US2225320A - Fire extinguisher - Google Patents

Description

Dec. 17, 1940.

H. v. SAFFELL 2,225,320

FIRE EXTINGUISHER Filed Nov. 15, 1938 Patented Dec. 17, 1940 PATENT OFFICE man nxrnvomsnnn Harold V. Sailell, Los Angcles, Caiif., assignor, by direct and mesne assignments to Tetco 00., a corporation of California Application November 15, 1938, Serial No. 240,494

. 8 Claims.

This invention relates to a fire extinguisher and more particularly pertains to a combined container and applicator for fire extinguishing compounds of the character set forth in my co-pending application-for Letters Patent Serial Number 227,970, filed September 1, 1938; the invention also pertaining to fire extinguishers of the type disclosed in a companion application filed Nov. 15, 1938, and bearing Serial Number 240,493.

The primary object of the invention is to provide a combined container and applicator for a fire extinguishing compound composed of gas and liquid under pressure, embodying a discharge nozzle fitted with a sealing diaphragm adapted to be readily removed to permit discharge through the nozzle of the fluid content from the container under the urge of gas pressure developed therein.

Another object is to provide a construction in the applicator nozzle for facilitating sealing thereof by means of a diaphragm in a fashion to insure against leakage therethroughfrom the container of gas and liquid under pressure confined therein.

Another object is to provide-a construction in fire extinguishers of the type embodying an enclosed container for gas and liquid under pressure fitted with a discharge tube leading downwardly into the container from the upper end thereof, whereby assemblage of the tube on the container closure and sealing thereof may be readily eii'ected, and whereby the discharge end of the tube may be easily arranged to open laterally contiguous the margin of the container closure to eifect discharge of the fluid content of the container laterally from the upper end thereof.

With the foregoing objects in view, together with such other objects and advantages as may subsequently appear, the invention is carried into effect as illustrated by way of example in the-ac- 40 companying drawing, in which:

Fig. 1 is a view in vertical section of the fire extinguisher depicting one form of the invention; Fig. 2 is a detail in horizontal section taken on the line 2-2 of Fig. 1;

Fig; 3 is a detail in elevation as seen in the direction of the arrow 3 in Fig. 1; Fig. 4 is a view in section and elevation of a fragmentary portion of the discharge outlet showing a further modified form of the invention with the outlet closed.

Fig. 5 is a view in elevation as seen in the direction of the arrow 1 of Fig. 4 showing the outlet as 55 opened;

, II, which latter, however, is here shown as slightly modified in its construction to adapt it for purl0 poses of the present invention; the end wall ll embodying a frustro conical wall portion i2 connected at the base thereof to the upper margin of the cylindrical side wall i0 and merging at its reduced end portion into an annular fiange l3 15 formed with a circumferential channel a and connecting at its outer end with an inturned lip b encircling anopening c. A closure cap it is provided for closing the opening 0 which is here shown as cup-shaped and as having a marginal 20 rim d which overlies and is suitably adhered to the lip b with the body of the cap i4 extending into the neck portion of the container formed by the flange i3.

Extending through the bottom wall e of the cap 25 I4 is a tube I! which leads downwardly into the container at an incline and terminates and opens at its lower end at a point contiguous the intersection of the bottom wall 9 and the side wall ill of the container. 30

The upper end portion of the tube i5 is extended upwardly through the cap it and is turned laterally to extend over the margin of said cap in close proximity thereto and with an end portion I thereof projecting through a cover cap it encompassing the outer portion of the flange i3 and adhered thereto; the end portion f of the tube constituting a discharge nozzle which terminates contiguous the side wall of the cover cap i6 which latter serves as a guard to protect the upper end portion of the tube against dislodgment and consequent possible rupture of the closure cap II. The outer end of the nozzle thus formed is closed by a metallic diaphragm i1 formed of a ribbon of metal which overlies the 5 end of the tube and is adhered thereto as by a soldered joint i8 as shown in Fig. 2. A length of the diaphragm ribbon i1 is bent to return upon itself and to overlie the cap i8 and is fitted with a ring l9 constituting a finger hold whereby the ribbon may be pulled and the diaphragm ripped from engagement with the tube by rupturing the soldered joint [8.

In the form of the invention shown in Figs. 4,

5 and 6 embodying a modified form of the strucs5 ture shown in Fig. 1, the nozzle j on the upperend of the tube]! terminates adjacent the inner face of the side wall of the cover cap it which latter is fitted with a tear-ofl strip 32 which overlies the outer end of the nozzle I and is formed with a continuing strap ll which is bent back over the cap it and is fitted with a finger hold ring 34 so that the strip 32' may be readily ripped clear of the cap body IE to thereby open the nozzle 1 to discharge.-

When it is desired to fill the container with the fire extinguishing compound a desired quantity of liquid is placed in-the container through a the opening c before closing of the latter by the cap I which cap with its associated tube I5 is then cemented or soldered in place. Gas under pressure is then directed into the container through the then open tube i5 until desired pressure is built up interiorally of the container whereupon the outer open end of the tube is sealed by applying the diaphragm II as shown in Fig. 1, or affixing the cover cap IS with the tear-of! strip 32 as shown in Figs. 4 and 6; the sealing operation being eflected by suitable mechanism not necessary to be here shown in a fashion to minimize escape of the gas under pressure through the tube i5 during the sealing operation.

In the operation of the invention to eiIect extinguishment of fire the container is grasped and held so as to direct the discharge nozzle I, to ward the fire whereupon the diaphragm H, or 32', is ripped free to open the discharge end of the nozzle 1, thereby opening the tube I! to discharge. The liquid gas content of the container will then flow from the discharge nozzle under the urge oi gas pressure in the container.

I claim:

1. In a fire extinguisher, a closed container for fiuid under pressure having a top wall formed with an opening, 'a closure cap inserted in said opening and secured to said top wall, a cover cap overlying said closure cap having a side wall secured to said top wall, a tube extending through the bottom wall of said closure cap and leading downwardly into said container and opening contiguous the'bottom thereof; the upper end portion of said tube extending laterally over the margin of said closure cap in close proximity thereto and having its outer end terminating contiguous the side wall of said cover cap, a metallic ribbon overlying the outer open end of said tube adapted-to be removed to open said tube to discharge, and a finger-hold on said ribbon.

2. The structure called for in claim 1 in which the ribbon is detachably amxed to the end of said tube and is adapted to be ripped therefrom.

3. The structure called for in claim 1 in which the ribbon is carried by the cover cap.

HAROLD V. SAFFELL.

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