US1259783A - Fire-extinguisher. - Google Patents

Description

' FIRE EXTINGUISHER.

Patented Mar. 19, 1918.

@MM-c E. SCHAEFER & 0.1. HOLMES.

FIRE EXTINGUISHER.

APPLICATION FILED DEC. I6|l9l3 L259J83. h Patented Mar. 19, 1918.

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II III IIIIIII III EDWARD SCHAEFER AND OSCAR J. HOLMES, ST. LOUIS, MISSOURI, ASSIGNORS T0 ONOFREZO FIRE EXTINGUISHER MANUFACTURING COMPANY, OF ST. LOUIS, MIS- SOURI, A CORPORATION OF MISSOURI.

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To all whom t may concern:

Be it lmown that we, EDWARD -SoHAErnR and OSCAR J. HOLMES, citizens of the United States, and residents of St. Louis Missouri have invented certain new and useful Improvements in Fire-Extinguishers, of which the following is a specification containing a full7 clear, and exact description, reference being had to the accompanying drawings, l

invention is to provide a novel means common to both for simultaneously freein the expelling substance and re extingui ing compound.

With the above purposes in view our invention consists in certain novel features of construction and arrangement of parts as will'be hereinafter more full described, pointed out in the claims and il ustrated by the accompanying drawings, in which- Figure 1 is an elevation of our improved re extinguisher;

Fig. 2 is a plan of the extinguisher;

Fig. 3 is a lan showing ourr improved means for hol mg and opening the duplex receptacle for the expelling substance.

Fig. 4 is a vertical2 sectional elevation of the complete extinguisher;

Fig. 5 is an enlarged fragmental elevation partly in section illustrating our novel nozzle opening means; and

Fig. 6 is a sectional bottle breaking means. A

Referring by numerals to the accompanying drawings:

7 designates the body portion of the extinguisher which in the present instance is preferably constructed from a single'piece of seamless tubing at the upper end of the body portion 7 and therewithin is an inter- Specicationof Letters Patent.

plan illustrating the Patented Mar. 19, 1913.

Application led December 16, 1913. Serial No. 806,995.

nally threaded ring 8 providing means for the attachment of a screw cap 9.

Formed on the upper face of the cap 9 is a pair of diametrlcally opposite integral ribs 10 whichproject free above the upper surface of said cap and alford a means for applying a Spanner to assist in the placing or removal of the cap.

In one of the ribs there is'formed a bore 11 which has at its outer end a threaded seat 12 arranged to receive a nozzle 13 and the inner end of the bore is threaded as at 14 to receive a plug 15 which plug, as clearly shown in Fig. 5, is hollow for a portion of its length and within the length of the hollowed out portion is provided with a reduced neck 16 whereby the plug may be readily broken for purposes hereinafter made clear.

The cap'9 is provided with a vertical and' centrally disposed aperture surrounded by a threaded neck 17 arranged to receive a a stem 19 having at its upper end a knob 2O for its operation and at its lowerend with- 'stuffing-box 18 through which is extended J in the body 7 is an internally threaded holder in the form of an inverted cup 21.

Impinging between the knob 20 and the cap 9 and surrounding the stem 19 is a coil spring 22 arranged to normally hold the stem 19 elevated.

Carried by the stem 19 is a collar 23 which serves the double function of limiting the .upward movement of the stem and also as a means to engage the plug 15 when it is desired to free the contents of the extinguisher. Permanently secured to thebody 7 of the extinguisher is a cup-shaped base 24.

At the upper end of the base 24 there is a shoulder 25 which forms a seat for a pair of crossed straps 26 in each of which at their intersecting oints there is a threaded aperture arranged3 to receive the threaded end of a rod 27 the lowermost end of which extends through the bottom of the base and has secured thereto a handle 28 to facilitate the handling of the extinguiser.

member of the watertight duplex receptacle hereinbefore referred to. This can is provided with a thin tin bottom 32 and with a reduced threaded neck 33 in the approximate center of which bottom there is formed aseat 34 to receive the stem 35 of a crow foot 35a. By the word can we mean a receptacle made of any suitable material, and althoughin the present illustration of our invention this can is shown and described as made of sheet-metal, yet We do not limit ourselves to that material, and wish it tofbe clearly understood that this receptacle 31 is to be made of any other material, whenever the circumstances indicate that the use of another material would be preferable to sheet-metal.

36 designates a bottle having a reduced neck 37 in which there is fitted a plate 38 arranged to support a seal 39. The can is secured in place by having its reduced neck threaded into the holder 21.

In the portion of the can not occupied by the bottle there is placed a quantity of b1- carbonate of soda and in the bottle there is placed a quantity of sulfuric acid. It will 'thus be seen that both the bottle and the bicarbonate of soda arey sealed within said watertight can.

In Fig. 4 the extinguisher is shown fully charged and in condition for use. The practical operation of the device is as follows:

The extinguisher is grasped by the handle 28 and inverted, the operator then strikes the knob 20 upon the ground or floor Which causes a movement of the stem 19 which movement presses the acid containing body against the crow foot, which breaks the bottle and drops the bicarbonate of soda (which the bottle had previously held against the force of gravity) into the sulfuric acid; this movement of the stem 19 also moves the thin tin bottom of the can to engage with the cutters 30, thus forming openings in the can for the discharge of the carbonio acid gas resulting from the combination of bicarbonate of soda and sulfuric acid.

When the extinguisher is in this inverted position the fire extinguishing fluid is moved by gravity to a position uncovering -the openings formed in the thin tin bottom. The movement of the stem 19 also causes the collar 23 to engage the end of the plug 15 and break it at its reduced neck portion, the dropping of the bicarbonate of soda into the sulfuric acid causing instantaneous pressure Within the extinguisher body. The

extinguisher is then ready for use and the verse construction, that is means for dropthat the sulfuric acid and soda are combined to produce the expelling gas.

We claim:

l. In a fire-extinguisher, a container, a breakable sealed nozzle for said container, a yielding support within said container', a sealed watertight duplex receptacle within said container and connected to said'supportl land having sealed within it separate inert substances, means movable with said support for breaking the seal of saidnozzle, means lying in the path of movement of said duplex receptacle for uniting said inert substances, and means lying in the path of said receptacle for establishingv communication between said receptacle and said container. 2. In a lire extinguisher, a container having a removable closure, a breakable sealed nozzle carried by said closure, a yieldingly mounted stem operating through said closure arranged to engage said nozzle when moved, a receptacle for an expelling agency secured to and movable with said stem, and means in the path of movement of said receptacle for establishing a communication between said receptacle and said container when said stem is moved.

3. In a lire extinguisher, a support Within said extinguisher, a hermetically sealed can arranged for detachable connection With said support, an alkali and a bottle Within said can, and a bottle breaking element within said can. I

4. In'combination with a re extinguisher arranged to contain a fire extinguishing substance and a support Within said fire extinguisher, a device, designed for use as an expelling agent for said extinguishing substance, comprising a hermetically sealed receptacle, means carried by said receptacle for detachable connection with said support,`an alkali and a frangible element within said receptacle, and means in said receptacle for breaking said frangible element.

5. In a lire-extinguisher, a suitable tank or container, a cap threaded to one end of said container and having upon its upper surface two diametrically-opposite ribs,one of which is provided with a bore communicating with they interior of said tank during active use of the fire-extinguisher, a nozzle in said bore, and suitable means Within said tank for ejecting a liquid through said bore and said nozzle.

6. As a new article of manufacture, a charging-can, for chemical fire extinguishers, comprisinga sheet-metal can containing a bottle of acid and a quantity of dry substance which' is separate from said acid Athe bottle, means withinand adapted toibe dropped into sad'aeid when said bottle is broken, combination with a bottle-breaking element also located within said charging-can, and screw threads at one end of said can for detachably securing it to a support furnished therefor in a fire extinguisher.

7. A charging element for chemical fire extinguishers, comprising a quantity of liquid and a quantity of dry substance, a separate container for each, the one container arranged to hold the one substance as well as the container for the ,other substance, means carried by the outer container for detachably connecting it with a support furnished therefor in a irev extinguisher and means, within the outer container, for destroying the inner container when impacted.

8. A charging element for chemical fireA extinguishers, comprising a suitable re ceptaele,.a quantity of dry substance in'. the said receptacle, a frangible bottle Within the receptacle, a quantity of liquid within the receptacle for breaking the bottle when the receptacle is impacted, and means carried by the\ receptacle for detachably securing it to a support furnished therefor in a fire extinguisher.

9. A chemical lire apparatus comprising a tank, two non-communicating containers supported in said tank one above the other, a breakable closure for one of said containers, a breakable partition between Said containers, and manipulative means for breaking said closure yand said partition whereby the contents of said containers areJ brought together to form a gas for the purpose of producing a pressure uponthe liquid contained in said tank.

In testimony whereof, we have signed our names to this specification, in presence of two subscribing witnesses.

EDWARD SCHAEFER. OSCAR J. HOLMES. Witnesses: E. L. WALLACE,

N. G. BUTLER.

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