| 摘要 |
An indicator device (D) comprises a base (10, 12) and a first indicator member (30) slidably mounted in a window (28) in the base between a first position indicative of a first condition or status of the device and a second position indicative of a second condition or status of the device. A releasable retention means, e.g. in the form of a pawl or catch (40), is mounted on the base, for retaining the first indicator member (28) in the first position and release means (48) are operable from outside the base for releasing the retention means, wherein the first indicator member (30) moves toward the second position on the release of the retention means (40). A second indicator member (28) may also be slidably mounted in the window (28) and is movable manually from a concealed position to a deployed position in which it extends partly across the front face of the first indicator member (30) when in its second position, as an indication that the first indicator member (30) has been observed in its second position. |
