In 1925, Rue R. Elston, the founder of the Elston Company, and his wife, Clara, and son, Wendell, moved to Sioux Falls, SD from Spencer, Iowa. Rue found employment with the Manchester Biscuit Company. The next year his son Jack was born. In 1927 Rue, wife Clara, and two sons, Wendell and Jack moved to Minneapolis, MN where Rue found work as a bus driver for Twin City Motor Bus.
One snowy night, Rue saw a young man get hit by a car while spreading sand with a shovel at a bus stop. The man lost his leg in the accident. After seeing this accident, Rue thought a unit could be manufactured to mount in front of the drive wheels of a bus and be electrically controlled by the driver. Such a unit could help eliminate this type of accident by spreading sand in front of the drive wheels of the bus. After extensive testing and engineering, the first units were installed on Greyhound buses.