1
Bernard E Callahan, George A Carlson, Richard N Daniels, Richard H Noens, Richard A Stumpf, Richard H Kruse: Vehicular data handling and control system. Vapor Corporation, Francis J Lidd, November 25, 1980: US04236215 (36 worldwide citation)

An onboard unit consisting of a tape recorder, and associated data handling components utilized to provide records of vehicular operating information including speed, distance, power level, braking level, traction motor current and other control events. Each quantity is associated with an incrementa ...


2
Philip M Higgins, William B MacKenna, Lawrence G Sickels, Richard A Stumpf: Door control systems. Vapor Corporation, Francis J Lidd, January 1, 1985: US04491917 (11 worldwide citation)

A door control system, particularly suited for multiple door rapid transit vehicles wherein car operating parameters including car speed sensing (5), traction propulsion sensing (7), and other indications of internal circuitry establish and continuously test for predetermined conditions under which ...