Abstract: An automatic telephone dialing apparatus wherein a plurality of telephone numbers are stored in a storage medium for rapid retrieval thereof upon the actuation of a single button to produce a complete dialing signal for a telephone system. The apparatus is designed so that information identifying successive numeral digits of each telephone number is stored in accordance with various alternative schemes such that numeral digits in corresponding digit positions of each telephone number form at least one of a plurality of separate groups each group being stored at a different region of the storage medium.

Abstract: A rotary dial device for a telephone set, in which an additional function of preventing a toll dialling is provided. In accordance with this invention, a contact is further attached to an usual dial to classify dial impulses so that when a number "1," one of numbers "2" to "9," and a number "0" are dialled, one, two and three pulses are produced respectively. The dialling function subsequent to the first dialling number "0" and the first and second dialling numbers "10" is effectively stopped by counting the classified pulses.