US673383A - Chemical fire-extinguisher. - Google Patents

Description

No. 673,383. Patented May 7, |90I.

E. .1. clmpmvm.4 CHEMICAL FIRE EXTINGUISHER.

(Application Bled Dec. 24:x 1900.)

(No Model.)

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UNITED STATES PATENT OFFICE.

EDWARD J. CHAPMAN, OF MERRIMAC, MASSACHUSETTS.

CHEMICAL- FIRE-EXTINGUISHER.

SPECIFICATION forming part of Letters Patent No. 673,383, dated May?, 1901.

Application filed December 24, 1900. Serial No. 40,960. (No model.)

To all whom it may concern:

Be it known that I, EDWARD J. CHAPMAN, a citizen of the United States, residing at Merrimac, in the county of Essex and State of Massachusetts, have invented a new and useful Chemical Fire-Extinguisher, of which the following is a specification.

This invention relates to fire-extinguishers, and more particularly to chemical-mixing fire-extinguishers; and the object of the same is to provide a fire-extinguisher of this nature which is safe and reliable in use and will not explode, readily charged, discharged, and recharged Without injury to any part of the apparatus, and one having a simple au tomatic operation, a combined handle and discharge-nozzle, and means for preventing passage of the acid directly into the said nozzle and for preventing corrosion of the parts.

The invention consists in the construction Will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a perspective View of a fire-extinguisher embodying the features of the invention. nFig.12 is a transverse vertical section of the same. Fig. 3 is a detail perspective view of the acid-bottleholding cage With the bottle therein and the automatically-operating cap for the same. Fig. 4 is a sectional elevation of the parts shown by Fig. 3 in inverted position and the cap released from the neck or mouth of the bottle.

Similar numerals of reference are employed to indicate corresponding parts in the several views.

The numeral 1 designates the shell or casing, preferably constructed of the best hard cold-rolled copper, with the seams overlapped and closely riveted and sweated with a good quality of solder, the crown 2 and bottom 3 being spun into the shape shown and said crown having a cap 4 riveted and sweated thereto. All of the foregoing-named parts are fully coated with non-corrosive material to prevent injury thereto by the chemicals and conform in general construction and dimensions to the standard requirements of insurance companies.

To the bottom 3 a stand 5 is secured, and

comprises a plurality of supports 6, preferably formed of cast-brass and secured to the said bottom, at the joint thereof, by suitable rivets, the lower terminals of the supports being'apertured and having a round bar 7 passed therethrough and irmly fastened, the said bar forming a handle or convenient `means of gripping the bottom portion of the extinguisher when using the latter.

The cap 4 is annular and has an upper screw-threaded seat 8 to receive a plug 9, of suitable metal, preferably cast-brass,havinga central outlet-opening 10 with a screw-threaded wall. Immediately below the seat 8 the cap is formed with an inwardly-extending horizontal seat 11, on which is disposed an annular washer 12, directly under the screwthreaded joint of the plug with the cap, to prevent corroding by the chemicals or acids of the threads of said joint, another shoulder 13 being formed in the cap inwardly from and below the plane of the seat 11 for a purpose which will be presently set forth. The outer lower portion of the cap is offset at an outward angle, as at 14, to receive and have riveted thereto the upper terminal of the crown 2, the rivets 15 being arranged at an inward angle and upset against the bottom portion of the cap, as shown.

Within the opening 10 of the cap the lower tubular neck 16 of a combined handle and nozzle is securely fastened, first, by a single thread and then locked against movement by the insertion of a plurality of pins 17, one of the latter being shown in vdotted lines in Fig. 2, and after such insertion of the pins the joint is treated with lead to seal the same. The said neck unobstructedly communicates with a curved outlet-conduit 18, having a normal vertical direction and continuing into a reversely-curved nozzle extremity 19,With a forwardly projected terminal having a nozzletip 2O removably mounted therein. From the rear upper portion of the neck a curved grip 21 projects and merges into an upper horizontal enlarged portion 22, that connects with the conduit 18, and with the latter said grip forms a substantially elliptical hand-loop for transporting the extinguisher from one point to another and to conveniently direct the nozzle-tip when the entire device is tilted or oth- IOO . said shell.

being operated, and a steady stream can be obtained therefrom and directed to any point except those obviously dangerous positions Where an operator would not stand directly overhead or under foot. The conduit furnishes a free and clear outlet and prolongs the' stream or flow a greater length of time than in some previous machines using the same amount of uid. The nozzle-tip is detachable and non-corrosive, and the plug' 9 can be easily turned out when badly stuck by the insertion of a wrench or other suitable implement through the looped portion of the combined device.

The upper angular ends of a plurality of arms 23, forming a cage 24, are hung on the seat ll of the plug 9, and in the cage an acidbottle 25 is mounted and preferably of eightounce capacity and provided with an upper Wide outlet-neck 26, having a ground rim 27. Above the neck of the acid-bottle a hollow substantially spherical acid non-porous cup 28 is xed and has depending guards 29 to hold the bottle in place and against movement in the cage, and also extending downwardly from the center of the upper portion of the cup is a pin 30. Movably mounted in relation to and guided by the said pin is a lead cap 3l of solid hemispherical form and having a vertical opening 32 in the upper portion thereof, into which the pin extends. Extending transversely across the lower inserted portion of the neck 16 of the combined handle and nozzle is a guard 33, which keeps the cup from slipping from its place when operated, and between the said guard and the top of the cup a reticulated partition 34 is positioned and covers the outlet from the shell or casing to serve as a screen to prevent the crystals or foreign matter from passing into the discharge-conduit.

In the operation of the device the body or shell is tilted or turned atan angle, so that the cap 3l, which normally bears on the ground rim of the acid-bottle 25, moves olf from the said rim and permits the acid to mingle with the fluid that is placed in the By using a large neck bottle, as shown and set forth, a quick action can be secured and an excess of carbonio-acid gas generated and simultaneously injected with the liquid in the shell, the said liquid being a soda solution. The extinguishing liquid, composed of the soda solution and the acid from the bottle, becomes thoroughly formed before passing into the dischargeconduit,

and, as before indicated, said .conduit and its nozzle-tip will materially facilitate vthe direction of the liquid on the lire. After the service of the extinguisher is no longer needed it is righted and the cap gravitates to its normal position and again closes the bottle.

A non-corrosive material will be applied to all the parts Where necessary to protect them,

kand other minorincidentals will,y be supplied kaline liquid,a cap in said body with an opening therethrough, a plug removably mounted in said cap and having outlet means, a cage suspended from said cap and held in place by the plug, an acid-containing receptacle movably mounted in the cage with its outlet portion uppermost, an acid cup mounted above and rigidly held within and 'by the cage and provided with a central projecting portion, and a Weighted cap of solid form having a lower horizontal face to contact with the upper open portion-of said receptacle and having an upper opening to loosely receive the projection of the cup.

2. In achemical re-extinguisher, the combination of a body or shell for holding an alkaline liquid, an lacid-containing receptacle suspended or rhung from the interior top portion of the body or shell and provided with an upper wide open portion or outlet, an acid-cup mounted above and surrounding said upper open portion of the said receptacle and havinga depending pin, andaweighted cap of solid form having a lower horizontal face to contact `with the upper open portion of the receptacle, the said cap also having an upper opening to loosely receive the pin of the cup.

3. In achemicalfire-extinguisher, the combination of a body or shell for holding an alkaline liquid, a cage suspended from the upper inner portion thereof, an acid-'containing receptacle supported by the cage and having an upper outlet, a substantially hollow hemispherical acid-cup in the cage over the upper portion of the receptacle, a weighted cap movable in relation to and within the cup and having a flat face to loosely bear on the upper open portion of the receptacle, an outlet device at the top of the shell, a guard against which the cup indirectly bears to hold said cup in place in the cage, and a reticu- `lated partition between the guard and cage and the cup in the latter and the outlet device.

4:. A fire-extinguisher having an upper clos- IIO ing-plug with a combined `handle and nozzle In testimony that I claim the foregoing as connected thereto, the latter being in the my own I have hereto affixed my signature in form of a hand-loop With the front portion the presence of two Witnesses.

tubular and continued above into a. for- EDWARD J. CHAPMAN. 5 Wardly-ourved nozzle extremity, and a for- Witnesses:

Wardly-projecting nozzle in the upper termi- CHARLES W. CHAPMAN,

nal of said nozzle extremity. ALMENA G. CHENEY.

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