US Patent 1,782,945, granted 25 November 1930 to Edwin W. Stone and Eugene Martin, assignors to Bigelow-Sanford Carpet Co. It describes an electric drive for wide carpet and rug looms. A pair of motors at opposite sides of the loom is positively geared to the crank shaft, replacing the mechanical clutch, and each motor has an electrically released brake. The text covers the control circuits (start and stop switches on a shipper rod, a master switch for releasing the brakes alone so the loom can be turned by hand, shuttle-boxing limit switches, and thermal overload relays), followed by 14 claims. Two sheets of drawings show the loom and the wiring diagram.