Electronic location and guidance system

• US 3,206,751 A
• Filed: 10/06/1959
• Issued: 09/14/1965
• Est. Priority Date: 10/06/1959
• Status: Expired due to Term

• Current Assignee: Ashley Knight Sheldon
• Original Assignee: Ashley Knight Sheldon
• Inventors: ASHLEY KNIGHT SHELDON
• Application Number:
  US03/844,723
• Time in Patent Office: 2,170 Days
• US Class Current: 342/396
• CPC Class Codes: G01S 1/02 using radio waves G01S19/00 takes precedence
• CPC Class Codes: G01S 1/304 Analogous systems in which a beat frequency, obtained by heterodyning the signals, is compared in phase with a reference signal obtained by heterodyning the signals in a fixed reference point and transmitted therefrom, e.g. LORAC (long range accuracy) or TORAN systems
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: G05D 1/028 using a RF signal

Claims

1. IN A VEHICLE GUIDANCE SYSTEM IN WHICH A PLURALITY OF SIGNALS ARE RECEIVED AT THE VEHICLE AND THE CHARACTERISTICS OF THE RECEIVED SIGNALS ARE INDICATIVE OF THE POSITION OF SAID VEHICLE, FIRST MEANS FOR CONVERTING SAID SIGNALS INTO SECOND SIGNALS DEPENDENT UPON THE TIME RATE OF CHANGE OF SAID CHARACTERISTICS, GUIDING MEANS FOR GUIDING SAID VEHICLE AND HAVING A PLURALITY OF CONTROL CHANNELS, AND SECOND MEANS CONNECTED TO SAID FIRST MEANS CONTROLLED BY THE SECOND SIGNAL CORRESPONDING TO THE CHARACTERISTIC HAVING THE GREATEST TIME RATE TO CHANGE AND BY THE DIRECTION OF CHANGE THEREOF FOR SUPPLYING CONTROL SIGNALS HAVING A PREDETERMINED RELATION TO SAID CHARACTERISTICS TO PREDETERMINED ONES OF SAID CHANNELS.