Resolution improvement devices

Claim 1

A RESOLUTION IMPROVEMENT DEVICE CAPABLE OF SEPARATING OVERLAPPING PULSE ECHO SIGNALS, COMPRISING: MEANS FOR DETECTING RECURRENT PULSE ECHO SIGNALS SOME OVERLAPPING IN TIME; MEANS CONNECTED TO SAID DETECTOR FOR TIME DELAYING SAID PULSE ECHO SIGNALS FROM SAID DETECTOR A PLURALITY OF FIXED PREDETERMINED TIME INTERVALS LESS THAN THE PULSE WIDTH OF SAID PULSE ECHO SIGNALS; A PLURALITY OF WEIGHTING MEANS ELEMENTS SPACED AT PREDETERMINED INTERVALS ALONG SAID TIME DELAYING MEANS AND OF FIXED PREDETERMINED VALUE, AT LEAST ONE OF SAID WEIGHTING ELEMENTS HAVING A GREATER VALUE THAN AT LEAST ONE OTHER, AND EACH OF SAID WEIGHTING MEANS ELEMENTS THEREBY DERIVING FROM SAID TIME DELAYING MEANS PORTIONS OF SAID RECURRENT PULSE ECHO SIGNALS OF A PHASE AND AMPLITUDE PREDETERMINED BY THE IMPULSE RESPONSE OF SAID DETECTOR; AND MEANS FOR COMBINING SAID DERIVED SIGNALS TO PRODUCE A COMPOSITE SIGNALS FOR EACH OF SAID ECHO SIGNALS HAVING A PEAK SIGNAL AMPLITUDE CONTAINED IN A RELATIVELY NARROW TIME INTERVAL, ALL OF SAID PEAK SIGNALS BEING IN SPACED-APART RELATIONSHIP.