US626988A - douglas - Google Patents

Description

No. 626,988. Y Patented lune I3, |899. W. H. DOUGLAS.

CHEMICAL `FIRE EXTINGUISHER.

(Application flied Oct. 20, 1898.)

(N0 Model.)

y// 'm-yz/lf/lll//l/ll/lffl/% y/ a C216 E af.

Tn: Norms persas co, 01am-Ho.. wAsHmGraN, u, c.

lUNTTnn STATES PATENT Trice.

l/VILLIAM II. DOUGLAS, OF IMASI-IING'ION, DISTRICT OF COLUMBIA, ASSIGNOR OF ELEVEN-TW'ENTIETHS TO WILLIAM I'I. BECK, OF SAME PLACE..

CHEMICAL FIRE-ExTlNeuIsi-IER.

SPECIFICATION forming part of Letters Patent No. 626,988, dated June 13, 1899. Application filed October 20, 1898. Serial No. 694,152. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM H. DOUGLAS, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Chemical Fire-Extinguishers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class of portable hre-extinguishers comprising a main reservoir containing a liquid which when combined with a proper acid held in a normallysealed bottle contained within said reservoir forms a fluid which will most quickly extinguish fires, said acid being liberated automatically when the apparatus is inverted; and the object of the invention is to provide a most simple and cheap means for sealing the acid-bottle, which is operated by gravity to liberate the acid when the apparatus is inverted, which will'cause the acid tomix slowly with the solution in the main receptacle, thereby overcoming the danger of explosion incident to constructions wherein there is a high pressure within the main receptacle created instantaneously by the rapid union of the acid with the alkaline solution; and to this end my invention consists in the parts and combinations of parts hereinafter shown and described, andmore particularly pointed out in the claims.

Referring to the drawings, Figure lis a vertical section of the apparatus in its normal position. Fig. 2 is a detail plan view. Fig. 3 is a vertical section ofone-half of the apparatus, showing the same inverted for use. Fig. 4 is a detail perspective View of the acid-bottle and its plug separated; and Fig. 5, a detailed vertical sectional View of the bottle, showing a modification.

Similar letters refer to similar parts throughout the several views.

The reservoir A is preferably made of metal of such thickness as to withstand the great pressure exerted thereon by the gases generated by the mixing of the acid contained in the bottle B with the chemical solution contained in the reservoir. The neck surrounding the opening in the reservoir is screwarranged a flexible washer b, resting on a shoulder c, formed on the cap, which is adapted to engage the rim or edge of the neck of the reservoir in order toforin an air-tight joint between the cap and the reservoir.. The washer b is made sufciently wide to engage the lugs formed on the acid-bottle, as will be hereinafter described, for the purpose of holding the latter firmly in position in the reservoir. Vithin the neck of the reservoir an inwardly-projecting flange F is formed, on which is supported the acid-bottle B, and between which iiange and the washer b the lugs d of the bottle B are held. The bottle is of sufficientlyless diameter than the mouth or opening in the reservoir to provide a space t' elbow-joint has connected thereto in any desired manner a flexible tube Z, which is to be provided with any desired or suitable nozzle for discharging the fluid from the reservoir when the apparatus is being used.

The acid-bottle B is preferably made of glass and is formed withlugs d, which are arranged, preferably, at equal distance apart around and project bothV laterally and vertically from the upper end of the bottle. These lugs serve the double purpose of engaging the flange F of the reservoir in order to support the bottle therein and also to prevent the latter dropping or moving when the apparatus is inverted, and they are arranged as described for the purpose of permitting of the free passage of the fluid between them to mix with the acid escaping from the'bottle, as will now be described.

The plug for the bottle B is formed with a ange e, adapted to rest closely on the top or ICO rim of said bottle, and its bodyfis formed of l a hollow cylinder whose diameter is such that mouth or opening in the bottle, into which it 'extends in order to form a vent for the acidbottle when the apparatus is inverted, as shown best in Fig. 3, and thus enable the acid to flow more freely through the series of openings or perforations h, formed around the cylindrical body of the plug at a point adjacent the flange e. Thus it Will be observed upon inverting the apparatus the plug will drop until arrested by the cap, as shown in Fig. 3,

in which position the perforations h are un-` covered and the acid in the bottle flows .or escapes therethrough in order to meet and mix with the fluid inthe reservoir, the latter flowing freely through the space between the opening in the reservoir and the body of the bottle B.

Owing to the space or passage g the bottle B is vented andthe steady and uniform flow of acid therefrom is thereby attained.

It is evident that the washerj may be dispensed with and shoulder c on. the cap enlarged to engage the lugs d, or that the latter may be made longer, so as to engage the cap itself without departing from the scope of my invention, and therefore I do not desire to be limited to the exact construction of the parts named as herein described and shown. Also it is evident that the body of the plug may be formed with the lugs fn', and a plug o, having discharge-openings p, is provided therefor.

Having thus described my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. The combination in a chemical fire-extinguisher, of an alkali-reservoir, an acidbottle having a vent and immovably mounted with reference to said reservoir, and a movable plug for said bottle provided with discharge-openings and'adapted to close and disclose said vent according to the position of the plug.

2. The combination, in a chemical fire-extin guisher, of a bottle, a plug having a hollow cylindrical body formed with openings and adapted to enter the mouth of said bottle so as to provide a vent-space thereabout, and a flange formed on said plug to support the sa me in position and to close said vent-space.

3. The combination, in a fire-extinguisher, of an alkali-reservoir f ormed with a flange in its mouth, an acid-bottle having lugs extending laterally from and projecting above the mouth of said bottle, and a cap for the mouth of the reservoir adapted to close the same and to engage the said lugs, whereby the bottle is held firmly in position.

4. The combination in a chemical fire-extinguisher, of an acid-bottle, and a plug for said bottle provided with discharge-openings and a flange, the said bottle having a vent situated contiguous to said flange and adapted to be closed thereby.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. DOUGLAS.

Witnesses:

HUGH M. STERLING, FRANK MONTGOMERY.

Images