I somehow stumbled onto this old tin lithographed toy Coal Loader made by Wyandotte (perhaps in the 1940’s - 1960’s timeframe). Although it doesn’t seem to have been marketed as a toy train accessory, it works perfectly with my Marx and Hafner windup and electric trains. It is a very clever mechanism that automatically loads marbles into trucks or freight gondolas.
Here is a video of all the loading action.
