US2674324A - Automatic pressurized fire extinguisher - Google Patents

Description

April 6, 1954 R. H. MAscARlNl 2,674,324

AUTOMATIC PRESSURIZED FIRE EXTINGUISHER Filed April 2, 1952 ANW l, 3y/MXP AT TORNEY Patented Apr. 6, 1954 UNITED STATES PATENT OFFICE AUTOMATIC PRESSURIZED FIRE EXTINGUISHER Ronald H. Mascarini, Kearny, N. J.

Application April 2, 1952, Serial N o. 280,070

6 Claims. l

My invention relates generally to lire extinguishers and specifically to improvements in automatic pressurized hre extinguishers adapted to disseminate a lire extinguishing uid over a Wide area.

It is among the objects of my invention to provide an improved automatic pressurized fire extinguisher which is sensitive, safe, and sure acting.

It is among the further objects of my invention to provide an automatic pressurized fire extinguisher which is simple in form, sure acting and relatively inexpensive to maintain, assemble, install and operate.

Yet another object of my invention is to provide an automatic pressurized re extinguisher which stores the fire extinguishing fluid under normal pressure.

Still a further object of my invention is to provide a lire extinguisher which has a discharge nozzle which is adapted to disseminate its contents over a wide area.

Yet another object of my invention is to provide a fire extinguisher which is simple to rearm and refill.

These objects and advantages, as well as other objects and advantages, are achieved by the device illustrated in the drawings, in which:

Figure 1 is a side view of my re extinguisher;

Figure 2 is a vertical cross-sectional view of my fire extinguisher showing it in its ready state;

Figure 8 is a vertical cross-sectional view showing it in its activated state;

Figure 4 is a view in perspective of the cartridge bracket;

Figure 5 is a side view of the plug and shaft connected therewith;

Figure 6 is a side view of the retainer;

Figure 7 is a side View of the clip;

Figure 8 is a side view of the fusible links; and

Figure 9 is a view in perspective of the retainer, clip and link assemblage.

Referring now to the drawings in detail, my fire extinguisher is formed of a container Il. A discharge nozzle l2 is formed at the bottom of the container. A wall I3 separates the discharge nozzle I2 from the main portion of the container I I, The wall I3 has a uid passage I4 in the center. The iiuid passage is surrounded by a seat I5 which is adapted to receive a plug I6. The plug I6 and seat I5 constitute a valve for containing or releasing a fluid in the container II. A bracket I1 is attached to the container II by being screwed into a threaded passage I8 in the wall I3. 'The bracket l1 has a guide arm I9 extending over the passage I4. A shaft 20 is slidably positioned in a passage 2| in the guide arm I9, and is attached to the plug IB. The lower side of the plug has a corresponding shaft 22. A spring 23 carried by the shaft 20 normally urges the plug I6 into blocking engagement with the seat I5 defined by the walls of the uid passage I4. This spring 23 bears on the bottom of the arm I9 and the top of the plug I6.

Another spring 24, which is stronger than the spring 23, and carried by the shaft 22, normally urges the plug I6 upward and unseats it. This spring 24, is held by the U-shaped retainer 25 whose legs 26 pass through the bottom of the container Il and are held in this position by a spring lclip 21 whose ends are held together by the links 28. The links are held together by a low melting point solder 29. When sucient heat melts the solder 29, the links 28 separate, the spring clip 21 opens, and falls off the notches 30 on the legs 26 where it was seated. The retainer 25 then releases the spring 24, which then unseats the plug I6, permitting any fluid in the container to enter the discharge nozzle I2, and leave through the holes 3|.

The bracket I1 has a channel 32 formed in an extended portion 33. A resilient guide 34 having out-turned ends 35 will slide into this channel. The top of the shaft 20 has a cup-like seat 33 for a CO2 cartridge 39 which the guide 34 holds loosely in place. The top of the bracket I1 has an arm 3B which is provided with a piercer 31.

The container II is provided with a lid 40 which screws on to seal the container. The center of the lid 40 has an opening 4I into which a filler cap 42 is screwed. The outer top edge 43 of the container has a thread which will engage a corresponding threaded ange on the attachment plate 44. The attachment plate 44 may be secured by screws 45 (or in some other suitable manner) to the ceiling or roof.

My fire extinguisher is installed by aflixing the attachment plate 44 to the roof or ceiling by screws 45, or in some other desired manner. The container is then armed by causing the retainer 25 to compress the spring 24 so that the legs 26 extend through the bottom of the discharge nozzle I 2. The spring clip 21 is then applied to the legs 26 and seated in the notches 30. The spring clip is compressed and the fusible links 28 slipped over the ends. This permits the light spring 23 to function and to seat the plug I6 to firmly block the fluid passage I4. The CO2 cartridge 39 is then placed upon the seat 38 and the resilient guide is slid down around the cartridge into the channel 32. A light spring 43 -will keep the top of the cartridge from striking the piercer 31 should the container II be inverted. The container H may then have its lid 40 applied. The plug 42 may be removed and a lire extinguishing fluid inserted to a suitable level` Observation of the level of the extinguishing fluid may be made through the window 41. The plug may then be restored and the container I I screwed into the attaching plate A rise in temperature will cause the separation of the fusible links 23. The spring clip 21 springs open and disengages itself from the notches 30. This releases the spring 24 which will raise the plug I6 so that the nre extinguishing fluid goes through the fluid passage I4 into the discharge nozzle l2. The rising of the plug I6 impelled by the strong spring 24, compresses the lighter spring 23. The CO2 cartridge 39 is urged upward by the seat 38 on which it rests and is forcibly brought in contact with the piercer 31. This releases the carbon dioxide gas in the cartridge and creates pressure in the container Il so that the fire extinguishing fluid is urged out of the container into the discharge nozzle under considerable pressure. The pressure forces the fire extinguisher iiuid 46 out of the holes 3l under considerable pressure and sprays it to a substantial distance from the container l l. The fire extinguisher may thereafter be rearmed in the same manner in which it was loaded as previously described.

The foregoing description is merely intended to illustrate an embodiment of the invention. The component parts have been shown and described. They each may have substitutes which may perform a substantially similar function; such substitutes may be known as proper substitutes for the said components and may have actually been known or invented before the present invention; these substitutes are contemplated as being within the scope of the appended claims, although they are not specifically catalogued herein.

I claim:

l. A fire extinguisher comprising a valve, a rst spring normally urging the valve open, a second spring of less strength than the rst spring normally urging the valve closed, a bracket having upper and lower arms, a shaft attached to the valve and extending through the lower arm, a seat defined by the top of the shaft, a cartridge of compressed gas positioned on the seat and cooperatively movable therewith, a piercer depending from the upper arm, and a heat-reactive means for releasably securing the rst spring.

2. .A re extinguisher comprising a valve, a rst spring normally urging the valve open, a second spring of less strength than the first spring normally urging the valve closed, a retainer engaged with the first spring, a clip engaged with the retainer and holding it in compressing relationship with the first spring, links engaged with the clip and holding it in engagement with the retainer, material having a predetermined fusion point holding the links together, a rst shaft depending from the valve, a second shaft rising from the valve, a sca-t defined on the top of the second shaft, a cartridge of compressed gas positioned on the seat and cooperatively movable therewith, a bracket, upper and lower arms on the bracket, the second shaft passing through the lower arm, and a piercer depending from the upper arm.

3. A nre extinguisher comprising a container, a nozzle formed at the bottom of the container, a wall separating the nozzle from the container having a fluid passage defining a seat, a plug adapted to engage the seat, a shaft depending from the plug, a spring carried by the shaft and normally acting to unseat the plug, a retainer for the spring, a clip engaged with the retainer to maintain it in compressing relationship with the springy links engaged with the clip and holding it in engagement with the retainer, material having a predetermined fusion point holding the links together, a shaft rising from the plug, a guide arm for the shaft, a seat defined at the top of the shaft rising from the plug, a cartridge of compressed gas positioned on the seat and cooperatively movable therewith, a spring carried by the shaft rising from the plug and normally urging the plug into engagement with the fluid passage defining a seat, said spring exerting less force than the spring carried by the shaft depending from the plug, and a piercer positioned over the discharge end of the cartridge.

4. A re extinguisher comprising a container, a nozzle with a plurality of openings formed at the bottom of the container, a well separating the nozzle from the container having a fluid passage therein defining a tapered seat, a tapered plug adapted to engage the seat and block the fluid passage, a shaft depending from the plug; a spring carried by the shaft bearing on the nozzle and normally acting to unseat the plug; a retainer carried by the shaft and over the top 0f the spring, notched legs on the retainer extending through the wall of the nozzle; a clip position outside the nozzle and engaged with the notches of the retainer to maintain the spring compressed, said clip being resilient and normally extended wider th-an the legs of the retainer, links engaged with the clip, material having a predetermined fusion point holding the links together, a shaft rising from the plug, a bracket attached to the wall, a guide arm having a passage for the shaft rising from the plug, a seat defined at the top of the shaft rising from the plug and cooperatively movable with the plug, a cartridge of compressed gas positioned on the seat, a spring carried by the shaft rising from the plug bearing on the guide arm and normally urging the plug into engagement with the seat, said spring exerting less force than the spring carried by the shaft depending from the plug, an arm on the bracket extending over the cartridge, and a piercer mounted on the arm for engagement with the discharge end of the cartridge.

5. A re extinguisher comprising a valve, a first spring engaged therewith, a heat reactive means for securing the first spring from normally urging the valve open, a second spring of less strength than the rst spring normally urging the valve closed, a bracket having upper and lower arms, a shaft attached to the valve and extending through the lower arm, a seat defined by the top of the shaft and cooperatively movable with the valve through the action of the rst spring, a cartridge of compressed gas positioned on the seat, and a piercer depending from the upper arm.

5. A fire extinguisher comprising a chamber for a re extinguishing fluid, a valve in the said chamber for releasing the said fluid, a seat for a cartridge of compressed gas cooperatively connected with the valve whereby the opening of the valve moves the seat, a cartridge of compressed gas positioned on the seat, a piercer in alignment with the discharge end of the cartridge, a spring normally urging the valve open whereby the opening of the valve moves the seat and projects the cartridge into piercing engagement with the piercer.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,909,837 Laengel May 16, 1933 1,983,637 Tinkham Jan. 22, 1935

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