History of Science and Engineering Annotation << Back Mechanics of Wire to 1941. Brief Historical Review V.A. Borisov Historically, approaches to solving two problems on the contact wire with a pulley and chain line. The theoretical development related to other tasks relevant to the historical period under review. Based on the principles of the problem and a number of interpretive system evaluated the dynamics of scientific knowledge. The common characteristics for the two types of problems considered principles for tackling scientific problems. Keywords: filum, polyspast, line in the form of a chain, the science of me-chanics, a belt drive, transmission in the factory, mechanics for builders. E-mail: komilfo_bomond_1@mail.ru. Pp. 2-10