US2399556A - Fire extinguisher - Google Patents

Description

April 30, 1946.. J. K. LUMBAR FIRE EXTINGUISHER Filed March 11, 1944 H6 7 4 H w/Uv a z 8 z w 4 Inventor Jrmes K Lum bar Patented Apr. 30, 1946 UNITED STATES This invention relates to new and useful improvements in fire extinguishers.

The principal object of the present invention is to provide a fire extinguisher which will act instantaneously at a certain temperature to discharge a fine spray of a fire smothering substance, such as carbon tetrachloride.

Another important object of the invention is to provide a fire extinguisher unit for installation in high pressure extinguishing systems employing a chemical fire extinguishing fluid, which in operation will serve to vent the high pressure line at a point of high pressure in a quick and effective manner.

These and other important objects and advantages of the invention will become apparent to the reader of the following description.

In the drawing- Figure 1 represents a front elevational view of the extinguisher.

Figure 2 is a side elevational view.

Figure 3 is a fragmentary vertical sectional view through the lower portion of the extinguisher. I

Figure 4 is a section on the line 4-4 of Figure 1.

Referring to the drawing wherein like numerals designate like parts, ltcan be seen that the unit is to be installed in a high pressure pipe line containing carbon tetrachloride under pressure and in this conjunction a. threaded T-iltting 5 is interposed in the pipe line (not shown), this fitting having a depending threaded portion a which is threadedly disposed downwardly through an opening in a cover plate 5 which is secured to a shell 1, forming part of the present invention, the cover being secured in place by machine screws 8.

The lower portion of the shell l is grooved as at t, the lower flange portion it! being interrupted by slots ll through which lugs l2 on the upper end of a glass bowl l3 can be disposed after which the bowl is rotated to properly support the bowl in place, and as can be seen in Figure 3, a suitable gasket I4 is provided. However, it is to be understood that other means for securing the bowl l3 in place may be provided.

The inside of the shell I has an inwardly disposed shoulder l5 from which depends a tube ii, the same being open at its lower end. In the lower end portion of the tube It is a spider ll from which a leg it depends and supports a chemical spreader It, the peripheral portion of this spreader being beveled and being in close spaced relation with the lower end of the tube l6.

This device has a hammer for breaking the Mil-29) bowl it and this consists of a swingable arm it provided with a head ill at its free end. The arm it is pivoted as at it on the cover t and a spring it is employed for driving the arm downwardly, when released, in order that the head it will strike and break the bowl it.

An apertured car it is provided on the arm to adjacent the head it, and an eye it is secured as at it on the cover it. Here it will be noted that numeral ii is a fusible link connecting the car it with the eye it and wires it and it may extend therefrom to suitable indicating or alarm means for warning inhabitants of a building or home that a particular extinguishing unit has operated. The link ill may be of any suitable material and set to melt at approximately 165 Fahrenheit.

It can now be seen, that when the element it fuses, the arm ill will be released and the head it in being carried downwardly in response to the force of the spring it will strike and break the bowl it, thus liberating the carbon tetrachloride, which in passing between the lower end of the tube it and the spreader it will emanate in aflne mist, covering and smothering the adjacent fire.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope ofthe invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

l. A fire extinguisher comprising a hollow body, a fragile bowl depending from the body, said bowl containing a fire extinguishing fluid, a tube depending from said body into the bowl, and a disc depending from said tube and forming together with the lower end of the tube a spreader enclosed by said bowl, and heat responsive means for breaking the fragile bowl.

2. A fire extinguisher comprising a hollow body, a fragile bowl depending from the body, said bowl containing a fire extinguishing fluld, and heat responsive means for breaking the fragile bowl,

said-means for breaking the bowl consisting of a swingable arm having a head, spring means for forcing the arm and head to break the bowl

Images