US1682833A - Fire extinguisher - Google Patents

Description

Sept. 4, 1928. 1,682,833

C. W. DAKE FIRE EXTINGUISHER Filed May 11, 1925 2 Sheets-Sheet 2 III,

BY Q's-A18 ATTORNEY.)

Patented Sept. 4, 1928.

NITED srATss WARE-7E5 W. EMF, WP CHIGAGU, ELEINOIB,

mas ism'msursm.

application filed May 11, 1925. serial No-. 29,291.

My invention relates to improvements in fire extinguishers and particularly to a fire extinguisher which will go into operation when a predetermined temperature has been reached. My extinguisher is particularly adapted for use in connection with automobiles and is primarily intended to be located under the hood of an automobile, in immediatejuxtaposition to the en ine so that in the 1.1 event that a fire starts at t at critical point the extinguisher may automatically go into action even before the operator is aware of it. Other objects of my invention willappear from time to time throughout the specification and claims.

My invention is illustrated more or less diagrammatically in the accompanying drawin s wherein-- lgure 1 is a plan vlew; Figure 2' is a section alongthe line 2-2 of Fi re 1' igure 3 is a section along the line 3-3 of Fi re 2, showing the fire extinguisher after it as gone into operation;

Figure 4 is a section along the lme 44 of Fi re 2;

igure 5 is an elevation of the combined In and bottle support; j igure 6 is a top plan view of the support so shown in Figure 5- Figure 7 is a diagrammatic showing 1n section of an automobile hood with engme and extinguisher in place.

Like parts are indlcated by like characters throughout the specification and drawings.

A is an automobile dash board. A 1s a bracket bolted or otherwise attached to the front side thereof within the hood enclosing the engine. A A are lugs projecting forwardly from the bracket or plate A havmg pins A projecting upwardly therefrom an adapted to be engaged by and support perforate cars A A projecting from the housing A", which housing rests against the lu s A The housing A is closed at the top and as at.

the bottom an open mouth surrounded by a flange or collar B. Slidable in this flange or collar B is a cylindrical plug B havmg lugs B adapted to pass through channels B in the collar B to permit the plug to be placed in position, the plug being then rotated to move the lugs B out of line with the channels B to limit downward movement of the plug. The plug 13 is flanged at B and slotted at B. The flange B is normally soldered in place in engagement with the underslde of the collar B to hold the parts in inoperatlve position. The collar B is perforated at B and these perforations register with the slots B so that when the plug is in the lower position shown in Figure 3 there is a passage through the perforations B"; the slots B and the space between the flange B and the lower wall of the collar Bwhereby fire extinguishing fluid may pass out from the interlor of the container A and be discharged from the receptacle in a generally horizontal direction. Projecting upwardly from the plug B are fingers B adapted to hold and an port a bottle B which may contain an aci or other suitable chemical. The plug has a downwardly extending cup B perforate at the bottom and open at the top. Shdable in this cup is a plunger B having a stem B traveling in the perforation at the bottom of the cup. A spring B is contained within the cup surrounding the stem and compressed between the plun er and the bottom of the cup being held un er com ression by a solder seal B which holds t e plunger and stem in the retracted position with the spring under compression. Closing the bot tom of the cup and protecting the plunger is a thin cap B which is placed there in order to protect the stem and the solder during installation and while the device is in the inoperative position.

The housing itself contains a chemical which when mixed with the chemical in the glass bottle exerts a pressure and forms an inert or fire extinguishing gas or liquid or foam as the case may be. The solder holding the stem in place is adpted to melt when a temperature of approximately two hundred degrees is reached. The solder holding the plug in place is adapted to melt when a temerature of three hundred degrees is reached.

he solder seal holding the plug in place is of such strength that when the glass bottle is broken the chemicals mixing will set up a pressure suflicient to break the solder seal and permit the plug to drop down and allow liquid or gas to rush out from the container or housing.

This container as a unit assembled in the relation shown in Figure 2 may be placed under the hood of an automobile or in any other suitable place where fire protection is desired. The cap at the bottom protects the pin or stem and the solder from accidental 110 release or distortion. If the temperature surrounding the fire extinguishing unit reaches a point suflicient to melt the solder or other material holdin the stem in the retracted position, the seal is broken, the spring is then released and the plunger is thrown violently upward into the position shown in Figure 3 breaking the bottle which is of glass or other suitable material and allowing t e two chemicals to mix. The pressure exerted is sufiicient to force the plug down breaking the outer solder seal, the chemicals from the container then rush out through the space surrounding the plug and are dischar ed in a horizontal position at the bottom of tie plug. Leakage of the chemical through the center of the plug is prevented because the lun er is normally at all times in contact with the cup and the pressure exerted upon the plug will only tend to compress t e spring. The fire extinguishing chemical thrown out violently in a generally horizontal direction will of course be effectively distributed throughout the area surrounding the fire extinguisher and if this fire extinguisher is located in an automobile hood, it will fill the hood with a non-combustible as puttin out the fire and at the same time bringing are engine to a stop because the automobile engine Which draws its air to support combustion from beneath the hood will under such conditions instead of drawing in air will draw in the inert gas which extinguishes the fire and will not su port combustion in the engine. Thus t e re is put out and the driver is automatical- 2 V I '1,eaa,aaa

1y apprised of the fact that something has gone wrong,-

I claim:

1. In an automatic fire extinguisher, an outer casin and means for supporting it, said casing aving an aperture in the lower part thereof, a closure for said aperture and a securing means therefor, a container, mounted within said outer casing, and a fire extinguishing substance therein, means for releasing said substance in response to a predetermined rise in temperature, said substance, when released, being adapted to create sufficient pressure to break the securing means and release the closure.

2. In an automatic fire extinguisher, and outer casin and means for supporting it, said casing aving an aperture in the lower part thereof, a closure for said aperture and a securing means therefor, a container, mounted within said outer casing, and a fire extinguishing substance therein, means for releasing said substance in response to a pre determined rise in temperature, said substance, when released, bemg adapted to create sufiicient ressure to break the securing means and re ease the closure means on said closure for setting a predetermined limit to its movement after release and lateral deflecting means on said closure ada ted laterally to discharge the fire extinguishing substance passing throu h the closure.

Signed at hicago, county of Cook and State of Illinois, this 24th day of April, 1925.

CHARLES W. DAKE.

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