In 1760 Robert Kay invented the drop box, by which different shuttles carrying different colors of thread were employed. Edward W. Byrn.十九世纪发明进展.
Spindles, shuttles, wheels, and contrivances, plying ideally within the same; rather hopeless-looking, which, however, he did at last bring to bear. 鲁伯特·萨金特·荷兰.历史性发明.