US1884181A - Dish washing machine - Google Patents

Description

Oct. 25, 1932.

R. PAULY DISH WASHING MACHINE Filed July 18, 1924 3 Sheets-Sheet 1 Oct. 25, 1932. R. PAULY 1,884,181

DISH WASHING MACHINE Filed J ly 18, 1924 ZS-Sheets-Sheet 2 Oct. 25, 1932.

. R P U -Y DISH WASHING MACHINE Filed July 18, 1924 3 Sheets-Sheet 3 Patented Oct. 25, 1932 REMIGIUS rAuLY; or CHIGAGO,

PATENT OFFICE ILLINOIS, ASSIGNOR OI ONE-HALF TO ERIC OSTERBERG,

OI CHICAGO, ILLINOIS msn WASHING monmn Application filed July 18,

My invention relates to dish washing machines, and has to do in general more particularly with the type of machine'useful for household purposes, although of course my invention is not limited in this way.

An object of my invention is to provide a new arrangement of the above character, simple in construction, effective in operation and adapted by reason of an improved Water impelling device to receive the dishes, etc. in a more compact manner, thereby reducing the size of machine necessary for washing a-given amount.

For a better understanding of myinven- 15 tion reference is to be had to the accompanying drawings, in whichig. 1 is a vertical cross section through the main tub, showing the racks, impeller, etc, disposed within the tub;

Fig. 2 is a view along the line 2-2 of Fig. 1, showing an enlarged view of the racks, the left half of Fig. 2 being the lower rack and the right half of Fig. 2 being the upper rack;

Fig. 3 is an enlarged view through the outerring of the lower rack, showing more i1; detail the construction and assembly there- Fig. 4 is a plan view of the impeller; Fig. 5 is a front elevation of Fig. 4; and Fig. 6 is an end view of Fig. 5, this view being the same from either side of Fig. 5. Referring now more in detail to the preferred form of my invention as illustrated herein, it comprises a suitable tub preferably constructed of sheet metal such as a galvanized material, consisting of a side 10 preferably circular and extending into a bottom 11 carrying a flanged nut 12 at its center into which the end of the motor 13 is threaded, so that the motor shaft 14 may extend up into the tub. Suitable legs 15 are provided, and I also show a top .16 adapted to enclose the top of the tub and hinged at 45 17 so that it may be tilted back to permit access to the interior of the tub. A suitable bracket is provided to support the cover when it is swung back off the tub; this bracket. being preferably such as to support the 50 cover in a horizontal position so that it may 1924'. Serial No. 726,770.

be used as a shelf. To this end I provide an arm 18 pivoted to the top at 1 9 and having laterally extending pins 20 slidable in a corresponding groove 21 so that when the cover is lifted the pins 20 slide down in the groove 21 to its bottom to support the cover. The cover is preferably open at its center 22 to permit the escape of air from the tub, but in order to prevent the water from being forced out of the tub this central opening 22 is covered by a plate 23 but open around its outer edge 24.

I preferably wash the dishes by impelling hot soapy water against them, and to this end I provide an impeller as shown in Figs. 4, 5 and 6, adapted to be rotated by the motor shaft. The dishes are preferably circularly disposed around but above the impeller, so that the water is driven against them.

The lower rack A, a plan view of which is shown at the left of Fig. 2, is constructed to receive the plates and to this end I provide a plurality of spring rings 25 suitably secured to the wire rings 2627 of the frame and preferably tangentially disposed and also so inclined as to sli htly tilt the plates 28. Along the outer edge of the rack A I provide a frame to receive additional plates 29, this frame consisting of a plate 30, suitably pierced at 3132 to receive the plates 29 in the slots 32 and also provide openings through which the water is impelled against the sides of the plates.

This ring carries upwardly extending arms 33 supporting the outer ring 34 against which the plates may rest. Plate 30also carries inner arms 35 with a wire ring 36 at its upper end to assist in supporting and properly positioning the plates 28. At the center of the rack A is a circular support 37 adapted to receive a cup 38, preferably constructed of a suitable perforate material such as wire mesh cloth or screen to receive the silverware such as knives, forks, spoons, ctc.,-as shown in Fig. 1. This cup 38 carries a ring 39 to actas a stop-to rest against ring 37 of the central support, the cup being readily removable by lifting it out of its rack.

The entire lower rack A with its silverware rack or cup 38 may be lifted up out $00 of the tub so that these racks may be filled before being placed in the tub and the entire rack and contents again lifted from the tub after washing, so that the dishes and silverware may be readily removed.

Above the lower rack A I support a second rack B in the form of a tray preferably made up of wire screen of a suitable mesh and having a plurality of wire rings so disposed as to provide a support for cups and similar dishes, which may be tilted as shown in Fig. 1. By thus tilting them the surplus water from washing more readily drips off and the dishes will dry more rapidly.

These wire dish supporting rings shown in Figs. 1 and 2 include an outer ring 40 and an inner ring 41, the latter being lower than the outer ring so as to afford a more varied supporting arrangement for the different sized cups, bowls, etc. This tray B 1s supported by brackets 42 which are attached to an outer ring 43 adapted to rest upon the inturned flange 44, preferably pressed inwardly from the wall of the tub. Thus this upper tray B may be readily lifted from the tub and re-inserted.

Now as to the impeller, this is preferably made up of a plurality of arms or blades, preferably two, and oppositely disposed, these blades consisting of sheet metal members 45- and 46 suitably secured to the hub 47. These blades are preferably shaped in the manner indicated in Figs. 4, 5 and 6, which when the impeller is rotated in the direction of the arrow indicated on Fig. 4, will impel the water in the bottom of the tub upwardly into contact with the dishes. Also the shape of these blades is preferably such that the water is thrown upwardly and outwardly obliquely to the perpendicular in the nature of a tangential fan-like spray; that is, so that the water will be thrown up between the plates when positioned in the manner indicated in Fig. 2, striking both sides of the plates and passing up between the plates against the dishes in the upper tray. Also .the impeller forces the water up through the central basket 38 to wash the silverware disposed therein.

In order to secure the action of the water as explained above I preferably shape the impeller blades upon the hub 47 so that the lower portion of each blade has a horizontal lower portion of substantial radial length as indicated in the drawings, the blade then continuing circularly around the hub and gradually curving upwardly, as shown more clearly in Fig. 6. This gradually upwardly curving portion extends tangentially from the hub in a straight plane continuing upwardly so that the portions appearing where the reference lines for numerals 4546 terminate, lie in a substantially straight vertical plane. By thus disposing these blades 1 get the peculiar action of the water described above so that this Water is not only thrown upwardwhen placed in the lower tray During the rotation of the impeller through the water the action is such as to tend to force it downwardly. In order to take the strain off the motor shaft and bearing from this downward thrust, I insert a suitable ball thrust bearing 48 resting between the end of the motor shaft bearing sleeve 49 and an inner shoulder 50 of the impeller hub 47.

To prevent too great a shock or strain from the sudden starting of the motor I preferably provide a yielding connection between the motor shaft 14 and impeller, and to this end insert a coil spring 51 of a suitable number of turns with one end connected to the motor shaft 14 and the other end to the impeller hub 47. Thus, as the motor is started this spring 51 is adapted to wind up, the lmpeller slowly starting and gradually increasing in speed as the tension of the spring increases from the winding.

In the use of the machine I preferably place suflicient hot soapy water in the lower part of the tub, the water being sufliciently high on the impeller blades to secure the proper washing effect and depending upon the condition of the dishes. Also more water is used when dishes are placed in the upper tray B than only. With the trays substantially filled with dishes the water comes almost to the top of the impeller blades. The motor is then started and after the dishes are thoroughly washed the motor is stopped and the water drained from the tub by opening the hand valve 53 shown in The water on the dishes then is allowed to drip off and the dishes dry in a short time, having become heatedfrom the hot water impelled against them. If desired, plain hot water may then be put into the tub and the same operation gone through to rinse the dishes, after which this water is drained and the dishes permitted to dry.

lVhat I claim and desire to secure by United States Letters Patent is:

1. In a dish washing machine, a tub, an impeller located centrally near the bottom of the tub, said impeller having a spiral blade of increasing pitch toward its upper end, a rack portion surrounding said impeller for supporting plates at angles between tangents and radii of a circle concentric tothe impeller,and slightly inclined vertically, and a second rack portion surrounting the first rack portion for supporting plates at larger angles with respect to the radii of a circle concentric to the impeller.

2. In a dish washing machine, a tub, a rack substantially concentrically disposed therein,

said rack having means for supporting plates at angles between tangents and radii of a circle concentric to the tub, said rack having further means for supporting plates at larger angles with respect to the radii of a circle concentric to the tub, and a cooperating impeller for moving water substantialy radially outward and upward in the lower portion of the tu i 3. In a dish washing machine, a tub, an impeller in the hub having blades for moving water substantially radially outward and upward, a rack portion surrounding the impellerhaving means for supporting dishes in a position to be impinged on by said water and to deflect said water outwardly, a second rack portion surrounding the first rack portion and having means to support dishes in a position at angles between the tangents and radii of a circle concentric to the impeller to intercept said outwardly deflected water. 1

In witness whereof, I hereunto subscribe my name this 1st dig of July, 1924.

EMIGIUS PAULY.

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