Annunciator for use with electronic digital clock

An annunciator system comprising:

• a source of data signals, a subset of said data signals at any particular instant being in a high state, the remaining subset of said data signals being in a low state;
• initiator means adapted for delivering an initiation signal when an announcement is to be made;
• a time slot generator for generating a sequence of time slots and adapted for receiving said initiation signal and in response thereto adapted for generating a sequence of sets of time slot signals, each of said sets identifying a respective time slot in said sequence of time slots;
• an audio frequency signal generator means adapted for generating a low frequency signal and for generating a high frequency signal;
• audio output means adapted for receiving an input signal and adapted for delivering in response thereto an audio tone of like frequency;
• and
• selector means adapted for receiving as selector input said sets of time slot signals, said selector means adapted for receiving as data input said data signals, said selector means being adapted for associating each of said data signals with a respective time slot, said selector means adapted for selecting and causing to be delivered to said audio output means a particular one of said audio signals during those of said time slots for which said respective data signals are high and for selecting and causing to be delivered to said audio output means the other of said audio signals during those of said time slots for which said respective data signals are low.