US1791041A

US1791041A - Combined refrigerator and ice-cream freezer

Info

Publication number: US1791041A
Authority: US
Publication date: 1931-02-03
Anticipated expiration: 1948-02-03

Description

Feb. 3, l93 l. l A. FL sAwYER l,791,041

UOMBINED REFRIGERATOR AND ICE CREAM FREEZER Filed Sept. 27, 1929 /2 Invenor.

Parent-Seb. y3, 1931 UNITED STATES AT .BERT E. SAWYEE, E

PMFENT' OFFICE HAvEEHTLL, MASSACHUSETTS, ASSIGNOE To IEvING L. HEiTH,

0E HAVERHTLL, MASSACHUSETTS Application led September 27, 1929. Serial No. 395,560.

, non-freezing liquid, usually called the brine' tank, is usually located in the top portion of the ordinary domestic refrigerator and is usually accessible through a front door only, necessitating the location of the freezer container in a horizontal position, in which posi-- tion it is not only difficult to ll the container with the liquid to be frozen, but also the removal thereof is attended with some difficulty. It is also frequently inconvenient to operate the stirring device in the position in which the container is necessarily held, and

it is necessary to have the door of the refrigerator open while turning the stirring device.

The objects ofthe present invention are to obviate the difficulties or objections above referred to, and, at the saine time, to provide a means which will enable the usual inconvenience to be avoided which are incident to freezing ic'e cream by means of mixed ice and Salt, and to enable the operation to be performed much more rapidly than with the usual methods.

I accomplish the objects by theA means and in the manner hereinafter rdescribed and illustrated in the accompanying drawings, in which: I

Fig. 1 is a sectional view of an ordinary refrigerator brine tank embodying my in-v vention. FFig. 2 is a sectional view at line 2--2 of Fig. 3 is a detail view, in side elevation partly broken away, of the freezing unit.

' In the drawing a brine tank 1, which may be of any Suitable form, is'illustrated, which will be filled with a liquid which does not freeze at the temperature to which it is likely to be lowered. i

According to my invention Said tank is provided with a cylindrical recess which opens to the front side wall of the tankrand is formed by a metal, cylindrical wall 3 which extends horizontally therein and is closed at its inner end, the outer end or the rim thereof being soldered,or otherwise permanently connected to theside of the Vtank about said opening, ,so as to form a liquid tight connection therewith. The temperature in the brine tank may be maintained at any point which is considered necessary, by any suitable means, preferably by an expansion coil arrangement similar to that disclosed in my said application, and comprising a primary coil 4, which is arranged about the wall 3 in close contact therewith, and a main coil 5 which is connected to the coil 4, in series, so that when the refrigerant passes throu h the expansion valve 6, ,it first flows throug the coil 4', and then through the coil 5 before it passes to the exhaust side of the circuit. The temperature of the coil 4 about the wall 3 will thus be somewhat lower than the temperature In other portions ofthe tank.

I further provide a cylindrical metalreceptacle 7 having a bottom 8, and a top 9, said receptacle being adapted to be fitted somewhat loosely into the recess enclosed by wall 3. The top 9 is provided with a central circular opening into which a metal cylindrical container 10 is fitted, a permanent liquid tight joint beingprovided between said top and the-side of the container, and a series of radially. disposed metal ribs 11 are provided between theouter surface of the container 10 and the inner Surface of the receptacle 7 which extend for approximately the length of the container and have a solderedv joint connection with one of said Surfaces and engage the other.

A series of similarribs 12 are also provided between the bottom of the container and the bottom 8 of the receptacle, the edges of said ribsbeing permanently connected to one or the other thereof. A liquid tight jacket is thus provided entirely about the sides and inner end of the container, a filling opening therefor being provided in the to 9 which is closed by means of a plug 13. closure 14 iS provided on the outer end of the container and a rotary stirrer 15 having a crank 16 is cle will be inserted in the recess of the tank,

supported, the sides of said receptacle being \conneeted to the sides of the container adas indicated in Fig. 1. As a result, the temperature of the liquid in the receptacle will be reduced approximately to the temperature of the coil about the wall 3, and the relative freezing point of theliquid and the temperature to which it will be reduced.will, preferably, be such that the liquid will become semifrozen, or changed to slush ice, with which condition the most satisfactory results, for

the purpose, will be secured.

When cream, or other liquid is to be frozen, the receptacle will be removed from the recess in the tankl and placed on its bottom, as in Fig. 3, and then the container will be-filled and-the stirrer will be turned until the contents have been suiiciently frozen, the action of the semi-frozen liquid in the receptacle, which at the beginning of the operation will ordinarily be approximately zero F., being the same as if the receptacle contained a mixture of ice and salt, except that the freezing action will be much more rapid than with ice and salt, as, with the latter, the freezing temperature is usually not secured until a strong brine has been formed, while the inconvenlence of preparing this mixture is entirely obviated.

When the contents of the container has been frozen sufiiciently, the receptacle and container will be reinserted in the recess of the brine tank, where the freezing operation may be continued, and the frozen condition of the contents may be maintained indefinitely.

The freezing operation may be performed while the removable parts are inserted in the recess of the tank, and, while this operation might thus be performed somewhat more.

quickly, it will usually be much more convenient to operate thestirring device while the parts are removed. However, by having the containersurrounded with ice, or semi-fluid ice at a temperature much lower than the freezing point of water the rapidity with which the freezing operation will be performed will be greatly facilitated, as compared with the results which would be secured ifvthe container were directly fitted to the recess in the tank.

I claim:

point of which approximately-corresdponds to the freezing temperature require in the container, and a refrigerating device having a recess adapted to receive said receptacle and to reduce the temperature of the liquid in said chamber to the desired point.

, '2. A freezing device of the character described comprisin a container having a stirring device an aclosure for the top end thereof, a receptacle entirely enclosing said container, except at the top thereof, the sides of the receptacle being connected to the sides of the container at the top ends thereof and providing a liquid tight chamber about the sides and bottom of the container, said chamber having'alow point freezing liquid thcre` in and a refrigerating device 11a-ving a recess adapted to receive said receptacle and reduce the temperature of the liquid therein to the temperature -required to freeze the contents of the container. y

3; A freezing device of the character described comprising a container having a stirring device and a closure for the top end thereof, a receptacle entirely enclosing said container, except at the top thereof, the sides of the receptacle being connected to the sides of the container at the top endsthereof and providing` a liquid tight chamber about the sides and bottom of the container, said charnber having a low point freezing liquid thereon, a series of heat conducting ins extending between the sides of the containerand the sides of the receptacle Within said chamber, and a refrigerating tank having a recess therein opening to one side thereof and into which said receptacle is adapte'd to be loosely tted to reduce the temperature of the liquid in the receptacle to the temperature required to freeze the contents of the container.

In testimony whereof, I have signed my name to this specification.

ALBERT F. SAWYER.

1. A freezing device of the character described comprising a container havlng'a closure at its top and a stirring device therefor, a receptacle within which said container 1s jacent the closure thereof to provide a liquid tight chamber about tlle container, said chamber having a liquid therein, the freezing