MECHANISM FOR CONTROLLING THE STRIKING FORCE AND THE NON-STRIKING IN A TYPEWRITER.

摘要

a mechanism for controlling the strength and not hit for a machine includes a drive shaft (4) to have at least two parts) (8)(9) corresponding to different attack force, into (13) of the profile of these cams, transmitting the movement has a printing head (1), means (17), travel(18) this into (13) and the means of receipt (20, 40, 41) of impulse control.in order to avoid a significant transfer of energy in the pulse form, the mechanism includes a coiled spring (39) acting on the displacement means (17),(18) in order to cooperate with a device for butee (34 to 38). the device of butee (34 - 38) has participated in several positions by the means of receipt (20, 40, 41).a booster device (59, 61) caused by the motor shaft (4) gives the displacement means (17, 18) in a normal position at each rotation of the shaft (4).