Патент USA US2119320код для вставки
May 31, 1938. 2,119,320.. E. DOBROW$KY> R?FRIGERATOR Filed June 23, 1956 O z m BY a n Z ?w w W z. FAmw m5zoW „W R. S. Patent?d M?ysl, 1938 I 2,l19,320 _ 'uNiTED sTATEs„2,119320PÅTENTŸoF-Fic-E Í _aEFmGEaA'ron ' › p Emmanuel Dobrowsky, New York, N. Y; Application June 23, 1986, serial No. 86385,,-Å 1 Claim. (ol. vsie-_min throughithe _door of the food compartment; and This invention relates to refrigerators, an ob Fig. 6 is a sectional elevation on the line 6-6 p ject of the invention being to provide a -refrigera i v › tor and more speciflcally the modern 'type of of Fig. 5. mechanical refrigerator with means for main ` The reference Character A is employed to indi cate generally a refrigerator which, as above ` 5 taining a partial'vacuum in the food compart pment. This means includes a suction pump or stated, is of the modern mechanical type.` The other suitable device which operates to draw refrigerator A has a food compartment I and w air out of the food compartment, and this not a door 2 to close the same. As it is necessary in only creatés a partia] vacuum in the food com io partment but it, also draws off odors frornthe food compartmentso as to prevent the lcon tamination of one article of food by odors from another or other articles of food. The principal object of the' invention, therefore, is to create or) 15 maintain a partial vacuum in the food compart ment which 'assists in the preservationi of the` tight, the door and preferably the wall of the 10 opening in the casing are provided with suitable packing material 3 to render'the closure airtight when the door is closed. 'I'he food compartment | is provided with an air outlet chamber 4, pref erablý having a screened entrance end 5 and 15 constructed with a port 6 adapted to be closed by a check valve 1. 'This check Valve is prefer foods in their proper condition; reduces the tem perature within the food compartment, and car ably of rubber or' other suitable material so' as ries oñf odors from the, food compartment. ` 'to insurean lairtight closure. The chamber 4 the food compartment and raise the lpressure is connected to an outlet pipe 8, which isÅ opera 20 tively connected to a. suction pump 9 and this suction pump 9 is driven by an electric motor Ill. It is of course to be understood that the motor and pump may be located wherever found most therein to atmospheric pressure;v but when the convenientl A further objectis to provide means of this 20'character which are automatic in.their opera tion so that when the door of the refrigerator is opened it will, of course, permit air to rush into 26 'my invention to have the food compartment air door i`s again closed a partial vacuum creating ` means lwill be automatically started and .auto . l _ 25 In the food compartment i a ?xed electric p contact il is provided which is adapted to be en matically stopped when the pressure is loweredlu gaged by a movabie contact arm |2. This arm |2 to the desired extent. 30 ` ; _ With these and other objects in view, the in vention consists in certain novel features of construction and combinations and arrange is illustrated as pivoted between its ends on a pin? i |3 mounted in a bracket M and operatively con 30 nected at its end to a diaphragm IE which is ~secured over a screened opening IG in the wall of ` the casing. A spring contact brush |`l exerts pressure on one end of the arm tending to 'move it toward the fixed contact II, and a stop |8 is 35 provided in the casing to be engaged by the arm In the accompanying drawing i2 to limit its movement away from the fixed con Figure 1 is a perspective view of my improved tact li. In 'the food compartment i a spring refrigerator showing the door to the food com pressed'plunger switch l9 is located and is mov partment in open position; . able in a casing 20 and adapted when in its in Fig. 2 is a fragmentary view partly in Vertical i 40 section through the refrigerator and showing Ward position to close the circuit between two one means for operatively connecting the food contacts 2| and 22. The outer end of this plunger compartment of the refrigerator with a suction switch |9 is in the path of movement of the door 2 so that when the door is opened the spring pump, and this view, which is partly diagram ` ments of parts, all of -which will be more fully hereinafter described and pointed out in the claim. ' ` 45 matic, shows the position of the parts when the i desired pressure has been lowered su?iciently in the refrigerator and the pump is not Operating; Fig. 3 is a`` fragmentary view similar to the fragmentary sectional portion of Fig. 2, showing 50 the position of the parts when the pump is'op erating; _ Fig. 4 is a fragmentary view in horizontal sec tion through a portion of the' door and casing, this view being taken on the line 4-4 of Fig. 5; 55 -Fig. 5 is a fragmentary'view in Vertical section pressed plunger switch will be moved 'forwardly 45 ' to open the switch, and when the door is closed - it will force the plunger switch inwardly to cause the same to engage the contacts 2| and 22 and ?' close the circuit. I have illustrated diagram maticaily in Fig. 2 an electric circuit which might be employed in connection with my improved ap paratus. In this circuit 23 and 24 indicate lead-in 50 wires from the ordinary city service. The wire 2! is connected to a pole 25 of the motor Ill and a wire 26 connects the other pole 21 of the motor 55 . with the ?xed contact I|_. The contact brush l'l tion by means of a pin or rivet 31. is connected by a wire 23 with the contact 2| and the other contact 22 is connected to the lead Wire portion of this valve is preferably thicker than the rest of the valve and the thinner edge por tion of the valve normally covers the air duct 36. 23. The operation of the mechanism above de scribed is as follows: When the door 2 is opened 10 15 20 25 The central The crank arm 33 may engage 'the central por tion' of the valve and operate to assist in closing the air from outside will of course rush into the the same and holding the same in closed position. food compartment and equalize the pressure within and without the same. When the door is open, therefore, it is desired that there will be no operation of the pump and this is prevented by reason of the factthat the piunger switch will spring outwardly and maintain open circuit as long as the 'door is open. Further, when the pressure in the compartment is raised the dia phragm |5 will return to a straight or normal position, as shown in Fig. 3, which movement causes the contact arm 2| to en'gage the ?xed contact H. The circuit will not be closed until the door is closed as above explained. As soon as the door is closed and the circuit .to the motor Ill is closed, this motor will operate the pump 9 to draw air out of the refrigerator past the check valve 1, and when the pressure in the refriger ator is su?lciently lowered or, in other words, when the desired partial vacuum is reached, the A chain or other ?exible connecting device 38 connects the lower edge portion of the valve 35 with the arm 33 so that when the handle 32 is 10 moved outwardly and upwardly .to move the latch bar for engagement with the keeper 3|, the arm 33 operates to draw the ?exible edge portion of valve 35 from over the air duct 36. Thus a cer tain amount of air will rush into the opening 34, facilitating the release of the valve 35 and the continued movement of the handle 32 will draw the valve 35 away from the opening 34 allowing additional air to rush into the food compartment to raise the pressure therein and to make it easy 20 to open the door. When the door is closed the valve 35 will of course close the opening 34 and the duct 36 so that vthe pressure within the food compartment can be reduced as desired. While I have illustrated and described what I believe to be the preferred embodiment of my diapnragm Is W111 be drawn mwardiy to the ' invention, it is obvious that various slight changes position shown in Fig. 2 of the drawing, which may be made with regard to the form and ar will result in causing the contact arm |2 to move rangement of parts without departing from my 30 away from .the contact || and open the circuit, thus stopping the motor until for some reason or other the pressure within` the refrigerator should again rise. ' As it is well known-that it would be di?icult to invention, and hence I do not limit myself to the 30 precise details set forth but consider myself at 'liberty to make such changes and alterations as fairly fall within vthe spirit and scope of the claim. I claim: , 35 open the door of the refrigerator when a partial vacuum is in the food compartment, it is neces The'combination with a refrigerator having a sary or 4at least desirable to provide a means food compartment and a door thereto, a pump which will permit air to enter the compartment operatively connected to the compartment and when the latching means of the door'is operated. adapted to maintain a partial vacuum thcrein, This means is shown in detail in Figs. 5 and 6 `said door having an air inlet opening, a valve of the drawing. I have illustrated a latch box normally closing said opening, a latch on the 29. secured to the outer face of the door and in door operatively connected to vthe `Yvalve and which a-latch bar 30 is mounted to, turn and is adapted to open the valve 'when the latch is' adapted to engage a suitable keeper 3| on the moved to open position, said valve having a flexi casing. An Operating crank handle 32 is ?xed to the latch bar 30 and carries within the box 29 a crank arm 33. The door 2 of the food compart ment is provided with an opening 34 communi cating with the interior of the latch box 29 and a valve 35 normally closes this opening. A small air duct 36 is provided in the door communi cating with an opening 34 in the latch box. The ' valve 35 is preferably of the flexible disk type, as shown, secured to the door at its upper por ble edge portion, said door` having an air entrancc ductvcommunicating with the air inlet opening in the door normally closed by the edge portion of the valve, and 'a flexible device connecting the latch with the edge portion of the valve whereby the edge portion of the valve will be ?rst lifted to open the duct when the Iatcnmechanism is operated. EMMANUEL DOBROWSKY.