US2063746A - Washing machine - Google Patents

Description

CLEANING AND LIQUID CONTACT WITH SOLIDS Dec. 8, 1936. D. A. MEEKER WASHING MACHINE Filed NOV. '3, 1.950

7 Sheets-Sheet 1 ATTORNEY INVENTOR and a CLEANING AND LIQUID 7 \JiJii'BblB uumu; CONTACT WITH SOLIDS Dec. 8, 1936. D. A. MEEKER 2,063,746

WASHING MACHINE Filed Nov. 5, 1950 7 Sheets-Sheet 2 50 2 I :(rgEN oR E mw m ATTORN EY CLEANING AND LIQUID CONTACT WITH SOLIDS Dec. 3, 1936. D. A. MEEKER 2,063,746

WASHING MACHINE Filed Nov. 3, 1930 7 Sheets-Sheet 3 'I I I1 iwemog Fig. 4 BY 9*)1/1/ ATTORNEY D I U Q I L D N A ,G N I N A E L C A no 1 CONTACT WITH SOLIDS Dec. 8, 1936. D. A. MEEKER WASHING MACHINE Filed Nov. 3, 1950 7 Sheets-Sheet 4 INVENTOR 6M qha'z ATTORNEY 8 154:. CLEANING AND LIQUID CONTACT WITH SOLIDS Dec. 8, 1936. D. A. MEEKER WASHING MACHINE Filed Nov. 3, 1930 7 Sheets-Sheet 5 INVENTOR flwd a www h ATTORNEY 154. CLEANING AND LIQUID CONTACT'WITH SOLIDS Dec. 8, 1936.

D. A. MEEKER WASHING MACHINE '7 Sheets$heet 6 Filed Nov. 3, 1930 l lllll 'l lllllllllll ulllllllilul E I 2J7 200 INVENTOR 9nd Z ATTORNEYS Figl6 I BY 154. CLEANING AND LIQUID CONTACT WITH SOLIDS Dec. 8, 1936. D. A. MEEKER WASHING MACHINE Filed Nov. 3, 1950 7 Sheets-Sheet 7 Y INVENTOR BY I 9 ml ATTORNEY-5 A ///////VW Patented Dec. 8, 1936 UNITED STATES PATENT OFFICE WASHING MACHINE David A. Meeker, Troy, Ohio, assignor to The Hobart Manufacturing Company, Troy, Ohio,

a corporation of Ohio Application November 3, 1930, Serial No. 492,915

27 Claims.

This invention relates to washing machines.

One of the principal objects of the invention is the provision of a washing machine of simple and compact construction which may be readily installed for use, is capable of rapid operation while requiring but little attention from the operator, and provides long life for the operating parts.

Another object of the invention is the provision of a washing machine having a compact pumping unit of few parts constructed to effectively prevent leakage adjacent the pump shaft.

Still another object of the invention is to provide a small and compact washing machine of this character, such as one particularly adapted for fountain, restaurant or domestic use, and

which is provided with a supporting table constructed to permit ready assembly, convenient and. easy operation, and to effectively restrain leakage from the assembled machine to give a cleanly and sanitary installation.

Other objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.

In the drawings, which disclose a preferred embodiment of the invention- Fig. 1 is an elevational view of a washing machine constructed in accordance with this invention; some of the parts being broken away for clearness of illustration;

Fig. 2 is a sectional view taken on the plane of the line 22 of Fig. 1;

Fig. 3 is a horizontal sectional view taken on the plane of the line 33 of Fig. 2;

Fig. 4 is a detail of the rotary wash arm;

, Fig. 5 is an enlarged vertical section taken on the plane of the line 55 of Fig. 1;

Fig. 6 isa fragmentary sectional view of a portion of Fig. 5, showing the parts in operating position;

Fig. 7 is a sectional view taken on the plane of the line 1-1 of Fig. 5;

, Fig. 8 is a fragmentary view in elevation of a portion of the pump impeller;

Fig. 9 is a detail view in elevation looking upwardly toward the motor switch and rinse valve;

Fig. 10 is a sectional view of the rinse valve and associated parts;

Fig. 11 is a detail view taken substantially on the line H-Il of Fig. l and showing the interlock between the cover member and the control shaft; the parts being shown with the cover closed and control member in neutral position;

Fig. 12 is a view similar to Fig. 11 and shows the control shaft in washing position;

Fig. 13 is a view corresponding to Fig. 11 and shows a control shaft in the rinse position;

Fig. 14 is a detail of the control shaft;

Fig. 15 is a plan view of the frame of the supporting table for the washing machine;

Fig. 16 is a plan view of the covered frame which provides a support for the washing machine;

Fig. 17 is a view in perspective of the washing machine and table assembled; and

Fig. 18 is a sectional detail of a portion of the wash arm and supporting member.

The drawings, in which like characters of reference designate like parts throughout the several views thereof, illustrate a washing machine having an open top tank H] comprising a washing compartment, and a well or sump II which is preferably formed as an integral part of the tank l0 to provide a reservoir for the collection of a quantity of wash water. The tank I!) is covered by a unitary casing or cover consisting of a fixed portion l3 which is attached to the tank, and a movable portion l5 which is pivoted from and is adapted to swing Within the fixed portion. The fixed and movable cover portions each comprise parallel plane surfaced side walls l3 and I5 respectively and curved walls l3 and 15 respectively of substantially semi-cylindrical form. Adjacent side walls of the portions are provided with pivot bolts l6 so that the movable portion l5 may be swung from an open position in which it is telescoped within the fixed portion to a closedposition in which it is extended from the fixed portion and, with the fixed portion, provides a water-tight enclosure for the open top tank Ill. The fixed portion has a lower edge which is attached to the tank top, and which cooperates with the top of a supporting table to provide a water-tight construction, and has an inturned lip IS on the under side of the curved wall adjacent the upper edge thereof. The movable portion I5 is provided with an outwardly extending flange l5 at the edge of the curved wall telescoped within the fixed portion which serves with the lip I3 to restrain the escape of liquid from between the cover portions. The placing of the pivot bolts I6 is such that the cover portions are not concentrically mounted but are offset an amount to permit the flange l5 to swing out of contact with the curved wall of the fixed portion of the cover until the cover is practically closed. Such an arrangement permits the movable cover to swing in a substantially friction-free manner until it closes over the tank 10 at which time the flange I5 comes into contact with the curved wall of the fixed cover to restrain the passage of washing water therebetween. Any small amounts of water that may pass beyond the flange are directed by the adjacently positon-ed lip I3 into the trough formed between the curved wall of the movable cover and the extending flange I5. Any water collecting here drains to one side or the other of the movable cover and then passes downwardly between the overlapping side walls of the cover portions into the tank 10.

The pivot bolts l6 are supported to provide free pivotal movement for the movable cover l5. Hub members l2 are provided on the side walls of the fixed cover and are positioned as by means of rivets on the turning axis of the cover. The hub members comprise metal plates having in wardly extending central bosses in which are provided axially aligned bolt holes. Similarly shaped hub members M are provided on the movable cover and are positioned with outwardly extending central bosses having aligned holes of such diameter as to receive a shouldered portion of the bolt 16. The length of the boss on each of the hub members M is greater than the thickness of the side wall Mia, and as the side wall I5a is fastened snugly to the flange of the member M, the side wall is thus held in spaced relation within the adjacent side Wall l3a of the stationary cover member. In addition, the length of the larger diameter portion of the bolt !6 between its head and the shoulder which abuts against the member I2 is greater than the length of the boss of the member I l, so that the shoulders of the bolt 16 may be drawn tight against the hub member 12 Without binding the member I i, thus providing a substantially friction-free pivotal mounting. The clamping engagement of the bolt shoulders on the members l2 effectively seals the bolt openings against passage of washing water to the exterior of the machine at this point.

A centrifugal pump IT is attached to the tank to provide a circulation of wash water from the well or sump II to suitable wash nozzles within the tank Hi and is mounted beneath the portion 1 0 and at the side of the well portion I l The pump is driven by an electric motor l8 which is supported from the housing of the pump. The pump and tank are provided with aligned openings; the central intake opening 26 of the pump communieating with the interior of the well I I through an opening l I, while the tangentially positioned discharge outlet 22 of the pump is aligned with a central opening 22 in the bottom of the tank portion l0 and is attached thereto by means of a threaded sleeve 23. A rotary wash arm 26 is suitably mounted for free rotational movement Within the tank l0 and is connected to the discharge of the pump to supply sprays of wash Water within the casing. The wash arm 24 has incorporated in it pipes and jets for the supply of rinse water. A suitable trackway 26 is provided within the machine for the reception of racks of dishes or other articles to be washed.

The pump [7 and motor l8 form a unit in which a common shaft 28 is provided. The shaft 28 carries the motor armature 29 at one end and has mounted upon its opposite end, within the pump housing, an impeller 33. The impeller, which comprises a disc-like member having suit able water circulating vanes provided thereon, is arranged so that it may move axially with respect to the pump housing; this movement being provided to aid in maintaining a water-tight joint at the point of entrance of the shaft 28 within the pump housing without the use of a stufflng box. The impeller is preferably fixed to the shaft 28 and is shown held to the shaft 28 by means of a key 3|, and by a nut 32 which engages the threaded end of the shaft. The housing 33 of the pump is preferably a casting of volute form having an open side, defined by the circular wall 34, which is closed by an extending portion 35 of the frame 36 of the motor. In assembling the motor and pump the impeller 30 may be attached to the end of the shaft 28 protruding from the motor, and the motor and assembled impeller may then be attached to the pump housing 33, as by means of bolts 38, to provide a compact pumping unit. The pumping unit is securely held to the tank It! by being bolted to the reservoir portion H, and also by being secured directly to the bottom of the tank 10.

The pump housing 33 is attached to the side wall of the reservoir H by means of the two screws 40 which are shown diametrically spaced one above the other, and is positioned so that the central intake opening 20 of the pump will coincide with the opening ll of similar shape in the wall of the reservoir II. A suction fitting 33 is attached to the inner side of the reservoir wall and is secured thereto in alignment with the opening 4| by means of the two screws 44 which are also diametrically spaced, and stand at right angles to the pump housing screws 40. Such an arrangement of attaching screws permits the parts to be readily assembled. The suction fitting is preferably a hollow casting of elbow shape having a passage opening downwardly and terminating a relatively short distance from the bottom wall 46 of the reservoir ll. Upon operation of the pump, wash water, which is maintained at a suitable level in the reservoir H, is drawn through the suction fitting 43 and communicating openings II and 2D to the interior of the pump for discharge from the pump outlet 22. Suitable means are provided for maintaining the wash water level in the reservoir and, as shown, comprise an overflow pipe or stand pipe ll in the form of a cylindrical tube having a tapered lower end portion 48 which is adapted to be received within a similarly tapered opening provided in a depending boss 89 formed in the bottom wall 46 of the well. The boss 49 terminates in a threaded connection 50 to which a suitable drain pipe (not shown) may be attached. The upper open end of the stand pipe 41 is provided with a suitable handle 5| by which the stand pipe may be grasped when it is desired to drain the reservoir by removing the pipe. During operation of the machine wash water is maintained in the reservoir at the level of the open upper end of the stand pipe. If the quality of water within the reservoir ll exceeds the level of the open end of the stand pipe 41, as by the addition of rinse water, the excess is drained away through the pipe 41 and carries with it any surface accumulation of grease or like substance that may have been washed from the dishes. The accumulation within the sump H of large particles of waste materials washed from the dishes is prevented by the provision of a suitable strainer 52 which is positioned to overlie the open top of the sump. The strainer is provided with a suitable lifting handle and is flared upwardly and outwardly at 53 adjacent the outer edges so as to form a receptacle of cup-like form having a 154. CLEANING AND LIQUID CONTACT WITH SOLIDS peripheral edge which is adapted to rest upon the bottom face of the tank l0 adjacent the sump.

At the end of the washing period when it is desired to clean the machine, the reservoir H is drained by simply removing the pipe 41 so that the liquid contained therein may flow freely through the connected drain pipe. Before again placing the machine into service the stand pipe 41 is placed in assembled position. Means are provided to aid in guiding the tapered end 48 of the pipe into the receiving socket of the member 49. As shown, the suction fitting 43 is provided with spaced ribs 54 which extend substantially vertically and define a curved face or channel 55 positioned in substantial alignment with the opening in the member 49. The pipe 41 may be readily positioned by lowering it within the reservoir until the end portion 48 comes into contact with the curved channel 55 whereby it is guided in its downward movement into the recessed Opening in the member 49.

The extending portion 35, which comprises an integral part of the motor frame, is provided with spaced disc- like walls 51 and 58. The wall 51 of the motor frame carries a bearing 59 for the support of one end of the motor armature 28; the other end of the shaft being supported by a bearing carried by the motor frame in the usual manner. The wall 58 is provided with a sealing member 60 to restrain leakage along the passage through which the shaft 28 passes for attachment of the impeller 30. The sealing member 60, which is of bronze or other suitable material, provides a free passage for the shaft 28 and is formed on the side of the wall 58 within the pump housing with an extending annular flange or face. Sealing means are provided within the pump housing to cooperate with the sealing member 60 and prevent the passage of leakage water from the housing along the shaft while the pump mechanism is at rest, and means are provided which are operable during pumping to maintain a subatmospheric pressure within the pump housing adjacent the shaft passage so that leakage is restrained during operation of the pump. The hub portion of the impeller may function as a sealing means or, as shown, a washer 68 may be provided of some suitable hard material such as stainless steel, which is held on the shaft between a shoulder 69 and the hub portion 10 of the impeller and during periods of rest bears against the sealing member 68 to close the shaft passage against leakage. Resilient means such as the spring 12, shown positioned on the shaft 28 between the motor armature 29 and suitable washers 13 which bear against the wall 51, provides a thrust on the shaft which tends to move the shaft 28 to the right so that the washer 68 will be held in sealing contact with the face 15 of the bearing 68. Means are incorporated in the construction of the impeller to create a force upon rotation that will move the impeller and its associated parts to the left (as viewed in Fig. 5), so that during normaloperation of the pump the washer 88 will be maintained out of contacting engagement with the member 68. During operation of the pump the impeller thrust overcomes the tension exerted by the spring I2 and the washer 88 is drawn away from the sealing member 60. When the motor circuit is opened after use, and at some point during the time that the impeller and its shaft are slowing down, the tension of the spring 12 overcomes the thrust imparted by the impeller so that the washer 68 is moved into contact with the face 15 of the uuv i ull sealing member and is thereby ground into a sealing fit each time the motor circuit is opened after operation of the pump. As the washer 88 is maintained out of contact with the face of the sealing member during normal operation wear on these parts from frictional contact is reduced so that long life of the operating parts is assured, while reducing the power consumption due to minimizing of the friction of operation of the motor and impeller shaft. While the axial shifting of the shaft 28 to move the washer 88 away from the sealing member 60 increases somewhat the compression of the spring 12 against the washers I3, ample provision for lubrication of the washers I3 is provided by the lubricant feed channel 13' so that these washers act as a lubricated thrust bearing without substantial increase in friction and wear of the thrust parts.

Within the space between the walls 51 and 58 is provided a well 62 for the collection of anyleakage water passing from the pump along the shaft 28. The well 82 is provided with a drain outlet passage 83 having a lower threaded end 84 to which a drain pipe may be attached or, as shown, a sealing plug 65 may be provided. Suitable means are provided upon the shaft 28 within the area of the well 62 to prevent any possible leakage through the member from continuing on along the shaft 28 and into the lubricated motor bearing 59. As shown, a ring 11 is fixed to the shaft 28 and is provided with an outwardly extending flange 18 which is adapted to throw off by centrifugal force any water that may pass through the member 60. The extending portion 35 of the motor frame which comprises the disclike walls 51 and 58, and the well 62, is openin its upper portion, to provide accessibility to the shaft 28 and permit the screws 38 which fasten the motor housing to the pump to be inserted and tightened. Strengthening and supporting Webs 80 connect the walls 51 and 58 at this upper open portion of the motor frame. A ring-like groove 8| is provided within the wall 58 and is positioned in line with the plane of the flange 18 so that any water thrown from the flange will be collected within the groove 8| and will be carried into the well 62. Small quantities of water collecting here may be evaporated by the normal circulation of air through this space or, as mentioned, the well may be connected to a drain pipe.

The subatmospheric pressure existing adjacent the sealing washer 68 during operation of the impeller is created by the provision of spaced openings 80 in the impeller disc adjacent the hub portion 10, and auxiliary vanes 83 which are positioned on the disc portion 84 of the impeller on the side opposite to the water circulating vanes 85'assist in maintaining this subatmospheric pressure. As shown, the impeller vanes 83 are positioned within a close fitting ring-like groove 86 provided upon the adjacent face of the wall 58. The inner ends of the vanes 83 terminate in a ring 83' which is positioned concentrically and in close fitting relationship to the inner wall of the groove-88 which is formed by the peripheral edge of the face 15 of the sealing member 60. The openings 88 provide communication from the space adjacent the sealing washer 68 to the area adjacent the central opening 20 which is maintained under suction by the action of the impeller. A baflle, in the form of a ring 81, mounted on the impeller adjacent the openings 88 serves as a deflector to direct away from the openings the flow of water induced by the impeller blades 85 and further increases the suctional pull through the openings 80 on the area adjacent the washer 68. Axial movement of the impeller and associated parts, to relieve the sealing washer from sealing contact during operation, is induced by the pressure of the water adjacent the offtake of the pump acting on the peripheral portion 88 of the rear face of the impeller. As shown, the impeller disc 84 is provided on the front face with circulating vanes 85 which extend substantially to the periphery of the disc 84. The opposite or rear face of the impeller carries the auxiliary vanes 83 which are positioned some distance in from the periphery of the disc thus providing an annular area 88 on the impeller disc. The impeller is shaped so that the area 88 lies closely adjacent the face of the Web 58 with a small clearance space 89 therebetween which is open to the interior of the pump adjacent the peripheral edge of the disc 84. Water pressure created by the impeller vanes 85 acts on the relatively narrow annular portion 98 of the front face of the impeller extending between the vanes 85 and the periphery, and also acts on the oppositely positioned relatively larger area 88 on the rear face to produce an overbalancing pressure capable of moving the impeller to the left (as viewed in Fig. The auxiliary vanes 83, like the circulating vanes 85, tend to create a circulation outwardly and by this circulation restrain the passage of water from the clearance space 89 which is under pressure towards the area adjacent the washer 68 which is under suction. The vanes 83 also restrain the passage of water towards the area of the sealing washer by provision of the close fitting relationship between the vane ring 83 and the peripheral face of the portion 15 of the sealing member 68. This close fitting relationship provides a clearance space which is considerably less than the area of the openings 88 and restrains the possible passage of water therethrough to an amount considerably less than the carrying capacity of the openings 80. Consequently the suction on the openings is effective to create the desired subatmospheric pressure. The vanes 83 therefore assist in maintaining the subatmospheric condition which restrains leakage along the shaft during operation, and aid in preserving the desired pressure differential between the rear and front portions 88 and 90 respectively of the impeller. Even though the sealing washer 68 is removed from its seat under these conditions, (as shown in Fig. 6), leakage past the sealing member 68 is prevented by the presence of subatmospheric pressure at this point. While the member 68 loosely receives the shaft 28 so as to avoid difliculties inherent in the provision of a third bearing for the motor shaft, nevertheless the spacing between the member 60 and the shaft is suiliciently small so as to prevent the ingress of objectionably large quantities of air from the open space between the walls 51 and 58 into the suction area adjacent the sealing washer 68.

For certain operating conditions, the pump and motor unit can be constructed so that the washer 68 remains in sealing contact with the sealing member 69 during operation of the impeller. This may be accomplished by so proportioning the parts of the impeller and the spring '12 that the axial thrust tending to remove the washer 68 from its seat during operation is insufficient to overcome the counterthrust of the spring 72 with in the motor housing. By such suitable proportioning of the parts, the net resulting thrust tending to hold the washer 68 on its seat during operation can be regulated to any amount desired: for

example, the first mentioned axial thrust can be such as to substantially balance the counterthrust of the spring, or a greater pressure of contact of the wash-er 68 with the sealing member 60 can be provided. In such case, the members 68 and 68 are preferably made of suitable wear resisting materials which operate Without objectionable friction, such as a hard stainless steel washer 68 and a graphite-bronze or durex sealing member 88. This construction provides an adequate sealing of the extended end of the motor shaft within the impeller housing, without the employment of the construction producing subatmospheric pressure adjacent the point of exit of the shaft from the pump housing and without the employment of stulfing boxes.

The discharge outlet 22 of the pump is provided with a threaded end 92 adjacent the opening 22' in the bottom wall of the tank In and the hollow sleeve attaching member 23 is provided with a flanged head 95 on the interior side of the tank It]. The extending threaded end 96 of the sleeve member 28 threadedly engages the portion 92 of the pump and upon drawing the sleeve 28 tight a water tight joint is provided between the tank ii! and the pump; suitable sealing gaskets 88 being included in the connection. The pump outlet 22 and the sleeve 23 are so proportioned that the inner diameters are alike, thus providing a free passage for the wash water from the pump to the wash arm which is mounted above the outlet in the sleeve 23. By attaching the pump housing to the tank in the manner shown a direct passage is provided from the pump discharge to the wash arm which is directly above the pump outlet. The wash arm 24 is supported for rotational movement upon a tubular member 88 which stands centrally aligned within the outlet end 22 of the pump discharge passage and projects therefrom into the tank l8. The lower end 89 of the hollow member 88 is threaded into a boss i861 which projects from a wall of the pump housing into the discharge passage of the pump and not only serves as a support for the wash arm structure but also provides a passage for the flow of rinse water which is carried to the wash arm structure through the hollow member 98. The boss I88 projects into the flow passage of the pump at a side thereof and is positioned so as to offer no obstruction to the free flow of wash water. The discharge passage of the pump, the boss, and the attached support member 98 are constructed so that a passage area of full pump capacity is provided in which there are no obstructions upon which waste matter flowing with the wash water may collect. The member 88 stands vertically aligned with the pump impeller, the boss is positioned directly above and adjacent the impeller, while the discharge passage is provided at a side of the boss and attached member 98. As shown, the wash arm 24 comprises a hollow member having a central hub portion ill! from which oppositely positioned arms I82 extend in which are provided suitable openings or slots i 83 through which water is adapted to issue in the form of jets upon operation of the pump. Certain of the slots are inclined, as shown at it, so that the wash arm may be rotated by the reactive force of the water issuing from the inclined slots.

The hub portion E8! of the wash arm carries bearings for free rotational movement of the arm on its supporting member 98, and is provided with an axially aligned bottom opening having a downwardly extending bounding flange l 85 which cooperates with the flanged head 95 of the pump attaching sleeve for passage of wash water from the pump to the wash arm. The upper face of the sleeve flange 95 and the bottom face of the wash arm flange I05 are machined so that they stand parallel, and adjustable means are provided in the bearing mounting so that the flange of the wash arm may be adjusted to a close running clearance with the sleeve flange to restrain leakage at this place. The bearing which carries the thrust load of the wash arm, and which also permits adjustment of the wash arm with respect to the sleeve flange 95, provides an axially aligned one point support for the wash arm structure. The supporting member 98 has pressed into it at the upper end a plug 98' which is threaded to receive a screw I06. The upper end of the screw I06, which is of some suitable material that may be properly hardened, is chamfered to provide a circular flat top surface of less diameter than the screw. The sides of the screw are flatted so that a Wrench may be applied when it is desired to adjust it, and a lock nut is provided so that the screw may be held securely in adjusted position. The upper end of the hub portion IOI of the wash arm is provided with a cap I01 held thereon as by threaded engagement. A hardened bearing I08 is provided in the cap I01 on the axial line of the hub IM and has a head portion I09 on the interior of the cap which is aligned to contact with the end of the screw I06. The hardened contacting faces of the members I06 and I08 provide a bearing whereby the weight of the wash arm and its associated parts may be supported for free rotational movement without appreciable friction. Further support of the wash arm for rotational movement is provided by the spaced sleeve-like bearings IIO positioned within the wash arm hub IM and adapted to align the wash arm with respect to the upstanding supporting member 98. The pressure of wash water entering the wash arm through the large opening adjacent the fitting 23 tends to partially oifset the weight of the wash arm carried at the point of engagement between the members I06 and I06 and provides a construction whereby the wash arm may be readily brought into rotation by the reaction forces as mentioned, and will continue to rotate freely for a period after the circulation of the wash water is discontinued. The wash arm assembly may be removed from the machine by merely lifting it from its supporting shaft 98. As the wash arm is maintained in its normal position only by gravity it will be apparent that if holes I03 should become clogged by extraneous matter in the wash water the wash arm will be lifted up by the pressure of water which will thereby be relieved between flanges 95 and I05. The interior of the wash arm is made readily accessible, as for the purpose of cleaning it, by the provision of removable end covers. Each end cover comprises a plate III pivotally supported at one side upon a screw H2 and having at the opposite side a slot I I3 which in closed position is adapted to be held by a screw II2.

A portion of the rinse water distributing system is incorporated in the wash arm 24 so that an effective rinsing operation may be secured by taking advantage of the rotational movement of the wash arm produced during the washing operation. This arrangement makes it possible 'to provide a uniform distribution of rinse water even though the rinse water should be supplied at low pressure. As shown, pipes I I4 are incorporated \JULTEDH in the wash arm structure, and are provided with jets II5 through which rinse water may issue. The pipes II4 are connected to the hub portion IOI of the wash arm and are interconnected through a cored chamber I I6 provided within the hub portion IOI. The supporting member 08, as mentioned, is of tubular form and provides a passage for supplying rinse water to the pipes I I4. A passage I I1 is provided in the supporting boss I00 and connects with the cored chamber I I6 through the hollow member 98 and a series of holes II8 positioned in the member 98 adjacent the chamber I I6. The chamber H6 is shaped so that the rinse water pressure is uniformly dis tributed both upwardly and downwardly, hence there is no lifting force exerted on the wash arm by the rinse water as is provided by the wash water. The wash water, although supplied in large volume, is at a pressure not suflicient to displace the wash arm, while the rinse water may be supplied from a city water supply at a pressure sufficient to lift the wash arm from position if the forces were not balanced as described. Any tendency tolift the wash arm by leakage of rinse water along the shaft 98 adjacent the bearing IIO into the area beneath the cap I0! is eliminated by the provision of holes H9 which prevent an accumulation of pressure against the cap. A pipe I is threadedly connected at I2I to the passage Ill and terminates at the opposite end in a fitting I22 attached to a suitable rinse valve I23 which is connected to a source of rinse water. A second pipe, designated I24, is also connected to the fitting I22 and passes through the wall of the tank I0 at I25, then extends upwardly on the interior of the casing to a position adjacent the top of the casing. Suitable rinse jets I21 are connected to a laterally extending portion I24 of the pipe I24 and are positioned within the top portion of the casing to direct streams of rinse water downwardly onto articles that may be positioned within the machine.

The supporting trackway 26 for the dish carrying racks comprises spaced horizontally extending bars I35 which are positioned at substantially the level of the supporting table and extend from the front to the rear of the machine. The forward ends of the bars I35 are provided with downturned lugs I36 which are attached to the interior of the tank II] as by means of attaching screws I 31. The rearward ends of the bars I35 are also provided with downturned lugs I39 which are suitably supported from the tank I0 as by means of screws I40. The lugs I39 serve as clamping means to position the resilient fingers I 42 which extend upwardly from the position of attach ment and are provided to form a resilient stop for the movable portion of the cover I5 when moved to open position. Upwardly extending flanges I44 having outwardly flaring forward ends I45 are positioned at the opposite sides of the bars I 35 to provide lateral guides to properly position the dish carrying racks upon the trackway. The rearward ends of the members I44 terminate in inturned lugs I46 to which a tie bar I4! is connected. The tie bar serves as a limit stop for the dish carrying racks and prevents the racks from being inserted within the machine an amount sufficient to interfere with the operation of the movable cover. Plate guards are provided to prevent articles within the racks such as dishes and the like from interfering with the proper operation of the cover. As shown, spaced members. I extend upwardly from the rear tie bar I41 of the trackway 26 and terminate at the cross pipe I25 of the rinse water system to which they are attached by the clips I32. The plate guards I 36 are curved so that they stand in spaced relation to the cover of the machine and not only serve to prevent dishes from contacting with the cover but also provide a support for the rinse pipe I2 3. Being securely positioned between the trackway and the rinse pipe, the plate guards contact with any extending articles within the rack as it is inserted and tilt these articles inwardly a sufiicient distance to permit the movable portion of the cover to be readily moved, and to prevent damage to either rack articles or cover by contact upon movement of the movable cover.

In order that the momentum of the wash arm 24, created during the flow of wash water, may be eifectively utilized to distribute the rinse water from the nozzles H5 a single control I50 is provided which is movable from a neutral position in opposite directions to operating positions for washing and rinsing operations respectively. By a single movement of this control the supply of wash water to the wash arm may be stopped and the supply of rinse water may be quickly started with practically no time interval between the two operations. As shown, the control comprises a vertically extending rod I52 which is positioned on the exterior of the machine and is supported in suitable bearings for rotational movement by an operating handle I5I to actuate the Washing and rinsing mechanism. The control rod I52 stands adjacent a side wall of the cover on substantially the line of the axis of rotation of the cover. A bracket I53 is attached to the stationary cover adjacent the upper portion thereof and is provided with a suitable bearing for free rotational support of the control rod. Another bracket I53 extends from a lower portion of the machine and provides additional support for the rod I52; the lower end of which has fixed to it a sleeve member I55 from which the operating mechanism is actuated. A collar 852 engages the rod I52 above the bearing of the bracket I53 and, with the member I55 mounted below, serves to locate the rod vertically with respect to the machine. The rod I52 is loosely received in a bracket I54 on the tank I6; the bracket extending upwardly through the horizontal flange portion adjacent the bottom of the stationary cover as shown. The bracket 553 in addition to supporting the arm I52 serves also to position the motor switch and rinse valve, so that they will be maintained in proper operating relationship. The sleeve member I 55 is provided with extending arms that are adapted to control the washing operation and rinse operations upon movement of the control rod. The washing operation is established by closing a switch to complete the circuit to the motor I8. As shown, the sleeve I55 carries an arm I51 which provides pivotal support for a link I56 of adjustable length which is connected to the actuating member I53 of the switch I59. The link I56 has incorporated in its. universal joint I56 which permits a desired freedom of movement while maintaining an operative connection at I58 with the switch actuating member. Suitable electrical connections are attached to the switch I59 to supply current through a conduit i60 to the motor I6 for actuation of the pump.

A second arm, designated I62, is provided on the member I55 so that upon actuation of the control handle in one direction the arm I62 will contact with and provide longitudinal movement of a rod I63 for actuation of the rinse Valve I23. The rinse valve, as shown, has attached to it a pipe I64 connected to a suitable source of rinse water and has connected to it the fitting I22 to which the distributing pipes are attached. The rod I63 is supported within spaced ears I 65 forming part of the bracket I53. A spring I68 is provided between the spaced ears I65, one end of which is adapted to bear against one of the supporting ears while the opposite end bears against a washer I69 positioned upon the rod I63 by means of a locating pin I16. Movement of the control handle I58 and rod I63 towards rinse position compresses the spring I68 and thereby makes it necessary for the operator to intentionally hold the control I50 against the tension of the spring for as long a time as the rinsing operation is to continue.

The lug I12 is provided on the member I55 and is positioned to limit the travel of the control member I55 and associated parts when moved towards washing position. The bracket I53 has an extending lug I13 in which is provided a set screw I14 aligned to contact with the arm I12 and adjustable to limit the travel of the control mechanism. The arms I51, I62 and I12 of the member I55 are spaced so that when the control handle and its associated parts are in neutral position the switch I59 will be in open circuit position and the rinsing valve will be closed. Upon moving the control handle to washing position (which is counterclockwise from the position shown in Fig. 9) the arm I51 through the link I56 moves the switch member I58 to closed circuit position; this travel being limited by the arm I12. Movement of the control mechanism toward washing position moves the arm I62 away from engagement with the rod I63, while movement of the control handle in the opposite direction to rinsing position swings the arm I62 to contact with and move the rod I63 to actuate the valve I23. In moving from neutral to rinse position the arm I51 swings through a radius which produces very little movement in the switch member I58; the linkage in this case being carried across a dead center position whichmaintains the switch member I58 in open circuit position. The switch shown is of a conventional tumbler type in which the switch contacts are resiliently held in either on or off position, and in which some movement of the actuating member may occur without operating the switch contacts. In connecting the switch actuating linkage the parts are adjusted so that when the control is in neutral position the switch member I58 is drawn away from its limit of travel in the direction of the off position a distance sumcient to permit the linkage to pass through dead center position as the control is moved to the rinse position. This movement in the switch is not sufficient to operate the switch contacts and consequently these are maintained in open circuit position. Movement of the control in a reverse direction from neutral position produces sufiicient movement in the switch member I58 to close the switch contacts. This arrangement of operating parts permits a single control to be used for both the motor switch and the rinse valve while allowing the required movement to open the rinse valve Without efiecting operating movement of the switch.

As shown, the rinse valve I23 is supported from a lug I16 extending from the bracket I35. The valve comprises a housing to which the rinse water supply and distribution pipes are connect- 154.. CLEANING AND LIQUID CONTACT WITH SOLIDS ed, and is provided with a suitably packed stem I" which stands aligned with the rod I63. The stem is adapted to actuate a valve plug IN to control the flow of rinse water through the passage II8 within the valve. A dash pot is provided within the valve structure to prevent sudden closing of the valve with consequent hammering and strain in the rinse supply. The dash pot comprises a cup-like shell I19 which is attached to the valve housing in alignment with the stem I11 and valve plug IN. A piston I is provided which is adapted to slide within the portion I19 and which is provided with means such as the fingers I80 to interengage the valve plug. A spring I8I is positioned between the dash pot piston I80 and the shell I19 and constantly urges the valve toward closed position. Upon releasing the valve stem I'I'I the valve is caused to close slowly by the action of the dash pot.

The attachment of the control lever I5I on the control rod is such that the position of the lever may be changed on the rod to provide a range of movement which will be convenient to the operator for a given location of the machine. The upper end of the control rod I52 is provided with a projecting key I52 while the hub portion of the lever I5I is provided with spaced key slots I5I so that upon assembly of the lever onto the rod the key may be inserted within the slot which provides the proper location for the operating handle. The lever is further held to the control rod by provision of a set screw I50. By

positioning the control lever adjacent the upper portion of the cover it is located readily accessible to the operator and is removed from the path of moving dish racks so that it will not interfere with the operation of the machine. An interlock is provided between the control mechanism and the movable portion of the cover to prevent operation of the wash water circulating system when the movable cover member I5 is open. The interlock comprises a cam plate I operable with the control rod and adapted to engage and actuate a latch member I82 operable only when the cover is closed. The cam plate I85 is in the form of a circular disc having a flat side I93, and having a control opening for passage of the control rod and spaced holes for the reception of screws I85 by which the disc is held to the bottom of the control lever. The spacing of the holes for the screws I 85' is such that the cam will stand properly with respect to the latch when attached to the lever in any of the several positions that the lever may be attached to the control rod, and will always be properly positioned for operation of the interlock. The latch member I82 is pivoted to the bracket I53, as by means of a pin I83, and is provided at one end with a finger like extension I88 which is adapted to engage the movable cover I5, and at the other end with a yoke like extension I90 which cooperates with the cam I 85 for movement of the latch. The cutaway portion of the yoke comprises two curved sides I9I and I92 having a radius equal to the radius of the circular portion of the cam plate. The axes of rotation of the cam I85 and latch I82 are positioned so that in neutral position of the cam the flat side I93 will contact with a flat end or lug I94 forming one side of the yoke extension while the latch stands in unengaged position with respect to the cover member. As the control rod is moved in a clockwise direction (as viewed in Fig. 12) toward washing position the face I93 of the cam engages the face I94 of the latch and causes it to move also in a clockwise direction. If the cover is closed no interference will be offered to movement of the latch finger I88 as a socket I86 is provided in the side wall of the cover I5 into which the finger is received. Radial movement of the latch ends as soon as the fiat face I93 passes from engagement with the end I94 of the latch; further movement of the control rod and cam being provided by the curved face I9I of the latch which is so positioned as to stand concentric with the curved face of the cam when the latch is in engaged position thus permitting the control rod to continue in its movement to the position shown in Fig. 12. If, however, upon moving the control handle as mentioned during a time when the cover is not closed the end I 88 of the latch will strike the face of the cover side wall before the flat face I93 has passed the end I94 of the latch and further movement of the control arm will be prevented. At the end of the washing operation as the control mechanism is returned to neutral position a second lug I96, forming part of the forked end I99, is engaged by the face I93 to return the latch I82 to unlatched position, as shown in Fig. 11. Further movement of the control handle, beyond neutral position, brings the control mechanism to rinsing position, as shown in Fig. 13. The control arm and cam are free to move to rinse position without disturbing the latch. With the latch in neutral the curved face I92 stands concentric with the curved portion of the cam I85 and the control lever can be moved to the position shown in Fig. 13 without moving the latch from unengaged position.

The latch I82 is proportioned to present a short effective lever arm to the control cam I85, while the lever arm terminating in the finger I88 is relatively of considerable length. This arrangement of parts permits the latch to withstand heavy loads at the control rod end, such as are encountered when an effort is made to operate the washing mechanism when the cover is open, without directing a heavy thrust against the cover wall. The parts of the latch are positioned with respect to the control cam so that, when moving to washing position, a large angular movement of the latch results from a small angular movement of the cam until the face I94 passes from contact with the flat cam face I93 after which no further movement of the latch occurs while the cam moves along the curved face I9I of the latch. The engagement in washing position is such that the latch is positively held in interlocking engagement with the cover socket I86 by contact of the latch face I9I with the curved face of the cam. The total angular travel of the cam is large as compared to the latch movement. Consequently this linkage provides in effect a lost motion between the cam and latch whereby the control rod may be moved an amount sufficient for proper actuation of the washing mechanism while moving the latch through but a short angular travel thus permitting the use of a shallow latch receiving interlock socket and long lever arm for the latch.

A supporting table is provided for the washing machine and comprises a rectangular frame 200 preferably composed of angle iron sections suitably joined, as by welding, and provided with strengthening gussets 282 adjacent the corners from which the table legs 22H extend. The legs, gussets, rails 20!), and a lower set of rails 200' which provide a frame for the support of a shelf below the table top, all being joined to provide a substantial supporting structure for the washing machine. Spaced parallel rails 2133, also of angular section, extend from front to rear of the frame 200 and are positioned with the horizontally extending legs of the angles in a plane with the top of the frame 281] and turned outwardly from one another. A connecting angle member 204 extends between the members 253 and, with the rear member of the frame 200, provides an opening 208 for reception of the washing machine. Removable bars 201 are attached to the downwardly extending legs 208 of the members 203 and are removably held thereon as by means of screws 209. These bars provide ledges upon which outwardly extending flanges 10 of the tank 10 are adapted to rest for support of the machine within the table. The rear wall of the frame between the members 203 is also provided with a removable bar 212 attached as by means of screws 213. This bar is not necessary for the support of the machine in service but may be provided for additional support when it is desired to ship the machine assembled to its table. A cover 215, which may be made of sheet zinc or some other suitable material, covers the table framework to provide a smooth working surface and has formed therein an opening 216 corresponding to the opening 205 of the framework. The rear edge of the top 2i5 is provided with an upwardly extending flange 211 which, for example, may rest against a side wall of the room. This flange preferably stands up six to eight inches from the table surface while the flanges 217' which enclose the remaining sides of the table top extend upwardly to a height of about two inches. An upwardly extending flange 213 is provided adjacent that portion of the opening 216 which will be covered by the stationary por tion E3 of the cover member, while a downturned flange 2 I 9 is provided to engage a depression provided in the edge of the tank 10 adjacent that portion covered by the movable part 15 of the easing. The cover in assembled position presents a slightly dished surface which is highest adjacent the rim of the table and slopes downwardly, an amount sufficient to provide drainage, toward a low point adjacent the downturned flange 219.

The washing machine is readily assembled to the supporting table by being lifted upwardly through the opening 2% after which it is held in place by attachment of the supporting strips 267. When the washing machine is to be assembled within this supporting structure the cover portions 53 and 15 are removed as a unit from the machine by removing the attaching screws 221, the tank 18 and associated parts are then lifted upwardly through the opening 216 until the upper edge of the tank contacts with the table cover 215 at the front edge of the washing machine. Upon moving the machine upwardly through the opening 216 into proper position the strips 20'! and 212, which have previously been removed, may be reassembled so that the flange 10 will rest upon these strips. The cover portions 13 and 15 may then be reassembled. The interengagement of the tank flanges Ill with the table structure effectively positions the washing machine so that even when in transit assembled tothe table it is securely held in place. The strips 207 and 212 prevent movement of the machine downwardly with respect to the supporting table, and the engagement of the overlapping table cover 215 with the front upper ledge of the tank as well as engagement of spaced lugs 220 which extend from the rear exterior face of the tank and underlie the strip 212 serve to prevent upward movement of the tank.

The attachment of the cover portions to the tank 10 and the assembly of the machine to the table is such that water cannot pass between the tank and the table opening 216, and during operation water may not splash from the tank adjacent the line of contact with the covers 13 and 15. As shown, the stationary portion 13 of the cover is removably attached to the top edge of the tank I by means of screws 221 and is space-d therefrom by the provision of strips 222 which provide a seal between the lower edges of the cover 13 and the tank top. At the rear of the machine the cover 13 terminates in a portion 223 which extends downwardly a short distance within the tank then turns back upon itself and extends upwardly, then outwardly as at 224 at the height of the sealing strip 222 above the top edge of the tank 18, then downwardly as at 225 to overlie the flange 218 of the top 215. The downturned flange 225 extends throughout the length of the stationary cover and overlies the table flange 218 so that any liquids spilled adjacent the exterior of the machine are directed onto the table top and are drained by the sloping top of the table into the tank at the front side. The movable portion of the cover is adapted to move to a closed position within a recess 226 provided adjacent the top edge of the tank Ill to receive this member and prevent splashing from the interior of the machine. When closed the lower edge of the cover 53 lies closely adjacent the downturned flange 219 of the table top which is also received within the recess 226 and, as mentioned above, is the low point of the table surface so that water collecting on the table may drain into the tank H3 and from there to the sump 1 1. This arrangement of overlapping flanges provides a construction which effectively prevents the leakage of water without resorting to the use of putty, solder or other sealing means.

The table top is proportioned so as to provide for easy and convenient operation of the washing machine and efiicient use of the available surface. The table top comprises a rear central portion 216 in which the washing machine is adapted to be removably supported, and an area 222 at one side of the table for the collection of dirty dishes and assembly of these into suitable Washing racks. Upon being filled the racks may be slid laterally to a front central position 223 and then slid rearwardly into the open washing machine; the level of the trackway 26 being substantially the same as the surface of the table so that dish racks may be readily inserted within and withdrawn from the machine. After the rack is inserted the cover is closed which brings the interlock socket 186 into position for reception of the latch 182 so that the control mechanism may be moved to washing position. Provision of the interlock and control at the upper part of the cover, and the use of a socket for the interlock latch in which there are no projections which during movement might strike the articles in the dish racks, permits the washing operation to be carried out without possible interference from the mechanism of the machine. At the completion of the washing and rinsing operations the cover is again opened for the withdrawal of the rack which may then be drawn forwardly and moved laterally to the opposite side of the machine from the loading area 222 into an area 224 providing space for drying previous to removal of the dishes from the racks. This arrangement of table top provides a surface of large useful area in a table of minimum size.

The shelf 225 154. CLEANING AND LIQUID CONTACT WITH SOLIDS Wl-LLULI. is su orted by me lower frame 200 provides a storage space for dish racks which are not being used.

The pump shown in Figs. 5 to 8 forms the subject matter of my Patent No. 1,967,316, granted July 24;, 1934.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. A washing machine assembly of the character described comprising in combination, a supporting table having a table top provided with an opening therein, a washing machine having an open top tank removably carried by said table opposite said opening with the level of said open top tank at substantially the level of said table top, and having a cover removably fastened to said tank, interfitting flanges between a portion of said washing machine and said table top providing drainage from the cover onto said table top and restraining leakage through the said opening through the table top, and additional interfitting flanges between said table top and said open top tank providing drainage from said table top into the interior of said tank.

2. A washing machine assembly of the character described comprising in combination, a supporting table having a table top provided with an opening therein, a washing machine having an open top tank supported by said table opposite said opening with the level of the open top tank at substantially the level of said table top and having a cover, rack supporting means carried by said tank at substantially the level of said table top, Washing mechanism within said tank, said cover including a, stationary portion over said open top tank provided with a front rack receiving opening, and a movable portion telescopically fitted with the stationary portion and pivoted thereto for exposing and closing said front rack receiving opening, interfitting flanges between the said stationary cover portion and the said table top about the sides and back of said opening through the table top providing drainage onto the said table top and restraining leakage through the said opening through the table top, and interfitting flanges between said table top and the front side of said open top tank providing drainage from said table top into the interior of said tank, said table top being inclined to direct liquid thereon toward the front side of the said open top tank and into the said tank.

3. A unitary washing machine assembly of the character described, comprising in combination, a supporting table having supporting legs, a table top carried by said legs, said table top having an opening therein adjacent the rear side thereof, a washing machine having a washing tank removably suspended from said table opposite said opening, rack supporting means stationarily carried by said tank at substantially the level of said table top, said washing machine also having a cover removably carried by said tank for enclosing said tank and having a portion movable to provide a front opening for insertion of racks into and withdrawal of racks from the said washing machine, said table top being provided with a rack supporting space on the exterior of the washing machine and in advance of the said front opening sufficient in extent to receive a rack, whereby a rack may be readily slid from the said supporting space of the table top into the washing machine and onto the rack supporting means, and may be readily slid from the rack supporting means out of the washing machine onto the said supporting space of the table top, and means for draining said supporting space of the table top into the interior of said tank.

4. A unitary washing machine assembly of the character described comprising in combination, a supporting table having supporting legs, a table top carried by said legs, said table top having an opening therein adjacent the rear side thereof, a washing tank removably suspended from said table opposite said opening, rack supporting means carried by said tank at substantially the level of said table top, and a cover removably carried by said tank and providing a washing compartment, said cover having a portion movable to provide a front opening for insertion of racks into and withdrawal of racks from the said compartment, said table top being provided with a rack supporting space on the exterior of the tank and in advance of the said front opening sufilcient in extent to receive a rack, whereby a rack may be readily slid from the said supporting space of the table top into the compartment and onto the rack supporting means, and may be readily slid from the rack supporting means out of the compartment onto the said supporting space of the table top, said table top also being provided with rack supporting spaces at opposite sides of said tank sufficient in extent to receive racks thereon, whereby a rack may be slid from the supporting space at one side of said tank to the supporting space at the front of the tank and then into the compartment, and may then be withdrawn from the said compartment onto the said front supporting space and be then slid to the supporting space at the opposite side of the tank.

5. A washing machine comprising an open top tank, an outwardly extending flange on said tank, a supporting frame for said tank having an opening therein for reception of said tank, supporting members detachably connected to said supporting structure and adapted to underlie said flange to removably suspend the tank from said supporting frame, and an outward projection on said tank beneath at least one of said detachable supporting members to restrain upward movement of said tank from its suspended position.

6. In a washing machine, an open top tank, washing means therein, a cover for said tank adapted to move from a position enclosing the open top of said tank to a position adapted for the insertion of a rack of articles to be Washed into said tank, rack supporting means within said tank adapted to support the said rack of articles in the said tank in position to be enclosed by said cover, and a guard member positioned above said rack supporting means at the height of projecting parts of articles in said rack, said guard member being within but adjacent the path of movement of said cover to prevent articles in the said rack from being moved into the path of movement of the said cover.

'7. In a washing machine, an open top tank, washing means therein, a cover for said tank including a stationary portion and an interfitting movable portion, said stationary portion comprising spaced parallel end walls and a connecting curved side wall, said movable portion comprising spaced parallel end walls and a connecting curved side wall receivable within said stationary portion and movable from a position in which the movable portion is telescoped within the stationary portion to an extended position providing a closure for said washing machine tank in which parts of the cover portions still overlap, rack supporting means Within said tank positioned substantially at the level of the open top of said tank and adapted to support a rack of articles in the said tank in position to be enclosed by said cover, means for limiting the extent of insertive movement of the said rack to prevent the rack from being moved into the path of movement of the movable cover portion, and a plurality of spaced guard members extending upwardly in substantially parallel relationship across the rear of said washing machine, each guard member comprising a curved bar extending upwardly above the said rack supporting means and rack carried thereby within but adjacent the path of movement of the movable cover portion to prevent articles carried by the rack from protruding into the path of movement of the said movable cover portion.

8. In a washing machine, a washing compartment having a movable cover therefor, a rack supporting structure adapted to support a rack of articles to be washed in position in said washing compartment to be enclosed by said cover the path of movement of said cover being adjacent articles supported in a rack mounted on said rack supporting structure, means for distributing wash water upon the rack of articles within said compartment, means for distributing rinse water upon the rack of articles within said compartment including a rinse water supply pipe positioned above said rack supporting structure, and a guard member extending from said rack supporting structure to said rinse pipe and intermediate the path of movement of said cover and the position of articles in the rack to limit the position of articles within an inserted rack to prevent the articles from protruding into the path of movement of said movable cover.

9. In a washing machine, a washing compartment, a movable cover member therefor adapted to move from a closed position closing said washing compartment to an open position, means for supplying washing fluid to said washing compartment, a movable control member for said washing fluid supply means, and a latch member for interengagement with the cover member and the control member to prevent opening the cover when the control member is in position for supplying washing fluid and to prevent movement of the control member to the position for supplying washing fluid except when the cover is closed,

'said latch having a cover engaging portion for holding the latch in locking engagement with the control member when the cover is open to prevent movement of the control member to the position for supplying washing fluid and having a portion operated by the control member for moving the latch into locking engagement with the cover when the cover is closed and the control member is moved to the position for supplying washing fluid.

10. In a Washing machine, a washing compartment, a movable cover member therefor adapted to move from a closed position closing said washing compartment to an open position, fluid supply means for supplying washing fluid to said washing compartment, a movable control member for said fluid supply means, a latch member operable as an interlock between said cover member and said control member, said latch member having a portion held by the cover in engagement with the control member when the cover is open to prevent actuation of said control member to supply washing fluid to said washing compartment, said cover member having a recessed portion adapted to move with said cover member to a position opposite said latch member when said cover is moved to closed position to provide for movement of the latch member and actuation of the control member to supply fluid to the washing compartment, said latch member being moved upon actuation of the control member to supply washing fluid to the washing compartment into interlocking engagement with the said recessed portion of said cover member to prevent opening of said cover member in such fluid supplying position of the control member.

11. In a washing machine, a Washing compartment, a movable cover member therefor adapted to move from a closed position closing said washing compartment to an open position, fluid supply means for said washing compartment, a movable control member therefor, a pivotally mounted latch member directly operative between said cover member and said control member when said cover member is in open position to provide an interlock to prevent actuation of said control member such as to supply fluid to said washing compartment, said latch member comprising an arm on one side of the pivotal mounting adapted to cooperate with and engage said cover member, and a forked arm on the opposite side of the pivotal mounting adapted to cooperate with and be operatively engaged by said control member, said cover member having a socket portion movable therewith to a position opposite said first mentioned arm of the latch member when the cover member is moved into closed position to provide for movement of the latch member into said socket portion so that the control member may be moved to supply fluid to the washing compartment, the said first mentioned arm of the latch member being moved into interlocking engagement with the said socket portion of the cover member as the said latch member is swung about its pivotal mounting by the operative engagement of the control member when the control member is actuated to supply fluid to the washing compartment.

12. In a washing machine, a washing compartment, a movable cover member therefor having latch receiving means thereon, Wash water supply means for said washing compartment, rinse Water supply means for said washing compartment, a single control member therefor movable in opposite directions from a neutral position and having latch receiving means thereon, operative interconnections between said single control member and said wash water supply means and said rinse Water supply means for actuating said wash water supply means and said rinse water supply means respectively, a separate latch member directly operative as an interlock between said cover member and said control member, said latch member having a portion held by the cover in engagement with the latch receiving means of the control member when the cover is open to prevent actuation of said control member such as to supply Wash Water to said washing compartment, said latch member being movable by the control member in closed position of said cover into interlocking engagement with said latch receiving means of the cover member when said control member is 154;. CLEANING AND LIQUID CONTACT WITH SOLIDS muveu 11.1w position l/U supply wasu water to said washing compartment.

13. In a washing machine, a washing compartment, wash water supply means therefor, rinse water supply means therefor, a single control means movable from a neutral inoperative position in opposite directions to operative positions for control of said wash and rinse water supply means respectively, and a linkage permamently and positively connecting said control means and one of said supply means including a pivotally interconnected arm and link, said linkage allowing movement of the control means to operative position in one direction as the said pivotally interconnected arm and link move from one side of dead center position to the other side thereof without substantial movement of the said supply means positively connected thereto so as to avoid actuation of said supply means, said supply means being actuated upon movement of the control member in the opposite di rection from neutral position.

14. In a washing machine, a washing compartment, a movable cover member therefor, fluid supply means for said washing comp-artment, a manual control member movable to actuate the fluid supply means, interlock actuating means on said control member, a movable interlock operative between the movable cover member and the interlock actuating means of the control member, said interlock comprising a lever having a relatively short effective lever arm operatively engaged by said interlock actuating means and receiving the moving force transmitted from the manual control member when force is applied to the latter to actuate the fluid supply means, and a relatively long effective lever arm adapted to engage the cover member when in open position to prevent movement of said manual control member to actuate the fluid supply means whereby the pressure of said long lever arm against said cover is reduced for a given force transmitted from said manual control member to said short lever arm.

15. In a washing machine, having a washing compartment, a movable cover therefor having an interlock receiving portion, fluid supply means for said washing compartment, and control means therefor including an operating member; a cam member movable by said control means, a separate movable interlock member positioned adjacent said cover for operation by said cam into interfltting engagement with the said interlock receiving portion of said cover, so that upon movement of the control means to supply fluid to the washing compartment the interlock is moved into interfltting engagement with the said interlock receiving portion of the cover member, said inter-- lock member having a surface portion positively engaged by said cam to effect movement of the interlock member, and another portion of the surface of the interlock member being concentric with a cooperating portion of the surface of the cam to provide for additional movement of the control means and cam Without movement of the interlock member.

16. In a Washing machine, having a washing compartment, a movable cover therefor, fluid supply means for said washing compartment, and control means therefor including a control handle; a control cam detachably connected to said control handle, an interlock member operable by said control cam and positioned to be moved by said cam into interlocking engagement with said cover when said control handle is actuated to supply fluid to said compartment, means for attaching said control handle to said control means in different angular positions, and means for attaching said control cam to the control handle to insure the attaching of the control cam in proper operative position relatively to said interlock member irrespective of the attached position of the control handle on the said control means.

17. In a washing machine, an open top tank, a cover member for enclosing said open top tank including a stationary portion having a front opening and a movable portion in telescoping relationship within said stationary portion and adapted to close the said front opening of the stationary portion, fluid supply means for said washing machine, control means therefor including a control shaft extending upwardly along the side of said cover member, a control handle for said shaft positioned adjacent the upper portion of said cover member, an interlock movably mounted on said machine adjacent said cover member, and operative interconnections between said interlock and said control means to move said interlock into interlocking engagement with the said movable cover portion in closed position of said movable cover portion when said control means is moved to actuate said fluid supply means, said movable cover portion having an interlock receiving portion movable with said cover portion within the stationary cover portion as the movable cover portion is moved to open position.

18. In a washing machine, a washing compartment, a cover member therefor, fluid supply means for said washing compartment, control means for said fluid supply means including a control member movable from a neutral position to a fluid supplying position, a cam actuated by said control means, an interlock member operatively engaged and actuated by said cam, said interlock being positioned to operatively engage said cover member in open position of the cover member to prevent actuation of said control member from neutral position to said fluid supplying position when said cover member is open, said cam having a curved operating surface and a flat operating surface, said interlock member also having a curved cooperating surface and a flat operating surface, the said flat surfaces of the cam and interlock member being in cooperating frictional engagement in neutral position of said control means, whereby force applied to said control member tending to move the control means to the fluid supplying position when the said cover member is open and which is resisted by the contact of the interlock member against the cover is partially dissipated in frictional resistance between the said cooperating flat surfaces to thereby reduce the pressure of contact of the interlock member against the cover.

19. In a Washing machine, a Washing compartment, a cover member therefor, fluid supply means for said washing compartment, control means for said fluid supply means including a control member movable from a neutral position to a fluid supplying position, an interlock member positioned to operatively engage said cover when said cover is open, operative connections between said control means and said interlock to effect movement of said interlock member upon movement of said control member, and to prevent actuation of said control member to supply fluid to said Washing compartment when said interlock member engages said cover in open position of the cover, said cover having an interlock receiving recess positioned so as to move opposite said interlock member when the cover is moved to closed position, said interlock being moved in closed position of the cover upon actuation of the control member to fluid supplying position into interlocking engagement with said recess of the cover member, said operative connections between said control means and said interlock including a lost motion device to provide for a relatively small effective movement of the interlock member into interlocking engagement with the said recess upon a relatively larger movement of the control member of the said control means upon movement of the control member and control means into fluid supplying position.

20. In a washing machine, a Washing compartment, a cover member therefor, fluid supply means for said washing compartment, control means for said fluid supply means including a control member movable from a neutral position to a fluid supplying position, a cam member operatively connected to said control means to be actuated thereby, a pivoted interlock member operatively engaging said cam member to be moved thereby, said interlock member being positioned to move into interlocking engagement with said cover to maintain the cover closed when said control member is moved to said fluid supplying position, said interlock member having spaced fingers adapted to be engaged by said cam upon movement of the cam and control member in opposite directions, said interlock member having a cam concentric surface between said fingers to provide for additional movement of said cam and control member without corresponding movement of said interlock member.

21. In a washing machine, a washing compartment and a reservoir, said washing compartment draining into said reservoir, a pump having a volute housing provided with a centrally arranged intake communicating with said reservoir and a tangentially arranged pump outlet communicating with said washing compartment, an impeller within said volute pump housing, rinse water discharge means within said washing compartment, a rinse water supply conduit positioned within said pump outlet, said pump housing having a rinse water supply passage formed therein above said impeller and communicating with said rinse water supply conduit at a position adjacent and freely accessible from the outlet where it communicates with the washing compartment, said supply passage extending from the wallof said pump housing so as to form a continuation of the volute housing of the said impeller, the lower portion of the said tangentially arranged pump outlet being positioned at the side of said rinse water supply passage and conduit whereby the discharge of the pump outlet from the immediate vicinity of the impeller is substantially unimpeded, the upper portion of the pump outlet surrounding the said rinse water supply conduit.

22. In a washing machine, a washing compartment, a reservoir adapted to contain a quantity of wash water, said washing compartment draining into said reservoir, said reservoir having a conical seat in a wall thereof, an overflow pipe bodily removable from said reservoir having a conical end removably positioned in the said conical seat in the wall of said reservoir, wash water spraying means for said washing compartment, a pump for supplying wash Water to said spraying means, an intake for said pump extending into said reservoir, said pump intake being formed with an outer guiding groove for guiding said overflow pipe into assembled position in the said conical seat.

23. A washing machine assembly of the character described, comprising in combination, a supporting table having a table top provided with an opening therein, an upstanding flange on said table about only a portion of the edge of said opening, a washing machine having an open top tank suspended from said table opposite said opening, means carried'by said table for supporting the machine with the level of said open top tank at substantially the level of said table top, rack supporting means stationarily mounted on said assembly at substantially the level of said table top, a cover carried by said assembly for enclosing a rack within the machine when positioned on said rack supporting means, and a flange carried by said cover and overlying said upstanding flange of the table top to provide drainage from the cover onto the table top, said table top having a flange overlying said open top tank to provide for draining into said open top tank about a portion of the edge of said opening in the table top which is unprovided with the said upstanding flange.

24;. A washing machine assembly of the character described, comprising in combination, a supporting table having a table top provided with an opening therethrough, a washing machine having an open top tank suspended from said table opposite said opening, means carried by said table for supporting the machine with the level of said open top tank at substantially the level of said table top, rack supporting means stationarily mounted in said tank at substantially the level of said table top, a cover over said open top tank, including a stationary exterior part, and a pivotally mounted interior part telescopically fitted within said exterior part and movable to provide an opening through which a rack may be slid from said table top onto said rack supporting means and then enclosed Within said machine, an upstanding flange on said table top about the portion of the edge of said opening along which said stationary exterior cover part extends, a cooperating flange on said exterior cover part overlying the said table flange to provide draining from theexterior oi the cover onto said table top, and a downwardly extending flange on said table top overlying the edge of said open top tank about another portion of the edge of said opening for draining liquid from said table top into said tank.

25.111 a washing machine, the combination with a tank, washing means therein, a cover for the tank including an outer stationary portion and an inner movable portion telescopically fitted within said stationary portion, and rack supporting means for supporting a rack of articles within the machine in position such that the inner movable cover portion is adjacent articles in the rack, of a guard member positioned Within and adjacent the path of movement of said inner movable cover portion and above said rack supporting means at the height of articles within said rack to prevent articles in the said rack from moving into the path of movement of the said movable cover portion.

26. In a washing machine, a washing compartment, wash liquid supply means therefor including a motor operated pump and a switch for controlling the supply of electrical energy to said motor, rinse liquid supply means therefor, a single manual control member. and operative interconnections between said single manual control member and said motor switch and said rinse liquid supply means such that movement of said manual control member in one direction from a neutral position closes said switch to supply wash liquid to said compartment, and movement of said manual control member in another direction from said neutral position actuates said rinse liquid supply means to supply rinse liquid to said compartment, said operative interconnections including a permanent and positive interconnection between said control member and said switch comprising a pivotally interconnected arm and link movable from one side of a dead center position to the other side thereof as said manual control member is moved from neutral position in said other direction to supply rinse liquid to said compartment, and without sufficient movement of said switch positively connected thereto such as to close said switch.

27. The combination of a table top containing an opening and having an upturned flange around part of the opening and a downturned flange around the remainder of the opening, and a partially enclosed, washing machine tank in the opening, having, on its enclosed part, a downturned flange overlapping and lying outside of the upturned flange of the table and, at the upper edge of its open part, an upturned flange overlapping and lying outside of the downturned flange of the table top.

DAVID A. MEEKER.

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