sentences:  The company attracted a number of talented immigrant machinists and designers to its ranks, including O.F.Mossberg and Andrew Fyrberg, who would go on to invent the company's top-latching strap mechanism and the "Hammer-the-Hammer" transfer bar safety system used on the company's popular line of top-break safety revolvers.Iver Johnson died of tuberculosis in 1895, and his sons took over the business.