Patent ID: 6160370
Filing Date: 2000-12-12
Classification: E05F,E05Y,G05B,G08B,H03K

Abstract:
A safety device for automobile power window system comprising;a window motor;a first capacitor being provided at a window sash;a second capacitor being provided at a window sash;a pulse generator;a first variable phase delay generator which delays phase of the signal pulse received from the pulse generator depending on capacity of the first capacitor;a second variable phase delay generator which delays phase of the signal pulse received from the pulse generator depending on capacity of the first capacitor;a phase comparator which compares phases of the signals each provided by the first and second variable phase delay generators; anda motor controller which stops window motor when one of said phase comparator detects the phase delay are relatively reversed between the first variable phase delay generators or the second variable phase delay generators.