US923076A - Chemical fire-extinguisher. - Google Patents

Description

G. W. RANKIN.` V OHEMIGAL FIRE -EKXTINGUISHER. APPLICATION HLBD sur. la. 1908` 923,076, 'Patented May 25, 1909.

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' yG. W.-RANKIN. GHEMIGAL FIRE EXTINGUISHBR.

APPLICATION IILED SEPT. 18. 1908.

928,076, Patented May 25, 1909.

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n No. 923,076.

To all whom it may concern:

i UNirED srArEs PATENT OEEIOE.

W. RANKIN, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO GLOBE FIRE APPARATUS COMPANY, oE'JERsEY errY, NEW JERSEY, A CORPORATION or NEw JERSEY.

CHEMICAL FIRE-EXTINGUISHER.

kBe it known that I, GEORGE W. RANKIN,

a citizen of the United States, residing atV JerseyCity, in the county of Hudson and State of New Jersey, havefinvented certain new and'useful Improvements in Chemical FireeExtinguishers, and vI do hereby declare the following to be ya-iiull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the same.

My invention relates to improvements yinv chemical fire extinguishers, operated by hand,-and the object of my invention is to produce a simple device oi this character, whereby gasy or water charged with gas may be directed upon the flames, and in which a mechanical yescape vent is provided.

With this object in view, my invention consistsfof the construction and combinations of claimed. y .n

In the accompanying drawings-Figure l parts as hereinafter described and c is a vertical cross section of a chemical iire extinguisher with my improvements applied thereto., Fig. 2 is a cross "section of the upper part'oi ya' modified form, the acid bottle having been inverted, and Fig. 3 is a cross section of the modied form, after the acid bottle yhas been inverted, and showing the parts inposition ready to deliver gas upon the ire.

a denotes the body oi' the 'lire extinguisher oi' the usual cylindrical form, having` an upywardly yprojecting screw-threaded extension l) at its top,r` on which is screwed the cap c.

kd represents the discharge hose, which is connected with a pipe f running nearly to the bottom of the body a.

To the cap c is secured by means of screws or otherwise, the open frame g, consisting of two upright rpieces connected together by a cross piece at the bottom. In these upright pieces, is kp'ivotally mounted the frame Vfor carrying the acid bottle,` the lower part of which is rectangular in shape, and three of the sides of which extendabout half way up the bottle It. The part i. of the lrame is made of resilient material, so that the bottle may be easily' inserted or removed, and the part of the frame extends nearly the full length oi the bottley and terminates in a curved weight 7c, which partially encircles the neck of the bottle. f'llie' parts are so arranged that the yweight lowill turn the bottle down, as shown Specification of Letters Patent.

Patented May 25, 1909.

Application filed September 18, 1908. Serial No. 453,661.

in Fig. 2, when it is desired to use the apparatus.

The cap c is provided with a downwardly projecting central extension m, closed by a stumng nut n, suitable packing being provided and through this extension runs a rod o, which is provided with a metal cap p on its lower end, having a soit packing g which is adapted to engage with and close the upper end of the bottle when it is in its upright position, as shown in Fig. l.

To the upper end of the rod o is attached a horizontal arm r, extending in both directions from said rod, and the ends of this rod r are adapted to engage with, or be disengaged from bent stops s, projecting upwardly from the cap c, one or more of which stops may be used.

The upper part oi' the rod o is perforated, as shown at t. The perforation passes centrally down through the tube for a certain distance, and then out through its side, as shown in Fig. 1, terminating in a horizontal perforation u. The parts are so proportioned that when the rod o is pressed down wardly so that the packing g will engage the top ol' the bottle, as shown in Fig. l, the perforation u will be below the extension m, thus allowing a free escape lor the gas or air. rlhis mechanical escape vent passing through the pull device, which is operated to set the .machine in operation, is of great importance.

In the position shown in Fig. l, it permits air to pass freely in and out of the body c, which thereby prevents siphoning. This overcomes a great fault which is incident to siphon extinguishers which do not allow for the expansion of air. No discharge means are provided in such extinguishers except through the outlet hose d. To prevent leaking, stop valves are sometimes put on the end of the hose, but even under this condition, the hose is filled with water nearly all the time, which rots the hose and corrodes the stop valve so that it cannot be relied upon. to operate easily when needed.. Some manufacturers advise the water to be put in the extinguisher at a temperature of 90 or 950 F., as the water is then not likely to absorb any more heat, but after the water cools, this does not prevent siphoning in the apparatus. In my device, the inside opening u is closed when the machine is operated, by being pulled up into the stufling box. A double protection is offered against the escape of gas through the cap, because the top of the metal casing p is pulled up against the stuffing box, thereby forming a tight seal. A still further use of this gas vent is that it acts as a safety valve after the machine has been in operation, in which case the rod o is pushed down. and confined in the position shown in Fig. l. The interior of the body a is then in connection with the atmosphere, and any gas which may be in the body (L is permitted to escape, thus protecting the operator i'romi injury which might be caused by unscrewing the cap while there is still gas pressure in the apparatus.

An advantage of my construction is that it is only necessary to move a single part, the rod o, to start the evolution of gas. Thus there is practically no difliculty due to corrosion, and if the operator i'ails to pull the rod 0 up far enough, the pressure ol' the gas generated Will `force the part p tightly against the extension m.

Instead of using a hose, as shown in Fig. l, a revoluble discharge nozzle o, as shown in Figs. 2 and 3 may be used. This nozzle is bent and its inner end is provided with a stuiling box and is in coinniui'iication with the pipef. The nozzle o is bent and is provided with a handle w, so that it may be rotated, as desired. A further advantage ol this construction is that the escape valve can be used as a nozzle to direct gas, unmixed with water, upon a ilame. The parts being in the position shown in Fig. 3, and the body a being held nearly vertical, the operator puts his finger over the outlet end of the noz zle o, and the gas generated in the machine issues unmixed with Water through the perioration t. It often happens that it is very desirous in small ires to use gas alone. Thus where expensive curtains, draperies, paintl ings, bric-a-brac, etc. would be ruined or in- `iured by having Water thrown upon them, the iire may oftentimes be put out by the use of gas alone, without injury.

I claim:-

1. In a iire extinguisher, the combination of the body, an acid bottle pivotally supported therein, and a pull rod ior normally closing the top of said bottle,said pull rod having an aperture leading from the interior of the body to the air when the pull rod engages with the top oi the bottle, substantially as described.

2. In a fire extinguisher, the combination of a body, a cap secured to said body, an acid bottle pivotally supported by said cap, and a perforated pull rod adapted to slide through said cap and to have its lower end engage with the top of said acid bottle, substantially as described.

3. In a nre extinguisher, the combination ol' a body, a discharge hose, a pipe communieating with said hose, a cap screwed to the top of said body, said cap being provided with curved retaining means, a v[rame secured to said cap and extending downwardly into said body, a weighted frame mounted in said 'first named irame i'or carrying an acid bottle, and a perforated pull rod passing downwardlj,Y through said top, and provided with means i'or engaging the retaining means on said cap, and having at its lower end a metal plate provided with packing adapted to engage the top oi the acid bottle, substantially as described.

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

GEORGE lV. RANKIN.

Wvitnesses z WVM. AUGUSTUS HOLT, JAMES J. BUELL.

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