Patent ID: 6651385
Filing Date: 2003-11-25
Classification: E05F,E05Y,H03K

Abstract:
A non-contact sensor system that controls movement of a door moving in a closing direction the sensor system comprising:(a) a transmitter extending a first predetermined distance beyond a leading edge of the door at a first door side for transmitting a signal toward a second door side, said transmitter being attached to the door by a first moveable member, said first moveable member being pivotally attached to the leading edge of the door and capable of engaging a surface when the door closes and moving between a first extended position and a first retracted position relative to the leading edge of the door; and (b) a receiver extending a second predetermined distance beyond the leading edge of the door at the second door side in relative alignment with the transmitter for detecting the signal and for generating an output signal when the transmitter signal is blocked, said receiver being attached to the door by a second moveable member, said second moveable member being pivotally attached to the leading edge of the door and capable of engaging the surface when the door closes and moving between a second extended position and a second retracted position relative to the leading edge of the door, the output signal being suppressed when the second moveable member is in the second retracted position, wherein said first and second members each pivot toward said first and second retracted positions, respectively, in an area substantially between planes defined by front and back surfaces of the door as the door closes until the first and second moveable members reach the first and second retracted positions, respectively, so as to be parallel and adjacent to the leading edge of the door and each of said first and second members pivot toward the first and second extended positions, respectively, as the door opens.