US2423000A - Water heater - Google Patents

Description

WATER HEATER Filed July 24, 1944 Patented June 24, 1947` c GFFICE WATER HEATER.

Tmfennettgroylsd'en, Manchester', and Edward Hurst, Denton-,Manchester, England', assignorsto themselvesrr and: Gr. Carnerz &:: Co; Limited, Manchester, England, a company of.V Great` Britain.

AgpplicationLJuly 24; 1944, Serial No. 546,356 IirGreatBritain August 3',Y 1943 3 Claims.

This invention comprises improvements v in l or,-

relatingto water heaters;

It is an olbject of thev invention to providefa tical construction.

According to this invention, a water. heater comprises aboilerlof saddle-like section-mounted,

`and having clearance` all round it, in aheat-V insulating casing,.the latter having ahollowbaflle or deflector formation disposed about an opening in-its bottom and constructed Vtoextend-finto the under-space-ofv the boiler in such manner asto.

direct heat from a burner orv re into thisunder- Space so that it is constrained to-iow over the upper and. side wallsV of suchunder-space and subsequently. under the lower edge, and `up onr the outside, of the dependingouter part of the saddlesection boi-ler.

Preferably, theboiler is constructed at the top of the under-space to have a sort of double-wave form in section so that atthe middle there is a downwardly domed part opposite the open` upper end of the hollow baille or deflectorand curved. surfaces running from this part upwardly and then mergingdownwardly into the. side wall or walls of the under-space.

The apparatus is preferably heated by-.a gas-or oil.. burner disposed just below.V the hollowl baille or deflectonand outlet of the productsofjcom.- bustion to a flue or other duct. is at the topof the casing, at the middle, where there maybe a short upwardly tapering or coned chimney or liuc connection.

The boiler is advantageously made of light gauge metal and the heat-insulating casing moulded from a compound of fireproof and cementitious or similar nature.

If desired baffles may be placed in the depending outer part of the saddle-section boiler to improve circulation of the water.

One practical construction ofthe new or improved heater will now be described by way of example, with reference to the accompanying drawing, wherein:

Figure 1 is a central vertical section of the heater, and

Figure 2 is a section on the line II-II of Figure 1.

In the drawing, the heater comprises a boiler I made of light-gauge sheet metal of welded construction, circular in plan (Figure 2) and of saddle-like form in cross-section (Figure 1) in any vertical plane passing through its centre in plan.

2, The cross-section is somewhat of Mshape excepting that the topis at as shown by Figure 1. The under-part oftheMhas a curving double-wave form in section also asshown by Figure l so that, below` the boiler I, lies an under-space bounded attheftop by a surfaceof double-wave section and at the sides by the interior surface of thel dependingouter and peripheral part la of the boi-ler, the curving of the upper surface` formingv a downwardly dome-shaped part 2 in the middle thereof. As will be seen, all parts of the said upper; surface present desirable spherical or like curves :to favour flow ofthe heat applied in this caseA by aring type gas tourner.` 3.

The boiler I is enclosed by a casingdof asbestosv compound, the walls of the-casing being spaced from those of the boiler to allow iiow ofheat around the boiler as indicated by the feathered arrows irr FigureA 1; This casing 4 generally is more orless cylindrical and advantageously made two parts, one a. lower or pan-like part 4a which` is' recessed andfflanged around its mouthat 5. to' receive, spigot-wise, the lower edge of the other or upperpart 4b which is somewhat of inverted pan shape. The lower part of the casing is` centrally perforated` at the bottom and extending all round' the perforation is a hollow upwardly-tapered or truncated conical baffle or deflectorformation 0, the gas burner S-being placed just below ther-bottom beneath the hollow space of this lbaille or deflector. The topopening 'Il of the bafleis larger than the downwardly domeshaped` part 2'fof the boiler I and is within the under spacel of the boiler as` will` be apparent from Figure l. The top 4c of the casing 4 is of shallow conical form with an opening in the middle about which is formed a short hollow upwardly extending and tapered or truncated conical chimney part 8 through the upper end of which the gases of combustion of the burner escape to a flue or other duct or outlet.

The interior of the boiler I may be fitted in the depending part Ia with part-annular baille plates. There may be two of these plates marked 9, Ill and they fill the distance across between the inner and outer walls of the part la and are spaced one above the other with .the lower one I0 spaced above the flattened lower edge wall of the part Ia of the boiler. At one side, and at the lower end beneath the lower baffle ID, this boiler part Ia has an opening for a water inlet pipe II to lthe boiler, the companion outlet pipe I2 being at the top of the boiler on the side diametrically opposite the inlet pipe, see Figure 1. The top part-annular baffle 9 is out away or gapped, as

at I3, above the water inlet opening of the boiler for passage of water to the main or upper part of the boiler. The other baffle Ill is cut away or gapped diametrically opposite to the cut-away part of the rst baille, as at I4, so that the water takes a circuitous or zig-zag course from the inlet Il to the upper part of the boiler as indicated by the plain arrows in Figure 1.

Owing to the shape of the upper surface of the under-space of the boiler and the construction of the hollow baille or deector 6 at the bottom of the casing 4, the heat or hot gases of combustion from the gas burner is or are directed on to the downwardly dome-shaped part or head 2 on the under side of the boiler and, because of the curvature of this part, the heat or gases then become dispersed around the same and down the inner side of the depending outer and peripheral part la of the boiler, thereupon spreading out beneath the lower edge of the part la, then rising up the outer side of the part la and the top part of the boiler, and finally moving along the at top of the boiler to the central flue outlet or chimney 8. All angles or corners both of the boiler I and of the casing 4 are suitably curved to favour flow of the heat or gases (see Figure 1) and it will be realised that very efcient heating of the water is attained, favoured by the bailies 9, I 0, in the interior of the boiler, which direct the water evenly round inside the boiler and ensure maximum heat absorption.

The construction thus described is capable of providing a desirable water heater of unit construction because both boiler l and casing 4, if desired with the burner 3, can be assembled as a unit ready for installation, as such, as and where desired.

In another example of the new or improved apparatus, the boiler instead of being of cylindrical contour is of elongated form. Thus in plan it may be semi-circular at the ends and these ends be joined by a parallel sided part so that the plan shape in general is somewhat elliptical. The depending outer or peripheral part of the boileris, of course, of similar shape and the downwardly dome-shaped part in the middle of the top of the under-space of the boiler is also elongated. The heat-insulating casing with its hollow baille or deector formation, and, if desired, the gas or oil burner, would also have corresponding shape as will be understood.

Naturally, other modifications of the construction are possible without departing from the spirit and scope of the invention which is hereinbefore broadly outlined and enables a unit construction of water heater to be so favourably attained.

What we claim is:

1. A water heater comprising a boiler of saddlelike section in all vertical planes passing through its centre in plan, this boiler being mounted, and having substantially uninterrupted clearance all round it, in a heat-insulating casing, the latter having a hollow baille or deflector formation extending all round a central opening in its bottom and constructed to extend into the underspace of the boiler with substantially uninterrupted clearance all round between itself and the wall of said underspace and the top of said casing being spaced from the top of said boiler and having a central opening, whereby heat from a burner or fire directed by said baille or defleetor formation into saidrunderspace will be constrained to flow over substantially the whole of the upper and side walls of such underspace, substantially wholly around and under the lower edge and up on and substantially wholly around the outside of the depending outer part of said saddle-section boiler and finally over substantially the whole of the top of the boiler to said central opening in the top of said casing.

2. A water heater according to claim 1, wherein the boiler is constructed at the top of the underspace to have a sort of double-wave form in vertical section so that at the middle there is a hollow downwardly dome-shaped part opposite the open upper end of the hollow baiile or delector with curved surfaces running smoothly from said part upwardly and then smoothly merging downwardly into the side wall of said under-space.

3. A water heater according to claim l, wherein battles placed in the depending outer part of the saddle-section boiler are arranged to cause circulation of the water in Zig-zag manner in said part.

TOM BENNETT. EDWARD HURST.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Certificate of Correction Patent No. 2,423,000. June 24, 1947.

TOM BENNETT ET AL.

It is hereby certified that the name of the (zo-assignee in the above numbered patent was erroneously described and specified as "G. Garner & Co. Limited Whereas said naine should have been described and specied as G. Comer c Oo. Limited, as shown by the record of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofhce.

Signed and sealed this 21st day of October, A. D. 1947.

THOMAS F. MURPHY,

Assistant 'ommzssz'oner of Patents.

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