| 摘要 |
<p>An enclosure for a gas detector including an easily removable and replaceable battery holder (24) and a battery absence indicator. The enclosure includes a flat first side panel (12) adapted to be fastened to a ceiling, a second side panel (14) spaced from the first side panel (24) to contain the gas detecting apparatus and a sidewall closing between the edges of the side panels. A specifically configured opening (18) is provided to allow sound from an audio alarm to exit the enclosure. A cylindrical opening (32) in the second side panel (14) is configured to receive and retain a battery holder (24) through a cooperating bayonet type arrangement of radial protrusions (28) on the battery holder (24) and notches (30) in the sides of the cylindrical opening (32). One or more protrusions (28) may house a gas detection cell.</p> |
