H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/30—Devices which can set up and transmit only one digit at a time
H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
F16D41/00—Freewheels or freewheel clutches
F16D41/12—Freewheels or freewheel clutches with hinged pawl co-operating with teeth, cogs, or the like
Embrayage a friction a dispositif de rattrapage d'usure equipe de moyens permettant sa mise a zero et outil adapte a la mise a zero dudit dispositif