US2610692A - Fire extinguisher - Google Patents

Description

Sept. 16, 1952 E. E. sEABERG 2,610,692

FIRE EXTINGUISHER l Filed Dec. 3, 1948 2 s. T l

Z Z Z L L50 0 f INVENTOR.

iff/VEST E, SEABERG c??? I YQM//r /i T TOFNE YS Patented Sept. i6,

UNITED STATES PATENT rOFFICE lafsioxsaa n f.

`lilil':iii:irrINGi'J''Isiiiiit Y Ernest ,Scabergz yrooklyi1,-N. Ys assigner 1.0 `Carnoy Products Corporation, VEln1sford,--N. Y.; Aal corporation of New York Y c l Y LLAmilisue-noienter s, 194s; 'sriai No. oaiztt be obvious osi-errors, orinar te ylearned Vbis' trae;A f

tice with the-invention, Ythe 'saine being 'real-ized 'and attained by means of `'the rinstr-urrientalities and conibi'natio'nsA pointed `obit/in lthe appended claiins. K i he invention-consists inthe novelparts,` constr ctions, arrangements,combinations and 'lnyexr'ients herein shown 'and described. p y The 'accompanying drawings, refrred'tohere# in and constituting a part hereof; illustrate one 'err'iboc'liment of the invention, land together with 'the descriptum, 'serve to vexplain 'the vprinci-ples of the invention.

jOf lthe drawings: n I

Figure 1 is a vertical section shfinlg* atypical and preferred einbodiinent of ythe invention; 4 H fliig'ure 2 is a :fragmentary side elevation and Fig "re "3 is vla top planvew' fof the embodiment 'of Figure 1; y

Figure 4' is a detailed *sectional view taken on the line 4-4 of Figure 1v;

Figure 5 is a botto'rn'plan View of the parts `'shovlfn in Figure 4; and A' Figure 6 is a detailed front Aelevation of the nozzle shown in Figure l, y

The present inventionhas for its objects the provision of a highly efficient, compact, `LI`sifrrple and relatively inexpensivegaspropelled drypowder fire extinguisher. A 'further object 'is the provision 'of a 'novel Vand liiriprovec'i 're'extingu'i'rsher "which will 'extinguish large 'fires with a sinaller 'amount of powderfaiid gas y"than Jhas heretofore been generally possible. Still 'another object is the provision'ofan 4extiguisherwhich is eiective at unusually long ranges. The invention further provides a gas-propelled, dry-powder extinguisher which can be refilled with a minimum of labor and which can be sealed with certainty.

As illustratively shown in the accompanying drawings the extinguisher of the present invention comprises a gas bottle to contain propellant gas under high pressure, an exterior bottle into which the gas is released and which is iilled with powder to be propelled by the gas through a nozzle controlled by a hand valve. Manually opened valve means are provided for releasing the gas from the high pressure bottle, and special sealing means are provided for mounting the inner bottle and its valve within the outer powder-filling bottle.

sllv'vn,v theoiite'rrbottle TH) fcomp'riseswa .genL verally vcylindrical `steel container having dome rlilce ends which 'are' interiorly apertured "and threaded 'to receive the nozzleportion; andthe llang'eof an interior gas bt'tl'e.

At one rend,` 1.2,1tliebottle l0 is thicken and Iinteri'o'rly tlneadedto receive "the nozzle anddischarge valve assembly. This comprises 'affstron 'metal neck -Il 4 v.havingfafgfradually constrict'ei land curved interiorv passage 'with-ich leads to afvalt/ and '."dis'eharge nozzle. vThe -lneckli's exterior-ly threaded ltof'fitV tightly by ftlireads IIB irft-he bottle and is sealed thereto by gasket 72b. .The "valve means :comprises cylindrical 'plug-22 slida'bl'e fa cylindrical ibore lform'e'd in `Ath neck `'casting and urged toyfl'osirrguposition bv means ofiafcoi-l spring 2i compressed :between .eiid of lthe Plug 2'2 ris forme-i with annular v`groove1-2-8 which -iiiay coincide with fthe vpassage r6 sofas to provide 'for discharge through tlievalve. Plug :22 is sealed iii vvbore 'by imeans,lofthe'trom-1 Oerings which-are seatedlin annular grooves- #at either side O'f 'the groove" y28.

A Groove 2s aridi tuerfxiozzie which ytate s'u'' 11a-'rigor shown 'in by axial movement of plug 22, a yoke 33 is fasy tened to the lower end of plug 22 and is formed with slots 35 which receive the rounded ends of a loop shaped lever 31 pivote'd at 38 on a pin extending through the neck casting I4. Stops 39v formed integrally with casting i4 limit movement of the lever 31 by spring 24. When lever 31 is manually' depressed, the valve plug 22 isvmoved to open or discharge position.

The interior or high pressure gas bottle comprises a standard small steel bottle 40 for containing high pressure carbon dioxide or nitrogen under a pressure of 1000 to 2500 pounds per square inch pressure. Bottle 40 is threaded at one end to receive a valve 42 of standard construction which is opened by relative rotation of the valve stem by means of the winged linger disc 44. Disc 44 is mounted on the valve spindle 46 with a small amount of play and may be sealed" to the valve body by means of pin 48 which projects through an aperture in the disc and into a hole 50 in the flange 5l fixed to the valve body 42.

When pin 48 is in place it is usually sealed by means of a Wire seal 52 passed through the loop of pin 48 and apertures in lugs 54 on the flange. When the extinguisher is to be used, the pin 4B may be pulled by breaking the sealing wire 52 thereby allowing the finger disc 44 to be turned to open the valve, causing the high pressure gas to be discharged into bottle l and readying the extinguisher for use under control of the nozzle valve actuating lever 3l.

Figure 4 shows the details of the illustrative valve assembly. As embodied the valve body 42 is threaded into the neck of bottle 40. Valve body 42 is formed with a discharge passage 65 leading from the bottle 40 to the side of the body 42 and including a valve seat 56 to be closed by the valve gasket 58 carried by threaded member 60 which is keyed to the valve spindle 46 so as to be moved to open and closed position by disc 44.

Bottle 40 is securely mounted in the bottle I0 by means of flange 5| which is stepped to provide a circular lip 6l which is received within the smooth short cylindrical bore 62 formed by the adapter 63 screwed into the apertured bottom of bottle l0. Lip 60 seats against gasket 64 to form a gas-tight closure and is held thereagainst by means of the hand wheel 66 and its retaining collar 68, threaded to the adapter 63 and formed so as to press the flange 5| tightly against gasket 64, thus also firmly holding the interior bottle against relative movement.

In reloading the extinguisher, it is inverted, the hand wheel 66 is removed, freeing the interior bottle 40. The bottle I0 is substantially filled with powder, a charged gas bottle 40 with its attached valve is inserted into the powder and then the hand wheel 66 is replaced and tightened. Only the bottle 40 and its valve assembly need `be shipped back to the factory for recharging and the extinguisher as a whole can be reloaded without special tools or great trouble.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacrificing its chief advantages.

What is claimed is:

l. In a gas propelled dr'ypowder fire extinguisher the combination of a large bottle to be filled with the dry powder and having a wide mouth opening at one end thereof, said wide mouth opening provided with an internally recessed seat and a threaded exterior surface, a flanged valve member seated within the recessed seat of said opening by means of said flange. the inlet end of said valve member rigidly secured to the discharge end of a gas bottle positioned within said large bottle, the discharge opening of said valve member being completely within said large bottle, and a threaded ring screwed on to the mouth of said large bottle and securely clamping the flange to its seat and holding the gas bottle in position.

2. An extinguisher according to claim 1 in which a valved nozzle is positioned to said large powder containing bottle at the end opposite to the wide mouth opening of said large bottle.

3. In a dry powder fire extinguisher the combination of a large bottle to be filled with dry powder and having a wide mouth opening at one end thereof and a valved discharging outlet at the opposite end thereof through which the powder is to be expelled under pressure, a smaller high pressure gas bottle removable through the mouth opening of said large bottle, and means for supporting the gas bottle within the first bottle comprising a valve member attached to the gas bottle at the inlet end of said valve member and controlling the flow of gas therefrom into said large bottle, the discharge opening of said valve member being completely within said large bottle, said valve having a disc-like flange and an external control member, the mouth opening of said large bottle having a recessed seat to receive said flange of said valve member, and means for tightly holding said flange to its seat.

4,'An extinguisher according to claim 3 in which the control member has limited rotation with respect to its valve and the control member and flange are apertured to receive a sealing pin.

ERNEST E. SEABERG.

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

UNITED STATES PATENTS Number Name Date 1,343,951 WhyteA June 22, 1920 1,382,619 Blenio June 28, 1921 1,866,981 Meigs July 12, 1932 2,014,642 Andrews Sept. 1'7, 1935 2,079,924 Phister May 11, 1937 2,484,942 Guise Oct. 18, 1949 2,484,943 Guise Oct. 18, 1949

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