Patent ID: 8032193

Claim:
A device comprising: a housing having at least a base part, a first cover part, and a second cover part; locking mechanisms configured to prevent the cover parts from being moved from respective retracted positions; said base part is provided with an operating face; said first cover part being mounted for slidable movement relative to base part between the respective retracted position in which it conceals a portion of operating face and an extended position in which it does not cover a portion of the operating face; said second cover part being mounted for slidable movement relative to base part between the respective retracted position in which it conceals a portion of the operating face and an extended position in which it does not cover a portion of the operating face; and at least one of said cover parts being configured to assume an intermediate position between said retracted position and said extended position in which a portion of said operating face is not concealed, where the locking mechanisms are further configured to prevent the at least one of said cover parts from being moved from the intermediate position; wherein the locking mechanisms are released so that the at least one of said cover parts is configured to sequentially move to the intermediate position in response to a first signal and to move to the extended position upon receipt of a second signal.