Optional alarm and battery backup system for a talking timepiece

A talking timepiece including a keyboard having a voice/tone switch, a speech processor, and a tone alarm generator, said timepiece having at least two modes of operation including a first mode in which said voice/tone switch is provided for selective manual switching between said speech processor adapted to provide for audible speech sounds in the form of voice messages for announcing time and said tone alarm generator adapted to provide for tone sounds for announcing time and including a power supply failure mode in which said voice/tone switch is bypassed, said speech processor is disabled and tone sounds are automatically produced by said tone alarm generator for announcing time, said timepiece comprising:

• a. a computer electrically coupled to said keyboard, to said tone alarm generator and to said speech processor and responsive to said selective manual switching of said voice/tone switch for controlling both said speech processor to produce said voice messages at selected times and said tone alarm generator to produce said tone alarm sounds at selected times during said first mode of timepiece operation;
• and, said computer adapted for automatically controlling said tone alarm generator to produce said tone sounds, independent of said selective manual switching of said voice/tone switch, at predetermined times during said power supply failure mode of timepiece operation,
• b. a power supply for providing power to said computer and said speech processor during said first mode of timepiece operation,
• c. a battery backup electrically coupled to said power supply for providing power to substantially only said computer during said power supply failure mode of timepiece operation when said power supply fails, and
• d. circuit switching means electrically coupled to said power supply and battery and to said computer and responsive to a failure of said power supply for bypassing said voice/tone switch to provide for said computer to automatically control said tone alarm generator independent of said voice/tone switch to produce said tone alarm sounds at predetermined times during said power supply failure mode of timepiece operation.