US2340047A - Flare gun - Google Patents

Description

Jan. 25, 1944.

A. c. DUNN FLARE GUN Filed Aug. 20, 1941 INVENTOR. rzdrew 61$ ATTORNEY.

itented Jan. 25, 1944 uuirso STATES FLARE GUN Andrew C. D'unn, Chicago, Ill.

Application August 20, 19

Claims.

This invention relates to flare guns and more iarticularly to a gun for firing flares or the: ike by impact of the gun against a solid surface.

One of the objects of the invention is to prolide a gun of this character in which the proiectile is yieldingly held in the barrel against unintentional displacement during handling of the gun to produce impact.

Another object of the invention is to provide a gun of this character in which jamming of the projectile or a portion thereof within the gun is prevented.

These objects and other objects, advantages and novel features of the invention will be apparent from the following description of the embodiment shown in the accompanying drawing, in which:

Figure l is a side elevation with parts in section of a gun embodying the invention;

Figure 2 is an end view of the gun, from the bottom of Figure 1;

Figure 3 is a top plan view of sembly;

Figure 4 bly; and

Figure 5 is a sectional view of one type of projectile for use with the gun.

As shown, the gun comprises an elongated cylindrical barrel Ill, open at one end and closed at its opposite end by a cap to the barrel. The cap it may carrymetal strips 14 for receiving a strap or the like, by which the gun may be carried. The cap 12 supports at the end of the gun barrel 2. firing pin assembly comprising a plate l6 fitting over the end of the gun and having a plurality of spaced circumferential guide flanges l8 lying within the gun adjacent the side wall of the barrel. The guide flanges B8 are tapered upwardly to provide an inverted conical surface for a purpose which will appear hereinafter. Between the flanges Hi, there are provided a plurality ofleaf springs 20 extending axially of the barrel and bowed inwardly intermediate the ends. As best seen in Figures 1 and 4, the leaf springs extend beyond the guide flanges with their minimum diameter just below the upper edge of the guide flanges. The leaf springs are secured to the plate l6 by asecond plate 22, held in place by afiring pin 24, which is swaged or otherwise secured to the plate l6.

Figure looking the firing pin asis a section of the firing pin assem- 5 illustrates one type of flare for use with the gun as comprising an outercylindrical shell 26 of a size to slip into the barrel l0, and

closed at its lower end by a cap 28. The cap is l2, screw-threaded 41, Serial No. M17551 hollowed out on its lower surface to receive a charge of powder, indicated at 30, which is held in place by a shell 32, fitting ,over' the closure 28'. A detonator cap 34 is carried by the shell32 to fire thepowder charge 30. A second powder charge 3t is placed above the cap 28, within theshell 26, and communicates with thepowder charge 36 through a passage 38, forming a time fuse. A wad 4% above thepowder charge 36 supports aflare 42, having a fuse 44 extending through a central opening in the wad and connected at its upper end to a parachute 46, held in the shell by a friction cap it.

In operating the gun, a flare cartridge is dropped into the open end of the barrel and falls downwardly therein until thesprings 20 engage its lower portion. These springs yieldingly grip the cartridge and sup-port it above the firing pin, yieldingly holding it against movement in either direction. With a cartridge inthe barrel, the gun may be brought down forcibly against the ground, so that the momentum of the cartridge will force it past thesprings 20 and force thedetonator cap 36 against thefiring pin 24 with sufficient impact to fire the detonator cap. operation ignites thepowder charge 30, and at the same time ignites the time fuse mechanism 38, the powder charge 3%) exploding with sufficient force to blow the shell 32 from the end of the fiare and to force the flare out through the barrel. After the flare travels upwardly a suflicient time for the time fuse mechanism 38 to function, the charge 35 will be ignited to blow the flare and parachute from the end of theshell 26. At the same time, the flare will be ignited and will float down on the parachute.

The shell 32 which is left in the gun will be prevented from jamming or sticking in the lower end thereof by the tapered guide surfaces l8, so that it may be removed from the gun simply by inverting the barrel. It will be noted that this surface is so arranged with respect to thesprings 20 that the shell can be removed from the gun without being held therein by the springs.

While the gun has been particularly described with reference to flares, it will be understood that various other types of projectiles might be fired therefrom, and that various changes in the structure as shown in the drawing might be made without departing from the spirit of the invention. Reference will therefore be had to the appended claims to determine the scope of the invention.

What is claimed is:

1. A gun for firing flares or the like comprising a barrel closed at one end, a firing pin carried by the closed end of the barrel, and a leaf spring 3. A gun for above the firing pin.

4. A gun for firing flares or the like comprising a barrel closed at one end, a. firing pin c: ried by the closed end of the barrel, guide mea around the firing pin forming an outwarc yieldingly to su]; the firing pin. flares or the like compris port a projectile above 5. A gun for firing means for securing said firing pin assembly in place on the barrel.

ANDREW C. DUNN.

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