Composition keyboard, Lanston Monotype Corporation Ltd, Washington DC, USA, 1897; no serial number. A mechanism for perforating a paper ribbon which is used for controlling a composition caster. The keyboard has one bank of key buttons. Other features include a mechanical accumulator made up of a line-length rack, unit wheel, swinging arm and key-operated stops. The widths of characters were added up as they were keyboarded. There is a paper dial on the front of the machine.