Atomizing sprinkler head

Nov. 28, 1950

2,531,789

A. C. ROWLEY

ATOMIZING SPRINKLER HEAD

Filed April 19, 1946

Sheets-Sheet 1

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<td> Nov. 28, 1950</td><td> A. C. ROWLEY ATOMIZING SPRINKLER HEAD</td><td> 2,531,789</td>

<td> Filed April 19, 1946</td><td></td><td> 2 Sheets-Sheet 2</td>

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Patented Nov. 28, 1950

2,531,789

UNITED STATES PATENT OFFICE

2,531,789

ATOMIZING SPRINKLER HEAD

Arthur C. Rowley, Drexel Hill, Pa., assignor to Globe Automatic Sprinkler Company, Philadelphia, Pa., a corporation of Pennsylvania

Application April 19, 1

Claims. ('

This invention relates to improvements in atomizing sprinkler heads, and a principal object of the invention is to provide a novel and improved device of this character characterized by highly efficient operation and a degree of adjustability to meet the various requirements.

More specifically an object of the invention is to provide a sprinkler nozzle capable of discharging a solid conical body of finely divided atomized liquid wherein the atomization is substantially ¹uniform throughout.

The invention resides further in certain novel structural details and arrangements hereinafter described and illustrated in the attached drawings wherein: ^J

Pig. 1 is a longitudinal sectional view of a nozzle body made in accordance with the invention;

Fig. 2 is a reduced top plan view showing the pattern of the atomized liquid as projected from said nozzle; 2

Fig. 3 is a side view partly in section of a sprinkler head made in accordance with the invention;

Fig. 4 is a longitudinal sectional view of the sprinkler head; ²

Fig. 5 is an outer end view of the sprinkler head, and

Fig. 6 is a section on the line 6—6, Fig. 3.

With reference more particularly to Figs. 3 to of the drawings, a sprinkler head made in ac- 3 cordance with the invention may comprise a hollow generally cylindrical body member i threaded at one end as indicated at 2 for attachment in a sprinkler system and having an hexagonal portion 3 for reception of a wrench. Extending 3 longitudinally or axially of the body from the threaded end thereof is a cylindrical bore 4 which terminates at its inner end in a plurality (4 in the present instance) of ports 5, said ports diverging outwardly with respect to each other 4 and with respect to the axis of the bore 4, which is also the axis of the nozzle.

The body member I has a reduced generally cylindrical axially disposed end portion 6 and the ports 5 are formed in the inclined wall 7 which 4 joins this terminal end portion to the side wall of the bore 4. That portion 8 of the end portion or extension 6 of the body member which immediately adjoins the wall 7 is cylindrical in form and this cylindrical portion 8 terminates 5 in a portion 9 of increased diameter. From the outer end of the portion 9 extends a substantially cylindrical or slightly tapered portion II—11 which terminates in a radially enlarged head portion 12. The portion 9 is of somewhat I

946, Serial No. 663,533

31. 299—119) greater diameter than the head portion 12 and these two portions form confronting relatively spaced substantially radial annular shoulders 13 and 14. The shoulder 13 is provided with an ³ annular series of projecting fins 15 which are angularly disposed with respect to radial lines emanating from the axis of the nozzle and these projecting fins 15 constitute deflector means having a function hereinafter described. The head ⁰ portion 12 has in its outer end an axial reentrant recess 16, and a series of ports 17 distributed around the head portion extend convergently from the shoulder 14 to the wall of the said recess.

³ That portion of the body member which immediately adjoins the wall 7 is threaded, as indicated at 18, for reception of a sleeve member

19. This sleeve, of cup-like form as illustrated, forms a chamber which surrounds the extension ⁰ 6 of the body member and with the inner end of which the ports 5 communicate. At its outer end the sleeve 19 is provided with a circular opening 21 having a cylindrical innei^- portion 22 and an outwardly flaring outer portion 23, and in as- ³ sembly this port embraces the inner part of the head 12 as illustrated so that between the wall of the opening 21 and the surface of the head ! 2 an annular port is formed which is co-axial with the extension 5. Obviously the position of the 0 opening 2! with respect to the head 12 and to the shoulders 13 and 14 may be varied by adjusting the sleeve in the axial direction through the medium of the associated threads.

In operation, water under pressure is admitted 5 to the bore 4 from the sprinkler system and is discharged through the ports 5 into the annular discharge chamber 24 formed between the extension 6, which forms the inner wall of the chamber, and the wall of the sleeve 19. This 0 water is directed by the diverging ports 5 against the wall of the sleeve. At the outer end of the chamber the water passes through the transverse or radial channel 25 formed between the shoulder 13 and the confronting portion of the 5 end wall 26 of the sleeve, and in passing through this channel the water contacts the inclined ribs 15 on the shoulder 13 and is deflected by these ribs so as to pass to the annular discharge in a substantially tangential direction as indicated by 0 the arrows in Fig. 6. By reason of the restriction of the opening 21 and of the relatively small dimensions of the annular discharge port, a part of the liquid is caused to pass through the auxiliary discharge ports 17. That portion of ® the water which passes through the discharge

2,531,789 port proper is broken up by the action of the deflector elements 15 and the narrow confines of the discharge port and is projected outwardly as a fine spray in a conical pattern as illustrated in Figs. 1 and 2. The water which passes _sthrough the ports 17 converges in separate jets which intersect as illustrated in Fig. 1 to be broken up and atomized and to fill the central portion of the conical pattern so as to produce a substantially homogeneous cone of atomized liquid. As previously set forth, the sleeve 19 may be adjusted to modify the character and pattern of the discharge as may be required.