In the early days, getting electric power to the motor was a problem. Leo Daft came up with a
system of a little cart that would "troll" along behind the car on a double wire, and supply power.
These "Trollers" were not particularly successful because they often fell off, and were eventually
replaced with a long pole that would connect with the overhead wire, but the "Troller" name stuck,
and today we have "Trolleys."