The Zamboni machine has become one of many people's favorite parts of Ice Hockey. Technically this device is called an ice resurfacer, but everyone just calls it a "Zamboni" after the inventer.
Frank Zamboni invented the machine over the period from 1942 to 1949 to help with the time-consuming task of resurfacing his ice rink.
I'm curious what came before this. The wikipedia page mentions ice being manually scraped and watered before, but also stresses how time-consuming this was. Presumably he could afford this as a business owner, but it was still enough of a hardship to motivate the hard work to develop the machine.
If it was really that bad, did a lot of people just not bother? Did hockey games not resurface at halftime (or ever?) If so, how was it typically done? Was there an earlier period where nobody bothered, but just let skaters deal with the ruts? I'd imagine a lot of skating was done on frozen lakes that would have been remote from unfrozen supplies of water.