초록 ▼

A smoke detector is battery operated and may employ an ionization chamber and/or an infrared detector. When the alarm circuit is actuated due to the presence of smoke levels above a predetermined value being sensed by the detector, the alarm is actuated and each of the built in lights is illuminated

A smoke detector is battery operated and may employ an ionization chamber and/or an infrared detector. When the alarm circuit is actuated due to the presence of smoke levels above a predetermined value being sensed by the detector, the alarm is actuated and each of the built in lights is illuminated. An auxilliary light energizeable by said detector is adapted to disengage one of said lights electrically and to be energized at the same time the other of said lights is energized.

대표청구항 ▼

In a smoke detector having a housing consisting of a base and a cover, and having a smoke sensing chamber, means to activate an alarm upon the sensing of a predetermined smoke level by the sensing chamber, and an alarm, all of which are mounted in the base of said housing; said base having at least

In a smoke detector having a housing consisting of a base and a cover, and having a smoke sensing chamber, means to activate an alarm upon the sensing of a predetermined smoke level by the sensing chamber, and an alarm, all of which are mounted in the base of said housing; said base having at least one downwardly side wall, and a bottom wall, the improvement comprising: a pair of lamp sockets, each mounted generally normal to said side wall, and disposed 180°apart from each other on said side wall, each socket having an electric light bulb therein adapted to be lit when said sockets are energized, each of said sockets being electrically connected to; a means to energize said sockets when the alarm sounds and deenergize said sockets when the alarm ceases; whereby a path of egress from the vicinity of said smoke detector is lighted when the detector detects smoke and sounds the alarm.