US2484942A - Nozzle construction - Google Patents

Description

A. B- GUlSE NOZZLE CONSTRUCTION Get. 18, 1949.

3 Sheets-Sheet 1 Filed March 28, 1946 fiavezzzor yfr/Zar Z3 Guise Oct. 18, 1949. A. B. GUISE 2,484,942

NOZZLE CONSTRUCTION Filed March 28, 1946 3 Sheets-Sheet 2 Oct. 18, 1949. A. B. GUISE NOZZLE CONSTRUCTION 3 Sheets-Sheet 3 Filed March 28, 1946 Patented Oct. 18, 1949 -UNITED STATES PATENT OFFICE I e U 2,484,942

NOZZLE CONSTRUCTION Arthur B. Guise, Marinette, Wia, assignoi- "to Ansul Chemical Company, Marinette,'Wis., a corporation of Wisconsin Application March 28, 1946. Seriai No. 657,657

3 Claims.

- This invention relates to a dual-stream nozzle construction. More specifically, this invention relates to a nozzle construction for use with dry chemical fire extinguishers for selectively producing either a straight'stream having a long range and relatively high velocity or a fan-shaped stream having'a shorter range and a relatively low velocity from a single supply source of dry chemical.

The nozzle construction of the present invention is particularly adapted for producing selectedstreams-of powdered dry chemical having a predetermined-velocity and shape adapted for ex-- tinguishing gasoline, kerosene and paraifin oil fires and the like, the dry chemical being propelled through the nozzle by an inert gas, such as nitrogen or carbon dioxide under high pressure. The nozzle is provided with a rotatable plug type valve controlled by an exterior handle which permits the dry chemical to discharge either through a smooth bore cylindrical discharge channel for producing a straight stream, or through another discharge channel provided with a special nozzle tip, construction for producing a fan-shaped stream.

Further objects and advantages of the invensealingring for the valve plug,

Figure 11 is a sectional view taken on lines v l-l-ll of Figure 8, e

Figure 12 is a flagmen'tal view of the disassembled nozzle body taken along lines,l2-l2 of Figure is a perspective :view of a piston-type Referring to the drawi ngs,- the dual-stream nozzle is constructed of a suitable metal, preferablyof a corrosion-resistant aluminum alloy,- in the form of a tubular hollow body- ID of the general contour illustrated inl igures l and 2 having asmooth cylindricalinternal intake bore 9 tion 'will be apparent from the following speciflcation and drawings wherein,

Figure 1 is a side .view of the nozzle, constructed in accordance with the present invention,

Figure 2 is a plan view of the nozzle,

Figure 3 is an end View of the nozzle at its discharge end,

Figure 4 is an enlarged fragmental view of the nozzle at the valve region,

Figure 5 is a plan view of the nozzle taken along lines 5-5 of Figure 4,

Figure 6 is an enlarged partly broken vertical sectional view of the nozzle showing the valve in closed position.

Figure 7 is an enlarged sectional fragmental view of the nozzle at the valve region showing the valve port communicating with the upper channel for producing a fan-shaped stream of dry chemical,

Figure 8 is an enlarged sectional fragmental view of the nozzle at the valve region showing the valve port communicating with the lower channel for producing a straight high velocity stream,

Figure 9 is a fragmental sectionalview taken on lines 99 of Figure 6,

Figure 10 is a sectional view taken on lines l0- Ill of Figure 7,

terminating in a socket portion l I which is provldedwith threads 11 internally thereof for coupling to a hose 5'which is connected to a suitable source of gas pressure for feeding dry powdered chemical to the intake bore 9 of the nozzle. A gasket I8 is seated in the base of the socket to provide a fluid tight connection.

The body ill of the nozzle increases slightly in taper and enlarges to asubstantially cylindrical chamber l5 open at the top and bottom for seating therein a cylindrical rotatable valve plug 20 which fits snugly therein. Plug 20 is provided with a cylindrical stem 25 as shown in Figure 13 which projects outwardly of the nozzle body and is provided with a bore hole 24 for receiving locking pin 1, as shown in Figure 6, for retaining a handle M. The locking pin also passes through a bore i4 provided in the handle as shown in Figure 4. Ha'ndle I4 is also provided with a cylindrical bore 26 for snugly receiving the extension 25 of the plug 20. An enlarged terminal knob i6 is provided on the handle for facilitating grasping and moving same to any desired position. Handle I4 is provided with an integral stop portion 3 which is adapted to contact stop- lugs 30 and 3| respectively at the extreme left position, as shown in Figure 2, or at the extreme right position, as shown in Figure 8.

The lower face of the cylindrical portion I5 is provided with three spaced semi-spherical indents or depressions indicated by numerals 32, 33 and 34 which are adapted to slidably receive a lock indent ball 29 retained in a cylindrical bore 28 provided in the handle I4 which is normally actuated upwardly by'a coil spring 21 positioned within the bore 28. The lock indent ball serves to releasably lock the handle l4 at three plug 20 and plug seat, as shown in Figure 6, to

seal the plug as well as to facilitate its rotation by minimizing any binding action that might otherwise occur between the plug and its seat.

The plug 20 is provided with two drilled passageways or ports of substantially equal crosssectional area, indicated by numerals 2| and 22,.

which are positioned so that the longitudinal axes thereof are located at an angle of about 60 to each other, as indicated in Figure 11. The

' has a relatively high velocity and long range as upper port 2| is adapted to be aligned with a the intermediate or fan stream position shown in Figures 7 and 10, at which position the lock indent ball 29 will be engaged in the intermediate indent 33 opposite the words fan stream as shown in Figure 4. By rotating the handle it to the extreme right position or straight stream position so as to assume the position shown in Figure 8, port 22 will be aligned with the lower smooth bore cylindrical discharge stream channel 35, as shown in Figure 11. At this position the lock indent ball 29 will be engaged in indent 34 and stop portion 3 of the handle will contact stop-lug 3 i. If it is desired to shut off communication with both the upper and lower stream channels the handle is moved to the extreme left or closed position, shown in Figures 2 and 4, at which position stop portion 3 of the handle it is in contact with stop-lug 30 and lock indent ball 23 is engaged in indent 32. The valve plug 20 will then assume the position shown in Figures 6 and 9 in which position communication with the intake portion 9 of the nozzle and forward discharge portion I3- is cut off.

Upper stream channel 36 is provided with a conical plug or nozzle tip 31 positioned inwardly of the discharge mouth of the nozzle and is retained in seat 39 by a setscrew 2. tip 31' has two substantially circular orifices 38 diametrically opposite each other and perpendicular to the tapered portion as shown in Figures 6 and 7. When handle I4 is moved to its intermediate position so as to align port 2| of valve plug 20 only with stream channel 36, dry chemical supplied under pressure from a hose 5 will be expelled through the orifices 38. The discharge-of dry chemical through these orifices and impingement of the dry chemical against the internal cylindrical walls adjacent the mouth of the nozzle results in the emission of a low velocity flat fan-shaped stream of dry chemical. The novel features of the conical nozzle tip are fully disclosed and claimed in copending application, Serial No. 657,658 filed concurrently.

The lower stream channel 35 is a straight unobstructed cylinder bore which is adapted to produce a stream of dry chemical of a straight or normal contour, that is, substantially circular in cross-section and is substantially equal to the cross-sectional area of channel 36. This stream The nozzle,

compared with the fan-shaped stream emissible from channel 36 which is of shorter range. When the handle I4 is moved to the extreme right, the port 22 of valve plug 20 will communicate only with the stream channel 35 and no chemical will be fed to the upper channel 36.

It will thus be understood that the valve plug 20 and handle id have three positions, namely: closed, fan stream or relatively low velocity, and straight stream or relatively high velocity. The handle I4 is releasably locked by the spring and ball indent and can be released from any one of its three positions by applying manual pressure on the handle to release the indent ball from its locked position so as to permit the handle to be moved to any other desired position.

The nozzle of the present invention is particularly adapted for use with dry chemical fire extinguishing equipment. In fighting came, the nozzle is then opened, usually to the high velocity straight stream position at the start to reduce the fire intensity and bring the tire under control, after which the nozzle is changed to the fan stream position and the fire is then approached more closely, sweeping the flames ahead of the operator by a side-to-side motion of the nozzle to complete the extinguishment. The flames are extinguished by the formation of a blanket of inert gas and water vapor resulting from the decomposition of the dry chemical by the heat of the fire which temporarily cuts off the oxygen supply to the zone of combustion. The approximate maximum effective stream range may vary for example from 35'to 45 ft. for the straight stream and approximately 10 to 15 ft. for the fan stream.

The present nozzle construction greatly increases the effectiveness of the use of dry chemical for extinguishing oil, gasoline, kerosene and alcohol fires by providing two types of fire fi hting streams to be used in quick succession and in proper sequence as previously explained. The operator can readily shift from one type of stream to the other by merely actuating the valve handle in order to combat most effectively the type of fire to be extinguished with the greatest speed and safety to the operator.

It is to be understood that numerous changes and modifications may be made in the specific embodiment of the invention herein disclosed and it is intended to include such modifications within the scope of the appended claims.

I claim:

1. A dual-stream nozzle for selectively emitting streams of relatively different velocities but having substantially the same rates of flow comprising a nozzle body having a smooth bore intake duct, a rotatable valve plug closing one end of said duct, spaced ports of substantially equal cross-sectional area provided in said valve plug, a discharge nozzle portion communicating with said valve plug, said discharge portion having two separate substantially parallel stream channels of substantially equal cross-sectional area adapted to communicate selectively with said valve plug ports, one of said channels being provided with means adjacent the mouth thereof for substantially reducing the velocity of the emitted stream in relation to the stream velocity within said stream channel and predetermining the shape of the emitted stream.

2. A dual-stream nozzle for selectively emitting streams of relatively difierent velocities but having substantially the same rates of flow comprisinga nozzle body having a smooth bore intake duct, a rotatable valve plug closing one end of said duct, spaced ports of substantially equal cross-sectional area provided in said valve plug, a discharge nozzle portion communicating with said valve plug, said discharge portion having two separate substantially parallel stream channels of substantially equal cross-sectional area adapted to communicate selectively with said valve plug ports, said valve plug ports being adapted for positioning in direct alignment selectively with said stream channels and said intake duct; one of said channels being provided with means adjacent the mouth thereof for substantially reducing the velocity of the emitted stream in relation to the stream velocity within said stream channel and predetermining the shape of the emitted stream.

3. A dual-stream nozzle for selectively emitting streams of relatively different velocities but having substantially the same rates of flow comprising a nozzle body having a smooth bore intake duct, a rotatable valve plug closing one end of said duct, spaced ports of substantially equal cross-sectional area provided in said valve plug, circumferential channels provided adjacent the ends of said plug, spring piston-type sealing rings positioned in said channels, a discharge nozzle portion communicating with said valve plug, said REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 150,376 Tomlinson Apr. 28, 1874 170,138 Westland Nov. 16, 1875 1,333,048 Webster Mar. 9, 1920 1,483,277 Broome Feb. 12, 1924 2,337,321 Freeman Dec. 21, 1943 FOREIGN PATENTS Number Country Date 12,660 Norway Feb. 15, 1904 525,688 Great Britain Sept. 3, 1940

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