Abstract: A notification appliance (10) includes a lighting element (30) and strobe drive electronics (18) mounted on a single printed circuit board (14). A lens (20) is mounted to the printed circuit board (14) over the lighting element (30). The lens (20) includes a cavity (35) disposed over the lighting element (30). The lens (20) is shaped to focus light from the lighting element (30) into a far-field lighting pattern (40) including a visible first arc (42) that subtends approximately a 90° angle in a first plane, a visible second arc (44) that subtends approximately a 180° angle in a second plane, and two visible spots (46), each spot (46) on an opposite side of the first arc (42) from the other. A lens (20) for a notification appliance (10) is also disclosed.

Abstract: A method of operating a sound generation mechanism includes determining a temperature of the sound generation mechanism, identifying a resonant frequency of the sound generation mechanism associated with the determined temperature, and communicating an excitation frequency to the sound generation mechanism. The excitation frequency is selected in response to the resonant frequency associated with the determined temperature. The sound generation mechanism is operated to produce one or more sounds.

Abstract: A notification appliance (10) includes a lighting element (30) and strobe drive electronics (18) mounted on a single printed circuit board (14). A lens (20) is mounted to the printed circuit board (14) over the lighting element (30). The lens (20) includes a cavity (35) disposed over the lighting element (30). The lens (20) is shaped to focus light from the lighting element (30) into a far-field lighting pattern (40) including a visible first arc (42) that subtends approximately a 90° angle in a first plane, a visible second arc (44) that subtends approximately a 180° angle in a second plane, and two visible spots (46), each spot (46) on an opposite side of the first arc (42) from the other. A lens (20) for a notification appliance (10) is also disclosed.

Abstract: A notification appliance is disclosed and includes a sound engine that generates sound according to an acoustic pattern and the power control that regulates input voltage to the sound engine that is matched to the acoustic pattern. A method of powering a sounder is also disclosed and includes providing a constant input current and regulating an input voltage to a phase of a sound engine corresponding with an acoustic signal generated by a sound engine.

Abstract: A light pattern generating device is provided and includes light sources arrayed at ninety degree intervals from each other and lenses arrayed in respective positional association with the light sources such that, when the light sources are activated, the light sources and the lenses generate at least a UL 1971 compliant light pattern.

Abstract: A power supply for a synchronized appliance is disclosed and includes a first energy store having a first energy storage capacity, a processor powered by energy from the first energy store, and a second energy store having a second energy storage capacity greater than the first energy storage capacity. The processor initiates charging of the second energy store after a delay beginning at a time of receipt of a charge of predefined level from the first energy store.

Abstract: A notification appliance is disclosed that includes a light engine for generating light flashes at a predetermined interval, an energy store for supplying energy to the light engine to generate the light flashes at the predetermined intervals and a charge controller for charging the energy store to a full charge level required to generate the light flashes. The charge controller controlling an input current to charge the energy store to reach the full charge level at the predetermined interval.

Abstract: A notification appliance circuit includes at least one notification appliance. The at least one notification appliance includes a charge controller including a single stage current controller, the charge controller being configured to output a charge current, an energy store configured to receive the charge current, and provide a discharge current, and a notification component configured to receive the discharge current and emit a notification.

Abstract: A method of operating a sound generation mechanism includes determining a temperature of the sound generation mechanism, identifying a resonant frequency of the sound generation mechanism associated with the determined temperature, and communicating an excitation frequency to the sound generation mechanism. The excitation frequency is selected in response to the resonant frequency associated with the determined temperature. The sound generation mechanism is operated to produce one or more sounds.

Abstract: A light pattern generating device is provided and includes light sources arrayed at ninety degree intervals from each other and lenses arrayed in respective positional association with the light sources such that, when the light sources are activated, the light sources and the lenses generate at least a UL 1971 compliant light pattern.

Abstract: A notification appliance circuit includes at least one notification appliance. The at least one notification appliance includes a charge controller including a single stage current controller, the charge controller being configured to output a charge current, an energy store configured to receive the charge current, and provide a discharge current, and a notification component configured to receive the discharge current and emit a notification.