Digital monitoring system

• US 3,293,605 A
• Filed: 01/20/1966
• Issued: 12/20/1966
• Est. Priority Date: 01/20/1966
• Status: Expired due to Term

• Current Assignee: Laurence Moore
• Original Assignee: Laurence Moore
• Inventors: Moore, Laurence
• Application Number:
  US04/532,491
• Time in Patent Office: 334 Days
• US Class Current: 340/870.09
• CPC Class Codes: G08B 25/00 Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems

Claims

1. AN ENCODING STATION FOR PROVIDING A PULSE TRAIN HAVING SEQUENTIALLY AND CYCLICALLY ENCODED THEREON A PLURALITY OF CONDITION RESPONSIVE FUNCTIONS EACH OF WHICH HAS A FIRST AND A SECOND CONDITION, AND EACH OF WHICH IS ASSOCIATED WITH A DIFFERENT PERIOD WITHIN ONE CYCLE OF SAID PULSE TRAIN, SAID ENCODING STATION COMPRISING:

A SOURCE OF PERIODIC PULSES FOR PROVIDING A TIMING CYCLE CONSISTING OF ONE FUNCTION PULSE ASSOCIATED WITH EACH FUNCTION;

MODULATION MEANS RESPONSIVE TO SAID PERIODIC PULSES AND THE CONDITION OF SAID FUNCTIONS AND OPERATIVE TO SEQUENTIALLY MODULATE EACH OF SAID FUNCTION PULSES IN ACCORDANCE WITH THE CONDITION OF THE ASSOCIATED FUNCTION AND TO PROVIDE A CYCLE SIGNAL AFTER COMPLETING A SEQUENCE OF MODULATION;

MEANS RESPONSIVE TO SAID CYCLE SIGNAL AND OPERATIVE TO DISABLE SAID SOURCE OF PERIODIC PULSES FOR A FIRST TIME INTERVAL TO PROVIDE A CYCLE PULSE INDICATIVE TO THE END OF A CYCLE;

AND MEANS RESPONSIVE TO THE CONDITION OF SAID FUNCTIONS AND OPERATIVE TO DISABLE SAID SOURCE OF PERIODIC PULSES FOR A SECOND TIME INTERVAL WHEN A FUNCTION CHANGES ITS CONDITION TO PROVIDE A CHANGE OF CONDITION PULSE INDICATIVE OF A CHANGE OF CONDITION OF A FUNCTION.