ice fishing slammers and automatic jigging devices?

[ChrisTheFish]

I'd be careful with using the design, the guy who made them is pretty touchy on other people using the name "slammer." I looked it up a while ago on the internet and I could not find the diagram anywhere, and I'm assuming it is because the idea is patented.

I've been curious myself as to how it works, and would like to try making my own rendition.
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