| abstract |
A percussion-ignitable type flashlamp is disclosed which includes an improved primer material that is more stable in handling during manufacture of the lamp and improves performance of the lamp in operation. Said primer material comprises a mixture in percentages by weight of 4-50 percent phosphorus, 3-8 percent potassium chlorate, 6-30 percent potassium perchlorate, and the remainder being titanium, which mixture can be bonded to form a unitary mass with a polyvinyl alcohol binder. A slurry of the primer material in an aqueous solution of 87-89 percent hydrolyzed polyvinyl alcohol remains substantially gel-free for long time periods and provides a tough and adherent coating in the lamp. |