US1695352A - Heater for domestic boilers - Google Patents

Description

Dec; 18, 1928. 1,695,352

T. H. STAMP HEATER FOR DOMESTIC BOILERS Filed June 21, 1926 L J i 3/ J 10 4 13 1 1 Z? r a a J 11 19 v 16 4 H if I .r a 7 DEB 1.9 75 jg 35 76 125.

19 a 11 I 75 fl Patented Dec. 18, 1928.

UNI TED STATES THOMAS H. s'rAMr, oF sUFrALo, new YORK.

HEATER on DOMESTIC BOILERS. j

Application filedJune 21, 1926. Serial No. 117,343.

This invention relates to the type of heaters designed more particularly for domestic water boilers and comprising a heat-confining jacket partly or whollysurrounding the boiler and having a burner in its lower portion for heating it. i v

One of the objects of the invention is the improvement of the heater with a view of keeping its outer side cool and at the same time holding the rising current of hot air closely against the boiler to heat it more ef :t'ectually and in less time.

A further object is to so construct the heater as to effect complete combustion of the gas before being allowed to escape through the exit flue.

In the accompanying drawings Figure 1 is a side elevation of a domestic water boiler equipped with the improved heater. Figure 2 is an enlarged vertical section of the heater applied to the boiler. Figure3isahorizontal section on line 3-3, Fig. 2. Figure 1 is a detached fragmentary side elevation of the supplemental heater. Figure 5 is a horizontal section of a modified form of the heater.

Similar characters of reference indicate corresponding parts throughout the several views.

10 indicates a domestic boiler of the usual cylindrical form. It may be mounted on the customary stand 11.

In the embodiment of the invention shown in Figs. 1-3, the heater consists of a segmental jacket or casing 12 of suitable height which extends around about one-third of the circumference of the boiler and is provided in its lower portion with a burner 13, preferably a gas burner, and at its top with an exit pipe 14.-

The jacket is open at its inner side to expose the surface of the boiler directly to the flames of the burner and the ascending hot air; and, as shown in Fig. 2, the jacket is provided at its upper and lower ends with segmental rims or bearing- faces 15, 16, which conform to and are tightly fitted against the side of the boiler and the upright edges of the jacket are like.- wise fitted against it to prevent the escape of the hot-air and products of combustion at those points. The jacket is clamped to the boiler by a U-shaped belt or strap 16", or other means. Otherwise, the jacket is closed on all sides, excepting a horizontal row of airinlets 17 in its lower portion just above the burner.

In its preferred form, the upper portion of the jacket is contracted or tapered upwardly, as shown at 18,'while its lower portion 19, which contains the air inlets l7is enlarged beyond the radius of the body and the base of the heater to provide an ample air and mixing chamber. The burner may be of any appropriate construction, that illustrated in the drawings consisting of a horizontal gas conduit or chamber 20 extending throughout the base of the jacket and cast integral with it and provided in close proximity to the boiler-wall with one or more rows of openings 21 through which the gas issues in numerous ets directly against the boiler. A gas supply pipe 22 having an'air-mixer 23 of any suitable construction is connected to the burner-conduit.

Arranged in the heating jacket about midway between its wall and the wall of the boiler is an imperforate upright partition 24:. This partition is concentric with the wallof the jacket and preferably rises from about the horizontal center line of the air-inlets 17 to the base of the reduced top 18 of the jacket. The partition forms with the jacket wall an outer non-conductive space or passage 25 through which the air entering the inlets 17 Y rises, keeping the outer side of the jacket comparatively cool. The space 26 between the partition and the boiler form a hot-air flue, the partition confining the ascending current of hot air against the boiler, thereby obtaining the maximum effect and expediting the heating ofthe water to the required temperature.

By extending the partition down to the air inlets 17 practically complete combustion of the gas takes placein the lower portion of the hot-air flue 26 adjacent to the gas burner, with the result that the gas products are fully burned before reaching the top of said The partition, by forming this cooling flue, does away with the usual jacket-lining of asbestos or other non-conductive material.

A water-circulating device 28 may be arranged in the hot-air flue 26, for heating the water in the boiler. For -example,this device may consist of upper'and lower manifolds 29, 30 connected by water-circulating tubes 31, the manifolds communicatingwith the boiler'by pipe- connections 32, 33.

It has been found in practice that a segmental jacket, embracing about one-third of the circumference of the boiler, is suflicient toheat the water to the required temperature and having bearing faces conforming to a water boiler, the jacket being provided in its base with a burner and having air inlets in its lower portion above the burner, and an in'iperfolt-ite upright partition arra 'gged in the jacket about midway between its outer Wall and its bearing faces, forming an air between the jacket and the partition, the lower end of the latter terminating near said air inlets.

A heater of the character described, comprising a jacket open at its inner side and having bearing faces conforming to a Water boiler, the jacket having a burner and an exit, partit e in th ja k t b e n its IURI wa a t h a ng f e di p eed 911- nt aially h rewith, the ja k t av ng a r inlets in the lower portion of its wall, and Wat eireula ng mean l ated o th nne side of said partition.

THOMAS H- MP.-

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