US1559727A - Dishwashing machine - Google Patents

Description

H. E. MERSELES ET AL Nov. 3, 1925.

DI SHWASHING MACHINE Filed 001:. 9, 1919 5 Sheefs-Sheet 1 Nov. 3, 1925. 1,559,127 H. E. MERSELES ET AL DISHWASHING MACHINE 5 Sheets-Sheet 2 Filed Oct. 9, 1919 'era 6(- Ma real W- 3am? WWW Filed Oct. 9. 1919 Nov. 3, 1925.

H. E. MERSELES ET AL DISHWASHING MACHINE Nov. 3, 1925.

H. E MERSELES ET AL DI SHWASHING MACHINE Filed Oct. 9, 1919 5 Sheats-Sfieet 4- fT/VBcmm Nov. 3 1925.

H. E. MERSELES ET AL DISHWASHING MACHINE Filed Oct. 9, 1919 5 Sheets-Sheet 5 m Mm ea M5 5W HF Patented Nov. 3, 1925.

UNITED STATES PATENT OFFICE.

HERBERT E. MERSELES, OF JERSEY CITY, NEW JERSEY, AND FRANK W. BEMM, OF

WILMETTE. ILLINOIS; SAID IBEMH ASSIGNOR DISHWASHING MACHINE.

TO SAID MERSELES.

Application filed October a, 1919. Serial No. 329,533.

To all whom it may concern:

Be it known that we. HERBERT E. Man; SELES and FRANK W. BEMM, citizens of the United States, residing in Jersey City, New Jersey, and Wilmette, Illinois, respectively, have invented new and useful Improvements in Dishwashing Machines, of which the following is a specification.

This invention relates to mechanical dish washers, and among its objects are to provide in a dish washing machine improved washing mechanism; to provide means for regulating the flow of water to the washing mechanism; to provide for the rinsing and sterilizing of dishes within the machine after they are washed; to improve upon the structure of existing sprayer nozzles; to improve upon the means of access to the interior of the machine; improved means for supporting the dishes adjacent the doors of the machine; to improve in general upon the structure of existing dish washing machines; and such further objects, advantages, and capabilities as will later more fully appear.

In the annexed drawings showing a prcferred embodiment of our machine:

Fig. 1 shows a sectional elevation of the same, substantially along the plane indicated by the line 11 in Fig. 2.

Fig. 2 is a sectional plan view of the structure shown in Fig. 1, substantially along the plane indicated by the line 2-2 in Fig.1, showing the doors in section and the section taken through the openings in the walls of the washing chamber.

Fig. 3 is a vertical section of one of the rotatable washing arms substantially along a plane indicated by the line 33 in Fig. 4.

Fig. 4; is a plan view of one of the washing arms such as shown in Fig.

Fig. 5 is a view, partly in section and partly in elevation, of a fluid distributing pipe, a force feed means and a sprayer arm connected thereto.

Fig. 6 is a plan view of the fluid control means used in the fluid feed pipe.

Fig. 7 is a view, partly in section and partly in plan, ofa rinsing and sterilizing attachment and the fluid pipes leading thereto.

Fig. 8 is a sectional elevation of a sprayer head used in connection with the structure shown in Fig. 7, the section being taken substantially on the line 88 of said figure.

Fig. 8 is a longitudinal section of the sleeve forming part of the bearing for the fluid distributer shown in Figs. .8 and 9.

Fig. 9 is an inverted sectional plan of the fluid spraying element shown in Fig. 8. Fig: 10 is a longitudinal section along the line 1010 in Fig. 11, of a steam injector used for heating the wash-water.

Fig. 11 is a plan view of the structure shown in Fig. 10.

Fig. 12 is a vertical section of the valves and weir used in the wash water tank.

Fig. 13. is 'an elevation showing the counter-weights used in connection with the vertically sliding doors of the washing chamber.

Fig. 14 is a horizontal section along the line 1414 of Fig. 13.

Fig. 15 is a vertical section along the line 1515 of Fig. 13.

Fig. 16 is a somewhat enlarged vertical section' of the burner-inclosing box and the burner shown in Fig. 1.

Fig. 17 is an enlarged detail of one end of'a track for supporting a dish rack, together with the means for supporting this grack uponea wall of the washing cham- Fig. 18 illustrates a modification of the overflow weir.

Fig. 19 shows a modification of the means for lifting the weir.

Fig. 20 is a plan view of one of the strainer pans.

This machine may be considered as comprising a washing machine casing A, a washing mechanism B, a wash water outoif mechanism C, a rinsing and sterilizing mechanism D, a wash water tank valve and overflow weir E, a door counterbalance mechanism F, a burner-box and door closer G, dish-rack supporting shelves H, and a steam wash water heater I.

The container A comprises a top 1, back 1, doors 2, -3, and 4, supporting legs, and enclosing wallsv as necessary to complete sucha structure. The doors are vertically slidable within guideways in the corners of the washing chamber, within which corners are filling pieces which serve to provide space within which the doors may slide. These doors are connected to flexible ele ments 5, 6, and 7, which pass over frictionreducing means attached to the top 1 and have their opposite ends connect-ed to counterweights 8, 9, and 10 at the back of the machine. Preferably these flexible ele-' ments are chains, but other equivalent means may be substituted therefor.

The detail structure of the counterweight weight and also has an opening extending from the top to the first-named opening, through which openings the ends of the chains may be passed and then brought up through a groove in one face of the weight to be attached at the top by any suitable means, as, for example, a bolt threaded into the counterweight, the bolt heads being shown in Figs. 13 and 15. These counterweights and the doors connected thereto may be'operated independently by not having them connected, but it is preferred usually to have two or more of the counterweight's connected by a cross-bar 11, which is secured to the counterweights by means of bolts 12 passing through openings in the bar 11 and into threaded openings in the respective 'counterweights. There are provided guide-rails 13 upon which the counterweights may slide vertically, thereby preventing any lateral swinging of the weights when the machine is being moved from one place to another. It will be seen in Fig. 13 that the weights 8 and 10, connected respectively to doors 2 and 4, are connected so that when one of these doors is raised, its counterweight and the connected counterweight will descend, thereby lifting the door on the opposite side from the one which is actnat-e .l. If, however, the machine is placed in a corner where two of its sides will be covered so that door 3 and one of doors 2 and 1 will be exposed, then counter-weights 8 and 9, or 9 and 10 may be connected, if desired, so that the opening of one of the doors opens the other one which is connected thereto through the counterweights, bar 11, and the chains 5, (3, and 7. As indicated above, if it is desired to have the doors operate independently, this may be done by removing the bar 11 or disconnecting it from all but one of the counterweights.

The door arrangement and connection just described is important since it permits access to all three exposed sides when the machine is placed along one wall away from a corner and the connection and operation of the doors in any relationship, and also because it permits connection and operation simultaneously of the vtwo exposed doors when the machine is placed in any corner. It assists in reducing the amount of space necessary for a machine of this character, which is very desirable in places where a small amount of space is available, as, for example, at a soda fountain.

the water tank, and from there into the pump. In this connection, attention is called to the fact that the bottom 16 slopes toward valve 17 so that the valve will be at the lowest point of the bottom and will therefore drain all the water from the tank.

The strainer pans may be constructed in different ways but it is preferred that a sheet of metal be stamped out in the form shown in dotted lines in Fig. 20 and alarge part of the body part perforated as shown. The strainer pans 16*, 16, 16 are similar in construction so it will only be necessary to show one of them.

To form the pan shown in Fig. 20, a sheet of metal is stamped out in the form shown in dotted lines and perforated over the entire portion shown within the solid lines except a marginal strip about -inch wide. lateral portions 16 then have their ends bent up at substantially a right angle and said lateral portions are themselves then bent up to form the sides of the pan, the ends being next bent up to engage the bent over ends of the lateral portions and the overlapping metal parts are secured together, as by spot welding, at the points 16 to close said corn ers and render the pan more rigid. In

The

Fig. 20 is shown an alternative construe tional detail in which the ends are bent up to place before the sides. A handle 16 is then secured to opposite sides of the pan, as by spot welding, at points 1G and 16 This handle may be made of a single piece of metal, half round, flat, or other desired shape, or it may be made of separate parts, separately joined to the pan sides. This construction of the pans renders them very rigid and durable and not easily spoiled accidentally.

After the pans have been constructed as above set forth, they are galvanized, which renders the entire surface oxidation resisting, which would not be true if the pans were made from galvanized metal and were not re-galvanized after they were structurally completed.

- Near one side of the tank 15 is located the wash water tank valve and overflow weir E, which comprises a valve member 17, the top of which is set substantially flush with the bottom of the tank and this valve member has secured thereto a flanged nut 18, between which and the valve member 17 the edge of the opening in the bottomof the tank is secured. If desired, a gasket may also be placed between these members in order to insure a perfectly tight fit to prevent drainage of water when the same-is not desired. The weir 19 has a bevelled end which fits into a correspondingly .bevelled portion of the valve member 17 so that there shall not be leakage of the water between these two members when the same is not desired. The top of this weir 19 is open so that when the water in the tank reaches a predetermined height, it will overflow and the presence of an undue amount of water in the tank will be prevented. The lower end of this weir is guided in its longitudinal motion by a bracket 21, secured to one wall of the'tank 15, while the longitudinal motion of said weir is caused by the operator actuating rod 22, which has one end secured near the top of the weir and its opposite end extending up adjacent one of the doors of the washing machine. There are secured to a wall of the tank 15, guide loops 2-3 and 24, which closely engage a flattened face or flattened faces of the rod 22 to prevent rotation of the same, thereby causing the weir 19 to move 1ongi tudinally without. any lateral tilting so that when it is lowered into position, it will always correctly engage valve member 17 and will not permit any leakage therethrough. This rod 22 is provided near its upper end with a notch 25, which engages the upper loop 24 to hold the same in elevated position when it is desired to drain the tank. The valve may be closed by merely taking hold of the hook 26 at the upper end of the rod and thereby pulling the rod laterally until the notch disengages loop 2-1, and then shoving downwardly until the valve is properly closed. \Vhen in lowered position. hook 26 is below the upper surface of track 27, on which the dish-supporting rack slides, but when in raised position so that valve 17 is open, hook 26 serves to prevent the dish-racks from being slid into the washing chamber. As shown in dotted lines in Fig. 1, the valve body 17 is ordinarily provided with a drain tube to carry oil water. This tube may be screwed to the valve body.

In order to prevent undue loss of Wash water. it has been found desirable to provide the weir or overflow pipe 19 with a cap as shown in Fig. 18. This is preferably done by sawing, milling, or otherwise forming on the end of tube 19 a plurality of posts 94, to the free end of which is secured a plate or cap 95. This may be secured in place by spot Welding, or otherwise, as desired. Other methods are contemplated, but this is believed to be the least expensive and most secure.

In the modified form of the weir, shown in Fig. 18, the plate 95 is provided substantially centrally with a hole through which slides a rod 96 having on its inner end an enlargement of any convenient form, as for example, a nut, The upper end of this rod is bent outwardly and then downwardly, as shown, to form ahandle wherebythe weir may be'lifted to drain the wash water tank.

lVhen the handle of rod 96 is lifted, the rod slides through the plate until the enlargement engages the late and lifts the weir to drain thewater f l om the tank. The purpose of this'handle is toenable one to lift the weir in order to drain the wash water tank without getting the hands in contact with the hot water in the tank. The weir is, of course, preferably provided with a guideway as shown in Fig. 12.

In the construction shown in Fig. 19, the weir is provided with av lever 97, having a cam head 98, by means of which the weir may be lifted or lowered merely by turning the handle from one side to the other, sufficient guiding surface being provided to insuil'e the proper seating of the tube in the va ve.

It may be noted at this point that plate or cover 95 may be used with any one of the three constructions shown; also that the cover may or may not overhang the sides of the tube 19. In either case, the cover will preventthe water dropping into the tank from falling through the tube into the waste.

There are provided a plurality of rods 27 and 28, constituting tracks, extending across the washing machine between the walls and substantially at the level of the bottom of the doors, so that the dish racks may be slid into the washing machine on these rods through any one of the doors and removed from the same or another door. The ends of these rods are bent substantially at right angles and pass through supporting loops 29 attached to the walls of the machine slightly below the bottoms of the doors. Furthern'iorc, these bent ends of the rods 27 and 28 are provided each with a pair of openings through which are passed cotter pins or the like, one above and the other below the loops 29. \Vhen it is desired to remove the tracks 27 and 28 in order to more easily get at the interior of the washing machine,-this may be done by removing the lower cotter pins and lifting the tracks upwardly, whereupon they may be taken out. It is considered preferable to have one set of these rods 27, 28 bent downwardly to form troughs in which the other set rests so that the tops of the rods are flush, but they may be integrally joined, if desired, without substantial bending so as to form a unitary structure.

The dish-rack supporting tables H comprise supporting members or tables 31 pivotally connected by means of joint 30 to the walls of the machine. The outer ends of these supporting members are held u) by bracket members 32, hinged at their en s respectively to the supporting members 31, and the wall or framework of the washing machine. Accidental doubling of these members 32 is prevented by a latch 33 opposite the hinge in the middle of the said support. The bracket 32 and the support 31 are detachably connected to the washing machine so that the same may .be moved from one side to another of said machine. Regularly the machine is provided with only two of these dish-rack supporting tables, and it is therefore necessary to be able to move these from one side to another, as desired, depending upon where the machine is located with res ect to the walls of the room. If desired, owever, an additional table may be provided so that each of the three doors may have its own table. Then the doors are open, the dish-rack sup orting trays 34 may be slid on the tables and therefore into the washing machine. These racks are so constr cted as to hold the dishes separated and.

inc ined at the proper angle so that the dishes may be efiiciently washed. In Fig. 2, one of these tables 31 is shown in solid lines and the locations of the other one indicated in the dotted lines upon opposite sides of the machine. The second table mav be made to occupy either one of these dotted line positions. In ordinary use, it will not be necessary to remove either of the tables from position as it may be gotten out of the way when the machine is not in use by simply disengaging the fastener 33 and lowering the shelf or table 31 to the side of the machine.

The washing mechanism B will now be described. This has an intake pipe 36, and outlet 37, there being a forced feed means 38 arranged between these two pipes. Outlet pipe 37 is provided with a branched outlet 37, to which are connected pipes 39 and 40 leading to the washer arms 41 and 42 respectively. Interposed between the pipes 37 and 37 is water cut-off mechanism C to be described later. One of these washer arms will now be described, but since they are similar, a description of one of them will be sufiicient. For this purpose, reference will be had to Figs. 3 and 4, in which washer arm 42 is shown provided with sprayer apertures 43, 44, and 44, the latter being arranged near the middle of the length of the washer arm. The sprayer apertures are in the form of slots cut into integral approximately hemispherical protubcrances the shape of the latter imparting an arcuate form to the slots. By this arrangement the Water is discharged or projected from the slots in a fan-like form, so that the stream of wash water will be discharged over a very large area. This washer arm is held in place by means of a bolt 45 passing through an aperture in the arm and through an internally threaded boss 47 upon an elbow connccted to the end of pipe 40. Surrounding the a erture' in washer arm 42 is a recess, in WhlOh is seated a brass bearin member 46 provided to reduce friction tween the washer arm and the head of bolt 45. Opposlte this side of .the washer arm there is a bearing engaging a complementary bearing .mor or less around the axis of the arm, providing for a proper positioning of the spray apertures 43 to cause rotation of the washer arm upon its axis. The nozzle 49 may be mounted upon the arm 42 in any desired way, as shown in the drawing. Each nozzle is shown as provided with a bell-like flange which encloses a portion of the tubular arm 42 and is rotatably mounted thereon, being normally held against rotation by means of a set screw or the like.

It may be noted in connection with these washer arms that if the machine is not provided with doors, it will be necessary to have the sprayer apertures 43 arranged to aring is not intended to direct the water in a vertical plane and 1 therefore it will be necessary to cut the aper- -tures 44 at a slight angle in order that the reaction of the water may cause the washer arms to rotate.

Suitable supporting means 50 is provided for attaching the end of pipe 40 or the elbow connected thereto to the top of the machine. It may be noted that nosuch support is necessary for pipe 39 or the elbow connected thereto. Bolt 45 is screwed into boss 47 until the proper adjustment of sprayer arm 42 with respect to the elbow is secured, and then a set nut 45 is put upon the end of this bolt to hold the same in adjusted position.

As stated above, water cut-off mechanism C is located between pipes 37 and 37 and has a water-tight connection with the bottom wall 15 of the washing chamber, as shown best in Fig. 5. This water cut-off mechanism comprises essentially a body member 51 having therein a slot 52, in which slides valve 53, whereby an opening 54 through the body member may be opened or closed to permit or stop the flow of water through the pipe from the wash-water tank. This valve member provided with an operating rod 55, which, is connected at one end through an arm 56 to a vertical rod 57, the end of which is angular in shape and extends above the top of the washing machine where it is connected with an operating handle 58. It will be seen from Fig. that by moving the operating'handle 58 toward the left, valve member 53 will be pulled back to open the aperture through The pump 38 is of the well-known centrifugal type continuously operated by a suitable motor (not shown). When the flow through the pipe 37 is interrupted by the cut-off device, the pump continues to operate un hampered by the changed conditions in the load brought about by the shut off of the discharge. In other words the pump automatically accommodates itself to the changing conditions of load, and strain on the electric motor, due to constantly turning on and shutting off the current, is avoided.

The rinsing and sterilizing mechanism D is located partly below and partly-above the dish washing chamber and comprises a rotatable rinsing arm or sprayer head 60 below the dishes and a fixed rinsing tube or sprayer head 61 above the dishes. The arm 60 is connected to a water or steam supply tube 62, joined to the tube 63 by intermediate connections, hot water being supplied to these tubes through pipe 64, the opening from which to the pipes 62 and 63 is controlled by a valve 65. The rinsing and sterilizing tube or head 61 is generally cir cular in form and is provided on its under face with sprayer nozzles 66, shown in detail in Fig. 8. These sprayer nozzles comprise each a longitudinally apertured body, externally screw threaded for a portion of its length, having an apertured yoke member connected thereto and extending opposite one end of the aperture in the body member. In the aperture of the yoke member, opposite the said aperture in the body member there is a screw threaded opening in which is mounted a screw 69, the forward end of which is reduced in diameter and is unthreaded, and terminates in a rounded end 70. Upon this unthreaded end or spindle is mounted a sleeve 71, having a longitudinally cylindrical aperture 71 (terminating internally in a conical end) and a conical end 71 and carrying the rotatable fluid distributing member 72.' On opposite sides of the sleeve 71 (see Fig. 9) are grooves 73 which extend. part way from the outer end toward the end adjacent the body member, and into these grooves are indented portions of the distributing or spreader member to prevent the same from rotating relatively to the sleeve 71. However, the fit between members 71 and 72 is not so close but that there may be some longitudinal play as well as there being lon itudinal and lateral play between the spin le 70 of y the screw 69 and the sleeve 71. This provides a suflicient amount of looseness for rotation, but the spreader member 72 is prevented from being lost by reason of the fact that there is not sufiic ient room between the spindle 70 and the body portion 67 for the distributing member to come out between these parts. The conical surface within the sleeve 71 resting upon the spherical surface 70 results in little friction between these parts and there is also very little wear at this point.

The screw 69 is held in adjusted position by suitable means, as, for example, the set nut 69' shown. The spreader member, as shown in Fig. 9, is made from a single sheet of metal doubled and shaped so that the {wings are of double thickness. This body portion is pressed snugly around the sleeve 71 and fits closely its conical surface 71 with the result that-the water. spreader-172 .comes practically to a point where the wings intersect and the water is divided and thrown evenly on the different wings, which are straight for a distance from their narrower end and are then evenly curved to their wider end, which. makes an angle approximately 60 with the straight part, giving a maximum reactive effect for producing rotation and also causing a full and efficient spreading of the water whereby the dishes are thoroughly washed.

The tube 61, at one end 74:, is connected .to a pipe, the opening through which is controlled by a valve 75. To the opposite end of this pipe is connected a T-coupling 76, the other two openings of which are respectively connected to steam inlet pipe 7 7 and steam outlet pipe 78, the latter being controlled by a valve 79. Connected to the pipe 78 by elbows 80 and 80 is a down pipe 81, which is connected to ipe 82 in the bottom of the wash water chamber by a T-coupling 83 and a steam injector 85. The T has a lateral opening 84 and the injector pipe 85 extends through one end of the T, a tight connection being made between the two by a packing held in place by means of gland 86. In this connection, it is noted that in order to prevent water hammer effect, it has been found desirable to have the injector pipe 85 extend a short distance beyond the lateral aperture 84. At the other end, pipe 82 is provided with an elbow 87 to cause circulation of the water in the tank 15 without the water being driven directly against the adjacent wall of the tank. This elbow may be 90, 180, or of other suitable angle.

The door and counter weight mechanism G is connected to a heater box 90, surroundplied by a tube 89. The opening in this box 90, whereby access may be had to the burner to light the gas, is closed by a door 91, to

which is connected a counterweight 92 by means of a bar or other suitable structure 93. When the door has been opened, if it is released, the counterweight 92 will drop, causing the door to close. Because of this structure, the user of the machine will be unable to leave the door open, which is undesirable. It has been found in ractice that the springs used in such locations for closing of doors would not retain their resiliency because of the heat absorbed by the metal surrounding the burner and thereby transmitted to the springs. For this reason, it was necessary to devise a construction whereby, the door would automatically close when released.

If a supply of live steam is available, the same may be connected to pipe 77 and the steam used to heat the Water in the wash water tank 15 as well as for the purpose of sterilizing the dishes in the wash chamber. If, however, there is no source of steam, the water may still be heated by means of the gas-burner 88, the heat from which is transmitted through the corrugated bottom 16 of the tank 15.

In use, the operator closes the drain valve in the bottom of tank 15 if the same has been left open, and then fills the tank with water which is hot, or is then heated. \Vhen the water is hot, one or more doors are opened and the dishes are placed in the washing chamber in the proper position to be washed. After this, the doors are closed and the pump 38 is set into operation, whereupon water will be pumped from tank 15 through delivery pipes 37, 37', 39, and 40 to the Wash arms 41 and 42 (assuming the cut-oil valve 53 to be open). On account of the inclination of openings in arms 41 and 42, these arms will be caused, by the reactance of the water, to rotate and thereby distribute water upon all portions of the dishes placed in the chamber. Soap may be introduced in any form or in any manner desired-soft, shavings, powder, cake,

etc.-in the wash water tank 15 or else-' where. When the dishes have been sufliciently washed, the pump may be stopped or not, as desired (but ordinarily it is not stopped), and valve 65 opened, whereupon hot water from a hot water tank or other source of hot water supply will be admitted through pipes 64, 63, and 62 to the rinse arm (similar in construction to wash arms 41 and 42) and to 'the'rinse tube 61. When the pump 38 is not stopped, the flow of water may be stopped by closing valve 53.

If it is desired to sterilize the dishes also, valves 7 9 and 65 being closed, valve 7 5 will be opened and steam ermitted to enter through pipe77 and T 6 into the rinsing and sterilizing tube-61 and pipes 63, 62, and

arm 60. Tho valve 79 may be closed during thesterilizing of the dishes, it is not necessary that it should be, and, in fact, it is usually left slightly open so that steam'may continue to flow through the injector to heat the water in the tank.

It should be noted, perhaps, that rinse arm 60 may or may not be provided with the adjustable ends 49 and the lateral sprayer openings 44. In the event that the adjustable ends 49 are not provided, it will be necessary for a portion or all of the slots to be milled at an angle so as to cause rotation of said .arm.

It is noted that it is possible to substitute for some of the washer or sprayer arms or heads shown hollow disks provided with the necessary apertures for the spraying of fluid (liquid or otherwise) upon the dishes.

By the use of the Words bearing bearings bearing surface etc., with relation to the bearing 48, it is not intended to convey the idea that this bearing surface must necessarily carry the weight of the rotatable element, as this is not true of arm 42, in which case the bolt 45 and brass bushing 46 carry the weight of the rotatable arm.

While we have described in detail the con struction and operation of our machine, it is of course understood that such description is merely for the purpose of explaining what we consider at present a preferred embodiment of our invention, and is not to be considered in a limiting sense, as we desire to protect all structures coming within the spirit of our invention and the appended claims.

Having now described our invention,

-VVe claim:

1. In a washing machine, the combination of' a rotary projector, comprising an integral tubular member forming a pair of diametrically opposite radial arms and having an inlet opening in one side intermediate its ends, a plurality of hollow bosses projecting from its opposite side and each containing a discharge slot extending radially to the axisof rotation of the projector, means for supporting the articles to be washed about the axis of the projector at the side of the projector opposite to its inlet opening, and means for forcing a washing medium into the projector through its inlet opening so that it, is directed through the slots of the projector against the articles.

2. In a washing machine, the combination of a casing having openings in two of its vertical walls, continuous tracks fixed in the casing and extending across it from one opening to the other, a supply conduit extending vertically upward outside said tracks, branch conduits located respectively above andbe'low said tracks and extending from said supply conduit to points on a ends of said branch conduits respectively so as to rotate about said vertical line.

3. In a washing machine, the combination with a support for the articles to be washed, of a supply conduit having its outlet opening near the middle of the support, and means for distributing washing fluid. supplied through said conduit over the articles, comprising a wash arm having discharge openings directed towards the. support and having an axial intake opening rotatably mounted on the discharge opening of the conduit. and a pivot pin extending between the conduit and the wash arm and serving to center the arm on the discharge opening of the conduit.

4. In a washing machine,.the combination with a support for the articles to be washed, of a supply conduit having its discharge opening near the middleof the support, and means for distributing washing fluid supplied through said conduit over the articles, comprising a wash arm having on one side an axial intake opening rotatably mounted on the discharge opening ot the conduit and having on itsothcr side a plurality of discharge openings and an axial hole, a pin tixed in the conduit extending through said axial hole in the wash arm and having a. running bearing in said hole, and means on the outer end of said pin engaging the outer side of the wash arm to restrain movement of the arm toward the. article support under the pressure of the washing fluid supplied through the conduit.

5. In a dish washing machine, the combination of a casing containing a support for the articles 'to be washed and a rinse distributor and a wash distributor, means without the casing for intermittently supplying rinsing tluid to the rinse distributor, a reservoir below the casing containing washing fluid, a conduit connecting the reservoir with the. wash distributor, a. power driven centrifugal pump arranged to force the washing fluid through said conduit, and quick-acting cut-oft means controlling the flow of fluid through said conduit so that during the operation of the rinse distributor the Washing fluid may be cut off without stopping the pump.

6. A dish washer comprising a dish washing compartment, doors at the sides and front of said compartment, a dish rack support ad acent a door, a dish rack support in said compartment, said supports comprising track members operable to guide the sliding of the dish rack into and out of said conniartn'ient through any of said doors, and mechanism for supplying washing streams into said compartment.

In witness whereof, we hereunto subscribe our names to this specification.

HERBERT E. MERSELES. FRANK W. BEMM.

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