USRE20321E

USRE20321E - Method of making heat radiators

Info

Publication number: USRE20321E
Authority: US
Publication date: 1937-04-06

Description

April 6, 1937. J. KARMAZIN 20,321 1 METHOD OF MAKING HEAT RADIATOHS I v Original Filed May 31, 1929 2 Sheets-Sheet 1 i .fi m i n April 1937- J. KARMAZIN Re. 20,321

' METHOD OF MAKING HEAT RADIAfIO RS Original Filed May 31, '1929 2 Sheets-Sheet 2 Reissued 6, 1937 UNITED STATES PATENT OFFICE Karmazin Engineering Company, Detroit, Mich., a corporation of Michigan Original No. 1,997,583, dated April 9, i935, Serial No. 367,308, May 31, 1929. Application for reissue August 24, 1938, Serial No. 97,660

Claims.

This invention relates to improvements in heat radiators; and more especially toheat radiators for lowering the temperature of the cooling liquid in the engines of automobiles and other motor ve-' 5 hicles.

an object of the invention is to provide a radiator comprising relatively few parts designed to afford a very efficient cooling action, and be quite simple in construction, so that it can be easily and readily made and at low cost.

Another object of the invention is to provide an improved method by which the parts of the radiator or tube can be easily, quickly and inexpensively assembled and permanently attached 1:; to one another in a manner that will permit the circulation of the cooling liquid of the engine therethrough without risk of leakage.

The radiator of this invention as shown and temperature thereof is lowered by the air coming in contact with the outside of the tubes and integral fins and carrying away heat. Y

' Heretofore, it has been more or less difficult to make the joints between the telescoping projections leakproof; and, though soldering has been employed. the task of getting the solder into place and making it seal the joints between the telescoping projections has been somewhat unsatisfactory; being either expensive or requiring a relatively great amount of time for the performance of the soldering operation. My invention aims to eliminate previous objections on this score by a method which enables the joints between the telescoping projections to be soldered 5 together in a most effective manner, to receive the solder at the proper points and toco'r'nplete the whole operation in a relatively short period and with the use of a small amount of solder. This end can be gained, for example, by putting a thin strip of solder into each tube made up of a row of telescoping projections, after the projections have, of course, been suitably cleaned with acid or any other suitable substance, and then placing the core in an oven and supporting the assembled radiator body (or. 113-1118) I in such position as will enable the solder as it the invention can be practiced, but I may obviously resort to' changes in detail without departing from the principle or exceeding the scope of the invention.

0n the drawings:

- Fig. 1 is a view partly in section showing in side elevation an element consisting of a plate or strip of metal with projections formed therefrom, to

be employed in building a radiator according to this invention;

Fig. 2 is a top plan thereof Fig. 3 is a section taken transversely through Fig. 2 on the line 3-4 thereof;

Fig. '4 shows how the elements or units are nested to form the body of the radiator;

Fig. 5 is a view similar to Fig. 4 showing the first step in the process of soldering the joints between the tubular projections;

Fig. 6 shows in side view and Fig. 7 in end view a strip of solder employed in the soldering process;

Fig. 8 shows the manner in which the solder or I like jointing material takes effect on the interior of each set of tubular projections forming a tube;

Fig. 9 shows how the solder takes effect on the outside thereof; and 1 Fig. 10 shows how the solder is caused to flow into contact-with all points in the circumference of the tubes at the joints between the telescoping projections.

The numeral i indicatesa strip or plate of metal which is, stamped to provide tubular projections 2 which will taper somewhat toward their outer ends. The strip I may also have openings 3', the edges of which are bent downward, as shown at 4. The projections 2 are arranged in rows along the length of the strip, the rows, of course, being staggered so that the projections 2 of each row are located between the intervening spaces of each adjacent row, and the openings 3 i may be likewise arranged and are formed in the spaces between the projections 2 of the successive rows so that the openings 3 and projections 2 alternate transversely of the strip I at any given point. Of course as many rows of projections 2 1 2 'so,sa1

may beformed is desired. The strip in Fig. 1

shows from end to 'end two rows ofprojections andtwo rows of openings. the projections I and openings I being staggered. as above set forth.

5 'lheedgesloftheopeningsl extendlengthwise of the strip.

11 desired-the openings 3 and down-turned pro lines which unite them to the projections 2 ex cept at diametrically opposite points, and forced 15 outward to form semi-circular vanes or wings I;

the portions of the rims which remain attachedto the projections 2 being indicated at I. These portions project at diametrically opposite points in the outer end of each projection and serve to some extent to obstruct the free flow of water therethrough to prevent the water from passing too'rapidly, as well as to connect the vanes I to the projections 2.

2, Fig. 4, they form the body or core of the radiator: the tubes for the cooling liquid being made up of the telescopic projections, which will be spaced apart far enough to allow free circulation of air among the tubes and through the core. Usually the tubes will be vertical and the fins I horizontal when the radiator is in use. The vanes [with the parts I which join these vanes to the projections will deflect the water somewhat from the middle of the tubes towards the circumference. as well as slightly retard the water and prevent it from flowing through the tubes too fast. Some of the heat of the water is also taken up by the vanes I and conducted directly to the projections I and plates I. and the water in the tubes is efllciently cooled by the action of the air which flows against the tubes and along the surface of the plates I and strikes the projections 4. These projections l serve to retard the air somewhat to prevent it 5 flowing too rapidly through the radiator and may also,,to some extent, deflect the air and cause it topass through the plates. The air thus extracts the maximum of heat through the sides of the projections 2 and plates I and the cooling actionof the radiator is very efllcient.

many units as are required to make the liquid tubes of the necessary length, is put in horizontal position as indicated in Figs. 5 and 10. A strip of solder I is passed through each row of projections i. This strip of solder should be thin so as to use no more material than is necessary, and it is preferably made channel-shaped as shown in Fig. I to give it stifl'ness so that it can be handled and will not readily bend. All of the projections 2 are previously cleaned with acid or any other suitable agent, preferably before the projections I are telescoped together. The radiator is then put into an oven and heated to melt the strips of solder I. As soon as the solder melts, it of course collects at the lowest points 9 in the tubes made'up by the projections 2; and as the tubes are conical, the solder in each projection will naturally run down towards the telescoped end of the projection received therein. This is due to the fact that, because of the conical shape ofeach projection I. the

bottom of each projection will slope downward towards the telescoped end of the adjacent projection, when the radiator is in horiaontal posi- When the elements or units are assembled as in tion. forming in eflect a depression as shown at l in Fig. 5. a

a 'As the solder 8 is melted. the radiator-in the oven is rotated about an axis'as indicated in Fig. 10. The solder now flows round on the inside of eachprojection adjacent the depression I which telescopes therein. It penetrates in between the two projections probably by capillary attraction and appears on the outside of the tubes. as well astheinside, forming a coating which closes the joint between the adjacent projections perfectly using a minimum amount of solder.

outside thereof. The inside coating covers the ends of. the telescoped projection and the adjacent inside surface of the projection which re-' ceives it; while the outside coating Il flils the corner between the fins I and the projections passing into the has, and a small portion of the surface oi the projection which passes into each oi the fins I. The joint between each pair of projections is thus fully sealed at two points and any possibility of leakage is. entirely obviated. The

radiator is thus not only'simple in construction and easy and inexpensive to manufacture and flnish, but it is also very effective in action, and the soldering of the joints is easily and expeditiously accomplished. The soldering takes eifect v at each joint so completely that all leakage and subsequent deterioration and opening of the joints is rendered impossible. I

It will be seen that any onetube of applicant's structure comprises, in eifect a series of aligned loopswhich form transversely disposed ridges for distributing the bonding material.

What I claim as my invention is:

l. The method of forming a radiator of thefln-and-tube type having a plurality of tubes. each formed of telescoping projections with substantially cylindrical joints between eachpalr of projections, which consists in inserting a strip of solder into each tube of telescoping projections. disposing the radiator so that each of said tubes is in horizontal position, and then subjecting the radiator to heat to melt the solder, and changing the position of the radiator through an angle of 360 'while maintaining the tubes horizontal to cause the solder to flow into each joint through-.

out the whole length of the joint.

2. The method of forming a radiator of the fln-and-tube type having tapering telescoping projections constituting continuous tubes and making said tubes liquid tight which consists in putting the radiator withthe tubes in horizontal position, placing a strip of jointing material in each'tube, subjecting the radiator to heat to melt the material to allow said material to flow down to the lowest point of each projection against the end of theprojection telescoped therein and to flow between said projections by capillary attraction while keeping the tubes horizontal. whereby said jointing material adheres to the inner face of the one. projection and the ad.-

jacent outer face of the projection telescoped This coating is indicated at It in Fig. 8 on the inside of theprojections, and at II in Figs. 8 and 9,on the tubes and heating thetubes to cause the solder to flowthrough the telescoped portions of the projections from the inside to the outside'ot the tubes while retaining the radiator in horizontal posltionand slowly rotating the same through one revolution, said flow of solder substantially X withdrawing all solder from the tube walls between joints.

4. The method of manufacturing tubing which 10 comprises aligning loops of metal to form a tube having transversely disposed joints with internal transversely disposed ridl fl. inserting bonding material in strip form through substantially all of the loops to be joined in said tube, and passing said tube through a heating zone whereby said bondingmaterial melts and gathers adjacent said ridges and said Joints.

5. The method oi manufacturing tubing which comprises aligning loops of metallic material so as to form a tube having internal ridges, inserting a' wire of bonding material through substantially all of the loops to be joined in saidtube l0 and passing said tubethrough a heating zone. JOHN- KARMAZIN.