US1606443A - Chemical fire extinguisher - Google Patents

Description

Nov. 9 ,1926.

- A. B. PHlsTER CHEMICAL FIRE EXTINGUISHBR 3 Sheets-Sheet 1 Filed Sept. 23, 1921 Nov. 9 1926.

B. PHISTER CHEMICAL FIRE EXTINGUISHER Fil'ed Sept. 23. 1921 {Sheets-5110911322 a .w w m a I 0 o o o 0 1 a 33 owl/2* i 3/ z B 32 ATTOBNZ Nov. 9 1926. 1,606,443

A. B. PHISTER CHEMICAL FIRE EXTINGUISHER jiiled Sept. 23, 1921 3 Sheets-Sheet 5 1 we /09 1%NT v tilt? if.

@TATS ALBERT B. PEISTER, OF FORT THOMAS, KENTUCKY, ASSIGNOR TO THE IRE-TESTER IVIANUFAGTURING COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

CHEMICAL FIRE EXTING-U'IEEI-IER.

Application filed September 23, 1921.

My invention relates to chemical fiIB-GX- tinguishers and has for its object, the isolation of the working parts from the extinguishing liquid whereby corrosion thereof is prevented; further, to avoid leakage of air from the air pressure chamber to the liquid chamber; further to prevent destruction oi the discharge hose by the liquid; and further, to provide a more du able and more conveniently operable construction.

My invention consists in the provision of a chemical tire-extinguisher of ample capacity, yet readily portable and convenient to operate, and which will be more durable and reliable; further, in the construction of the several chambers for containing the liquid and compressed air; further, in means to prevent filling of the liquid chamber to a higher level than required; further, in comhinedly operated fluid and air valves; further, in means whereby the flexible material of the discharge hose is prevented from coming into contact with the liquid; further, in means to retain said hose in position when not in use; further, in air vent means for draining said discharge hose after use; and further, in means whereby injury to pressure indicating devices is prevented.

My invention further consists in the parts, combination and arrangements of parts, and in the details of construction as will hereinafter be more fully described and claimed.

Tn the drawings:

1 is a front elevation of a device having my invention embodied therein;

Fig. 2 is a side elevation;

Fig. 3 is a rear elevation;

Fig. at is a plan view;

5 is a central verticalsection taken on the line 55 of Fig. 4;

Fig. 6 is a section of the valve mechanism taken on the line 66 of Fig. 4:;

ii 7 is a vertical cross section taken in a plane corresponding to the line '4 of Fig. 4:;

Fig. 8 illustrates a portion of the upper head the air discharge valve being shown in horizontal section on the line 88 of Fig. 9 is a vertical section of the air valve taken on the line 9-9 of Fig. 6; and I 10 is a longitudinal sectionof the discharge hose nozzle taken on the line 1010 of Fig.

My invention comprises primarily," an

Serial No. 502,704.

outer chamber in which the extinguish ing liquid is carried, a second chamber 16 arranged concentrically within the outer chamber for carrying air pressure to force the liquid from chamber 15, a pump 17 for building up air pressurejn chamber 16, a shut-off valve 18 in a passage 19 between the pump and the chamber 16, a combinedly operable valve mechanism consisting of an air discharge valve 20 whereby air pressure from chamber 16 is permitted to enter the chamber 15, and a liquiddischarge valve 21 to permit the extinguishing liquid to be discharged through a discharge hose 22 by pressure from chamber 16.

The liquid chamber 15 is formed between an outer cylindrical shell 25 and an intermediate shell 26. The pressure chamber 16 is formed between the intermediate shell 26 and a pump cylinder 27 of the pump 17. The upper end of the shells 25 and 26 are secured in grooves 28 of an upper head 29 by bodies of solder 80. The lower ends of the shells and the pump cylinder are secured in grooves 31 of a lower head 32 by bodies or solder 33. The upper end of the pump cylinder is held in a hole 3% in the upper head 29.

Air pressure is built up in the pressure washer 38 held in place by a nut 39 having threaded connection with the head. Intake openings 40 are located in the upper end of the tubular piston rod, the bore of which forms communication with a piston 41.

Thepiston is formed as by a disk 42 se 1.

cured in the lower end of the piston rod as by soldering and has a threaded nipple 4-3 projecting therefrom, which has a check valve 4% therein so arranged as to admit air below the piston on the upstroke only. A cup washer 45 is confined between a spacing collar 16 received about the nipple and a nut 47 having threaded connection therewith.

The annular flange of the cup washer e:- tends upwardly which acts as a check valve as well as a packing for the piston. The air compressed in the cylinder below the piston on the down stroke isthus enabled to pass into annular space 48 between the piston rod and the pump cylinder. This construction acts in efliect as a two stage pump. A handle 49 is secured to the upper end of the piston rod for conveniently actuating the same.

The passage 19 forms communication between the pressure chamber 16 and the upper end the pump cylinder. A check valve 51 is located in this passage and is so arranged as to permit air from the pump to pass into the pressure chamber but not to pass therefrom. The check valve comprises a ball 52 operable in a ball chamber 53 closed by a screw The shut-oli' valve 18 is located in the passage 19 between the check valve and the entrance to the pressure chamber. This valve comprises a conically pointed stem 55 having threaded connection with a threaded bore 56 interrupting the passage 19. The conical point of the stem coacts with that portion of the passage between the bore 56 and the pressure chamber. To make the stem 55 air-tight a packing 5'? is received in an enlargement or the bore 56 and held therein by a packing nut 58. A handle 59 is secured to the outer end of the stem for manually operating the same.

The outer chamber is adapted to contain a iire-ei-ztinguishing liquid, for instance, carbon tetrachloride. The inner chamber is adapted to carry air under pressure supplied thereto by the pump. This chamber is normally closed from the outer chamber by the air discharge valve 20, and the discharge hose is normally closed oit from the liquid chamber by the liquid discharge valve 21. Air pressure from the inner chamber is adapted to be exerted against the liquid in the outer chamber and in this manner eject the same therefrom through the discharge hose by controlling devices for combinedly operating valves 20 and 21. These controllin devices are so devised that when in case or emergency, a tire is desired to be extinguished, the air pressure from the inner chamber is caused to discharge the extinguishing liquidby manipulating but a single handwheel.

The construction herein illustrated and showing a prefcrredform, comprises a liquid valve body 60 having a valve chamberlil therein, in. which the valve 82 is operable, and an air valve bcdy'62 having a valve chamber 63 in which the valve 6a is operable. prefer to form the valve bodies 60 and 62 integral with the upper head 29 as a single casting, and so dispose the same as to have the valve body (30 directly over the liquid chamber, and the valve body 62 partly over the liquid chamber and partly over the air pressure chamber. The valve bodies are also arranged in axial alignment with each other. The air valve 20 comprises a conical end (i l on a stem 65 which is integrally formed with an integrally threaded socket 66. The socket has a flat bottom surface 67 adapted to coact with a bearing surface 68 on the head which causes the stem 65 to have a reciprocal movement in a stufiing box 69 in the valve body 62. A slanting passage 70 connects the valve chamber 63 with the liquid chamber. A horizontal passage 71 in axial alignment with the valve stem leads from thevalve chamber and has connection by a slanting passage 72 with the compressed air chamber 16. The conical end oi oi the stem 65 coacts with a seat 78 on the wall of the passage at its entrance to the valve chamber to either conline the compressed air in the chamber 16 or permit the same to enter the liquid chamber 15.

The socket 66 has threaded connection 76 for the inner end of a valve shaft 7? carried for both rotary and endwise movement in a stuliing box 7 8 in the inner end of the valve chamber 61, and a stuiling box 79 in closure cap 80 closing the outer end of the said valve chamber and having threaded connection 81 therewith. The valve 21 comprises a disk 82 preferably loosely held about the valve shaft, between a shoulder 83 and a collar 8 t held in place by pin 85. The disk 82 coacts with a valve seat 86 on a removable seat member 8? held against a shoulder 88 in the valve chamber 61 by the closure cap 80. The seat has a hole 89 therein of substantially larger diameter than the collar 84 in order that the liquid may pass when the valve is open. I prefer to taco the valve disk with a comparatively soft non-corrodible metal, such as a mixture of tin and lead, as shown at S. in order that the valve may at all times be perfectly tight when closed. The projecting portion of the valve shaft is polygonal in form, as shown at 91, and further has a threaded end 92 thereon. A hand wheel having a bore of like :lorm is received over the polygonal portion or" the shaft and is held in place by a nut St on the threaded end.

The valve shaft 77, and the socket 60 with. the stem 65 thereon form a free floating era pansible and contractible member. When the hand wheel is rotated in one direction, the valves 64c and 82 are forced to their seats. In this position should the valve disk cling tightly to its seat when the hand wheel is turned in the other direction, the entire contracting action would be confined to the air valve. I therefore provide a stop screw 95 so positioned as to limit the movement of the socket 66, which causes the same to act as a stationary nut for the valve shaft, and thereby force the disk away from its seat. In similar manner should the air valve stick in its seat the valve shaft will move endwise until the disk 82 strikes the st-ufing box 78, after which it acts as a rotatable screw, which in turn pulls the air valve from its seat.

In order t0 properly convey the liquid to tit) eoaeae manner as to connect with the valve chamher. This stand pipe extends very nearly to the bottom of the liquid chamber. In this manner when air pressure is applied to the top of the liquid, the same will rise in the stand pipe and enter the valve chamber and be discharged thereby enabling the liquid chamber to be entirely emptied.

To properly direct the extinguishing liquid the flexible discharge hose 22 is attached to the valve chamber by a nipple 102 having threaded connection with the valve body 60. The nipple is of sufiicient length to cxtend through a hole 103 in the removable valve seat member which holds the same in place. A gasket 10st is received between the nipple and the valve body in order to prevent leakage. I prefer to so construct the hose as to prevent the extinguishing liquid coming into contact with the rubber portions thereof. Therefore, a non-corrodible flexible metallic tubing 106 is inserted in a rubber hose or sheath 107 consisting of layers of rubber impregnated fabric. One end of the flexible metallic tubing is received in a counter bore 103 of the nipple, which has a groove 109 therein to hold the rubber hose in place. The inner end of the hose and the nipple are effectively held together by a clamp ferrule 110. The outer end of the hose has a nozzle 111 thereon which com- )rises a nozzle ti) 112 havin a reduced till shank 113, which has a groove 11st therein to hold the rubber hose in place. The reduced shank has a counter bore 115 therein, in which the other end of the flexible metallic tubing is received. The outer end of the hose is iirmly'clamped about the reduced shank of the nozzle by a clamp ferrule 116. The nozzle is preferably formed of non-corrodihle metal, such as lead or tin and therefore does not deteriorate.

Filling means are provided whereby the fluid may be placed in the outer compartment. Thus, a filling i'nouth is formed in the upper head which has an opening 121 therein, the upper end of which is threaded to receive a closure plug 122 having a poly onal head 123 thereon for conveniently turning the same. The lower end of the opening has a short tube 124 secured therein by soldering, in order that when the liquie. is poured into chamber 15'an air space is formed to allow for the expansion of the liouid, which expands somewhat with in crease of temperature. A gasket 125 isreeeived between the polygonal head and. the upper end ofthe mouth.

Means are provided whereby the hose may Le drainedv automatically after the device has been used: to extinguish, a fire. Thus a ventpassege 128 in the wall of. the mouth communicates with. the valve chamber by means of a hole 129 in: the removable seat member 87, thus permitting the hose to antomatically drain when the filler cap is removed. 1

I prefer to provide a hose retaining means indicated at 131, in order that the hose may be held when the extinguisher is not in use. This retaining device comprises an open side socket 132 integrally formed with the upper head as by an overhanging hook 133. This hook preferably overhan s the socket in such manner as to form an entrance thereto slight ly smaller than the diameter of the hose. The hose may be placed in the socket by forcing the same past the overhanging hook, the rubber layers of the hose acting as a resilient body readily contracting under outside pressure and afterwards expanding when entirely in the socket. In this manner the hose is prevented from swinging and flying about and becoming worn when the extiir guisher is not in use.

A pressure indicating gage 135 is mountedon the upper head 29 and has tubular connection with the compressed air chamber. The mechanism of these gages is neces sarily delicate and finely adjusted, more over they are equipped with glass fronts which may be accidentally broken. To properly protect this pressure gage a semi-circular hood 136 is secured to the upper head as by forming lugs 137 thereon through which screws 138 pass and are threaded into the upper head The hood furtherhas a reinforcing rib 139 thereon received behind the gage which provides additional protection therefor. In this manner the gage cannot be injured should it be inadvertently struck when the extinguisher is in use.

To carry the device I provide a U-shaped handle 140, the vertical tangs 14.1 of which have their lower ends threaded and received through projecting lugs 142 on the head 29. The handle, is held in place by nuts 1 1-3 hav ing threaded connection with the tangs 141. To charge the extinguisher carbon tetrachloride or similar f .re-extinguishing liquid is poured into the outer chamber through the mouth 120 after first removing the plug 122. The fluid enters the chamber through the short tube 124 until the level of the liquid reaches the bottom thereof. An air pocket 1441 is thus formed, thereby preventing the chamber from being entirely filled. Vi e will assume that the air discharge valve 20 and the liquid discharge valve 21 are closed, the operation and function of which will belater described. The air shutoff valve 18 is opened by turning the handle 59. This opens the passage 13 between the pump 17 and the compressed air chamber 16. The operator stands with his feet on the flange at the bottomthus holding the machine while he operates the pump. The pump is now actuated by the handle +19: w iich draws 1. Leoaeas in air through the openings 40 into the hollow piston rod of the pump. On the up stroke this air is sucked in and enters the c3. 'inder 2? below the piston 41, through the check valve 4-511. On the down stroke the air previously taken in through the check valve and which is now below the piston is compressed and flows past the cup washer 15 into the annular space L8 about the piston rod. (in the next upwarc stroke this partly compressed air is now forced through the passage 19 and past the check valve 51 into the con'ipre"secl air chamber 16. The pijunping action continued until approximately one hundred pounds pressure is built up in the compression chamber. The check valve 51 prevents pressure from escaping by way of the pump. The shut oil' valve 18 is new ClOTIEtl which effectively confines this pres iu'e within the chamber.

become necessary to employ the extinguisher to put out a lire, the hand wheel 93 is n'ianipijilat-ed which combinedly oaens valves 20 and 21 by the contracting action of the valve shaft 7'? and threaded socket 66. This permits compressed air from the chamber 16 to er-tert pressure on top of the liquid in the clan'iber 15, enterin by way oli passage TO, valve chan'iber 63, passage fl, and

passage '52. The pressure on the liquid forces the same upthe stand pipe 100 into the valve chamber 61 and out through the hose 22 and the nozzle 111, the same caus ing a high velocity to be imparted to the stream of liquid.

fitter the liquid has been exhausted and it is necessary to again recharge the device, the plug 122 is removed from the mouth which permits any liquid that may be re tained in the hose to be drained out through the nozzle by breaking the vacuum in the valve (fl'llllillJQl' by uncovering the vent passage 12S.

will be observed that no working parts are normally in contact with the extinguishing liquid, which feature adds long lite-and durability to the device. "When pressure is once pumped up in the pressure chamber there is no chance for the same to escape by leaking through the check valve or pump, as the passage may be effectively closed by the shut-oil valve 18.

My improved extinguisher is of lightweight and sturdy construction, and simple to operate, it only being necessary to mainipulate one hanowheel to bring the device into action. Owing to my improved construction of combinedly operated valves, the device is absolutely certain in its operation, sticking oi the va ves being entirely avoided. By t 1e same means absolute closing 01"- the valves assured and will at all times remain closed unl ss the handwheel is manipulated.

Vhat 1 claim as new and desire to secure by Letters Patent is:

1. In a lire extinguisher, a liquid chamber adapted to be sunohed with liquid, an air chamber, means for charging said alr cham- "ber with compressed gas, a needle valve for controlling the passage of compressed gas from said air chamber into said liquid chamber whereby said liquid is forced therefrom, and means operatively connected with said needle valve to control the discharge of liquid from said liquid chamber, common operating means for said needle valve and said liquid control means, the operative connection between said needle valve and said liquid control means being so constructed that upon actuation of said common operating means said needle valve and liquid consaid liquid chamber to cause the liquid t be expelled therefrom.

3. in a fire-extinguisher, a liquid chamber, an air chamber, a pumping means for building up pressure in said air chamber, a disk valve having tubular connection with the lower end of said liquid chamber, a clirective discharge means having tubular connection with said valve, a needle valve having tubular connection with said air chamber and said liquid chamber, a mechanical connection between said disk valve and said needle valve capable of expansion and contraction for causing movement of said valves-in opposite direction from and toward each other, and manual actuating means attached to said mechanical connection whereby said valves are combinedly closed and combinedly opened.

4-,. In a fire-extinguisher, a liquid chamber, an air chamber, pumping means to build up air pressure in said air chamber, avalve body mounted partly over said liquid chamber and partly over said air chamber and having valve chamber therein, a passage connect ing said air chamber and said valve chamber, a second passage connecting said valve chamber and said liquid chamber, a stem movable endwise having a conical end thereon adapted to coact with one of said passages to form an air valve, a second valve body mounted over said liquid chamber having avalve chamber therein, a tube connecting said last named valve chamber with the lower part of said liquid'chamber, a valve shaft mountedifor reciprocal and rolllll tary movement in said last named valve chamber, a valve disk carried on said valve shaft within said last named valve chamber, a valve at in said last named valve chamber to coact with said valve disk to form a liq- 1 uid valve, said valve shaft having screw connection with said valve stem, and manual actuating means on said valve shaft whereby said screw connection is operated either to cause said valves to approach each other to withdraw from their seats or recede from each other to contact their seats.

5. In a fire-extinguisher, a liquid chamber, an air chamber, pumping means to build up air pressure in said air chamber, a valve body mounted partly over said liquid chamber and partly over said air chamber and having a valve chamber therein, a passage connecting said airchamber and said valve chamber, a second passage connecting said valve chamber and said liquid chamber, a stem movable endwise having a conical end thereon adapted to coast with one of said passages to form an air valve, a secondvalve body mounted over said liquid chamber having a valve chamber therein, a tube connecting said last named valve chamber with the lower part of said liquid chamber, a valve shaft mounted for reciprocal and rotary movement in said last named valve chamber, a valve disk loosely carried on said valve shaft within said last named valve chamber, a valve seat in said last named chamber to coact with said valve disk to form a liquid alve, said valve shaft having screw connection with said valve stem, and manual actuating means on said valve shaft whereby said screw connection is operated either to cause said valves to approach each other to withdraw from their seats or recede from each other to contact their seats.

6. In a fire-extinguisher, a liquid chamher, an air chamber, pumping means for forcing air into said air chamber, an air valve adapted to control the passage of air from said air chamber to said liquidchainher and comprising a valve body, a valve chamber therein, passages connecting re spectively with said air chamber and said valve chamber, and said liquid chamber and saio valve chamber, a valve seat in one of said passages, a conically pointed stem movable endwise and adapted to coact with said seat, a threaded socket integrally formed with said stein, means to hold said socket and stem against rotary motion, limiting means to control the movement of said socket and atom, a liquid valve having tubular conneclion with the lower end of said liquid chamber, a discharge hose secured to said valve and having tubular connection therewith, said *alve con'iprising a valve body, a removable seat therein, a valve shaft mounted for combined rotary and endwise movement in said valve body and passing therethrough, a

valve disk mounted on said valve shaft, a nonecorrosive soft metal facing on said disk adapted to contact said removable seat, means to hold said removable seat in place, said valve shaft having a threaded extension adapted to coact with said threaded socket to cause said valve disk and said conically pointed valve stem to approach each other and open said valves, or to recede frol'h each other to forcibly close said valves, and a hand wheel secured on said valve shaft wherebysaid valves are combinedly opened and combinedly closed.

7. In a lire-extinguisher, an upper headhaving an annular groove therein adjacent its peripher a second annular groove therein located within said first named groove, and a hole therein located within said second named groove, a lower head having an outer annular groove therein adjacent its periphery, an intermediate annular groove therein located within said outer groove, and an inner groove located within said intermediate groove, a cylindrical shell whose upper end is received in said first named groove of said upper head and whose lower end is'received in said outer groove of said lower head, a second cylindrical shell whose upper end is received in said second named groove of said upper head and whose lower end is received in said intermediate groove of said lower head; a third cylindrical shell Whose upper end is received in said hole in said upper head, and whose lower end is received in said inner groove in said lower head, the association of said shells and heads forming in the order named respectively,'a liquid chamber, an air chamber and a pump cylinder arranged within each other, a pumping means in said pump cylinder whereby air pressure is built up in said air chamber, means to convey liquid from the bottom of said liquid chamber, a discharge hose, a liquid valve between said liquid conveying means and said hose, an air passage between said air chan her and said liquid chamber, an air valve in said. passage, a mechanical connection between said air valve and said. liquid valve capable of expansion and contraction and manual actuating means operatively connected with said mechanical connection whereby said valves are opened and closed in opposite directions, a passage between said pump cylinder and said air chamber, a check valve in said passage, and a manually act-uatable valve in said passage between said check valve and said air chamber, whereby said air chamber may be closed from said pump.

8. In a fire-extinguisher, an upper head having an annular groove therein, adjacent its periphery, a second annular groove therein located concentrically within said first named groove, and a hole therein located con-V centrically within said second named groove, alower head having an outer annular groove ill] therein adjacent its periphery, an intermediate annular groove therein located concentrically within said outer groove, and an inner groove located concentrically within said intermediate groove, a cylindrical shell whose upper end 1s received in said first named groove of said upper head and whose lower end is received in said outer groove of said lower head, a second cylindrical shell whose upper end is received in said second named groove of said upper head and whos lower end is received in said intermediate groove of said lower head, a third cylindrical shell whose upper end is received in said hole in said upper head, and whose lower end is received in said inner groove in said lower head, the association of said shells and heads forming in the order named respectively, a liquid chamber, an air chamber and a pump cylinder arranged concentrically within each other, a pumping means in said pump cylinder whereby air pressure is built up in said air chamber, means to convey liquid from the bottom of said liquid chamber, a discharge hose, a liquid valve between said liquid conveying means and said hose, an air passage between said air chamber and said liquid chamber, an air valve in said pa ssage, a mechanical connection between said air valve and said liquid valve capable of expansion and contraction and manual actuating means operatively connected with said mechanical connection whereby said valves are opened and closed in opposite directmns, a passage beween said pump cylinder and said air chamber, a check valve in said passage, and a manually actuatable valve in said passage between said check valve and said air chamber, whereby said air chamber may be closed from said pump.

9. In a fire-extinguisher, a liquid chamber, an air pressure chamber, and a pump cylinder, arranqed about each other in the order named, formed by an association of parts com rising a cylindrical shell. a second cylindrical shell arranged within said first named shell. a third cylindrical shell :11"- rane'ed with n said second named shell. an upper head having a hole therein in which the upper end. of said third named shell is received and a pair of annular grooves therein in which he upper ends of said first and second named shells are received, a lower head having a plurality of annular grooves therein in which the lower ends of said shells are received. a pumping means in said third named shell for building up air pressure in said air chamber. a discharge hose, aliquid dischar e valve having tubular connection with sa d dischar e hose and the lower end of said liquid chamber. an air valve having tubular connection with said air chamber and said liquid chamber. a manually operable mechanical connection between said liquid valve and said air valve so devised as to cause movement of said valves in opposed directions to combinedly open or close said valves, a filling mouth on said upper head over said liquid chamber, a removable closure plug in said filling mouth, and a vent passage in said mouth having tubular con nections with said liquid valve and said discharge hose, adapted to be closed by said closure plug when inserted in said mouth and adapted to be opened to break a vacuum in said liquid valve and allow said hose to drain. when said closure plug is removed from said mouth.

10. In a fire-extinguisher, a liquid chamber, adapted to carry a fire-extinguishing liquid, an air chamber arranged within said liquid chamber, a pumping means arranged within said air chamber, a liquid valve to control the discharge of liquid from said liquid-chamber, an air valve to permit pressure from said air chamber to enter said liquid chamber, means to combinedly operate said valves in opposite axial directions, a filling mouth on said liquid chamber, a re movable closure plug therein, a tubular extension depending :trom said filling mouth into said liquid chamber, wherebyan air pocket is formed over the liquid.

11. In a fire-extinguisher, a liquid chamber, an air chamber, a pumping means to build up pressure in said air chamber, an air valve tubularly connected with said air chamber and said liquid chamber, a discharge hose, a liquid valve tubularly con nected with said discharge hose and said liquid chamber, manual operating means to combinedly actuate said valves in opposite directions, a pressure indicating gage tubularly connected with said air chamber, and a protecting hood mounted on said chamber over said indicatinggage so devised as to permit the indicating face of said indicating gage to be visible.

12. In a fire-extinguisher, a liquid chamber, an air chamber, and a pump cylinder, arranged within each other in the order named, said chambers formed by an association of parts consisting of an upper head, a lower head. a plurality of cylindrical shells, each of said shells being of a diameter different than the remaining shells, each of said heads having a plurality of annular upstanding ribs between which the respective ends of said shells aresecured, an air valve tubularlv connected with said air chamber, and said liquid chamber, a discharge hose, a liquid valve tubularly connected with said discharge hose and said liquid chamber, manually operable means mechanically connecting said valves and so arranged as to open and close said valves by movements in opposite directions, and retaining means for said hose comprising an open side socket in tegrally formed with said upper head, theentrance thereto being smaller than the diameter thereof.

13, In a fire-extinguisher, a liquid chamber, an air chamber, a pumping means for charging said air chamber, an air valve tubularly connected with said air chamber and said liquid chamber, a liquid valve tu bularly connected with the lower end of said liquid chamber, a manually operable mechanical connection between said valves and whereby said valves are actuated 1n opposite directions, a discharge hose compr1sing flexible metallic tubing, and a rubber sheath surrounding said metallic tubing, a discharge nozzle, a reduced extension thereon having a counterbore therein in which one end of said metallic tubing is received, a nipple'having threaded connection with said liquid valve, a reduced extension on said nipple having a counterbore therein in which the other end of said metallic tubing is received, said extensions of said nipple and said nozzle having annular grooves therein, and clamping ferrules received about the ends of said hose to compel the material of said sheath to be forced into said grooves whereby said nipple and nozzle are firmly secured to said hose.

14:. In a fire-extinguisher, an outer cylindrical shell, an intermediate cylindrical shell, and an inner cylindrical shell, arranged concentrically within each other in the order named, an upper head having an annular groove therein adjacent its periphery in which the upper end of said outer shell is received, a second annular groove therein arranged concentrically within said first named groove in which the upper end of said intermediate shell is received, and a hole therein located concentrically with said previously named grooves in which the upper end'of said inner shell is received, a lower head having a plurality of concentric grooves in which the lower ends of said shells are received, the association of shells and heads forming a liquid chamber, an air chamber and a pump cylinder arranged conand the lower end of said liquid chamber,

an air valve'body integrally formed with said upper head and having a valve chamber therein tubularly connected with said air chamber and said liquid chamber, a needle valve operable in said last named valve chamber, a valve sha'ft mounted for recipro-- cal and rotary movement in said liquid valve chamber, a valve disk on said valve shaitt within said liquid valve chamber, a screw connection between said needle valve and said valve shaft, whereby said valves are caused to open when approaching each other and caused to close when receding from each other, manual operating means on said valve shaft, a filling mouth integrally) formed with said head, a closure plug in said mouth, a vent passage in said mouth to cause drainof said hose when said plug is removed, a tube extending downwardly from said fill ing mouth into said liquid chamber whereby an air pocket is formed above the liquid, hose retaining means integrally formed with said head wherein said hose is carried when not in use, a passage in said upper head between said pumping means and said air chamber, a check valve in said passage, and a needle valve in said passage between said check valve and said air chamber.

15. In a fire extinguisher, a supply chamber for extinguishing material, means for in ducing pressure in said chamber, means for controlling the discharge of material from said chamber under induced pressure, and means for controlling said discharging control cooperatively engaging and controlling said pressure inducing means, said pressure inducing means comprising a valve independent of said discharging control means,

ALBERT B. PHISTER,

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