Patent ID: 7578068

Claim:
A detecting apparatus for detecting whether a dimension of a workpiece matching a specification, the detecting apparatus comprising: a detecting plate having a first face and a second face opposite to the first face, a region having two opposite sides defined on the first face of the detecting plate for supporting the workpiece thereon with one of the sides positioning an edge of the workpiece, a first slot and a second slot defined through the detecting plate outside of the region and adjoining the other one of the sides of the region; a lamp installed on the first face of the detecting plate; a controlling box installed on the second face of the detecting plate, a circuit board with a processor installed in the controlling box, two light sensors installed on the circuit board aligning with the first and second slots of the detecting plate respectively, for detecting whether light emitted by the lamp passes through the first and second slots; and at least one indicator installed on the detecting plate and controlled by the processor which is electrically connected with the light sensors, for showing whether the dimension of the workpiece is eligible, according to detection by the light sensors; wherein each of the first and second slots comprises an edge away from the other one of the sides of the region, a vertical distance between the edges of the first and second slots is equal to a tolerance of the dimension of the workpiece.