I was thinking more about the tens and twenties
Life in a factory was nasty, brutish, and short in those days, and often took limbs.
At least, that's when the labour movement started to really get going up here, which resulted over the course of the following three decades in the environment that your dad was working in. If he'd been trying to get benefits etc back then, chances were good that he'd be beaten into stupidity for his troubles.