Transmission system for pulse-codemodulated signals

Claim 1

A TELEPHONIC TRANSMISSION SYSTEM FOR PULSE-CODEMODULATED SIGNALS FOR USE WITH AN AUTOMATIC EXCHANGE, SAID SYSTEM COMPRISING AT LEAST ONE TRANSMITTING STATION, AT LEAST ONE RECEIVING STATION AND TRANSMISSION-LINE MEANS INTERCONNECTING SAID STATIONS, SAID TRANSMITTING STATION COMPRISING FIRST, SECOND AND THIRD INPUTS RESPECTIVELY ENERGIZABLE WITH SIGNALS REPRESENTATIVE OF TRANSMITTABLE SPEECH, TELEPHONE-CIRCUIT-CONTROL DIRECTIONS AND A SUBSCRIBER NUMBER TO BE CONTACTED, SAID SIGNALS BEING APPLIED TO SAID INPUT IN SUBSEQUENT BITS WITH A PREDETERMINED NUMBER OF BITS IN SEQUENCE CONSTITUTING A SIGNAL SLOT, FIRST, SECOND AND THIRD AND-GATING MEANS RESPECTIVELY CONNECTED TO EACH OF SAID INPUTS, SWITCHING MEANS FOR SELECTIVELY ENERGIZING SAID AND-GATING MEANS IN PREDETERMINED SEQUENCE FOR COMMUNICATING THE RESPECTIVE SLOTS OF SIGNALS TO SAID TRANSMISSION-LINE MEANS WHILE ADDING AT LEAST ONE INITIAL BIT TO EACG SLOT IN ACCORDANCE WITH THE AND-GATING MEANS ENERGIZED FOR DIRECTING THE RESPECTIVE SLOT INTO AN APPROPRIATE CHANNEL OF SAID RECEIVING STATION, AND OR-GATING MEANS SUPPLIED WITH THE OUTPUT WITH EACH OF SAID AND-GATING MEANS FOR FEEDING THE RESPECTIVE SIGNAL SLOTS THEREOF IN PREDETERMINED SEQUENCE TO SAID TRANSMISSION-LINE MEANS; SAID RECEIVING STATION BEING PROVIDED WITH A PLURALITY OF LOGIC CIRCUITS CORRESPONDING TO SAID CHANNELS AND EACH BEING ASSOCIATED WITH A RESPECTIVE ONE OF THE SIGNALS REPRESENTATIVE OF TRANSMITTABLE SPEECH, TELEPHONE CIRCUIT CONTROL DIRECTIONS AND A SUBSCRIBER NUMBER TO THE CONTACTED, TIMING MEANS FOR TRANSMITTING TO EACH OF SAID LOGIC CIRCUITS A TIMING PULSE AND OPERABLE IN DEPENDENCE UPON SAID AT LEAST ONE INITIAL BIT IN EACH SIGNAL SLOT FOR ENERGIZING THE RESPECTIVE LOGIC CIRCUIT, AND DELAY MEANS CONNECTED WITH EACH OF SAID LOGIC CIRCUITS AND ENERGIZABLE UPON ENERGIZATION OF A RESPECTIVE LOGIC CIRCUIT FOR PERMITTING THE TRANSMISSION OF THE BITS OF THE RESPECTIVE SIGNAL SLOT SUBSEQUENT OT SAID AT LEAST ONE BIT.