US2699923A - Radiator - Google Patents

Description

Jan. 18, 1955 A. c. WALWORTH RADIATOR Filed July 14, 1953 United States Patent O This invention relates to radiators of the' fin type in which'the fins can beapplied topipes already installed so as to increase the radiation wlthout requlrmg removal 9 of the piping orsubstitution of equipment.

In'accordance'with this invention the fins are secured in position by wedge keys arranged transverse to the length of the pipe as shown in the Waldron Patent No. 2,571,505, but-the-fins are'individually applied 111 accordance with this invention, -and-the*portions ofthe fins with which the wedges or keys engage areso designed that they may be made by-a simpler and less expensive operation than in the 'Waldron'constr-uction.

-Where space 'permits ,-also, meansjm'ay be provided, in accordance with this --invention,--to-inerease the area of contact betweenthepipe and-fin, thus tolncrease the efiiciency of heat conduction from one to-the other.

For a more complete understanding of this invention, reference may be had to the accompanyingdrawings in which Figurel is a perspective -view of aradiator fin and its attaching wedge or key.

Figure 2 is a' fragme'ntaryelevation of a'pair of pipes arranged in bank and showing-fins of the type shown in Figure 1 secured thereto.

Figure 3-:is-a. detail" sectional view'-on-line'3-3 of Figure 2.

Figure 4 is 'an' "explodedperspective'view showing a modification; parts being shownby dotted lines in assembled relation.

Figure 5 is a fragmentary perspective view showing a further modification.

Referring-first to Figures 1, 2,==and 3'; the radiator fin 1, which may be stamped from sheet metal, is formed with a slot 2 extending inwardly from one face, the base of this slot being rounded as at 3 so that it may engage about substantially 180 of a pipe 4 to which the fin may be secured. As is common in such fins, it may be provided with a recessed annular face portion 5 which acts to stiffen it and tends to hold it extending laterally at substantially right angles to the pipe. This fin 1 is provided with a pair of lips 6, one on each side of the notch, formed by partially cutting the material of the fin along generally parallel lines generally parallel to the sides of the slot and offsetting it laterally between its sides, spacing it away from the adjacent face of the fin by an amount sufficient to receive between them a wedge member or key 7 which is inserted between the lips 6 and the adjacent face of the fin, as shown best in Figures 2 and 3. As shown in Figure 1 the inner ends of the lips are severed from the fin so that the lips face inwardly. This wedge or key 7 may bear against the pipe 4, and hold the fin in position thereon and forced thereagainst for most effective heat conduction between them. These lips may be formed readily by a simple stamping operation and may be formed at the same time as the rib 5 and when the fin is stamped out, if desired. This provides a simple manner of forming a fin which can be attached to a pipe already in position without requiring the dismantling of the pipe and without requiring the substitution of apparatus particularly designed for radiating heat when pipes 4 such as shown in Figure 2 are already in position.

Such pipes when employed for heating are commonly arranged as shown in Figure 2, adjacent pipes being connected by a U fitting 10 into which ends of the pipes are secured. Commonly such pipes are arranged spaced 2,699,923 Patented Jan. 18, 1955 apart three= inches on-ce'nters, which allows only a small amount of room between-them, butthis is sufficient for the insertion of=the-wedgemembers or keys 7 as shown in Figures 2- and -3. 0f 'course'theremay be more --than two pipes in one installation. V

Where there is-more room for the placement of the fins, a preferred construction'illustrated in Figure 4-rnay be employed, this' const'ruction-having theadvantage of increased efificiency ofradiation, Referring to thisfigure,

the fin 1a is provided with-the lips 6a whicharespaced outwardly from the pipe over which the slotted portion Zamay beplaced. A- filler plate 15 shown in Figure'4 the sides of :the 'slot' 2a and pressed from the material thereof, this lip being on-the side'of the plate 15 corresponding tothe lips 60f the fin 1a and severed at-itsouter 'endso as to face the outer edge of the plate 15in the opposite direction -to the'lips 6a. This plate may be cut from the material of the fin itself. Preferably, also, the sides of the slot 2a flare-slightly, so that forcing the plate portion 15 inwardly presses the sides of the plate against the-sides of'the slot- 2a and also presses the inner concaved edge 17, 'aswell as the base of the slot 2a, tightly against opposite sides of the pipe. Theinsertion of a wedge-member 20 between the lips 6a and the adjacent face of the fin member 1a and between the lip 18 and the corresponding faceof the plate member 15 forces the plate 15 and the fin 1a against the pipe from opposite sides. The edge 17" engages 'the pipe over substantially the remaining of its circumference tothat engaged by the' base of the slot 20. 'Thus the fin 1a and the plate member 15 together engage substantially about the entire circunifrenceof the pipe. Itwill'be noted; however, that the wedge member 30 is not in contact withthe pipe'as it is in thestructure shOWn in Figures 1, 2, and 3.

Where the ma'terial'of the fin'or filler plate piece or both permit, a further and desirable modification shown in Figure 5 may be employed in-which both ends ofthe lips 6bor '18 b'are leftattachedthe materialof the lip or lips-6b on 18b being stretchedsuificiently to be offset from the plane of the piece lb or 15b from which it has been partly severed. In any case where the filler plate piece is employed, its lip is positioned between and generally parallel to the lips of the fin.

From the foregoing description of certain embodiments of this invention it should be clear that various changes and modifications may be made without departing from the spirit or scope of this invention.

I claim:

1. A radiator fin notched inwardly from one edge to take over and engage a pipe throughout substantially 180 of the pipe circumference, said fin having parts partly cut and bent from the general plane thereof to form a pair of lips, one on each side of said notch and generally. parallel thereto in position for a key to be engaged between said lips and the adjacent face of said fin and extend across said notch and hold said fin onto a pipe extending through said notch.

2. A radiator fin notched inwardly from one edge to take over and engage a pipe throughout substantially 180 of the pipe circumference, said fin having parts partly cut and bent from the general plane thereof to form lips facing away from said notched edge in position for a key to engage back of said lips and extend across said notch and hold said fin onto a pipe extending through said notch.

3. The combination with a pipe, of a radiator fin notched inwardly from one edge, the width of said notch being substantially equal to the diameter of said pipe and having a rounded inner end to engage over said pipe throughout substantially 180 said fin having parts on opposite sides of said notch partly cut and offset from the general plane of said fin to form lips facing away from sa1d notched edge, and a wedge engaging back of said lips and against the adjacent face of said fin and extending across said notch in position to retain said fin assembled on said pipe.

4. A radiator fin notched inwardly from one edge to take over and engage a pipe throughout substantially 180, a filler plate piece in said notch having a concave inner edge to engage the pipe opposite to the engagement of said fin therewith, said fin having parts partly cut and bent from the general plane thereof to form a pair of lips one on each side of said notch and generally parallel thereto, and said filler plate piece having a part partly out therefrom and bent from the general plane thereof to form a lip generally parallel to and between said fin lips, and a wedge member extending across said fin and plate piece and between said lips and the adjacent faces of said fin and plate piece to hold said fin and plate piece assembled on the pipe.

5. A radiator fin notched inwardly from one edge to take over and engage a pipe throughout substantially 180", a filler plate piece for said notch having a concave inner edge to engage the pipe opposite to the engagement of said fin therewith, said fin having parts partly cut from the plane thereof at each side of said notch to form lips spaced from one face of said fin and facing inwardly from said notched edge, said filler plate having a part partly cut therefrom and offset from the plane thereof to form a lip spaced from one face and facing outwardly, and a wedge member between said lips and the adjacent faces of said fin and plate holding said fin and plate assembled.

6. A radiator fin notched inwardly from one edge to take over and engage a pipe throughout sustantially 180, a filler plate piece in said notch having a concave inner edge to engage the pipe opposite to the engagement of said fin therewith, said fin having parts partly cut and bent from the general plane thereof to form a pair of lips one on each side of said notch and generally parallel thereto, and said filler plate piece having a part partly cut therefrom and bent from the general plane thereof to form a lip generally parallel to and between said fin lips, and a wedge member extending across said fin and plate piece and between said lips and the adjacent faces of said fin and plate piece to hold said fin and plate piece assembled on the pipe, the sides of said notch and filler plate piece flaring outwardly.

7. A radiator fin notched inwardly from one edge to take over and engage a pipe throughout substantially 180, a filler plate piece for said notch having a concave inner edge to engage the pipe opposite to the engagement of said fin therewith, said fin having parts partly cut from the plane thereof at each side of said notch to form lips spaced from one face of said fin and facing inwardly from said notched edge, said filler plate having a part partly cut therefrom and offset from the plane thereof to form a lip spaced from one face and facing outwardly, and a wedge member between said lips and the adjacent faces of said fin and plate holding said fin and plate assembled, said fin and plate having mating side edges flaring outwardly toward said notched fin edge.

8. In combination with a pipe, of a radiator fin notched inwardly from one edge, the width of said notch being substantially equal to the diameter of said pipe and the base of said notch being concaved to engage said pipe over an arc of substantially a filler plate piece for said notch having a concaved inner end engaging with said pipe for substantially the remaining 180, said fin having parts partly cut from and offset from one face thereof on opposite sides of said notch to form tongues facing the base of said notch, and said filler plate piece having a part partly cut and offset from the corresponding face of said filler plate and forming a tongue facing oppositely to the tongues of said fin, and a wedge member engaging between said tongues and the adjacent faces of said fin and filler plate and wedging both against opposite sides of said pipe.

9. In combination with a pipe, of a radiator fin notched inwardly from one edge, the width of said notch being substantially equal to the diameter of said pipe and the base of said notch being concaved to engage said pipe over an arc of substantially 180, a filler plate piece for said notch having a concaved inner end engaging with said pipe for substantially the remaining 180, said fin having parts partly cut from and offset from one face thereof on opposite sides of said notch to form tongues facing the base of said notch, and said filler plate piece having a part partly cut and offset from the corresponding face of said filler plate and forming a tongue facing oppositely to the tongues of said fin, and a wedge member engaging between said tongues and the adjacent faces of said fin and filler plate and wedging both against opposite sides of said pipe, the sides of said notch and filler plate flaring toward said notched edge.

References Cited in the file of this patent UNITED STATES PATENTS 399,493 Campbell Mar. 12, 1889 440,671 Weisel Nov. 18, 1890 1,885,536 Murray Nov. 1, 1932 2,557,760 Powell et al. June 19, 1951 2,571,505 Waldron Oct. 16, 1951

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