US2170307A - Water-control system for machines for washing drinking vessels - Google Patents

Description

g 1939- w. F. OHME ET AL 2,170,307

WATER-CONTROL SYSTEM FOR MACHINES FOR WASHING DRINKING VESSELS Original Filed Aug. '23, 1934 3 Sheets-Sheet I Fi i amen Wow Wa/ter' F Ohme and 4 739/ C. Steph n Aug. 22, 1939. w. F. OHME ET AL WATER-CONTROL SYSTEM FOR MACHINES FOR WASHING DRINKING VESSEL-S Original Filed Aug. 25, 1954 3 Sheets-Sheet 2 zlvwe/wbo vs Wa/zer' F Ohme and Re y Cffitephcm 334;, W0 %f Patented Aug. 22, 1939 PATENT OFFICE WATER- CONTROL SYSTEM FOR, MACHINE S FOR WASHING DRINKING VES SELS Walter F. Ohme and Ray C. Stephan, Minneapolis, Minn, assignors to North Star Specialty & Manufacturing Company, Minneapolis, Minn., a corporation of Minnesota Original application August 23, 1934, Serial No. 741,078. Divided and this application October 7, 1936, Serial No. 104,474

Claims.

Our invention relates to machines for washing drinking vessels and particularly to the Water control system therefor.

An object of the invention resides in providing 1 a system by means of which all of the functions of the machine may be readily controlled.

Another object of the invention resides in providing a machine utilizing both hot and cold Water and in which both the hot and cold water may be simultaneously turned on or shut off.

A still further object of the invention resides in providing a shut off valve mechanism for the machine utilizing two valve seats and valve heads cooperating therewith and a single operating member for simultaneously moving said valve heads into or out of engagement with said valve seats.

Another object of the invention resides in providing separate constant pressure regulating Valves for the hot and cold Water whereby the required pressure for both the hot and cold Water sprays may be accurately maintained.

An object of the invention resides in providing a control valve whereby either hot or cold water i may be delivered to one set of sprays.

A feature of the invention resides in providing a tray with a revoluble rack disposed above the same and in spaced relation thereto and in arranging the constant pressure regulating valve and the control valve as well as certain of the sprays within said space.

An object of the invention resides in constructing the parts so as to require a minimum height whereby the rack can be disposed in close prox- 3 lmity to the tray.

Other objects reside in the novel combination of parts and in the arrangement of the valves and in the specific construction of the same as disclosed in the accompanying specification and drawings.

In the drawings:

Fig. 1 is a medial elevational sectional view of a machine for washing drinking vessels and illustrating an embodiment of our invention.

Fig. 2 is a plan sectional View taken on line 2-2 of Fig. 1 with portions thereof broken away to show the construction of other portions there- Fig. 3 is a fragmentary plan sectional view taken substantially on line 33 of Fig. l and. drawn to a larger scale.

Fig. 4 is an elevational sectional View taken on line 4-4 of Fig. 3.

Fig. 5 is an elevational sectional view taken on line 5.--5 of Fig. 3.

This application for patent is a division of our copending application for patent for Machine for washing drinking vessels, Serial Number 741,078, filed August 23, 1934.

Our invention is particularly adapted for use in conjunction with a machine for washing. drinking vessels and the same has been illustrated as applied thereto. Since certain details of construction of the machine do not form any part of the instant invention, only so much of the machine as will be needed to explain the instant invention will be described, the original application being relied on for disclosure of the remainder of the machine.

The machine for washing drinking, vessels herein illustrated comprises a housing which We have indicated in its entirety by the reference character A and in which our improved water control system is utilized. The washing mechanism of the invention comprises a revoluble rack B which is driven through a Water motor C. In addition thereto, a spraying device D is utilized which is adapted to spray hot and cold water on the drinking vessels carried by the rack as the same rotates past the sprays. The invention comprises a water control system E forming the subject matter of this invention and by means of which the flow of water to the spraying device D and the motor C can be regulated and by means of which the water may be maintained at predetermined pressures at the various sprays and motor. These various parts will now be more fully described.

The housing A consists of a tray l0 circular in form which is constructed with a bottom I I having a rim [2 extending upwardly therefrom. The bottom II is preferably sloping toward the for- Ward portion of the tray Where a drain l3 is provided by means of which the water discharged into the housing may be removed from the device. At the outer margin of the bottom l l is provided a ledge I4 which elevates the bottom I l above the surface on which the machine rests. This ledge may, if desired,.be formed in continuation of the rim l2 of said tray. The tray I0 is constructed as a casting or the same may be spun from sheet metal or constructed in any other suitable manner. The housing A further comprises a circular wall l5 which is secured to the rim of the tray l0 and extends upwardly therefrom. The lower edge of this wall rests in a recess I! formed in said 'rim. Thewall I 5 is preferably attached to said rim through small bolts l6 which pass through suitableopenings in both said rim and wall. Upon the upper end of the wall I5 is placed a cover or closure it which is circular throughout the extent thereof. This closure is provided with a flange 28 which extends downwardly therefrom and which terminates at its lower end in a lip 2! by means of which the closure may be secured to the wall it. This is accomplished through bolts 22 which pass jointly through said wall and lip the same as the bolts 5. The wall [5 is of lesser circular extent than a complete circle so that an opening 23 is provided at the front of the housing through which access may be had to the interior thereof and to the drinking vessels placed upon the rack B mounted therein.

The rack B consists of a table 24 which is constructed with a number of circularly disposed concentrically arranged rings 25, 2? and 26. These rings are connected together through radially extending bars 26 to form a reticulate structure on which the drinking vessels or other dishes to be washed may be placed. The rings 25, 2? and 28 and are bars 26 all lie in a common, horizontal plane so as to form a suitable support fer the drinking vessels. The outer ring 2? is provided with an upwardly extending flange 29 by means of which the drinking vessels are held upon the rack.

The table 24 is rotatably supported on a spider 3! which comprises a central tubular hub 32 connected to a circular flange 3Q through radially extending arms 33. The hub of this spider has mounted in it ball bearings 34 and 35 which are disposed at the upper and lower ends thereof. In thecenter of the bottom H of tray ii] is provided a boss 36 which has secured to it through a set screw 3'! an upwardly extending post 38. Post 38 is turned to receive the inner races of the two bearings 34 and 35. By means of the two bearings 34 and 35 the spider 3! is rotatably mounted. A cap 39 secured to the upper end of the hub 32 covers the bearings 36 and prevents the entry of water into said bearings from above. The table 24 rests upon arms 433 extending outwardly from the flange 30 of spider 3| and is centered with respect to the axis thereof through said flange.

The flange 3! similar to flange 29 extends upwardly above the surface of the table 2 5 to hold articles positioned thereon. in place. To further serve this purpose a guard 229 is employed which is constructed from sheet metal bent in cylindrical form with a curvature substantially equal to the curvature of the flange 36. This guard is bolted to a mounting 238 by means of bolts 23! and may be easily removed when access into the interior of the machine is desired. Mounting 230 may be soldered or otherwise secured to the cover I8.

The water motor C and the power transmission associated therewith are illustrated in Figs. 1 and 2. This part of the invention includes a frame til which comprises two spaced parallel bearing plates 4! and 42 held in spaced relation through posts 43. These posts are riveted to the plate t2 and the plate 4! is secured to said posts through screws M threaded into said posts. In the two plates 4! and 32 are mounted two self-lubricating bearings 45 which are attached to said plates in any suitable manner. In the bearings 45 is rotatably mounted a shaft 5!]. Shaft 5% has attached to it a water wheel 5!. This wheel is constructed from a sheet of metal which is arranged to form a back 52 which is cut at its outer periphery to provide a plurality of blades 53 extending substantially radially with respect to the wheel. The shaft 50 drives another shaft 6| (Fig. 1) through a gear train 55 consisting of a number of arbors pivoted between the plates 4| and 42 and carrying intermeshing gears and pinions'. Such construction forming no particular feature of the instant invention has not been shown in detail, applicants original application for patent from which this application is divided being relied upon for disclosure thereof.

The shaft 6! is mounted for rotation in bearings formed in the two plates 4! and S2. The upper end of the said shaft projects above the plate ll and has attached to it a friction pinion 62. This pinion comprises a core 63 on which a short section of a rubber tube (it is applied, which tube is held in position on said core through a screw 65 threaded into said core. When the screw 65 is properly tightened, the tube 64 is held from movement and the pinion 62 functions in the desired manner.

The frame M3 is mounted for swinging movement relative to the bottom II of tray in the following manner: Extending through the two plates 4| and i2 is a bolt 56 which is screwed into a boss 68 formed on the bottom M. This bolt supports the entire frame for swinging movement clear of the bottom it. The frame 48 is urged outwardly through a tension spring 69 which is attached at one end to the plate 42 and at its other end to an angle member 10 serving as a spring anchor. This angle member is attached to the bottom it in any suitable manner. The arms 33 of spider iii are disposed toward the upper end of the flange 30 leaving the inner surface of said flange indicated at E3 unobstructed. The portion of the flange 36 having the surface it constitutes a friction gear with which the friction pinion 62 may engage. This gear is designated in its entirety by the reference numeral 14. From an inspection of Fig. 2 it will be noted that the pinion 52 is disposed at such an elevation as to engage the surface E3 of gear 14. Through the action of the spring 89 the pinion 62 is urged into frictional engagement with gear 14 and rotation of the rack B through the action of the water motor C is procured.

The water motor C further includes a nozzle 15 which is connected with a source of supply of water and which is attached to a mounting 216. The nozzle '55 is fixed in position and is. adapted to direct a stream of water tangentially upon the blades 53 of the water wheel This causes the wheel 5! to rotate and gear 62 is correspondingly rotated at a reduced rate of speed through the action of the gear train 55. Due to the fact that the nozzle 15 is directly supported on the tray H a rigid pipe connection may be utilized for supplying water to the same and frame as on which the motor C is supported may swing freely to bring the pinion 52 into proper frictional engagement with its corresponding gear E i without interference. This eliminates a flexible water pipe or flexible connection for the motor.

For the purpose of spraying water upon the glasses carried on the rack B the spraying device D is used. This spraying device comprises two spray units It and Tl. Spray unit 15 is disposed below the rack 13 and spray unit 11 is situated above said rack.

The spray unit it consists of an arcuate hollow manifold 18 which is constructed in two parts 57 and 58. The part 53 has three laterally extending branches T9, 89 and ti, and the two parts are connected together by means of a neck 82. In the middle of the neck 82 is provided a partition 83 which separates the two parts 51 and 58, providing two separate chambers 86 and 81 within the interior of the manifold. In the center of this partition is formed an opening 59 which extends along said partition. A heat insulating block 60 is disposed in this opening and retards the passage of heat from each of the parts 51 and 58 to the other. At suitable localities on the parts 51 and 58 of the manifold 16 and at the ends of the branches 19, 80 and 8I are provided sprays 88 which are adapted to direct fine sprays of Water upwardly for the purpose of washing the vessels placed upon the rack B from beneath said vessels. Thesesprays and the sprays used with spray unit 11 are all constructed in the same manner and only one of said sprays will be described in detail which is best illustrated in Fig. 2.

On the manifold 18 at the required locality is provided an upwardly extending boss 84. This boss is constructed with an opening 35 passing through the same and communicating with the chamber 86 within the manifold. The boss 34 is threaded upon the exterior to receive a screw cap 00. Cap 90 is preferably formed from sheet metal and is constructed with a number of openings 9| through the same and through which the water passes in fine streams.

The upper spray unit 11 is constructed similarly to the unit 16, and since the same forms no feature of the invention said unit will not be described in detail. This unit is, however, constructed with two parts separated from one another and similar to the parts 51 and 58 of the unit 16.

The two spray units 16 and 11 are supported in the following manner: Attached to the rim I2 of tray I0 is an upright 96 formed of sheet metal which is bent to provide a back 91 and two outwardly extending flanges 98. This upright is bolted to a rectangular lug 99 formed on the said rim which projects inwardly into the pan I0. For this purpose a bolt II is employed which extends jointly through said lug, rim and upright. The flanges 98 engage this lug and hold the upright in proper position. Upright 96 serves to support both the lower and upper spray units 16 and 11. The lower unit 16 is threaded to receive a machine screw I02 which passes through the said back 01 of the upright 36 and which is screwed into unit 16. The unit 11 is similarly attached to the upper end of the upright 96 through another screw I03, which passes through the back 91 of said upright and which is threaded into the neck II3 of the unit.

For the purpose of shutting off the hot and cold water to the sprays, a shut oil valve mechanism I04 is employed which is mounted at the front of the tray I0. Upon the interior of the tray is provided a control valve I06, which is disposed directly opposite the valve mechanism I04. The valve mechanism 504 includes a valve housing I05 and the control valve I 06 includes a housing I01. These two housings are attached to the rim I2 of tray I0 in the following manner: Upon the valve housing I01 are formed two lugs I08. Two cap screws I I0 pass through these lugs and through a flattened portion I69 of the rim I2 and are threaded into the housing I65 of the valve mechanism I04. Gaskets I II disposed between said housings and the flattened portion I66 of tray I0 form a tight connection between the various parts. The interior of the valve housing I05 is constructed to provide two valve chambers H2 and H3, which have passageways I I4 and I I5 leading therefrom. These passageways communicate with passageways H6 and H1 in the portion I09 of the tray I0. Said latter passageways in turn communicate with two passageways H8 and H9 in the valve housing I61, which will be subsequently more fully described. The housing I05 includes two threaded bosses I2I and I22, which have screwed upon the ends of the same caps I23 and I 24, which have formed within. them chambers I25 and I26. The said housing is tapped at I21 and I20 to receive two pipes I23 and I30, which furnish cold and hot water respectively to the device. Passageways I3I and I 32 lead from the two pipes I29 and I30 to the chambers I25 and I26, and conduct the cold and hot water into said chambers.

For closing communication between the chambers I25 and I26 and the passageways H2 and H3, respectively, two valves I33 and I34 are employed. Inasmuch as both of these valves are identical in construction, only the valve I33 will be described in detail. This valve includes a valve stem I 35, which is threaded to receive two nuts I36 and I31. Mounted upon the valve stem and between the two nuts I36 and I31, is a conical shaped rubber stopper I38, which is adapted to engage a seat I39 in the lug I2I at the end of the passageway II2. When the valve I33 is drawn inwardly, the stopper I38 engages the valve seat I39 and closes communication between the passageway I3I and the passageway II4.

For operating the two valves I33 and I34 a rotating shaft MI is employed, which has formed on the end of it a head I42. This shaft is further provided with a shank I43, which is journaled in a bushing I44. Bushing I44 is adapted to screw into a threaded bore I45 in housing I05 and against a compression gasket I46, which encircles the shaft MI and engages the upper surface of the head I42, thereby forming a tight joint between said shaft .and housing. To remove any water which might leak past the gasket I46, an annular chamber 24I is formed in the bushing I44 which encircles the spindle I43. This chamber communicates through drilled openings 242 with another annular chamber 243 which is formed upon the exterior of the bushing I44. A passageway 244 through the valve housing I06 and rim I2 communicates with chamber 243 and conducts the leakage from the valve stem back into the tray I0 where the same is discharged from the device through drain I3. A handle I41 is secured to the outwardly protruding end of the shank I43 and serves as a means for rotating the shaft I4I. Upon the underside of the head I42 are provided two depending pins I48 and I49, which are spaced from one another and are eccentrically located with respect to the axis of the shaft. The two valve stems I of the valves I33 and I34 are provided with connections I5I and I52, which are secured to said valve stems and which are drilled to receive the two pins I48 and I49. By means of this construction the two valves I33 and I34 may be simultaneously operated to open or close both the hot and cold water passageways.

The control valve I06 includes a rotatable valve member I53, which is preferably conical in form and which fits snugly within a conical bore I54 in valve housing I01. This valve member is constructed with a T-shaped passageway I55, having branches I56 and I51 in alignment with one another, and with a branch I58 at right angles to the branches I56 and I51. The cold water passageway I I8 extends up to the bore I 54. Two other passageways I6I and I62 are provided, which also extend up to the bore I54. Passageway I62 communicates with the passageway II9. Cold water may travel from the passageway H8 through branch I56 of the passageway I55 through branch I59 thereof, and into passageway I91 from which the same is led to the cold water sprays and the motor. At the same time hot water may flow from passageway II9 to the hot water sprays. When the valve member I53 is rotated clockwise through an angle of ninety degrees, passageway I I8 is shut off and passageway I6I brought into communication with passageway I62 through the two branches I56 and I51 of passageway I55. With the partsso arranged hot water is led into all of the nozzles and also to the water motor. For manipulating the valve member I53, a handle I69 is provided which is directly attached to the same upon the exterior of the valve housing.

As previously stated, the pressure of the water furnished at the spray nozzles and motor is controlled through a constant pressure regulating valve mechanism, indicated in its entirety by the reference numeral I64. This valve mechanism includes a valve housing I65, formed with a flange I66 at one end thereof. The valve housing I65 is bolted to the valve housing 491 through bolts 161, which extend through the flange I86 and are threaded into a similar flange I68 formed on the housing l91. The construction of the valve mechanism M4 is best shown in Fig. 3. Valve housing I65 has two bores HI and I12 therein. These bores communicate directly with the passageways I6I and H9 in the valve housing I91, whereby cold and hot water respectively are introduced into said bores when the valve mechanism Hid is opened. Within these bores are mounted for reciprocation two pistons I13 and I14. Valve housing H is provided' with two bosses I16 and I11, which are formed with passageways E18 and I19. These passageways lead directly to the bores Ill and I12 and serve to direct the fluid consumed by the device to the proper outlets. The two pistons I13 and I14 within the bores I1! and I12 are constructed in identically the same manner and also function and operate in the same manner. For this reason only the piston I13 and its associated structure will be described in detail. Piston I13 is constructed at its lower end with a cavity I8I. A port E82 extends through the wall of the piston and is adapted to bring the passageway I18 into communication with the cavity I8I. Said cavity being open at the lower end, brings the port I82 into communication with the lower end of the bore I'll, which is in communication with passageway 16E. Through the piston I13 a chamber I93 is formed in bore I1I above said piston. This chamber is brought into communication with the passageway I18 through a bypass I98 formed in the housing I65. When the valve body I53 is in the position shown in Fig. 3, cold water is led into the regulating valve and discharged through port I82 into passageway I18, where it feeds the various outlets connected to said valve. The piston I13 is guided for movement within the bore through a pin I83 extending through the housing I65, which pin operates in a slot I84 in said piston. By means of this construction the piston is held from rotation and the movement of the piston at the end of its stroke is limited. The other end of the piston is provided with a socket I85, in which is seated a coil spring I86. This coil spring is seated at its other end against a cap I81. Cap I81 is formed with a socket I88 in the center thereof and is provided at its edge with a flange I89, adapted to form a seat against which the upper end of the spring I86 may bear. A set screw I9I is threaded in the housing I65 and extends into and engages the cap I81 in the socket I88. A lock nut I92 is placed upon the set screw I9I and engages the outer surface of the housing I65 holding the set screw I9I in adjusted position. By manipulation of said set screw the pressure on the spring I86 may be varied so as to procure any desired regulation of pressure. Below the piston I13 is a stabilizing spring 286 which cushions the movement of the piston and causes the regulating device to act smoothly. The piston I14 previously referred to is constructed and controlled in the same manner as the piston H3 and regulates the pressure of hot water, which enters the cylinder I12 through the passageway H9.

The operation of the constant pressure regulating valve is as follows: Assume that the valve mechanism I04 is shut off. Spring I86 then urges the piston I13 downwardly until the pin I83 terminates the movement thereof. The opening through port I82 is then shut off. If now the valve mechanism I94 is turned on, the water is directed into the bore I1! and piston 513 is raised upwardly, which permits the water to flow into passageway I18. Water continues to flow in this passageway until a pressure is built up, which is transmitted by the bypass I94 to the chamber I93. This pressure of the water on this side of the piston together with the effort of the spring 86 tends to balance the pressure upon the underside of the piston through the water pressure in the water pipe. As the pressure in the passageway I18 varies, piston I18 moves up and down cutting off and on the water supply so as to maintain a constant pressure.

For the purpose of leading water to the various sprays, two flexible tubes I95 and I96 are employed which are connected by means of tube connections l91 and I98 to the two bosses I16 and I11 formed on the case I65. The tube I95 is directly connected to the mounting 216 and to nozzle 15 carried thereby. A branch tube I99 is also connected to the tube I95 and is connected by means of a tube connection 280 to a boss 29I formed on the part 51 of manifold 18 of the lower spray unit 16. This boss is so situated that tube i99 communicates with chamber 86 within the same. Tube I96 is similarly connected by means of a tube connection 399 to a boss 202, formed on the part 58 of said manifold by means of which said tube is brought into communication with the chamber 81 of said manifold. The two corresponding chambers of the upper manifold of spray unit 11 are connected to the chambers 86 and 81 by means of two vertically extending tubes 203 and 284, which extend along the upright 96 and are protected and guarded thereby. These tubes are connected to the manifold 18 and the manifold of the upper spray unit 11 in the same manner as the tubes I99 and I96. In this manner water is delivered from the lower spray unit to the upper spray unit, hot water being provided on the right hand side, and cold water on the left hand side.

The operation of the invention is as follows: In starting the device, the valve body I53 is left in the position shown in Fig. 3. As soon as the handle I41 is turned in the proper direction, both the valves I33 and I34 are opened, leading water into the device. The cold water flows through the passageways H4, H6 and H8, through the branches I56 and I58 of passageway I55, through passageway IBI, bore I'II, cavity I8I, port I82, passageway I18 and tube I95 to the motor nozzle I5. Water leaving this nozzle causes the wheel 5| to rotate, which sets in motion the train of gearing, causing the friction pinion 62 to rotate at a slow rate of speed. Through the action of spring 69 this pinion is urged against the friction gear M, which causes the rack B to rotate in'a counter-clockwise direction as viewed in Fig. 2. Cold water at the same time passes through the tubes I99 and 203 and into the chambers of the two spray units 16 and TI. The hot water passes through the passageway H5, passageway II'I, passageway H9, into the bore I'IZ, cavity NH, and port I82 of piston I14 and from there through the passageway I19 and tubes I96 and 264, to the chambers 81 of the spray units I6 and TI. This causes sprays to be directed upwardly and downwardly from the nozzles attached to said units. If now glasses are placed upon the rack B in inverted position, said glasses are caused to travel through the sprays and are washed both within and with out.

Inasmuch as glasses are frequently desired for immediate use, it becomes desirable to cool the same. Therefore the cold water sprays are used which chill the glasses before the same are removed from the rack. When the glasses. appear opposite the opening in the housing A, the same may be again withdrawn. If the operator should fail to remove the glasses, no particular harm. is done, as the glasses merely go through the machine a second time and are further sprayed. When it is desired to wash the glasses solely with hot water, the handle I63 may be turned. so that the valve member I53 is arranged in a position at right angles to that shown in Fig. 3. Hot water is then directed to all of the nozzles. and to the motor and the glasses washed exclusively by hot water.

Our invention is highly advantageous in that an extremely practical device is provided whereby the functioning of the various parts of a machine for washing drinking vessels may be positively and accurately controlled. With our invention the proper pressure is maintained both for the cold and hot water so that the sprays operate with the desired amount of force to procure the best washing efiect and so that the motor operates at a uniform rate of speed. By means: of this construction, waste of water is prevented. The motor is designed for relatively low pressure so that the machine operates under pressures such as are available with ordinary municipal water systems; Both the hot and cold water are shut off by a single valve so that the operator has merely one valve to consider in starting and stopping the machine. With our invention hot or cold water as desired may be delivered to certain of the sprays, whereby more rapid washing of the drinking vessels can be procured where cooling is not required. This: also permits of rapidly running the drinking vessels through the machine. The parts of our invention are arranged in a manner to be extremely convenient for manipulation. By the disposition of the parts all of the operating parts are disposed beneath the rack where the same. are out of the way.

Changes in the specific form of our invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of our invention.

Having described our invention, what we claim as new and desire to protect by Letters Patent is:

1. In a machine for washing drinking vessels,

a support, a rack rotatably mounted on said support, a water motor for driving said rack, hot and cold water sprays for washing vessels carried by said rack, a cold water conduit connected to the cold water sprays and to said motor, a hot water conduit connected to said hot water sprays and separate regulating valves in each of said con.- duits for independently controlling the pressures of the hot and cold water and a valve structure for simultaneously shutting ofi the flow of water in said conduits.

2. In a machine for washing drinking vessels, a support a rack for drinking vessels movably mounted on said support, cold water sprays, hot water sprays, said sprays being positioned adjacent said rack to discharge water upon said drinking vessels, a water motor positioned adjacent said rack and. driving the same, a cold water con duit for feeding the cold water sprays and water motor, a hot water conduit for feeding the hot water sprays, separate valves in said conduits and separate pressure controlled means for operating said valves.

3. In a machine for washing drinking vessels, a housing, a cold water spray within said housing, a hot water spray within said housing, a rack for supporting drinking vessels disposed within said housing and movable past said sprays, a control valve within said housing having a body provided with a cold water passageway and a hot water passageway, a conduit connecting said cold water spray with said cold water passageway, a conduit connecting said hot water spray with said hot water passageway, said valve including a movable valve member having a ported chamber, said cold water passageway communicating with said ported chamber, and an auxiliary passageway leading from said hot water passageway communicating with said ported chamber, said valve member in one position causing hot water to be delivered to the hot water conduit and cold water to be delivered to the cold water conduit and in another position causing hot water to be delivered to both conduits.

4. In a machine for washing drinking vessels, a tray, a rack rotatably mounted above said tray, a hot water spray and a cold water spray, said sprays being positioned to wash vessels carried by the rack, a water motor carried by the tray for driving said rack, hot and cold water supply conduits, a casting carried by said tray and having two valves therein connected to said conduits for shutting off the flow of hot and cold water, a control valve for controlling the flow of hot water to said motor and certain of said sprays, said control valve being attached to said shut off valves and communicating with said shut off valves, two constant pressure regulating valves connected to and carried by said control valve, one of said valves communicating with said cold water sup ply and the other with the hot water supply, a conduit connecting said cold water constant pressure regulating valve with said cold water spray and motor and another conduit connecting said hot water constant pressure regulating valve with said hot water spray, said valves delivering water under predetermined pressure to said motor and sprays.

5. In a machine for washing drinking vessels, a support, a rack rotatably mounted on said support, a water motor for driving said rack, a hot Water spray and a cold water spray for Washing vessels carried by said rack, hot and cold water conduits furnishing hot and cold Water to the machine, two shut oiT valves in said hot and cold water conduits, a casting connected to said valves, said casting having hot and cold passageways therein, a control valve in said casting controlling the flow through the cold water passageway, constant pressure regulating valves communicating with both of said passageways, said control valve having passageways operating in conjunction with the passageways in said casting and adapted in one position to direct hot water to one of said constant pressure regulating valves and cold Water to the other and in its other position to direct hot Water to both of said constant pressure regulating valves, a conduit leading from the hot water constant pressure regulating valve to one of said sprays and another conduit leading from said cold water constant pressure regulating valve to said Water motor and to the other of said sprays.

WALTER F. OHME.

RAY C. STEPHAN.

CERTIFICATE OF CORRECTION.

Patent No. 2,170, 07. August 22, 19 9.

WALTER F. OHME, ET AL.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 5, sec-- 0nd column, line 59, claim 1;, strike out the word "hot"; page 6, first col-- umn, line 7, claim 5, after "cold" insert water; and that the said Letters Patent shouldbe readwith this correction therein that the seme may conform to the record of the case in the Patent Office.

Signed and sealed this 5rd day of October, A. D. 1959.

Henry Van Arsdale, (Sea1) Acting Commissioner of Patents

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