US2100343A - Fluid actuated device - Google Patents

Description

Nov. 30, 1937. o MAYCEN 2,100,343

FLUID ACTUA'IED DEVICE Filed June 10, 1933 4 Sheets-Sheet l IgVENTOR AT ORNEY Nov. 30, 1937. o. MAYCEN 2,100,343

FLUTD ACTUA'IED DEVICE Filed June 10, 1933 4 Sheets-Sheet 2 AT ORNIEY Nov. 30, 1937. MAYCEN FLUID ACTUATED DEVICE Filed June 10, 1935 4 Sheets- Sheet s AT RNEY Nov. 30, 1937. o. MAYCEN FLUID ACTUATED DEVICE 4 sheets -sheet 1 Filed June 10, 1933 ATT DML-v Patented Nov; 30, 1937 PATENT OFFIE FLUID ACTUATED DEVICE Othmar Maycen, New York, N. Y., assignor to Clarence N. Wheeler, Glen Ridge, N. J,

Application June 10, 1933, Serial No. 675,193

24 Claims.

This application is related to my prior application Serial No. 443,861 filed April 12, 1930, upon dish washers, and the present application includes all subject matter which was disclosed, as well as subject matter that was not embodied, in said prior application. More particularly the invention relates to a dish washer having a novel and improved water-spraying'or distributing unit to be mounted in a cabinet or casing and including a spraying nozzle which travels back and forth across the casing to spray the water over the dishes, and is movable by and with a power actuated device or impeller, especially a water wheel which is actuated by the fluid that issues from the fluid supply pipe or nozzle so that the same fluid may be utilized for driving the fluid actuated impeller and for spraying or sprinkling purposes.

One object is to provide a novel and improved fluid sprinkling and distributing unit including a 20 screw shaft and a traveling nut thereon, a power operated means connected to and movable with the nut for relatively rotating said screw shaft and nut, and a fluid spraying nozzle movable by and with said nut.

Another object is to provide a sprinkling and distributing unit of the character described wherein a fluid actuated device or impeller is rotatably mounted directly on and rotates coaxially with a screw rod or screw threaded shaft to move longitudinally of the latter, and said fluid actuated device moves a fluid supply pipe or nozzle which supplies fluid both for actuating the fluid actuated device and for spraying or sprinkling, whereby the direct and coaxial connection of the 3 impeller to the screw enables the impeller to be actuated with small power, for example, that supplied from an ordinary dwelling house water supply system.

Further objects are to provide such a fluid 4o sprinkling distributing unit including novel and improved means for automatically causing movement of said fluid actuated device alternately in opposite directions to produce a back and forth movement thereof; to provide for this purpose, means including said fluid supply nozzle for automatically directing fluid jets alternately to opposite sides of the periphery of said fluid actuated device; to provide a fluid supply nozzle having two outlets one at each side of the periphery of said fluid actuated device, and means cooperating with said nozzle so as to direct fluid alternately from said outlets upon said fluid actuated device; and to provide an oscillatory nozzle having two outlets to direct fluid jets alternately on opposite sides of said fluid actuated device upon oscillation of the nozzle, and means for oscillating the nozzle.

Other objects are to provide a fluid sprinkling and distributing unit of the character described which shall be small, compact, inexpensive in construction and simple, reliable, and ready for installation to various purposes; to provide such a unit which can be started and stopped by simply opening and closing a single valve, for example a faucet on a kitchen sink; to provide a novel and 10 improved combination of such a unit and a soap receptacle whereby the water passing from said supply pipe to said nozzle will pass through the receptacle and mix with soap therein; to provide novel and improved means for deflecting or breaking into a, spray the fluid that issues from a fluid supply nozzle; to provide such a unit which can be operated with fluid at low pressures, for example fluids at pressures ordinarily supplied in municipal water supply systems for dwelling houses; and to obtain other advantages and results as will be brought out by the following description.

Referring to the accompanying drawings in which corresponding and like parts are designated throughout the several views by the same reference characters,

Figure 1 is a vertical longitudinal sectional view through a dish washing machine embodying my invention.

Figure 2 is a transverse vertical sectional View on the line 2-2 of Figure 1.

Figure 3 is a fragmentary horizontal sectional view on the line 3-3 of Figure 1.

Figure 4 is an enlarged fragmentary transverse vertical sectional view on the line 44 of Figure 2.

Figure 5 is an enlarged fragmentary transverse sectional view on the line 5-5 of Figure 1, showing the inlet and outlet of the soap receptacle.

Figure 6 is a bottom plan view of the parts illustrated in Figure 5.

Figure '7 is a side elevation of another form of fluid sprinkling and distributing unit. 45

Figure 8 is a bottom plan view of the device shown in Figure '7.

Figure 9 is a transverse sectional view taken on the line 9-9 of Figure '7.

Figure 10 is an enlarged fragmentary sectional view taken on the line i ll-l0 of Figure 9.

Figure 11 is a transverse vertical sectional view on a scale similar to Figure 10 taken on the line HIl of Figure 8.

Figure 12 is a fragmentary vertical longitudiuting unit which is shown as including two approximately parallel guide rods 2 and 3 the latter of which is screw threaded or in the form of a helical or screw shaft. These two guide rods are connected at their ends by brackets or tie bars 4 which are attached to the ends of the rods by screws 5 and are adapted for mounting the unit on a support, for example upon the inside walls of a casing or cabinet A as by screws 50. which pass through the walls of the cabinet into the brackets.

A fluid actuated device, for example, an impeller or water wheel or motor is -'mounted on the screw rod 3. ,As shown, this fluid actuated device comprises'a sleeve or nut 6 having a screw threaded connection with the screw rod 3 and having mounted thereon a plurality of radial blades 1 which form a water wheel so that upon rotation of the nut 8 and water wheel, the nut coacts with the screw rod 3 to cause movement of the nut and the water wheel longitudinally of the screw rod. 1

An approximately U-shaped frame or carriage 3 is slidably mounted on both of the'guide rods 2 and 3 and embraces the'nut'ii and water wheel between its arms, sothat upon movement of the nut and water wheel longitudinally of the screw rod, the carriage 8 is moved by and with them. This carriage serves as a support for a fluid supply pipe or nozzle H which has two outlets l2, one at each side of the periphery of the water wheel or impeller 1 so as to supply jets or streams of water'to the Water wheel.

Cooperating with the nozzle II is a selector ID for directing fluid alternately from; said outlets l2 upon the impeller I. This selector comprises an approximately U-shaped piece of sheet metal having the extremities of its arms pivotally connected at I3 to the arms of the carriage B so as to oscillate in a plane transverse of the carriage and parallel to the common plane of the outlets l2. The selector has an inclined flange M on each armat opposite sides of the selector tocooperate with abutments 15 one of which is mounted on each bracket 4, so as to oscillate the selector.- 7 As the carriage Smovesin one direction to the end of the-screwrod 3, one inclined .flange it will engage one abutment 5 to swing the selector Hi from one position to the other,

The selector has a guide tube It to cooperate with each outlet I2 of the nozzle 'sothat. when said guide tube is disposed in aline'mentwith or directlyvbeneath the corresponding outlet,'the fluid jet from the outlet will 'be' directed upon the impeller l so as to actuatethe same, ,As'the selector. is oscillated to bring one guide tube It into alinement with one outlet !2, the other outlet is closed by a valve lip II. on the selector. Gravitational action on the selector tends to hold it in one or the other of its two positions, andQwith the force of the fluid'stream against the walls of the guide tubes it, will hold theselector in one position until it is, moved into another position by engagement of the inclined "Where the unit is used for washing dishes,

it is desirable to place it in a cabinet or casing A at the top thereof so that the dishes may be arranged in a suitable rack B at the bottom of the cabinet and water issuing from the outlets 52 will be distributed over the dishes as the carriage and nozzle moves back and forth along the guide rods 2 and 3 by the impeller 1. In such case, it is desirable that water be supplied to the nozzle [I through a'pipe i8 which extends longitudinally of the cabinet and may be connected to a faucet or other water supply by a hose I9. Intermediate the ends the pipe I8 has connected thereto a T-fitting 23 to which is connected a branch nipple 25 to which in turn 'is' connected one end of a flexible hose 2i which is connected to the nozzle II. The T-fitting 23 has. secured thereto a cap 24 for a soap receptacle 22 which is separably connected to" the cap 24 by screw threads. The cap 24 preferably has .two openings 26 and 21 communicating with the T fitting one opening being larger than the other. In operation, soap or soap powder is placed in the soap container 22 which is connected to the cap'z l, and upon flow of water through the supply pipe E8, the water passes through the openings 25 and 21 into the soap container, causes a turbulent agitation of the soap so as to mix the water and soap thoroughly,

and then passes outwardly through the openings to the nozzle H. Agitation of the water and soap in the container is caused by the openings of diiierent sizes, the inlet being larger than the outlet so that a slight difference in pressure of the water at the two openings is created. As shown, these openin s 25 and 2! are arranged in a common plane parallel with the direction of flow of the water through the nipple 25 into the T-fitting with the outlet nearer the nipple 25. Obviously, if desired, an amount of soap just suificient towash the dishes may be placed in the soap container so that after the'soap has been exhausted a continuation of the flow of water will result in clean rinsing water being sprayed over the dishes, or, if substantial soap is placed in the container, the rinsing may be done by means of the hose l9.

For the purpose of breaking upthe water jets into a spray and more widely distributing the supply over the dishes, the ends of the blades of the water wheel or impeller may have transverse annular flanges 28 upon impact with which the water will be diffused, and which due to the rotation of the blades will widely throw the spray laterally from the impeller.

Preferably the screw rod 3 is in the form of a round metal rod having a coarse screw-thread or helical groove and the sleeve 6 has a smooth interior and two pairs. of diametrically opposite openings 29 in which are arranged balls 30 to ride in the grooves of the thread and cause coaction of the sleeve with the thread to produce longitudinal movement of "the sleeve upon rotation thereof. The balls 3% are held in the openaiddsia ings29 by collars 3| which may be screw-"threaded on the sleeve. This construction ensures"a smooth and easy rotation andj noiseless longi being that in'theunit shown in Figures. lZto l4 the'outlets 12%) of the nozzle 5 l0 are arranged so e as to direct the jets offfluid therefrom outside or clear of the impeller, and the selector I00 has the guide tubes I69 arranged so that in onejpo- 'sition each guide tube registers with one of the outlets {20 to directwater onthe impeller; and in the other position the guide tube is 'outof ali'nement with thefoutlet. The selector is oscillated to move the tubes from one position to theiother by the flanges I4 and abutments as hereinbefore described, and in operation of the unit, while the fluid is turned on,jets issue from both of the outlets 126, but the jet from one out let is directed by the corresponding, guide tube 160' so as to impinge upon the impeller, while If desired, deflectors i2! may be mountedon the carriage B beneath the outlets I so as to break up thestreams or jets of water from the outlets into drops or a spray and scatter the water over the articles being washed.

Figures '7 to 11 inclusive show the form of the fluid spraying and distributing unit described and claimed in my above-mentioned copending' application. .In this form of the invention, the fluid spraying and distributing unit includes the iwhich is. a stationary screw rod or shaft. A

two parallel guide. rods 2 and 3 the latter of traveling sleeve or nut Ea is mounted on and has a screw-threaded, connection with said screw rod 3 to coact therewith so that upon rotation of the sleeve nut it will travel longitudinally of the rod.

A fluid actuated impeller or water wheel 1a oriphery of said impeller consisting of a ring of close-mesh fabric, such as wire gauze, which is transversely corrugated to have a wave-like its arms, thesleeve nut Ba andwater wheel 'ia,

so thatupon movement of said nut and impeller longitudinally of the'screw rod, the carriage is moved by and with the nut.

'The impeller and nut are rotated by fluid streams or jets from the two outlets 2 9 of a nozzle Ila which is oscillatably mounted intermediate its ends on a nipple lib projecting up- ..wardly from the base portionof the carriage 8a..

The nozzle Ho is hollow and the nipple ilb has diametrically opposite openings Ho communicating with the nozzle. The nipple has connected thereto an elbow 2B which isin turn connected .to a flexible hose 2! which can be connected to a fluid supply, for example, a faucet a, of a dwelling house water supply system.

in one direction. nozzle are thereby moved longitudinally of the the free end of the lever lflb'whereupon the The nozzle is'arranged and oscillated on the carriage so that the outlets I21) may alternately direct fluid streams or jets on opposite sides of the periphery of the impeller to cause the impeller to rotate alternately in opposite directions and "5 thereby produce movementof the impeller and carriage longitudinally of the screw rod alternately in opposite directions. As shown, the nozzle is oscillatory in a plane transverse of the plane of rotation of the impeller, and is arranged with one outlet at each side of the impeller :so that one or the other outlet I211 is locatedabove and in line with. the impellerto directa fluid stream thereon,while the other outlet is located beyond one end of the impeller so that the fluid stream will flow clear of and will not impinge upon the impeller, and upon oscillation of the nozzle alternately in opposite directions, first one and then the other outlet i227 is brought into," position to discharge fluid upon the impeller.

For oscillating the nozzle, I have shown a system of levers and aspiring which are actuated as the carriage Sa approaches the ends of the screw rod so as to swing the nozzle with a snap action from one position to the other. One lever lilo; is pivotally mounted at lllb intermediate its ends on the base portion of the carriage and has at one end a pair of divergent arms 9 to engage the respective supports or insidewalls of a cabinet v3 at the ends of the guide rods 2 and 3. Another lever !8b is pivotally connected at one end 180 to the carriage and is connected adjacent its other end by a yoke 18a. to one end of the nozzle. A compression spring 16a is interposed between the-last-mentionedend of the lever l8q and the end of the lever Hlgz opposite the arms S and for holding said spring against displacement I have shown a pin ifib'slidably mounted at one end in a block I60 which is pivotally connected at lEcZ [to the lever la, and with its other" end 40 in abutting relation to the free end of the lever I812. With this construction, the levers Illa, [3b and spring 56a normally hold the nozzle Ila in oblique relation to the carriage in the position described and against one or the other of two stops 81) on the carriage, and with one arm 9 abutting the adjacent arm of thecarriage.

In operation, when water is supplied to the nozzle, as by opening the faucet 25a. a stream or of jet of water is directed frornpne'outlet I223 upon the impeller 7a so thatthe force of the stream and. the weight of the water accumulated in the openings ofthe wiregauzero'tates the impeller The impeller, carriage andaig guide rods until onearm 9 strikes the support or side of the cabinet. Thereupon, the lever [Ga is swung until a dead center relation is reached between the end of the lever, the pivot "Illb and spring with a snap action or jerk completes the swinging of the levers and moves the nozzle so as to bring the other outlet |2b into position to discharge a stream of water on the impeller, m.'ove-" ment of the nozzle and levers being limited by the stops 8b and engagement of the arm 9 with the carriage, and the spring and leverspositively holding the nozzle in the proper position. The impeller is then rotated in he opposite directionjm and the carriage moves toward the other end of the guide rods until the other arm 9 engages the support or cabinet, whereupon the direction of movement of the 'impellernnd carriage is again reversed in the same way. This actioncontinues until the water is shut off at faucet 25a, so that the nozzle is moved back and forth along the guide rods and the water therefrom is sprayed and distributed over the articles, for example, dishes, being washed or sprinkled.

Where the fluid spraying and distributing unit is to be used in a dish washer, it is desirable that the unit be mounted in a casing or cabinet which shall prevent splashing of the water about-the room, and which shall be convenient for the placing and removal of dishes into and from the cabinet. A desirable form of cabinet is shown in Figures 1 and 2 of the drawings, said cabinet including a body portion having a bottom 35, end walls 36, rear walls 3'! and a front wall 38. This front wall is shorter than the rear and end walls, in other words, terminates short of the top edges of said rear and end Walls. At the top of the rear wall 31 is hingedly connected at 39, a cover or top section 40 to the ends of which are connected the brackets 4 of the fluid distributing means so that the unit will move with the cover into an out of the way position as the cabinet is opened to insert or remove dishes. For bridging the gap between the front end 4| of the cover and the front wall 38 I provide an intermediate front wall section 42 which has end wings 43 pivotally mounted intermediate the ends at 44 on the inside of the end walls 35. The free ends of said wings 44 are pivotally connected to a link 45 which is also pivotally connected at 46 to the cover section MB, for example, to the water supply pipe l8, as shown. VVith this construction, as the cover section 4% is raised or opened, the intermediate front Wall section 42 is lowered into the body section to a position behind the front wall 38, while when the cover is closed the front wall section 42 is elevated to close the space between the front wall 38 and the cover. Easy and convenient access to the dish rack B is thus afforded and the dangeriiof dropping the dishes as well as discomfort which would be incident to reaching downwardly into the casing from a position in line with the top edge of the end and rear walls, is eliminated.

Preferably the cabinet is of such size that it can be set into or in convenient relation to a sink, and drain openings 41 are provided in the bottom of the cabinet so that the water can be easily and quickly drained therefrom.

While I have shown and described several forms of my invention, it should be understood that this is primarily for illustrating the principles thereof and that many modifications and changes may be made in the details of construction of the invention without departing from the spirit or scope of the invention.

Having thus described my invention, what I claimis:

1. A device of the character described comprising a stationary screw, a fluid actuated impeller mounted to rotate coaxially thereon and to coact therewith so as to move longitudinally of said screw upon rotation of the impeller, and a fluid spraying nozzle movable by and with said impeller longitudinally of said screw for directing a fluid jet onto said impeller to rotate the latter.

2. A device of the character described comprising a stationary screw rod, a fluid actuated impeller mounted thereon and coacting therewith to travel thereon, a carriage movable by and with said impeller, and a fluid discharge nozzle movable by and with said carriage for directing fluid to said impeller for actuating the latter.

3. A device of the character described comprising a stationary screw, a fluid actuated impeller mounted to rotate coaxially thereon and to coact therewith so as to move longitudinally of said screw upon rotation of the impeller, and means for automatically directing fluid jets alternately to opposite sides of the periphery of said impeller to cause said impeller to move alternately in opposite directions.

4. A device of the character described comprising .a stationary screw, a fluid actuated impeller mounted to rotate coaxially thereon and to coact therewith so as to move longitudinally of said screw upon rotation of the impeller, and a fluid spraying nozzle movable by and with said impeller longitudinally of said screw for directing a fluid jet onto said impeller to rotate the latter, and means including said spraying nozzle for automatically directing fluid jets alternately to opposite sides of the periphery of said impeller to cause said impeller to move alternately in opposite directions.

5. A fluid sprinkler comprising, a stationary screw, a traveling nut on said screw, fluid actuated means for rotating said traveling nut and being connected to and movable with the latter along said screw, and a fluid supply pipe movable by and with said traveling nut for directing fluid to said fluid actuated means for actuating the latter, and means including said fluid supply pipe for automatically periodically reversing said fluid actuated means to cause said nut to travel on said screw rod alternately in opposite directions.

6. A dish washer comprising a screw shaft and a traveling nut thereon, power actuated means connected to and movable with said nut for relatively rotating said screw shaft and said nut to cause movement of said nut longitudinally of said screw shaft, and a fluid spraying nozzle movable by and with said nut.

7. In a dish washer, a pair of parallel guide rods one of which is screw threaded, a rotary fluid actuated device mounted coaxially on and coacting with said screw threaded rod to move longitudinally thereof, and a carriage slidably connected to said guide rods and operatively connected to said fluid actuated device for movement thereby and therewith longitudinally of said guide rods, and a liquid supply conduit carried by said carriage and including a sprinkling nozzle, and means for controlling flow of liquid from said conduit to said fluid actuated device for operating the latter.

8. In a dish washer, a pair of parallel guide rods one of which is screw threaded, a rotary fluid actuated device mounted coaxially on and coacting with said screw threaded rod to move longitudinally thereof, and a carriage slidably connected to said guide rods and operatively connected to said fluid actuated device for movement thereby and therewith longitudinally of said guide rods, a fluid discharge nozzle carried by said carriage and automatic means for causing" with longitudinally of said guide rods, and "a liquid spraying nozzle mounted on said carriage for directing liquid jets upon said water wheel.

10. In a dishwasher, a pair of parallel guide rods one of which is screw threaded, a rotary fluid actuated device mounted coaxially on and coacting with said screw threaded rod to move longitudinally thereof, and a carriage slidably connected to said guide rods and operatively connected to said fluid actuated device for movement thereby and therewith longitudinally of and guide rods, and a fluid spraying nozzle mounted on said carriage for directing fluid jets upon said fluid actuated device, said nozzle being oscillatory and having two outlets to direct fluid jets alternately on opposite sides of the periphery of said fluid actuated device upon oscillation of said nozzle, and means for oscillating said nozzle. 11. In a dish Washer, a pair of parallel guide rods one of which is screw threaded, a rotary fluid actuated device mounted coaxially on and coacting with said screw threaded rod to move longitudinally thereof, and a carriage slidably connected to said guide rods and operatively connected to said fluid actuated device for movement thereby and therewith longitudinally of said guide rods, and means for automatically directing fluid jets alternately to opposite sides of the periphery of said fluid actuated device to cause thelatter to move alternately in opposite directions longitudinally of said screw threaded rod.

12. A device of the character described comprising a stationary screw rod, a rotary fluid actuated impeller mounted coaxially on and coacting with said screw rod to move longitudinally thereof, a carriage movable by and with said impeller, a fluid spraying nozzle mounted on said carriage and having two outlets one at each side of the periphery of said impeller for supplying fluid thereto, and means cooperating with said nozzle so as to direct fluid alternately from said outlets upon said impeller.

13. A device of the character described comprising a stationary screw rod, a rotary fluid actuated impeller mounted coaxially on and coacting with said screw rod to move longitudinally thereof, a carriage movable by and with said impeller, a fluid spraying nozzle mounted on said carriage and having two outlets one at each side of the periphery of said impeller for supplying fluid thereto, and means for simultaneously opening one and closing the other outlet in alternation to cause said impeller to move alternately in opposite directions.

14. A device of the character described comprising a stationary screw, a fluid actuated impeller coacting with said screw to travel thereon, a carriage movable by and with said impeller, a fluid spraying nozzle on said carriage having outlets at each side of the periphery of said impeller to direct jets of fluid clear of said impeller, movable guide tubes on said carriage for said outlets each of which in one position is in line with the respective outlet to direct a fluid stream therefrom upon the periphery of said impeller and in another position is out of line with said outlet, and means for simultaneously moving said guide tubes from one position to the other alternately with one tube in one position and the other tube in the other position for reversing the direction of travel of the impeller on the screw.

15. A device of the character described comprising a stationary screw, a fluid actuated impeller mounted to rotate coaxially thereon and to coact therewith so as to move longitudinally of said screw upon rotation of the impeller, a carriage movable by and with said impeller, a fluid supply conduit including a sprinkling nozzle on said carriage, and automatic means for controlling the flow of fluid from said fluid supply conduit to said fluid actuated impeller to cause rotation of said impeller'alternately in opposite directions.

16. A device of the character described comprising a stationary screw, a fluid actuated impeller mounted to rotate coaXially thereon and to coact therewith so as to move longitudinally of said screw upon rotation of the impeller, said impeller having radial blades, a carriage movable by and with said impeller longitudinally of said screw, and a fluid spraying nozzle carried by said carriage, said nozzle being oscillatory in a plane transverse of the plane of rotation of the impeller and having two outlets one at each side of said impeller to direct fluid jets on the blades of the impeller alternately on opposite sides of said impeller upon oscillation of said nozzle, and means for oscillating said nozzle.

17. A mechanism comprising a stationary screw, a fluid actuated device mounted with a movable carriage and coacting with said screw to travel on said screw alternately in opposite directions according to the direction of operation of said fluid actuated device, a fluid supply conduit carried by said carriage and having an outlet so arranged relative to said fluid actuated device that the discharge therefrom will actuate the device in one direction and having another outlet so arranged relative to said fluid actuated device that the discharge therefrom will operate the device in the opposite direction, means so controlling the flow of fluid from said outlets that while one outlet is eifective to operate the device the other outlet is ineffective to operate the device, means coacting with said fluid flow control means to operate the same at the extremities of a predetermined path of movement of the device and carriage, and supporting means for supporting the above structure when installed.

18. A mechanism comprising a stationary screw, a fluid actuated device mounted with a movable carriage and coacting with said screw to travel on said screw alternately in opposite directions according to the direction of operation of said fluid actuated device, a fluid supply conduit carried by said carriage and having an outlet so arranged relative to said fluid actuated device that the discharge therefrom will actuate the device in one direction and having another outlet so arranged relative to said fluid actuated device that the discharge therefrom will operate the device in the opposite direction, each outlet being formed to discharge the fluid in a stream, means so controlling the flow of fluid from said outlets that while one outlet is effective to operate the device the other outlet is ineflective to operate the device but continues to discharge fluid in a stream, a deflector on said carriage for each outlet to break up and spread the stream therefrom when the stream is ineflective to operate said device, means coacting with said fluid flow control means to operate the same at the extremities of a predetermined path of movement of the device and carriage, and supporting means for supporting the above structure when installed.

19. A mechanism comprising a screw shaft, a carriage and a guide therefor, a motor actuated driving means connected to said carriage and includinga: nut coacting with said screwshaft to causer relative rotation'of said shaft and said nut and thereby produce movement of the nut and carriage longitudinally of said shaft, and a fluid spraying nozzle carriedby. said carriage.

20. A mechanism comprisinga screw shaft, a carriage and a guide therefor, a, fluid actuated driving means connected to-said carriage and including a nut coacting with said screw shaftto cause relative rotation of said shaft and said nut and therebyproduce movement of the nut and carriage longitudinally of the shaft, a fluid supply conduit movable by and with said carriage, and means for controlling flow of fluid from said conduit to said fluid actuated driving means for operating the latter.

21. A mechanism comprising a screw shaft, a carriage and a guidetherefor, a fluid actuated driving means connected to said carriage and including a; nut coactingwith said screw shaft to causelrelative rotation of said shaft and said nut and thereby produce movement of the nut and; carriage longitudinally of the shaft, a fluid supply conduit carried byisaid carriage and having an outlet-s0.- arranged relative to said fluid actuated drivingmeans that thedischarge therefrom; will actuate the said driving means in one direction and having; another outlet so arranged relative to said fluid actuated driving, means that the discharge therefrom willvoperate the driving-means in the opposite direction, means socontrolling the-flow of fluid from said outlets that while one outlet is effective. to operate the drivingmeans the other outlet is ineffective to operate the driving means, and means for operating said fluid flow control means at predetermined points in the path of movement of the carriage and driving means.

22. A mechanism comprising a stationary screw shaft, a. carriage and a guide therefor, driving meansconnected to said carriage and including a nut coacting with said screw and power operated means for rotating said nut ,to-.cause.move-, ment of the nut and carriage longitudinally of g said screwshaft, and a fluid spraying nozzlecar ried by said carriage,

23. A mechanism comprising a screw shaft, a

carriage and a guide therefor, a driving means including a rotatable fluid actuated device and a nut coacting with said screw shaft to cause rela,

tive rotation of said shaft and said nut and thereby produce movement of the nut and carriage longitudinally of the shaft, a fluid supply. conduit movable by and with saidcarriage, means for controlling flow of fluid from said conduit upon the periphery of said fluid actuated device longitudinally of the, screw upon operation of said device, afluid supply conduit carried by said carriage and having a fluid spraying outlet, and

supporting meansfor supporting the above structure wheninstalled.

OTI-IMAR MAYCEN.

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