US 1926240 A
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Sept. 12, 1933. H. H. MAAs VENTILATED REFRIGERATOR DISH Filed March 15, 1933 retested" Seph' 12, 1933 umran srArEfs PATENT orrl'cs in g vsnms'rsn ans-momma nrsn Harvey B. Moss. shebonan. wa,-m to The Vollrath 00., Sheboygan, Wis a corporation of Wisconsin Application when 15, 193:. Serial No. seam .5 Claim. (01. oz-1) My invention relates to refrigerator dishes of the pan and cover taken on the line 3-3 of the type adaptedto retard the rate of dehydration Fig. 2 and passing through opposite corners of of vegetables, meats and the like in mechanical the dish; and I refrigerators, by provision of restricted ventilation Fig. 4 is a view similar to Fig. 3 but showins 5 between the pan and cover. My invention, which the cover in the position assumed when the, upper is'in the nature of an improvement over the venright-hand (Fig. 2) corner of the cover is detilated refrigerator dish shown in Cornell Patpressed. ent No. 1,843,918, is concerned with the elimi- The pan is preferably stamped or pressed nation of the rattling ofthe cover under vibrafrom a single piece of sheet metal without seamtion, and the construction of an arrangement of ing or welding and it comprises a bottom 11, ends infltmmentfllties p v l mh non-rattlins 12a and 12b, sides 13c and 13d, and an outwardly support for the cover-particularly a three point turned upper continuous flange or rim 14. convex p nsion. in cross section and terminating at its outer-most Theoretically, a cover such as shown in the edge in a downward direction. The corners Cornell patent should rest solidly. and non-vibraformed by the edges and sides are not square tionally by its support on the four protuberances corners, nor are the corners of therim 14 mitered, 1' r -n es at vthl! m in h p phbut instead they are turned through arcs of general recesses ofthe cover which receives the up? erous radirto avoid sharp corners.' per marginal lip or rim of the pan. But in prac- The cover 15 is likewise pressed from a single h the -WW 0! I cohllderflble D piece of sheet metal-andlike the pan, it may subtion of the ordinary production of enamel ware wequently be enamel-unless, for example, it be covers-such refrigerator dishes usually being made of stainless steel-and comprises a flat field mad f enam l W -fr quently results in the 16 bounded by a pair of peripheral recesses 17 and coplanar. As a consequence such covers are susouter recess 18 faces downwardly,the two recesses p ih kins s ishtly yhich will produce of the cover being formed by'pressing the peripha chattering or rattling if the dish is set in vicry of the cover sheet into S-shaped cross section. bratio'n as by the vibration of the refrigerant 'At each side the respective center lines of the mp which 1! usually mounted in or on outer recess 18 and the rim 14 are in the same ver- 80 the refrigerator. tical plane, whereby the rim 14, which has a To limin this Objection and to permit oi smaller radius of curvature, is adapted to be re-; greater .manufact-uring tolerances, l; eliminate ceived in the recess 18. By the three protuber one o the fou supp i s 'pro u rances, leavsneeeso, 21 and 22 across the valley of the recess ev n. fi and self- 118111118 upport for the cover recess 18 is spaced a fraction of an inch above to'hold it against vibr tion under vibrations of the crown of the rim 14 as will later be disc such low magnitude as would probably be en-" ingrea'ter detail, The outer-most flange l9 of'the countered'in the vibration of the mechanical uni cover, which is also the termination of the recess to which an electric Y reirlserator is subiected- 18. extends downwardly substantially as far as the 4 My invention 18 P r y concerned with the outer-most down turned edge of the rim 14 for the dispo i n, m l 8nd lflmmeht 0! the purpose, among others, oi utilizing the outerthree suvportins vmwberm h h I retain mm edge or the recess 1a to the best advantage and the construction and proportioning of the in preventing the com u n by-engmng the other elements to overcome problems created by outebm'o mt or the m the use of i three W m for the The reverseside 18E of the stocifonning the cover.
recess. 18 preferably extends as high asor perhaps with a trifle higher than the field 15, so that u the features and, advantages of my invention are set cover inverted and l u a I for thcom forth in the following description of; a specific tents of the dish, the convex bead 18R will afford embodiment thereof and illustrated in the so a l m I or the cover when thus companying drawing wherein:
m. 1 is an end view of the refrigerator m. reversed, upon a table top- If. i indicated i comprisingo. pan and o r; the drawing, the field 15 is a trifle, lower than the -bcad18R,thelatterwillserveasamarginalbead 4m. in top view thereof; 56 rim/ ads a diagonal vertical section through to limit,lateral shifting of another .1118 only three whi COB-mim a l fl i n ly 18, the cover is so supported that the valley of the Q f l pp r i protuberance! not 1118 w l 18. The inner recess 17 faces upwardly while the certain extent contact thecrown of the rim 14 as an auxiliary limit on the lateral shifting of the cover. 'Further, as explained in the Cornell patent, the bead 17R forms a drip line from which any moisture condensing-on the battle-like inner surfaces of the cover adjacent the ventilating gap between the rim and recess 18, will be dropped down into the interior of the pan.
Adverting to the protuberances 20, 21 and 22 which hold the cover space from sealing contact with the rim, each protuberance is formed by a cross-notch pressed into the stock of the recess 18 and bridging across the valley of the recess 18 as best shown at the; left-hand end of Fig. 3. The contact of these protuberances with the crown of the rim 14 of the pan support the cover upon the pan with the crown a spaced distance away from the recess 18 to afford a restricted air passage into and out of the interior of the pan through a gap which is continuous around the periphery except at the protuberances. Two of the protuberances-20 and 21come at the corners at-the end 12b of the pan. The third protuberance-22-comes at the end 12a and mid:- way between the corners.
In storing arectangular refrigerator dish, such as here shown, in a refrigerator, the dish is 'generally inserted endwise for the more compact storage and ready accessibility of the dish and other receptacles and objects kept in the refrigerator.
In sliding or lifting the refrigerator dish intov orout of the refrigerator shelf, it is most natural for one to grasp one end of the cover and the associated end of the rim 14 between the thumb and forefinger, placing the other fingers against the end of the pan near the bottom to brace the hold. If the dish is grasped at the end 12b, there is no tendency for the cover to rock about the three supporting protuberances because the down pressure of the cover against the pan is applied along a line passing through two protuberances. If the cover and rim be grasped at the end 12c, there will be a tendency to rock the cover about an axis passing through the protuberance 22 and one of the other protuberances, unless the cover and rim are grasped at'the region of the protuberance 22. But as this comes at the center of the end, and that is the most natural place to grasp it, the probability is the cover will not be rocked. If the three protuberances were placed on a rectangular cover to get the greatest spread as is customary in general in supportingobjects on three feet, two of them would beat the corners on one side and the third would be at the midpoint atv the opposite side. In such position the dish could not be grasped at the middle, or at any other region, of either end intermediate the corners without rocking the cover.
Referring again to Figs. 3 and 4, if the finger pressure is applied to one side of the protuberance 22 and there is a rocking of the cover about an oblique axis passing through the protuberance 22 and the protuberance 20 or'21, the rocking will be limited by the crown of the rim 14 against the valley of the recess 18 at the adjacent corner. This is illustratedin Fig. 4 where pressure has been applied at the corner formed by the side 13d and the end 12a. This rocks the cover about an axis 2525 passing through the protuberances 20 and 22 and in the plane of the crown I of the rim 14. Because, under such circumstances, a normal from the axis 25 to the point of contact between the rim and recess is about onehalf of the length of a normal from the axis to the opposite corner (that is, the corner having the protuberance 21), the latter corner will be elevated substantially twice as far as the diagonally opposite corner is depressed. Since the maximum depression at the corners of the end having the protuberance 22 is the vertical distance between the protuberances and the valley of the recess 18, the maximum elevation of the ther preventing the lateral shifting or rotating of the cover off the rim. If this most distant and most elevated corner of the flange 19 be kept below the crownof the rim 14, there is less tendency for the flange 19, either to ride on to the top of the crown of the rim 14, or having done so, to continue in a shifting and rotating manner to move out of position by riding further on to the crown of the rim. 1
Having thus described my invention. I claim:
1. A refrigerator dish comprising a rectangular pan having an outwardly turned rim in its upper edges and a cover having a downwardly facing peripheral recess for the reception of the lar pan having an outwardly turned rim in its upper edges and a cover having a downwardly facing peripheral'recess for the reception of the rim and three supporting elements intercepting the valley of the recess at less than its depth for engaging the rim, two of the elements being substantially at the corners of one end and the third being on the opposite end intermediate the corners. i
3. A rectangular refrigerator dish comprising a pan having a peripheral rim at its upper edges and a cover having a down turned peripheral flange adapted to embrace the rim and receive it inwardly of the flange and three supporting surfaces formed inwardly of the flange and above its lower edge, the supporting surfaces being adapted to rest upon the rim and hold the cover spaced upwardly from the rim to provide a marginal ventilating gap between the cover and the pan for the passage of air into and out of the dish, two of the three surfaces being disposed adjacent one end of the dish on the respective sides of the vertical longitudinal center plane of the dish and the third being at the opposite end intermediate its corners.
4. A rectangular refrigerator dish comprising a pan having a peripheral rim at its upper edges and a cover :having a downturned peripheral flange adapted to embrace the rim .and receive it inwardly of the flange and three supporting .rim and three rim-engaging supporting elements surfaces formed inwardly of the flange and above its lower edge, the supporting surfaces being adapted to rest upon the rim and hold the cover spaced'upwardly from the rim to provide a marginal ventilating gap between the cover and the pan for'the passage of air into and out of the dish, two of the three surfaces being disposed adjacent one end of the dish on the respective sides of the vertical longitudinal center plane of the dish and the third being at the opposite end intermediate its comers, the surfaces and the flange being so constructed and arranged. as regard their respective depths, that the maximum rocking of the cover about an axis passing between the third said surface and one of the first two surfaces will not elevate the lower edge of the flange above the top of the rim.
5. A rectangular refrigerator dish comprising a pan having an out-turned peripheral rim at its upper edges and a stamped sheet metal cover having its peripheral edge formed in a-shaped cross section to provide an inner peripheral rectangular outwardly facing recess and an outer peripheral rectangular downwardly facing recess therebeyond, the terminal flange of the outer recess extending below the rim and the outer recess being substantially wider than the rim and adapted to receive it, and three cross notches formed in the stock of the outer recess and extending transversely across the valley thereof and extending downwardly from the valley of the HARVEY H. MAAB. I