US 1712085 A
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Description (OCR text may contain errors)
Mai 7, 1929- T. J. LITLE, JR 1,712,085
REFR IGERATING APPARATUS Filed May 8. 1926 2, Sheet-Sheet l 7 INVENTOR. (5 +5 WMA/#5f ,J/ 715 J?. /0 BY AM ATTORNEY.
May 7, 1929 T. J. LITLE, JR v 1,712,085
REFR IGERATING APPARATUS Filed May 8, 1926 2 Sheets-Sheet 2 I ,YI/EN TOR.
MM I l ATTORNEY.
Patented May 7, 1929.
UNITED STATES rATl-:NToFl-lc-E.
THOMAS J'. LITLE, JR., 0F DETROIT, MICHIGAN, ASSIGNOR TO COPELAND IRODTJ'GTS,l I INC., OF DETROIT, MICHIGAN, CORPORATION 0F MICHIGAN.
Application led Kay 8,
My invention relates to improvements in refrigerating apparatus, and more articularly to the heat absorbing unit of t e compresser type of' refrigerating machinev which is generically termed the expansion chamber.
It is the primary object of my invention to provide a heat absorbing unit of a simple and cheap construction.
With these and other objects in View, my invention consists in the'arrangement, combination and construction of the various parts of my improved device as described in the specification, claimed in my claims and-shown in the accompanying drawings, in which:
Fig. 1 is a plan view of the metalsheet which forms the base of my device.
Fig. 2 is a cross section taken on line 2-2 of Fig. 1. l
Fig. 3 is a plan view showing the second metal sheet imposed over the surface of the metal sheet which forms the base of my device, and also showing the line of Weld by which the two sheets are attached.
Fig. 4 is a cross section taken on line 4--4 of Fig. 3. y
Fig. 5 is a plan View showing the second sheet imposed over the base sheet and also showing the location of spot welds by which the two sheets are, at various points within their edges, secured together.'v
Fig. 6 is a cross section taken on line 6-6 of Fig. 5. f A
Fig. 7 is a plan view showing the means by which pressure is applied to expand the unattached inner surfaces of the sheets forming my device.
, Fig. 8 is a cross section taken on line 8-8 of Fig. 7.
Fig. 9 is a vertical cross section of a refrigerator cabinet showing lmy device installed.
In Fig. 1 I have shown a square sheet of metal 1, with circular openings 2 and 3 stamped therein adjacent the edges of two sides of the sheet, said openings 2 and 3 being formed with circular lips 4 and 5 extending outwardly and at right-angles to the surface of the sheet 1 ass own in Fig. 2 and said lips 4 and 5 being internally threaded to receive pipes or other threaded fittings.
Metal sheet 6 is then imposed upon that side of sheet 1 which does not carry the extended lips 4 and 5. The edges of said 5 and secured therein by fitting 11, thereby,v
closing opening 3 as shown in Figs. 7 and 8. Air, or other like pressure is then applied. through pipe 10 to expand and bend away from each other between the spot welds, the
unattached inner surfaces' vof sheets 1 and- 6, thereby producin a suilicient space between the inner surlfyaces of sheets 1 and 6 to permit the circulation of liquid or gas refrigerant between the surfaces of the sheets 1 and 6, and to cause such circulation to be along a devious path. The device formed, as descrlbed, by sheets 1 and 6 may then be bent as indicated in Fig. 9, (it beingsunderstood, however, that the bending may occur prior to welding and expanding), so that the lips 4 and 5 may be connected with pipes 12 and 13extended from .the heat dissipatin mechanism of a refri lerating machine not shown) through the cabinet 14. The sheets 1 and 6 thus bent and connected with the pipes 13 and 14 as shown in Fig. 9,
form a basket-like, or substantially U-shaped container in which may be placed ice trays 15 and 16.. This basket-like. container so formed and described may. be supported in the cabinet 14 by a perforated metal or wire mesh partition 17, which is attached to the inner side walls of cabinet 14 as shown in Fig. 9.
It is evident that the above described heat absorbing mechanism may be much more cheaply and easily constructed than the expansion coils, expansion chambers and brine tanks now in chmmon use, and that it has the additional advantage of providing a container in which may be placed the various articles usually desired to be frozen. 'The device when in operation has a much quicker freezing action upon articles placed within it, than the expansion coils, expansion chambers and brine tanks now commonly used, because it provides for the articles to be frozen, a greater are-a ofcontact with the heat absorbing surface than is provided by the other constructions mentioned, and reduces to a minimum the number of conductors through which the heat must before heilig absorbed.
It is obvious that various changes may be made in the arrangement, combination and construction of my improved device Without departing from the spirit of my invention, and it is my intention to cover by my claims pass such changes as may be reasonably included' within the scope thereof.
What I claim is:
1. In a mechanical refrigerating system, a refrigerant expander unit including two sheet metal plates joined at their peripheral edges and bent to form a container of substantially U-shape, the bottom of said container adapted to serve as a shelf for trays, the sides of said container extending ulpwardly from the bottom thereof and t e free ends of said sides being bent inwardly towards each other, an inlet for one of said bent ends, and an outlet for the other of said bent ends.
2. An expansion chamber for a refriger- THOMAS J. LITNLE, J R..