Specialized Apparatus for Testing Subway Cars

Methods of making tests of a varied nature on subway cars are described and details of pieces of apparatus are given. Instrumentation for recording braking tests is discussed and followed by discussion of rapid distance recording. A novel form of speedometer is detailed and its special drive mechanism is described. A brief comment on accelerometers is followed by opinions on the criteria for desirable current-voltage recorders. The need for time synchronization of paper charts and a method of providing every recorder simultaneously with an accurate comrnon time scale trace is described. Conmments on common temperature measurements and a description of a little known method of high temperature recording follow. A simple duty cycle meter and a device for detecting partial breaks in cables are discussed, followed by a synopsis of a few other devices used in Toronto.