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Publication numberUS1412687 A
Publication typeGrant
Publication dateApr 11, 1922
Filing dateSep 7, 1920
Priority dateSep 7, 1920
Publication numberUS 1412687 A, US 1412687A, US-A-1412687, US1412687 A, US1412687A
InventorsKnutson William K
Original AssigneeKnutson Vacuum Refrigerator Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1412687 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




l A l 2,68% Patented Apr. M, 1922.




Specification of Letters Patent.

)Patenten apr. M, ieee.

T o all whom t may concern.'

Be it known that I, YVILLIAM K. lNif'rsoN, a citizen of the United States, residing at Wichita Falls, in vthe county of Wichita,

State of Texas have invented certain new and useful Improvements in Refrigerators; and l 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. This invention is a refrigerator, and the broad object thereof is to construct the same with its Walls and doors of wood packed with comminuted material, separated by a vacuum chamber or jacket from an inner shell which surrounds the food space, the shell by preference being of reinforced concrete, whereby the food will never be contaminated by the outer wall nor the outer wall ever receive dampness from the inner Shell or its contents.

rThis object is carried out successfully by the construction hereinafter described, and

shown in the drawings wherein:

Figure 1 is a horizontal section through the ref rigerator.

Figure 2 is a vertical longitudinal sectional view on the line 2-2 of Figure 1'.

Figure 3 is a vertical transverse sectional View on the line 3-3 of Figure 1.

rlhis refrigerator is an ordinary ice boX whereof B designates the back or rear wall, E the end walls, D the. doors, and S the space for containing food and ice. lt is desirable that the exterior of the walls of the usual refrigerator be of wood or like material, or at least that wood shall appear on the exterior. Accordingly the numerals 10 and 11- designate the rear and end panels of wood, and 12 are L-shaped corner posts.

Within the door and within each wall panel is disposed a packing 21 of comminuted material such as charcoal, sawdust, or the like, in the form of slabs or plates and this material is held in place against the walls 10 and 11 in any desired manner. Spaced inwardly from said plates 21 is inner met-al shell 25.

To hold the metal shell 25 in proper spaced position within the composition walls 21, vangle plates 41 are employed. Spaced inwardly of the inner shell 25 are the shells of reinforced concrete 29, the inner face of each of which may be coated with some moisture-proof material. Spacers 3() hold the concrete shells and plates 25 apart to provide a cold air space 31, while spacers 26 hold the concrete shells in spaced relation to the metal shell 25.

The inner concrete shell is divided into four separate chambers LF', F2, and F3, the former containing ice, and the other three being adapted to contain food. 1n the lower portion of the ice chamber I there is mounted a metal ice shelf 32l having perforations for the passage of the drippings of the ice. ln the bottom of the chamberl is located a drip pan 33, which receives the vdrippings which pass through the ice shelf 32. In one side of the ice chamber Lat a point between the pan 33 and the shelf 32, 'there is formed a cold air outlet'34. It will be noted that there is a cold air space 35 extending vertically between the iceJ chamber l and food chamber F3, on the one side, `and the two food chambers F and F2@ o-n the other side. Between the bottom of the chamber F and the top of the chamber F2, is a horizontal cold air passage 36, and a similar passage 37 between the Abottom of the water pan-33 and the top of the food chamber F3 therebeneath. These horizontal air passages communicate with the vertical spaces 31 outside of the said chambers. The inner end of the passage 36 is disposed opposite the said opening 34, so that the cold air which passes out of said opening will be divided, a part of the same passing upwardly between the chambers T and F, and the other downwardly between the chambers F2 and F3, and thence around the bottoms of 'the latter .chambers and upwardly and outwardly of the other chambers where it reenters the ice chamber l through an opening 39 in the top thereof. A pipe 40 leads from the drip pan to the exterior of the refrigerator, where it is provided with a faucet for draining the water 'from the pan, or for drinking purposes. Normally the water remains in the pan and helps to cool the contents of the refrigerator.

Suitable spacers 41, disposed between the different chambers, hold the chambers in proper spaced relation so that the air pas sages are clear for the passage of the cold air from the ice chamber.

What -is claimed is:

A refrigerator including an outer wooden shell, a composition shell secured to the lil@ Wooden shell and arranged therewithin, a metal shell held in spaced relation to and within the composition shell, composition compartments spaced Within the metal shell and fromeach other to provide cold air passages therearound and therebetween, one of the compartments providing an ice chamber communicating with the said cold air passages, the lower portion of the ice chamber 10 being formed to provide a drip pan and Lambs? communicating with said passages, 'spacers between the shells, the ice chamber having an air receiving opening in its upper Wall.

In testimony whereof, I aix my signature in the presence of two witnesses.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5291746 *Mar 10, 1993Mar 8, 1994Abbott Derwood CContainer for storage, collection and transportation of medical waste
U.S. Classification62/405, D15/81, 62/441
International ClassificationF25D3/00, F25D3/04
Cooperative ClassificationF25D3/04
European ClassificationF25D3/04