Cushman, Darby & Cushman
Brake lining wear warning system
 A brake lining wear warning system comprising a probe which becomes nonconductive when the wear of a brake lining reaches a critical value, a holding circuit adapted to be placed in a set condition in response to the nonconduction of the probe and remain in the set condition even after the termination of the nonconduction of the probe, and a warning device for giving a warning when the holding circuit is in the set condition. 
Toyota Jidosha Kogyo Kabushiki Kaisha Nippondenso Co., Ltd.
F
F16D
inventional
Koichi Hiroshi
Taniguchi Arai