US Patent 2,552,942, granted 15 May 1951 to Olivier H. M. J. Dalle of Ecully, France, assignor to Societe des Mecaniques Verdol, Lyon. It describes a machine for punching pattern cards or paper bands for Verdol-type Jacquard looms. An operator follows the design on a board with a pointer and eight finger keys, and electromagnets and hooks control the feeler needles of a punching device. The machine can also duplicate existing cards. The patent has five sheets of drawings, a specification describing the mechanism and its operation, and seven claims.