APPARATUS FOR CONTROLLING THE DRIVING ENERGY TRANSMITTED TO THE TYPING MECHANISM OF A TYPING MACHINE AND TYPEWRITERS INCORPORATING SUCH APPARATUS

摘要

A drive system for an electric typewriter has a power roll driven by an electric motor through a drive belt and a pulley rotatably mounted and resiliently connected to the power roll. The driving energy transmitted to the type action of the machine is controlled by energy-absorbing means adjustably connected to the power roll pulley and controlled through appropriate linkage by the machine operator to vary the energy absorbed by the resilient connection between the power roll and the pulley. A self adjusting means is also provided to set the proper tension on the drive belt of the drive system.