Flash bulb ignited by percussion - with detonator comprising filiform anvil covered with red phosphorus, potassium chlorate, and zirconium, in a tube

摘要

The flash bulb has a transparent bulb filled with actinic combustible material and a gas reacting therewith, and a mechanical detonator consisting of a tube, of which one end is closed and the other is open and opens into the bulb; coaxially disposed in the tube is the filiform anvil being partially covered with a mass which is detonated by blows or shocks, containing red P, KC103, Zr, and a binder, the proportion by wt. of Zr being from 2/3 to 3 times the total (P + KC103).