220 



combine a spray and solid jet in the same nozzle have resulted in con- 

 structions which are injurious to one or both of the jets; yet it may be 

 well to notice briefly what has been done. 



One of the simplest barrel nozzles lor spray and solid jet combined 

 was patented (I^o. 29994) January 31, 1860, by Mr. N. Hotz. The bar- 

 rel is of two segments joined by a pipe nut allowing the rotation of 

 either segment upon its own axis and independent of the other. The 

 ends are both closed at their juncture, each having a diaphragm thereat 

 perforated by two corresponding holes. The proximal septum is pre- 

 ferably of leather. When the parts are turned so that the holes are ex- 

 actly superposed one upon the other the liquid passes through in two 

 streams, which immediately meet to form a solid jet; but when these 

 holes overlap only slightly the currents through them are rendered 

 somewhat diagonal, and they join to form a spiral stream that gradually 

 disperses as a spray of rather coarse quality. When turned so that the 

 holes do not overlap each other at all, the passages are entirely shut off. 



A hose-pipe operating on the same principle is that claimed by Mr. 

 P.O'JSTeil, of Kalamazoo Village and County, Michigan, No. 219505, Sep- 

 tember 9, 1879. 



Messrs. J. Clifford and J. Gielow in 1877 (No. 191934), Mr. J. Clifford 

 again in 1880 (229521), and Messrs. J. H. Johnson and F. A. Hoyer in 

 1881 (No. 237386), all of Chicago, 111., patented nozzles having some 

 form of core or septum movable back and forth to shut oft* either one 

 or both of the two kinds of jet. The water is diverted around this core 

 to enter the barrel, which discharges it as a spray or solid jet. Two or 

 more eccentric inlets to the barrel introduce in it the rotation. A single 

 inlet would be preferable, as I have already observed. The lack of a 

 central passage through the core, as an unobstructed way for the solid 

 jet, is an obstacle to both jets, but mostly to the solid. A nozzle hav- 

 ing this same objection and a single crooked passage for both jets was 

 patented by Mr. W. M. Clarke, of Newark, N. J., in 1881 (No. 248555), 

 which, as nowmade,*is illustrated in longitudinal section in Plate XXYl, 

 Fig. 5. The piece, w, turns snugly in the shell, z^ and is held therein 

 and prolonged by the piece, w. There is no direct passage, but all the 

 water must pass around the septum, j, through the course, xr x'. The 

 ends of this arched passage are shown as communicating fully with the 

 holes, X X. In this position a solid jet passes through ; but when the 

 outer shell is turned so that the holes mentioned only coincide by one- 

 half their area or less, the discharge into their barrel, i s, is eccentric, 

 and causes a rotary spray of fair quality, the volume of which can be 

 graded by turning farther or less. 



Most rotary spray-pipes that have come to my knowledge use a cross 

 plug. Three of these, one patented by Mr. J. W. McGaffey, of Chicago, 

 111., in 1870 (No. 170753), one by Mr. J. H. Johnson, of Chicago, in 1877 

 (No. 198515), and another by Mr. J. W. Gray, of Hartford, Conn., in 

 1878 (No. 203539), have a so-called ''3-way plug," having a large hole 



