Visible signal for alarm, such as a smoke detector

A visible signal apparatus for an alarm device such as a smoke detector or the like which includes a frame, a cover, means releasably supporting the cover from the frame, and a removable battery mounted in an exposed position on the frame and supplying electrical power for the signal apparatus, said apparatus being characterized by said means comprising:

• means secured to the cover and releasably engaging said battery and providing sufficient of the support of the cover that the cover will not remain in place in the absence of that releasable engagement, whereby if said battery is absent said cover will not remain so supported thereby providing a visible indication of the absence of the battery.

A visible signal apparatus for an alarm device which includes a horn with a diaphragm member which is vibrated to produce an audible alarm signal, said apparatus being characterized by:

• a signal flag hingedly connected to said frame, said flag having a distal terminus spaced from the hinge connection to the frame, said flag being movable by gravity about said hinge connection between an upper position in juxtaposition to said member and a lower position away from said member;
• and
• means secured to the flag, spaced from the hinge connection and releasably engaging one of said members and holding said flag in said upper position whereby when said engagement does not exist said flag will move to said lower position, said means including a magnet magnetically engaging said diaphragm member whereby when said horn is sounded the vibration of the diaphragm occurring in the course of producing said alarm signal causes said magnet to become disengaged allowing said flag to move to said lower position.