Singer consolidated enough patents in the field to enable him to engage in mass production, and by 1860 his company was the largest manufacturer of sewing machines in the world. In 1885 Singer produced its first "vibrating shuttle" sewing machine, an improvement over contemporary transverse shuttle designs (see bobbin drivers). The Singer company began to market its machines internationally in 1855 and won first prize at the Paris world's fair that year. The company demonstrated the first workable electric sewing machine at the Philadelphia electric exhibition in 1889 and began mass-producing domestic electric machines in 1910. Singer was also a marketing innovator, and a pioneer in promoting the use of installment payment plans.