Radio ranging device

• US 3,243,812 A
• Filed: 04/15/1963
• Issued: 03/29/1966
• Est. Priority Date: 04/15/1963
• Status: Expired due to Term

• Current Assignee: Robert W. Williams
• Original Assignee: Robert W. Williams
• Inventors: Williams, Robert W.
• Application Number:
  US04/273,167
• Time in Patent Office: 1,079 Days
• US Class Current: 342/125
• CPC Class Codes: G01S 13/84 for distance determination by phase measurement

Claims

1. THE COMBINATION COMPRISING:

FIRST MEANS FOR TRANSMITTING A WAVE OF VARIABLE WAVELENGTH FROM A FIRST STATION TO A SECOND STATION, THE WAVELENGTH OF SAID WAVE BEING DECREASED FROM AN INITIAL VALUE THAT IS GREATER THAN THE ROUND TRIP SIGNAL TRANSMISSION DISTANCE BETWEEN SAID FIRST AND SECOND STATIONS TO A FINAL VALUE THAT IS A FRACTION OF SAID DISTANCE;

SECOND MEANS AT SAID SECOND STATION FOR RETURNING SAID WAVE TO SAID FIRST STATION;

AND THIRD MEANS AT SAID FIRST STATION FOR DETERMINING THE ROUND TRIP SIGNAL TRANSMISSION DISTANCE BETWEEN SAID FIRST AND SECOND STATIONS IN TERMS OF THE FINAL NUMBER OF WAVELENGTHS PLUS ANY FRACTION THEREOF EXISTING BETWEEN SAID STATIONS.