US1943636A - Dishwashing machine - Google Patents

Description

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E. S. STODDARD DISHWASHING MACHINE Filed May 25, 1927 I 3 Sheets-Sheet 2 Jan. 16, 1934B E. s. s-roDDARD y 1,943,636

DISHWSHING' MACHINE Filed nay 2s, 1927v s sheets-sheet z 17u/711671: .Efcggar Jtcddard Patented Jan. .16, 1934 DISHWASHING MACHINE Edgar S. Stoddard, Berwyn, Ill., signor to The Conover Company, Chicago, Ill., a corporation l 'of Illinois Application May 23, 1927.. Serial No. 193,414

14 0mm. (ci. 141-9) This invention relates to improvements in liquid containing machines particularly in dishwashing machines.

A dish-washing machine is principally designed as a labor saving device, and in domestic installations is for the purpose of reducing the burden of the housewife and relieving her from manualv labor and contact with dirty dishes and greasy water as much as possible. It is also for the purpose of increasing the cleanliness and sanitary conditions in a kitchen by eliminatingthe slop- -ping and splashing of soapy and dirty water, the greasy wash rags and brush and the dripping wash pans, which always accompany the manual method of dish Washing.

The amount of water placed in a dish-washing machine has been rather roughly regulated in the past by pouring in several buckets-full of Water, often scalding hot, with the cover of the machine removed. Whenever it was desired to add more water to the machine either for washing or rinsing purposes, it was necessary for the operator to stop the machine, to remove *the cover, which frequently was very hot, and to 25- pour in the additional water, at the same time permitting a large quantity of steam to escape into the kitchen. To remove the waste liquid from the machine it was ,usually necessary to place a bucket or other container under a stopccck in the bottom of the tank of the machine. The stop-cock then was opened, the waste liquid was collected in the container and ilnally was dumped into a drain. The motor switch in these installations customarilyA was upon the floor in a cord stretchingfrom a plug and was diiiicult to reach and operate.

It is obvious that the necessity for the operator exposing him or her self to the steam and hot vapors when adding the wash water or rinse water to the tank, the necessity of laboriously adding the wash and rinsing water and removing the waste liquid by a bucket, with the incidental splashing and slopping, and the required stooping over to operate the motor switch and the waste cock, were not conducive to the purposes for which the machine was designed.

Moreover, in many types of dish-washing machines, especially those of the projector-type, it is very desirable to maintain a fairly constant volumeor a constant level of water in the device so that the agitator, propeller or impeller for bringing the vcleansing liquid into contact with the dishes, should be immersed in water to a definite depth during operation. All these devices function best, and are designed to operate at maximum emciency, when they are either covered by water or are only partially covered by water to a certain depth. The usual method of arbitrarily adding several quarts has not proven to be satisfactory.

The object of this invention is to provide a dishwashing machine to which can be added wash and rinse water with a of manual operations and with a maximum of cleanliness.

Another object of this invention is to provide a. dish-washing machine from which it is possible to remove the waste and greasy liquids with a minimum of manual operations and with a maximum of cleanliness.

A further object is to provide a dish-washing machine which will automatically regulate the amount of liquid which can be added to, or which will be contained in, the machine at any time.

A still further object of this invention is to provide a dish-washing machine in which all the f5 operating controls will be placed within easy reach.

A still further object is to provide a dish-washing machine which will not leak any water past the cover or through the propeller bearing.

A still further object is to provide a compactly organized machine which will have a high operating eiliciency, which will be self cleaned, and which will not be readily subject to break-down or misadjustments in use.

Although this invention is broadly directed to improvements in connection with all dish-washing machines, it is especially directed to improvements to be used in connection with the projectortype of washing machines, which are more fully described and shown in the copending application, Serial Number 353,841 filed January 24, 1920 which has matured into Patent Number 1,679,465, granted August 7, 1928.

The functioning of this type of machine depends upon the operation of a small unenclosed screw-like impeller, with spiral blades, which impeller rotates at a high velocity of 'the order of 1,000 to 2,000 R. P. M. in the lower part of the tank of the machine. Only the lower part of this impeller is immersed in the liquid and as it turns the impeller elevates the liquid from its lower spiral screw portions to its upper concavo-projectors which throw the cleansing liquid at a tremendous velocity directly` upon, or into, the objects to be cleaned. Since there are no bailles or deflectors to break the force of the liquid, the total force ot the projected mass of liquid is effective for cleansing purposes. Although the velocity ot the cleansing liquid is very high, the

volume of cleansing liquid is very small, and as a result a veiy effective cleaning is obtained with a minimum and most eiiicient use of soap and water. 'Ihe projected mass of liquid at the same time keeps the interior of the vessel clean and causes all the food particles and other solid matter to collect at the bottom .ofthe casing from whence they can be readily removed. In the operation of this unenclosed projecting impeller. it is important that only the lower portion of the impeller be immersed in water, since if the impeller be totally immersed, it will not result. in. an efficient cleansing' action. In view of the fact that the dishes and other objects are kept out of contact with the body of wash liquid contained in the bottom of the casing, and the cleansing is solely due to contact with the projected mass of liquid it is important that the proper operating conditions be maintained for producing such a cleansing action.

The following drawings illustrate one embodiment of the invention as applied to the projectortype of dish-washing machines, to which the in'- vention is by no means restricted.

Figure 1 represents a vertical sectional view of the washing machine upon the line 1-1` of Figure 2:

Figure 2 represents a sectional top view of the lower part of the washing chamber upon the line 2-2 of Figure 1;

Figure 3 represents a vertical side view showing the inlet and outlet connections of the machine upon the line 3-3 of Figure 1;

Figures 4 and 5 are detail views showing the enclosed switch for operating the motor; and

Figures 6 and 7 are detail views of the means of obtaining a water-tight fit between the cover and the tank;

Figure 8 is a vertical sectional view of the pump well and bearing upon the line 8 8 of Figure 2. f

In Figure 1, the washing machine is composed of a tank 11, which forms thewashing chamber, a. cover or lid 12 adapted to closely adhere to the top of such tank and three supporting legs 13 which ride upon rollers 14, so that the washing machine can be readily moved from place to place. Adapted to be placed within the washing chamber is a basket or a tray 15 for holding the dirty dishes. Any other holder or holders having a similar function may be used in place of the one shou n.

This basket is composed of wires and is adapted tohold the dishes and other similar objects within the washing chamber in effective position in respect to the cleansing liquid and at the same time elevated above the main body of liquid. In the holder 15 the dishes are usually placed vertically in circular formation around the outer portion of the basket while the other plates and saucers, etc., are disposed regularly within the outer circle so that the water can be thrown freely upwardly and outwardly between the dishes, will impinge between the outer plates andv vertical walls 11 of the washing chamber, and will be reilectedlargely back over the dishes and caused to fall in sheets of spray thereupon.

The washing chamber, during4 the cleansing operation, contains water up to the level designated 16, the lower conical portion 17 of the tank 11 serving as a reservoir for such body of liquid. The impeller 18 is placed in the lower part of the washing chamber and is composed of two approximately parallel spiral blades 19, which widen out into `the projectors 20 at 'the top of the impeller. These widened portions 20 are slightly concave inwardly and are adapted to throw the water, which is elevated by the lower screw portion 19. against the objects to be cleaned at a. high velocity. The impeller 18 is placed below the basket containing the dishes and at all times it is important that only the lower portion thereof beixmnersed or otherwise a desirable. projection effect will not be obtained.

The impeller 18 is driven at a high velocity through its shaft 21 which is directly connected to the motor 22, whose shaft 23 is connected to the shaft 21 of the impeller by the insulating coupling 24 (see also Figure 8). This insulating coupling is principally composed of a sleeve of a material, not a conductor of electricity, and is adapted to grasp the lower end of the impeller shaft and the upper end of the motor shaft. The insulating coupling 24 also acts as a lower journal for the shafts 21 and 23 and is retained in position by the shoulders 25 upon the shafts 2l and 23. The air gap 26 separates the-ends .of these shafts. The collar 27 which is screwed into the top of the top of the tubular bearing of the pump well casting forms the upper bearing. The impeller shaft 21 is screwed into the disk 28, which is welded to the shell 29 of the impeller 18. The shaft 21 of the impeller 18 and the shaft 23 of the motor are always kept in correct alignment since the top of the tubular bearing and the motor mounting are cast in one piece.

This avoids the many difculties experienced with many washing machines, which are belt driven by a 'motor with the result that the belt is constantly slipping off or becoming ineiective to operate the washing apparatus.

One of the important features of the present invention is that the intake and the discharge are combined, elevated, and made adjustable, so

that it will be possible to admit water to the l dish-washing chamber from the faucets of the ordinarily arranged sink or wash basin, and to discharge the waste water from the tank where it can 4be run into the sink and allowed to go to waste without plumbing connections.

The inlet conduit 30 (see Figures l and 3) has an intake at an elevated position above ythe lid 12 of the tank of the dish washing machine, extends down along the'side of the tank and discharges into a well 31, which is just below lthe impeller 18. The waste water flows down through the well 31 and the opening 32 (see also Figure 8) into a pump chamber 33 from whence it is elevated through the outlet conduit 34 to the discharge of said conduit at the drain receptacle. The outlet conduit 34 in the preferred embodiment nally terminates adjacent to the intake of the inlet conduit 30 in the casting 35 so that b oth conduits can be readily placed in position for drainage of the waste and for the admission of wash and rinsing water over an ordinary sink.

` The first sections of the conduits are formed concentrically so it will be possible to adjust both the inlet and outlet conduits simultaneously. In the present embodiment the outlet conduit 34 is formed within the inlet conduit 30 which latter consists of an annnlar chamber, but the position of these conduits can be reversed if desired. The first element consists of a casting 35 which has an opening in the upper part thereof into vwhich water from a faucet can be allowed to about a concentric pipe section 36, which is stralght and can be of varying lengths. The concentric tubing 36, in turn fits into the concentric elbow 37 which is removably fitted into the cock plug casting 38. In the casting 38 the two conduits are separated and resolved into two parallel passages, which lead to and from the well of the washing machine. The connecting ends of the sections 35, 36 and 37 are .provided with water-tight tapered flttings which will permit the sections to be rotated and adjusted, and also removed when the machine is not in use.

The inlet 35 is provided with an annular ange 235 (shown in Figs. 1 and 3) terminating in a downwardly extending tip portion. Water from the source of supply is thereby prevented from running down the outside of the conduits to the dish washing machine, and is caused to drop downwardly into the sink.

The inlet and outlet conduits 30 and 34 (see Figures 1, 2 and 3) are carried from the plug casting 38 to the float chamber casting 41 by the pipe sections 39 and 40. The inlet conduit 30 and the outlet conduit 34 are farther carried to the pump well casting 44 from the iioat chamber casting 41 by the pipe sections 42 and 43 respectively. The pipe sections 42- and 43 t into projecting portions of the casting 44 which forms the pump well chamber, and which contains the tubular bearing 45 in which the journal 24 and bearing 27 of the motor and impeller shafts are held. The casting 44 is tightly attached to the lower conical portion of the tank 11 by means of the screws, rivets or other clamping devices 46, so that no water can pass through the joint between the tank and the casting. The casting 44 has a projecting portion which contains the openings 47 and 48 (see Figures 1, 2 and 8) which cooperate with the inlet and outlet pipe sections 42 and 43 respectively to form a water tight joint. No water can pass through the tubular bearing 45'since the top of the tuvbular bearing into which is screwed the upper bearing 27, is above the normal water level 16. The tubular bearing 45 is further protected against leakage by the brous washer 49 (see Figure 8), and the air pocket which will be formed in the annular space between the tubu-v lar bearing 45 and the impeller shell 29. It therefore is apparent that there will be no op- .portunity for the water in the bottom of the tank 11 to leak into and injure the motor Z2, which can safely be placed centrally below the tank.

The lower part of the casting 44 has a iiange 55 (see Figure 1) which is bolted to the motor 22, and aligns the shaft of said motor by the 1 shoulder` 50. The bolts 51 pass through the supporting member or spider 52 which is attached through the channel-shaped braces 53 to the legs 13 by the bolts 54. Above the flange 55 the casting 44 is provided with openings (not shown) to permit of access to the motor shaft 23.

The pump well within the casting 44 is separated into two chambers (see also Figure 8), an inlet chamber 31- and an outlet chamber 33, by the plate 56, which has a central opening 32 much larger than the impeller shell 29, so as to permit free passage of the waste liquor and food particles from the conical portion 17 of the tank into the pump chamber 33. The plate 56 is held in position by the set screw 57 (see Figure 8). To the lower part of the revolving shellor shear cf the impeller is spot-welded or clamped a centrifugal device or ejector 58 which sets into, and

wall 11 of the tank and contains a oat chamber 59 and a passage 60 for the outlet conduit. The iloat chamber 59 contains the iioat 61 which is pivoted at the oat hinge 62 and is raised or lowered in accordance with the level of the water within the float chamber 59. The ball check 63 is operated by the oat 6l. A seat for the ball check 63 is formed inv a hollow threaded piece 64 which screws into the cover 65 of the float chamber 59.

The cock plug casting 38 (see Figures 1 and 3) is attached to the wall of the tank 11 of the washing machine by the screws 67. It contains a cock plug 68, which turns in a seat 69 and which is held in position by the washer 70 and the nut v71. The assembly plug 73 permits the passage 30 to be opened so that the cock plug l68 can be assembled, disassembled or cleaned.

The head of the cock plug 68 is provided with a square or hexagonal projection 72 to which may be ailixed a handle or a lever so that the valve can be turned, opening or closing the outlet conduit 34 as desired. In Figures 1 and 3 the outlet conduit is shown in open position.

The channel legs 13 form a support for, and extend up along the sides of the tank 11. These channel members are attached to the side of the tank by the bolts 74and the brackets 75 (see Figures l and 2).

One yof these channel supporting members 13 (see Figures 3, 4 and 5) encloses a switch 76 near the top of the support and adjacent to the cover of the machine where it will be readily available and can be manipulated by one standing adjacent to the casting 35, which contains the intake of the inlet conduit 30 and the discharge of the outlet conduit 34. For a short distance the side of the channel member is attened and slotted, as indicated at 77, so as to permit the handle 78 of the switch 76 to project and be operated. This switch starts and stops the motor 22. Connection between the motor 22 and the switch 77 is made by the cable 79 which is enclosed in the channel member 13', and the channel shaped brace 53 of the supporting member 52 (see Figure 1). This cable 79 has an outlet 80 near the lower end of the leg 13. In this construction there is very little possibility of the cable 79 becoming wet and short circuiting, and the cable 79 is protected and not vents the escape of any spray or water from the interior thereof.

The lid or cover 12 (see Figures 6 and 7) is attached tothe top of the tank 11 by means of a clamp which comprises a circular spring 85, one

end of which is pivoted to the lid at 86 and the 90 is stretched around the lid just below the pro- Lac " uh. un

jection or lip 91. When the lever 87 is fulcrumed under the roll 89 and moved toward the side of the tank 11, the circular spring 85 will be forced off-center (as shown in Figure 6) and the rubber ring 90 will be compressed between the roll 89 and the lip 91.

The'rubber pad 92, which is retained in place by the lower horizontal portion of the spring 85, will prevent the lever 87 from marking or scratching the side 11. This tight connection will prevent any of the spray or projected water sent up by the rapidly revolving impeller from passing between the cover or lid 12 and the tank 11.

If desirable, one of the clamps can be replaced by a hinge (not shown) which will enable the cover to swing back into a horizontal inverted position, in which it can be utilized as a tray for supporting the dirty dishes about to go into the washing machine, or washed and rinsed dishes just removed from the washing machine. It is obvious, of course, that some stiffening means must be used to hold the cover in horizontal position whenit is used in this fashion.

The method of operation is as follows. When the machine is to be used, the cover is opened or removed and the dirty dishes, cups, saucers, etc., are placed within the basket or baskets, and said basket or baskets are then lowered into the tank, if not already in position. Soap is added and the lid is closed. The washing machine is then wheeled over to a sink, if it is notalready there, and the upper portion of the casting 35 is placed under a faucet and the cleansing liquidis allowed to run therein. The liquid will pass down through the conduit 30 into the lower part of the tank 11, until it reaches the level 16, whereupon the water in the float chamber 59 will be at a sufllcient height to raise the float 61 which will in turn lower the ball check valve 63 into its seat 64 and prevent further passage of the water through the conduit 30. It will be apparent to the operator when suicient water has been added, since the water will then commence to overflow or spill from the inlet of the conduit 30 in the casting 35 into the sink or drain. The faucet is then turned olf and the motor started.

In case it might be desired to maintain a substantially constant water level during operation of the machine, the conduit 30 from the intake at 35 down to the ball check 63 can be made of sufricient capacity to add enough additional cleansing liquid during operation to maintain such desired level. The decrease in level will be presumably caused by the retention of liquid by the walls of the tank, the baskets, and the dishes, saucers,

- cups, etc., and will also be caused in the present machine due to the fact that the centrifugal pump 58 will force an increased volume of liquid into the outlet conduit 34, even though the cock plug 68 is closed. When the level is decreased in this manner the ball check 63 will be opened and a suil'icient amount of water will be admitted to restore the desired level.

The cleansing liquid which has passed the ball check 63 will form a pool in the lower part of the tank 17, and when the impeller is put in rapid motion by switching on the power, a projection of the suds and cleansing liquid will result with direct impact upon the dishes, cups, saucers, etc., to be cleaned. At the same time as the impeller is revolved, the centrifugal device or ejector 58 will be rapidly turned in the chamber 53 and will result in a separation of the food and other solid particles which collect in the bottom of the tank 11, and it will force them into the conduit 34 and thus leave only soapy water practically free of solid particles to be utilized by the impeller in `further cleansing the dishes. During this time,

the tank.- When the dishes, etc., have been sufllciently Washed, by opening the vplug valve 68, the dirty, greasy, water will be forced out through the conduit 34 from the pump chamber 33 by the centrifugal pump. At the same time, fresh, clean, rinsing water can be allowed to ow in through the conduit 30, to be elevated by the impeller and used to rinse the dishes, the baskets and the interior of the tank.

When the centrifugal pump 58 has a high capacity and will remove liquid at a faster rate than it can be supplied through conduit 30, the rinsing operation is most satisfactorily carried out by allowing rinsing liquid to flow in through the inlet conduit 30 with the cock plug 68 in the outlet conduit 34 in closed position until the tank is filled to the normal water level. The impeller is then started, if it has not already been in operation while the rinsing water was being admitted, and the rinsing is allowed to continue for a time. 'Ihen the cock plug 68 is opened and the waste rinse Water discharged through outlet conduit 34. The cock plug 68 is then again closed and the operation repeated.

This is continued until sufllcient rinsing has taken place and then, by turning off the switch 77, the motor is stopped, the lid 12 is opened or removed, and the dishes are taken out. At this point both the dishes and the tank will be thoroughly cleaned and will dry in a short time.

It will be noticed that keeping the food and other solid particles in conduit 34 during the cleansing operation will enable a more eicient use of the soap and water, since the impeller will be only supplied with substantially clean, soapy water.

What is claimed is:

1. In a dishwashing machine, a tank, a holder for soiled dishes disposed in said tank, a water propelling device disposed in the lower part of the tank, a pump for removing Waste water from the tank, a well chamber below said tank divided into an inlet chamber and an outlet chamber, said inlet chamberand outlet chamber being inner-communicating and said pump being situated in the outlet chamber, an external inlet conduit for carrying cleansing liquids to the in-- draining bottom with an opening in the lowerA portion thereof, a dish holder in said tank, a rotatable spray projector in said tank having its lower portion operating in the upper portion of a pool of cleansing liquid in the tank to transfer the same to articles in the dish holder, means for rotating said spray projector, a well chamber depending from the bottom of said tank about the periphery of the opening therein, said chamber being located beneath the spray projector, means for supplying fresh cleansing liquid to the tank, a centrifugal pump in the well chamber, an outlet conduit communicating `with said chamber through the wall thereof, and means for closing said outlet conduit during operation of the machine.

3. In a dishwashing machine, a tank having a draining bottom with an opening in the lower portion thereof, means for supplying the tank l iwi with fresh cleansing liquid, a dish holder in the tank, a rotatable lspray projector in said tank, a well chamber depending from the bottom of the vtank about the periphery of the opening therein, said chamber being located beneath the spray projector, a centrally perforated partition in said chamber dividing the same into two compartments of substantial depth, a centrifugal pump in the lowermost of said compartments, an outlet conduit'exterior of said tank and having a substantially horizontal portion communicating with the lowermost of said compartments. 'and a valve operative to open and close said outlet conduit.

4. In a dishwashing machine, a tank having a draining bottom with an opening in the lower portion thereof, a dish holder in the tank, a spray projector'in the tank, a well chamber depending from the bottom of the tank about the periphery of the opening therein, said well chamber being located beneath said projector, a centrally perforated partition in said chamber dividing the same into two compartments of substantial depth, a centrifugal pump in the lowermost of said compartments, an inlet conduit communicating with the uppermost of said compartments, and an outlet conduit communicating with the lowermost of said compartments.

5'. In a dishwashing machine,'a tank, a spray projector therein, said projector operating in a pool of cleansing liquid in said tank to project said liquid upon articles in said tank, an external conduit communicating with the lower portion of said tank, a valve chamber in said conduit, a oat actuated valve in said chamber adapted to be closed when a Vpredetermined liquid level is established within the tank, a, portion of said conduit being above said chamber and operative to serve as a reservoir for an extra supply of water to assist in the maintenance of a constant liquid level within said tank.

6. In a dishwashing machine, a tank, a tubular bearing extending upwardly from the bottom of the tank, a water propelling device in the tank, a shaft for said device extending downwardly into said tubular bearing, a motor external of said tank and having a shaft extending upwardly into said bearing, and a driving connection between said propelling device shaft and said motor shaft, comprising a sleeve extending over and forming a journal for said shafts within the tubular bearing.

7. In a dishwashing machine, a tank having a draining bottom, a tubular bearing extending upwardly from the lower portion of the tank bottom, a water propelling device above said tubular bearing and having a shaft extending downwardly into said bearing, a motor external of said tank and having a shaft extending upwardly into said bearing, said propelling device shaft and said motor shaft being spaced within the bearing, and a sleeve of insulating material within said bearing forming a driving connection between said shafts and a journal therefor.

8. In a dishwashing machine, a tank, a tubularl bearing extending upwardly from the bottom of the tank, an actuating shaft extending downwardly into said tubular bearing, a motor mounted external of the tank having a motor shaft extending upwardly into said bearing and spaced from said actuating shaft, a driving connection of insulating materialbetween said shafts, said connection forming a journal for said shafts, A

said actuating shaft being journaled in the upper portion of said tubular bearing, an apron shell attached to the upper portion of said actuating shaft and extending downwardly about the tubular bearing, a water propelling device attached to the upper portion of said shell and a centrifugal ejector attached to the lower portion of said shell.

9. In a dishwashing machine, a tank, a tubular bearing extending upwardly from the bottom of the tank, a. motor mounted externally of said tank and having a shaft extending upwardly into said tubular bearing, an actuating shaft in said tank extending downwardly into said tubular bearing, said motor shaft and said actuating shaft being spaced and operatively connected by a. coupling of an insulating material, and an apron shell attached to the upper portion of the actuating shaft and extending downwardly around the tubular bearing, a water impelling device attached to the top of the shell, and a centrifugal ejector attached to the bottom of the shell.

10. In a dishwashing machine, a tank having a draining bottom with an opening inthe lower portion thereof, a well chamber secured to the bottom of said tank around the periphery of theopening therein, a tubular bearing integral with and extending upwardly from said well chamber to above the normal liquid level of said tank, a motor external of said tank and having a shaft extending upwardly into the tubular bearing, an actuating shaft in the tank extending downwardly into the tubular bearing and spaced from the motor shaft, said shafts being operatively connected by a tubular journal, a

said draining bottom, a motor mounted exter-` nally of said tank and having a shaft extending upwardly into said bearing, a liquid propelling device in the lower part of said tank having a shaft extending downwardly into said tubular bearing, a sleeve positioned in said bearing connecting the ends of said shafts, a flange extending outwardly from the lower portion ofv said bearing and means for connecting said flange to the body of said motor.

12. In a dishwashing machine, a tank having a draining bottom provided with an opening in the lower portion thereof, an integral bearing member comprising an elongated vertical tubular bearing, an upturned cup-shaped member and a downturned cup-shaped member, said members being attached to the tubular bearing adjacent its lower end and said upturned member being attached to the bottom of said tank about the periphery of the opening therein, a motor attached to said downturned member and having a shaftextending upwardly into the tubular bearing, a water impelling device in said tank provided with a shaft extending downwardly into said tubular bearing, and a sleeve positioned in said bearing connecting said shafts.

13. In a dishwashing machine, a tank having a draining bottom provided with an opening in the lower portion thereof, a rotatable water circulating device in the lower portion of the tank, an integral bearing member tted to the bottom of the tank about the opening therein, said member comprising an elongated vertical tubular bearing extending into said tank, a downturned cup-shaped member attached to said tubular bearing adjacent its lower end, and an outwardly extending flange around the lower edge of said cup-shaped member, a motor external of said bearing member having a shaft extending upwardly into the tubular bearing, an actuating shaft connected to' the water circulating device in the tank and extending downwardly into said tubular bearing, means for connecting said shafts, and a shoulder on said outwardly extending flange cooperating with the body of said motor to center the same.

14. In a dishwashing machine, a tank having a draining bottom, a well chamber communieating with the lower portion of said bottom, an upright spray-projecting impeller mounted in said tank above said well chamber and spaced from said bottom, said impeller having its lower portion operating in the upper portion of a pool of cleansing liquid ln the bottom o! the tank whereby to transfer the same in the form of spray to articles in said tank, a centrifugal pump in said well chamber, an outlet conduit communicating with the lower portion of said well chamber, and a shut-oil valve in said outlet conduit operable to prevent liquid from passing out ot said well chamber in one position, and operable to allow liquid to be removed from said well chamber in another position.

EDGAR S. STODDARD.

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