Patent ID: 9087441
Filing Date: 2015-07-21
Classification: G08B

Abstract:
1. A notification appliance circuit (NAC) comprising: a plurality of notification devices, each device including a strobe circuit and an energy storage device for supplying electrical energy to the strobe circuit to generate light flashes, the electrical storage device having a capacity to store enough electrical energy for repeated generation of light flashes over a time period without fully discharging; circuit wiring connected to the notification devices to provide electrical power to the notification devices; a power conditioning circuit connected to the circuit wiring for providing charging current to the energy storage device; and a controller for providing control signals to the power conditioning circuit to control the charging current provided to the energy storage device; wherein the controller provides control signals to cause the power conditioning circuit to fully charge the energy storage device when the NAC is in a supervisory state; wherein the controller provides control signals to cause the power conditioning circuit to recharge the energy storage device when the NAC is in an active state and the energy storage device has been partially discharged; wherein the controller provides control signals to the strobe circuit to reduce intensity of the light flashes during a period when the energy storage device is being recharged when the NAC is in the active state.