Communication system especially useful as an incident location reporting security system
First Claim
1. A communications system including a central receiver and a plurality of transmitters wherein each transmitter transmits to the central receiver, the system comprising:
- means in each transmitter for generating a modulated code particular to that transmitter, the code generating means including;
code determining means having a plurality circuit elements, each circuit element having a plurality of different pulse-width modes, means for setting each element in one of the modes to provide each transmitter with a unique code, wherein the number of codes available to the transmitter is determined by the number of modes raised to the power of the number of circuit elements;
means in each transmitter for generating a carrier signal for transmitting the modulated code of that transmitter to the receiver as a coded train;
means in the central receiver responsive to the carrier signal; and
means in the central receiver for reading the code of a transmitter carried by the carrier signal upon receipt thereof by the receiver to identify the particular transmitter transmitting the code.
0 Assignments
0 Petitions
Accused Products
Abstract
The Incident Location Reporting Security System pertains to a device that is capable of determining instantaneously, via the use of pulse-width coded modulation, the location of incidences such as burglary, robbery and fire. Detailed multi-point monitoring can be carried out in such varied sites in a multistory buildings, residential neighborhoods, museums or individuals. The concept allows for generation and reading of billions of different codes through the simplistic design of a coded receiver wherein codes are read instead of matched. In achieving this capability, a base number is created by multiplying the plurality of positions of a switch times the number of switches and thereafter pulsing a transmitter a number of times to generate a code in which the base number is raised to the power of the number of times it is pulsed. Each transmitter is assigned a specific coded number and a single receiver rapidly processes and identifies any coded number received. In order to identify the position of an individual immediately at the time an alarm is sounded, triangulation is used.
-
Citations
24 Claims
-
1. A communications system including a central receiver and a plurality of transmitters wherein each transmitter transmits to the central receiver, the system comprising:
-
means in each transmitter for generating a modulated code particular to that transmitter, the code generating means including; code determining means having a plurality circuit elements, each circuit element having a plurality of different pulse-width modes, means for setting each element in one of the modes to provide each transmitter with a unique code, wherein the number of codes available to the transmitter is determined by the number of modes raised to the power of the number of circuit elements; means in each transmitter for generating a carrier signal for transmitting the modulated code of that transmitter to the receiver as a coded train; means in the central receiver responsive to the carrier signal; and means in the central receiver for reading the code of a transmitter carried by the carrier signal upon receipt thereof by the receiver to identify the particular transmitter transmitting the code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A communications system including a central receiver system and a plurality of transmitters wherein each transmitter is identified with a particular station and each transmitter transmits to the central receiver, the system comprising:
-
means in each transmitter for generating a pulse-width modulated code particular to that transmitter, the code generating means including; switching means having a plurality of switches each of which has a plurality of different pulse-width modes, means for setting each switch in one of the pulse-width modes to provide each transmitter with a base number, and means for pulsing the transmitter a predetermined number of times, wherein the number of codes available to all transmitters is determined by the base number raised to a power equal to the number of times the transmitter is pulsed; means in each transmitter for generating a carrier signal for transmitting the pulse-width modulated code of that transmitter to the central receiver system as a coded pulse train; means in the central receiver system for reading the code of a transmitter upon receipt thereof by the receiver to identify the particular transmitter transmitting the code. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
Specification