Improvements in appliances to establish telephone communication without marking the number in the disc. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in apparatus for establishing telephone communication without dialing the number of the disc, characterized by the fact that said device consists of a cylinder that carries its undulated surface, in which the elevations formed by each two depressions, make the effect of stops or stop lines. (Machine-translation by Google Translate, not legally binding)