Mobile radio paging system wherein the receivers are all made operative for a brief interval following a transmitted tone burst

• US 3,387,212 A
• Filed: 06/09/1964
• Issued: 06/04/1968
• Est. Priority Date: 06/09/1964
• Status: Expired due to Term

• Current Assignee: Barry M. Kaufman
• Original Assignee: Barry M. Kaufman
• Inventors: Kaufman, Barry M.
• Application Number:
  US04/373,667
• Time in Patent Office: 1,456 Days
• US Class Current: 455/18
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Claims

17. A SYSTEM FOR PAGING A CERTAIN STATION IN A RADIO COMMUNICATIONS SYSTEM THROUGH A REPEATER, SAID SYSTEM COMPRISING, A CALLING STATION, AUDIO TONE GENERATOR MEANS IN SAID CALLING STATION, RADIO TRANSMISSION MEANS IN SAID CALLING STATION TO TRANSMIT SAID TONE AND OTHER COMMUNICATIONS, SAID CALLING STATION TRANSMITTING A PAGE TONE PULSE TO ACTUATE RECEIVER SPEAKERS AND TRANSMITTING A COMMUNICATE TONE PULSE AT THE INITIATION OF EACH COMMUNICATION, SAID PAGE TONE PULSE BEING OF GREATER DURATION THAN SAID COMMUNICATE TONE PULSE, A REPEATER STATION REMOTE FROM SAID CALLING STATION, ACTIVATION MEANS IN SAID REPEATER STATION TO CAUSE SAID REPEATER STATION TO RE-TRANSMIT SIGNALS ONLY WHEN SAID SIGNALS ARE PRECEDED BY A TONE PULSE, TONE INHIBITOR MEANS IN SAID REPEATER STATION TO PREVENT SAID REPEATER STATION FROM REPEATING AND RETRANSMITTING FOR A FIXED TIMING DURATION AT THE COMMENCEMENT OF EACH RETRANSMISSION, SAID FIXED TIMING DURATION BEING GREATER THAN THE DURATION OF SAID COMMUNICATE TONE PULSE AND LESS THAN THE DURATION OF SAID PAGE TONE PULSE, TO PREVENT RETRANSMISSION OF SAID COMMUNICATE TONE PULSES AND PERMIT RETRANSMISSION OF A PORTION OF SAID PAGE TONE PULSES SUFFICIENT TO ACTIVATE RECEIVER SPEAKERS.

23. A SYSTEM FOR PAGING A CERTAIN STATION IN A RADIO COMMUNICATIONS SYSTEM COMPRISING, TONE GENERATOR MEANS TO PRODUCE AN AUDIBLE TONE, A MANUAL PAGING SWITCH TO ACTUATE SAID TONE PULSE MEANS TO PRODUCE A TONE PULSE, RADIO TRANSMISSION MEANS TO TRANSMIT SAID TONE PULSE AND OTHER COMMUNICATIONS, RADIO RECEIVER MEANS, SPEAKER MEANS RECEIVING THE AUDIO OUTPUT OF SAID RADIO RECEIVER MEANS, SAID SPEAKER MEANS BEING NORMALLY IN A SILENT STATE, AND SPEAKER ACTIVATION MEANS RECEIVING THE AUDIO OUTPUT OF SAID RADIO RECEIVER MEANS TO ACTIVATE SAID SPEAKER MEANS FOR A TIMING INTERVAL OF A GIVEN DURATION UPON RECEPTION OF SAID TONE PULSE, AND A TIMING CIRCUIT ACTIVATED BY RECEPTION OF SAID TONE PULSE TO OPERATE THROUGH SAID SPEAKER ACTIVATION MEANS TO MAINTAIN SAID SPEAKER MEANS OPERATIVE DURING SAID TIMING INTERVAL.