Patent ID: 8565469

Claim:
An apparatus comprising: an audio-annunciator housing configured to be mounted to a wall, wherein the audio-annunciator housing comprises: at least one arcuately-shaped track having an arcuate track length, the arcuately-shaped track including a pair of arcuate track surfaces disposed on opposite sides of the track that extend along the arcuate track length; and a cover-attachment sensor; at least one snap interface; a cover-attachment assembly comprising: at least one arcuately-shaped guide surface having an arcuate guide surface length, the arcuately-shaped guide surface shaped, sized, and positioned to fit within the arcuately-shaped track between the arcuate track surfaces thereof, the arcuately shaped guide surface length configured to fit into the arcuate track length when pivotally attaching the cover-attachment assembly to the audio-annunciator housing; a cover-attachment sensor actuator that is configured to be sensed by the cover-attachment sensor when the arcuately shaped guide surface of the cover-attachment assembly is slidably pivoted betweeen the arcuate track surfaces of the auto-annunicator housing to indicate the cover attachment assembly is in the installed position; and at least one snap interface that is shaped, sized, and positioned to lockingly mate with the audio-annunciator housing snap interface to hold the cover-attachment assembly in an installed position with respect to the audio-annunciator housing.