Patent ID: 7940167

Claim:
A battery-powered occupancy/vacancy sensor for control of a lighting load in a room, said sensor comprising: a top plate containing a lens; a bottom plate disposed in a plane parallel to the plane of said top plate, said bottom plate having fastening means for fastening said sensor to a surface of said room; a generally peripheral wall connecting the peripheries of said top plate and said bottom plate and defining a generally flat, shallow disk-shaped volume; a PIR detector circuit housed within the interior of said volume, said PIR detector circuit having a PIR detector aligned with said lens, said PIR detector operable to detect an occupancy or vacancy condition in said room; an RF transmission circuit housed within the interior of said volume and responsive to said PIR detector for transmitting an RF signal to designate the need for a change in the lighting in said room; a first battery housed within the interior of said volume; a second battery housed within the interior of said volume; a battery-removal structure comprising first and second battery supports located at the ends of first and second flexible arms, respectively, for supporting said first and second batteries within the interior of said volume, said battery-removal structure further comprising first and second battery-removal tabs connected to said respective first and second battery supports; wherein when said first battery-removal tab is pulled away from said sensor, said first flexible arm flexes and said first battery support forces said first battery out of the interior of said volume, and when said second tab is pulled away from said sensor, said second flexible arm flexes and said second battery support forces said second battery out of the interior of said volume.