US1999037A

US1999037A - Hot water heater

Info

Publication number: US1999037A
Authority: US
Publication date: 1935-04-23
Anticipated expiration: 1952-04-23

Description

April 23, 1935. H, 5, Dow 1,999,037

HOT WATER HEATER Filed May '25, 1953 mvcn'rna fiziawwa Patente cl- Apr. 23, 1935; I i p I I um'rsof "STAT' 'ES' PATENT fort es.

1 it Henry S. Dodd, Toronto, Ontario, Canada, as-

. signor to Canadian Chrornalox Company Lim-' ited, Toronto, Ontario, Canada Application May 25, 1933, Serial No. 672,829 I 7 Claims. (01. 219-38 i *This invention relates to heaters of the electric and 6, may be removed through the upper end type, in which a boiler has one or more vertically of the tank. arranged tubes extending therethrough, in which Withinthe tubes 8 are locatedthe heating eletubes are positioned heating elements packed in ments. The heating elements employed may be t '5 sand 'or other powdery material. The leads for of various types, but I preferably employ a the element are usually connected at the top. In sheathed element 9 in which theresistance is imuse the elementexpands and contracts, as it is bedded in a powdered refractory material com.- he'ate'dup and cools. The result is that as the 'pacted under pressure. As the elements 9 do I element contracts or shortens, the sandor other not fill the tubes 8, and to prevent the elements 10 packing material slides in below the 'element,confrom damage through Warping, the tubes 8 about 10 sequently when the element is again heated, the the elements are filled with powdered Lmaterial expansion must all take place in the upward di- 9, pre a y What is Commercially known as rection on account of the difliculty in working silver sand. The lower ends of the tubes are down into the packing which has slid down below p v ded w t pw c in the d w a e the element. This sequence is followed over shown as reducing couplings, the bottoms being 15 and over, and each time the element cools and closed by plugs 52. t I contracts, more and more packing slides downbe- As stated in the preamble of the specification, low it with the result in time the element reaches it is desired to prevent the upward creeping of the top of the tube, and either forces off the cap the elements 9 due to expansion and contraction,

or causes a bending and breaking down of the and I therefore provide means for anchoring the 20 element. I elements 9.

My object therefore, is to devise a construction The anchoring means comprises a hook memwhich will prevent this upward creeping of the her IS, the hook of which extends through a hole' element, and I attain my object by means of the in the end of the element casing and has a nut 2.3 constructions hereinafter described and illus- I1 set up thereon. The stem of the hook memtrated'in the accompanying drawing in which her extends through a hole in the plug l2, and Fig. 1 is a vertical section of a water heater has a nut 18 above the plug and a nut i9 below constructed in accordance with my invention; the plug to lock the hook member in position.

Fig. 2 a cross section through the same; and The element casing stops short of the upper end so Fig. 3 a detail on anenlarged scale of the eleof the tube so that it is free to expand upwardly 3o 'ment anchoring means. in the powdered filling.

In the drawing like numerals of reference in- In the event of abreakdown in an individual clicatecorrespondingparts in the different figelement, the nut I9 is first removed, then the ures. plug l2, which allows the powdered material to 3 I is a cylindrical casing having an inwardly escape, and the element may then be removed directed flange 2 at its upper end and an inwardly through the upper end of the tube. The plug l2 directed flange 3 at its bottom, the lower flange will then be replaced, a new element placed in being of greater width than the upper flange. position and anchored by screwing on the nut I9,

. v To the upper flange 2 is secured outside the and the tube again filled with powdered material.

40 tank the upper closure member 4 by means of The heater may be provided with sleeves I3 40 studs or bolts 5. To the lower flange 3, by studs encasing the tubes 8 for the purpose of causing a or bolts 6, is secured within the tank the closure circulation within the tank. To facilitate re- 7 member I, which closure member is of a size to moval, the sleeves may be formed in two halves permit its withdrawal through the top of the secured together by screws I4 or the like and will tank when the closure member 4 is removed. besupported on brackets 15 mounted on the sides am Suitable packing will be interposed between the of the tubes 8. With this arrangement, when the closure members and flanges to make the joints elements are in use, the water as heated, tends watertight. to travel upwardly between the tubes and sleeves,

The closure members 4 and I are provided with the coldwater moving downwardly outside the v a plurality of alined holes and in these holes are sleeves. I V a positioned tubes 8. Three are shown in the What I claim as my invention is:

drawing although any desired number may be 1. In an electric heater, the combination of "a.

employed. The closure members 4 and I and the vertically arranged tubular member; a sheathed tubes 8 are secured together to form a unitary heating element within the tubular member; a

construction, which, after removing the studs 5 closure for the lower end of said tubular member;

and pulverized material surrounding said element within the tubular member, said heating element having the lower end of its sheath anchored to prevent upward movement, and its upper end free to expand upwardly.

2. In an electric heater, the combination of a vertically arranged tubular member; a sheathed heating element within the tubular member; a closure for the lower end of said tubular memher; and pulverized material surrounding said element within the tubular member, said heating element having the lower end of its sheath anchored to said closure to prevent upward movement, and its upper end free to expand upwardly.

3. In an electric heater, the combination of a vertically arranged tubular member; a sheathed heating element within the tubular member; a removable closure for the lower end of said tubular member; and pulverized material surrounding said element within the tubular member, said heating element having the lower end of its sheath anchored to prevent upward movement, and its upper end free to expand upwardly.

4. In an electric heater, the combination of a vertically arranged tubular member; a sheathed heating element within the tubular member; a removable closure for the lower end of said tubular member; and pulverized material surrounding said element within the tubular member, said heating element having the lower end of its sheath anchored to said closure to prevent upward movement, and its upper end free to expand upwardly.

5. In an electric heater, the combination of a vertically arranged tubular member; a sheathed heating element within the tubular member; a closure for the lower end of said tubular member, said closure having a hole formed therethrough; pulverized material surrounding said element within the tubular member; a hook member having its hooked end engaging the lower end of the sheath said element and its stem extending through said closure; and a nut on said stem below the closure, and its upper end free to expand upwardly.

6. In an electric heater, the combination of a vertically arranged tubular member; a sheathed heating element within the tubular member; a closure for the lower end of said tubular member, said closure having a hole formed therethrough; pulverized material surrounding said element within the tubular member; a hook member having its hooked end engaging the lower end of the sheath said element and its stem extending through said closure; a nut on said stem below the closure; and a nut on said stem above the closure, and its upper end free to expand upwardly.

7. In an electric water heater, the combination of a casing; a tubular member within the casing and having its ends extending through the top and bottom thereof; a sheathed heating element within the tubular member; a closure for the lower end of said tubular member; and pulverized material surrounding said element within the tubular member, said heating element having the lower end of its sheath anchored to prevent upward movement, and its upper end free to expand upwardly.

H. S. DODD.