US1230487A - Spray-nozzle. - Google Patents

Description

J. A. JOHNSTON.

SPRAY NOZZLE.

APPLICATION FILED JAN. l7. l9l6.

1,230,487. Patented June 19, 1917.

FFIQE.

JOHN A. JOHNSTON, OF SPRINGFIELD, 'MASSACI-IUSETTS.

SPRAY-NOZZLE.

Specification of Letters Patent.

Patented June 19, 1917.

Application filed January 17, 1916. Serial No. 72,433.

To all whom it may concern:

Be it known that I, JOHN A. JOHNSTON, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented a new and useful Spray-Nozzle,of which the following is a specification.

This invention relates to a nozzle for use in spraying heavy liquids that have to be sprayed in a molten or heated condition. Ordinarily the valves which are used for spraying these liquids are likely to get clogged up when not in use on account of the liquid hardening in the passages and ports thereof. v

The principal objects of this invention are to provide a construction of nozzle in which the liquid will flow through the openings of the valve when the latter is .in closed condition, thus keeping them always free and preventing the hardening of the liquid in the passages; to provide means whereby during spraying a bypass will be provided so as to supply a valve further along in the system; and to provide means whereby the valve is held to its seat in a simple and eflicient manner.

Reference is to be had to the accompanying drawings, in which Figure l is an elevation of a series of valves showingtheir application to one system of spraying;

Fig. 2 is a sectional view on the line 22 of Fig. 1.

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Figs. 3 and 4 are sectional views on the line 34 of Fig. 2 showing the valve in two different positions; 7

Fig. 5 is an end view looking into the valve casing;

Fig. 6 is a view of the opposite end of the valve;

Fig. 7 is a plan of a system of piping showing another way in which this inven tion can be applied; and

Fig. 8 is a sectional view similar to. Fig. 3 showing a modified form of valve for use with this system.

Referring first to the first six figures, the invention is shown in a form in which the heavy coal tar or other liquid to be sprayed is passed through a pipe 10 and through a series of valves arranged at intervals along said pipe. In this system the liquid has to go through one valve before it reaches another. They are, so to speak, in series. In this case each valve comprises a casing having a conical part 11 which has an inlet passage 12 and an outlet passage 13, preferably diametrically opposite. Between these two is a passage'l. A by-pass 15 is shown of a semi-circular form extending from the passage 12 to the passage 13.

lVithin this casing is a conical valve 16 which is provided with an opening 17' for spraying which communicates with an interior space of the valve by'means of two fine ports 18 for spraying. The interior of the valve iscut away to form a rear passage 19 which extends substantially across the valve, but an abutment or apron 20. is shown stopping this passage at a certain point. The bypass 15 is not quite, but nearly, of the same area in cross section as the two passages 12 and 13. V o

These parts are so arranged that the valve can be turned to two positions indicated in Figs. 3 and/l respectively. In the former of these positions the opening 17 registers with the passage 14 and liquid issprayed out under pressure in two fine streams. The abutment 20 serves to prevent direct pas sage of the liquid through the inlet 12 to the outlet 13, but some'can pass out to supply the next valve. In the position shown in Fig. 4 the valve is turned so as to cut off the passage 14, but at the same time the opening 17 is made. to register with the inlet passage 12. In this way the liquid coming through. this valve and passing along'to the neXt one through the outlet 13 has a passage through the ports 18 and also through the bypass 15v so that the valves I along the line can be supplied in either position ofthis valve, and the ports 18 arekept clear by theconstant-fiow of liquid through them.

Further features of construction are shown in Figs. 2 and'6. The valve 16 is provided with an axial projection 21 of a non-circular cross section, in this case shown square. On the valve casing 11 is a cap 22 which has projections 23 looking under lugs 24 on the casing when the cap is turned to certain positions for the purpose of holding the cap securely in place. The cap is provided with a socket receiving and fitting the projection 21 and with a non-circular end 25 so that a wrench or handle 26 can be applied to it to operate the cap 22 and con sequently the valve. This cap is provided with a screw 27 for holding the valve to its conical seat.

In the form shown in Figs. 7 and S the system is what may be called multiple. In this case there is a supply pipe 30 and a parallel discharge pipe 31. These are connected by a number of parallel pipes 32 in each of which is a valve casing 11. In this case the valves are of the same form as shown in the first six figures with the exception of the elimination of the bypass 13. In this case it is not necessary to allow suflicient liquid to pass through the valve when closed to supply another valve, and consequently no bypass is required. But nevertheless the liquid passes through the ports 18 and keeps them free no matter whether the valve is open or closed.

Although I have illustrated and described only certain forms of the invention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as eXpressed in the claims. Theretore I do not wish to be limited to all the details of construction herein shown and described, but what I do claim is 1. In a nozzle for use in spraying heavy molten materials, the combination with a casing having three passages through its walls, two flow passages and a discharge passage between them, of a valve fitting in said casing and having a jet spray opening for spraying through said discharge passage, and a passage communicating with said opening and extending through the valve, said passage in the valve being arranged to form a bypass for conducting the liquid through the nozzle from .one side to the other at all times when said opening is closed.

2. In a nozzle for use in spraying heavy molten materials, the combination with a casing having two passages through its walls constituting the inlet and outlet, and a third passage between them, of a valve fitting in said casing and having a passage therethrough, an opening for spraying ex tending from said passage in the valve and adapted to register with the third passage in the valve casing, said passage in the valve being arranged to register with the inlet opening in the valve casing when said open- Copies of this patent may be obtained for five ings register with the third passage thereof and to register with either the inlet or outlet passage in the valve casing when said opening for spraying is turned to inoperative position or into register with the other of said passages.

3. In a nozzle of the class described, the combination of a casing having an inlet passage at one side and an out-let passage at the opposite side, a bypass extending from the inlet passage to the outlet passage in the wall of the casing around one half the same, and athird passage on the opposite side of the casing between the inlet and outlet passages, with a valve in said casing provided with a rear passage adapted to connect the inlet and outlet passages of the casing when the valve is turned to a certain position and provided with a pair of converging passages terminating in a port on the outer side of said valve for registering with the third passage in the casing when said valve is turned to one position, said valve having means for closing the third passage when it is turned to a position in which said ports register with the inlet passage, whereby the liquid will be permitted to flow through the valve when the said third passage is closed.

4.. As an article of manufacture, a spraying nozzle having a passage for producing a spray, a valve in said nozzle and constituting a part thereof, said nozzle having means for permitting the circulation of liquid therethrough when the valve is moved to such position as to prevent spraying through said spray passage, and means for preventing the clogging up of said spray passage by directing liquid therethrough when not delivering a spray.

5. As an article of manufacture, a spray nozzle for spraying heavy liquids comprising a casing having an opening for spraying, an oscillatable valve for opening and closing said opening having a spray passage and means for preventing the clogging up of said spray passage when said opening is closed.

In testimony whereof I have hereunto set In hand.

y JOHN A. JOHNSTON.

cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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