US2557838A - Fire extinguisher nozzle - Google Patents

Description

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7. CXA? w|\ A. B. PHISTER FIRE EXTINGUISHER NOZZLE Filed Nov. 28, 1947 June 19, 1951 BY ATTORNEYS.

Patented June 19, 1951 FIRE EXTINGUISHER NozzLE Albert Brown Phister, FortThomas, Ky., assignor ito The Phister Mfg. 0., Cincinnati, Ohio, a

corporation of Delaware Application November 28, 1947, Serial No.788,510

My invention relates tore extinguisher nozzles and'particularly to the nozzle adapted to be :retained on the flexible tube through which the fluid is directed toward the source of the fire.

As typical Yof -a -ty-pe `of fire .extinguisher with which Vmy new nozzle is adapted to be used, .reference ishereby made to my Patent No. 1,794,982 of March 3, 19371. Inan extinguisher of this type there vvis a receptacle for a supply of liquid Aand a chamber for retaining a charge of compressed gas. A single actuator voperates both the valve from the compressed gas chamber to the liquid receptacle, and from the liquid receptacle to the discharge hose through which the extinguishing fluijdis directed `toward the fire. On the end of the discharge hosethereis a spray nozzle which may be manually controlled to regulate the volume and subdivision of the liquid into a spray or a substantially solid stream according to the particular requirements.

Ordinarily the person using the extinguisher supports it with the left hand and manipulates the spray nozzle, after opening the control Valve on the extinguisher, with his right hand. It has been found in nozzles heretofore in use that the facility of operating the nozzle, which usually has a thumb actuated lever, is often impaired by the hose causing the nozzle to be presented upside down or crosswise, so that actuation is extremely awkward and difficult.

It is toward the provision of a nozzle which may be turned without effort so that its thumb actuated lever will fall in a convenient position for easy control that my invention is directed. This not only greatly facilitates use of the extinguisher but increases the safety factor of the use of the extinguisher precisely at that time when its proper use will do most toward control of the fire.

The foregoing objects and other objects to which reference will be made in the following description and in the drawings, I accomplish by that certain arrangement and combination of parts of which I have shown a preferred modication.

In the drawings:

Figure 1 is a sectional view lengthwise of the nozzle. n

Figure 2 is a sectional view along the lines 2 2 in Figure 1.

Figure 3 is a detail fragmentary View showing a modified type of coupling.

In the drawings on the flexible tube I, the tapered corrugated sleeve 2 is retained by means of a clamp ring 3. The tapered sleeve has a `1 claim. (ci. .a99- 129)l flange 4 which'may be 'circumferentially flattened to be received within the jaws of a wrench. A fcollar`15 preferably :formed integrally with the sleeve`2 has a cylindrical `end forming a bearing i6 Awhich is internally threaded 'as indicated atl.

A yoke member 8 has a round annular base 9 which 4has .an internal .borewhich permits it to be .fully rotatable on the cylindrical end 6. A threaded nozzle .plug IIJ has an orice I I extending therethrough. Surrounding the orifice the walls of the plug form a valve seat. 'The plug has a reduced inner end 'I2 threaded as indicated at 'I3 for engaging 'the internal threads 'I of the cylindrical end 6 of the sleeve.

'The yoke :8 has apo'st AIll secured betweenthe arms .of the yoke and a trunnion 15 which journals the turned down flanges IB of the thumb actuating lever I'I. The lever has a thumb engagement portion I8 and an extension I9 to Which is secured a conical member 20. The apex of the cone forms a valve which engages the seat formed by the wall surrounding the orifice I I of the plug and thus forms a spray controlling valve. The

' elements 8, 9, Ill, I5, I1, I8, I9, mounted on the trunnion or axle I5, provides the thumb lever actuator assembly and as noted it is freely rotatable about the axis of the tube.

By pressing down on the portion I8, the apex of the conical member is moved out of engagement with the seat surrounding the orifice Il. With the initial movement the stream first is directed against the wall of the cone so as to spread out and form a spray in a wide arc. Further depression of the thumb piece I8 results in clearing the cone 20 from the path of the spray which is then projected in the form of a stream.

The particular feature of the construction which facilitates movement of the control for the nozzle to a position of convenient control is the yoke construction with its annular external bearing element 9, which rotates freely on the cylinder bearing 6. The base portion 9 is restrained from lengthwise movement by its end edges which flt between the collar 5 and the flange 2| of the plug which also is preferably conveniently circumferentially flattened for engagement by a wrench.

The modification shown in Figure 3 is the same as that shown in Figures l and 2, excepting that instead of the sleeve having a tapered corrugated tip, it is provided with a threaded end 22 which engages within the threads of a coupling member 23 held in position on the hose with a ring clamp 24.

To keep the thumb lever with the spray contro1 valve in closed position, a spring member 25 having an end 26 extends along underneath the thumb piece. The springillustrated makes several turns about the trunnion member I5 and has its inner end 21 blocked by contact with the post Modifications in the specific details of structure will readily occur to those skilled in the art. While this construction of spray nozzle is particularly adapted for re extinguishers it will, with slight modication, serve a useful purpose on garden spray apparatus and the like.

In the use of the device it has been found that without a deilector plate, suchas is indicated at 28, the spray at the initial start of opening the valve will run up on the inside of the lever I1 and cover the person using the device with spray. Accordingly, the deiiector plate to prevent this has been found desirable.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A spray nozzle provided with means for attachment to a exible tube through which liquid is projected under pressure and comprising a nozzle tip assembly having a valve seat member provided with a discharge orifice extending medially therethrough, said nozzle tip assembly having an external cylindrical bearing surface, a ,cone shaped valve of such size and shape as to act as a deflector when moved from said valve seat, a pivoted thumb lever on which said valve is mounted havingspring tensioned means to urge said valve against the seat, an annulal` base member having an internal bearing surface adapted just nicely to engage said external cylindrical bearing surface for rotation about the axis of said discharge orifice, said base member being fixed against axial movement with respect to said nozzle tip assembly, and means for pivotally mounting said thumb lever on said annular base, said last mentioned means comprising a pair of extensions xed to said annular base member, a trunnion mounted on said extensions, a pair of flanges xed to said lever and journaled on said trunnion, a pin mounted between said extensions, and a torsional spring surrounding said trunnion, one end of said spring engaging said lever and the other end of said spring engaging said pin.

ALBERT BROWN PHISTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 191,964 Holloway June 12, 1877 540,818 Oulton June 11, 1895 565,290 Melavin Aug. 4, 1891:` 683,317 McBoyle Sept. 24, 1901 832,097 Thomas Oct. 2, 1906 2,054,517 Moll Sept. 15, 1936 2,171,501 Gebauer Aug. 29, 1939 2,251,812 Watling Aug. 5, 1941 2,378,451 Vensel June 19, 1945 FOREIGN PATENTS Number Country Date 1,917 Great Britain Jan. 27, 1896 475,286 France Feb. 15, 1915

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