US2840838A

US2840838A - Dish washer with automatic jet operation

Info

Publication number: US2840838A
Application number: US376128A
Authority: US
Inventors: Jr Charles Kepler Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-08-24
Filing date: 1953-08-24
Publication date: 1958-07-01
Anticipated expiration: 1975-07-01

Description

July 1, 1958 c, BROWN, JR 2,840,838

DISH WASHER WITH AUTOMATIC JET OPERATION Filed Aug. 24, 1953 2 Sheets-Sheet 1 1 rrrl AT TORNEY5 y 1, 1958 k. BROWN, JR 2,840,838

DISH WASHER WITH AUTOMATIC JET OPERATION Filed Aug. 24. 1953 2 sheets-sheetz H INVENTOR.

WNW QWWM mm Q .8

ATTORNEYS United States Patent DISH WASHER WITH AUTOMATIC JET DPERATION Charles Kepler Brown, .ln, Verona, N. 3'.

Application August 24, 1953, Serial No. 376,128

19 Claims. (Cl. 15-44) which are covered with material that will not come off a readily in the washer.

It is an object of this invention to provide a small dishwasher in which each dish is separately washed. The manipulation of the successive dishes is done so quickly that all the dishes for a moderate sized family can be washed with this invention in less time than is required for setting up and going through the washing cycle of the larger and more expensive automatic dishwashers.

One feature of the invention relates to apparatus by which a soap solution is first sprayed on the dish automatically as the dish is brought into position to be scrubbed by rotating brushes; Another feature of the invention related to automatic rinsing of the dish as 'it moves away from the brushes that do the scrubbing.

The invention is preferably constructed in such a way that it operates equally Well for washing plates, glasses, tumblers and pots and pans.

Other objects, features and advantages of the invention will appear or be pointed out as the description proceeds.

In the drawing, forming a part hereof, in which like reference characters indicate corresponding parts in all the views:

Figure 1 is a vertical sectional view through a dishwashing machine made in accordance with this invention;

Figure 2 is a top plan view, on a reduced scale, of the dishwashing machine showing Figure 1;

Figure 3 is a greatly enlarged, sectional view taken on the line 3-3 of Figure 1; and

Figure 4 is a greatly enlarged sectional view taken on the line 4--4 of Figure 1.

The dishwashing machine includes a base 10 having a cylindrical metal sidewall 11 over which a flexible rubber shell 12 is placed. The rubber shell decreases somewhat in diameter toward its upper edge 13 so that the inside surface of the rubber shell, near the upper edge, deflects jets of water downwardly to eliminate splashing. In the construction illustrated there are some conduits or passages 15 extending upwardly within the rubber shell 12 at angularly spaced regions around the circumference of the rubber shell. These conduits or passages 15 lead to nozzles 17 which direct water sprays inwardiy toward the vertical axis of the dishwashing machine, and at an angle downwardly.

The base 10 has a bottom 20, and has an inner wall 21 spaced from the wall 11 to provide an annular ice channel 22 for used water. This annular channel drains through an outlet 24.

There is a cover 26 secured to the upper edge of the inner wall 21. This cover 26, together with the sidewall 21 and the portion of the bottom 20, within the sidewall 21, provide a reservoir for soap solution.

The washing machine has a turntable 30 supported by a bearing on a central hub assembly 32 located at the center of the machine. The turntable 30 has an inside surface 34, which is preferably provided with gear teeth that mesh with a driving gear 35 extending upwardly from a pulley wheel 36.. The gear 35 and the pulley wheel 36 rotate about a stud shaft 37 secured at its lower end to the cover 26 of the reservoir.

The pulley 36 is driven from a smaller pulley 40 through a belt 41. The smaller pulley 40 is connected to the upper end of an armature shaft 43 of an electric motor 44 enclosed in a housing 45 which is located in the soap reservoir. The housing 45 completely seals the motor 44 from any contact with the liquid contents of the reservoir. The

pulleys

36 and 40, connected by the belt 41, are merely representative of a speed reducer between the motor 44 and the turntable 30.

In the preferred construction, the turntable 30 is preferably a pressed metal stamping with a downwardly extending skirt 47 which overlaps the upper end of the sidewall 21 so as to protect the

pulleys

36 and 40, and the belt 41, from having water splashed on them from the sidewalls of the rubber shell 12.

In order to add weight to the turntable 30, and thus obtain a flywheel effect, a ring 50 is attached to the turntable 30 around the periphery of the turntable and outside of the turntable wall which is shaped to provide the gear teeth. The use of a turntable which is heavy enough to have some flywheel effect, makes it practical to use a smaller motor of less power. The turntable 30 runs freely, under no load, most of the time. This permits the motor 44 to accelerateuntil it is rotating at the full speed for which it is designed. If the load on the turntable slows it down, when a dish is held in position for scrubbing, the slowing down is made gradual by the flywheel effect of the turntable, and the deceleration is not substantial during the short period that each successive dish is held in contact with the brushes which are carried by the turntable.

The construction shown is equipped with a brush 53 consisting of a backing element having an outer frame 54 and an inner frame 55. The outer frame 54 has a section similar to an inverted U, and it has bristles 56 extending from the frame 54 inwardly, upwardly and outwardly, as illustrated.

The inner frame 55 has bristles 56 which extend outwardly and upwardly. The bristles from the inner frame 55 extend in directions which are 90 degrees removed from the direction in which the bristles of the frame 54 extend, as best shown in Figure 2. For clearer illustration in Figure 1, however, the bristles of the frame .55 are shown as though rotated 90 degrees from their actual positions.

The inner frame 55 has grooves 60 in its inner face near the lower end of the frame; these grooves 60 fit over complementary splines 61 on an upstanding center hub of the turntable 30. Thus the brush frames 54 and 55 rotate as a unit with the turntable 30, but they can be lifted out of the washing machine by merely sliding them upwardly along their spline lined connections with the turntable hub. Although the frames 54 and 55 are shown constructed in one piece, it will be understood that they can be separate, with each one extending around only a portion of the periphery of the turntable hub, or with any other suitable provision for driving both of the brush frames simultaneously and as a unit with the turntable.

The hub assembly 32 extends through an opening 63 in thev cover 26, and serves to close that opening. The portion of the hub assembly, that provides a bearing for the turntable hub, is secured to the cover 26 at 64. The center portion of the hub assembly, however, extends downwardly and fits into a recess 65 in the bottom 20 of the base. The center portion of the hub assembly 32 can be lifted out of the machine when necessary for cleaning, as will be explained in connection with Fig. 4, but it is securely held in position by gravity during the operation of the machine.

A supporting tube 66 extends through. the upper end of the hub assembly 32 and this supporting tube 66 telescopes into the hub assembly 32. There is a spring 68 in the tube 66. for normally holding the tube in the raised position shown. in full lines in Figure l. A. spray head 70 fits into the upper end of thesupporting tube 66. The spray head 70 is preferably made of rubber or other soft material for contact. with a plate 72 or any other object which is to be washed by the machine. There are small protuberances 73 projecting upwardly from the top face of the spray head 70 for the purpose of holding the plate 72 spaced by a slight distance from the top face of the spray head 70.

The top surface of the spray head 70 is made with sufficient radial extent so that a person using the dishwasher Will be conscious of the contact of the plate 72 with the different protuberances '73. The object is to hold the plate 72 so that its surface is substantially parallel to the top surface of the spray head 70. If the area of the spray head is too small, it is difficult to tell whether the plate is in contact with the spray head around all sides of its longitudinal axis. When the plate is held parallel to the top surface of the spray head, the distribution of water across.

the surface of the plate is more uniform when water is supplied through the spray head.

A conduit or passage 75 extends along the longitudinal axis of the spray head 70. When the tube 66 is pressed downwardly for a predetermined distance into the hub assembly 32, water from the supporting tube 66 flows through the conduit or passage 75 and into contact with the surface of the plate 72. This water, under substantial pressure, flows radially outward in all directions across the top of the spray head 70 and is projected as radial jets or a circular curtain of water across the surface of the plate.

The water for washing the plate 72 .is not supplied to the spray head until the supporting tube 66 has been pushed downwardly below the top edge of the rubber shell 12. Thus the radially projected water strikes against the inside surface of the wall of the rubber shell 12 and is deflected downwardly to prevent any splashing of water over the top edge 13.

The internal construction of the hub assembly 32 will be described in connection with Figure 4. For the preseat, it is sufiicient to understand that the supporting tube 66 is normally held in the raised position shown in Figure l, and that it can be pushed down into the hub assembly to bring the plate 72 into contact with the brush 53. In the operation of the machine, plates 72 are successively placed on the spray head 70 and pushed downwardly until the supporting tube reaches the location at which Water is projected across the downturnedface of the plate. This initial spraying of water is done with a solution of soap.

Continued downward movement of the plate 72 brings it into contact with the brush 53 which rotates and scrubs the face of the plate.

,The length of time that the plate is held against the brush 53 will depend upon how dirty the particular plate might be and is a question of judgment on the part of the person using the dishwasher. From one to three seconds is usually sufiicient scrubbing time. When the pressure holding the plate down is released, the spring 68 pushes the supporting tube 66, and plate 72, upwardly into their original position.

During the upward movement of the plate 72,-away from the brush 53, clear rinsing water is sprayed across the surface of the plate. Before the plate reaches the level of the top edge 13, the rinsing water is automatically cut off. When the plate 72 has been lifted out of the shell 12, by completion of the upward movement of the supporting tube 66, the person using the washer moves the plate to a drying rack and places the next plate on the spray head 70. It is not necessary for the person using the dishwasher to have any contact with the water. No water is being sprayed when the plate is first placed on the spray head 70, and the plate can be pressed downwardly into contact with the brush 53 by merely pressing one hand against the top surface of the plate.

Ordinarily, it is not necessary to wash the bottom faces of the plates. If. they need washing because of food picked up by stacking of the plates, the bottom surface can be washed by placing it on the spray head 70 in the same way as the down-turned top surface already described. As an added refinement for the dishwasher where it is not objectionable to have the Water come in contact with the hand of the person using the machine, the nozzles 17 are, provided. These nozzles 17 are l0- cated in position to project water against the upper surface of the plate while the down-turned top surface of the plate is in contact with the brush 53. The nozzles 17 are to be considered. optional, therefore, and the machine can be constructed so that no water is projected from the nozzles unless the operator of the machine gives the plate a final downward push after it is in contact with the brush 53.

Water is supplied to the dishwashing machine through an inlet connection 78, and the passages 15 are supplied with water through pipes 79 which connect the passages 15 with the hub assembly 32..

Figure 4 shows the construction of the hub assembly 32. It includes a soap solution pump 80 at the lower end of a cylinder 81. The pump has a piston 82 and a cylinder head 83. The cylinder head 83 is the bottom of the hub assembly 32 and fits into the recess 64. One or more channels 85, in the bottom face of the cylinder head 83, provides for the flow of soap solution from the soap solution reservoir to an inlet passage 88 which opens through the cylinder head 83 into the cylinder 81. A ball check valve 89 prevents return flow of soap solution through the passage 88. The piston 82 is preferably packed by providing an O-ring 91 in a piston ring groove. The piston 82 is urged upwardly by a spring 92 compressed between the piston 82 and the cylinder head 83.

There is a passage 94 through the face of the piston 82, and this passage 94 has a ball check valve 95 at its upper end. As the piston 82 moves downwardly in the cylinder 81, the liquid contents of the cylinder, below the piston, are forced upwardly through the passage 94 into a tube 97. This tube has prongs 99 around its lower end so that it cannot be closed by the check valve 95. The tube 97 is connected to the piston 82 by a bushing 101. Above the bushing 101, the piston 82 is hollow to provide clearance for receiving the lower end of the supporting tube 66 when that tube is telescoped into the hub assembly 32. There is a packing washer 103 on top of the bushing 101 for contact with the lower end face of the tube 66.

The cylinder 81 extends upwardly for a substantial distance and it has

ports

105, 106 and 107 at different levels. At the upper end of the cylinder 81 there is a cylinder head 110 with a center sleeve 111 which serves as a bearing in which the tube 66 slides. The cylinder head 110 has packing 112 around the tube 66, and this packing is preferably an O-ring. The lower end of the spring 68 rests against a flange 115 at the tube 97.

The lower end of the sleeve 111 is secured to a partition 113 located at a fixed position in the cylinder 81. Immediately above the partition 118, there are elongated ports 129 through the sleeve 112. These ports 120 permit water to enter ports 121 in the tube 66 when the tube 66 is pushed down far enough to bring its ports 121 to the level of the ports 120.

The cylinder 81 fits into a fixed center hub 125 which is attached to the cover 26 and which is, therefore, a fixed part of the machine. There is packing, preferably O-rings 127, at the upper and lower ends of the hub 125 for preventing escape of water from the hub along the outside surface of the cylinder 81. Within the hub 125, there are

annular recesses

130 and 131 at the levels of the

cylinder ports

105 and 106, respectively. There is a passage 133 through the wall of the hub 125 in communication with the water inlet connection 78. The annular recess 133 is connected by a passage 135 to an upper water chamber 136 in the hub 125. This upper water chamber 136 in the hub 125 extends along the cylinder 81 to the level of the ports 107.

Figure 4 shows the parts in the positions which they occupy when the supporting tube 66 is at its upper limit of movement. When the tube 66 is pushed downwardly by a plate on the spray head at the top of the tube, the lower end of the tube 66 moves downwardly until it comes in contact with the washer 103 in the piston 82. Further downward movement of the tube 66 pushes the piston 82 downwardly and forces soap solution into the tube 97.

Soon after the piston 82 begins to move, the port 121 in the tube 66 reaches the upper end of the port 120 and water flows from the upper water chamber 136, through ports 107 into the upper end of the cylinder 81, and then through the

ports

120 and 121 into the tube 66. During continued downward movement of the tube 66 and the piston 82, soap solution from below the piston 82 is injected into the stream of water flowing from the

ports

120 and 121 upwardly through the tube 66. Thus a soapy water is supplied to the spray head at the upper end of the tube 66 while the tube is being pushed downwardly.

When the plate has been brought into contact with the scrubbing brushes, and further downward movement of the tube 66 has stopped, there is no further supply of soap solution to the water stream; but the soap already on the plate is used by the brushes for scouring the surface of the plate. The continued flow of water from the

ports

120 and 121, upward through the tube 66, dilutes the soap solution and carries away the material which is scrubbed from the plate by the brushes. During the time that the plate is in contact with the brushes, the port 121 is located near the lower ends of the elongated ports 120 in the sleeve 111.

As the piston 82 moves downwardly, it uncovers the cylinder ports 106, but this supplies no water to the passages 79 because there is no supply of water to the space above the piston 82 until it has moved down wardly to the level of the ports 105. When these ports are uncovered, water flows from the inlet connection 78 through the ports 105, through the space in the cylinder 81 above the piston 82, and out through the ports 106 to the passages 7? which supply the nozzles at the top of the dishwasher shell.

It will be apparent that the supply of water to the passages 79 can be prevented by not pushing the tube 66 down far enough to cause the piston 82 to uncover the ports 105. In the preferred construction, the plate on the spray head comes into contact with the scrubbing brushes before the piston 82 uncovers the ports 105. The dishwashing machine can be operated, therefore, without ever supplying water to the passages 79; but if top of the it is desired to use the nozzles which the passages 79 supply, a final downward movement is imparted to the tube 66 and the bristles of the brushes have ample flexibility to permit the corresponding downward movement of the plate.

When pressure on the plate is released and the tube 66 moves upwardly again under the influence of the spring 68, clear water is supplied to the tube 66 as long as the ports 121 are travelling along the .ports 120. When the tube ports 121 pass beyond the upper end of elongated ports 120, the supply of rinsing water to the tube 66 is shut 01f.

During the upward movement of the tube 66, the spring 92 returns the piston 32 to its raised position, and this movement of the piston 32 draws a fresh supply of soap solution from the reservoir through the passage 88 and past the check valve 82. When the tube 66 and piston 82 have reached the upper limit of travel, the machine is prepared to wash the next plate. The movement of the parts is rapid and successive plates can be washed every three to five seconds.

Referring again to Figure 1, when glasses or tumblers are to be washed, they are placed in contact with the supporting head in the same way as a plate and they are pushed downwardly over the portion of the brush supported by the inner frame 55. The bristles supported from the inner frame scrub the inside surface of the glass, and the bristles supported by the outer frame 54 scrub the outside surface of the glass.

For washing pots and pans, the bristles 56 of the outer frame 54-are shaped, as illustrated, to fit into the pot or pan, and it is a feature of the invention that the outwardly extending bristles from the frame 54 are of substantial length so that they can be distorted to take the shape of pets and pans of widely different size and contour. The water sprayed across the inside surface of the down-turned bottom of a glass, pot or pan, runs down the sides and provides first the soapy solution and then the rinsing water for cooperation with the outwardly extending bristles from the brush frame The preferred embodiment of the invention has been illustrated and described. Terms of orientation are, of course, relative. For example, the axis of rotation of the turntable, and the longitudinal axis of the supporting tube that carries the spray head, may horizontal; and the dish may be held against the spray head by horizontal pressure. Other changes and modifications can be made and some features can be used in different combinations without departing from the invention as defined in the claims.

I claim as my invention:

1. A dishwasher comprising a container having a top edge, a support extending upwardly from the container and having a top surface on which a dish or other article is placed, a water discharge conduit opening through said top surface and into depressed areas of the top surface which are spaced from the confronting surface of the dish or other article on the support, the depressed areas extending radially to the edge of the support whereby water from said discharge conduit is deflected by the dish or other article and is discharged radially outwardly across the surface of the dish or other article, bearing means in which the support is movable up and down, resilient means holding the support in a raised position, moving brush means with which the article contacts when the support is pushed downwardly, said brush means having bristles at its upper end and having all of said bristles terminating at a level lower than the top edge of the container, and valve means in position to be operated by the support for supplying water to the water discharge conduit when the surface of the article which rests on the supporting means moves downwardly to a level below the top edge of the container, the supporting means being long enough to operate the valve means before the surface of the article comes into contact with the brush 111631 5,

2. A dishwasher including a support having a top surface of limited area on which a plate orother article is balanced with a midportion of the area of the plate in contact with said support, bearing means inwhich the support is movable upwarly and downwardly; moving brushes for scri.ibbing the surface of the plate when the support is pushed downwardly to bring the plate in contact with the brushes, a water discharg conduit comprising a unitary structure with the support and movabl'e upwardly and downwardly with the support and having its outlet end adjacent to the top of the support and in position to direct water against the plate or other article at a location that moves downwardly as the article and support move downwardly, valve means for controlling the supply of water to the discharge conduit, the valve means being in position to be operated by the support when the support is pushed downwardly below a predetermined level, the supporting means being long enough to operate the valve means before'the' top sur' face of the support reaches the level of the brush means.

3. A dishwasher including a support having a top surface on which a plate or other article is held with the surface to be washed in contact with protuberances on the support, bearing means on which the support is movable upwardly and downwardly, movable brush means with which the plate comes into contact when the support is moved downwardly below a predetermined level, said brush means having bristles at its upper end and having all of said bristles terminating at a level lower than the top edge of the container, a container for soap solution, the support having an opening therethrough in a surface of the support lower than the tops of the protuberances and opposite the surface of the plate that contacts with the protuberances whereby water discharged through said opening is deflected by the plate and discharged between said protuberances and radially across the under surface of the plate, valve means operated by the support to supply water to the opening in the surface of the support when the support is moved downwardly to a predetermined level, and means for supplying soap to the under surface of the plate including a soap dispenser and means by which the soap dispenser is operated in response to downward movement of the support.

4. A dishwasher including a support having a top surface on which a plate or other article is held with the surface to be washed in contact with protuberances on the support, bearing means on which the support is movable upwardly and downwardly, rotary brush means with which the plate comes into contact when the support is moved downwardly below a predetermined level, a container for soap solution, means for spraying water against the under surface of the plate, valve means operated by the support to supply water to the spraying means when the support is moved downward to a predetermined level, a soap dispenser nicluding a reciprocating supply pump which is moved by said support during the downward movement of the support to eject soap solution into a stream of water flowing to the spray means, and a spring that operates the soap pump at its return stroke during upward movement of said support.

5. A dishwasher including a support which comprises a vertically extending tube with a flange at the upper end of the tube on which a plate or other article is held with the center portion of the plate in contact with the flange, part of the face of the flange being at a lower level than other parts and confronting the surface of the plate but spaced therefrom, a water discharge conduit opening through that part of the face of the flange which is spaced from the plate, and the face of the flange having areas spaced from the plate and extending radially from the part of the face through which the water discharge conduit opens whereby water from said discharge conduit is deflected by the plate and is dischargedv radially outwardly across the surface of the plate, bea1:

estates 8 ing means in which the tube is movable axially, a hub assembly in which the bearing means are contained and into which thetube telescopes when it moves axially and downwardly, valve means operated by the support and controlling the flow of water to the discharge conduit, the valve means being in position to be opened when the support is depressed below a predetermined level, a-soap solution dispenser for supplying soap solution to the discharge surface in the support, said soap solution dispenser: being operated or controlledby movement of the support and located in position to be actuated by the support during at least apart of the downward movement of the support;

6.. A dishwasher including. a vertically. extending tube having a sptiayhead. at its. upper end, the sprayhead having, a. top surface with a: group of. low protuberances by which. a downturned; surface. of a. plate is supported with clearance passages bounded. by the. plate,. theprotuberances, and they ,topsurface; of the, sprayhead, bearing means in; which the tube is movable axially, a hub assembly into which. the tube telescopes, a conduit for spraying water against the downturned surface of the plate inward ofv said protuberances for discharge through said clearance. passages and radially across the downturned surface of the plate, and. other conduits for spraying water against. the upturnedi surface of the plate, valve means for. controlling the supply of. water to the conduits, said valve. means. being in position to. be operated by a predetermined downward movement for supplying water to the conduits for the downturned surface of theplate,

and by a greater predetermined downward movement for supplying water to the conduits for the upturned surface of the plate.

7. A dishwasher including a vertically extending tube having a top surface with a group of protuberances by which a downturned surface of a plate is supported, said top surface having an opening therethrough communicating with said tube, and radially directed outlets through the spaces between the protuberances when a dish is against the protuberances, the support being vertically movable and having resilient means urging it into a raised position, a hub assembly into which at least a portion of the tube telescopes when moved downwardly, valve means operated by the support to supply Water. to the support for spraying against the downturned surface of the plate, said valve means being in position to be operated by downward movement of'the tube beyond a predetermined level.

8; The dishwasher described in claim 7 characterized by a constructionin which the water is sprayed against the downturned surface of the plate by a sprayhead located at the topof the support tube with a stern of the sprayhead extending downwardly into the tube, and further characterized by a compression spring which constitutes the resilient means for urging the support into a raised position.

9. A dishwasher including a container which is opened at the top and which hasside walls with upper portions that converge to-provide an' inward slope for the sidewalls for directing impingingwater sprays downwardly into the container, a support comprising a vertically extending tube with bearing means in which the tube is movable upwardly and downward1y, a spring that holds the tube in a raised position with the upper end of the tube extending above the level of the side wall of the container, a sprayhead at the top of the tube with a top surface having a group of upwardly extending protuberances for supporting the downturned. surface of a plate Whichis to bewashed and; betweenwhich water is sprayed radially across the plate on the protuberances, passages through which water is supplied to: the sprayhead, and valve means commanding the passages, said valve means being in position-to be operated by downward movement of the tubebelow a predetermined level.

10. A dishwasher including-a container which is open at the top and which has side walls with upper portions that converge to provide an inward slope for the side walls for directing impinging; water sprays downwardly into the container, the said wall'being of composite construction with the lower portion of the side wall permanently connected with the bottom of the container, and the upper portion of the side wall comprising a shell which is detachably connected to the lower portion of the container by a telescoping slip joint, a support comprising a vertically extending tube with bearing means in which the tube is movable upwardly and downwardly, a spring that holds the tube in a raised position with the upper end of the tube extending above the level of the side wall of the container, a sprayhead at the top of the tube with a top surface having a group of upwardly extending protuberances for supporting the downturned surface of a plate which is to be washed, a passage through which water is supplied to the sprayhead, and valve means commanding the passage, said valve means being in position to be operated by downward movement of the tube below a predetermined level.

11. The dishwasher described in claim 9 characterized by a plurality of nozzles located around the side wall of the container and directed inwardly and downwardly in position to supply jets of water against the upper surface of a plate which is resting on the support while the support is near its downward limit of movement, and further characterized by valve means operated by [the downward movement of the support for supplying water to the nozzles when the support is moved downwardly below a predetermined level.

12. A dishwasher including a support on which a plate is placed preparatory to washing, a water discharge conduit opening through an area of the top of the sup port that is spaced from the surface of the plate on said support, the spaced area having portions extending radially whereby water from said conduit is deflected by the plate and discharged across the spaced area and adjacent to the top of the support for spraying water radially across the downturned surface of the plate, the support being movable upwardly and downwardly with the plate thereon, nozzles located at angularly spaced regions around the support and radially outward therefrom in position to direct jets of water against the top surface of the plate when the plate and support are in a lowered position, passages through which water is supplied to the sprayhead and to the nozzles, and valve means commanding said passages and operated by downward movement of the support to supply water to the sprayhead and to the nozzles.

13. A dishwasher including a support on which plate is placed preparatory to washing, a sprayhead adjacent to the top of the support for spraying water radially across the downturned surface of the plate, the support comprising a vertically extending tube which supports the sprayhead at the upper end of the tube, a hub assembly in which the tube moves upwardly and downwardly with a telescoping movement and with the plate on said support, nozzles located at angularly spaced regions around the support and radially outward therefrom in position to direct jets of water against the top surface of the plate when the plate and support are in a lowered position, passages through which water is sup plied to the sprayhead and to the nozzles, and valve means including ports in the side walls of the hub assembly which are uncovered by downward movement of the tube, the ports for supplying water to the sprayhead and to the nozzles being at different levels and positioned so that water is supplied to the sprayhead before it is supplied to the nozzles during downward movement of the tube.

14. A dishwasher including a support on which a plate, glass, kettle or other article is placed preparatory to washing, the support having a top platform of limited area on which the plate is balanced and held while being ill washed, the support being movable up and down and having resilient means for holding it in a raised position, rotary brushes for scrubbing the plate when the support is pushed downwardly far enough to bring the plate into contact with the brushes, said brushes including an inner brush shaped to contact with the inside of glasses and tumblers, and said brushes having upwardly extending bristles for scrubbing the downturned surface of the plate, and having outer bristles which extend outwardly and upwardly and which are of substantial length for fitting into the corners of kettles placed on the support and pushed downwardly over the brushes, and means for supplying Water to the downturned and inside surfaces of the articles on the support.

15. The dishwasher described in claim 14 characterized by rotary brushes which include an inner brush shaped to fit the inside of glasses and tumblers, and an outer brush having upwardly extending bristles and then outwardly and upwardly extending bristles, the brushes being of short circumferential extent and the inner brush being angularly ofiset from the outer brush by a substantial angle, and motor means connected with the brushes for rotating them about a substantially vertical axis.

16. A dishwasher including a turntable, means for rotating the turntable, a support on which a dish is placed preparatory to washing and with the surface to be washed turned downward, the support being movable upwardly and downwardly with respect to the turntable, and having spring means for holding it in a raised position, rotary brush means with which the plate is brought into contact when the support is pushed downwardly below a predetermined level, the turntable having a non-circular hub, and a hub of the brush means having complementary non-circular surface which fits into telescoping relation. with the non-circular hub to provide a driving connectionbetween the brush means and the turntable free of fastening means and from which the brush means can be freely lifted to remove them from the dishwasher.

17. The dishwasher described in claim 16 characterized by a turntable which is a sheet metal element having a downturned rim of one-piece construction therewith, and further characterized by a motor located under the turntable and Within the circumferential limits thereof, a driving wheel in contact with the inside of the downturned rim for rotating the turntable, and motiontransmitting means including a speed reduced connecting the motor to the driving wheel that contacts with the downturned rim of the turntable.

18. A dishwasher including a container having an open top, a support extending upwardly adjacent the vertical axis of the container with a top surface having protuberances on which a plate is balanced and held in position for washing, a sprayhead adjacent to the top of the support, the support being movable upwardly and downwardly, resilient means urging the support'into a raised position, brush means in the container, a turntable in the container below the brush means, a driving connection on the turntable and on which the brush means rest for transmitting rotation of the turntable to the brush means, the container having an outer wall at a substantial distance from the turntable and which extends above the turntable, and the container having an inner wall below the turntable and of substantially less diameter than the outer wall to provide an annular channel between the walls for catching waste water of the dishwasher, a soap solution chamber enclosed by the inner wall, a motor in a closed casing in the soap solution chamber, a hub assembly which includes a bearing on which the turntable turns, bearing means in the hub assembly in which the plate support is vertically movable with a telescoping movement into the hub assembly, motiontransmitting connections between the motor and the turntable, valve means in the hub assembly in position to be operated by downward movement of the support 11 V to supply water to the sprayhead when the support is pushed downwardly in the hub assembly for a predetermined distance, and a soap solution dispenser connected with the soap solution chamber and controlled by downward movement of the support.

19. A dishwasher including a container open at its upper end, support for an article to be washed, the support being movable upwardly and downwardly, rotary brush means with which the article to'be Washed comes into Contact when the support is pushed downwardly, a turntable in the container, the container having outer wall extending downwardly from the upper edge of the container to a level substantially below the level of the turntable, and an inner wall extending from below the turntable to enclose a chamber under the turntable and to form with the outer wall an annular channel for 12 waste water, and a downwardly extending rim around the periphery of the turntable, said rim extending down- Wardlyat least as far as the top of the inner Wall to shield, against splashing water, the space located under the turntable and above the chamber enclosed by the inner wall.

References Cited in the file of this patent UNITED STATES PATENTS Robinson Apr. 23, 1895 576,066 Lippincott Jan. 12, 1897 1,662,205 Parry Nlar. 13, 1928 2,253,539 Steinhilber Aug. 26, 1941 FOREIGN PATENTS 64,6232 Switzerland of 1913