Abstract: The present disclosure relates to notification devices. The teachings thereof may be embodied in methods and devices for providing an alarm signal, e.g., a notification device having multiple different alarm strengths comprising: a housing with a viewing opening; an alarm component which emits an alarm signal; a drive circuit comprising a drive end and a setting end, the drive end connected to the alarm component; and a replaceable jump wire assembly comprising a mark and a conductive element with a one-to-one correspondence between the mark and an electrical characteristic of the conductive element. The drive circuit may determine an alarm signal strength in response to an input of the setting end. Each replaceable jump wire assembly may be connected to the setting end of the drive circuit and, when connected, display the mark for viewing through the viewing opening.

Abstract: The present disclosure relates to notification devices. The teachings thereof may be embodied in methods and devices for providing an alarm signal, e.g., a notification device having multiple different alarm strengths comprising: a housing with a viewing opening; an alarm component which emits an alarm signal; a drive circuit comprising a drive end and a setting end, the drive end connected to the alarm component; and a replaceable jump wire assembly comprising a mark and a conductive element with a one-to-one correspondence between the mark and an electrical characteristic of the conductive element. The drive circuit may determine an alarm signal strength in response to an input of the setting end. Each replaceable jump wire assembly may be connected to the setting end of the drive circuit and, when connected, display the mark for viewing through the viewing opening.

Abstract: A lens, a light-emitting device having a lens, and a visual notification appliance are disclosed. The lens may be substantially in the shape of a cap, and may include a substantially flat bottom surface, and a substantially cross-shaped recess sunken into the bottom surface, the recess providing orthogonal cross-arms, the optical source being adapted to be disposed in a cavity formed by the recess and capable of aligning with a crossing center of the cross-arms, and the recess being arranged so that more light incident upon an internal surface of the recess is refracted to the directions of the cross-arms than to the directions between the cross-arms.

Abstract: A lens, a light-emitting device having a lens, and a visual notification appliance are disclosed. The lens may be substantially in the shape of a cap, and may include a substantially flat bottom surface, and a substantially cross-shaped recess sunken into the bottom surface, the recess providing orthogonal cross-arms, the optical source being adapted to be disposed in a cavity formed by the recess and capable of aligning with a crossing center of the cross-arms, and the recess being arranged so that more light incident upon an internal surface of the recess is refracted to the directions of the cross-arms than to the directions between the cross-arms.