US2074648A - Fire extinguisher - Google Patents

Description

Filed Dec. 5, 1935 Patented Mar. 23, 1937 2,074,648 PATENT OFFICE FIRE EXTINGUISHER Emmerich Haimann, Atlgersdori, Vienna, Austria, assignor oi one-hall to Impa Importund Versand-Gesellschaft in. b. 11., Stuttgart, Germany, a company of Germany Application December 5, 1935, Serial No. 53,068- In Austria December 11, 1934 Claims.

This invention relates to a fire. extinguisher provided with a casing which is adapted to be readily demolished by interior overpressure and in which a fire extinguishing substance is ar- 5 ranged around an explosive charge, adapted to be exploded by the heat of the fire. In these known fire extinguishers, the explosive charge is embedded in a tube made of a readily inflammable material and together with the tube the said explosive charge is arranged separate from the fire extinguishing substance in a centrally disposed channel of the receptacle containing the fire extinguishing substance. This arrangement possesses the drawback, that the whole force of explosion does not act on the fire extinguishing substance in view of the channeloutlet released by burning down of the ignition tube and of the resistance of the tube-wall, so that by an explosion, the receptacle containing the fire extinguishing substance is ripped open in most cases at one side only but it is not destroyed entirely.

This drawback of the known fire-extinguishers is avoided according to the present invention in that a container for the explosive charge is pushed onto a supporting rod passing through the casing containing the fire extinguishing substance and onto a tube, containing the fuse and arranged parallel at the side of said rod and both sides of which pass outward, said container being surrounded directly by the fire extinguishing substance and being provided with a priming cap, which is in communication with the fuse passing out through a lateral opening of the tube. Further the fire extinguisher according to the present invention is furnished with a tearing fuse, which is timed accordingly and causes ignition at the proper moment. Compared with the known fire extinguishers, the fire extinguisher according to the present invention possesses the feature of an improved security of ignition and causes a complete utilization of the efiect of the explosion of the explosive charge.

A fire extinguisher of this kind can be charged 45 with any suitable mixture of fire extinguishing substance and powder, adapted to the kind'of fire to be extinguished.

Two modes of carrying out the present invention are illustrated by way of example on the accompanying sheet of drawing in which Fig. 1 is a view of the fire extinguisher in longitudinal section. Fig. 2 shows the explosive charge in cross section. Fig. 3 shows the connection of the supporting rod with the handle. Fig. 4 is 55 a modified construction of the explosive charge receptacle.

The fire extinguisher consists of cardboard or the like, which contains a suitable quantity of the fire extinguishing substance I and by means of 60 a supporting rod 2 is firmly connected with a handle 3 and is provided with an explosive charge 5. A clamping cap 6, I is arranged at the top and bottom of the receptacle I containing the fire extinguishing substance, said caps tightly enclose the borders of the openings of the receptacle I at the inside and outside thereof. These clamping caps 6, 1 are pressed against the borders of the openings of the receptacle by spring washers 8 of the handle 3 and of a headed screw 9, screwed into the rod, so that the fire extinguishing substance I is tightly enclosed in the receptacle I. The explosive charge 5 is arranged in a sleeve II), which is longitudinally slidable on the rod 2 and on a tube II-, consisting of cardboard, celluloid or the like and containing the fuse. The tube II is fixed in both clamping caps 6 and I and one end of the same projects out of the top of the receptacle I. An ignition tape II of highly nitrated material is arranged on the outwardly extending end of the tube and is ignited by the flames at the place of confiagration. This ignition tape I2 ignites a highly nitrated yarn l3, which is arranged in the tube I I and attached to a priming cap I4, consisting for instance of a compressed priming composition and disposed in the explosive charge 5; said tube II being provided at a convenient place with a lateral hole I5 through which said yarn passes. The end of the yarn I3 is fixed within the range of the ignitilon tape I2 by means of a readily inflammable P However the fire extinguisher may be exploded by means of a tearing fuse. For this object, the bottom end of the tube II is provided with a cap I6 containing the tearing fuse, the free end of a stringv I! connected with the cap I6 being furnished with a ring I8, and the latter together with the wound up string is arranged in a recess I9 of the handle 3. The recess I9 is covered by a slide 20, mounted adjustably on the handle 3 and provided with a recess 2|, which when suitably adjusting the slide uncovers the recess I9, so that the ring I8 can be taken out for tearing the string.

The tearing fuse I6 is provided preferably with a time fuse 22, inserted in the tube II and connected with the priming cap I 4 of the explosive charge 4 by means of a highly nitrated yarn 23. Therefore according to the scene of confiagration, the fire extinguisher can be exploded either by means of the tearing fuse set to time ignition 'before being thrown into the fire or by self-ignition of the ignition tape I2, secured to the tube II after the fire extinguisher has been thrown sleeve I is axially adjustable on the rod 2 and the fuses I3 and 23 are maintained in a suitably slack condition. Thereby, before charging the receptacle I containing the fire extinguishing substance, it is possible to set the sleeve I 0 either to the middle of the receptacle I or to the upper or lower part thereof. If the sleeve is set in the middle of the receptacle I as shown in Fig. 1, the fire extinguishing substance will be distributed sideways as well as upwardly and downwardly.

If the sleeve I0 is pushed down the rod, so that it rests on or near the clamping cap I, the fire extinguishing substance will be distributed upward and to some extent sideways, while if the sleeve I 0 is pushed up the rod 2 into the top part of the receptacle I, the fire extinguishing substance will be distributeddownward and to some extent sideways. In the two cases last mentioned, the tube II is provided near the bottom end and top end respectively with lateral holes I5 through which the yarns I3 and 23 pass. It is of particular advantage, that the clamping caps 6 and I of the receptacle I containing the fire extinguishing substance consist of cardboard or 25 the like and are pulled away from the rod 2 together with the walls of said receptacle, so that the fire extinguishing substance can be readily spread in the desired direction over the scene of confiagration.

In order to improve the effect of the conical distribution, the explosive charge may be arranged in a sleeve, which is conically flared and open at the top and which is arranged in the top or in the bottom part of the receptacle containing the fire extinguishing substance in such a manner, that its outlet faces always the fire extinguishing charge. In this way it is possible to produce a distribution in a certain direction.

A small plate 25, mounted in a gap of the handle 3 and securing the rod 2 and thus the receptacle I containing the fire extinguishing charge against rotation with respect to the handle 3, is arranged at the end of the rod 2 in order to provide for a firm grip. The small plate 25 is fixed in the handle by means of one or two safety pins 21 and the part of this plate projecting beyond the handle is provided with an eyelet 26 by which the fire extinguisher may be suspended from a long fire hook. In order to protect the ignition tape I2, the upper clamping cap 6 is covered. by a protecting cap 24, which is secured easily removable on the receptacle I by means of a glue tape and which is removed before throwing the fire extinguisher.

What I claim is-- 1. Fire extinguisher comprising in combination a receptacle containing a fire extinguishing charge, a supporting rod passing through said receptacle, a tubular member disposed in the receptacle at the side of said rod and both ends of which pass outside, an explosive charge container pushed onto said member and said rod and surrounded by said fire extinguishing charge, a priming cap disposed in said explosive charge, a lateral hole in said tubular member and a fuse arranged in said tubular member and passing through said hole and connected with said priming cap.

2. Fire extinguisher comprising in combination a receptacle containing a fire extinguishing charge, a supporting rod passing through said receptacle,,a tubular member disposed in the receptacle at the side of said rod and both ends of which pass outside, an explosive charge container pushed onto said member and said rod and surrounded by said fire extinguishing charge, a priming cap disposed in said explosive charge, a lateral hole in said tubular member, a fuse arranged in said tubular member and passing through said hole and connected with said priming cap, and a suitably timed tearing fuse arranged in'said tubular member and attached to said priming cap.

3. Fire extinguisher comprising in combination a receptacle containing a fire extinguishing charge, a supporting rod'passing through said receptacle, a tubular member disposed in the receptacle at the side of said rod and both'ends of which pass outside, an explosive charge container pushed onto said member and said rod and surrounded by said fire extinguishing charge,'a priming cap disposed in said explosive charge, a lateral hole in said tubular member, a fuse arranged in said tubular member and passing through said hole and connected with said priming cap, a suitably timed tearing fuse arranged in the tubular member and attached to said priming cap,'a handle on which the receptacle containing the fire extinguishing charge is mounted, a recess in said handle, a tearing string secured to said tearing fuse and located in said recess, and a slide mounted on said handle and adapted to cover and uncover said recess.

4. Fire extinguisher comprising in combination a receptacle containing a fire extinguishing charge, a supporting rod passing through said receptacle, a tubular member disposed in the receptacle at the side of said rod and both ends of which pass outside, an explosive charge con tainer pushed onto said member and said rod and surrounded by said fire extinguishing charge, a priming cap disposed in said explosive charge, a lateral hole in said tubular member, a fuse arranged in said tubular member and passing through said hole and connected with said priming cap, a suitably timed tearing fuse arranged in the tubular member and attached to said prim:

ing cap, a handle on which the receptacle containing the fire extinguishing charge is mounted, a recess in said handle, a tearing string secured to said tearing fuse and located in said recess, a slide on said handle and adapted to cover and uncover said recess, an axially disposed plate secured to one end of said rod and extending beyond the end of said handle, pins securing said plate to said handle, and an eyelet arranged on said plate for suspending the fire extinguisher.

5. Fire extinguisher comprising in combination a receptacle containing a fire extinguishing charge, a supporting rod passing through said receptacle, a tubular member disposed in the receptacle at the side of said rod and both ends of which pass outside, an explosive charge container conically flared and open at the outlet and slidably mounted on said member and said rod and surrounded by said fire extinguishing charge, a priming cap disposed in said explosive charge, a lateral hole in said tubular member, and a fuse arranged in said tubular member and passing through said hole and connected with said'priming cap.

EMMERICH HAllVIANN.

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