US1608905A

US1608905A - Heat-conducting tube and method of making the same

Info

Publication number: US1608905A
Application number: US720737A
Authority: US
Inventors: Joseph B Murray; Jr Thomas E Murray
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-06-18
Filing date: 1924-06-18
Publication date: 1926-11-30
Anticipated expiration: 1943-11-30

Description

Nov. 30, 1926. 1,608,905

J. B. MURRAY ET AL HEAT CONDUCTING TUBE AND METHOD OF MAKING THE SAME Filed June 18, 192

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Patented Nov. V30, 1926.

\ U ED" STATES P NT JOSEPH B. MURRAY AND THOMAS E. MURRAY; JR. OF BROOKLYN. YORK.

HEAT-CONDUCTING TUBE AND METHOD or MAKING THE shivinl' Application filed June 1 8,

In certain prior applications, Nos. 642,- 427 filed May 31, 1923, and 642,725 filed June 1, 1923, there is described a certain hollow construction for walls and other parts of boilers or heaters and made up of tubes of reztangular, circular or irregular crosssection with fins or flanges extending lengthwise thereof so as to provide a heating surface exposed to the heating gases greater than the surface which is in contact with the water or other fluid in the tube.

The presentinvention provides a unit and a method of producing the same from which such boiler walls and the like may be built. The accompan ing drawings illustrate embodiments of t e lnvention.

Fig. 1 is a horizontal section of a side wall of a boiler built with the tubular units of the invention;

Figs. 2 to 5 are plans of various forms of units made in accordance with the invention. a

In an application co-pending herewith, Serial No. 715,369, filed May 23, 1924, there are described special forms of units and methods of production thereof. The present application covers specifically distinct constructions for such units.

According to Fig; 1, an inner wall or screen for a boiler is made of tubes 1 each of which has at one side a lateral flange 2 extending to the next tube and approximat'ely closing the space between the two tubes, while leaving freedom for relative movement under the distortion produced by heat. Back of the screen thus described is an ordinary boiler wall made of refractory bricks 3, insulating tiles 4 and a shell 5 of sheet steel.

The present application is directed to the production of units for the building of such a wall in which the flanges on the tubes are integral with the walls of the tubes 1. This result is obtained in Fig.2 by bending a sheet, leaving a portion '2 flat to form the flangeand bending the remainder around to form a tube 1 with its free edge abutting the part 2 at its inner edge,.and arc welding the edges together by means of deposited metal 6, or butt welding them, or uniting them by both means. I

Fig. 3 is similar to Fig. 2 except that the free edge of the tube 1 is flanged and lapped 1924. Serial N0. 720,737.

over the inner edge of the part 2, as at g; the parts being welded together as beore.

There are advantages in providing two flanges on each tube, one at either side, since a given space between adjacent tubes can be covered with flanges of less width, which provide shorter paths for transmission of the heat to the tubes. For obtainin two integral flanges the arrangementof Fig. 4 is suitable. Here the unit is made of two identical piezes each with a flat flange portion 8 ant a substantially semi-circular portion 9; the edges of the parts 9 being butted against the inner edges of the parts 8 as shown and welded as in the previous cases. Generally speaking it appears preferable that each tube with its flange or flanges shall constitute a separate unit. But there are cases in which it may be desirable to make up one complete unit of two or more tubes. Fig. 5 illustrates a construction of this sort. The unit is made of two pieces of sheet metal each comprising an outer flange 10 with an adjacent semi-circular portion 11, an intermediate web or flange 12 and a second semi-circularportion 13, these parts being brought together'so as to form two parallel tubes with an intermediate web and with flanges 10 at the sides and being welded together as at 6 and preferably s 0t welded as at 14 to prevent separation o the parts 12 under the pressure within the tubes. Units of this sort will be placed alongside of one another, as indicated at the left of the H figure, with the respective flanges 10 over lapping.

Though we have described with great particularity of detail certain embodiments of our invention, yet it is not be be understood therefrom that the invention is restricted to the particular embodiments disclosed. Various modifications ma be made by those skilled in the art wit out do arture from of which: constitutes the flange portion of section throughout its "length, and welding 10 the unit and another portion of thewidth the bent around edge in a continuous lengthof which sheet is bent to form the tube; wise joint leaving the remaining" portion I 2. The method of making a tubular heat of the width of the sheetv as an integral 5 conducting unit for boilers and similar agflange extending lengthwise of the tube.

arat'us which consists in forming a, tu e )y bendin around a portion of the width of signed our names. a sheet w ich is continuous throughout its JOSEPH B. MURRAY. length so as to form a tube of closed cross- W v v THOMAS E. MURRAY, JR,

In witness whereof, we have hereu'ntoill