 In 1673, while working with Christiaan Huygens and Gottfried Leibniz in Paris, he became interested in using a vacuum to generate motive power.Papin first visited London in 1675, and worked with Robert Boyle from 1676 to 1679, publishing an account of his work in "Continuation of New Experiments" (1680).During this period, Papin invented the "steam digester," a type of pressure cooker with a safety valve.