US2706990A - Apparatus for controlling the time of washing and rinsing in dishwashing machines - Google Patents

Description

April 26, 1955 H. F. LYMAN 2,706,990 APPARATUS FOR CONTROLLING THE] TIME OF WASHING AND RINSING IN DISHWASI-IING MACHINES Filed June 21, 1952 5 Sheets-Sheet l INVENTOR HOMER r: LYHAN.

H. F. LYMAN April 26, 1955 APPARATUS FOR CONTROLLING THE TIME OF WASHING AND RINSING IN DISHWASHING MACHINES Flled June 21, 1952 5 Sheets-Sheet 2 Mgr.

R Y m w W M V m m 1A Hm 2,706,990 OF WASHING HINES H. F. LYMAN ONTROL April 26, 1955 APPARAATUS FOR C LING THE TIME ND RINSING IN DISHWASHING MAC 5 Sheets-Sheet 3 Filed June 21, 1952 "Ill:

8 x 2 M ATTORNEY April 26, 1955 Filed June 21, 1952 H. F. LYMAN APPARATUS FOR CONTROLLING THE T AND RINSING IN DISHWASHING IME' OF WASHING MACHINES 5 Sheets-Sheet 4 INVENTOR HOMER F. LMAN.

ATTORNEY April 26, 1955 M N 2,706,990

APPARATUS FOR CONTROLLING THE TIME OF WASHING Filed June 21, 1952 AND RINSING IN DISHWASHING MACHINES 5 Sheets-Sheet 5 HOMER E LYMAN W ATTOHN Y APPARATUS MACHINES Homer F. Lyman, Nutley, N. J. Application June 21, 1952, Serial No. 294,768 12 Claims. (Cl. 134-95) FOR CONTROLLING THE TIME OF IN G IN DISHWASHIN G disposed belo the spray pipes by a circula water from a tank compa The pump is driven by a washing operation ump which receives the rtment below the spray pipes. n electrical mot leted, the dishes are receive rinse-water from a source of heated wat a valve-controlled co The present invention The timing ap prises hydrauli respectively, onto the dishe ans for controlling rinsed has another ca Said other ca time the dishes are the rinse valve being maintained in its opened position for a predetermined length of time by said cam, thereafter to return to its closed position. Each of the hydraulic motors has a shaft upon which said cams are said operating direction being governed by movement in one direction of a piston associated with the shaft against a fluid Within a fluid-filled chamber. The fluid is permitted to escape from the cylinder in front of the piston at a controlled predetermined rate of flow to a position within the cylinder behind the piston. At the end of movement of the piston in said one direction, the shaft is turned, by a manually-actuated handle, against the tension of said spring, in a non-operating direction which is opposite to the direction in which the shaft is turned during its operating movement. Movement of the shaft in said non-operating direction causes the piston to The cams are so constructed and so arranged that movement of the manually-operated lever in one directron by an operator causes the cam associated with the as the motor and pump become inoperative, a portion of the cam on the washlng timer motor engages the lock and releases said lock from thecam on the rinsing timer motor thereby permitting said cam on t e rinsing timer motor to turn in an operating direction. The cam cam being so constructed that the rinse valve is opened as said cam turns in an operating direction so as to permit rinse-water to flow into the rinse spray pipes and rinse the dishes. The shape of the rinse cam is such as to maintain the valve in an opened position for a predetermined amount of travel of the motor and cam in an operating direction and at the end of said length of travel in the operating direction, permit the valve to close thereby preventing further flow of rinse-water to the rinse spray pipe. In this manner, the washing mechanism is permitted to wash the dishes for a predetermined length of time after which time the washing mechanism becomes inoperative and the rinsing mechanism becomes operative so that the dishes are rinsed for a predetermined length of time after which the rinsing mechanism becomes inoperative. The length of time that a tray of dishes is washed and the length of time that said washed dishes are rinsed is controlled by controlled by controlling the speed of movement of the washing cam cam in an operating direction by the cams are mounted through controlling the speed of movement of the pistons in the washing timer hydraulic motor and in the rinsing timer hydraulic motor which speed of movement is in turn controlled by controlling the flow of fluid from the space in the cylinder ahead of the pistons to the space at the rear of the pistons in the cylinder.

The invention will be understood from the following description when considered in connection with the accompanying drawings in which:

Fig. 1 is a side elevational view of the dishwashing apparatus embodying the present invention, parts of the casing being broken away, the dishwashing apparatus being illustrated in its dishwashing cycle;

Fig. 2 is a side elevational view of the washing and rinsing time control apparatus of the present invention with its housing removed and mounted on top of the dishwashing apparatus shown in Fig. 1;

Fig. 3 is a plan view of the time controller shown in Fig. 2 in its inoperative position;

Fig. 4 is a sectional plan view of one of the hydraulic motors of the time controller taken on the line 4-4 of Fig. 2;

Fig. 5 is in Fig. 4;

Fig. 6 is a view similar to Fig. 3 but the time control apparatus is shown in washing position and at substantially the beginning of the dishwashing cycle of the dishwashing apparatus;

Fig. 7 is a view similar to Fig. 4 with the various parts of the motors shown in the position they assume when the timer is at the beginning of the washing cycle as illustrated in Fig. 6;

Fig. 8 is a vertical sectional view of the motor in the position illustrated in Fig. 7;

Fig. 9 is a plan view similar to that shown in Fig. 3 except that the time controller is disclosed with the parts thereof in rinsing position and at substantially the beginning of the rinsing cycle of the dishwashing apparatu a vertical sectional view of the motor shown s. Like characters of reference refer to like out the several views.

Referring to Fig. l of the drawings, the reference numeral 10 designates the casing of the dishwashing and rinsing machine, which casing is substantially rectangular in cross-section. The casing 10 comprises opposite end walls 11 and 12, opposite side walls 13 and 14, a top 15 and a bottom 16 forming therebetween a washing and rinsing chamber 17. The opposite end Walls and the opposite side walls adjacent thereto are secured together preferably by welding and the top and bottom are welded to the sides and ends so that the washing and rinsing chamber 17 1s water-tight. Casing 10 is supported on legs 18, 19, 2t and 21 which legs each comprise L-shaped angle bars. Each of the legs is secured to the casing at a corner formed by joining of the opposite sides of the casing and the opposite ends thereof.

A table adapted to support a dish rack 22 is positioned in chamber 17 substantially intermediate the top 15 and bottom 16 of the dishwashing machine. The table comprises spaced L-shaped angle bars 23 and 24 extending between opposite end walls 11 and 12 adjacent to and in spaced relationship with the opposite side walls 13 and 14. Angie bars 23 and 24 are secured at one end thereof to a support 25 projecting along the end wall 11 between the side walls 13 and 14 and at the opposite end thereof to a support 26 extending along the end wall 12 between said side walls. Rack 22, in the embodiment of the inparts throughvention illustrated, comprises an elongated tray open at the top and at the bottom thereof and having a plurality of supporting means for dishes 27 so arranged as to support the dishes in a plurality of spaced rows extending internally of the tray. The rack 22 may be inserted in chamber 17 either through the opening 28 in the end wall 12 or the opening 29 in the end wall 11. Opening 29 is closed by a door 30 while the opening 28 is closed by a door 31.

Dishes 27 are washed by directing streams of washing liquid under pressure on them from a plurality of wash spray pipes 32 positioned in the chamber 17 above the rack 22 so as to direct streams of water downwardly onto the dishes in said rack and by lower spray pipes 33 disposed below the rack of dishes so as to direct streams of wash-water upwardly and over said dishes in the rack 22. Upper spray pipes 32 receive wash-water from wash-water conduit 34 through a connecting pipe 35 while lower spray pipes 33 receive wash-water through a connecting pipe 36 which communicates with said washwater conduit 34. Wash-water conduit 34 is in communication with the outlet 37 of the pump 38, the suction (not shown) of which pump communicates through a conduit 40 with a wash-water tank 41 within the casing 10 of the dishwashing and rinsing machine in the lower part thereof below lower spray pipes 33. Intermediate spray pipes 33 and wash water tank 41 is a straining screen 42 through which wash-water from upper spray pipes 32 and lower spray pipes 33, after flowing in contact with the dishes in rack 22, passes into tank 41. A strainer 43 is positioned over the inlet of conduit 40 so that foreign substance from tank 41 will not pass into said conduit and into pump 38.

Pump 38 is actuated by an electrical motor 44, the shaft 45 of which is connected to a pump shaft 46 through a coupling 47. Motor 44 is electrically connected to a wash switch 48 (Figs. 3, 6 and 9) by an electrical conduit 49 having leads 50 and 51.

After washing of the dishes is completed, as will hereinafter be described, the dishes in rack 22 are rinsed by streams of rinse-water directed downwardly thereover from an upper rinse pipe 52 which pipe is adapted to be rotated by the reaction forces of the fluid under pressure expelled therefrom. Pipe 52 is revolved from a center connection 53 by said reaction force of rinsewater flowing into the upper pipe 52 through a connecting pipe 54 which pipe communicates with a main rinse conduit 55. A lower rinse water pipe 56 is disposed below rack 22 and projects streams of rinse-water upwardly over the dishes in rack 22, said lower rinse pipe 56 revolving in a manner similar to upper pipe 52. Lower rinse water pipe 56 communicates with main rinse conduit 55 through a lower connecting pipe 56'.

Flow of rinse water into main rinse conduit 55 from a rinse inlet pipe 55' is controlled by a rinse-water control valve 57 (Figs. 2, 3, 6 and 9), which control valve is normally retained in a closed position so that rinse water cannot flow from rinse inlet pipe 55 through valve 57 comprises a stem 61 which is actuated by a spring 62 so as be maintained in a seated position (Figs. 3 and 6) in valve seat 63 so as to close valve opening 64. To open valve 57, stem 61 is actuated inwardly of the valve against the tension of spring 62 until closure valve is unseated (Fig. 9) which permits water to flow from rinse-water inlet pipe 55 through valve opening 64 into main rinse conduit 55, as will hereinafter be fully described.

Wash switch 48 (Figs. 3, 6 and 9) comprises movable contacts 65 and 66 which are connected to leads 50 and 51, respectively, and also comprises fixed contacts 67 and 68 which are respectively connected to source leads 69 and 70. Movable contacts 65 and 66 are actuated by a switch lever 71 into and out of engagement with fixed contacts 67 and 68, the movement of contacts 65 and 66 into engagement with fixed contacts 67 and 68 being against the tension of spring 72. The tension of said spring 72 acts upon the movable contacts to disengage them from fixed contacts 67 and 68.

The length of time that dishes in rack 22 are washed by the projection of sprays of wash-water downwardly there on through upper spray pipes 32 and the projection of wash-water upwardly thereonto through sprays from lower spray pipes 33 and the length of time after said washing operation that the dishes are rinsed through the projection of streams of rinse-water downwardly thereonto through upper rinse pipe 52 and the projection upwardly thereonto of rinse-Water from lower rinse-water pipe 56 is controlled by a time controlling apparatus 73 (Fig. 1) having a housing 74 which time controlling apparatus comprises a wash-time controller which acts upon washposition so that rinsewater will flow into upper rinse pipe 52 and lower rinse water pipe 56 after switch 48 is opened so that the dishes in rack 22 will be rinsed after washing thereof. Valve Time controlling apparatus 73 (Fig. 1) consists of a Wash-time controller 75 and a rinse-time controller 76 (Figs. 2, 3, 6 and 9). Wash-time controller 75 comhorizontally extending cylindrical chamber 86, piston head 83 being in fluid-tight relationship with the inner periphery of said chamber. Chamber 86 is closed at the opposite ends thereof while main rotating shaft 79 extends vertically upwardly through an upright cylindrical chamber 87, both of which chambers are contained within the body 89 of the motors.

Fluid is contained within chamber 86 for movement is rotatable with the shaft. which is rotatable therewith, which dog engages a lower rotatable collar 98, because of its engagement with lower dog 97, to likewise turn in clockwise direction. This winds a coil spring 99 which within the upright cylindrical chamto limit the rotation of shaft 79 or operative direction.

96 on collar 94 so as in a counterclockwise 83 passes outwardly port 103 of passage 104, which inlet port is controlled by inlet port control valve 106. Adjusttoward its closed 107 to which motors are secured by screws 108 109 on the body 89 of the motors.

mounting member the. extending through lugs The upright mounting locking member riser 113 on the outer periphery 112' thereof, which riser is substantially U-shaped and in spaced relationship with a switch actuating riser 114 also tending between riser 112' of cam 112 extends inwardly toward the the cam from surface 114' into detent 115.

Rinse-time Each of the d 115 has an actuating arm projecting outwardly from the periphery of each. 11 operating handle 121 is pivotally mounted on the arm of cam 112 and has 122 which engages arm 120 of cam 112 so that the tate the cam in a clockwise direction but inoperative to lever 123. The heads of studs 124 and 125 retain lever 123 from movement fromthe studs. As shown, the opcenter of is disposed to engage switch lever 71 of switch 48. On the opposite end of switch actuator arm 129 is rotatably mounted a roller 132 which is engaged by risers 113 and 114 on earn 112 as will hereinafter be described.

Also pivotally mounted on upright mounting member 107 is a locking member 133 which has two arms 134 and 135 at right angles to one another. Arm 134 has a roller 136 rotatably mounted at the end thereof, which roller, when the locking member 133 is in locking position, is acted upon riser 113 of cam 112. Arm 135 has a roller 137 rotatably mounted at the end thereof, which roller is adapted to be releasably maintained cam 115 when said cam is held in locking position as will hereinafter be fully described. The locking member 133 is rotatably mounted adjacent the juncture of arms 134 and 135 on pivot 138.

Rinse valve 57 is mounted on upright plate 111, the stem 61 of which valve is operated by a plunger 139 mounted for reciprocal movement in bracket 140 toward and away from said valve. Plunger 139 is operated in a direction toward valve 57 by arm 141 of valve operating member 142 which operating member has another arm 143 extending at right angles to arm 141 and toward cam 88. Valve operating member 142 is pivotally mounted on bracket 140 on pivot 144. A roller 145 is rotatablymounted on the end of arm 143 and extends into the path of movement of riser 116 on cam 88.

So that an alarm will be given at the end of the washing and rinsing operations, a bell 146 is secured to upright plate 111 which bell is contacted by contacting member 147 disposed on a spring steel upright 148. Upright member 148 is acted upon by one en of a lever 149 pivoted intermediate the opposite ends thereof at 150 on upright mounting member 107. The opposite end of lever 149 designated by reference character 151 is in the path of wall 118 of detent 117 so that said wall will turn lever 149 clockwise direction to sound an alarm at the end of the dishwashing and rinsing operations as will hereinafter be scribed. Opposite end 151 of lever 149 is also in the path of riser 117 so that said riser will turn the lever in a counterclockwise direction into an operating position when cam 88 is turned in a clockwise direction.

Proceeding now to the operation of the timing mechanism of the present invention, the various parts there of in their normal or inoperative position are illustrated in Figs. 2 to of the drawings. Referring particularly to Fig. 3, it will be noted that movable contacts 65 and 66 of wash switch 48 are out of engagement with fixed contacts 67 and 68 of said switch. Electrical current, therefore, cannot flow from a source through live leads 69 and 70 into leads 50 and 51 of conduit 49 and electrical motor 44 and pump 38 are, therefore, in their inoperative position and wash-water is not circulated into the upper and lower spray pipes 32 and 33, respectively. Switch lever 71 is positioned at its furthermost location to the right (Fig. 3) and spring 72 is not under tension. Switch lever 71 is in the path of movement of plate 131 on switch actuator arm 129 when said actuator arm is moved in a counterclockwise direction on pivot 130 as will presently be described. In the position shown in Fig. 3, wash timer controller cam 112 and switch actuator arm 129 are so disposed in relationship roller 132 on arm 129 is positioned within detent 115 of cam 112. At this time, rinse control valve 57 is in its closed position so that rinse-water cannot flow 55' into main rinse conduit 55 61) is maintained in a seated po- 63 by action of spring 62. One end of plunger 139 bears against a stem 61 while the opposite end of said plunger is in contact with adjusting screw 144 in arm 141 of valve operating member 142. Roller 145 in arm 143 of member 142 is in the path of movement of rinse valve actuating riser 1 on rinse timer control cam 88. Also, roller 137 on arm 135 of locking member 133 is in engagement with outer periphery 119 of rinse timer cam 88, the locking member 133 being held in the position shown in Fig. 3 by the periphery of cam 79 against tension of spring 138.

The various parts of the wash time controller hydraulic motor 77 and rinse time controller hydraulic motor 78 are in the position illustrated in Figs. 4 and 5 when the various other parts of the timer are located in the normal or inoperative position illustrated in Fig. 3 as hereinabove described. It will be noted that pistons 82 of the motors are located in their furthermost position to the right, Figs. 4 and 5, the fluid in chamber 86 being to the rear or ing chamber 24 of the supporting table within the chamber. ings 28 and 29 in the opposite end walls of the dishwashing and rinsing machine are ing doors 30 and 31, respectively. The timer is thereafter set in operation by the movement of handle 121 A, as illustrated in Fig. 3 in a clockwise direction to position B illustrated in dot-and-dash lines to the left of Fig. 3 and in full lines (Fig. 6). Movement of handle 12]. from position A to position B rotates wash cam 112 and shaft 79 on wash time control motor 77 in a clockwise direction because stop 122 on handle 121 engages outwardly projecting arm on cam 112. At no time during the operation of the timing mechanism of the present invention can the cams 112 and 88 be moved in a clockwise direction by handle 121 because movement of the handle 121 in a counterclockwise direction from a position A to position C, as shown in dot-and-dash lines (Fig. 3) will be on pivot 121 by means of which the handle 121 is pivotally mounted on outwardly projecting arm 120 of cam 112.

As handle 121 is moved from position A (Fig. 3) to position B, the parts of the timer of the present invention are operated into washing position illustrated in Fig. 6. Cam 112 turns in a clockwise direction and operating lever 123 moves to the left of Fig. 3, the right hand end of slot 126 engaging stud which causes rinse cam 8 also to rotate in a clockwise direction. As wash timer cam 112 turns in a clockwise direction from the position illustrated in Fig. 3 to the position illustrated in Fig. 6, riser 114 engages roller 132 on switch actuator arm 129 thereby moving actuator arm in a counterclockwise Counterclockwise movement of actuator pivot 130 causes plate 131 to move switch lever 71 to the left from the position shown in Fig. 3 toward the position shown in Fig. 6 which in turn moves movable contacts 65 and 66 of the switch toward fixed conhandle 121 has been moved A, cam 112 has reached the full extent of its movement in a clockwise direc- 132 on switch actuator arm 129 has also been moved to the full extent of its movement in a counterclockwise direction after riding out of detent 115 of cam 112 over riser surface 114' of riser 114 and into the position shown in Fig. 6. At this time switch lever 71 has been moved to the full extent of its movement to the left against the tension of spring 72 and movable contacts 65 and 66 of switch 48 are in engagement with fixed contacts 67 and 68 of said switch as shown in Fig. 6. Electrical current then flows from an electrical source through leads 69 and 70 through fixed contacts 67 and 68, movable contacts 65 and 66, thence through leads 50 and 51 of electrical conduit 49 to motor 44. Motor 44 is then set in operation which drives pump 38 through shaft 45, 47 and shaft 46. Wash-water from wash-water tank 4.1 within the dishwashing and rinsing apparatus is caused to flow through strainer 43 into suction conduit 40 through pump 38 and then is forced under pressure into wash-water conduit 34 whence it passes through connecting pipe 36 into the lower spray pipes 33 and through connecting pipe 35 into upper wash spray pipes 32. Sprays of water under pressure are thereby directed upwardly onto the dishes in rack 22 from lower spray pipes 33 and downwardly under pressure onto said dishes through upper spray pipes 32. Rinse control cam 88 also was moved in a clockwise direction by movement of lever 123 to the left (Fig. 3) simultaneously with movement of cam 112 in a clockwise direction. The riser 116 on said rinse cam momentarily engages roller on valve operating member 142 causing valve actuating member 142 to pivot in a clockwise direction on pivot 144 which only momentarily opens rinse control valve 57 but member 142 immediately returns to its normally closed position, as shown in Figs. 3 and 6, after riser 116 passes roller 145 as the rinse cam turns in said piston head 83 whic permits the piston to move from clockwise direction from the position shown in Fig. 3 to the position shown in Figs. 7 and 8 to its normal posithe position shown in Fig 6 Also as cam 88 turns in tion as shown in Figs 4 and 5 thereby turning shaft 79 a clockwise direction from the position illustrated in Fig of washing motor 77 in a counterclockwise direction until detent 117 comes opposite roller 137 said roller at rate of speed the cam 112 on said shaft also turns in said t at time dropping into the detent through action of spring direction. Turning of cam 112 in a counterclockwise di- 138, locking member 133 then turning in a clockwise direction moves riser 114 and riser surface 114 in said rection on pivot 138. Rotation of locking member 133 counterclockwise direction, the roller 132 on switch acin said clockwise direction brings roller 136 on arm 134 tuator arm 129 being maintained in engagement with surof the locking member into engagement with cam surface face 114' by action of spring 72 on switch lever 71, which 112 of cam 112 as shown more particularly in Fig. 6. In switch lever 71 bears against plate 131 so as to urge acthis position, locking member 133 prevents counterclocktuator arm 129 in a clockwise direction on pivot 130 wise movement of rinse cam 88. thereby urging roller 132 into engagement with cam 112.

As the rinse cam 88 was turning in a clockwise direc- As cam 112 rotates in a counterclockwise direction, from tion from the position shown in Fig. 3 to the position the position illustrated in Fig. 6 to the position shown shown in Fig 6, a portion of risei 116 engaged the opin Figs 9 and 3 roller 132 moves over surface 11 toposite end 151 of lever 149 moving said lever in a counterward and into detent 115, the actuator arm turning in a clockwise direction on pivot 150 so that the opposite end clockwise direction as the roller 132 moves into detent 115 of lever 149 was caused to engage the spring steel upwhile switch lever 71 moves to the right. As switch lever right 148 slowly moving it to the left until the tip end 71 reaches the full extent of its movement to the right, of lever 149 passes the upright said upright thereafter asas shown in Fig. 9, and roller 132 passes completely into suming the position shown in Fig. 6. detent 115, movable contacts 65 and 66 disengage fixed As cams 112 and 88 are turned in a clockwise direction contacts 67 and 68 interrupting the flow of electrical curfrom the position shown in Fig. 3 to the position shown rent to motor 44 thereby preventing further circulation of in Fig. 6, the various parts of the wash time control hywash water from wash-water tank 41 into the upper and draulic motor 77 and the rinse time control hydraulic molower wash spray pipes 32 and 33, respectively. At this tor 78 are moved from the positions illustrated in Figs. 4 point, the washing cycle is ended. It will be readily and 5 to the positions shown in Figs. 7 and 8. Turning understood that the length of time of the washing cycle of the shafts 79 of hydraulic motors 77 and 78 in a clockis controlled by the rate at which fluid flows through the wise direction likewise turns pinions 80 in a clockwise control inlet port 103 of motor 77 which controls the direction which pinions act upon rack 81 so as to move rate at which shaft 79 and cam 112 turns in a counterpistons 82 and piston heads 83 thereon in a direction to clockwise direction thereby controlling the length of time the left from the position shown in Figs 4 and 5 toward required for roller 132 to pass fiom the position shown in the position shown in Figs 7 and 8 Movement of pis- Fig. 6, in which position electrical current flows from a tons 82 to the left forces fluid from the portion of chamsource through the switch 48 to motor 44 until roller 132 heads 83, the flow of fluid through said passages 91 causoperative position the flow of electrical current through ing ball valves 90 to move into the enlarged portion 92 the switch to the motor is interrupted.

of the passage so that flow of fluid from behind the piston During the turning of cam 112 from the position shown heads 83 to the forward part thereof is permitted. Turnin Fig. 6 to the position shown in Figs. 9 and 3, the tening of the shafts 79 in a clockwise direction rotates collars sion of spring 138 of locking member 133 retains roller 94 in a clockwise direction the dog 96 on said collars en- 136 in engagement with the outer peiiphery 112 of cam gaging dog 97 on lower rotatable collars 98 This causes 12 As roller 136 passes along said periphery it is encollars 98 to turn in a clockwise direction thereby winding gaged by riser 113 on the cam, which riser causes the spring 99 the upper collars 100 being retained against roller and arm 134 of locking member 133 to turn in a movement by pins 101. When the cams 112 and 88 have counterclockwise direction on pivot 138 against the tenreached the full extent of their movement in a clockwise sion of spring 138'. As locking member 133 turns in said direction the pinions 80 have reached the end of racks counterclockwise direction, roller 137 is moved away 81 as shown in Figs. 7 and 8 and further clockwise movefrom wall 118 of detent 117 on rinse cam 88 until, at the meat of shafts 79 and the cams thereon is prevented. peak of riser 113, roller 137 disengages wall 118 of rinse Thusly, the timer mechanism of the present invention cam 88, thereby unlocking said cam so that it may be is operated from its normal inoperative position as illusturned in a counterclockwise direction by action of hytrated in Figs. 3, 4 and 5 to its washing position as shown draulic motor 78. in Figs. 6, 7 and 8. The various parts of the timing Thusly, the timer mechanism of the present invention mechanism are illustrated at the beginning of the washis operated from the beginning of its washing cycle, illusing cycle in Figs. 6, 7 and 8. trated in Fig. 6, to the beginning of its rinsing cycle.

At the beginning of the washing cycle and throughout As the cam 88 moves in a counterclockwise direction, said cycle movement of the main rotating shaft 79 of riser 116 of the cam engages roller 145 on valve operatrinse motor 78 is prevented by engagement of roller 137 ing member 142 which is in the path of movement of said of the locking member 133 with the wall 118 of locking riser, the roller rides along the surface 116 of the riser member detent 117 in cam 88. Shaft 79 of washing hyas the cam turns causing the valve actuator to turn in draulic motor 77, however, is free to turn in a counterclockwise direction on pivot 144. Adjusting screw 144' clockwise direction by the motor, said shaft being turned on member 142 is moved against plunger 139 by moveby the unwinding of spring 99 therein which acts to turn ment of arm 141 which presses valve stem 61 inwardly collar 98 in a counterclockwise direction, the dog 97 on of the valve against the tension of spring 62 causing closaid collar engaging the dog 96 on intermediate collar 94 sure valve 60 to become unseated from valve seat 63 therethereby turning collar 94 in a counterclockwise direction by permitting rinse-water to flow from rinse-water inlet thereby rotating shaft 79 in said counterclockwise direcpipe 55 through the valve and into main rinse conduit tion until the dog 96 engages dog 102 on upper collar 55. This is the rinse position of the timing apparatus of 100 which prevents further movement of the shaft 79. the present invention, which position is shown in Fig. 9. The speed at which shaft 79 is rotated in a counterclock- Rinse-water flows through main rinse pipe 55 into upper wise direction is governed by movement of the piston 82 rinse spray pipe 52 through connecting pipe 54 which and piston head 83 against fluid in chamber 86 to the right causes the upper rinse spray pipe to rotate on center conof the piston head (Figs. 7 and 8). The piston 82 may nection 53 and to spray rinse water downwardly onto the move to the right (Figs. 7 and 8) only upon the escape of dishes in rack 22. Rinse-water also flows into lower rinse fluid from the right of piston head 83 which escape is pipe 56 through connecting pipe 56 which causes the through inlet port 103, the size of the opening of which 8 lower rinse pipe to rotate and project sprays of rinse-water is controlled by inlet port control valve 106. As the fluid upwardly onto said dishes in the rack 22.

to the right of piston head 83 (Figs. 7 and 8) escapes As cam 88 continues to turn in a counterclockwise dithrough inlet port 103 the fluid flows through horizontally rection from the position shown in Fig. 9 to its normal extending liquid passage 104 and outwardly thereof inoperative position as shown in Fig. 3, roller 145 is mainthrough outlet port 105 into chamber 86 to the left of the tained in contact with surface 116' of riser 116 by action of spring 62 on valve stem 61 and the action of the valve motor when said shaft reaches said predetermined posistem on plunger 139, adjusting screw 144 and arm 141 tion to maintain said shaft against turning in said oppoof valve actuator 142. The surface of riser 116 is so site direction when the shaft of the washing time control shaped that in the movement of the cam 88 from the posimotor is turning in said opposite direction, said locking tion shown in Fig. 9 to that shown in Fig. 3, valve actuameans being operative out of its locking position by said tor 142 is permitted to turn on pivot 144 in a counteractuator on the shaft of the washing time control motor, clockwise direction after the peak of riser 116 is past and control means associated with each motor for conpermitting valve stem 61 to gradually move outwardly of trolling the rate of speed at which the shaft of a motor the valve and gradually permit closure valve 60 to move turns in said opposite direction, the actuator on the shaft towards valve seat 63 until in the position shown in Fig. 3. of the washing time control motor being inoperative in Closure valve 60 is thereby seated in the valve seat prerespect to the washing fluid-flow control means when the venting further flow of rinse-water through the valve to shaft of said motor is in its normal position and operative the rinse spray pipes at which time the rinsing operation is in respect to said washing fluid-flow control means so as completed. to operate the washing fluid delivering means when said The operation of rinse hydraulic motor 78, after the shaft is turned in said one direction and so as to maintain movement of roller 137 of locking member 133 out of the washing fluid-flow control means and delivering detent 117, is similar to the operation wash hydraulic means in said operative position as said shaft turns in motor 77 when said motor is operating cam 112 in a the opposite direction and until it reaches said normal counterclockwise direction. That is, the unwinding of position, the actuator also being operative in respect to spring 99 of motor 78 turns lower movable collar 98 said locking means to operate the locking means out of in a counterclockwise direction which, through engagelocking position as the shaft on said washing time conment of dog 97 with dog 96 on the intermediate collar 94, trol motor reaches said normal position, said other actuacauses shaft 79 to rotate in said counterclockwise director being in operative relationship to the valve actuating tion as the spring unwinds. This moves piston 82 to means so as to permit the valve to remain in its closed the right (Figs. 7 and 8) as liquid to the right of piston position when the rinsing time control motor shaft is head 83 escapes from chamber 86 through control inlet in its normal position and to open the valve when said port 103 thereafter to pass through horizontal passage shaft is turned in said one direction from its normal 104 and into chamber 86 through outlet port 105 behind position to an intermediate position and close said valve piston head 83. Likewise, inlet port control valve 106 when the shaft is turned from the intermediate position regulates the flow of fluid into passage 104 from chamber to an abnormal position and permit the valve to remain 86 which thereby regulates the speed of travel of piston in its closed position when the rinsing time control motor 82 to the right (Figs. 7 and 8). This in turn controls shaft is in its abnormal position and to open the valve the rate at which shaft 79 and cam 88 turns in a counterwhen the shaft is turned in the opposite direction from clockwise direction which determines the time which it its abnormal position to an intermediate position and will take for cam 88 to move from the position shown close said valve when the shaft is turned in said oppoin Fig. 9 to its normally inoperative positionshown in site direction from the intermediate position to said nor- Fig. 3 which in turn determines the length of time of the mal position. rinsing cycle. Therefore, control of the rate of flow of 2. The apparatus of claim 1 wherein the motor shafts fluid through inlet port 103 by inlet port control valve have operatively associated therewith means for manually 106 will control the length of time of the rinsing cycle. -10 turning said shafts simultaneously in said one direction Just prior to completion of the rinsing cycle wall 118 and wherein the motors each comprise means for hyof the cam 88 engages the opposite end 151 of lever 149 draulically controlling the rate of speed at which the causing the lever to be pivoted on pivot 150 in a clockwise shafts each turn in said opposite direction. direction. Movement in said clockwise directionof lever 3. The apparatus of claim 2 wherein the means for 149 causes the outer end thereof to bend upright 148 delivering washing fluid to said means for directing the which is of spring steel to the right (Fig. 6) such distance washing fluid comprises a pump, electric motor for drivthat the outer end of the lever will pass the upright 148 ing said pump and wherein the washing fluid-flow conpermitting said upright to be snapped to the left Gig. 9) trol means comprises an electrical switch for controlling so that contacting member 149 strikes bell 146 giving an the flow of electrical current from a source to said elecalarm or signal that the washing and rinsing operation trical motor. are l t d, 4. The apparatus of claim 3 wherein the valve is nor- Inasmuch as various modifications may be made in the mally retained in its closed position by resilient means forms of the invention herein disclosed and in the locaand the timing means is so constructed and arranged as tion and relative arrangement of the several parts of the to actuate the valve into an open position against the invention without departing from the principles thereof, tension of said resilient means, maintain the valve in it will be understood that the invention is not to be limited said open position for a predetermined period of time to excepting by the scope of the appended claims. permit flow of fluid to said rinse directing means, and wh i l i d is; permit said resilient means to move the valve to its closed 1. Control apparatus for controlling the time of washposition at the expiration of said period of time. ing and rinsing dishes in a dishwashing and rinsing ma- 6O 5. Control means for dishwashing and rinsing apparachine having an area in which dishes are washed and tus which apparatus has means for delivering washing thereafter rinsed which machine has means for d recting fluid under pressure onto dishes to be washed, washing washing fluid onto the dishes, other means for direct1ng fluid-flow control means for controlling the operation of rinsing fluid onto the dishes, means for deliver ng washsaid washing fluid delivering means, valve means for ing fluid under pressure to said means for dir cting wash- 6 controlling the flow of rinsing fluid onto said dishes after ing fluid, washing fluid-flow control means for controlling the dishes have been washed, and valve actuating means the operation of said washing fluid delivering means, valve for opening and closing said valve, the control means means for controlling the flow of rinsing flui to said comprising a washing time control motor and a rinsing rinse fluid directing means, and valve actuating means for time control motor each motor having a rotatable shaft, opening and closing said valve, wh ch ntrol apparatus an actuator on the shaft of the Washing time control Comprises timing means operatively associated With aid motor operatively associated with the washing fluid-flow washing fluid-flow control means and with said valve 510- control means, another actuator on the shaft of the rinstuating means, said timing means comprising a washing ing time control motor and operatively associated with time control motor and a rinsing time control motor each said valve actuating means, means for simultaneously motor having a rotatable shaft, an actuator on the shaft turning the shafts of said motors in one direction from a of the washing time control motor operatively associated normal position to a predetermined position, means operwith the washing fluid-flow control means, another actuaatively associated with the shaft of each motor so as to tor on the shaft of the rinsing time control motor and turn each shaft from said predetermined position to its operatively associated with said valve actuating means, n rmal po ition, locking m n operative on th h f means for simultaneously turning the shafts of said motors of the rinsing time control motor when said shaft reaches in one direction from a normal position to a predetersaid predetermined position to maintain said shaft against mined position, means operatively associated with the turning in said opposite direction when the shaft of the shaft of each motor so as to turn each shaft from said washing time control motor is turning in said opposite predetermined position to its normal position, locking direction, said locking means being operative out of its means operative on the shaft of the rinsing time control locking position by said actuator, and control means containing cylinder,

is in its normal position and operative in respect to said 9. Th

delivering means in said operative position as said shaft turns in the opposite for deliverin tion as the shaft on said washing time control motor said outlet of the fl adjustable valve. ntrol means of c said inlet to comprises an 10. The co until it reaches said normal position, i 12. The control means 0f claim 11 wherein the 6. The apparatus of claim 5 wherein the motor shafts m 8 wherein the fluid laim 9 wherein the means g washing fluid to said means for directing fluid comprises a pump, electric motor for washing fluid-flow control means comprises an electrical switch for controlling the flow of electrical current from a source to have operatively associated therewith means for manual- 5 comprises one cam and the other actuator on the shaft of 1y turning said shafts simultaneously in said one direction the rinsing time control motor comprises a second cam,

shafts each turn in said opposite direction. time control motor shaft in its said one direction a riser 7. The control means of claim 5 wherein the means for delivering washing fluid to said means for directing the washing fluid comprises a pump, electric motor for driving said pump and wherein the washing fluid-flow control means comprises an electrical switch for controlling the flow of electrical current from a source to said electrical motor.

8. Control means for dishwashing and rinsing apparatus which apparatus has means for delivering washing fluid under pressure onto dishes to be washed, washing fluid-flowpontrol means for controlling the operation of control motor each comprising a rotatable shaft, (-1 fluid a piston having reciprocal movement in the cylinder, said shaft and said piston being operatively associated so that when said shaft is turned means operatively associated with the shaft of each tion. motor so as to simultaneously turn the shafts in said one direction from their normal position to their predetermined position, shaft actuating means operatively associated with each motor shaft to actuate its respective shaft in said opposite direction only, each motor having 1,452,710 a fluid-flow control passage with an inlet in communica- 1,466,192 tion with the cylinder at a point ahead of said piston in 1,581,134 the direction of its movement in said opposite direction 1,662,496 and an outlet in communication with said cylinder be- 1,920,973 hind the piston in the direction of said movement in the 1,921,740 opposite direction, fluid-flow control means for con- 2,000,367 trolling the flow of fluid from said inlet to the outlet 2,597,359 the motor having another fluid passage in communication 2,598,074

References Cited in the file of this patent UNITED STATES PATENTS Schmelzer Apr. 24, Schmelzer Aug. 28, Merseles Apr. 20, Forsgard Mar. 13, Dinzl Aug. 8, Foote Aug. 8, Williamson May 7, McDonald et al. May 20, Sadwith May 27,

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