US1763980A - Sprinkler - Google Patents

Description

Jne 1.7, 1930. L R NELSON 1,763,980

SPRINKLER Filed Nov. 28, 1927 gwn-toa',

L .RN/'525017,

automa;

Patented June 17, 1930 UNT STT'ES LEWEN R. NELSON, F PEORIA, ILLINOIS SPRINKLER Application led November 28, 1927. Serial No. 236,117;

This invention pertains to sprinklers of that type which includes a part for attachment to an upright standard or pipe discharging water under pressure, and a spray .i member pivotally supported on said part rotated by such water pressure.

An object of the invention is to provide a sprinkler head wherein the rotating spray member can always rotate freely even though the part carrying it may become misshapen.

Another object is to furnish a sprinkler head of the type named wherein a ball and socket structure is employed as a bearing for one end of the spray member and so disposed and arranged that though the other bearing for said member may be moved out of its normal position the said spray member may still rotate freely.

Still another object is to provide a spray head wherein a rotating spray member has a ball and socket bearing at one end and a coned bearing at the other end arranged and adapted whereby a chance misshaping of the partcarrying said spray member will not affect the free rotation of the latter or destroy its effectiveness in distributing water.

In the appended drawing- Figure 1 is a front elevation of my sprinkler head.

Figure 2 is a rear elevation of a spray member.

y Figure 3 is a plan of the spray member,

and

Figure 4 is a side elevation of the sprinkler head showing the front side of the said spray member.

I am aware of the prior art in devices of this type but am also familiar with the didiculties met with when such devices become damaged in that when a slight disarrangement of the affair occurs the free rotation of the spray member is affected.

The sprinkler head of my invention is made up of a main body including a base portion 1 having a cavity 2 threaded to screw upon a standard, not shown, for supplying Water under pressure. Further, the base is bored at 3 to communicate with said cavity 2 and is threaded to receive a screw 4 to be described in detail presently, Extending from said base is a pair of arms 5, for example, which curve outwardly and upwardly and meet in a yoke portion 6 provided with a bore 7 threaded to receive a plug 8 having, in this case, a slot 9 to receive a screw driver or sim'- ilar tool, there being a jamb nut 10 carried by the screw adapted to engage the said yoke portion 6. In the inner end of the screw 8 is a conical recess 11 which receives the coned end of the stem 12 of the spray member denoted in general by the character 13.

The screw 4 has a bore 4 and one end extends beyond the base 1 in the direction of the screw 8 and is splierically rounded, the center of the bore 4 and the rounded surface being substantially in line with the conical cavity 11 of said screw 8.

Said spray member 13 includes a body 14 hollowed out substantially as at 15, for example, and having a baseV portion 16 provided with a bore 17 to communicate with the bore 4 of said screw' 4, the said base portion16 of the member having in its lower surface a concavity 18 corresponding substantially to the curve of the exposed end of said screw 4, to

receive the same. f Y

In a study of Figure 1 it will be seen that the surface of the body 14 at the bottom pf the hollow 15 curves from the base 16 upwardly and outwardly away from the center of rotation so that water pressure upon said surface will cause spinning of the spray member on its supports which vare the stem-12 and the spherically curved or ball surface of the screw 4. 'A l The surfaces of the concavity 18 and of theV screw 4 may directly engage throughout, or as in Figure l the rounded surface of the plug may be spaced from the surface of such concavity slightly so that the bearing may be an annular one, reducing friction somewhat. The surface within the concave may, however, be otherwise formed so long as a free ball and socket effect is obtainable. By an adjustment of the screw 8, of course, the member 13 may be permitted as free movement as desired, any desired position of the plug being maintained by said jamb-nut 10.

The ball joint is located at the base portion 1 where there will be no likelihood of its being Vsame lbeingheld in a driving fit in damaged or thrown out of position while the other end of the member 13 is supported above at the screw 8. Now, since the said ball joint is below upon a rigid part of the sprinkler head it is clear that should the arms 5 becomev bent in any direction or in any way by aceident so that the screw 8 is moved from its nory mal position as manufactured, with the axis of rotation of the'member 13 at an angle to` the bore 4, for example, the said member can still rotate since the baseVv portionwli Vwill merely move over the spherical surface olf the screw 4 to a new position.

The spread of the conical recess 11 of theY screw 8 may be preferably' greater than the angle of the coned end of thel stem 12, as shown, so that the point of said stem will seat in said recess-for proper action even in ex.- treme` cases, the only adjustment necessary beingv that'ot movement of-the. screw 8 to ren moveany pressure or binding and thus. restoring free rotation.

The plug 4 while preferably a separate part of the structure formanufacturing'reasons, i. e., to more readily form the rounded lsurface that receivesfthe member 13, may be omitted and said rounded lsurface may be formed on lthe body. 1 and be equally effective. Y On the other hand, it is preferable to make the said screw 4 of hardened steelto withstand wear, besides i-n a measure reduce frietion. Again, the stem 112 is preferably-1made of hardened steel.` for the samejreasons, the a socket 12ofthjemember`l3." Y j Iiclaim' A sprinkler head comprising a rigid body including a base having a passage 'and an I arm a portion of vwhich lies opposite and in spaced-relation to said base, as'orew adjustably mountedl in the said, arm opposite said vbase and having a 'conical socket, a rotor, ,Y a

stem inserted therein to engage in the said socket of the screw-,the other endof therotor having a cavity, 'and a screw adjustably mounted in said baseopposite therstnamed screw-andhaving a spherically curved end to engage infthe cavity of the rotor, there being a passage extending through thela'st'na-med Y' l screw communicating withthe passage ofthe Y base, and there being'a'pass'age through that Y:srs

portion ofthe rotor having the eavity'cmmiinicatingwith 'they passage of'said last named-'screw In testimony whereofl aiiix my signature. MIQJEVVENl NELSON;

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