I have a soft spot for proper contraptions. Anything that can be fangled or fashioned, kit or contrivance, whether gimcrack doohickey or skookum thingamajig I feel a certain affection for them.

An automated tin shotgun-clock-scarecrow is something I therefore quite appreciate.

This is the weapon of choice for a Batman villain 'The Timekeeper'.
Former mild mannered watchmaker Tim Keeper shoots things at exactly specific times after a tragic watchmaking accident drove him mad.

To batman and robin: "At the strike of two, I will strike you two down!"

When I lived in rural Oregon next to some wineries, a modern version of this thing went off all the time in the summer. It was to scare the birds away from the grapes.