Simulator for railroad hot wheel detector

An apparatus for simulating a hot wheel on railroad rolling stock to verify the operation of a hot wheel detector, comprising:

• a movable carriage having at least two axles, the axles being generally parallel to each other and each axle having corresponding left and right ends;
• a wheel at each end of each axle, the left wheels each having inner and outer faces such that the respective faces of the left wheels are substantially coplanar, the inner and outer planes of the faces being parallel and defining a space therebetween;
• and
• at least one heater disposed substantially between the planes of the inner and outer faces of the left wheels to simulate a hot wheel.

An apparatus for simulating a hot wheel on railroad rolling stock to verify the operation of a hot wheel detector, comprising:

• a movable carriage having at least four horizontal axles (A, B, C and D), the axles being generally parallel to each other and each axle having corresponding left and right ends, the carriage including a car riding on first and second trucks, the first truck having axles A and B and the second truck having axles C and D;
• a wheel at each end of each axle, the wheels each having inner and outer faces such that the respective faces of the wheels on the left end of the axles are substantially coplanar, the inner and outer planes of the faces being parallel and defining a space therebetween;
• a left, high temperature heater disposed between the wheels at the left end of the axles of the first truck, substantially between the planes of the faces of the wheels on the left end of the axles for directing heat generally horizontally outwardly from the carriage at a substantially constant temperature above ambient to simulate a hot wheel on the left side of the carriage, the heater being mounted at a distance from the wheels in the order of a wheel radius so as to prevent heat from the wheels from interfering with verification of detector operation;
• and
• a left, low temperature heater having a temperature lower than the left, high temperature heater and being disposed between the wheels at the left end of the axles of the second truck, substantially between the planes of the faces of the wheels on the left end of the axles to simulate a wheel below the temperature of a hot wheel below the temperature of a hot wheel on the left side of the carriage, the heater being mounted at a distance from the wheels in the order of a wheel radius so as to prevent heat from the wheels from interfering with verification of detector operation.