US2754913A

US2754913A - Fire extinguisher

Info

Publication number: US2754913A
Application number: US419968A
Authority: US
Inventors: Robert W Mcfarlin
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-03-31
Filing date: 1954-03-31
Publication date: 1956-07-17
Anticipated expiration: 1973-07-17

Description

July 17, 1956 R w, MCFARLIN 2,754,913

FIRE EXTINGUISHER Filed March 31, 1954 IN V EN TOR.

A TfdEA Y5 United States Patent FIRE EXTINGUISHER Robert W. McFarlin, Milwaukee, Wis.

Application March 31, 1954, Serial No. 419,968

6 Claims. (Cl. 169-28) This invention relates to a fire extinguisher.

A can of fire extinguishing fluid of any nature (carbon tetrachloride being an example) is provided with supporting means which, in the instant device, comprises a screw having its top spot welded to what is normally considered the bottom of the can so that the can may be suspended by threading the screw into an overhead support of any kind. It may, for example, be attached by the screw to the ceiling of a room in which a fire might start.

The can has a friction type cover within which are fastened one or more explosive charges such as may be provided by common fire crackers. The fuse or fuses of the fire crackers are led through an opening in the friction cap. Any convenient means, such as plastic adhesive, is used to position the explosive charge on the interior surface of the friction cap and to seal the fuse means to the exterior surface, while closing the hole through which the fuse extends.

In thecase of fire, the fuses are ignited to detonate the explosive charge, thereby blowing off the cap and widely distributing the fire extinguishing liquid.

In the drawings:

Fig. l is a view in perspective of an assembled fire extinguishing unit.

Fig. 2 is a detailed view in transverse section through the friction cap and can.

Fig. 3 is a perspective view of the cap showing the fire crackers attached to the inside thereof, portions of the plastic embedding material being broken away.

Fig. 4 is a view taken in cross section on the line 4-4 of Fig. 2.

The can 1 has a supporting screw 2 mounted to the closed can bottom 3 by spot welding or otherwise to provide means for suspending the can 1 from a ceiling or other overhead support.

The can has a conventional friction cap 4 detachably closing its otherwise open end to retain within the can a body 5 of fire extinguishing material which, for the purposes of the present disclosure may be assumed to be carbon tetrachloride.

The friction closure cap 4 of the can has an aperture at 6 through which fuse means 7 extends to one or more explosive charges which are here represented by ordinary fire crackers 8. A mass of plastic cement of any desired type is used at 9 to imbed the explosive charge or charges and to secure the explosive to the inner surface of the friction closure 4. In practice, I have used the material known commercially as liquid solder. A body 10 of the same material envelopes the fuses 7. It not only does not interfere with the ignition of the fuses, in the event of fire, but seems to facilitate ignition.

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When the fuses are ignited, the flame is speedily propagated to the explosive charge or charges 8. Since the closure 4 is held only by friction, the detonation of the explosive readily blows off the closure. At the same time the fire extinguishing contents of the can 1 are projected outwardly in a broad conical pattern.

The plastic material not only anchors the explosive charge and the fuse but also protects both against dampness. The apparatus will, therefore, remain effective indefinitely.

I claim:

1. A fire extinguisher comprising a container having fire controlling material therein, a removable bottom closure for the container with a friction fit to said container, an explosive charge within the container constituting means for dispersing such material and means extending through a portion of the container for detonating said charge, said charge, upon explosion, comprising means for releasing said friction fit and blowing said closure from said container for release of said fire controlling material through the open bottom of the container.

2. The device of claim 1 in which the charge has a fuse constituting the detonating means, the container having an aperture through which such fuse extends.

3. The device of claim 2 in which the charge and fuse are imbedded in a plastic protective coating.

4. The device of claim 3 in which the removable bottom closure is provided with said aperture and provides a mount for the explosive charge on its inner face and the fuse on its outer face.

5. A fire extinguisher comprising a container having a fire extinguishing liquid content and provided with a closure at one of its ends sealing said liquid content in the container, a support for the container connected therewith at its other end, an explosive charge mounted within the container and a fuse leading to said charge and for which the container is apertured and means sealing the aperture around the fuse, said sealing means completely enveloping the fuse and the explosive charge and fastening the fuse and the charge to the container closure, the said aperture being provided in the closure and the explosive charge being mounted on the inner face of the closure, the fuse being disposed on its outer face.

6. A fire extinguisher comprising the combination with a can having a permanent bottom at one end provided with a projecting screw and having a friction closure at its opposite end, of a fire extinguishing non-aqueous liquid within the container and retained by the closure, an explosive charge mounted on the inner face of the closure, a fuse mounted on the external face of the closure and extending through an aperture with which the closure is provided and a protective coating connecting the charge and the fuse to the closure and sealing the aperture in the closure, the ignition of the fuse being adapted to effect detonation of the charge to blow off the closure and distribute the liquid.

References Cited in the file of this patent UNITED STATES PATENTS 655,599 Braunwalder Aug. 7, 1900 1,297,172 Hughes Mar. 11, 1919 1,489,703 Johnson Apr. 8, 1924 2,057,840 Neumann Oct. 20, 1936

Claims

5. A FIRE EXTINGUISHER COMPRISING A CONTAINER HAVING A FIRE EXTINGUISHING LIQUID CONTENT AND PROVIDED WITH CLOSURE AT ONE OF ITS ENDS SEALING SAID LIQUID CONTENT IN THE CONTAINER, A SUPPORT FOR THE CONTAINER CONNECTED THEREWITH AT ITS OTHER END, AN EXPLOSIVE CHARGE MOUNTED WITHIN THE CONTAINER AND A FUSE LEADING TO SAID CHARGE AND FOR WHICH THE CONTAINER IS APERTURED AND MEANS SEALING THE APERTURE AROUND THE FUSE, SAID SEALING MEANS COMPLETELY ENVELOPING THE FUSE AND THE EXPLOSIVE CHARGE AND FASTENING THE FUSE AND THE CHARGE TO THE CONTAINER CLOSURE, THE SAID APERTURE BEING PROVIDED IN THE CLOSURE AND THE EXPLOSIVE CHARGE BEING MOUNTED ON THE INNER FACE OF THE CLOSURE, THE FUSE BEING DISPOSD ON ITS OUTER FACE.