US669939A - Ice-box. - Google Patents

Description

No. 669,939. ,Patented mar; |'2, |901. F. GERHARD e. L. ANwANDEn.

ICE BOX.

` (Application filed Feb. 13, 1900.! N o M o d el.)

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:UNITED STATES PATENT FFICE.-

FRITZ GERHARD AND LUDWIG ANWANDER, OF ZURICH, SWITZERLAND.

ICE-Box.

SPECIFICATION formingpart` of Letters Patent No. 669,939, dated March 12, 1901.

Application ledlehrnary 13, 1900. Serial No. 5,117, LND model-'1 To LZZ whom, it may concern:

Be it known that We, FRITZ GERHARD and LUDWIG ANWANDER, subjects ofthe Emperor of Germany, residing at Zurich, Switzerland, have invented certain new and useful Improvements in Ice-Boxes; and we 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.

The present invention relates to an improved ice-box for household and commercial purposes, which consists of a double-walled door, a double door, and a double-walled wooden box in which the ice-box is placed over the cooler. The double walls and the double floor form intermediate spaces, which are con nected with each other, as well as with icebox and cooler, so that when the ice-box is closed the air may circulate through all the parts of the interior of the ice-box. By this arrangement a dry and low temperature is obtained in the ice-box and the sweating of the saine is avoided. The circulation of the air between the ice-box and the cooler, on the one hand, and the intermediate walls touching these parts, as Well as the intermediate parts of the door and walls to which they are attached, is effected through openings in said walls. To prevent the entrance and outlet of air when the door is opened, (between the cooler and the intermediate parts communieating with it,) the openings which eect the circulation of air are provided with valves which when the door is opened close 'automatically and which when the door is closed open again. By this arrangement a great saving is effected.

The accompanying drawings illustrate the invention. H

Figure 1 is a vertical sectional view on a plane parallel with the doors when closed, looking to the front. Fig. 2 isa sectional View on a plane cutting through one of the doors. Figs. 3 and 4 are detail sectional views on an enlarged scale.

Like letters of reference mark the same parts in all of the figures of the drawings.

The outer walls of the double-walled wooden box c and the double-Walled door e, as well as the outer wall of the ice-box, are covered on their inside with a thick layer of paint p and are provided with a stout layer of cardboard q, which both layers serve as non-conducting material. The inner walls of the wooden box c and the door e and the inner part of the floor are lined with sheet-Zinc. To prevent leakage of water into the wall-spaces f, the openings CZ between said spaces and the ice-box a are provided with interior protective plates or guards o. The openings g, arranged between the intermediate parts f and the cooler, are closed when the door is opened by springs t', which press the valve-bodies 71, into their seats on the outer sides of the inner walls. When the door is closed, these valves are held open by the arms 71:. When the door is opened, the arms Zt retract from the valve-bodies h and the valves are closed by the springs c'. The air circulation between the intermediate spacesf and the door e of the walls c is effected by two opposing valves r, which cover each other when the doors are closed, which-on the one hand are placed in the frame of the door and on the other side are placed in the edges of the door meeting this frame. The seats of the valves, as well as the springs pressing against these valvebodies, are situated in the intermediate parts f. To each valve-body a pin 3,1eaching through theV valve-opening when the door is opened, is attached. The pins s of the valve-bodies in the frame are situated exactly opposite to the pins of the valves in the doors, so that when the door is closed the two opposing pins will push against each other, when they will be pushed back on their respective valvebodies, whereby the pressure of the opposing pins is relieved, so that the springs of the valve-bodies press them against their seats.

In the bottom of the box, near the back Wall, is situated a clack-valve Z, with a clack that is weighted by a prolongation n. When the door of the ice-box is closed, the valve Z will open on account of the air-pressure arising in the box, and part of the air heated by the opening of the door may escape. A plate o' is provided over the valve Z to prevent a loss of goods.

Having now fully described the nature of this invention, what we claim isl. The combination in a refrigerator provided with an ice-tank, a cooling-chamber below it, and surrounding hollow walls forming an air-space and having openings into both tanlc and chamber, of a valve in the air-space normally closing the opening between the air-space and cooling-chamber, a hinged door, and an arln projecting inward from the door in position to move and hold the valve away from its opening when the door is closed, substantally as described.

2. The combination in a refrigerator, of a double Wall with air-space between and a double-Walled door with interior air-space, the edge of the door and its seat in the double Wall being provided With openings which register when the door is closed, of a valve in the 'eeepse

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