US2620038A

US2620038A - Fire extinguisher

Info

Publication number: US2620038A
Application number: US162255A
Authority: US
Inventors: Charles H Somers; Sumner C Willis
Original assignee: Fyr Fyter Co
Current assignee: Fyr Fyter Co
Priority date: 1950-05-16
Filing date: 1950-05-16
Publication date: 1952-12-02
Anticipated expiration: 1969-12-02

Description

Dec. 2, 1952 Filed May 16, 1950 c. H. SOMERS ET AL 2,620,038

FIRE EXTINGUISHER 2 SHEETS-SHEET 1 CHARLES H. SOMERS q SUMNER (LT-WILLIS ATTo R N EY-i 1952 c. H. SOMERS ET AL 2,520,033

FIRE EXTINGUISHER Filed May 16, 1950 E 4 24 15 Flg-B 75 7 2B 000 no 80 54 22 Q 81 o 7 T 81 98 OZ 2 iiif h 3 15 v 7 \k CHARLES H. SOMERS Q 7 4 SUMNER c. WILLIS Z WQM ATTORNEYS 2 SHEETSSHEET g,

Patented Dec. 2, 1952 UNITED STATES PATENT OFFICE Willis, White Plains, N. Y., assignors to The Fyr FyterCompany, Dayton, Ohio, a. corpora- -tion-of Ohio Application May. 16, 1950,.Serial.No..162,255

13 Claims. 1

This'invention' relates to fire extinguishers, and more particularly to a fire extinguisher adapted for usewith 'a charge of dry chemical fire extin guishing material and provided-with a cartridge of compressed gas such as CO2 for developing pressure within the extinguisher to effect discharge ofthe fire extinguishing materialin use.

Inaccordance with the inventionfthere is provided a fire extinguisher of this character which is of simple and economical construction and which has material advantages from the standpoint of both convenience and reliability in use. In 'theextinguisher, a simple s'hell forms thecontainerfor'the charge, and a separatehead which is detachably secured to the shell supports all of the operating parts of the extinguisher. Instead of having the discharge hoseor .other outlet .attached to the lower part of the shell, in theextinguisher of the present invention,'the discharge hose or other outlet is directly securedtotheihead and is provided with a pickupitube within thecontainer which extends downwardly from the head to a position near the bottom of theshell. The gas-cartridge is also directly carried by the .head, and a connecting passage in the headleadsfrom the cartridge to a gas tube extending downwardly to the bottom of the shell to release the pressure gas at thebottom. of the shell insuch manner as to agitate the-charge during .the upward passage of the gas to the top of the container and thus to assure proper discharge of the fire extinguisher material through thepickup tube andLdisch-arge outlet.

This construction of the extinguisher with the discharge outlet at the head'has been found .to improve the maneuverability and manipulation of the extinguishen'and a handle is providedon the head to facilitate both carrying and use of the extinguisher. This handle also operates the piercing pin which opens'the gas cartridge for'initial actuation of the extinguisher, the arrangement being such that simple downward'movement of the handle about itspivoted connection to the head operates the pin. In "addition, when the handle is thenused to liftthe extinguisher for operation, the piercingpin will automatically be withdrawn from theruptured sealing disk of the cartridge to assure free flow of gas therefrom into thecontainer, while at the sametime stops are provided onthe handle and'headfor limiting upward movement of 'thehandle in the proper position for ready use during operation of .the .extinguisher.

Itis accordingly tone of theprincipal objects of the present inventiomto'providev a fireextinguisherof the above type for usewith a charge of dry chemical fire extinguishing material which is simple and economicalto construct, easy to use and refill, as well as reliable in operation, and wherein thehead for the shell carries all of "the operatingparts of the extinguisher and isthus readily applicableto containers of differentxsizes and charge capacities.

It is also an object-of the invention to provide such a fire'e-xtinguisher wherein the same handle employed for manipulation of the extinguisher during operation-also serves to actuatethe opening mechanism'forrthe pressure gas cartridgeand particularly to'provide such a handle whichis arranged to effect automatic withdrawal of the opening pin fromithe cartridge during use of the extinguisher and thus to assure unimpeded flow of pressuregas into the container portion of the extinguisher'for effectivedischarge of the charge.

Other objects and advantages of theinvention will be apparent from the following description, the accompanying drawing and the app-ended claims.

"In the drawings- Fig. 1 is aperspective view of afire extinguisher in accordance with the invention;

Fig. 2 is a vertical section of the extinguisher taken on the line'2'--2 ofFig. 4;

Fig. 3 is an enlarged fragment of ,Fig. 2 showing the operation of the piercing pin for thegas cartridge;

Fig. 4 is a top plan view of the extinguisher;

Fig. 5 is a view in rear elevation of the upper portion of the extinguisher;

Figs. 6 and '7 are enlarged fragmentary. sections on thelines 6--6 andl-J respectively of Fig. 4;

Fig. 8 is an enlarged fragmentary sectionon the line 8--8 of Fig. 4 showing the means forsecuring the head of the extinguisher tothe shell; and

Fig. 9 is an enlarged fragmentary view of the neck of the gas cartridge showing thesealing-clisk and plug assembly forthe cartridge.

Referring to thedrawing, which illustratesa preferred embodiment of theinvention, the shell l0 which forms the container ,for the charge of tomrim'of the shellas shown in'Fig. 2.

The upper end of'the shell [0 is provided with an annular dome i3 having a downwardly extending central flange M defining a large cylindrical opening l5. A reinforcing ring it is supported within the upper end of dome it by spinning over at H the lower edge of the fiange M. This ring I5 is provided with a plurality of tapped holes 18 as shown in Fig. 8 for receivin the mounting bolts 20 which secure the head 22 to the shell, and a gasket 23 is provided between the head 22 and dome Hi to seal this connection. A loop 24 is welded to the shell ii] to provide for hanging the extinguisher on a suitable wall bracket.

The head 22 supports all of the operating parts of the fire extinguisher, and it includes a filling opening 25 through the top thereof which is provided with a screw cap 26 and sealing ring 2?. At the front of the head is a discharge opening 3!) into which is threaded an elbow 3| to which the hose 33 is secured by means such as a ferrule 3 5. A nozzle 35 is secured to the other end of hose 33 by a ferrule 35, and the discharge passage 3? through the nozzle is controlled by a pin 40 which forms a slide valve and is controlled by a handle 4] pivoted to the nozzle at 42 and provided with a spring M. which normaliy urges the handle to the closed position of the valve pin 45. A pickup tube 65 is secured within the inside end of the discharge opening 35 in head 22, and this tube extends downwardly within the container to a position near the bottom and one side of the container and well below the upper end of the bottom member I l as shown in Fig. 2.

A spring clip to may be welded or otherwise secured to the side of the shell in for holding the nozzle during non-use of the extinguisher. Also, in order to prevent foreign matter from entering and possibly clogging the discharge passage 3l when the extinguisher is not in use, a rubber protector cap M is frictionally fitted over the end of the nozzle and is secured to shell it by a chain 48. Thus when thenozzle is removed from clip 46, the chain 48 will automatically pull cap ll from the nozzle to make it ready for use.

The gas cartridge 50 is provided with a threaded neck portion 5i which is received within a tapped socket 52 in the under side of a rearwardly projecting extension portion 53 of head 22. The upper surface of this head portion 53 is formed with a depression 54, and two drainage holes 55 are accordingly provided therethrough as shown in Figs. 4 and '7. A flat nut 55 is welded to the upper end of the cartridge to facilitate tightening of the threaded neck ill in socket 52, and a rubber gasket 5! is provided between the end of the cartridge and the base of the socket. The cartridge is also provided with a supporting clip 58 secured to the back of the shell Iii.

A vertical passage 60 connects the socket 52 with the horizontal passage (H which extends radially inwardly of the head to a position located inwardly of the central opening H5 in dome l3, and the under side of the head is formed with an annular boss 62 at the inner end of this passage 61, the outer end of passage 6| being sealed by a plug 55. A tube B l is inserted within the lower end of boss 62, and this tube extends downwardly and is bent in such manner as shown in Fig. 2 that its lower end is located at the opposite side of the shell from the lower endof the pickup tube 5 and well below the upper'end of the bottom member ll. Thus when the gas cartridge 56 is opened, the gas will pass therefrom through the socket 52 and passage 4 to the passage ti and then through the boss 62 and tube G l to the bottom of the container for discharge into the interior of the container.

A sealing disk and plug assembly shown in detail in Fig. 9 is secured within the neck 5! of cartridge 58. This assembly includes an annular plug 55 having threads along the upper part of its outer surface for engagement within the tapped inner portion of the cartridge neck 5|, and the inner part of this plug is provided with vertical slits 65 for receiving a suitable Wrench. A thin sealing disk E0 of brass or other suitable material is mounted Within plug 55 between an annular insert H and an annular retainer 72, and these parts are secured Within the plug by spinning over the thin lower end portion of the plug as indicated at 73. The neck of the cartridge is provided with an annular boss 74 against which the retainer l2 seats as shown in Fig. 9, and the disk iii serves to seal the interior of cartridge 50 and is adapted to be ruptured to effect release of the pressure gas for actuating the extinguisher.

A handle 75 serves both as a carrying handle for the fire extinguisher and also as the operating member for efiecting opening of the gas cartridge 55 by rupture of the sealing disk it. The forward end of this handle is pivoted to the head 22 by means of a stud it which is threaded into the head and is connected with the handle by means of a pivot pin Tl supported in a yoke portion 18 at the front of the handle. At the rearward end of the handle is a downwardly extending portion 85 which is received between the channelled outer end 8! of the head extension 53 for guiding the handle in its pivotal movement about the pivot pin 11.

The handle 75 supports a piercing pin 85 for opening the gas cartridge, this pin extending slidably through a bore 86 in the head 22 and into the passage 50 and socket 52 The upper end of the bore 85 is sealed by an O-ring 81 compressed against the bottom of a socket 88 in the upper surface of the head 22 by a retainer nut 89. The upper end of pin 85 is pivoted by a pin 90 in a yoke portion 9| of handle 15, the yoke 91 being slotted at 92 to receive pin 90 and thus to provide for the angular movement of the handle about its pivot Tl with respect to the piercing pin. It will thus be seen that when the handle i5 is moved downwardly about its pivot ll, it will move the piercing pin 35 downwardly to efiect rupture of the sealing disk 10 and release of the contents of cartridge 55 into the passages 50 and El. The retainer 89 and bore 86 guide pin 85 during this movement to maintain it in proper alignment with the neck of cartridge 50 and the sealing disk Hi, and in order to prevent water or dirt from entering around pin 85 when the extinguisher is not in use and possibly causing it to stick, a flexible rubber cover 93 is provided as shown in Figs. 2 and 3, which fits between the head of pin 85 and an annular boss 94 on the head and is compressed like a diaphragm when handle 15 is depressed.

To prevent accidental opening of the cartridge, a locking pin 95 is inserted in matching holes 96 and 9? in the handle portion 80 and channelled portion Bl of the head extension 55, this pin being loosely secured to the head by means of a chain 98 as shown. Also, a wire 99 having its ends sealed together by a readily frangible seal I00 of soft metal or other suitable material may be passed through the head of pin 95 and through the handle 15 and a hole through flat nut 56 to prevent tampering with hand1e'l5 or the gas cartridge, the seal 1 I10 beingi-readily broken when theextinguisher is to beaused. In addition, stops are provided for limiting upward movementof the 'handle about pivot Tl when the locking pin 95 is not in place. Referring to Figs. "5 and fi, the lower end of the handle portion 8.0 is formed with laterallyprojecting ears NH and theinner faces of the channelled .portion 8! of the head is under cut at L92 to provide shoulders which cooperate with ears ill! to form stops limiting upward movement of the handle.

lFig. 2.shows theextinguisher in normal condition ready for use, with the charge of dry chemical .fire extinguishing material indicated at 105. Forexample, a suitable material for use with. this extinguisher is a .powdercomposed primarilyof sodiumbicarb'onate. In order to operatethe extinguisher, the locking pin 95 is first withdrawn, and the handle I5 is then pushed downwardly to-force thelower end of the piercing pin 85 through thesealing disk 10 as shown in Fig.23. Upon the resulting rupture of this disk, the gas within the cartridge 50 will be released through the

passages

60 and 8! to the tube 64, and 'the gas will thus be released at the bottom of the-charge and will percolatexupwardly through the dry materialythus agitating the charge in preparation for discharge. As soon as sufficient gas has reached the top of the shell to create the desired pressure on the charge, which requires only a few seconds, the handle 4| on'the nozzle is operated to pull the valve pin 40 to open position and permit free discharge of the fire extinguishing material. It will be noted that during this operation of the extinguisher, since the gas isreleased from tube 64 at the opposite side of the shell from thelower end of the pickup tube 45, and since both of these tubes extend downwardly to positions well below the upper end of the bottom member ,the latter serves to sealagainst-possible short circuiting of the gas to the-pickup tube and assures full and proper dischargeof substantially the entire contents of the-shell.

The handle canbe readily used for manipulation of the extinguisher as soon as it has been operated toopen the gas cartridge. In addition, theaction of'lifting the extinguisher by thehandle willautomatically effect withdrawal of the lower end of the piercing pinfrom the ruptured sealing disk, thus preventing possible interference by the pin with the free discharge of the pressure gas. As noted, this upward movement of the handle is limited by contact of the ears IOI thereon with the stops I02, and these parts are proportioned to position the handle at the proper level for convenient manipulation of the extinguisher.

After the charge of fire extinguishing material has been exhausted, the extinguisher is readily recharged by first inverting it and holding the nozzle open until all of the gas pressure within is released. The cap 26 for the filling opening 25-'is then removed and a fresh charge 'of fire extinguishing material placed within the shell, and theispentloartridgetll is unscrewed from the head "and replaced with a fresh cartridge. Beforeireplacing the cartridge, the handle 15 should be locked in its upward position by inserting the safety pin 95 in order to prevent the possibility of inadvertent rupture of the sealing disk in the fresh cartridge.

It :will-thus be seen that the present vlIlVGl'lwhich islsimple toconstruct, easy "to an .and refill, and convenient to use. The provision of a head :asdescribed whichicarries all of the operating parts of the extinguisher separately from the shell offers several practical advantages. Construction of .the shell itself is:simplified, and also the same head can be employed r with .1 shells of different capacities, 'the only modification 'required beingto lengthenvtheipickup tube and the as tube within the shell. It has-also beenfound in practice that the extinguisher is. handled with considerably more ease and convenience when the discharge hose is connected with the headof the extinguisher rather than at a lower position on the shell. The simple and convenient arrangement of a single handle for actuating "the extinguisherhas alsobeen found highly advantageousboth-from the standpoint of convenience and also from the standpoint "of assuring rapid and effective operation as a result of the automatic withdrawal of the piercing pin from the neck of the gas cartridge following ruptur of the sealing disk. Since the primary requirement for anyfire extinguisher :is that it operate rapidly and effectively, and also that it bereadily handled during use, it will be seen that all of these several featurescontribute to accomplishment of the primary purposes of the extinguisher.

While the form of apparatus herein described constitutes a preferred embodiment of'theinvention, it is to be understood that the inventionis not'limited to this precise form- 0f apparatus, and that changes maybe made thereinwithout departing from the scope of the invention "which is defined in the appended claims.

What is claimed is:

1. A fire extinguishera-dapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed -gas,comprising a shell forming a container for said charge, a head secured to the upper end of said shell, means forming a discharge outlet through saidhead from said container, a pickup tube for said discharge outlet secured to said head and extending downwardly therefrom within said container to the lower end of said shell, means on said head outside said shell for detachably supporting said cartridge providing for removal and replacement of said cartridge from outside said container without removing said head from said shell, means forming a passageway within said head for conducting gas from said cartridge to the interior of said container, means on said head for effecting opening of said cartridge to release said gas into said passageway, and a tube secured to said head in communication with said passageway and extending downwardly within said container to the lower end of said shell for conducting said gas from said cartridge to the bottomportion of said charge within said shell.

2. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a. cartridge of compressed gas, comprising a shell forming a container for said charge, a head for the upper end of said shell, means forming a discharge outlet through said head from said container, a pickup tube for said discharge outlet secured to said head and extending-downwardly therefrom within said container to the lower end of said shell, means on said head outside said shell for supporting said cartridge providing for removaland replacement -of said cartridge from outside .said -.container" without removing said head from said shell, means forming a passageway within said head for conducting gas from said cartridge to the interior of said container, means on said head for effecting opening of said cartridge to release said gas Within said passageway, a tube secured to said head in communication with said passageway and extending downwardly within saidconta-iner to the lower end of said shell for conducting said gas from said cartridge to the bottom portion of said charge, and means for releasably securing said head to said shell to provide for removal of said head and said tubes and cartridge as a unit from said shell.

3. A fire extinguisher adaptedfor use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charge, a head for the upper end of said shell, means forming a discharge outlet through said head from said container, a pickup tube for said discharge outlet secured to said head and extending downwardly therefrom within said container to the lower end of said shell, means on said head outside said shell for supporting said cartridge providing for removal and replacement of said cartridge from outside said container without removing said head from said shell, means forming a passageway within said head for conducting gas from said cartridge to the interior of said container, means on said head for effecting opening of said cartridge to release said gas into said passageway, and a tube secured to said head in communication with said passageway and extending downwardly within said container to the lower end of said shell for conducting said gas from said cartridge to the bottom portion of said charge, means for releasably securing said head to said shell to provide for removal of said head and said tubes and cartridge as a unit from said shell, said head having a filling opening therein for recharging said container, and a cap removably secured to said opening to provide for charging said container without removing said head from said shell. 7

4. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charge, a head secured to the upper end of said shell, means forming a discharge outlet through said head from said container, a pickup tube for said discharge outlet secured to said head and extending downwardly therefrom within said container to the lower end of said shell and at one side thereof, means on said head for supporting said cartridge, means on said head for effecting opening of said cartridge to release said gas within said container, and a tube secured to said head in communication with said cartridge and extending downwardly within said container to a position at the lower end of said shell adjacent the opposite side of said shell from the lower end of said pickup tube for conducting said gas from said cartridge to the bottom portion of said charge at a position spaced from the lower end of said pickup tube.

5. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a generally cylindrical shell forming the container for said charge, an inverted bowl shaped member secured within the lower end of said shell to form the bottom of said container and extending upwardly therein, a head secured 8. to the upper end of said shell, a discharge tube secured to said head outwardly of said shell, a pickup tube for said discharge tube secured to said head and extending downwardly therefrom within said container to a position at one side of said shell below the level of the upper end of said bottom, means on said head for supporting said cartridge, means on said head for efiecting opening of said cartridge to release said gas within said container, and a tube secured to said head in communication with said cartridge and extending downwardly within said container to a position below the upper end of said bottom and at the opposite side of said shell from the lower end of said pickup tube for conducting said gas from said cartridge to the bottom portion of said charge with the upper portion of said bottom forming a shield between the discharge end of said gas tube and the pickup end of said pickup tube to prevent direct passage of said gas from said gas tube to said pickup tube.

6. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charge, a head for the upper end of said shell, means forming a discharge outlet through said head from said container, a pickup tube for said discharge tube secured to said head and extending downwardly therefrom within said container to the lower end of said shell, means on said head for supporting said cartridge, means on said head for effecting opening of said cartridge to release said gas within said container, a tube secured to said head in communication with said cartridge and extending downwardly within said container to the lower end of said shell for conducting said gas from said cartridge to the bottom portion of said charge, a reinforcing ring secured within the upper end of said shell, said ring having a plurality of tapped holes therethrough, and a plurality of bolts extending through said head for engagement in said tapped holes to secure said head to said shell and provide for removal of said head with said tubes and cartridge as a unit from said shell.

'7. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container fo said charge, a head secured to the upper end of said shell, means forming a discharge outlet from said container, means on said head outside said shell for supporting said cartridge providing for removal and replacement of said cartridge from outside said container without removing said head from said shell, means forming a passageway within said head for conducting gas from said cartridge to the interior of said container, a tube secured to said head in communication with said passageway and extending downwardly within said container to the lower end of said shell for conducting said gas from said cartridge to the bottom portion of said charge, a handle secured to said head for carrying said extinguisher, and means carried by said head for operation by said handle to open said cartridge and to efiect release of said gas into said passageway and discharge of said charge through said outlet.

8. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charge, a head secured to the upper end of said shell,

means forming a discharge outlet from said container, means on said head for supporting said cartridge, a handle pivoted at one end to said head, means carried by said handle for effecting opening of said cartridge upon downward movement of said handle about said pivot therefor to eifect release of said gas within said container and discharge of said charge through said outlet, and means limiting upward. movement of said handle about said pivot to provide for supporting said extinguisher by of said handle during discharge of said charge.

9. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charg a head secured to the upper end of said shell, means forming a discharge outlet from said container, means on said head for supporting said cartridge, a handle pivoted one end to said head, a piercing pin carried by handle in position to effect opening of said cartridge upon downward movement of said handle about said pivot therefor to release said gas within said container, said pin being adapted to he withdrawn from said cartridge upon upward movement of said handle about said pivot to assure free discharge of said gas from said cartridge into said container, and cooperating means on said handle and said head for limiting said upward movement of said handle to provide for carrying said extinguisher by means of said handle and directing the discharge thereof.

10. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, compris ing a shell forming a container for said charge, a head secured to the upper end of said shell, means forming a discharge outlet from said container through the front of said head, said head including an extension projecting rearwardly therefrom in overhanging relation with said shell, means on said extension for supporting said cartridge, a handle pivoted at one end to said head and extending rearwardly from said pivot therefor in overhanging relation with said head extension, a piercing pin carried by said handle for effecting opening of said cartridge upon downward movement of said handle about said pivot to release said gas within said container, the rearward end of said head extension including a channelled portion for guiding said movement of said handle, said handle including a portion received within said channel, laterally projecting ears on said handle portion, and means within said channel forming stops for engagement with said ears to limit upward movement of said handle about said pivot, said ears and said stop means being proportioned to provide for sufficient upward movement of said handle to Withdraw said pin from said cartridge for free release of said gas While retaining said handle in position for ready use as a handle for carrying said extinguisher during discharge of said charge.

11. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charge, a head secured to the upper end of said shell, means forming a discharge outlet from said container, means on said head for supporting said cartridge, a handle pivoted at one end to said head, a piercing pin carried by said handle slidable through a portion of said head to effect opening of said cartridge upon downward movement of said handle about said pivot therefor to release said gas within said container, and an annular sealing member receiving said pin therethrough and positioned between said handle and said head to prevent dirt and liquid from access to said pin tending to interfere with operating movement of said pin, said sealing memher being flexible for compression between said handle and head upon downward movement of said handle.

12. A fire extin uisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charge, a head secured to the upper end of said shell, means forming a discharge outlet from said container, means on said head for supporting said cartridge, a handle pivoted at one end to said head, means carried by said handle for efiecting opening of said cartridge upon downward movement of said handle about said pivot therefor to efiect release of said gas within said container and discharge of said charge through said outlet, said handle and said head having holes therethrough adapted to register with each other when said handle is in a raised position thereof, and a removable locking member adapted to be received through said holes to prevent accidental downward movement of said handle and resulting in accidental opening of said cartridge.

13. A fire extinguisher adapted for use with a charge of dry chemical fire extinguishing material and a cartridge of compressed gas, comprising a shell forming a container for said charge, a head secured to the upper end of said shell, means forming a discharge outlet from said container, means on said head for supporting said cartridge, a handle pivoted at one end to said head, means carried by said handle for effecting opening of said cartridge upon downward movement of said handle about said pivot therefor to effect release of said gas within said container and discharge of said charge through said outlet, said handle and said head having holes therethrough adapted to register with each other when said handle is in a raised position thereof, and a sealing member adapted to be received through said locking member and through a portion of said cartridge to prevent tampering with said extinguisher, said sealing member including a readily frangible portion to facilitate removal thereof for operation of said extinguisher.

CHARLES H. SOMERS. SUMNER C. WILLIS.

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

UNITED STATES PATENTS Number Name Date 1,715,347 Badger June 4, 1929 1,866,981 Melgs July 12, 1932 2,385,449 Koehler Sept. 25, 1945 2,501,047 Gustaifson Mar. 21, 1950