US1851056A - Fire extinguisher - Google Patents

Description

7 March '29; 1932.

A. B, PHISTER 1,851,056

FIRE EXTINGUISHER Filed Jan. 9, 1928 g INVEN TOR. I 4 :0: mama! aaflw r M 2 'A TTORNEY.

Patented Mar. 29, 1932 UNITED STATES PATENToFF 'C if:

ALBERT B.1?HISTER,OF FORTTHOMAS, xnnrucxznssrenon To THE ;Hrsms mw;

FAGTURING COMPANY, or CINCINNATI, 01110, A conronar on on nnnawnnn- FIRE nxrrneursnnn Application filed January 9, 1928. Serial No. 245,286.

My invention relates to' fire extinguisher casings, and particularly to the heads thereof.

In the past it has been customary in making fire extinguishers to provide a tubular shell, a convex sheet metal head which is soldered to the shell, and a reinforced neck which is used for a charging orifice and retainer for the cap, and which is soldered by means I of an annular flange extending from the lower annular edge ofthe neck within a central opening in the sheet head. The handles with which the extinguisher is transported or hung have been inserted and soldered in holes in the head as hasbeen the discharge conduit.

The many soldered joints in holes in the thin sheet heads have been a source of weakness in the permanence of the extinguishers, because of their liability to leakage, Further, the expense required for hand labor in their manufacture has been great.

It is the object of my lnvention to provide a convex head formed from a metal cast ng which will have a neck portion integrally formed with. it. Further, it is my object to also cast integrally with the head a discharge portion to which a discharge conduit maybe readily threaded, if desired; I furtherhave as an object to cast integrally with the head a support extending outwardly from the periphery of the head which may be drilled for the inserting of carrying handles without it being necessary to drill through the head, thereby communicating with the interior and making a source of possible leakage. '-Another object is the provision of a channel in the periphery of the lower edge of the integrally cast head which will retain a flaring flange of the upper annular edge of the shell. A still further object is the provision of cast lugs within the head which may be usedto bend over and thereby retain'a screen. adjacent of the discharge orifice. The above and other objects to which reference will be made during the ensuing disclosure I accomplish by that certain combination and arrangement of parts of'which I have shown a preferred embodiment.

Referring to the drawings v V V I Figure l is a plan view of a fire extinguisher 50 showing my novel casing structure.

head and side walls.

Figur'e2gis, a vertical section taken :along';

the lines 22 in Figure 1. V

Figure 3 is a detail :sectionon an enlarged scale showing the connection betweenthe Figure .4 is a detailedview of a portion. of the head from within showing the screen supportu, i r

' Fig. 4a is an enlarged fragmentary view of thecast recess for the screen. 7 i

porting means.

Figure 5 ma fragmentary plan vlew of the r 'extmguishershowinga modified form ofsup- The she ll-.1 forming the main bo y of I container, 1s provided atits base with a-spunmetal bottom 2having annular flanged por tions 3 which are soldered to the interiorwalls r of the :shell. An extensionv .4 forms isup-i porting base The head :is iormed-withlarr' integral casting comprising the.-concave1disk.-'

like. portion 5 withytheneck: 5a; integrally cast,

therewith. 'f

The, lower. annularedge of the provided with an-annular groove 6a in whichan annular flange 7 0% the shell 1 is securely soldered; Before soldering .tli'eouter lipot the groove is turned inwardly as indicated. Aninturned flange .8 extending inwardly trom the base-of the neck supports a cage?) which, supports a receptacle 9a which :con-' .tains achemicalr 'The containernis supplied with another chemical which, whenthe con tamer-is 1I'1V8I't6d,-. is acted on :by xthefirst chemicalforming :gas which generates pressure and :the liquid in the extinguisher-is projected through the nozzle.

- Theghosefz'tO has a coupling piece into Wlricha nipple 11 is -'scre wed is screwed into athreaded apertureTQF'in' :the-ca'st extension 13' ofth'e head.' The in-' ternal side of the head also has a recessed portion 14 integrally cast therewith with lugs 15 which are used to bend over and secure a screen'lfi which prevents any sediment a from being thrown onto thefire or blocking 17 which, when the extinguisher is inverted,

falls out of the neck, thereby releasing the contents.

The exterior periphery of the neck 5a is threaded as indicated at 18, and a cap member 19 is thereby secured on the neck. A flexible gasket provides a seal which prevents leakage.

Extending from the outer periphery of the cap I further cast the lugs 20 which may be drilled out for retaining the shanks 21 of the handle 22. In some modifications the carrying handle is not required, sothat the lugs 20 may be cast as an eye, thereby providing means by which the extinguisher may be supported. Such a modification is indicated in Figure 5 in which the lugs 20a form an eye 20?).

The principle of supporting a chemical container in an extinguisher with liquid which will efi'ervesce with the'invertion of the container is old and well lmown, and I make no claim to the principle of operation of the type of extinguisher illustrated.

Having-thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. .In combination with a fire extinguisher casing having a tubular shell, a cast head with a neck integrally formed therewith, a discharge conduithaving a passage extending .fromithe interior of the extinguisher casing in substantial alignment with the side walls of the casing and integrally formed with said head, said head further having a recessed portion with lugs cast integrally with said head bent over and retaining a screen formed on the inner face of said head to filter material projected through said discharge conduit. I

2. In combination with a fireextinguisher casing having a tubular shell, a cast head with a neck integrally formed therewith, a discharge conduit having a passage extending from the interior of the extinguisher casing in substantial alignment with the side walls of the casing and integrally formed with said head, a support extending outwardly from the peripheral edge of the head also integrally cast with said head, and a re-- cessed portion with lugs cast'integrally with said head bent over and. retaining a screen formed on the inner face of said head to filter material projected through said dis charge conduit.

ALBERT B. PI-IISTER.

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