Patent ID: 7782191

Claim:
A portable alarm apparatus for warning a person, the portable alarm apparatus comprising: a manually portable base unit; an integrated circuit assembly; a constant power supply supported by the base unit, the constant power supply including an external power supply having an interface connectible to a power source external of the base unit, the constant power supply including an onboard power supply independent of the external power supply, and a detection circuit supported by the base unit, the detection circuit being connected to the constant power supply, the detection circuit being operable to detect a monitored condition; and an alarm circuit supported by the base unit, the alarm circuit being connected to the constant power supply, the alarm circuit being operable in response to detection of the monitored condition by the detection circuit to produce an alarm signal for warning at least one person; the integrated circuit assembly including a portion of at least one of: the detection circuit, the alarm circuit, and the constant power supply, the integrated circuit assembly including multiple layers, the layers including: an outer fire retardant layer adjacent to a light emitting layer, a solar cell layer adjacent to the light emitting layer, a battery cell layer adjacent to the solar cell layer, and an inner integrated circuit layer adjacent to the battery cell layer.