No. 858,258. PATENTED JUNE 25, 1907. F. BRISGOE & J. M. ANGUISH. PROCESS OF MANUFACTURING RADIATORS.

APPLICATION FILED SEPT. 28, 1906.

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C 4 ngllz? N0. 858,258. PATENTED JUNE 25, 1907. F. BRISCOE & J. M. ANGUISH.

PROCESS OF MANUFACTURING RADIATORS. APPLICATION FILED snrr. 2a, 1906.

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UNITED STATES FRANK BRISCOE AND JAMES" M. C'ANGUISH,

ASSIGNORS TO BRISCOE A CORPORATION OF PATENT OFFICE.

or DETROIT, MICHIGAN,

MFG. COMPANY, OF DETROIT, MICHIGAN, MICHIGAN.

PROCESS OF MANUFACTURING HIADIATO'RS.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed September 28, 1906. serial No- 836,627.

To in whom it may concern: Be it known that we, FRANK BmscoE and JAMES M. ANGUIsH, citizens of the Uniteddiators used for cooling liquid-cooled explosive motors in automobiles and similar vehi cles. Radiators of this class consist in general of tubes through which the water flows fins or gills pro jecting from the tubes for dissipating the heat therefrom. The efiiciency of the fin is greatl increased by making a continuous metal ic connection between it and the tube, which connection is done by soldering. In order to provide an ample connection a flange is thrown up aroundthe aperture-through which the tube passes, and it is desirable to possible of, the surface of this flange soldered to the tube. This-soldering has usually been accomplished inone of three different ways, to-wit: First, solderin by hand; second, dippin the assembled tube and fins into molten sol er; or third, by

first tinning the tube or fin, or both, then assemblin and then heating the assembled parts W ich causes afusion of the tin sufficient'to produce contact of arts. The objection to the first mentione method is that it requires conslderable labor and is, hence,

too-expensive. The second method requires angexcessive amount of the molten. solder whichinecessarily adds bot to the amount I e third method produces poor contact.

Broadly speaking, the object of our invention i'sto rovide means whereby good contact may e obtainedwith a minimum expenditure of labor andminimum quantity of solder or other fusing mater al. The specific method will be hereinafter described.

Generally speaking, we accomplish our ob-' ject by perforatin the fins at one or more points, such that w en the fins are assembled upon thetubes these small apertures willlregi'ster with'each other, that 1s,'form a line or row of apertures at, or near the side of the tube when viewed in the direction of the 14 represents tubes t ;howeveris a mere matte lengthof the tube. Into these registering small apertures is threaded a wire of solder or similar fusible material and the whole structure is then heated sufliciently to cause the fusing of the solder, which flows into the joints between thefin-flanges and the exterior'surface of the water tube, thus forming a metallic bond or connection between the fin and the tube/ The process will be referring to the drawings in which Figure l is a erspective view of a portion of a radiator s owlng the fins in position uponthe tubes before the solder has beeninserted. Fig. 2 is similar to Fig. 1 except better understood by that the fusible wire of solder or other similar material is shown in position within the assembled parts. Fig. 3 is a fragmentary perspective View showing the rear face of the fin with the contact flange thereof. In this form the solder aperture is clear cut, that is, cut away. so that there is no borderin flange around the said solder aperture. v.ig. 4 is similar to Fig. 3 but illustrates a modification in that a'flange is present around the solder aperture. Fig. 5 is a sectional view taken on line 55, Fig. 4. Figs. 6, 7 and 8 are sectional views, taken" on line 6-6, Fig- 9. Fig.

6 lllustrates respectively the tube and fin, as-

sembled but rior to the insertion of the solder wirei Fig. 7 shows the solder wire in position ready for fusing, and Fig. 8 shows the parts after fusion. Fig. 9 is a plan view of a portion of the radiator showing, fusionanges in position upon the water tube. Figs. 10, 11 and 12 are face views of various shapes of fins.

Similar numerals refer to similar parts throughout the several views.

Referring first to the form of device shown in Figs. 1 to 3'inclusive, and v6 to 9 inclusive,

ough which the-water or other-liquid to be fl0ws.' For convenience of description they will be referred to as. Water .tubes. In the form illustrated the width is considerably greaterthanthe height and-they have parallel top and bottom and. rOundgedendsu This,

invention applieselel%ually. cross-sectional ice guratreni; of the fin,.-which?-w ll forconvenience be recooled or condensed desi n, the

to-tubes of-any On; one face ferred to as back. or rear face, arethrown up water tubes as.closely as possible.

flanges 16 which are designed to touch the These flanges are integral with the fins and are formed by stamping in the manner well knownin the art.

At one or more points in the fins at or near the opening for the tube are formed the solder-wire apertures 17. These apertures are located at the same relative point in each one of the fins with the result that when the fins are strung upon the tubes these aper tures register, that is, are in line with each other when viewed in the direction of the length of the tube. These apertures 17 may be clear cut at the edges as shown in Fig. 3, that is, with no flanges bordering said solder apertures, or they may have such bordering flanges as illustrated in Figs. 4 and 5. There are as many of these apertures 17 in each fin at each tube as are required for thefurnishing of sufficient solder, and considering the dis-' tance which the solder will flow, but for the sake of example, it may be stated that we have found by experiment that in a radiator wherein the tubes are approximately of the cross-sectional dimensions of 1/4 x 1" a single solder aperture on each side of the tube is suflicient. This, however, may be varied, depending upon the size of the solder wire employed, its fusibility and the space intervening between the tube and the flange 16.

After the tube and fins have beenassembled in the manner above described with the apertures 17 re istering with each other, a wire or bar 19 o solder or other similar fusible material is threaded through the series of apertures along the tube. When the parts are all thus assembled the solder is heated to melting point by any one of three methods to-wit: First, the assembled parts may be subjected to a flame or other external source of heat second, a hot mandrel may be inserted into the tubes. Third, the assembled tubes, fins and wires may beplaced within a furnace. It will be understood that previous to the assembling of the tubes and fins they have been prepared by a process commonly known as pickling for receiving and becoming fused with thesolder. As a result of any one of the three above mentioned heating processes the soldering material is sweated uniformly between the flange and the tube and forms an excellent metallic contact or bond between them. The melted solder readily flows into the space between the flanges 16 and the tubes 14 so that when the'parts are subsequently cooled the tubes and fins are to all intents and purposes integralwith each other. It has been found by experiment that the solder flows almost entirely to the spaces between the aforesaid tubes and flanges where it performs its proper function instead of being wasted upon the surface of the tubes at points remote from the fins and flanges thereof.

The preferred method of heating the parts is by placing them in a furnace and it is obvious that our process is expeditious and economlcal of labor, as well as economical of material, and efficacious. The resulting product has minimum weight because not burdened with excessive and useless solder and the tubes and fins being thus free from useless solder, have maximum radiating power.

The result of the operation is practically the same whether the apertures 17 are clear cut as shown inFig. 3 or flange-bordered as shown in Fig. 4.

It is probably unnecessary to state that the shape of the fins themselves is quite immaterial so far as the spirit of our invention is concerned, and the flanges may with equal results be a parallelogram, as shown in Fig. 10, square, as shown in Fig. 11, or round as shown in Fig. 12. In Fig. 12 the fin is shown to have a single solder aperture while in the other figures there are shown to be two of these apertures on opposite sides of the tube. In Figs. 10, 11 and 12 the tube receiving apertures are shown to be round for receiving cylindrical tubes, the shape of the tube being also immaterial in so far as the spirit of our invention is concerned.

What we claim as new and desire to secure by Letters Patent, is:

1. The process of manufacturing radiators and similar cooling devices comprising tubes and fins thereon, said process consisting in perforating the fins at the tubes, threading a filament of solder through the perforations in said fins, and subjecting the solder filament to melting heat while said filament is in place.

2. The process of manufacturing radiators and similar cooling devices comprising tubes and flanged fins fitting over them, said process consisting in perforating the fins and flanges at the tube apertures, assembling the fins on the tubes, threading a filament of solder through the perforations in said fins and subjecting the whole structure to a temperature sufficient to melt the solder.

3. The process of manufacturing radiators and similar cooling devices comprising tubes and flanged fins fitting over them, said process consisting of perforating the fins and IIO flanges at the tube apertures, stringing the FRANKIBRISCOE. JAMES M. Aneui n.

Witnesses.

PAUL R. McKENNEY, JAMES A. HOLIHAN.