US1588234A - Pyrotechnic fire extinguisher - Google Patents

Description

June 8 1926.

R. KAUCH ET AL PYROTECHNIC FIRBEXTINGUISHER Filed March 29. l923 Ill.

Patented June 8, 1926.

UNITED STATES 1,588,234 PATENT oFrIcE.

ROBERT KA UGH AND CHARLES L. PAULUS, OF DAYTON, OHIO.

PYROTECHNIC FIRE EXTINGUISHER.

Application filed March 29, 1923. Serial No. 628,590.

This invention relates to a pyrotechnic fire extinguisher. i

The object of the present invention 1s to produce a fire extinguisher embodying 1n 6 connection with a suitable container, means for closing the end portions of the container when not in use with fluid tight joints, 'a pyrotechnic means for exerting the necessary pressure in conjunction with a suitable plunger for rupturing the container and sealing means and thereby expressing the fire extinguishing fluid from the container.

Before the p otechnic means is put in operation by sultable firing means, the container is absolutely fluid tight so that no part of the fire extinguishing fluid may escape therefrom. When the pyrotechnic means is put in operation, a plunger is actuated lengthwise of the container and by reason of the pressure exerted upon the fire extinguishing fluid, the discharge end closure is ruptured or punctured, thus permitting the outflow of the fire extinguishing.

With the above and other objects in view the invention consists inthe novel construction, combination and arrangement herein shown, described and claimed. I

Figure 1 is. a diametrical longitudinal section through my improved fire extinguisher. Figure 2 is an enlarged detail of the structure of my piston and retaining cup.

The improved fire extinguisher -com prises a container 1 for the fire extinguishing fluid, liquid or other agent used. The

container 1 may be of any required-diameter, length and containing capacity. Preferably the container 1 is of cylindrical form and primarily open at both ends. Ad-

jacent to its rear end, the container 1 is somewhat flared or enlarged and formed with an internal tapering or conical face or seat 2 against which is placed the cupped peripheral portion of diaphragm 3 formed preferably of some light, easily ruptured metal, although other materials may be used in lieu thereof. Within the same end of the container 1 there isinserted a cup shaped holder 4 having an externally beveled" end portion 5 which bears tightly against the inner surface of the cupped portion of the diaphragm 3 to hold said diaphragm firmly in place with a fluid tight joint.

The holder 4 is formed with a flanged or reduced opening 6, into and through which is inserted the pyrotechnic means consisting of a cartridge or shell 7 of easily frangible material such as paper, and containing a charge of powder WhlC-h upon being ignited will create a gas within the cup 4 for a purpose which will presently appear. Mounted within the cup 4 is a plunger or movable piston 8 which is corrugated as shown at 9 to 'Ve the same the necessary strength. The edge portion of the plunger 8 is brought to a knife edge as shown at 10 and such knife edge is preferably scalloped-as indicated at 11. When the cartridge 7 is ignited the pressure of the gas generated thereby causes the plunger 8 to move toward the opposite end of the container 1 and the shearing edge of said plunger cuts through'the diaphragm 3 Arranged behind the cup 4 is a sealing is thus detachable from the container forms a mounting for a centrally arranged firing pin or striker 18, having at its outer end a knob 19 against which the operator strikes his hand in firing the cartridge or shell 7.

The opposite end of the container 1 is closed by a deformable diaphragm 20 formed with annular corrugations 21 as shown, to enable the same to be more readily deformed when pressure thereon is exerted by the fluid in the container 1. The peripheral portion of the diaphragm 20 is cupped as shown and seated against the externally beveled face 22 at the adjacent end of the container 1. The cap 23 is threaded upon the discharge end of the container 1 and formed with an internally beveled seat 24 which bears against the periphery of the diaphragm 20 and confines the same in place with a fluid tight joint. The cap 23 is formed with an inwardly extending nozzle 25, terminating in a puncturing point 26,

adapted to puncture a hole in the diaphragm 20 when the latter is pressed against and over the point 26. A bifurcated outlet passage 27 extends through the' nozzle 25 and the cap 23 so that when the diaphragm 20 container as shown at 17. The cap 16 which is punctured, the fire extinguishing fluid creates a pressure in the shell 4 behind the plunger 8, driving the plunger forward.

I This immediately ruptures and displaces the diaphragm 3 which is carried forward by the plunger. The pressure is now transmitted to the fire extinguishing fluid ln the container 1 and this brings about the. necessary deformation of the diaphragm I and also the cup shaped holder 4. It is to cause the same to be punctured by the point 26- of the nozzle 25. Thereupon the passage 27 is uncovered and the contents of the container 1 are discharged by the con- 4 tinued pressure exerted in the rear of and against the plunger 8 by the gas generated by the cartridge 7.

It will be readily understood that new diaphragms 3,12 and 20'may be substituted when refilling the container 1 This is accomplished by removing the caps 16 and 23 convenient to first replace all of the parts at the rear, end of the container, then refill the container through the opposite or discharge end', after which a new diaphragmv 20 is inserted in place and the end cap 23 finally screwed into place.

" We claim: I

. 1 In a device of the classy described, a main casing, a fluid tight diaphragm in said casing, a fluid chamber in said casing, an expressing plunger, said diaphragm normally separating said fluid from said plunger, and

means for actuating said plunger to rupture the diaphragm and exert an expelling force on said flui i 2-. In a container of the class described, a

x fluid tight deformable diaphragm at the discharge end thereof, a second diaphragm inI said container, said diaphragms and the walls of the container defining a fluid cham her, an expressing plunger in said container ad acent to said second diaphragm, and

- means for actuating said plunger to'rupture both said diaphra s -and exert an expelhng force on the uid.

3. In a fire extinguisher, a casing, a fluid diaphragm.

I tures.

tight deformable diaphragm at the discharge end of the casing, a second diaphragm in said container, sa id diaphragms and the I ond named diaphragm.

4. In a fire extinguisher, a fire extinguishing fluid container, a fluid tight deformable diaphragm at the discharge end thereof, a

second fluid tight diaphragm in the opposite end portion of the container, a plunger arranged behind the second named diaphragm and having means to shear the same, pyrotechnic means for actuating said plunger, and means for puncturing the first named diaphragm, including a removable cap for the discharge end of the container, and a discharge nozzle on said cap having a pointed projection to puncture the first named diaphragm. 5. In a fire extinguisher, a fire extinguishing fluid container, a fluid tight deformable diaphragm at the discharge end thereof, a

second fluid tight diaphragm in the opposite end portion of the container, a plun er arranged behind the second named diap agm 4 and having means to shear the same, pyrotechnic means for actuating said plunger, a cup shaped holder for the pyrotechnic means and means for puncturing the first named diaphragm. I

6. In a fire extinguisher, a fire extinguishing fluid container, a fluid tight deformable diaphragm at the discharge end thereof, a second fluid-tight diaphragm in the opposite end portion of the container, a plungerarranged behind the second named diaphragm and having means to shear the same, pyrotechnic means for actuating said plunger, a cup shaped holder for the pyrotechnic means, a sealing diaphragm behind said holder, a cap fitted to the adjacent end of the container to hold said sealing diaphragm inglace, firing means supported by said cap, an

means for puncturing the first named In testlmony whereof we aflix" our signa- ROBERT KAUCH. J CHARLES L. PAULUS;

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