US1832817A - Fire-extinguisher - Google Patents

Description

NOV- 17, 1931 G. T. PEARsoNs FIRE EXTINGUISHER Filed April 19. 1928 Tia-2- TOR Patented Nov. 17, 1931 narra stares GEORGE PEAESONS, OLE' NEW YORK, N. Y.

FIRE-EXTINGUISHER Application fuea April is,

rihis invention relates to lire extinguishers ot the type in Which a fire extinguishing liquid contained in a reservoir is discharged therefrom by a gas pressure generated in the reservoir by the reaction of the admixing of gas generating materials normally maintained in the reservoir; and it is the primary object of the invention to simplityuto improve the general construction of tirel extinguishers ot this type to cheapen the cost of construction and increase the eiiiciency thereof.

A further obj ect of the invention is to provide an extinguisher ot'this type in Which the gas generator is started, or 'they gas generating materials mix, by inverting the extinguisher.

lt is a further object'of the invention to provide an improved generator adapted to be removably mounted in the Yreservoir i whereby the generator may be removed from the reservoir for the purpose of re-charging, cleaning or the substitution of another generator.

It is another objecto the invention to provide an improved gas `generator in which the gas generating materials are normally held in a separated condition and free from the iquid in the tank. Y

lt is another object of the invention to provide new means to hold the gas generating materials, the acid and the alkaliin a separated condition in the generator, in the upright position ot' the extinguisher and to cause them to admix When the chamber is inverted. y

It has been found in this type ot extinguisher that when the extinguisherl is invert ed the reaction of the generating material Within the generator has been so violent that part ot the reacting chemicals have been proliected into the reservoir With the gas pressu e created. The acid it projected trom the reservoir with the fire extinguiShingl liquid Will be detrimental to electrical equipment, delicate fabrics, rugs and other material, therefore, it is a further object of this invention to provide means to exclude the gas generating materials from the reservoir Whe the extinguisher is inverted. Y

Otten times extinguishers of this type are 1923. Serial No. 271,369.

used `on automotive vehicles, motor boats, etc., and are subgect to gar and v1bration. Inasmuch as the outlet ot the generator is always open to reservoir and the re extinguishing liquid in the reservoir is likely to be splashed 55 into the generator in the normal upright position ot the extinguisher, dueto the jar or the vibration or rough handling. Should any ot the tire extinguishing liquid enter the generatingchamber it Would tendto retard 60 the action ofthe gas generating vmaterials When the extinguisher is inverted or itcoming in contact with them ina normal upright position ot the extinguisher might tend to deteriorate one or the other of the gas gen-A t' eraring materials, therefore, itis the further object of this invention toprovide means in the torm of an air bell to exclude 'the' tire extinguishing fluid trom the interior of the generator in the normal upright position of 70 the extinguisher.

In addition to the above it has been found that due to the vibration and jar of the eX- tinguisher that the liquid gas generating material contained in the generator' has been 75 spilled or splashed from its container Which in the case of acid has a deteriorating effect on the metal container in Which it is held. This container it corroded Would tend to leak and allon7 the tire extinguishing liquid' to enter the generator and render thev device in- Voperable under the conditions vaforesaid mentioned, therefore. to overcome this condition it is a further object of this invention to maintain the means for containing the fluid gas generating material always open to the exterior thereof and to provide means to eliminate the splash of the liquid therefrom due to jar orvibration of the extinguishers when carried` on motors, vehicles or otherwise subjected to the aforesaid conditions oi liar and vibrations.

It has been experienced with extinguishers of this type Where gas has been conducted from the seat of the re-acting gas generat' ingmaterials such as soda and acid-by means ot a tube restricted in area that the tube became clogged with the elements of reaction in the form of sodium sulphate. andcould not be easily cleaned, therefore, it is the turther object of this invention to provide means to convey the generated gas from the generator in a gas passage which alliords a spacious area which cannot be clogged, overlooked or neglected and which cannot be obstructed and which will be easy to inspect, clean and afford an always open passage.

In extinguishers of this type it is very necessary that the pressure producing elcments be inspected from time to time. This should be rendered as easy as possible, therefore, in order that the gas generating matcrials in the generator may be inspected with the least possible damage and the greatest ease, it has been arranged to have the generator supported in axial alignment with and near the opening of the extinguisher. Therefore, in order to provide ineaiis to Yliaeilitr-.te inspecting a furthe-r object ot this invention is to provide means for withdrawing the gen erator from the reservoir to afford easy inspection or renewal of generating ma terial.

It has been tound in extinguishers of this type also that certain generating materials contained within the generator are subject to deterioration due to the entrance of the out-side atmosphere into the generator. In order to obviate this condition a seal has been arranged and interposed between the outlet of the generator and the exterior of the extinguisher it being a further object of this invention to provi@ e a new means to exclude outside atmosphere from the genA erator.

It has been found that when bicarbonate 0f soda has been used as one ot the gas generating materials and has stood for a considerable time a skim incrustation forms over the top of it in its container, sometimes delaying the projection ot the soda from its container. therefore, it .has been arranged to obviate this condition by providing a sliding container which when the extinguisher is inverted will tall with an impact thereby projecting the soda or the dry element from its container it being a further object of this invention to provide means to torcibly eject by impact the dry gas generating material from its container when the extinguisher is inverted.

In this particular construction as is shown in the illustration it is necessary that the gas generating material be so positioned that when the extinguisher is inverted the gas generating materials will be projected cogether into the gas generating chamber so that they may admix and create a gas pressure when the extinguisher is inverted. It is also an advantage to have a free movement for the sliding containers. Therefore, it is a further object ot' this invention to provide means for positioning the gas generating material containers in a predeterminzd position in the generator and to maintain them in a predetermined position both in the normal upright and in the inverted position of the reservoir.

In extinguishers of any type it has always been tound to be a detriment to have valves or movable parts which are likely to coi-rode7 stick and become inoperable to close the generator from the lire extinguishing liquid container.

In this particular structure I provide for an always open generator, open troni the gas generating chamber to the exterior thereof: aiiording an always open gas passage tree troni obstruction, Avalves and other impedingl elements and still so constructed as to exclude the outside atmosphere and the tire extinguishing tluid from the generator in the upright position ot the extinguisher, therefore, is the obicct of this invention to provide means comprising an air bell to exclude the outside atmosphere and the lire extinguishing liquid trom the generator in the uprifl it position thereof providing tor an always open gas generator tree from valves.

It has been my experience that the gas generating materials foam up in their reaction to a considerable height in the generaand are carried therefrom by the gas pressure to the exterior of the generator due to a st aightaway gas passage, therelore, in order to obviate such a condition it is a turther object of this invention to pro ride ballies or staggering means in the line ot the chemical reaction and gas flow to baille and stagger the generated gas to render it dry and to maintain the reaction within a limited space and to maintain the generatin materials within the generator :is the soda containers.

This present application is supplenieiitinv in part of my eo-pending apj'ilication, Serial No. 392.224 and :tor further improvements on the generator disclosed b v said application.

Other objects and ad 'antages will utter appear.

In the drawings accompanying and 'torming a part of this specification Figure l a sectional side elevation ot a tire extinguisher illustrating an embodiment my in'iproved chemical gas generator applied thereto.

Figure 2 is a longitudinal sectional view showing a modified form ot the generator illustrated in Figure l.

Similar characters ot reference design hereina te like parts throughout the diliereut views ot the drawings.

In Figure l, ot the drawings7 I have shiny-:n

'nee-amv reservoir having an outlet 4, arranged with la hose 4ta connected thereto. Contained in the reservoir in axial alignment with the opening 2, is a cylinder 5, having a 'solid bottom 5c, thus forming the outer shell of Vthe generator. The bottom end of said cylinder rests on the bottom of tank 1. 'I The other end 6, is open and lies adjacent Athe opening 2, in tank 1, in the normalupright 'position of the extinguisher. This opening 6, constitutes the outlet of the generator. Vithin the cylinder 5, is another cylinder 7, with a smaller outside diameter than the inside diaineter of cylinder 5. This second Cylinder ris solidly connected aiidpattached to an anl nular projection 8, from the reservoir cover 3, thereby forming a solid closure or top for cylinder 7. Cylinder 7 has an open lower end 9, extending` to adjacent the bottom of cylinder 5, in the normal upright position ot the extinguisher and becomes the inlet to the outlet 6. Cylinder 7 being of less outside diameter than the inside diameter of cylinder 5, forms an area or passage 10, between exterior of vcylinder 7 and the interior of cylinder 5, extending between inlet 9 and the outlet 7, thereby forming a spacious pas-V sage between the two cylinders for the gen-- erated gas to pass from inside the cylinder 7 through inlet 9, passage 10, and through outlet 6 to the exterior of the generator. The length of cylinder 5 and cylinder 7 deter mine the length of the gas passage 10. The length of cylinder 7, becomes operative to maintain the gas generating materials in cylinder 7 and exclude them from tank 1, when the tank is inverted. Y

It will be readily seen that the gas passage 1() is of such a character that it can be easily cleaned, inspected and kept free from obstruction. All this can be accomplished by removing one cylinder from the other. Attached to cylinder 7, are lugs or pins 7a to maintain a spaced apart relation between j cylinder 5 and cylinder 7. Within cylinder is a bottle cage ,11, with a spider or disc 12, extending beyond its sides as a projectionV and in alignmentwith cylinder 5, operable to maintain the cage in a predetermined po'- sition. vSaid cage 11, is supported by a rod 18, resting on the base 5a, to elevatevthe cage i and provide a chamber below the base of the cage. Attached to the top of the cage 11. is a rod 1li, extending int-o the onen end of cylinder 7, to a point adjacent the top thereof, the advantage of this rod will later appear. On the end of the rod 14, is a disc or projec tion 15 of the saine diameter or less than the inside diameter of cylinder 7, operable to position the rod centrally of cylinder 7. A receptacle 16, such as a bottle for a gas generating material such as percent sulphuric acid is contained within the bottle cage 11. fi non-splash hollow stopper 17, is placed in the. neck of tie bottle to prevent the splash of the 'fluid gasg'enerat'ing material 'from the reeepta'cli-i.4 The stopper has openings in its top in which tubes 18 are inserted and extend into the hollow vspace of the stopper to act additioi'ial baiiii'ig incluis. Ain opening i9, is in the bott-oni of: the stopper and baiil'es 20, are interposed between the opening 10 in the bottom and the outlet tubes 18 in the toip to retard the splash of the fluid from the recegtacle due to jar and vibration. Slid ably mounted on rod 14:., are containers 21 adapted to hold a gas generating material such as bicarbonate of soda.. Attached to the bottoni ci" each `containcr is a tube 22, slidably mounted. on rod le, with the end of the tube extending' a distance above the top of the container operable when the extinguisheris inverted to permit the container to slide down the tube and strike the bottom with a sharp impact thereby projecting the soda therei from when the extinguisher is inverted and to hold the `container away from the projected soda. thereby permitting the acid that flows from receptacle 16 to Jfreely adinix with the soda to create 'a gas pressure. Said containers also act as a baille to the reacting gas genen ating materials and the iiow of the 'generated gas.

Exterior of cylinder is a cylinder 23, solidly connected and attached to an annular projection from cap 3, thereby forming a solid top or closurefor said cylinder 23. T he 'cylinder 23, extends from cz p 3 into tank 1, to a point below the level of the fire exe tinguishing fluid in the tank thereby forni; ing an air bell over the open end of cylinder 5 and becomes operable to exclude the tire extinguishing liquid in tank 1 and the outside atmosphere from exterior 'tank 1, from the cylinder 5, in the normal upiight position of the extinguisher. Attached `to cylinder 5, is a pin 24, cooperating` with the slot 25 in cylinder 23, thereby forming a bayonet catch Voperable to withdraw the cylinder 5, and its contents from the extinguisher tank 1, when the l,cover 3 is removed therefrom. It is then perfectlyV obvious that tube 5 with its contents can be readily removed from cylinder 23, by releasing the pins 'from the slot 25, and the contents, namely the gas generating inaL terial from tube 5, can be readily withdrawn and inspected. It will be noted that at the top end of cylinder 7 in a normal upright position of the extinguisher the space 26, constitutes a gas generating chamber into which the gas generating materials are projected when the extinguisher is inverted and likewise in space 27 to the bottoni of tubo 5 in a normal upright position ot' the extinguisher also becomes a chamber for the reception el the residue of the gas generating materials when the extinguisher has been 'returned to normal after having been inverted.

In the modification slio'wn in Figure 2, the construction is substantially similar to the iii) construction shown in Figure 1, with the eX- ception that instead of the top of cylinder 7,

being part of the tank cover 3, it has a separate solid top 28, attached thereto is a button or ring Q9, operable to lift the cylinder 7, from cylinder 5. Cylinder 23, instead of having a top formed by the tank cap 3 has a solid separate top 30, with a button or ring 31 attached thereto for withdrawing the entire generator from tank 1, by means ot' pins 2d and a bayonet catch 25. In this modification it will also be noted that the rod 14, and disc 15, are operable to maintain cylinder 'T in a predetermined position with its open end 9, in a spaced apart relation to the bottom 5a of cylinder 5. It is obvious from the illustration in Figure 2, that the generator is a complete unit exclusive of any part of the extinguisher tank or cover.

It is obvious that in assembling the generator that inasmuch as cylinder Q3 and cylinder 7 are solidly attached to cover 3 and the Cil gas generating materials and their containers are removably supported in cylinder 5 that all that is necessary to do is to insert cylinder 5 with the soda and acid and their containers contained within between the two cylinders 7 and 23 and turn the pins on cylinder 5 into the slot or bayonet catch 25 in cylinder 23. All three cylinders and their contents are now maintained by cover 3 and can then be inserted into tank 1, filled with the lire eX- tinguishing liquid and the cover 3 screwed down tight. The'extinguisher is now ready for use in the fire emergency.

Operation In the fire emergency the operation of the device is as follows Turn the extinguisher upside down, the acid contained in receptacle 1G flows through the stopper 17, into the gas generating chamber 2G, the soda containers 21 are projected downward and eject the soda contained therein into the generating chamber QG, where the soda and the acid imite to create a gas pressure which passes upward to the top of' the cylinder 7, to inlet 9, of the gas passage 10, thence through the gas passage 10 between cylinder' 7, and cylinder 5 to the end of cylinder 5 to outlet 6. Then upward outside of cylinder 5 and inside of cylinder Q3 into the reservoir or tank to the top of the lire extinguisher fluid therein, thereby forcing the fluid 1a through the outlet of the reservoir 4:. through the hose 4a on to the fire.

It will be understood that the mechanism herein described may be utilized for expelling from a container fluid of other nature than fire extinguishing fluid, and while I have set forth this particular utility and application of the invention because it is preferred not intending to restrict it to this specific use, but claim the right to all uses to which the subject matter embodied in the several claims may be put.

Having now fully described my invention what I claim as new and desire to secure by Letters Patent is 1. In a lire fighting device, a liquid container having an outlet above the normal liquid level, an opening in said container having a removable cover, a gas generator comprising two cylinders one of the cylinders having a solid bottom and an open top, the second cylinder f less outside diameter than the inside diameter of the first cylinder and so arranged as to provide a passage between the two cylinders, said second cylinder having a solid top and whose lower end eX- tends a substantial distance into said first cylinder and defines a completely open bottom thereinm said second cylinder being disposed in said first cylinder with its open bottom lowermost, gas generating materials in said generator normally held in a separated condition and operable to unite when Athe containers is inverted to create a gas pressure to eject the liquid fiom said container, said gas passage connecting the interior of the generator with the exterior thereof at a point above the level of the liquid in said container in the normal inoperative position of the extinguisher'.

2. A gas generator comprising two cylinders one of the cylinders having a solid bottom and an open top, a second cylinder of less outside diameter than the inside diameter of the first cylinder whereby an open passage is provided therebetween, said second cylinder having a solid top and a bottom whose cross-sectional area is onen contained in the first cylinder at a substantial distance from the open end of the first cylinder with said open bottom lowermost in the normal. position ofthe generator, gas generating materials in said generator normallv held in a separated condition and operable to unite when the generator is inverted to create a gas pressure, said passage extending from the interior of the generator to the exterior thereof and an inlet to the passage within the generator located at a distance from the reacting gas generating materials when the generator is inverted and when said generator is returned to its normal position after having been inverted to exclude the gas generating materials from the exterior of the generator.

3. A gas generator comprising two cylinders one of the cylinders having a solid bottom and an open top, a second cylinder of less outside diameter than the inside diame ter or" the first cylinder whereby an open passage is provided therebetween, said second cylinder having a solid top and a completely open bottom contained in the first cylinder at a substantial distance from the open end of the first cylinder with its open bottom lowermost in the normal position of the generator, gas generating materials in said generator normally held in a separated condition and operable to unite when the generaf tor is inverted to create a gas pressure,said

passage extending from the interior of the generator lto the exterior tliereotl and means to maintain the second cylinder in spaced apart relation to the first cylinder and pro-V vide a space between the open lower end ot' the second cylinder and the base of the Iirst cylinder.

sage between the tivo cylinders, said second Acylinder having a solidtopand Whose lower end extends a substantial distance into said first cylinderand defines a completely open bottom therein, 'said second cylinder being disposed. in said iirst cylinder With its open bottom lovvermost in the normal position ot the generator, gas generating materials in said generator normally held in a separated con'- dition and operable to .unite vtocreate pressure to eject the liquid fromthe container When the container is inverted, said passage connecting the interior of the generator to the exterior thereof and means to exclude the fire extinguishing liquid from the generator when the container is upright or subjected to movement.

5. In a firefighting device in. combination a` container for a ire extinguishingliquid having an outlet, an opening in said contain-` er and a closure therefor, a gas generator in said container, gas generating means in said generator arranged to create pressure to expel the fire extinguishing liquid from the container, an open passage from the interior of Y the generator to the exterior thereof, and means to exclude the iireextinguishing liquid from the passage when the container is subjected to movement or jar. l

6. Iii a- `ire fighting ,device a liquid coiitainery for fire extinguishiiigrliquid having Van outlet above the liquid level,` a gas generator in said container comprising a cylinder having a solidV bottom and openjtop,van openended second cylinder having `a closed top with the closed top uppermost contained in said first cylinder, a passage between thetwo cylinders opening into the container and Van inlet to said passage so positioned Withinathegenerator as to be above the seat of reaction of the gas generating materials in said' generator When the container is inverted.

7. In a fire iigliting device a liquid con `having an opening into thecontainer, gas

generating means in said generator operable to create pressure to expel the liquid frein the container whenthe container,` is inverted` and means comprising an air bell to exclude the tire extinguishing iiquidfromthe interior of the generator' in tlie normal upright position oi" the, container or when the container is subjected to movement in or ironiit-s uprigiitposition.I v

ti. In a lire lighting device in combination a liquid Vcontainer iireextingiiisling liqf nid, a gas generator lin said Acontainer haviiigaii always open outlet into said container and means to exclude the tire extinguishing liquid from the interior o ttlie. generator when the container is subjectedto movement or jar from or in its upright position.

t). in a lire tigliting devicein combination a tank for a tire extinguishing liquigha gas generator supported in said tankcomprising a casing having 4a solid base, and open top,- gas generating materials Withinhsaidcasing:

arranged to unite to create pressure when the generatoris inverted, a second casing having aV closed top and Whose lov'ver limitsdejline an opening inserted top uppermost into the first casing with its lower limits disposed centrally of the iirst casing and so positioned and arranged that the gas generating materials Will be projected tnreinto, adm ix'. and will not pass therefrom When the tank is inveited.V

l10. A gas generator comprising atiibiilar casing having a solid base and an opentop, gas generatingniaterials in said casing held in a separated condition andarrangedjo uniteto create pressure when the generator is inverted, a second tubular casing having a vsolidtop and `Whose lower limitsdeiines 4,

casing havin@v a solid base and an o ento t: t: l l 7 gas generating materials' in said casing held in `a separated condition and arranged A to imite toereate pressure when the generator is inverted, a second tubularcasing having- .a solid top and ivhoseloiver limits Adefinesan o Jenin@ contained to `u a ieimost in said first l D i l l Y i l casing, means' tofni'aintain the open end of.

with the closed end of the .tiiistcasingz l2, Ina gas generator, a multiplicityof receptacles, gas generating .materials'held in a separated condition in said receptacles and arranged to unite to create pressure when the generatoris inverted and' means operable and so arranged as to successively pro- .,tlie second casing in spaced apart relation vide impacts to the receptacles, when the generator is inverted, to project the contents from the receptacles..

13. In a tire lighting .device altankhaving an outlet to containa fire extinguishing iso,

liquid, an opening in said tank having a removable cover, a gas generator containing gas generating materials held in a separated condition and arranged to unite to create pressure when the tank is inverted to project the liquid therefrom contained in said tank comprising a cylinder having a solid base and an open top said top being positioned adjacent the opening in said tank, a second cylinder of less outside diameter than the inside diameter ot' the lirst cylinder attached to'the cover of the tank with its open end arranged to be inserted into the open end or the first cylinder to provide means to exclude 5 the gas generating materials from the exterior of the generator when the tank is inverted. i i

14. In a fire ghting device, a tank for `fire extinguishing Vtluid having an opening and a closure theretor and an outlet above the normal liquid level ot the fluid in the tank, a gas generator having an always open outlet above the normal liquid level in said tank containing generating materials held in aseparated condition and operable to create a gas pressure to expel the tire extinguishing lluid from the tank when the device is inverted and means in said tank to exclude the atmosphere outside the generator from the interior of said generator in the upright position of the tank.

15. A gas generator comprising a cylinder with a solid bottom and an open top, a n second cylinder having a closed top and whose lower end extends a substantial distance into the said liist cylinder and delines a completely open bottom therein, said second cylinder being disposed in said lirst cylinder H4 with its closed top uppermost in the normal upright position of the generator, said cylinders being of dili'erent diameters whereby a passage is formed therebetween; gas generating materials held in a separated condition and operable to imite to create pressure when 5 the generator is inverted contained within the tirst cylinder and so positioned and arranged as to be projected into and admix in the second cylinder when the generator is inverted to create a gas pressure.

0 16. 1n a lire extinguisher in combination a tank for lire extinguishing agent, having an opening and a closure therelfor and outlet therefrom, a gas generator in said tank comg prising a cylinder with a solid bottom and an open top, a second cylinder having a closed top and an open bottom contained in the lirst cylinder with its closed top uppermost in the normal upright position of the generator, gas

. p generating materials held in a separated con- 0 dition and so positioned and arranged as to be projected into and adinix in the second cylindei' when the extinguisher is inverted to create a gas pressure contained within the n lirst cylinder and means to exclude the lire 6'5 extinguishing agent from the interior of the Legaal? generator when the tank is subjected to movement, or vibiation from or in its normal upright position.

l'l. 1n a lire extinguisher in combination a tank for lire extinguishing agent having an opening and a closure therefor and an outlet tnei-eirom, a gas generator in said tank comprising a cylinder with a solid bottom and an open top, a second cylinder having a closed top and an open bottom contained in the lirst cylinder with its closed top uppermost in the normal upright position or the generator, gas generating materiais held in a separated condition and operable to unite to create pressure when the generator' is Yinverted contained within the iirst cylinder and so positioned and arranged as to be projected into and admix in the second cylinder when the generator is inverted to create a gas pressure and means comprising an air beii to exclude the lire extinguishing agent from the generator v-:iien the tank is subjected to movement.

18. A gas generator comprising a cylinder with a solid bottom and an open top, a second cylinder ot less outside diameter than the inside diameter of the lirst cylinder whereby to provide a space therebetween, said second cylinder being closed at the top and whose lower end extends a substantial distance into the iirst cyiiiider and dennes a completely open bottoni therein, said second cylinder being disposed in the said lirst cylinder, gas generating materials contained in said generator held in a separated condition and arranged to unite to create pressure when the generator is inverted, and means in said generator to baille tlie reacting` chemicals and generated gas when the generator is inverted to exclude the gas generating materials troni the exterior ot the generator.

19. ln a lire lighting device a tank with an outlet containing a lire extinguishing liq` uid having an opening and a closure therefor, a gas generator in said tank comprising a cylinder having a closed base and an open top end, a second cylinder having a closed top and whose lower end delines an open bottom contained open end downward in the tirst cylinder and so arranged as to provide a space between the two cylinders, a third cylinder with a solid top and an open bottom coveringl the open end of the lirst cylinder, said third cylinder having a portion in spaced relation to said lirst cylinder and extending a substantial distance below the open top of said iii-st cylinder and below the level of the lire extinguishing liquid and means to withdraw the generator from the tank as and for the purpose specilied.

20. In a lire lighting device in combination a tank having an outlet to Contain a lire extinguishing liquid, an opening in said tank having a removable cover, an open gas generator containing gas generating materials operable to create pressure when the tank is llii inverted contained in said tank and .means connected to the cover of the tank to exclude the re extinguishing liquid from the generator when the tank is subjected to movement in or from its upright position.

21. In a gas generator, a receptacle to hold a Vgas generating liquid, a multiplicity of loosely mounted containers to hold other gas generating materials, said containers disposed for relative longitudinal movement in the generator to provide upon inversion an impact for said containers te eject the contents thereof, said containers being formed to provide different layers of the gas generating material te facilitate the reaction of the chemicals when the generator is inverted.

22. A gas generating unit comprising a receptacle having a constantly vopen outlet therein adapted to be placed in a liquid carrying container and operable on inversion to create a pressure and means associated with said outlet operable to exclude the liquid from the interior of said receptacle and maintain the outlet always open.

23. In a dre lighting device the combination of a tank having an outlet, a generator disposed therein and .adapted to generate pressure upon inversion of said tank and means associated with said generator extending a substantial distance above the tank outlet for conducting the pressure upon inversion at substantially all points about the generator to a substantial distance above the tank outlet and toward the then liquid level of the said tank. A

2A. In a fire fighting device the combination of a tank having an outlet, a generator disposed therein adapted to generate pressure upon inversion of said tank, and annular means associated with said generator extending a substantial distance above the tank Outlet and spaced therefrom for conducting said pressure upon inversion in an annular current to above the tank outlet and towards the then liquid level of said tank.

25. A stopper for a liquid carrying receptacle, an always open passage through said stopper' and battling means in said stopper in the line of said passage to prevent passage of liquid therethrough when the receptacle is subject to or shaking.

26. A stopper for a liquid carrying receptacle having an always open passage therethrough and means in the line of said passage operable to exclude passage of liquid therethrough when the receptacle is subject to jar or shaking.

27. A gas generator comprising two cylinders, one of the cylinders having a solid bottom and an open top and a second cylinder having a solid top and whose lower end defines an open bottom contained in the first cylinder with its open bottoni lowermost in the normal position of the generator; gas generating materials in said generator normally held in a separated condition operable to unite when the generator is inverted to create a gas pressure; an annular passage from the interior of the generator to the eX- terior; and inlet means therefor remote from the seat of the reaction of the gas generating materials when the generator is inverted.

28. A gas generator comprising two cyl- ,inders, one ot' the cylinders having a solid bottom and an open top and a second cylinder having a solid top and whose lower end defines-an open bottom contained in the lirst cylinder with its open bottom lowermost in the normal position of the generator; the lower end of said second cylinder extending a substantial distance into the first cylinder; gas generating materials in said generator normally held in a separated condition operable to unite when the generator is inverted to create a gas pressure; and an annular passage from the interior to the exterior of the generator, said passage having an outlet immersed in the liquid of the container when in the inverted and in the normal position.

29. A gas generator comprising two cylinders, one of the cylinders having a solid bottom .and an open top and a second cylinder having a sclid top and whose lower end delines an open bottom contained in the first cylinder with its open bottom lowermost in the normal position of the generator; the lower end of said second cylinder extending a substantial distance into the first cylinder; gas generating materials in said generator normally held in a separated condition operable to unite when the generator is inverted to create a gas pressure; said cylinders being spaced concentrically for defining a passageway from the interior of the generator to conduct the generated gas therefrom when the generator is inverted.

30. In a tire ghting device the combination of a tank having an outlet, a generator having an opening disposed therein and adapted to generate pressure upon inversion of said tank and bell-shaped means associated with the opening of said generator extending a substantial distance above the tank outlet for conducting the pressure upon inversion at substantially all points about the generatorto a substantial distance above the tank outlet and toward the then liquid level of the said tank.

Dated April 12, 1928.

, GEO. T. PEARSONS.

Images