Quoted from jrpinball:I don't know where this expression came from. Much more like an ice skate than a snowshoe!
I first saw that term used in the Williams 1966 Parts catalog as the description for that type of unit. Instead of contact points on "fingers", note the shape of the spring-loaded, moveable contact face. It resembles a snow shoe of that era.
I did not see a Gottlieb part catalog until 1977 when I picked one up at the main Empire Distributing location (120 S. Sangamon in Chicago).