US1750859A - Fire extinguisher - Google Patents

Description

Patented Mar. 18, 1930 UNITED SIATESPATENT OFFICE JOHN' RAUS, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE NATIONAL FOBME'IAL COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO FIRE EXTINGUISHER Application filed March 24, 1921. Serial No. 455,240.

This invention relates to fire extinguishing apparatus and its objects are the provision of a small and comparatively inexpensive extinguisher for domestic or automobile use,

which shall be so small as easily to be carried and conveniently handled by a woman; in which the charge can be conveniently stored, shipped, and handled; wherein the deterioration of the extinguisher and its contents during idleness shall be at a minimum; the provision of an extinguisher whose use shall serve effectively to extinguish" fires, but without injury to paint or varnish; whilefother objects and advantages of the invention will become apparent as the description proceeds. In the drawing accompanying and formingv a part of thls application I have shown one embodiment of my said invention, butwithout intent to limit myself thereto since many changes can be made without departing from my inventive idea. In these drawings Fig. 1 is a sectional view through my improved extinguisher; Fig. 2 is an enlarged detail sec-l tional view corresponding to the line 2-2 of Fig. 1; and Fig. 3 represents a cross-section of the extinguisher.

Describing the parts acters, 1 represents the body ofthe can or container, preferably of about one or two quarts capacity, although the size is immaterial, having at one end the closed cap 2, at

the opposite end the apertured cap 3, and at one side the handle 4. Located near the cap 3 upon the side opposite the handle is a transverse nozzle 5 which should be positioned as near the end of the container as possible.

Rigidly brazed in the aperture of the cap 3 is the threaded ring 6 in which is removably seated the thimble 7 formed at its outer end with an external flange 8, at its inner end with an internal flange 9 and in its wall with apertures 10. A. threaded cap 11 tightly screwed on the ring 6 holds the thimble in place and prevents leakage. Slidably mounted in this cap is an axial plunger 13 having at its outer end a head 14 'andat its inner enda piercing point 15, a suitable stop flange 16 being provided between the same. At each face of the cap the plunger is surrounded by a soft packing 17 and between the by reference char- I outer packing and the head is interposed a seating washer 18 and spring 19 which serves the double function of holding the plunger in outward position and exerti'ng a sealing pressure on the packing rings 17-17.

Carried by the thimble 7 is a metal capsule 20 adapted to contain acid. This capsule is preferably made of some metal like lead which is easily perforated, which is not attacked by the acid employed, which can be hermetically sealed and which can be sent through the mails. I have'shown one end as closed by folding and soldering as at 21 and the'other end by av soldered cap 22 which is formed at its center with a thin perforable portion 23 in line with the plunger and around its periphery with aflange 24 which interfits with the flange 9 to hold the capsulein place. In order to prevent any accidental or premature perforation of the capsule I provide a removable pin 25 traversing the washer 18 since this facilitates'its insertion, but it may be located almost anywhere. Also to prevent leakage of the solution I employ a removable stopper for the nozzle, preferably a spring metal cap 26 havinga cork pad 27 therein and a chain 28 attached to the pin 25;"

Handles of any kind can be employed, those I prefer being of the folding kindshown in Figs. 1 and 3, curvedso as to conform to the shape of the extinguisher when folded and securecl'in place by the metal straps 30. I

have also shown one end of the extinguisher I as provided with a rigid handle 31.

To secure the extinguisher in position for v instant use I provlde a bracket, for example that shown in Fig. 1 comprising a base plate 32, end fingers 33, and side fingers 34. {The endfingers are made in pairs, spaced so as to receive between them the handle 31 at one end and the cap 11 at the other, theirtips being turned inwardly as at 35 so as tocooperate with the spring fingers 34 in holding the device yieldingly in place. The two-ends of the bracket are identical so that it may be installed either end up and the extinguisher applied to it either end up, indiscriminately. Each end is preferably provided with a spring hook 36 to which the chain 28 is attached when not in use, thus ensuring that v 15 Capsule in place.

. the extinguisl'ler Will be. automatically prev pared for actionoby the'mere act of remoV-' ing it from the bracket. v .The container is first filled with afsolution' ofsodium bicarbonate or other inexpensive saltfcontaining a large amount'of displaceable gas, and the ca'psule is filled w ithsulphuric' acid, hydrochloric acid, or other inexpensive substance of this nature. -When 10 this capsule is perforated the result is a slow steady escape of acidwhich produces a constant evolution of gasandmaintains a steady stream fromthe nozzle which canbe ac curately controlled. A-spaCerB? lreepsthe order to produce a frothy liquid an aluminum salt can be employedin addition toithe gas-producing salt, in which event I prefer to employ hydrochloric acid rather i than sulphuricacid because of .the decreased tendency towards the production of insoluble I compounds'which would obstruct the nozzle and clogthe apparatus; g V 7 d 'f The employment ofa metal capsule as de- 5 sjcrib ed enablestheacid charge to be trans l V ported byima il'and to be stored and applied 1 without difficulty; the comparatively slow outflow of acid obtained in this wayll'eadsto a more uniform stream pressurewhich can f r 30 pewter controlled and is not solikely' to Y 'the device here shown is much cheaper to turn-into spray before the fire is reached;

. and charge than "most extinguishers, but it will be understood that many changes I 1.35 can be made withoutdeparting from my in vention as defined in the annexed claims. Having thus described my invention what TIclaimis: f f

a 1. As an article of manufacture an elongat- V a ed acidcapsule ofincorrodible ductileirnetal having at one endan external securing flange and an integral perforable regionadjacent thereto. f.. I f 3 Y 2. acid container for fire extinguishers 7 f y '45 comprising a cylindrical body of soft non- 50 folded.

' {corrodible metal having atone end an external flange and a leak-proof perforable .web

.- l0 c ate d inthe planet of said flange5 the ,oppo-f site end said body being-flattenedand f Anacidlcontainer,foriire extinguishers "comprising ahono'w cylindrical body having one end'closed and provided with laterally projecting supporting means, and the other,

end reduced in diameter and folded to form v hermetically sealed capsule said closed end j having a perforable portion. V. I v 7 In-testimonywhereof; I hereunto affix my signature.- 7 o 7 JOHN RAUS.

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