US2284026A

US2284026A - Dishwasher

Info

Publication number: US2284026A
Application number: US226611A
Authority: US
Inventors: Stockham Gordon Ellis
Original assignee: PIQUA PRODUCTS Inc
Current assignee: PIQUA PRODUCTS Inc
Priority date: 1938-08-25
Filing date: 1938-08-25
Publication date: 1942-05-26
Anticipated expiration: 1959-05-26

Description

May 26, 1942. G. E. swcknm DISHWASHER Filed Aug. 25, 1938 4 Sheets-Sheet l INVENTOR J 6.

7% m ATTORNEYS M y26, 1942. E STQCKHAMI 2,284,026

- DISHWASHER Filed Aug. 25, 1938 4 Sheets-Sheet 2 5%. 5 lNVlgOR 5Y 7 fun ATTORNEYS y 1942 G. E. STOCKHAM 2,284,026

DISHWASHER Filed Aug. 25, 1938 4 Sheets-Sheet 3 INVENTOR zZzn-a stsail BY 9 7X04.

Af'roRNEYs y 1942. G; E. S'TOCKHAM I r 2,284,026

7 DISHWASHER Filed Aug. 25, 1938 4 Sheets-Sheet 4 81 as at 2 g L J H a2 a4- fi/C INVENTOR Patented May 26, 1942 FFI-CE DISHWASHER GordonfEllis Stockham, Piqua, Ohio, assignor t0 Piqua Products, Incorporated, Piqua, Ohio, a

corporation of Ohio Application August 25, 1938, Serial No. 226,611 I 19 Claims. (01114141) This invention relates to washing machines and more particularly to machines for washing dishes and the like.

It is a principal object of the invention to provide a dishwasher which is relatively small, compact, and light in weight, adapted to be removably placed on a kitchen sink and which functions in a highly eflectivemanner to thoroughly and rapidly wash and rinse the dishes-normally required by a family.

It is afurther object to provide a washer in which the articles may be thoroughly rinsed and completely cleaned with a minimum usage of washing fluid which is recirculated, while food particles removed from thedishes are continuously collected and removed from the path of circulation.

It is a further object to provide a washer of this character in which the washing is effected through the use of finely divided sprays of high velocity and low mass which thorougly permeate the entire washing zone and provide for cleansing the dishes while avoiding any damage thereto.

It is a still further object to provide a rack structure for use in such a washer adapted to hold the dishes or other articles to be'washed in coordinated positioning with the washing sprays. to secure eiiicient use of the space and effective cleansing of all of the dishes.

It is a further object to provide a washing device having a container and a removable cover and having a high speed Washing element adapted to project washing sprays at high vepresent invention mounted in convenient location upon a kitchen sink, the cover being shown partly raised; 4

Fig. 2 is a plan view looking into the washer with the rack and the cover removed, certain of the-parts being broken away to moreclearly show the construction;

Fig. 3 is a vertical sectional view on the line 3-3 of Fig. 2

Fig. 4 is a cross sectional view through the washer on the line 4-4 of Fig. 3, with the rack. in place in the container, certain parts being bro-- ken away;

Fig. 5 is a detail end elevational view of one of the impeller means;

Fig. 6 is a detailside .elevational view of the impeller;

Fig. '7 is a detail sectional view through the discharge outlet on the line 1-1 of Fig. 2;

Fig. 8 is a detail sectional view showing the fresh water inlet, taken on the line 88 of Fig. 2; i Fig. 9 is a plan view of a rack constructed in accordance with the present invention; and

Fig. 10 is a view showing the construction of the interlock means for the control of the motor in accordance with the position of the cover.

Referring to the drawings which illustrate a preferred embodiment of the invention, there is shown -a generally rectangular container I 0 which may be suitably formed of sheet metal drawn and pressed into the desired shape as illustrated; The container is providedwith a fixed support ll extending across one end, and

is formed adjacent the other end with a pair of legs l2 within which are adjustably mounted the friction feet l3 which are adjustable as to height in order to secure the proper, position of that end of the container with respect to the other, to secure proper drainage therefrom in use. As shown in. Fig. 4, the container wall is preferably formed with a. lowermost centrally located lon: gitudinally extending portion l4 and with sloping portions l5 which connect such lowermost portion with the side wall portions IS.

'The cover I8 is pivotally attached to the upper portion of the side walls ofthe' main body of at one end of the container.

the container by a pair of hinges l9 positioned The upper edge of the side wall portions I6 is outwardly flanged as shown at 20 around its entire periphery, and the lower edge of the cover is provided with a downwardly turned flange 2| forming with the body of the cover a recess for receiving a flexible sealing member 22, such as a rubber strip or thelike, adapted to provide a substantially water-tight connection with flange '20. the flange 2| at the hinged side of the cover is of such extent'thatwhen the cover is raised, it will overlie the adjacent flange '20, and hence any liquid which drains therefrom will -fall inside the container and not on the outside thereof. A suitable handle-23 is positioned upon the open side of the cover to .provide for raising and lowering the same, and additional handles 24 Further as shown to increase the strength and rigidity.

thereof.

In order to provide for securely locking the cover upon the container body, handle 23 is rotatably mounted in the cover and upon its inher end carries a locking disk 26 having an The impeller shaft 30 is supported from this bafiie member, and for this purpose the baffle member is formed adjacent the outlet end of thecontainer with an upwardly projecting integral arm 44 in which the end of the impeller shaft is suitably journalled. If desired the arm-' the arm 44 of such strength and cross sectional I area that it will adequately support the shaft eccentric slot 21 therein which in one position of the handle will interflt with a projecting tongue 28 fastened to the inner side of the main body of the container. Upon lowering the cover into closed position, and rotating handle 23, the slotted portion of the disk 26 engages tongue .18, and provides for camming the cover downinto. a locking position where it is securely retained upon the body and held in substantially sealed relation with respect thereto.

.To provide for distributing the washing fluid into and upon the articles within the container.

a rotary impeller shaft III is positioned in the lower part of the container and extends generally longitudinally thereof, and substantially throughout the entire length of the container. This shaft carries a plurality of spaced impellers, indicated generally by the reference character 3|, which are adapted to pick up washing fluid from the bottom of the container and to discharge the same upwardly throughout the interior of the container. For ease of manufacture and improved character of operation, the entire drive unit is preferably supported so that it can be constructed as a unit, and installed in the container without the necessity for precise positioning with respect to the container body itself. Thus minor manufacturing variations which occur in the formation of the sheet metal containers are not objectionable. from the standpoint of securing proper operation of the drive mechanism.

The shaft 30 is supported from a bailie member 34 which also extends substantially throughout the lower portion of the container. This baille member is bolted to the portion l4 of the container by means of a series of bolts 35, and is preferably provided at one side with a thin edge 36, which edge projects substantially into the 1 plane of the vertical axis of shaft 30. The main portion of the baiiie' member lies to one side of without contact with the end wall of the container, preferably leaving a space 43 therebetween for discharge of washing fluid around the end of the baiiie member. An integral upwardly extending arm 42 supports the shaft intermediate the ends thereof. At the opposite end of the container, the baffie member 34 is formed with an integral upwardly extending arm or plate 45 which is adapted to lie against the inner wall of the end of retain both the bearing'plate and the bracket the shaft axis, and the face 31 thereof is curved as shown about a center substantially coinciding with the axis of shaft 30. ,The opposite side 38 of the baille member is substantially higher than edge 36, and is provided along its top portion with a series of notched portions 39 leavingspaced projections 40 extending above the main body of the baffle member. The projections 40 may be generally triangular in cross section, as I securely in assembled position. Preferably a gasket it of rubber or suitable-compositionmaterial, is included between plate-4l'and the wall of the container. Bracket 48 is formed with an axially extending-sleeve portion "which is--centered in desired location by fitting into a finished opening in plate 45, such opening having been previously formed in alignment with the bearing support 42 by a machining operation performed upon the baffle member prior to its assembly into the container. The sleeve 5| receives the bearing member 52 for journalling the-shaft. packing seal 53 being provided for preventing leakage of the washing fluid along the shaft and into the hearing. A motor casing 54 encloses the motor, and is formed with a projecting part 55 for iournalling' the shaft end 46. The stator 56 of the motor is mounted directly in the casing 54, and bolts 51 extend through plate 48 and bracket 45 to retain the casing upon the container and to secure the bearing brackets in assembled position. A suitable motor control switch 58 is provided for controlling the operation of the motor.

As will be apparent from the foregoing, upon removal of bolts 51 the motor casing may be removed, including the stator part of the motor. Thereafter removal of bolts 49 will permit the bracket .45 to be separated from the plate 4!, and upon withdrawal of bolts 35, the baille member may be loosened from the lower portion of the container. It is then a simple matter to withdraw the shaft 30 axially from its inner hearing, the impellers being slipped along the shaft, the entire drive assembly thus being readily removable from its operative position. Also it will be understood that the baffle member 34 with its

respective arms

42, 44 and 45 provides definitely for locating the bearings for the shaft and since this baille member can be conveniently formed with the openings in its respective arms in proper blades 62.

alignment assurance is provided that the bearing for the shaft will also be and remain in alignment, irrespective of minor manufacturing variations in the walls of the container.

It is desired to operate the impeller shaft at a relatively high speed in order to secure proper' distribution of the washing fluid,'and for this purpose the motor, is directly connected to the drive shaft so that the shaft will operate at the same speed as the motor. A suitable motor for use in .'the present invention is one having a starting winding which is dephased by the use of a condenser, such motor having been found to produce the necessary torque at proper operating speeds, tosatisfactorily operate the impeller shaft. l

The impeller is suitably formed as shown in a Figs. 5 and 6 with a plurality ofblades to proshort radius, and an inner convex part 65 of rela- -tively longer radius of curvature. These blades tend to discharge the washing fluid picked up on the surface thereof relatively readily, that relatively sooner in the course of rotation so that these blades have more tendency to discharge the washing fluid in that portion of the container which is in line with the blades in their upwardly moving course. i The direction of rotation of the blades is clockwise as shown in Figs. 4 and 6,

g and these blades 62 tend to discharge a greater portion of liquid thereon into the container area which lies to the left of the axis throughthe shaft.

Blades 83 are relatively more closed, and have a concave surface of relatively long radius of curvature, these blades tending to retain washing fluid for a longer period of time than the to discharge a greater portion of the fluid picked up thereby into that portion of the container which is in line with the blades on their downwardly moving course and which lies to the right of the center axis as shown in Fig. 4. The

spray produced by each blade also 'has a tendency to fan out so that adjacent sprays overlap and cover the entire longitudinal extent of the container. The conjoint eflect of this composite blade structure therefore is to provide a substantially uniform distribution of washing fluid into and throughout the entire interior of the container.

Hence in operation these blades'tend' relatively small quantity of washing fiuid which distributes itself as a thin film over the surface. Moving upwardly this film is retained on the surface of the blades, and does not tend to move off radially by reason of the close positioning of baflle member 34. Fluid may also be supplied to the blades in a generally axial direction by means of notches 39 which are formed intermediate the blades 3|. The notches being below the normal liquid level in the container, liquid may flow through the notches between the spaced projections 40, and thence in a generally axial manner toward the surfaces of the blades. The projec tions '40,. lying in radial alignment with the blades, tend to prevent the direct flow of fluid onto the blades, it having been found that where such direct flow took place the discharging action of the blades was interfered with and the most satisfactory. discharge and distribution of the washing fluid wasnot secured. Also theblades are preferably not all mounted in the same-angular position upon shaft 30, being mounted in staggered relation with for example adjacent blades rotated. 90 with respect to each other so as to secure more uniformity in load upon the motor and in the discharge characteristics of the impeller. I

In accordance with the present invention the blades are operated at high speed, and onlya limited quantity of washing fluidis supplied to the surface of the blades so that each blade provides' for discharging this thin film of fluid in a spray travelling'at relatively high velocity but having only low mass. This results in discharging the washing fluid in a spray having extremely high penetrating power, which substantially completely fills the entire interior of the container, so that articles positioned at any point therein are subjected to this spray travelling at high velocity and having high washing power.

However the spray is in very finely divided condition, and does not have .such mass to cause damage to even fragile glassware positioned in its direct range of operation. For example a thin tumbler may be located in inverted position directly. over the spray, and is not lifted from It will also be noted that the extreme radius of each of the sets of

impeller blades

62 and 63 is substantially the same, and that these blades are made to approach relatively closely to the armate surface 31 of the baflle member 34. Baiiie member 34 thus acts to control and limit the introduction of the washing fluid onto thesurfaces of the impeller blades. While the washing fluid is free to flow into the path of the impeller blades at the downwardly moving side thereof, its passage into the blades is definitely restricted on the upwardly moving side of the blades by the baflle member. Rotating at high speed, the blades tend to cavitatethe washing fluid on the downwardly moving side, picking up on their surfaces only a its supported position under the action of rapidly moving sprays.

Very satisfactory results have been secured using impellers as shown having a radius of two inches to the outer tip of theblade, and travelling at approximately 3200 to 360GB. P. M., the impeller under such condition delivering the dethese sired finely divided sprays of high velocity and of low mass. I

To protect the operating parts against possible damage, there is preferably provided a guard plate 10 adapted to overlie the impeller shaft 30 and the impellers 3| thereon; This guard plate is curved in a semi-circular manner, and is adapted to be supported by flxed brackets II fastened to the inner end walls of the con-- tainer .in position where the arcuate surface thereof lies just above the peripher of the impellers. The guard plate) is formed with cut-out portions I! in alignment with the several im-.

pellers 3| so as not. to interfere with the dischargeofthe washing fluid by such impellers. Thus the openings 12 extendodown at each' side of the guard to a point such as shown at 13 which is below the range of operation of sprays which are effective upon the articles within the contalner,'so that no interference with the .op-

eratlon of the device is occasioned by the use of the guard plate. Itdoes however extend above the impellers and functions effectively to prevent accidental contact with a dish, or'an article of cutlery should such for examplevfall into j such as usually found in the ordinary kitchen,

and for this purpose, it is arranged to receive and discharge all'of the washing and rinsing fluid from" one endof the container. As shown in Fig. 1, the container is adapted to rest upon 18 by means .of a. flexible hose 11, and to dismanently open and protected outlet from fthe container, above the normal liquidlevel.

prises a generally rectangularly shaped opening ofsubstantial cross sectional area, extending upwardly through passage Ill. The wall "to! the the sink 15,.to receive fresh water from a tap charge its washing fluid into the drain portion 18 of the sink. For this purpose the container is provided with a discharge outlet 88 at the discharge end of the machine, the outlet communicating with the lowermost portion ll of the container, and the adjustable feet i3 being so regulated as to provide a downward slope toward the outlet. A casing member 8| is posi- *tioned over the outlet and is. provided with a valve actuating handle 82. The valve member 83 is positioned for rotation upon the inner end of handle 82, and preferably carries a gasket 84 ofsuitable material for establishing a fluidtight seal. A pin '85 fastened in casing 8| serves to permit axial movement of valve plate 83 while preventing rotation thereof. A-cam surface 86 is fastened to theinner face of the casing 8|,

and is adapted to cooperate with a projection 81 a formed on shaft 82, the casing 8| being suitably apertured to receive such projection. In order to close the'valve'; the handle is moved to the dotted line position and then pushed axially toward its seat and also rotated. Upon rotation g the projection 81 moves over the cam surface 88 causing the pressing of the valve plate 83 firm-' ly into closed position. The valve opens freely as shown inthe dotted line position in Fig. '1 to provide for complete and rapid discharge of the fluid contents of the container when ,desired. 1

In order to properly control the depth of washing fluid at all times within the container, and

to provide a predetermined depth for operating.

purposes, an overflow outlet 88 is provided also at the discharge end of the container. This overflow comprises an inlet opening 8| and a plate 82 which serves to control the actual height to which fluid may rise within the container.- Opening 8| communicates with a downward discharge opening 83 which continues through the permanently opened discharge 88 to provide for discharge of the fluid when it rises above the level of the plate 82. It will be noted that the maximum height to which thee-fluid can rise is somewhat above the notched portion 38 of the baflle member, but not substantially, above the top poring sprays under the high velocity discharging action of the impellers, tends to rapidly heat such air and to-cause the production of an ex- 7 cessive air pressure within the container. Ac-

"cordingly in order to relieve such air pressure there is provided a breather comprising a perbreather is preferably curved so as to avoid the .formation of pockets which would cause the desuch washing fluid as tends to enter the breather opening; however in certaincases where for example an excessive quantity of soap is utilized, some of the soapy washing fluid may be discharged through the breather opening, and in this case it will be at the discharge end of the machine and in direct position to pass into the drain part of the sink. i

As described above, the fresh water. supply for the washer is delivered through a flexible con-. nection 'I'I which is preferably formed with a bayonet attachment to be received upon .a cooperating socket H8, which opens through the lower portion of the wall of casing 8 I. The socket Hll leads'through a tube H| suitably bolted by means of bolts H2 to the lower portion of the 1 container, to a position directly beneath the baflie member 34. The baflie member is suitably apertured asshown at 3, and an aligning opening is formed in the lower wall of the container to provide for the flow of water from the flexible hose connection 11 into the passage III. This passage, H3 extends through baflie member 33 from the discharge end thereof to the remote end where a cross passage H4 is provided with an opening 5 upon the impeller side of the bane member, and an opening H8 upon the opposite side thereof. These openings preferably are arranged at an angle pointing in the general direc tion of the discharge outlet to cause improved flushing of the food particles from the floor of the container toward such outlet.

In operation, the flexible connection is attached to the tap, and hot'water supplied through the connection and through passage H3 for discharge into the body of the container through the several openings as described. In the normal operation, it is desired tchplace the articles to be washed within the container and to then run the washing fluid thereinto with the motor not operating until the water runs out of the overflow opening showingthat the proper depth of water has been established. A limited quantity of a soap material, such as soap flakes is added to the hot water, a relatively small quantity having been found adequate to produce the desired washing suds, and a larger quantity to cause the production of a heavy and persistent foam, under I the actiom of the rapidly moving impellers. 4 Thereafter the motor is started and the washing operation takes place, actually requiring only a relatively short time, of. the order of a few minutes. During such washing operation the baiiie member 34 forms a relatively quiescent pool of washing liquidbetween itself and the adjacent portions l4 and I5 of the container wall, on the side 38 remote from the impeller blades. This pool is kept at a predetermined level by reason of the notches 39, which provide for'flow into the impellers when the level in the'pool exceeds a predetermined amount, but which assures the maintenance of this definite pool of washing fluid. Being relatively quiescent as compared with the remainder of the body of washing fluid, food particles and the like tend to collect in this pool and to precipitate downwardly to the bottom of the container, in back of this bafie member. In

- actual operation, it is found thatwhere the articles being washedgcontain food particlesthey will be deposited very largely in this area beand preferably mountedat an angle are pro-. videdrods. I28- forming a support for receiving tumblers and the like, which may be placed with their open endsfacing downwardly and at an angle suitable to cause the proper application of the washing sprays thereto. Generally above space I26 is a pivoted rod member- I30 which may be moved from its operative position as shown in Fig. ya to an open position on the opposite side of its pivotsupport I'3 I, to provide access to space -I26. After being loaded, the rod I36 is moved into. its operative position where it pro-- vides a support for receiving cups and the like tween the baffle and the wall of the container, 50'

that they are not continually recirculated, but

are in effect progressively withdrawn from circulation with the result that inoperation the device tends to become self-cleaning.

which are also mounted generally downwardly and at a suitable angle. The rack thus provides for receiving the normal supply of dishes for a At the end of the washing operation, the discharge gate or valve is opened, and the washing fluid together with the greater portion of the entrained particles, is drained outwardly. At this time, fresh washing fluid may be introduced into the container, and in that case the passages H5 and H6 provide for direct introduction of washing fluid on both sides of'the bailie member to the innermost portion of the container, so as to effectively flush all such food particles toward and out of the drain.

After such action has taken place the discharge valve may be againclosed and the container filled up to the desired level with fresh rinsing water. The impeller is again placed in operation to causesimilar. discharge of finely divided rinsing sprays into and upon the articles resulting in the washing and rinsing thereof free of remaining particles offood material, and entirely free of any adhering or residual film or deposit. Upon the final draining of the rinse water both the dishes themselves as well as the household, and for supporting the same in'compact relation and in position to be acted upon.

effectively by the washing sprays.

In order to avoid possible accidental operation of the washing sprays when the cover is in raised 4 position, with consequent discharge of the washing sprays into the kitchen, means are provided to interlock the drive motor with the position of the cover so as to permit operation of the drive motor only when the cover is in its closed and locked position. This means comprises switch box I mounted upon the container adjacent the upper edge thereof, and generally in aligninterior of the container are in a washed and ,the washing sprays, is preferably made removable, being formed with foot portions I26 adapted to rest upon the sloping wall portions I5 of the container, and being formed with a series of upwardly extending rack members I2I spaced apart to provide a series of stepped slots for receiving plates, saucers, and the like atone side of the rack. I'huseachsuccessive step on the plate provides for picking up and discharging over the surface of the plate held therein separate portions of the spray so that. each one of the entire series of plates is effectively sprayed and cleansed.

On the opposite side of the rack a longitudinally extending rod I22 is spaced from rod I23 to provide a space l24 for the reception of large dishes and the like, which are adapted to stand in position with their open faces toward the impeller shaft. Similarly rods I25 are spaced from rods I23 to form space I26 for the additional reception of dishes of relatively large size. Centrally of the rack there is provided a circular grid-work I2'I which is adapted to receive cutlery, which may be stood on end in the pocket formed thereby. At each side of. the grid I21,

ment with rotatable handle 23 mounted onthe cover. Handle 23 carries an operating pin I36, and the switch box I35 is formed witha cut-out opening I31 through which the pin I36 is adaptedto project when the cover is in lowered position and the handle 23 turned to cause the locking thereof in such position. Within the switch box there is positioned a fixed contact I38 and a movable pivotally mounted contact I39, resilient means I40 tending to normally retam said contacts. in open circuit position. Upon contact with pin I36, movable contact I39 is depressed and caused to close the circuit with contact I38, and in this position the motor is subject to the control of the operator by operation of switch 58 but the provision of the interlocking device prevents actuation of the impeller with the cover raised. The connection to this inter-lock switch is preferably made through the interior of the container, a tube I being fastened to the interior of the container and passing through an opening therein in suitably soldered or welded relation to avoid escape of washing fluid 'therethrough. V

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made thereinwithout departing from the scope of the invention which is defined in the appended'claims.

What is claimed is l. A washing device of the character described which comprises a container adapted to receive a quantity of washing fluid, a shaft extending along the lower portion of said container, a plurality of spaced impellers mounted on said shaft, spaced baflie means adjacent and in corresponding alignment with the periphery of said impel lers on the upwardly moving side thereof and limiting the supplying of washing fluid to the impellers in a radial direction from the discharge side thereof while providing for supply of fluid from between adjacent blades, and'mea'ns for rotating said shaft and said impellers at high speed to distribute the water into and throughout the substantially in radialalignment therewith, the

2,294,026 interior of the container in a finely divided spray described which comprises a container for holding a quantity of.washing, fluid, a shaft located in the lower portion of. said container and extending longitudinally and outwardly through one end thereof, a plurality of blades mounted on said shaft adapted to dip into the washing fluid, ba'flle means contin'uousalong and resting. in

fluid blocking relation upon the lower wall of said spaces between said baille means providing for controlled feeding of washing fluid toward the I surface of the impellers in a generally. axial direction to form a thin fllm of fluid thereon, and means for rotating said-shaft and said impellers at high speed to discharge said thin films of water thereon upwardly into the space within said container in a finely divided spray travelling at high velocity, said'baflie means preventing flow of said washing fluid radially into said blades on said upwardly moving side.

' 3. A dish washing machine of the character described comprising a container for holding a quantityof washing fluid, a shaft extending substantially throughout the length of said container, a plurality of spaced blades mounted on said shaft'adapted to dip into\ the body of washing fluid, baflie means along the lower portion of said container cooperating with the individual blades on the upwardly moving side thereof to feed the fluid into the blades from between adjacent pairs thereof, said baille means'forming between itself and the wall of the container a relatively quiescent pool of washing fluid adapted to cause the collection and precipitation of sus- H pended particles, andmeans for rapidly rotating said shaft and said blades to cause the discharge of said washing fluid into the interior of said container in a finely divided spray of low M mass and-high velocity;

4. A dish washing machine of the character described which comprises a container for holding a quantity of'.washing fluid, a-shaft located in the lower portion of said container and extending longitudinally thereof, a plurality of blades mounted on said shaft adapted to dip into the washing fluid, baiiie means on the bottom of I said container in corresponding location to the blades on the discharge side' thereof to avoid direct back-flow of liquid into the blades while providing for flow therebetween and forming a pool at one side of said shaft, said baffle means being formed to provide a bearing support for said shaft, and means for rapidly rotating said shaftand blades thereon to cause the discharge of saidgwashing fluid into the interior of said container in a finely divided spray.

5. A dish washing machine of" the character described which comprises a container for holding a quantity of washing fluid, a shaft located in the lower portion of said container. and extending longitudinally thereof, a plurality of blades mounted onsaid shaft adaptedto dip into the washing fluid, spaced baille means on the discharge side of said blades for individually preventing directback-flow intothe blades on the discharge. side thereof, the spacing of' said baiile means corresponding to that of said blades; and said means providing for feeding washing fluid substantially axially toward said blades from be-' container forming a pool at one side of said shaft between itself and the wall of said container adapted to cause thecollection and precipitation of suspended particles in. the washing fluid, said baffle-means at one end providing a support for journalling said shaft, and also being provided with a curved surface beneath said shaft arranged in close peripheral relation with respect to said blades to control and limit the fluid carried by each blade, and means for rapidly rotating'said shaft and said blades to cause the discharge of said washing fluid upwardly into said container in a finely divided spray. 7. A 'dishwasherof the character described which comprises a closed container for receiving a quantity of heated washing fluid, rotary impeller means within said container for discharging said fluid in. a finely dividedspray of high velocity into and throughout the interior of said container, said spray being adapted to quickly heat and expand the enclosed body of air within the container, a discharge outlet .formedin the lower portion of a vertical wall of said container. a housing over the outlet to provide for downward discharge of fluid therefrom, a permanently open breather outlet of substantial area located in a protected position in said vertical wall, said breather opening into said housing to provide for discharge of fluid therethrough in said downward direction, and means for substantially preventing escape of washing fluid through said breather outlet.

' 8. A .dish washer of the character described whichcomprises a closed container for receiving a quantity of heated washing fluid, rotary impeller means within said container for discharging said fluid in a-flnely divided spray of high operation of the impeller, a wall extending upwardly and outwardly from the lower side of said opening to prevent the discharge of washing fluid through said breather opening while providing for free flow of air therethrough, and an outer housing closed at its upper end adjacentsaid container wall and spaced from. and overlying said upwardly extending wall, said housing being open at its lower end to provide for the discharge of the air therethrough.

tween adjacent pairs of blades, and meansfor Y rapidly rotating said shaft and said paddles to cause discharge of the washing fluid upwardly .into the container in a finely divided spray.

6. A dish washing machine of the character 9. A dish washer of the character described which comprises a container, a shaft extending longitudinally of said container and located in a position adjacent the bottom of said container, means within said container for journalling said shaft, said shaft having an and extending through said container, drive means mounted directly on the end of said shaft, a drain outlet adjacent the. opposite end of said container, a valve for controlling said drain outlet, an overflow outlet adjacent said drain'outlet for predetermining the maximum depth to which the container "may be filled, a breather outlet also located at the end of said container adjacent said drain and overflow outlets, and acommon discharge member through which all of said outlets discharge.

10. A dish washer of the character *described comprising a container, a shaft extending longitudinally of said. container, a plurality of impellerblades on said shaft, bafiie means for controlling the supplying of washing fluid into said impeller blades, outlet means adjacent one end of said container, and means for introducing fresh washing and rinsing fluid into said container on both sides of said baffle means at the end thereof remote from the outlet means to facilitate the flushing of food and out I said outlet.

11. A dish washer ofthe character described.

particles toward 7 in. A 'dish washer of. the characterxdescribed :comprising a container adapted to receive a (quantity of washing fluid, a shaft extending longitudinally continuously from adjacent one end of the 'containerthrough the opposite wall I thereof, a plurality of impeller 'blades mounted on said shaft, meansfor mounting said shaft independently of the; wall portions of the con- .tainer and for separate assembly and removal comprising a container, a longitudinally exof said container to provide for collection of food particles therein, a discharge outlet adjacent one end of said container, and means for introducing fresh washingand rinsing fluid intosaid pool adjacent the .end remote from said outlet to facilitate the flushing of food partieies toward and out said outlet.

12. A dish washer of the character described comprising a container, a longitudinally extending shaft, a plurality of impeller blades on said shaft, bafile mearis for controlling the supplying of washing fluid into the impeller blades, said baffle means forming a pool with the 'wall of said container to\ provide for collection of food particles therein, a discharge outlet adjacent one end of said container, and means for introi ducing fresh washing and rinsing water on both sides of said baflie means'adiacent the end of the container remote from said outlet to facilitate the flushing of the said food particles to ward and out said outlet.

13. ;A=dish washer of the character described comprising a container, a shaft extending lon-' gitudinallyof said container, a plurality of im peller blades on saidshaft, baflle means for controlling the supplying of washing fluid-into said impeller blades, outlet means adjacent one end of said container, means including a passage formed through said baflie means for introducing fresh washing and rinsing fluid into' said con- .tainer adjacent the opposite end to facilitate the flushing of food particles toward and out said outlet, and a connection at the' end-of the container having the discharge outlet for supplying fresh water to said passage.

14. A dish washer of the character described comprising a container adapted to receive a' quantity of washing fluid, a shaft extending longitudinally of said container, a plurality of impeller blades mounted on said shaft, baflie the container through the opposite wall thereof, a bearing for the inner end of said shaft supported from said baiile means, a' bearing for journalling the portion, of said shaft extending through said opposite wall, and means on said baflle means and within said container'for locating said last rnentioned bearing in predetermined alignment with said first mentioned bearing. 4

from thecontainer comprising a member supported from the lower portion of said container and having spaced-upwardly projecting arms,

a bearing positioned withinone' of said arms providing for'joui'nalling said one end of said shaft, a second bearing for journalling the por tion of said shaft which projects through said. opposite wall, means including the other of said arms for supporting said second bearing upon the wall of said container in predetermined alignment 'with the first mentioned bearing, and motor drive means for rotating said shaft directly mounted upon the portion of said shaft projecting-outwardly of said container from said second bearing member.

16.. A dishwasher of the character described comprising a container adapted to receiver. quantity of washing fluid, a shaft extending longitudinally thereof, a plurality of impellers mounted on said shaft, said impellers dipping within the washing fluid and providing for receiving a. film thereof uponthe surface, each of said impellers having a hub, portion and hav;

ing a convexly curved surface extending substantially radially from which thewashing fluid is readily discharged-to providefor discharge of said film of washing fluid taking place upwardly primarily into the space within said container which lies on the upwardlymoving side of the axis of said shaft, and each of said impellers having another surface with aconcave curvature projecting forwardly substantially beyond a radial position and forming with said hub a pocket from which the washing fluid is less readily discharged-to provide for delivery of the film of washing fluid thereon primarily into that portion of the container above said shaft-on the downwardly moving side thereof, and means for rapidly rotating said shaft to cause discharge of a finely divided spray throughout the interior of said container.

17. A dishwasher of the character described comprising a container adapted to receive a quantity of washing fluid, a shaft extending longitudinally thereof, a plurality of impellers mounted on said shaft, said impellers dipping within the washing fluid and providing for receiving a film'thereof upon the surface, each of said impellers having a hub portion for mounting on said shaft and having a plurality of altemating'faces thereon, one of; said faces extending outwardly from the outer portion of said hub with a forward curvature in the direction of rotation such that the outer portionof said face projects in advance of a radial plane midway between the points of attachment to the hub of that face and the next preceding face, to provide delayed discharge of the washing fluid therefrom anddelivery thereof primarily into that portion of the container above said shaft on the downwardly movingside thereof, and the other faces on said hub extending substantially radially therefrom to provide for more immediate discharge of fluid therefrom and primarily into the portion of the container which lies above the upwardly moving side of the shaft, and means for rapidly rotating said shaft is cause discharge of a flnely divided spray of said washingfluid throughout the interior of said container. .e

18. A dishwasher of the character described comprising a container adapted to receive a quantity of washing fluid, a shaft extending Ion-- gitudinally thereof, a plurality of impellers mounted on saidshaft, said impellers dipping within the washing fluid and providing-for receiving a film thereof upon the surface, each of said impellers having a hub portion for mounting on said shaft and having a face thereon extending outwardly from the outer portion of said hub substantially tangential thereto with a curvature in the direction of rotation, the outer end of said face projectingforwardly beyond the axis of the shaft and located substantially in the plane normal to the radius through the'point of tangency to provide delayed discharge of the washing fluid therefrom and delivery thereof primarily into that portion of the container above said shaft on the downwardly moving side thereof, and another face on said hub extending substantially radially therefrom to provide for more immediate discharge of fluid therefrom and primarily into the portion of the container which lies above the upwardly moving side of the shaft, and means for ra'pldly rotating said shaft tocause discharge ofa'flnely divided spray of said washing fluid throughout the interior of said container.

19.1 dishwasher of the character described comprising a container adapted to receive a quantity of washing fluid, a shaft extending longitudinally thereof, a plurality of impellers on said shaft, said impellers dipping within the washing fluid and providing for receiving a film Q thereof upon the surface, each of said impellers having a hub portion for mounting on said shaft and having a face thereon extending outwardly from the outer portion of said hub substantially tangential thereto with a curvature in the direction of rotation the outer end of said face pro- Jecting forwardly beyond the axis of the shaft to provide delayed discharge of the washing fluid therefrom and delivery thereof primarily into that portion of the container above said shaft on the downwardly moving side thereof, and another face on said hub extending substantially radially therefrom and having a forwardly and reversely curved face thereon providing for more immediate discharge of fluid therefrom and primarily into the portion of the container which lies above the upw- .rdly moving side of the shaft, and means for rapidly rotating said shaft.to causedischarge of 'a finely divided spray.of said washing fluid throughout the interior of said container.

GORISON ELLIS STOCKHAM.