US1018156A - Method of making sheet-metal radiators. - Google Patents

Description

O. S. BEYER. METHOD OF MAKING SHEET METAL RADIATORS.

APPLICATION FILED MAY 28. 1910.

Patented Feb. 20, 1912 3 SHEETSSHEET 1 0. s. BBYER.

METHOD OF MAKING SHEET METAL RADIATORS APPLICATION FILED MAY 28, 1910.

1,018,156. Patented Feb.'20,1912.

3 SHEETSSHEET 2.

iii E O.- S. BEYER.

' METHOD OF MAKING 'SHEET METAL RADIATOBS.

1,018,156. APPLIOATION FILED MAYIZB, 1910." Patented Feb. 20

3 SHEETS-SHEET 3.

Z a- 9 I UNITED STATES PATENT oFFIoE.

OTTO S. BEYER, OF HYDE PARK, MASSACHUSETTS. ASSIGNOR TO B. F. STURTEVANT I COMPANY, OF BOSTON, MASSACHUSETTS,

Av CORPORATION OF MASSACHUSETTS.

METHOD OF MAKING SHEET-METAL RADIATORS.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Application filed May 28, 1910. Serial No. 563,849.

T 0 all whom it may concern:

Be itknown that I, OTTO S. BEYER, a citizen of the United States, residing at Hyde Park, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Methods of Making Sheet-\1etal Radiators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to method of making sheet metal radiators or radiator sections.

The object of the invention is to provide an improved and novel radiator which may be conveniently and economically manufao tured from comparatively thin sheet metal, and which will be durable and not liable to become defective or leaky under long continued use.

To these ends the invention consists in the features hereinafter described and set forth in the claims, the advantages of which will be obvious to those skilled in the art from the following detailed description.

The various features of the invention will be readily understood from an inspection of the accompanying drawings, and the following detailed 'description of the radiator shown therein and of the'method of making the same.

In the drawings Figure 1 is a side view of I a preferred form of radiator made in accordance' with the present invention; Fig. 2'

is a side edge view of the radiator; Fig. 3 is a vertical section on line 33, Fig. 1; Fig. 4 is a bottom view of the radiator Fig. 5 is a sectional view on line 5-5, Fig. 1; Fig. 6 is a view showing one side of the sheet metal plate from which the radiator is formed after it has been bent and shaped preparatory to folding it; Fig. 7 is an edge view of the plate after the folding has been partially completed; Fig. 8 is an edge view after the I folding has been completed to bring the marginal flanges together and before the marginal portions of the plate between the fold lines have been brought together; Fig; 9 is a similar view after the marginal portions of the plate between the fold lines have been closed together; Fig. 10 is an enlarged view showing a part of the central portion of the plate shown in Fig. 6 after it has been partially bent and shaped; Fig. 11 is a seccenter and may be formed; Fig. 15 is a view similar to, i I

Fig. 10, showing a part of the central portion of the plate after the bending and shaping has been completed, preparatory to the folding of the plate; Fig. 16 is a sectional view" on a line corresponding. to 16-16, Fig. 10, showing the plate in position between the dies which rebend the central portion of the plate into the form shown in Fig. 15 before the dies have acted on the plate; Fig. 17 is a sectional view on line 17-17, Fig. 15, showing the plate and rebending dies in section; Fig. 18 is a similar. view on line 18-18, Fig. 15; and Fig. 19 is a similar view on line 19-19, Fig. 15.

In accordance with the present invention the radiator is formed by bending and fold-" ing a single sheet metal plate, and securing together the contacting faces of the two end sections of the plate after it has been folded.

shown inthe drawings the sheet metal plate 1 (Fig. 6)' is bent and shaped by suit- :able dies to form a transverse depression 2 which extends across thev central portion of the plate. This depression is so sha ed that it is provided with two parallel f dld lines 3 which extend transversely across the plate at equal distances from the center of the plate. The transverse depression is provided with one or more ports 4 between the fold lines, there being two of such ports in the specific embodiment of the invention illustrated. The bottom of the transverse depression is so shaped that it-increases in .depth toward the ports in either direction. In the embodiment shown the bottom of the depression is of less depth at its ends and gradually increases in depth until it intersects the port. The bottom of the depression is also substantiall flat at its ends and center, and slopes om the fold lines toward the center. The fold lines therefore are straight and lie in the same plane as the bottom of the transverse de- Y pression at its ends and center. The plate is also bent by suitable dies to form semitubular depressions 5 which extend from the cated that intermediate fiat surfaces 8 and 9 are formed between the depressions extending in lines at right angles'to the transverse depression 2. The surface of the plate slopes from the flat surfaces 8 toward the fold lines, as indicated at 10. The plate is also bent to form transverse semi-tubular depressions 11 connecting the tubular depressions 7 and 5, and dividing the flat surfaces 8 and the upper portion of the flat :surfaces 9, into small rectangular spots.

After the plate has been thus bent and .shaped by the dies in a manner which will be hereinafter more fully explained, the plate is folded along the two fold lines 3, as indicated in Figs. 7 and 8, to bring the marginal flanges 6 and flat surfaces 8 and 9 into contact with each other. When the plates have been thus folded, a hollow plate or radiator section is formed which is completely closed except at the ports 4 and at .the ends of the fold lines. At the ends of the fold lines there will be on each side of the radiator section a triangular opening 12, as indicated in Fig. 8. These openings are closed by forcing together the marginal portions of the plate between the fold lines, as indicated in Fig. 9. Ihe marginal flanges and the contacting spots or surfaces 8 and 9 are then secured together as by electric welding, riveting, or in any suitable manner.

In case the inlet and outlet ports for the radiator are both formed in the transverse depression 2 which becomes the bottom of the completed radiator, it is preferred to form the continuous fiat surfaces 9 about midway of the plate, and to close together the surfaces of the plate at the inner ends of the surfaces 9 after the plate has been folded. After the plate has been folded there will be a small triangular opening similar to the opening 12 at the inner ends of the surfaces 9, and this may be closed in the same manner that the openings '12 are closed. By this construction the steam or other heatlng' fluid is compelled to flow up one side of the contacting surfaces 9 to the depressions 11 at the upper ends of the surfaces 9, and down the other side. By-forming the transverse depression 2 so that its depth increases toward the ports, any water which may collect in the radiator will flow away from the joints and toward the ports.

There will be no collection of moisture, I

therefore, in any of the joints, and no danger of corrosion and rapid wearing and eating away of the metal.

Inbendingand shaping the sheet metal plate to form the central transverse depression with parallel fold lines, as above described, it is preferred to first bend theplate to form a central transverse depression of substantially uniform depth and having a substantially flat bottom, and to then rebend the depressed central portion of the plate to form the fold lines and give it the shape above referred to. The preferred method of bending and shaping the plate is illustrated in Figs. 10 to 18. In accordance with the method here illustrated, the sheet metal plate is first subjected to the action of the ending dies 18 and 14: which form the transverse depression 2 and the semi-tubular depressions 5, 7 and 11. The'transverse depression 2 is formed by a bending rib 15 on the male die 13 constructed to enter a transverse groove 16 in the female die, and to bend the plate over the shoulders 17 at the ends and center of the groove, and over the bending shoulders 18 at points intermediate the ends and center. The female die is provided with ribs 19 and intermediate depressions 20, while the male die is provided with bending ribs 21 registering with the depressions 20. The ribs19'are provided with transverse depressions 22 which register with transverse bending ribs 23 on the male die. The ribs 19 and 21 cooperate in bending the plate to form the semi-tubular depressions 5 and 7, and the bending ribs 23 cooperate with the depressions 22 in forming the transverse tubular depressions 11. The dies are so shaped that the marginal flanges 6 and the flat surfaces 8 and 9 are in the same plane. It is also preferred to so shape the dies that the transverse depression .2 is slightly greater in depth than the depth of the semi-tubular depressions 5 and 7, as indicated by the dotted lines in Figs. 11, 12 and 13. In forming the transverse depression 2 in the manner described, there is practically no stretching and thinning of the metal at the central ortion of the plate where the transverse epression is formed. After the transverse depression 2' has thus been formed the central portion of the plate;

is subjected to the action of rebending dies which rebend the central portion to give the transverse depression the shape already described with reference to Fig. 6, and which is also shown in Fig. 15. During this reshaping of the central depressed portion of the plate the sections of the plate on the op-' posite sides of the central portion are preferably held by clamping plates which are shaped to fit the opposite sides of the plate. The rebending dies are so shaped that they rebend the central depressed'portion of the plate to form the straight transverse fold lines, and to give the bottom of the depression the form already described, without stretching or thinning the metal.- By thus 5 forming the transverse depression, and then rebending it to give it its final shape, the full thickness and strength of the .sheet metal plate are preserved at the bottom of the finished radiator, where thickness and strength are the most desired, and a thinner plate may therefore be utilized in making I the radiator than would otherwise be practicable.

The clamping plates for holding the sheet metal plate during the rebending of the central portion may be conveniently formed by using a plate after it has been bent into the shape indicated in Fig. 10 as a pattern for casting the twoclamping plates 24 and 25, as indicated in Fig. 14, and then removing the central portion of the clamping plates, as indicated in dotted lines in this figure. The rebending dies 26 and 27 are arplates 24 and 25, as indicated in Figs- 16 to 18. In order that the clamping plates may engage and clamp the sheet metal plate before the rebending dies act to rebend the central port-ion of the plate, the'clamping plates 25 are supported upon springs 28. The rebending dies are so shaped that in rebending the central portion of the sheet metal plate they bring the bottom of the depression at its ends and center into the same plane as the bottoms of the semi-tubular depressions 5 and 7, form cylindrical projections 29 for the ports 4, form the straight parallel fold lines 3 which lie in the same plane as the bottoms of the depressions 5 and 7, and shape the metal between the fold lines so that the bottom of the transverse depression gradually increases in depth from the ends and center of the transverse depression toward the ports. In rebending the central depressed portion of the plate the extra metal between the fold lines and the ends of the clamping plates 24 and 25 forms the curved bulges 30 which are the most pronounced at the points where the transverse depression is of the least depth and gradually disappear toward the points where the depth of the transverse depression is the greatest. The formation of these bul es is merely incidental to providing s cient able the rebending at the point where the depression 2 is the'deepest without stretching and thinning the metal at this point. After the plate has been acted upon by the rebending dies, the port projections 29 are pierced, and themetal bent outward to form the nipples 31. Sleeves ormunions'may be brazed or otherwise secured to these nipples, so that the supply and exhaust pipes may be conveniently connected to the radiator.

ranged between the sections of the clamping metal in the transverse depression 2 to en-' While a construction has been shown and described in which both the supply and exhaust ports are forme in the bottom of the radiator, and the radiator is divided into two sections by contacting surfaces 9 which extend from the bottom nearly to the'top of the radiator, it will be understood that this construction is not essential, and that if found desirable one of the ports may be otherwise located, and the dividing contacting surfaces omitted. It will also be understoodthat the specific construction of the radiator, and the specific manner in which the bending is done, is not material except so far as it is set forth in the claims,

and may be varied without departing from the broader features of the invention.

Having explained the nature and object of the invention, and specifically described one embodiment thereof, what Iclaim is 1. The method of making sheet metal radiators consisting in bending a sheet metal plate to form a central transverse depression provided with parallel fold lines,

with one or more ports between the fold lines, and with its bottom between the fold lines increasing in depth toward the ports in either direction, and to form marginal flanges and marginal semi-tubular depres sions extending from the ends of the transverse depression, and semi-tubular depressions extending from the transverse depression to the parallel marginal depressions, folding'the plate on the fold. lines to bring the marginal flanges together, closing together the marginal portions of the plate between the fold lines, and securing thecontact-ing surfaces of the stantially as described.

2. The method of making sheet metal radiators consisting in bending a sheet metal plate; to form a central transverse flat-bottom depression of substantially uniform depth, marginal fiangesjand marginal semi-tubular depressions extending from plate together, sub- -the ends of the transverse depression and semi-tubular depressions extending from the transverse depression to the parallel marginal depressions, rebending the. depressed central portion of the plate to form transverse parallel fold lines, and one or more ports between the fold lines, and to graduallyincrease the depth of the transverse depressiongtoward' the port or ports in either direction, folding the plate on the fold lines to bring themarginal flanges together, closing together the marginal portions of the plate between the fold lines, and securing the cont-acting surfaces of the plate together, substantially as described.

3. The method of making sheet metal radiators consisting in bending a sheet metal plate to form a transverse depression provided with arallel fold lines with one or more ,ports etween the fold linesand with" its. bottom between the fold lines increasing in depth toward the port or ports in either direct-ion, and to term marginal flanges and semi-tubular depressions extending at substantially right. angles from the transverse depression, and to form transverse depressions between said semitubular depressions, folding the plate on the fold lines to bring the marginal flanges together, closing together the marginal portions of the plate between the fold lines, and securing the contacting surfaces of the plate together, substantially as described.

4. The method of making sheet metal radiators consisting in bending a sheet metal plate to form a Central transverse depression of substantially uniform depth and to form marginal flanges and semitubular depressions extending at substantially right angles from the-transverse depression and transverse depressions connecting said semi-tubular depressions, rebending the depressed central portion of the plate to form transverse parallel told lines and one or more ports between the fold lines and to gradually increase the depth of the 1 transverse depression toward the port or ports in either direction, folding the plate on the told lines to bring the marginal intense flanges together, closing together the marginal portions of the plate between the fold lines, and securing the contacting surfaces of the plate together, substantially as described.

5. The method of making sheet metal radiators consisting in bending a sheet metal plate to form a transverse depression provided with parallel fold lines with one or more ports between the fold lines and with its bottom between the fold lines increasing in depth toward the port or ports in either direction and to form marginal flanges and semi-tubular depressions intersecting the transverse depression and separated by flat surfaces in the plane of the marginal flanges and to form transverse de' pressions connecting the semi-tubular depressions, folding the plate on the fold lines to bring the marginal flanges and flat surfaces together, closing together the marginal portions of the plate between the fold lines, and securing the contacting surfaces of the plate together, substantially as de- 1 scribed.

UTTQ Sn BEYER. Witnesses:

E. B PELLMAN, lf. lHLnRLAN.

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