Improvised frangible type (Obsolete)

Igniters

Filler

Gasoline and napalm

Description: These are improvised grenades made by simply filling a glass bottle with one of these chemical agents. They may or may not have an igniter, depending upon the filling that is used. If the filling is smoke or hydrocyanic acid, no igniter is required; but if the filling is one of the others mentioned above, and igniter is necessary.

Igniter M1: This is a plastic cylinder containing a chemical powder. It is used with grenades containing a mixture of gasoline and alcohol. When the glass container breaks against the target, the powder and liquid come in contact and ignite spontaneously.

Igniter M2: This is a paper cartridge, filled with powder, assembled to a pull-wire ig-niter. This igniter is taped to a frangible grenade filled with thickened gasoline. To ope-rate the igniter, pull the wire, lighting the powder.

Igniter M3: This is a simple fuze consisting of a spring-loaded firing pin and a blank cartridge contained in a cylinder, and a metal clamp to hold the cylinder against the frangible grenade. The clamp has a conical projection which, when the clamp is tightened around the safety pin which passes through the cylinder, also restrains the firing pin. When the grenade is used, the safety pin is removed and the grenade is thrown so as the smash against the target. When the bottle breaks, the tension on the clamp is relea-sed and the firing pin, driven by its spring, pushes the cone aside and strikes the primer of the cartridge. The flash from the cartridge ignites the grenade filler. This igniter is used with the napalm grenade.

Remarks: These frangible grenades are considered obsolete.

Figure 228. Frangible Grenade