US1670979A - Fire extinguisher - Google Patents

Description

"May 22, 1928.

'c. NUHR-ING FIRE EXTINGUISHER Filed June 24, 1925 IIII/QILI/OIT, m W

Patented ay 22, 1928.

CHARLES nunnme, or CINCINNATI, OHIO. y

FIRE EXTINGUISHER,

Application filedJ'une 24, 1925. Serial No. 39,270."

'Other objects of the invention will ap P m the following detailed description thereof.

In the drawings:

Figure 1 is a vertical section of one form of extinguisher constructed in accordance:

' with a solution of chloride of calclum, and

with this invention.

Figure 2 is a vertical section of another form of the extinguisher in accordance with this invention. 1

Referring to the type of extingulsher illustrated in Figure 1, the numeral 1 1nd1- I cates a metal container having a base 2 upon which the same is adapted normally to rest, and a rest 3 upon which it is adapted to be set when inverted for use. Inside the container 1 is a secondary container 4:, the upper part of which is provided with a threaded flange 5 for a sealing ring 6. The r1ng'6 1s adapted to secure in position a th1n str p of lead foil or similar easily'perforated material 7 to seal the container 4:. Inside the container 4 is a weight 8, the lower surface of which is flat so as to rest normally upon the bottom of the container 4. The upper surface of the weight 8 is tapered as shown, so that the central portion thereof may protrude through the upper end of the c0ntainer 1 when the sealing sheet 7 is ruptured i by, means of a series of points 9 carried by the weight on its upper side.' The ring 6 is provided with upright standards 10 between which is a base 11 fora bottle or jar 12, sa d standards being also provided with bands 13 to support the jar laterally. The ar 1 is provided with a loose stopper 1 1 which drops out by gravity when the devlce is inverted, the bands 13 serving to hold the jar from dropping when the device is in this position. The container 1 is provided with the usual outlet 15.

Inside the container 1 is a solution of sodium bicarbonate 16 and the jar 12 carries a supply of sulphuric or other suitable, acid,

bv means of whichwhen liberated the bicarbonate solution is caused to generate a gas to expel the solution through the outlet Inside the container 1 I provide a supply of carbon tetrachloride. When the device is inverted the weight 8 drops, puncturing the sealing sheet or membrane 7 and the carbon tetrachloride isliberated through the opening in the weight into the solution and thus expelled through the opening therewitlr y In Figure 2 of the drawings I have illustrated an extinguisher of the type wherein air pressure is maintained in the device for. expelling the. extinguishing fluid atthe desired time. In this construction two tanks or containers 17 and '18 are provided, one of which, 17 for instance, may be provided the other with a supply of carbon tetrachloride. Air pressure is maintained in the tanks by'means of pipes 19 which extendsubstantially to the bottoms thereof.- A

is arranged so that the air pressure may be supplied through said pipes or when desired the solution may be expelled through the outlethose 21 by means of such pressure; When so expelled the chloride of calcium and carbon tetrachloride are mixed.

The operation of the device in either form as above described will, it isthought, be apparent to those skilled in the art to three-way valve 20 of ordinary construction y which .thesame appertainsj Vhen the container or tank 1 is inverted the device il lustrated in Figure 1 operates, in so far as the sodium bicarbonate and acid are concerned, in the same manner as extinguishers of well-known construction now 'on the market. Simultaneous with the inversion of the tank, however, the carbon tetrachloride is liberated into the solution and this when it becomes heated by. the fire to be extinguished generates gas in great volume which serves very rapidly and expeditiously to extinguish the flame. I am aware that carbon tetrachloride has heretofore been used for extinguishers, but where the same is employed by itself the gas is frequently generated prior to the actual application thereof to the fire, and thus the gases may be and frequently are carried away by winds and thus fail of their object. same mixed with the less volatile 'sodium ,bicarbonateor chloride of calcium the same is insured of actual application to the seat By having the pal or feature of Which rests in themixing v or damping of the carbon tetrachloride with or by means of a less volatile liquioL- I Having thus fully describediny invention, What I claim as new and desire to secure by Letters Patent is:

- soda solution may be caused to mix to gen-' tomix gradually with said solution during "expulsion.

2. In a fire extinguisher, in combination -With a'tank containin r a fire extin 'uishin I solution, asezondtank inside said tank, said second tank containing a quantity of carbon tetrachloride, means for sealing the contents.

- v v Yin said second tank from said first tank 1. 1m a lire extinguisher a normally" isolated quantity of carbon tetrachloride, a, normally isolated-solution of sodiuin bimeans for generating pressure for expelling the solution from said first tank, and means whereby the said carbon tetrachloride may K be discharged "gradually into the solution in first mentioned'tanlg. I I; r i ,CHARLES NUHRING.

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