RECEIVING DEVICE FOR CONTROL INFORMATION

• US 3,628,153 A
• Filed: 12/16/1969
• Issued: 12/14/1971
• Est. Priority Date: 12/19/1968
• Status: Expired due to Term

• Current Assignee: Bastian Advanced Systems Incorporated
• Original Assignee: Fukata Masayuki
• Inventors: FUKATA MASAYUKI
• Application Number:
  US04/885,401
• Time in Patent Office: 728 Days
• US Class Current: 455/231
• CPC Class Codes: H03G 3/005 Control by a pilot signal H03G3/001 takes precedence
• CPC Class Codes: H04H 20/59 for emergency or urgency
• CPC Class Codes: H04H 20/89 using three or more audio channels, e.g. triphonic or quadraphonic
• CPC Class Codes: Y10S 358/908 Pause control, i.e. "commercial killers"

Abstract

A receiving device for control information formed by a first control signal and a second control signal transmitted after the first signal and having a duration less than the duration of the first signal, where the durations of received signals having the same frequency as the control signals are measured to generate a first output when the duration exceeds a predetermined time Ts and to generate a second output when the duration exceeds predetermined time Tc less than the time Ts. The duration of the first control signal is longer than the time Ts, and the duration of the second control signal is less than the time Ts and more than the time Tc. A controlled circuit is triggered to and selfheld in the switching-in state in response to the first output and restored in response to the second output.

Claims

1. A receiving device for control information formed by a first signal and a second signal transmitted after the first signal and having a duration less than the duration of the first signal, comprising:

selection means for selecting the control information from a transmitted signal to convert it to at least one DC signal;

time-measuring means coupled to the output of the selection means for generating a first output when the duration of the DC signal exceeds a predetermined time Ts and for generatiNg a second output when the duration of the DC signal exceeds a predetermined time Tc less than the time Ts, the duration of said first signal being longer than the time Ts, the duration of said second signal being longer than the time Tc and less than the time Ts;

first control means coupled to the output of the time-measuring means for triggering a control circuit to the switching-in state thereof in response to the first output and for holding the switching-in state of the control circuit;

second control means coupled to the time-measuring means for releasing the hold state of the first control means in response to the second output; and

third control means coupled to the first and second control means for checking the application to the first control means of the second output until completion of said hold state of the first control means.

2. A receiving device for control information according to claim 1, in which the time-measuring means comprises two capacitors respectively having a charging time constant corresponding to the time Ts and a charging time constant corresponding to the time Tc.

3. A receiving device for control information according to claim 1, in which the time-measuring means comprises a capacitor, first detecting means for generating the first output when the charged voltage of the capacitor reaches a predetermined first voltage after the time Ts starting from the start of the first control signal, and second detecting means for generating the second output when the charged voltage of the capacitor reaches a predetermined second voltage less than the first voltage after the time Tc starting from the start of each of the first and second control signals.