Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
229 words
An acoustical navigational light system having a transmitter and at least one receiver for controlling the actuation of a marine navigational aid connected to each of the transmitter and the receiver comprising, said transmitter including, a crystal oscillator timing clock, digital counter means connected to the clock output, a programmed digital read only memory connected to the counter output and providing a coded signal output of short and time related pulses of less than one second duration for transmission through the water to the receiver, a navigational light aid connected to and receiving an actuating signal from the counter means, said receiving including, a crystal oscillator timing clock, digital counter means connected to the clock output for providing timing signals, a navigational light air connected to and receiving an actuating signal from the counter means, a detector for detecting the coded acoustical signal from the transmitter, second digital counter means receiving said coded acoustical signal, a programmed digital read only memory connected to the second counter means and having a coded memory providing an output identical to the coded signal output of the transmitter memory, a digital comparator connected to the dectector and to the receiver memory for determining if the proper actuating code is received by the receiver, said comparator connected to and resetting the first counter means when the receiver receives a correct signal from the transmitter.
Claim 2
Dependent Claim
229 words
An acoustical navigational light system having a transmitter and at least one receiver for controlling the actuation of a marine navigational aid connected to each of the transmitter and the receiver comprising, said transmitter including, a crystal oscillator timing clock, digital counter means connected to the clock output, a programmed digital read only memory connected to the counter output and providing a coded signal output of short and time related pulses of less than one second duration for transmission through the water to the receiver, a navigational light aid connected to and receiving an actuating signal from the counter means, said receiving including, a crystal oscillator timing clock, digital counter means connected to the clock output for providing timing signals, a navigational light air connected to and receiving an actuating signal from the counter means, a detector for detecting the coded acoustical signal from the transmitter, second digital counter means receiving said coded acoustical signal, a programmed digital read only memory connected to the second counter means and having a coded memory providing an output identical to the coded signal output of the transmitter memory, a digital comparator connected to the dectector and to the receiver memory for determining if the proper actuating code is received by the receiver, said comparator connected to and resetting the first counter means when the receiver receives a correct signal from the transmitter.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein the code provided by the memory of the transmitter and the receiver includes a plurality of spaced signal pulses separated by non-pulses.
Claim 4
Dependent Claim
30 words
The apparatus of claim 1 wherein the receiver includes, a lockout circuit which inhibits the control of the receiver by the transmitter when environmental acoustical signals exceed a predetermined level.
Claim 5
Dependent Claim
27 words
The apparatus of claim 2 including, a lockout circuit which includes means for resetting the receiver unless a relatively noise free period proceeds each spaced signal pulse.