| 摘要 |
An electrochemically operated device such as a portable lantern, with a waterproof housing enclosing at least one galvanic battery cell which evolves hydrogen gas, and a push button switch in the housing, a shiftable boot exposed to the housing exterior and aligned on the interior with the switch, a hydrogen recombination pellet in the housing, and a pellet retainer retaining the pellet, the housing including an elastomeric septum between its interior and exterior, having a sphincter orifice therethrough of a size to be elastomerically squeezed closed except under a predetermined pressure differential thereacross, to thereby prevent water entry to the housing, but to open to allow hydrogen gas escape from the housing at a pressure differential across the septum. The boot is resilient and the elastomeric septum preferably forms a part of the boot.
|
