US1806186A - Radiator - Google Patents

Description

y 19, 31- R. N. TRANE 1,306,186

RADIATOR Original Filed April 23, 1926 J72 2 678 2"07" JEeu/awzW @7312/26.

Patented May 19, 1931 FFIC -. or LA caossn, wrsconsm i, IATOR Original application filed April 28, 1928, Serial No. 104,196. Divided and this application filed May 81,

1928. Serial No. 282,002. I

This invention relates to radiator units and to devices for forming said units, and is a division of my co-pending application, Serial No. 104,196 filed April 23, 1926.

My invention relates to radiators, and more especially to radiators used in steam, vacuum or hot water heating systems and employing a multiplicity of fins of thin sheet metal in heat-conducting relation to the heat tube portion of the radiator, which contains the heating medium. In heating a room, such a radia ator, as compared with the usual cast iron radiator, operates more upon the principle of conduction of air than upon the principle of radiation.

One of the chief objects of my invention is to provide an improved heat-conducting contact between the fins and the heat tube whereby very thin sheet metal may be used for the fins and the heat tube may be of relatively ing capacity, has a volume, floor area, weight,

height and cost considerably less than the usual cast iron radiator construction. As compared with the usual design of cast iron radiators, my radiator unit described inthis specification, for example, has but 60% of the manufacturing cost, 8% or 10% of the weight, and less floor space.

A further feature of my invention is that it enables the use of fins made from very thin sheet metal,- but which are so designed that they are sufficiently strong and have a maximum area available for heat radiation.-

A further object of my invention is to probeeln found to give very satisfactory result. an

vide an improved means for securing the fins tothe tube.

Other objects will be apparent as the detail description of my invention proceeds.

In the accompanying drawings which rep resent preferred embodiments of my invention and in which like parts are indicated b similar reference characters (the same re erence characters being used as were used in the parent application referred to above),

Figure 1 is a perspective View of a form of my radiator unit; v

Figure 2 is a vertical transverse section through the unit which may be considered as taken along the line 22 of Figure 1;

Figure 3 is a fragmentary section along a heat tube with spacing rings having cammed or tapered inner peripheries for effecting heat conducting contact between the fin flanges and the tube.

In Figures 1 and 2 I have shown a form of my radiator unit employing a pair of spaced tubes T conveniently formed by bending a single-tube into a U-shape. A multi plicityof closely spaced fins F formed from very thin sheet metal are fixed-upon the spaced tubes making contact therewith by ald of flanges f struck out from the sheet stock of the fins about the margins of spaced openings through whichthe respective tubes pass. I

In order to keep the radiator as light as possible, I prefer to use very thin metal for Sheet copper .007 inch thick has a minimum weight. Obviously the flanges f struck from such sheets will not .have enough strength to form and maintain a good heat-conducting contact with the outer surface of a tube'T; and also the flanges are neither strong enough nor thick enough to serve as spacers between adJacent fins without danger of the flanges overlapping" or being crimped. To overcome thesedifii-' culties, I provide spacing rings or ferrules ll which are dis osed as sleeves about the outer peri heries o the flanges f and with the faces of t e rin s abuttin the opposed faces of adi'acent ns F. These spacing rings not on y serve as relatively unyielding sleeves between which and the tubes the flanges 7, may be tightly and permanently compressed to preserve a firm heat conducting contact over a large area between the fins and the tubes, 10 but also supplement the heat conduction by reason of the contact between the faces of the rings and the flanges of the fins thereby serving much as hubs to augment the crosssectional areaof heat conduction where the heat conduction must necessarily be the most concentrated in its'path from the tube to the radiatin surfaces of the fins.-

In .or er to avoid any complications from varying coefficients of expansion, I make the tubes T, the fins F and the spacing rin s R all of copper and, at least in those metho s of assembly wherein I ex and the tube in order to press the tube and n tightly-against each other and against the spacmg ring; I prefer to maintain a proportion between the thicknesses of the three elements somewhat as follows: The fins are formed from sheet stock .007 inch thick, the shell of the tube '1 is about .020 inch thick and the spacing rings Various methods of effecting heat-conducting contact between the fins and the tube may be employedas described in the parent appliembodiment of my radiator structure and the means for securing the fins on the tube,-

aperture through'which said tube isinserted,

a flan e on said fin adapted to bear against the tu e, and a channel shaped reinforcing 'ring comprising an annular cam portlon whereby said ring pinches said flange against said tube. i

2. In combination a tube, a plurality of are stamped from stock about .030 inch thick.

While I have described in detail preferred rin s "whereby said ring pinchessaid flange agamst the tube.

3. In combination a tube, a heat radiatin UBEN N. TRANE.

heat radiating fins provided with apertures O5 to space said fins and to reinforce said flanges,

a continuous annular cam portion (in said

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