1979-08-27
1981-11-24
Shay, F. Barry
A63H 1910
Patent
active
043016170
ABSTRACT:
In a model of a steam locomotive which is driven by an electric motor and includes a model reproduction of the valve gear regulating the steam control valves of the steam cylinders, the electric motor is coupled to the axle of a set of driving wheels of the model via a drive shaft, which is permitted a limited amount of axial float and is coupled to the axle by a gearbox. Axial movement of the drive shaft is produced by interaction between the gears of the gearbox and is controlled by coil springs disposed on the shaft at opposite ends of the gearbox. These axial movements result from changes in the amount and direction of the torque applied to the gearbox by the electric motor and are transmitted to the model valve gear by an axially movable rod. Hence the configuration of the model valve gear is continuously changeable in accordance with the required pulling power and direction of movement of the model locomotive so that the position of the model valve gear substantially corresponds to that of the real locomotive when operating under similar conditions, thereby providing for more realistic operation of the model.
REFERENCES:
patent: 2030201 (1936-02-01), Gilbert
patent: 2595936 (1952-05-01), Goode
patent: 2814257 (1957-11-01), Joyce
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