...called it a "come-along"...

The modern "come-along" (as I know it) is a bit of a hybrid. Its action is a built-in dual 'winch' as it has pulley's on both ends that are pulled together just as the barrel is pulled up the ramp, but it has large hooks on both ends which seem to *reflect the function of a single, ratcheted line such as Ron's 'capstan'.

Welcome aboard, dellfarmer!