Remote control device using telephone circuit of electric apparatus

An electric apparatus, connected to a telephone circuit and incorporating means for operation of the electric apparatus in response to reception of a code over the telephone line consisting of "dialed" or "push button-entered" numbers, said means comprising:

• loop means for automatically engaging a telephone set with the telephone circuit by detecting a ringing signal from the telephone set;
• an electric apparatus having a plurality of operation modes to be selected;
• a tone decoder for converting a remote control signal transmitted through the telephone circuit to a code after a loop is formed by said loop means;
• key code preset means;
• comparator means for comparing a key code preset by said key code preset means and the key code supplied by the remote control signal and converted by said tone decoder;
• means for disengaging the loop engaged by said loop means in accordance with a noncoincidence signal from said comparator means;
• selecting means for selecting a desired operation mode of said electric apparatus in accordance with an output from said tone decoder;
• operation time interval preset means for presetting an operation time interval of said electric apparatus in accordance with the output from said tone decoder;
• a counter for setting an output for selecting the operation mode and/or the operation time interval of said electric apparatus from said tone decoder;
• pulse generating means for generating pulses the number of which corresponds to a count set in said counter;
• and audible signal oscillating means for transmitting an audible signal onto the telephone circuit in response to an output from said pulse generating means.