| 摘要 |
A flashlamp in an enclosing envelope, such as a flashcube having a plastic cover, with a substance which will product a protuberance on said envelope as a result of the flash. In this way, a used flashlamp can be detected by the feel of the protuberance, without the operator's having to look at the lamp or cube itself. The substance can be a material which generates heat or explodes on being subjected to other heat or radiation. A mixture of potassium chlorate with lactose, or with sulfer can be used, or thermit or other suitable materials. An ignitor and an exothermic material, or a sugar with an oxidant can be used. |
