Patent ID: 6851655

Claim:
A sensor rail device for seat position detection, comprising: (a) an elongated upper rail body to partially and fixedly support a seat thereon; (b) an elongated stationary lower rail body which slidably engages and supports said upper rail body such that said upper rail body can axially slide on said lower rail body; (c) a position sensor device fixedly mounted on said upper rail body; and (d) a contact plate member having a predetermined length, which is secured to said lower rail body at a location to be contacted by said position sensor device as the position sensor device moves along said lower rail body, said position sensor device comprising: (i) a pivotal contact lever device having a magnet member which generates a magnetic field, said contact lever device contacting said contact plate member within a predetermined range along said lower rail body, angularly displacing said magnetic field; and (ii) a stationary magnetic field sensor device which detects angular displacement of said magnetic field, outputting seat positional data to be electronically processed into seat positional signals.