Artist Tricia Keightley (b. 1968) is an inventor of machines that don’t work—at least not in the traditional sense. She calls her paintings “mechanical abstractions,” each one uniquely assembled from her rich vocabulary of rivets, cords, and counterweights with such precision that they appear computer generated. In truth, Keightley improvises each painting widget by widget, eventually creating an object that looks familiar, but couldn’t possibly exist or function off of the canvas. Her work prompts your imagination, and makes you wonder at the structures that both hold our world together and hold it back.