US2877053A

US2877053A - Sprinkling devices

Info

Publication number: US2877053A
Application number: US483472A
Authority: US
Inventors: Kenneth F Kennard
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-01-24
Filing date: 1955-01-24
Publication date: 1959-03-10
Anticipated expiration: 1976-03-10

Description

March 10, 1959 I K.F. KENNARD v ,053

SPRINKLING DEVICES Filed Jan. 24, 1955 2 Sheets-Sheet 1 Fiel March 10, 1959 K. F, KENNARD 2,877,053

SPRINKLING DEVICES Filed ,Jan. 24, 1955 2 Sheets-Sheet 2 FlGA 1 4 4 4 0 37 Si O United States Patent SPRINKLING DEVICES Kenneth F. Kennard, St. Petersburg, Fla.

Application January 24, 1955, Serial No. 483,472

7 Claims. (Cl. 299-71) The present invention relates to liquid distributing or sprinkling devices. More particularly, the invention relates to improvements in water sprinklers of rotary and/ or part-circle types, useful for horticultural or other purposes.

In the construction, and particularly in the use and servicing of sprinklers, it has been realized that certain mechanical features, as generally applied, are objectionable and often occasion faulty operation and excessive maintenance, as well as high manufacturing costs. It is known, for instance, that coiled springs which corrode and lose their calibration, are a main cause of ultimate complete discontinuance of operation. Furthermore, unnecessary bearing surfaces or an excessive number thereof which corrode to the point of seizing the sprinkler, thus rendering it inoperative, compel too frequent servicing and replacements. Avoidance of diflicultly assembled parts and omission of superfluous parts, moving as well as stationary, result in simpler, more certain and more continuous operation, as well as in the lowering of manufacturing costs.

In the present invention, objectionable features, including, among others, those indicated hereinabove, are eliminated, and the usual disadvantages and inconveniences are avoided or minimized. Elements are combined in a highly practical manner from the standpoints of ease of assembly, and of efficiency, dependability, and economy of operation.

The improved sprinkler, hereinafter described, is of i the rotary head type attachable to a water supply system, and operative by the force of a projecting water stream to rotate the head incrementally, if desired, or

in what is known as step-by-step movement. Improved means and improved arrangements of means are provided for use in sprinklers whereby they are advantageously maintained in easy working order in any of various modes of operation including unidirectional rotation of the sprinkling head, part-circle oscillation thereof through any desired are, or spraying with a non-intercepted stream, or combinations of these modes. In a preferred arrangement, each of these modes of operation is selectively effected, and convenient conversion from one manner of operation to another, without the need for tools, is also made possible. Improved means are provided for properly positioning and for conveniently mounting elements for a desired automatism and control. Lever means, for instance, can be effectively used with a desired leverage and action in connection with reversing means and in cooperation with limiting elements and deflector means for oscillation in part-circle operation. A means for obtaining smooth functioning in such oscillation includes force supplying means arranged in a preferred manner for positive and easy shifting of the operation from clockwise rotation to counterclockwise rotation of the spray head and vice versa. For this purpose, a preferred deflector, having a so-called duplex'head adapted to be positioned in the path of the stream from the spray head in a preferred manner.

2,877,053 Patented Mar. 10, 1 959 ice of the appended claims without departing from the spirit of the invention.

Referring to the drawing, Fig. 1 is a side elevation of a sprinkling device embodying features of the present invention including a deflector means in position for effecting rotation of the spray head; Fig. 2 is a top view of the device; Fig. 3 is a view taken on line 3-3- of Fig. 1 in the direction of the arrows, showing means that serve in the automatic control of the direction of rotation of the spray head; Fig. 4 is a side elevation, partly in section, of the device, and showing the deflector means in a non-deflecting position; Fig. 5 is a plan view of an element that serves in the mounting of parts and cooperates in the reversing operation of the device; Figs. 6, 7, and 8 are views showing the construction of a plate means for installation in the device as illustrated in Fig. 3, Fig. 6 showing a plan view of a blank as stamped out prior to forming it for installation, and Figs. 7 and 8 showing respectively a plan view and a side elevation of the plate as shaped for installation; Fig. 9 is a perspective view showing a form of an impulse element with deflector means, apart from the device; and Fig. 10 is a fragment showing a plan view of the underside of the deflector head of the means shown in Fig. 9.

Similar reference numerals applied in connection with the various figures of the drawing indicate corresponding parts of the device. I

The device shown comprises a sprinkling member, such as a nozzle 1 extending branchwise from a head 2. The head 2 is provided with a base member 3 which serves as a bearing support and as a connector means or an.

adapter for attachment to a water supply pipe. The head 2, as ordinarily mounted, is rotatable about a vertical axis, and the base member 3 remains stationary while water is conducted through 'the head 2 to the nozzle 1.

An impulse element 4, including a deflector means, is mounted for'e'ffecting a step-by-step movement in the rotation of the sprinkling head 2 and the nozzle 1 for radially projecting a stream of water. Improved means including a lever element such'as a plate 6 and associated elements for mounting and supporting a deflector and for controlling the operation thereof, to be individually described further in detail, are shown assembled An improved arrangement of means provided for easily shifting from one mode of operation to another, and a preferred means for provid ing a shifting force, also to be described in detail, are additional features of the invention.

The impulse element 4 is a solid, composite form shown in Figs. 1, 2, 4 and 9. It comprises a substantially rectangular frame, at one end of which is a deflector head 8 and at the other end of which is a counterweight 9, both the deflector head and the counterweight being integral with and connected by

side bars

10 and 11. The side bars have intermediate the ends of the frame, respectively, integral bearings 12'and 13, for a shaft 14, positioned between the deflector head 8 and the counterweight 9. The shaft 14 is horizontally disposed to permit rocking of the frame and movement upwardly and downwardly of the deflector head 8 for impingement of the stream from the nozzle 1 selectively on deflector surfaces, preferably arranged as shown, and operable in amannertobedescribed. I j z i 4 ..(Fig.'9) from a single piece of-a'ny desired, suitable --material, such as preferably a non-corrodible, light'metal,

or alloy, or other solid material, including a plastic, not affected chemically or physically by the stream of liquid from the nozzle 1. The deflector head 8 has several deflecting surfaces rigidly supported by the

bars

10 and 11,

and advantageously positioned, with no separately movable parts that are likely to become stuck fast and thus prevent the desirable functioning of the sprinkler. I

As illustrated, particularly by means of Figs. 1, 2, 4, 9, and 10, the deflector head 8 has a central vane or wall portion 16 which has an edge 17 adjacent the sprinkler head 2 and which is substantially vertically disposed when the axis of rotation of the head 2 is vertical, and is in the same plane with the axis. The side surfaces 18 and .19of the vane or wall 16 are continuous with upwardly facing

surfaces

20 and 21, respectively. The latter surfaces curve outwardly in substantially opposite directions away from the vane 16 and away from the edge 17. .Each

surface

20 and 21 also curves upwardly from an

edge

22 and 23, respectively, positioned slightly below the path of the stream from the nozzle 1 when the deflector head 8 assumes the position shown in Fig. 1. As

will be further set forth in detail in the description of the operation of the device, when the stream is effecting a turning movement of the sprinkler head 2 the above deflector head surfaces tend to cause a sidewise and an upward and forward sweep of liquid from the nozzle 1. From this a general impression of the contour of the de ,flector surfaces may be obtained.

A bafile 24, extends laterally across the frame of the impulse element 4 from bar 19 to bar 11 intermediate the nozzle 1 and the

surfaces

20 and 21 of the duplex deflector head 8. The forward edge 25 of the bafile 24 is joined to the vane 16 adjacent the upper end of its edge 17. The underside of the baffle 24 is above the plane of the stream normally projected-from the nozzle 1, when, as positioned in Fig. 1, the deflector is effecting a turning movement while the stream passes through

openings

26 and 27 formed between the edge 25 and the

edges

22 and 23, respectively.

If desired, the top side and the underside of the baflle 24 may converge in the direction toward its rear edge 28, or toward the nozzle 1. The

sides

18 and 19 of the vane 16 may also converge in that direction. Further, if desired, the sides referred to in each instance, may converge to a line at the

edges

27 and 17, respectively.

The impulse element 4 is mounted for oscillation about two axes at right angles to each other. With the axis of rotation of the sprinkling head 2 in vertical position, the shaft 14 serves as the horizontal axis, and a spindle 30 serves as the vertical axis. A preferred means, hereinbefore referred to, for providing for easy assembly and operation of parts functioning in the sprinkling device, is the lever element or plate 6. This is rigidly attached to or fulcrummed on one end of the spindle 30 maintained in position and rotatably supported on the sprinkling head, with its axis of rotation paralleling the axis of rotation of the sprinkling head 2, by means of spaced

lugs

31 and 32 extending from the said head and serving as bearings for the spindle. Between these lugs, the spindle 30 passes through a sleeve 33 from which extends an arm 34 integral with the sleeve and substantially perpendicular to the spindle. Adjacent the sleeve 33, the arm 34 is provided with a boss 35 and a boss 36 on either side thereof which serve to form a horizontal bearing preferably in close proximity to the sleeve 33 and in line with the

bearings

12 and 13, through which the shaft 14 passes, serving as indicated above, as the aforesaid horizontal axis for the impulse element 4. The arm 34- is in effect hingedat one end to the sprinkling head with its other end swingable from side to side in a substantially horizontal plane or in a plane substantially perpendicular to the axisaof rotation of the sprinkling head. With the impulse element 4, the arm 34 serves as a supporting means for the deflector head and for positioning it in relation to the stream from the nozzle 1.

Various arrangements are possible for use in effecting oscillation of the impulse element 4 on the vertical axis, or spindle 30, and in shifting the deflector surfaces particularly for part-circle, oscillating operation. One advantageous arrangement of the preferred means for such purposes, comprises, as illustrated, a permanent bar magnet 37 attached to the sprinkler head 2 and extending into a space between two magnetically attractable surfaces, which, under the influence of the magnetic field, serve in providing a force in the shifting operation.

The magnet 37 in the form of a flat plate is fastened to the sprinkler head 2 by means of a screw 38 in a vertical slot 39 in the lug 31. The magnet projects from the sprinkler head in a direction opposite that of the nozzle, and so that an outer pole end thereof is positioned in the space between

bars

40 and 41 which provide the aforesaid magnetically attractable surfaces. These bars are fastened in upright position to opposite sides of the arm 34 by means of a screw 42, at a point between the shaft 14 and the counterweight 9, above one end of the plate 6. All parts of the sprinkling device except the magnet 37 and the

bars

40 and 41 are preferably of non-magnetic as well as non-corroding metal.

The relative positions of the parts of the device are such that the jet opening of the nozzle 1, the spindle 30, and the magnet 37 are in substantially the same vertical plane, and that-when the free end of magnet 37 is substantially midway between the

bars

40 and 41, the opening of the nozzle 1 is in alignment with the edge 17 of the vane 16. The space between the

bars

40 and 41 is such that when the magnet 37 contacts the bar 40, the nozzle 1 is in proper alignment with respect to

surfaces

18 and 20 on one side of the deflector head 8 so that the force of the impinging stream causes movement of the sprinkler head 2 in one direction; and when the magnet37 contacts the bar 41, the nozzle 1 is in proper alignment with respect to

surfaces

19 and 21 on the other side of the deflector head so that the movement is effected in the opposite direction.

The lever element 6, advantageously in the form of a plate, shown as part of the device in Figs. 1 to 4, is formed from a blank 44 (Fig. 6) provided by stamping a relatively thin but non-flexible, rigid sheet of brass or other suitable metal. Portions 45 and 46 of the blank 44 are bentalong a line parallel to the

edges

47 and 48 of a cut 49, extending from one end of the blank, to form

flanges

50 and 51 respectively, as illustrated in Figs. 7 and 8, thereby providing a slot extending inwardly from the said end. A rectangular portion 52 at the opposite end of the blank is bent in the same direction with respect to the blank surface as the flanges 5d and 51, and the end portions of the rectangular portion 52 are bent to form a channel with

sides

53 and 54 extending outward in the direction away from the plate.

As shown in Fig. 3, leaf springs or pressureplates 55 and 56 are attached to the

flanges

50 and 51, respectively, at their inner ends by suitable fastening means such as 'bolt-and-nut fasteners 57 and 58, respectively, or by riveting or welding. The free end of each pressure plate extends outwardlyto the adjacent end of the plate 6 and is adapted to engage a projection 59 depending from the arm 34 to'cooperate therewith in the oscillation of the impulse element 4 for part-circle operation as further described below. At the opposite end of the plate 6, a reverse control stem 61 is supported and hinged at 61 between the channel sides 53 and 54. The stem 60 is adapted to be brought into engagement alternately

withstop fingers

62 and 63 when the device is operating to provide for part-circle rotation and to efiect cscillation'of'the sprinkler head in a predetermined arc. The stop fingers project outwardly from the base 3 and are peripherally and independently adjustable thereon. The stem 60 may be moved on its hinge into the position shown in dotted outline in Fig. 1 to avoid contact with the stop fingers and to provide for full-circle operation, when desired.

In the process of stamping a plate 6 for installation in the sprinkler, a perforation 64 and an enlarged opening 65 are provided. The perforation 64 is provided intermediate the ends of the plate for attachment of the spindle 30 thereto which serves as a fulcrum, and the opening 65 is provided for proper clearance around the upper part of base 3 of the sprinkler head 2 to permit functioning of the plate 6 in the manner to be described.

For adjustment purposes in the operation of the sprinkler, and more particularly the impulse element 4, a set screw 68 is provided at the top of the counterweight 9. The set screw protrudes into the upper end of an elongated slot 69 in the counterweight, and is adapted to be brought into abutment with the free end 70 of the arm 34 which extends into the slot, thereby serving in determining in certain aspects of the operation the relative position of the deflector head and the jet opening of the nozzle 1. For example, by adjusting the screw 68, the deflector head can be lowered to render it inoperative, or, when in operation, the distance that the deflector oscillates and hence the number of times per turn that it oscillates, which in effect ultimately determines the size of each increment of a turn, can be controlled.

In assembling the parts to provide a complete sprinkler unit, the reversing stem 59 and the pressure plates 55 and 56 are mounted on the plate 6; the spindle 30 is inserted in the opening 64 and one end thereof, if desired, may be pre-attached to the plate 6 to hold the spindle perpendicularly; the magnet 37 is attached to the sprinkler head 2 by means of the screw 38; the bars or plates 40 and 41, of magnetically attractable metal, are attached to the arm 34 by means of the screw 42; the feed pipe 66 of the sprinkler head 2 is inserted through the opening 65 in the plate 6 with the spindle 30 in alignment with the hearings in the lugs 31 and 32; then while the arm 34 is held in place with the magnet 37 positioned between the bars 40 and 41 and with the sleeve 33 in the space between the lugs 31 and 32 and in alignment with the bearings therein, the plate 6 is drawn up to pass the spindle 30 through the said bearings and through the sleeve 33, whereupon a retaining ring 72, or its equivalent, is inserted at the upper end of the spindle 30 to maintain it and the plate 6 in place; the base 3, upon which the adjustable limit stops 62 and 63 are placed, is installed on the end of the feed pipe 66; and finally, the impulse element 4, carrying the set screw 68, is mounted by inserting the end 70 of the arm 34 into the slot 69 in the counterweight 9 and by bringing the bearings 12 and 13 into alignment with the bearings 35 and 36, respectively, and inserting the shaft 14 through these bearings, the ends of the shaft being provided with retaining rings or the equivalent to maintain it in position at the horizontal axis of the impulse element 4.

In the operation of the sprinkler shown, for watering a lawn, for instance, with the base 3 screwed into a surface water supply pipe of a conventional type, the controls may be set to provide distribution of water on the lawn in one of several ways, namely; (1) repeated application to an area in a given sector, (2) repeated application to an area completely around the sprinkler, and (3) application to an area in one direction from the sprinkler.

In the first above manner of distributing the water, the

stop fingers

62 and 63 are set and the stem 60 is directed downward to engage the finger 62 when the sprinkler head 2 is turned in one direction and to engage the finger 63 when the head is turned in the opposite direction. The circumferential distance that the fingers are apart will determine the are through which the head '6 willoscillate or in other words the desired sector over which water is to be projected. The screw 68 is then set for the purpose indicated above and explained further below. Water is admitted through the sprinkler head 2 at a pressure sufiicient to project a stream from the nozzle 1 onto the deflector surfaces on one or the other side of the vane 16 in the deflector head 8. As the stream strikes, the force of the impact causes the sprinkler head to turn on its axis while the stream is deflected and the water is deposited on a nearby area of the lawn. At the same time, the force of the stream tends to depress the deflector head 8 and to rotate the impulse element 4 on its horizontal axis or shaft 14, and after a slight turning of the sprinkler head the deflector is eventually depressed so that it is lowered and thereby becomes momentarily ineffective, whereupon the stream projects radially above the baflle 24 and beyond the deflector head 8 to spray a distant area. As the deflector head reaches the lower most level in its downward swing, the counterweight 9 forces the deflector head upwardly to its uppermost position, that is, the deflector head rises, the baffle 24 enters and passes through the stream and breaks it up momen- ,tarily, permitting the deflector head to come into position for effecting another slight turn of the sprinkler head. Oscillation of the impulse element on the shaft 14 proceeds in this manner to effect a step-by-step watering of a lawn surface during rotation of the sprinkler head 2.

As indicated above, the number of times the deflector head oscillates during rotation of the springler head and hence the amplitude or size of each increment of the arc through which the sprinkler head turns on its axis for each oscillation of the deflector head, can be selectively adjusted and controlled by means of the screw 68. By screwing this screw into the slot 69 in the counterweight, the increments are shortened, and by raising the end of the screw in the slot the increments are lengthened.

When the stem contacts and presses against a stop finger with sufiicient pressure resulting from the continuing pressure of the stream on the deflector head, the plate 6 acts as a lever with the end of the spindle 30 as its fulcrum. At this moment, if the position of the deflector head is such that the magnet 37 is in contact with, for instance, the bar 40, the pressure plate 56 is forced against the projection 59 and urges the bar 40 away from the magnet 37. The pressure plate 56 is compressed to a degree where the force exerted thereby exceeds the force of the magnetic attraction between the magnet and the bar 40, and these are separated with a quick snap action as the opposite bar 41 is attracted by the magnet 37 whereupon the magnet and bar 41 are brought into contact. The resulting movement of the end of the arm 34 causes the impulse element 4 to turn on its vertical axis, or the spindle 30, shifting the deflector head so that the force of the stream is transferred alternately from the deflecting surface on one side of the deflector head to the deflecting surface on the other side. Since the curvature of the surface on one side of the wall 16 is opposed to that of the surface on the other side, the shifting of the force of the stream by the magnetic action described, results in a reversal of the direction of rotation of the sprinkler head, and the latter continues to oscillate on its vertical axis through the pre-determined are.

In the second above manner of distributing water on a lawn, the stem 60 is turned up on its hinge 61 so that with repeated turns of the sprinkler head in clockwise or counterclockwise direction the stem does not contact a stop finger. The sprinkler is then brought into fullcircle, step-by-step operation in either direction, the direction depending on the side of the deflector head 8 on which the stream from the nozzle 1 impinges. This operation of the sprinkler is the same as that in the above-described first manner of distributing water except that there is no oscillation of the sprinkler head 2 on its vertical axis.

. In the above-mentioned third manner of operation,

the deflector head 8 is simply maintained in a lowered position by the screw 68 so that the stream is directed tion, or the location of the sprinkler is to be changed.

Any such change can be made by an attendant, bare handed, without Cutting off the water supply to the sprinkler, and without receiving a wetting from the spray. The attendant proceeds toward the sprinkler while the stream is directed away from him. If the sprinkler is set for part-circle operation and. the are through which it oscillates is to be changed, the attendant merely depresses the deflector head 8 with one hand so that the stream projects freely out into space. With the other hand, he pushes'the stop

fingers

62 and 63 closer together 'or further apart, depending on the size of the sector to be sprayed. If full-circle operation is desired, the stem 60 is brought up into its horizontal position, and if the rotation is to be, for instance, clockwise, the impulse element 4, while the deflector head 8 is held down out of the path of the stream, is turned on its vertical axis so that the direction of the stream is such that it will impinge on the side of the deflector head having the

surfaces

18 and 20, when the sprinkler is in operation. If the I,

tation is to be counterclockwise, the impulse element is turned so that the stream will act on the

surfaces

19 and 21. if the attendant desires to set the sprinkler for projection of the stream in one direction, he holds the deflector head 3 down and out of the path of the stream with one hand while With his other hand he turns the screw 68 sufliciently to maintain the deflector head out of said path, thereby keeping the impulse element from functioning. In changing the location of the sprinkler connected to a movable supply line, the deflector head is simply held out of the path of the stream until the sprinkler is placed in its new location and is set for the desired manner of operation.

in addition to its versatility as seen in its operation, the device of the present invention has certain features which in themselves and which in cooperation with each other, render it outstanding and unique. Among such features are means and their arrangement whereby a desirable leverage is obtained for effective automatic performance. For example, means such as the arm 34 and the parts thereon may be so mounted that not too great a force is necessary for changing the position of the deflector with a positive, easy action. The arm'34, as mounted, serves as a lever with the spindle 39 as its fulcrum, with the weight (impulse element 4 on the shaft 14) preferably close to the fulcrum, and with the force applied preferably at a point at a greater distance from the shaft 14 than that between the shaft and the spindle 30, so that the power needed to oscillate the impulse element is lessened. A lever means (plate 6) also with the spindle as its fulcrum serves in applying the power (at the stem 60) needed to overcome the magnetic force of the magnet 37. With proper spacing between the spindle 30 and the ends of the plate 6, the power needed at the stem 60 is lessened.

The oscillatory and rotatory actions of the device are positive, and the rate of movement of the sprinkler head can be maintained'very low, which results in less wear on the parts.

The invention hereinabove set forth is embodied in particular form and manner but may be variably embodied within the scope of the claims hereinafter made.

What is claimed is:

1. In a sprinkling device having a sprinkling head mounted for rotation about a vertical axis and for radially projecting'a stream, an arm extending from said sprinkling head and movable in a substantially horizontal plane, laterally spaced, magnetically attractable metal plates projecting upwardly from said arm, a. bar'magnet attached to thesprinkling head and having one end projecting into the space between the said magnetically attractable metal plates, an impulse element mounted for oscillation on an axis positioned horizontally on said arm, a deflector head on said impulse element having a. pair of opposed deflector surfaces movable into the path of said stream by movement of said arm in said horizontal plane for effecting rotation of said sprinkling head by the force of the impinging stream, a lever element fulcrnmed on said sprinkling head, adjustable stop fingers for limiting oscillation of the said sprinkling head in a predetermined arc, a stem extending from said lever element for engagement with said stop fingers for reversing the direction of rotation of said sprinkling head in eflecting oscillation in said arc, said lever element engaging said arm for movement thereof and said magnetically attractable plates to bring them alternately into contact with said magnet upon engagement of said stem alternately with said stop fingers by oscillation of the sprinkling head by impingement of said stream on said deflector surfaces of said deflector head alternately brought into alignment with said stream.

2. In a sprinkling device having a sprinkling head mounted for rotation about a vertical axis and for radially projecting a stream, an arm having one end hinged to said sprinkling head and extending from said sprinkling head substantially perpendicular to said axis, the free end of said arm being movable from side to side in a substantially horizontal plane, a pair of laterally spaced magnetically attractable metal plates projecting upwardly from the said arm. adjacent the free end thereof, a permanent bar magnet attached to the sprinkling head and having one end projecting into the space between the said magnetically attractable metal plates, an impulse element mounted for oscillation on an axis positioned horizontally on said'arm intermediate its ends, a deflector head on said impulse element having a pair of opposed deflector surfaces movable into the path of said stream by the sidewise movement. of said free end of said arm for eflecting rotation of said sprinkling head by the force of the impinging stream, a lever element beneath the said arm, the said element fulcrnmed intermediate its ends on said sprinkling head, adjustable stop fingers projecting from the base of said sprinkling head for limiting oscillation of the said sprinkling head in a predetermined arc, a stem depending from one end of said lever element for engagement with said stop fingers for reversing the direction of rotation of said sprinkling head in eflecting oscillation in said arc, means at the opposite end of said lever element for engaging said arm for movement of the free end thereof and said magnetically attractable plates from side to side to bring them alternately into contact with said magnet upon engagement of said stem alternately with said stop fingers by oscillation of the sprinkling head by impingement of said stream on said deflector surfaces of said deflector head alternately brought into alignment with said stream.

3. In a sprinkling device as set forth in claim 2, the said lever element having at its, said end which engages said arm pressure plates for effecting a snap action in the making and breaking of contact between the said magnet and said plates alternately in the side to side movement of the said free end of said arm.

4. In a sprinkling device having a rotatable sprinkling head mounted for alternate clockwise and counterclockwise rotation and a nozzle for radially projecting a stream of liquid during rotation of said head, a system of levers, one of said levers having at one end stem means for engaging stop fingers for limiting the oscillatory movement of said sprinkling head in a predetermined arc and at the other end engaging a movable, unattached end of a second lever having associated therewith means including a' duplex deflector head having surface sections for impingement thereon of said stream from said nozzle to effect rotation of said sprinkling head, one of said sections for effecting rotation in one direction and another of said sections for effecting rotation in the opposite direction, the alternate movements of said first-named end of said first-named lever by contact of said stem means with said stop fingers causing alternate alignment of said surface sections with said stream to effect said oscillatory movement of said sprinkling head, the said levers having a common fulcrum on said sprinkling head.

5. In a sprinkling device having a sprinkling head mounted for rotation about a vertical axis and for radially projecting a stream, an arm having one end hinged on said head and the other end unattached and free for sidewise movement, an impulse element mounted for oscillation on an axis positioned horizontally on said arm intermediate said ends, a deflector head on one end of said impulse element having a pair of opposed deflector surfaces for effecting selectively clockwise rotation and counterclockwise rotation of said sprinkling head by the force of said stream impinging on said deflector surfaces, a weight at the opposite end of said impulse element, a slot in said weight, the said free end of said arm projecting into said slot and permitting vertical movement of said weight, means on said weight for adjustably limiting said movement of said weight and means for moving the said arm to position the deflector head with respect to said stream from said sprinkling head.

6. In a sprinkling device having a rotatable sprinkling head mounted for alternate clockwise and counterclockwise rotation and a nozzle for radially projecting a stream of liquid during rotation of said head, the said sprinkling head having in association therewith means for effecting part-circle oscillatory rotation of said head, the said means including an arm having one end free and unattached and the opposite end hinged to said head, a deflector means supported on said arm, a lever element fulcrumed intermediate its ends on said sprinkling head for moving the arm to position said deflector means, means at one end of said element in association with stop fingers for controlling the extent of the arc in which the said head oscillates, and pressure plates affixed to the other end of said lever element for providing urging forces in changing from one direction of rotation to the other in the oscillation of the said sprinkling head.

7. In a sprinkling device as set forth in claim 6, the said lever element being formed from a single, rigid piece of sheet metal having an opening intermediate its ends for fulcrumming the element on the said sprinkling head, the said sheet metal at one end of said element being formed into a channel between the sides of which a reverse control stem is hinged for providing said means for controlling the extent of said arc through which said head oscillates, a flange along either side of a slot extending inwardly from the opposite end of said element for attachment of said pressure plates.

References Cited in the file of this patent UNITED STATES PATENTS 1,412,773 Colgate Apr. 11, 1922 2,228,720 Coles Jan. 14, 1941 2,309,782 Orr Feb. 2, 1943 2,345,030 Buckner Mar. 28, 1944 2,421,551 Dunham June 3, 1947 2,592,609 Shoemaker Apr. 15, 1952 2,606,789 Royer Aug. 12, 1952