Communication system for sielded areas

• US 3,191,122 A
• Filed: 12/01/1961
• Issued: 06/22/1965
• Est. Priority Date: 12/01/1961
• Status: Expired due to Term

• Current Assignee: Clyde V. Hussey
• Original Assignee: Clyde V. Hussey
• Inventors: Hussey, Clyde V.
• Application Number:
  US04/156,351
• Time in Patent Office: 1,299 Days
• US Class Current: 455/7
• CPC Class Codes: H04B 7/00 Radio transmission systems, i.e. using radiation field H04B10/00, H04B15/00 take precedence

Claims

14. A SYSTEM FOR PROVIDING TWO-WAY COMMUNICATION BETWEEN A PLURALITY OF AREAS AT LEAST SOME OF WHICH ARE ELECTRICALLY SHIELDED FROM ONE ANOTHER TO PREVENT THE DIRECT TRANSMISSION AND RECEPTION OF RADIO WAVES THEREBETWEEN;

SAID SYSTEM COMPRISING A FIXED RELAY STATION AT A FIRST OF SAID AREAS;

A PLURALITY OF REMOTE UNITS RESPECTIVELY LOCATED IN OTHER AREAS;

SAID RELAY STATION COMPRISING A TRANSMITTER FOR DEVELOPING A FIRST FREQUENCY SIGNAL, A RECEIVER TUNED TO RECEIVE SIGNALS IN A SECOND FREQUENCY CHANNEL SEPARATED FROM SAID FIRST FREQUENCY, AND A MODULATOR FOR MODULATING THE OUTPUT OF SAID RECEIVER UPON SAID FIRST FREQUENCY SIGNAL;

EACH OF SAID REMOTE UNITS INCLUDING A TRANSMITTER FOR RADIATING A SECOND SIGNAL WITHIN SAID SECOND FREQUENCY CHANNEL, A RECEIVER TUNED TO RECEIVE SAID FIRST FREQUENCY SIGNAL, AND MEANS FOR MODULATING THE SECOND SIGNAL WITH OTHER SIGNALS, WHEREBY TWO-WAY COMMUNICATION MAY BE ATTAINED BETWEEN SAID REMOTE UNITS BY TRANSMISSION OF SIGNALS FROM ONE UNIT TO THE RECEIVER AT THE RELAY STATION WHERE SAID OTHER SIGNALS ARE DETECTED AND MODULATED UPON THE FIRST SIGNAL FOR RECEPTION AT ANOTHER REMOTE UNIT;

MEANS INCLUDING A MANUALLY OPERATED SWITCH AT THE RELAY STATION FOR INTERRUPTING THE MODULATION OF SAID FIRST SIGNAL BY THE OUTPUT OF THE RECEIVER AT THE RELAY STATION AND FOR MODULATING THE FIRST SIGNAL WITH ADDITIONAL SIGNAL TO PERMIT TWO-WAY COMMUNICATION BETWEEN THE RELAY STATION AND EACH REMOTE UNIT;

CONDUCTOR MEANS CONNECTED AT ONE END TO THE RELAY STATION AND EXTENDING AT LEAST PARTIALLY INTO THE ELECTRICALLY SHIELDED AREAS;

AND A PLURALITY OF COMBINED RECEIVING AND EMITTING ANTENNAS ELECTRICALLY CONNECTED TO SAID CONDUCTOR MEANS AND RESPECTIVELY DISPOSED WITHIN SAID ELECTRICALLY SHIELDED AREAS TO THAT EACH ANTENNA PICKS UP THE TRANSMISSION FROM THE REMOTE UNIT OPERATING WITHIN ITS AREA AND ALSO TRANSMITS TO THAT REMOTE UNIT THE SIGNAL DEVELOPED BY THE TRANSMITTER AT THE RELAY STATION.