US2557760A - Radiator - Google Patents

Description

June 19, 1951 E. G. POWELL HAL 2,557,760

RADIATOR Filed Sept, 16, 1947 4 Y 2 Sheets-Sheet l 6 m mzzmw ffirile qs Patented June 19, 1951 RADIATOR Ellis G. Powell, Oscar G. Johnson, and Albert J. Olson, Michigan City, Ind., assignors to C. A. Dunham Company, a corporation of Iowa Application September 16, 1947, Serial No. 774,216

2 Claims. (Cl. 257-262.16)

This invention relates to radiators, and more particularly to an improved structure for holding radiator fins on a tube to increase the radiating surface and maintain a good conduction.

The primary object of the invention is to provide an improved radiator wherein each of the fins has a tapered ferrule which is locked against movement by the wedging action of a small tongue provided on the next adjacent ferrule.

A further object of the invention is to provide an improved fin which has a rectangular perimeter with rounded corners, and has its marginal portion offset from the body of the fin.

In the preferred construction, a ferrule is stamped in each fin to fit over the tube, and the wedging action of the small tongue of one fin, when the ferrules are forced together, causes a mating recess to be formed in the adjacent fin, so that good contact is maintained and the fin is locked against rotation with respect to the tube. By this arrangement, the resiliency of the ferrule keeps a constant tension between the ferrule and the tube, and this contact is maintained tightly during the expansion and contraction of the parts as the radiator is heated or permitted to cool. I

The invention is illustrated in a preferred embodiment in the accompanying drawings, in which:

Figure 1 is an elevational view of a radiator embodying the invention; Fig. 2, a vertical sectional view, taken as indicated at line 2-2 of Fig. 1; Fig.3, a plan sectional view, taken as indicated at line 33 of Fig. 1; Fig. 4, an enlarged fragmentary plan sectional view, taken as indicated at line 4-4 of Fig. 3; Fig. 5, an elevational view of one of the fins; and Fig. 6, a side elevational view of one of the fins.

In the embodiment illustrated, a metal tube or pipe 1 is provided with threaded ends 8 for connection with a piping system. A number of radiating fins 9 are fitted tightly together on the pipe 1, to give the desired length. Each of the fins preferably has a rectangular perimeter Ill provided with rounded corners II. The outer marginal portion I2 is offset forwardly from the main body of the fin and makes the fin quite rigid. A hole i3 is punched at the center of the fin to fit snugly around the pipe I. and a ferrule H extends forwardly. The ferrule has a rounded base portion, as indicated at I5. Preferably, a fin for a 1% inch pipe has a radius of curvature of about a; of an inch.

As best shown in Fig. 6, the front edge of the ferrule I is provided with a short forwardly extending tongue I6 whose forwardly extending edges form an angle of about In a fin for a 1% inch pipe, the tongue is preferably about of an inch in length.

To assemble the unit, the fins 9 are mounted on the pipe I and forced together in a press so that, as indicated in Fig. 3, the tongue l6 will be wedged between the tube and the forwardly adjacent ferrule. The tongue will bend the ferrule slightly from a true circle and distort the metal as shown at ll. This causes a tight fit which locks the fin against rotation with respect to the tube, and maintains a tight fit between the parts at all times. The front ferrule is welded to the pipe, as indicated at I8, and the rear ferrule is also welded, as indicated at l9.

It will be seen that the ferrule is relatively short, so that its side walls will not be cracked during the forming operation, and the elasticity of the metal will cause a close contact to be maintained constantly. After the adjacent tongue has been wedged into the concavity of the ferrule, the ferrule is placed under tension and the side opposite from the tongue is pulled tightly against the tube.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, for some modifications will be obvious to those skilled inthe art.

We claim:

1. A radiator comprising, a tube, and a plurality of metallic spaced radiating fins, each of said fins having an integral substantially cylindrical resilient spacing ferrule mounted on said tube with a tight fit, each of said ferrules joining the web of its respective fin by a rounded portion forming a fillet, the end edge of each ferrule away from said fillet being in a plane parallel with the plane of its respective fin web and serving as a spacing abutment to engage the fillet of the next adjacent fin, said end edge of each ferrule having a single short forwardly extending pointed tongue, the tongues of the assembled fins and ferrules each seating in an outwardly deformed pocket in the fillet of the next adjacent fin, each of said pockets lying within the rounded portion of said fillet and falling short of the cylindrical portion of the ferrule, whereby the resiliency of each ferrule will cause it to tightly grip against the outside of the tube for increased heat conduction contact.

2. A radiator as claimed in claim 1, in which the radius of each fillet is of the order of a; of

an inch for a one and one-quarter inch tube.

and the forwardly extending edges of each Number tongue form an angle of approximately 60' and 1 63 no the tongue is approximately of an inch in length for a one and one-quarter inch tube. 5 2 ELLIS G. POWELL. OSCAR G. JOHNSON. ALBERT J. Olson. Number 10 23,227 REFERENCES CITED of 1903 The following references are of record in the 3,026 of 1905 tile of this patent:

4 tmrrxn sum mum's Heme Dete McIntyre June 28, 1927 Clarke July 4, 1m Becker In! 29. 1934 Young Feb. 26, 1935 FOREIGN PATENTS Country w Dete Great Britain Oct. 27. 1003 Great Britain Nov. 23, 1905 Italy May 13, 1932

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