I haven't seen one, and I have no experience* with what I'm about to say; this is all based on my reading.
Into the early 20th century, people in snow country would cut ice blocks from the lakes when they froze, then store them in heavily insulated sheds, where, with luck, they'd last into the summer, for use in ice boxes particularly. Looking at it, I wonder if it was used to clamp blocks of ice after they were cut, for hauling on shore to the sled.
*The lakes in Oakland, CA did not freeze in my youth. Still don't.