US1875129A - Refrigerating device - Google Patents

Description

Aug. 3 1932- A. E. PAYSON ET AL REFRIGERATING DEVICE Original Filed March 12, 1928 i 1 outrun STATE tainer, pre

Patented Aug. 30, 1932 REFRIGERATING DEVICE Original application filed March 12, 1928, Serial No.

26, 1 929. Serial 110,342,710.

Our invention is for a self-contained cooling receptacle of novel construction adapted to keep the contents at low temperature; For-this purpose we employ a. suitable conferably a jar of the double-walled vacuum type, provided with afsmall compartment holding a refrigerating medium.

one embodiment of our inventionpthis compartment is formed by a double-walled vacuum bottle mounted in the stopper of the receptacle, and the cooling medium ispreferably, solidified carbon dioxide, commonly known in the market as dry ice. The mouth of the bottle forming the cooling; chamber or compartment is closed with; apervious cover through which the carbon. dioxide gas escapes gradually into the receptacle, where it instantly expands with lowering of temperature. This cover is preferably apervious cup adjust-ably fitted to expose more or less area for the escape of the refrigerating gas. This enables us to regulate the temperature in the receptacle, as will subsequently be explained more fully. The receptacle is used for storing and dispensing articles (particularly foodstuffs) that must be kept cold. In-another form of our invention, the refrigerating unit is supported infthe lower portion of the cooling chamber, which may be a double-walled vacuum jar.

The various features and practical advantages of our invention willbe fully understood from a detailed description of theaccompanying drawing, which illustrate two embodiments of our self-contained ating device. In the drawingig. 1 represents a cross-sectional view of one form of our invention in which the re? frigerating unit is supported at the bottom of a double-walled vacuum jar and is closed by an adjustable porous cup;

Fig. 2 is a transverse'cross-section on line 2-2ofFig.1;and

Fig. 3 is a fragmentary sectional View of a construction in which the refrigerating unit is containedin the stopper of the jar.

A spherical base 10, preferably of cast metal,- has supporting'legs 12, which may be cast integral with the base or secured thereto as separate members by suitable fastening refrigerprotects the glass j 260,870. Divided and this application filed February means. This base is provided at the center with a hollow cone-shaped projection 14 which forms a recess 15, for a purpose that Will presently appear. A heat-insulated receptacle 16 is firmly supported in upright position on base 10. In the present instance, the receptacle 16 consists of a double-walled vacuum jar of glass, preferably of pyrex glass, or other suitable material.

correspondingly shaped body of the supporting base 10. The upper cylindrical portion 10 of thebase engages the cylindrical outer wall of the jar 16, so that the tilt on the rounded bottom of these double-walled glass jars have considerable Weight, the jar rests firmly in the base without the needof additional fastening means. It is well known that the base.

lation through which the chamber between the walls is exhausted. The jar 16 has a projecting tip 18 at the center of its rounded s- PATENT oFFiea AURIN PAYSON AND MINER P. WE'IMORE, OF NORWICH, CONNECTICUT latter cannot As double-walled vacuum vessels have a projecting tip or tububase, and this tip extends into the central recess 15 of base 10, so that protected against injury. In some instances it may be desirable or advisable to place a sheet metal jacket 19 around the jar, as partly shown in-Fig. 3. but conceals the contents of the same and improvesthe general outward appearance of the entire device, es,- pecially if the jacket is decorated or ornamented with an appropriate design.

Referring to Fig. 3, the underside of a metal cap 23, as by means ofan adhesive or in any other practical way, is inserted in the mouth of jar 16. This disk is preferably of cork or sulating material and engages of the jarin a tight frictional fit. The sheet metal cap 23 is providedwith a cylindrical flange 24 adapted to fit over the upper end of jacket 19 and engage the same in frictional contact to make a tight yet separable joint.

the tip is fully This jacket not only 1 other heat-inthe inner wall ion . be employe with a flange 28 adapted to rest on the disk 22. A hollow grip or knob 29,

sheet metal, is attached to the upper end of stopper.

stopper 27 has a flange holding; engagementiwith the flange 28 of the 'A double-Walled vacuum bottle 46 is inserted in the axial opening 32 ofstopper 27. The bottle 46 fits so tightin the openings that no additional fastening means is needed.

fire'l ieve excessive gaseous pressure in ar 16,

" In the present case, the knob 29 30, Which is spun or. turned into The hollow knob or grip 29 pertor'n'isl the double tunctionof a handle for stopper 27 and apretective'casing for bottle' td whi ch hol ds i a refrigerant diagrammatically indicated by the block 33. .Atthe present time-we touse a retrigerant'i'n the refer form of solidified carbon dioxide, Whichlis popularly known in e the trade as dry ice, kind of; refrigerant but, any other practical d or cooling. medium The hof bottle 4.6'is closed shaped stopper 47,

which. consists; 0m materiaP PBIWIOUS to the passage of, gaseous car:

bon dioxide. f in bottle 456 so asto expose a pred The'cu-p 47 is adjiistabliyjfitted waited area. and. thereby regulate the escapeef gas.

In this is possible 'to-co-ntrol the'texnr curacy.

perature in tar 116' For example, i should be kept at about'lfii thiii a-fairrange 0? acice creameonctections R 'above zero to befin nice eatahle condition. ,For. yeast cakes,the temperature ought'to F. above zero. made of various materials adapted toper mit' thegradii'al' escape oi gas. materials We may mentioncardboard, unglazed, porcelain, porous earborundum, granular com-, pressed cork, solid cork withlperforations, leather, cloth mounted cement, emery,

bee bout, 4;.0 The previouscupM" can be I Among. such mold-ed wo d on a frame fitting into the"bot'tle,,andi other materials-alongthe same line.

The" operation of the refrigerating appasentences.

ratus above described Will be -'clearly under it may be summarized in a few The heat-insulated jar 16 is adapted to hold foodstuffsand other. air,- ticles that shouldlbe kept low temperature,

such as ice cream contectiens,-certain kinds of candles, yeast cakes, andsoon. 1 fied carbon dioxide S I i= or dryice is packed into the double-Walled bottle 46'. This so called dry ice has a temperature greesF'ahrenheit below zero. oxide gas is'tormed by, slow evaporation ef the, dry ice, the gas escapes.

of about 11455 def As carbon dithrough the por one cup 47 into jar I6, wherefita expands and lowers the surrounding temp,eratl ire.

The rate of evaporation of refrigerant depends on the temperatureinside thejar and I on the degree of perviousn-ess-of cup47 Ob viously, the greater the exposedfarea ofthe cup,- the faster will the dryjice evaporate.

' I 55 Therefore,

by 'ning of regulating preferably of lated expanded gases the eese the exposed area of cup47, it is possible to obtain (Within reasonable limits) the desired temperature inreceptacle 16. The accumuin the jar pass into the atmosphere .Whenthefstopper 27 is removed for access to the contents. The st0pperlfitsingthefopening of disk 22 with suficient looseness' to'be easily removable, and "the'opening 26is big enough to permit the insertioa motixa 'gltgmay be'advisable to I.

provide a small vent in disk 22 andcap 23 to in the eventot the stopper27 not being lifted in time a; allow the escape of accumulated gas. --"It} should be noticed that the heatinsulated bottle or container 46 prevents, the I escape of ref rigerating gasfl except through hera eesc fi' Theeonstructijonot Fig/,1 diflt'ersifrom that Fig.5 mai'nl-y in having the refrigerating unit. mounted'atth e bottom of jar 16 instead ojf'in the tOpperlThe-j ar 16 of Fig. 1 contains perforated plate 36; havingintegral jupstanding' arms 37' shaped. to engage theiinner wall fot the jar; The upper ends teleb e pee: against la m r m w ee n e t s eiaea Aer- I inderfl38 is mounted 'onjplate 36'byrivet's 39',-

a he lrkeganai theicharnber} @010: the e iso. that; thebottle is: firmly gripped and held position, and yet is easily removed.

Sincefthe" stopper in the bottle OfFigQl does not carrythe refrigerating unit,.5it can in disk &9 andicap EiO relieves excessive gaseous' pressure in the.j ar,f asmorefully ex- Tpl'ai'ned'inconnection withFig. 3. l A knob or other finger piece5 3=isattached to cap 50 *What has beensaid in any" practical ay; about the operation 'of the refrigeratingunit in Fig 3 applies toFig. llwithout the need of repetition, We need onlyaddthattheperforated" plate 36 allows'the evaporated carbon d b p f it heieres d, are:- iiiovable dome or cover 48. (.pertoratedv or solid) may be mounted; oil-cylinder 38.t0. pro- I 'tect-the refrigerating unit. ".To replenish the r e a ,9 37iqf'thearms3f 7 extend for s ifiei s; I tance along thecyl'ndrical f inner Wall of jar 9 d that 3" bottle is I inserted; between 1o: terjact like; resilient. levers held at points44t,

11' be of simplerfconstructionthan the stopper arms 43 together with the stopper cup 47, leaving the supporting parts 36 and 41 in place, but the whole outfit can be taken out if necessary.

Although we have shown and described certain specific constructions, it is understood that our invention is not limited to the details set forth. The underlying principles of our new refrigerating device can be mechanically carried out in various other ways without departing from the scope of the invention as defined in the appended claims. This application is a division of our copending case Serial Number 260,870, filed March We claim as our invention:

1. A refrigerating unit consisting of a stop per adapted to fit into a receptacle and having an axial opening in which a heat-insulated bottle is mounted, said bottle being adapted to contain a refrigerant in the form of solidified gas, and a removable pervious cup closing the mouth of said bottle to permit the gradual escape of gas.

2. A double-walled vacuum jar having its mouth covered by a disk comprising heat-insulated material, said disk having an opening large enough to permit the insertion of a hand, a stopper removably fitted in said opening, said stopper being provided with an opening in which a double-walled vacuum bottle is supported, said bottle being adapted to hold a refrigerant in the form of solidified gas, and a pervious cup closing the mouth of said bottle to allow the escape of gas into the ar. 1 8. A refrigerating unit consisting of a cork stopper having an axial hole therethrough in which a double-Walled vacuum bottle is frictionally held, said bottle being adapted to contain a refrigerant in the form of solidified gas, the mouth of said bottle being at the bot-- tom of said stopper and the base of the bottle extending beyond the other end of the stop- 15 per, a hollow knob mounted on said stopper to cover the projecting base of said bottle, said knob also serving as a handle for the stopper, and a pervious cup adjustably fitted in the mouth of said bottle to permit the escape of a gas. AURIN E. PAYSON.

MINER P. WETMORE.

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