Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to JP5316875ApriorityCriticalpatent/JPS51129106A/ja
Publication of JPS51129106ApublicationCriticalpatent/JPS51129106A/ja
Publication of JPS547643B2publicationCriticalpatent/JPS547643B2/ja
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
H04M1/315—Clutches; Spring assemblies; Speed regulators, e.g. centrifugal brakes