Patent ID: 7319402

Claim:
A combined doorbell and smoke detection device for alerting a homeowner when a guest has arrived and further when a dangerous level of smoke is present within a building structure, said combined doorbell and smoke detection device comprising: a housing having a plurality of linear and monolithically formed sides, one of said sides including a plurality of openings formed adjacent to top corners of said housing, said one side being directly engaged against a support surface wherein a plurality of fasteners are passed through said openings and into said support surface such that said housing is statically maintained at an elevated position during operating conditions; a door bell chime nested within said housing; a first control unit nested within said housing and being electrically coupled directly to said door bell chime; a carbon monoxide smoke detector nested within said housing and disposed adjacent to said door bell chime; an ionization smoke detector nested within said housing and seated adjacent to said carbon monoxide smoke detector; a second control unit electrically coupled to said carbon monoxide and ionization smoke detectors respectively such that each of said carbon monoxide and ionization smoke detectors are independently and simultaneously operable with each other and said door bell chime respectively, said second control unit generating and transmitting an output signal to said carbon monoxide and ionization smoke detectors based upon a predetermined user input signal; a power interrupt diverting switch disposed within said housing and electrically mated to an external power supply source; an internal power supply source nested within said housing and directly coupled to said power interrupt diverting switch; and a transformer electrically and directly coupled to said power interrupt diverting switch as well as said first and second control units for selectively converting a first voltage level received from the external power supply source to a second voltage level transmitted to said first and second control units respectively; wherein said power interrupt diverting switch channels power from said internal power supply source to said first and second control units when the external power supply source is inactive.