide a short flame burner in an improved water heater embodying convolutions of heater tubes in layer formation having the convolutions vertically staggered, and the burner plate apertures arranged to follow'the contour of the convolutions ofthe water tubes, andthermostatic means associated with water tubes for operatinga lever engaging the gas cut off valve in the gas supply, when the temperature of the water reaches a predetermined point, at which time the gas supply will be diminished or shut off, and steam pressure responsive means for operating said valve in event of failure of It is also an object of this invention to provide a short flame gas; burner water heater which is adapted to extraordinarily quickly heat water circulated therethrough and which has the novelty and advantages which will be better understood'as the specification proceeds, and which in addition is simple and cheap to operate and manufacture and is otherwise admirably adapted for the purpose for which it is designed.

These and other objects, the nature of the invention, its composition and arrangement and combination of parts will be readily understood by anyone acquainted with the 'art to which thisinvention relates by consulting the following descriptions of the drawing in whichi I Figure 1 is a generalelevational view partly in cross section of my improved gas water heater disclosing the arrangement and disposition of parts thereof, and a Figure '2 is a plan view of Figure 1 the upper portion of the casing removed and showing details of my improved water heater partially in cross section and V Figure 3 is a top view of the burner showing thejets or apertures arranged to'follo w the convolutions of thewatertubes,"

the thermostatic means to OFFICE" Figure 4 is a detail horizontalcross sectiona I a1 view of thesupply valve and thermostatic and steam actuated mechanism,

Figure 5 is an enlarged horizontal" cross sectional view through the gas shut off valve. Referring in detail to the drawing it will be seen that I provide a flat circular burner, r

5 provided with a central aperture 6 for accommodatingan uprushing air draft and provided on its upper surface with a multiplicity of apertures ,7 disposed and arranged V to follow the contourof the water tubes generally designated 8. a

- Legs 9 are provided for supporting the water heater upon a surface, and these consist of angularly disposed straps having laterally projecting feet portions, the upper ends of the straps being suitably secured to the under side of the heater structure} "Supported by the burner isa casing generally low open bottomed cylinder formed by an annular ring being provided with a depending annular flange 13 which is spaced laterally 10 designated 11 which is in the form of a sha'lcylindrical formation 11, andthisis provided centrallyv of its upper wall with a-rising flange '15 which may form a pipe connection for a pipe arranged to convey away the prodnets of combustion of the burner.

Water pipes or tubes 8 are arranged. in two or more superposed layers and arranged in concentric convolution in each layer .con-V nected by a portion which reaches from the upper to the lower and center convolutions thereof. The convolutionsjust referredto are designated 16 and 17 respectively and the connecting tube therebetween 18L j y The convolutions of each layer are arranged so'that the convolutions of the next lower layer are disposedunderneath the space between the upper adjacent c'onvolutions, so that the flames from the burnerare V closely impinged upon all of the tubes, and the greatest advantage secured fromthe heating power of the burner. An outlet section of tubing is passed through the wall of the houslng or casingat' one side thereof preferably opposite to the inlet section 20.

The inlet section of tubing is provided with a'T-shaped' fitting 21 which connects with a water supply pipe 22 atright'anglos shut off the s pp of Water to'ther'heating I thereto. 1A mushroom valve 23 ope rated by a hand wheel 24 closes the opening of the supplypipe 22 as at 25 when it is deslred to tubes. A strip of preferably perforated aluminum, perforated to offer the least resistance to the passage oft-he water, is arranged as indicated at 26 for a suitable length in the section 20 of the convolutions of the tube,

'fso as to be quickly and readily affected by the heat of the water.

Theouter end of the thermostatic strip 26 7 is indicated at 27 and it passes through, as shown in Figure 4, the section 20, loosely through an aperture 28 in a wall 29 at the rear end of-the portion 30 forming a chamber and having a closed end 31 apertured at 32to receive a slidable rod 33 provided with a projecting pinfi t, the rod 33 being provided at its inner end with apiston 35 which is nor.- mally maintained against the. wall29 by a coiled spring 36 engaging against the end 31 and thesaid piston 35. p The portion 27 of the thermostatic strip, moves through the aperture 28, upon expansion of the strip and displaces the piston against the spring36 gas valve, the. steam-passing through the aperture 28 in thewall 29 to build up pressure behind the piston. The end of the thermostatic strip freely contacts with the piston, and it is not secured to the piston;

V The numeral 37 designates generally an air gas mixing valve associated with the burner 5 and between the gas supply pipe .mostatic strip projects itself against the pis- 38 and said mixing valve is a cut off valve 39, which has instead of the usual hand wheel or hand lever, a gear wheel 40 on the upper end of the valve.

apin 42 is a lever 43 having a rea-rwardly extended straight portion lt slotted as at 45 longitudinally thereof at the end for re-' ceiving slidably the pin 34 described above. -The lever 43 is provided with a segmental gear/L6 which engages with the gear 40.

It is thought to be obvious'that as the therton 35 to actuate the rod 33outwardly that it will actuate the cut oil valve 39, to affect the flow of gas'from the supply pipe 38 to .the

gas: mixing valve V The same effect is achieved by an over pressure of steam on the piston 35; I

Obviously the preferable arrangement 1s fore, I have provided means for quickly out that the gas supply shall be gradually and partly or wholly diminishedby the expanding action of the thermostatic strip. Thereting off the supply of gastotheextent nec- 'essary to properly control the heating tem perature of the burner, forsupplyingauniforniproperlyheated supply of hot water. The burner is especially constructed for quick heating by .means of short flames, di-

rectly in contact with each ofthe convolutions of the water heating tubes.

so Itv is thought to be obvious that as the temperature in the water heatin .tubes rises 7 above a certain point, the contro device pro vides that the gas supply be gradually diminished until the desired temperature of 'water is reached, or if below the desired temperature a ,contractionof thethermostatic strip would result inan increased supply of gas. Thus control'for the burner in relation to the temperature in the heating tubes eliminates all waste of fuel in connection with the use of the burner.

tions of the tubes is provided 'for-highefliciency of'heating. Thus it will'be' under-' The conforming of thejets to the convoluposed of few and readily replaceable, and i durable parts.

' The provlsion of the perforated and preferably aluminum thermostatic strip 36 is calculated to provide a very sensitive and re- 1 Having thus describedmy inventiomwhat I I claim as newis:

' Supported on abracket' tl and pivoted on I L In a gas water heater the, tyPQdQ scribed, a water heating" element comprising .sponsive mechanism. It obvious that the inner end of the strip 26 is: suitably fastened within the tube. 1 o It ,islto be definitely u'nderstoodthat I .do

being disposed between adj acent convolutlons of the next lower coil, a-shor-t flame type gas burner beneath said element, said burner having spirally positioned jets formed. and

positioned to-impingeagainst' the convolutions of the lowest coil the hottest'portion of their gas flames, the remaining"portior'i of the flames being 1 permitted to pass around the convolutions of thesaid lowest coil pinge the hot tip of the flame against said a directly heat the convolutions of the superposed coils.

2. In a water heater of the type described, a heating coil composed of a plurality of superposed, continuous spiral pancake coils, and a gas burner of the short flame type having a multitude of jets arranged so as to imconvolutions indlvidually, said jets being arranged so as to follow the curvatures of said convolutions, the convolutions of any superposed pancake coil being arranged above the spaces between and separating adj ace-nt convolutions of the next lower pancake.

In testimony whereof I affix my signature.

ALBERT ACKRON.

Images