US1650168A - Wall construction for refrigerators - Google Patents

Description

D. 1. WALKER WALL CONSTRUCTION FOR REPRIGERATORS Filed May '7, 1926 INVENTOR .DAvm ISRA El. WALKER 71% 6.!

ATTORMFYS Patented Nov. 22, 1927-.

UNITED. STATES,

nAvIn ISRAEL WALK-ER, or V NCOUVER, BRITISH COLUMBIA, CANADA.

WALL CONSTRUCTION FOR REFRIGEEJR ACIORS.

Application filed May-7, 1926. Serial No. 107,445.

This invention relates to the construction of the containing walls and ce1l1ng of a refrigerator chamber wherebv the same are rendered non-conductive to heat, with the resultant economy in the-use of the cooling agent or refrigerating means.

The device comprises a means taining a still air space within the walls and for sealing said, air space against the pas 1a sage of air by percolation or otherwise.

While it is generally recognized that a. still air space is one of the most satisfactory non-conductors of heat and the same has been embodied in refrigerator walls, is sufficientcare is not taken to guard against air percolation inward from without, or outward from within, and as a consequence the full advantages of the air space are not obtained. In theconstruction set forth in this application the walls are of heat non-conducting material, such as dry Wood, strong paper and the like, but as such are to a greater or less extent permeable, I enclose them between linings of sheet metal, one on each side of the air space, taking care to ensure that the corners of the walls, floor and the ceiling are carefully closed with paper layers.

The metal being impermeable to air, the

so integrity of the air space is maintained against percolationf and with the further advantage that the walls are protected against penetration by vermin, such as rats or mice.

The particular means by which these several results are attained are fully set forth in the following specification, reference being made to the drawings by which it is accompanied, in which:

10 Fig. 1 is a perspective view of a corner of a chamber showing the wall in horizontal and vertical section, and the manner of in.- folding the flexible strata such as paper or sheet metal.

F ig. 2 is a perspective view of the angle covering strip of paper.

In the drawings like characters of reference indicate corresponding parts in each figure.

In these drawings 2 represents the space within the chamber and 3 constitutes the studding of any suitable size by which the Width of the air space 4: is maintained. To the inner side of the studding 3 are secured two separate sheathings 5 and 6 of shiplap,

for mainand about three-quarters of an inch thick, the joints of which break with one another, between which one or more layers of tarred or other suitable paper 7 is laid with its joints broken as at 8, suchjoints being further covered with an angle covering strip, 9. The anglecoverlng strip 1s formed of one or more layers o-f paper 10, see F igure 2,

folded longitudinally about a medial line as at 11 to form a right angle strip 12, the 3 extremities of the strip being infolded to form an end 13 for the purpose of'preventing the passage of air between the layers of material at the corners of the chamber.

On the inner side of the shiplap 6 two In layers of paper 14 which break joint with one another, and a sheathing 15 of sheet metal are secured to the shiplap 6 by nails through the'sheet metal into the shiplap and to the inner face of the metal sheathing d 15 is applied a finishing layer 16 of beaver board. 7

To the outer side of the studding '3 are nailed two thicknesses 17 and 18 of shiplap, between which one or more layers of paper HF 19 with broken jointsand an angle strip 9 are placed, and outside that two layers of paper 20 are placed which are in turn covered preferably with a further layer of shiplap 21 if particular good insulation W against heat is required, though this may be omitted if low temperatures are not required to be maintained in the chamber. The outer layer of shiplap is covered with a further layer of paper 22 which is lapped to at the angles and provided with a further angle strip 9 when an outside covering of metal 23 is applied by nailing to the shiplap.

The air space 4 is thus protected not only by the heat non-conducting shiplap, the as double layers of joint breaking paper and I the beaver board, but as these materials are to a certain extent permeable, it is further protected by impermeable sheathing of metal on each side of the air space.

The sheet metal is not only impermeable to the passage of air through it, but protects the wall against penetration by vermin, such as rats or mice, which have been known to penetrate and ruin a refrigerator either from without or from within when having obtained access through the door when in advertently left open.

It is, however, little use in providing and introducing laminae that will prevent percolit) lation of air if care is not taken to see that the air spaces are properly closed at the corners of the room.

The flexible strata of paper and sheet metal is, at the junction of the corners at the ceiling and the floor, folded in a manner that will prevent escape of air from the air pockets outward, or on the outer side admission of air inward to the pockets.

The particular means by which the joints are broken or lapped does not, however, form a material point in this application SO long as care is taken to close the ends of the air spaces with the flexible material embodied in the wall.

\Vhat I claim as my invention is:

1. A wall construction for refrigerator chambers comprising opposing layers of wood defining an air space, layers of flexible material such as paper on one or both sides of the wood, said layers being continued to and breaking joints with similar layers of an intersecting wall, a loi'igitudinal angle strip of flexible material having closed or folded ends covering the intersection and an outer metal covering for the flexible material. V

2. A refrigerator wall construction formed with an air space; each wall of layers of paper interposed between adjacent layers of shiplap and between the shiplap and the metal covering and angle strips exwhich consists of an outer covering of sheet 30 metal, inner layers of shiplap, one or more

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