US1638017A - Fire extinguisher - Google Patents

Description

Aug. 9,1927.

.1. RAUS v FIRE EXTINGUISHER Original Filed Jan. 22, 1923 INVENTOR. Join Raus A TTORNEY.

Patented A'u 9; 1927.

UNITED-STATES PATENT OFFICE.

JOHN RAUS, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE NA- TIQNAL FOB/METAL COMPANY, OFOLEVELAND, OHIO, A CORPORATION OF OHIO.

' many changes can be made without FIRE EXTINGUISHEB. 7

Application filed January 22 1923, serial No. 614,123. Renewed May 21, 1927.

I This invention relatesto fire. extinguishing apparatus and has for its object theprovision of a small and comparat vely nexpensive extinguisher for domestlc, factory and indoor use which shall be so small as easily to be carried: and conveniently operated; in which the charge can be conveniently stored, shipped and handled; wherein the deterioration of the extingulsher and its contents during the idleness shall be a minimum; the provision of an extinguisher whose use shall serve effectivelvto extinguish fires but without lllllll'yto pa nt or varnish or danger of asphyxiation; while further objects and advantages of the invention will become apparent as the description proceeds. f a In the drawings accompanying and forming a part of this application I have shown one embodiment of my said invention, but without intent to limit myself thereto S1306 eparting from the scope-of my inventive idea. In these drawings Fig.1 is a front elevation .of'my improved extinguisher'together with its supporting bracket; Fig. 2 isa central sectional view of the extinguisher and bracket-corresponding to theline 2-2 of Fig. 1; Fig. 3 is. an enlarged detail sectional view of the upperend of the extinguisher showing the acid capsule partly in section; Fig. 4.

is a horizontal sectional view corresponding to the line 4.-4 in Fi 1; Fig. 5 illustrates the blank from whic the acid capsule is -made; Fig. 6. illustrates themode of forming the base of the capsule; Fig. 7 illustrates the mode of forming the mouth of the capsule and Fig.- 8 illustrates a modified construction .of capsule.

Describing the parts by reference char acters, 1'represents the body of the can or container, preferably of about one or two quarts capacity, although the size is not restricted, having at one end the closed cap 2., and handle 3 and at the opposite end the apertured cap 4. Located near-the cap 4 at,

one side of the container is the transverse nozzle 5 which is located as near the end of the container as possible;

The cap 4 has an axial aperture surrounded bythe threaded flange 6 on'which is screwed the bonnet 7 also provided with a hollow neck 8 in .which is slidably mounted the shank 9 of a lunger. This plunger.

is formed insidethe onnet with an enlargement 10 and outside thereof with a head 11, between which and the bonnet is interposed the spring 12, the inner face of the bonnet being covered by a suitable packing disk 13 which prevents leakage at either edge of the (ill same. The outer end of this bonnet is preferably counterbored for a packing washer 14 and a metal washer 14*, the latter being engaged by the spring 12 which holds it in place and exerts the desired sealing pressure on the washer.

Locatedun the flange 6 1s a removable thimble 15 having at its inner end an intransverse end wall 22 having opposite the" end of the plunger a portion 23 of decreased thickness. The end of the plunger is formed with a piercing point 24 and suitable means are employed to hold the capsule against the flange 16 at all times, such means inthe present case comprising asprin'g 25 secured to the enlargement 10 and pressing against the capsule.

The bracket here shown comprises a base I plate 30 adapted to be secured to a wall or like support having -at its upper end a pair of spaced vertical plates 31 between which the plunger 9 is inserted, the width of these plates being such as to fill the space between thetop of the bonnet 7 andthe bottom of the head 11. At the other end thebracket is formed with a spring finger 32 having at its end a knob 33 adapted to engage a groove 34 formed in the cap 2. Projecting from the side of the bracket is another spring arm 36 provided with a cushion 35 of sealing material such as rubber adapted to engage the nozzle and closing the same so as to prevent loss of contents of the container. a

. This container is filled substantially full of a solution of baking soda, with or without additional substances like certain aluminum salts to produce foaming; the capsule 20 is filled with a suitable acid substance such as sulphuric acid or hydrochloric acid, and hermetically sealed thereby preventing either loss of contents, ingress of moisture or prethe acid capsule so as to removed mature actuation. The construction of the bracket holds the extinguisher in such wise as to prevent accidental actuation of the plunger or leakage and evaporation of liquid. Upon the necessity of use the device is from the bracket by a simplepull thereby the plunger which is thereupon struck smartly upon the floor or some convenient object, puncturing the weakened portion of permit the gradual escape of its contents. The springs 12 and effect the immediate withdrawal of the plunger from obstructing position and seal the bonnet against leakage by pressing the enlargement 10 against the packing 13. The comparatively slowescape of the acid from the small perforation made by the plunger causes "the gas pressure nside the container to remain substantially constant during the entire operation of the device and also causes the ejected liquid to possess a substantially uniform, non-corrosive composition.

This acid capsule is preferably made of lead owing to its cheapness, its softness and its non corrodible nature; It is preferably made by casting or die forming a cartridge as shown in Fig. 5 with a cylindrical wall and one closed end 41 of somewhat greatceives the same,

er thickness than the wall.

A cylindricalmandrel 42 is then inserted into the cartridge, said mandrel havin at one end 'the central boss 43 and being of exactly the requisite and mandrel are inserted into a cylindrical recess of a' die block 44 which, exactly re the upper end of this recess being counterbored as shown at 47 The upper end of the cartridge is then struck with the movable member 45 of the punch press which displaces the metal of the closure 41 laterally into the recess 47 forming the flange 21 and also produces the central region of reduced thickness shown at 23 in Fig. 3.

unsealing the nozzle and releasing- 'fire departments, etc., wherefore length and the cartridge ing at its open end an external lip 51 adapted to receive a tightly fittingi closure cap 52' whose center is formed with a weakened or perforable portion 53 and whose lip is crimped over the flange 51 as-shown at 54. This arrangement is preferably for large size installations such same can equally. and advantageously be applied to the large devices used b factories,

strict myself to any dimensions, nor to any the cartridge is thenthe capsule'is .filled 4 as those used for factories, and fire departments. \Vhile I have illustrated my improvements as applied to a small sized device, it: will be understood that many features of the" do not re-.

matters of detail or construction except as specifically recited in my claim.

. Having thus described my invention, what I claim is:

The combination with a fire extinguisher comprising-a liquid container having a nozzle near one end, a reciprocable plunger-projecting from one end, and a handle at the opposite end, of a bracket having near one end a pair of arms adapted to secure said plunger insupporting and movement preventi'ng relation, a flexible arm atthe opposite end of said bracket to engage said receptacle yieldingly, and a spring arm projecting laterally fromone side of said bracket and having at its free end a pad adapted to cover said nozzle. i

In testimony whereof, I hereunto afiix my signature.

JIOHN A S.

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