US1370983A - Sheet-metal vessel - Google Patents

Description

S. McQUIRNS. SHEET METAL VESSEL.

APPLICATION FILED JUNE 5,1919.

1,370,983. Patented Mar. 8, 1921.

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UNITED STATES PATENT OFFICE.

STEWART MOQUIRNS, OF CONSI-IOHOCKEN, PENNSYLVANIA, ASSIGNOR TO JOHN WOOD MANUFACTURING COMPANY, OF CONSHOHOCKEN, PENNSYLVANIA, A CORPORA- TION OF PENNSYLVANIA.

: SHEET-METAL VESSEL.

Application filed June 5, 1919.

To all whom it may concern:

Be it known that I, STEWART MoQuInNs, a citizen of the United States, residing at Conshohocken, in the county of Montgomery and State of Pennsylvania, have invented a certain new and useful Improvement in Sheet-Metal Vessels, whereof the following is a specification, reference being had to the accompanying drawing.

My invention is particularly applicable to water containers of gas water heaters, of the type including an outer cylindrical shell having a bottom closure which is spaced above the bottom edge of said shell to such an extent as to form a combustion chamber in which the gas burner is inclosed, except at the bottom. As ordinarily constructed, such a closure has a downwardly depending cylindrical flange, tightly fitted in the outer shell and connected therewith by rivets extending through said flange and shell. However, it is difficult to maintain such a joint tight, owing to the irregular expansion and contraction of said members when subj ected to the heat from the burner. Although attempts have been made to make a permanently tight joint by welding such a closure flange to such a shell; the heat of the welding operation leaves a zone of distorted metal in the outer shell, which is, of course, visible and unsightly.

Therefore, it is the principal object of my invention to provide a method and means for making such a joint permanently tight without riveting or welding and, as hereinafter described, my invention includes the provision of an annular channel in said shell, by pressing the latter outwardly, in a narrow zone, of smoothly continuous configuration, and in such position that it will hold an annular band of fusible metal, which is fused therein, between the inner face of said shell and the outer face of the flange on the closure, at the lower edge of the latter.

My invention includes the various novel features of construction and arrangement hereinafter more definitely specified.

In said drawing: Figure I is a fragmentary vertical sectional view of the lower end of a vessel embodying my improvement.

Fig. II is an inverted plan view of said vessel.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Serial No. 302,020.

In said figures: 1 is a cylindrical tubular shell, having an outwardly projecting zone 2, conveniently formed by a rolling operation, to form the internal channel 3 which-is smoothly continuous. The closure 5 is con veniently formed of a pressed sheet metal plate having the downwardly depending flange 6 tightly fitted in said shell 1, so that its lower edge overhangs said channel. Although I have shown said shell 1 provided with the annular inwardly extending bead 8, also conveniently formed by a rolling operation, to serve as a stop limiting the position to which said closure maybe forced into said shell; such limiting means may be omitted.

As indicated in Fig. I; said channel 3 holds a band of fusible metal 9, which may be brass spelter, or other suitable material which has been fused so as to extend into and seal-the joint between said shell 1 and closure 5.

Although I have shown said closure flange 6 extending only part way across said channel 3; because I find it convenient to thus permit the operator to inspect the fusible element of the joint, while it is being fused, and thus be certain that a continuous seal is made; it is to be understood that said flange may extend entirely across said channel and thus entirely conceal the fusible metal band therein, if desired. Moreover, although I have found it convenient to illustrate my invention as embodied in a water receptacle of the specific type above contemplated; itis to be understood that I do not desire to limit myself to vessels of that specific type, as my invention may be advantageously employed in forming such closures in sheet metal vessels of any kind.

Therefore, I do not desire to limit myself to the precise detailsbf construction and arrangement herein set forth, as it is obvious that various modifications may be made therein, without departing from the essential features of my invention, as defined in the appended claims.

I claim:

1. A sheet metal vessel comprising an outer shell of circular form; a closure for said shell, comprising a plate having a flange fitted to said shell; means limiting the relative position of said shell and closure plate,

the oint between them.

and sealing means in said channel, including an annular band of fusible metal engaging the 1nner surface of said shell, and the outer surface of said closure flange, and sealing 2. A sheet metal vessel comprising an -outer shell; a closure for said shell, comprising a plate havinga fiange'fitted to said shell; an annular channel in said-shell, at the region of saidclosure flange, formed by an outward extension of the metal of said shell; and sealing means insaid channel, in-

cluding an annular band of fusible materialengaging the inner surface of said shell, and

the outer surface of said closure flange, and sealing the joint between them.

3. A sheet metal vessel comprising an outer shell; a closure for said shell, com prising a plate; a channel in said shell, at the region of said closure; and sealing means in said channel, inside of said shell and outside of said closure, including fusible ma terial engaging the innersurface of .said

shell, and the outer surface of said closure,

and sealing the'joint between them.

In testimony whereof, I have hereunto signed my name at'Conshohocken, Pennsyl- Vania, this 28th day of May, 1919.

STEWART MoQUIRNS.

WVitnesseszf v FRANK C. HAMILTON, JOSEPH W. WINTER.

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