Doppler difference collision warning system

• US 3,134,100 A
• Filed: 07/29/1959
• Issued: 05/19/1964
• Est. Priority Date: 07/29/1959
• Status: Expired due to Term

• Current Assignee: Emory Lakatos
• Original Assignee: Emory Lakatos
• Inventors: Lakatos, Emory
• Application Number:
  US03/830,373
• Time in Patent Office: 1,756 Days
• US Class Current: 342/29
• CPC Class Codes: G01S 13/933 of aircraft or spacecraft

Claims

1. A RADIO DOPPLER DIFFERENCE VEHICLE EVASIVE ACTION INDICATING SYSTEM COMPRISING, AT LEAST A PAIR OF SPACED APART SENSING MEANS RESPONSIVE TO INCOMING SIGNALS, FIRST MEANS FOR PROCESSING INCOMING SIGNALS FROM A RELATIVELY MOVING OBJECT RECEIVED BY EACH OF SAID SPACED APART SENSING MEANS TO OBTAIN DOPPLER FREQUENCY SHIFT SIGNALS, MEANS FOR COMPARING SAID DOPPLER FREQUENCY SHIFT SIGNALS FOR OBTAINING A RESULTANT DIFFERENCE SIGNAL, AND THRESHOLD MEANS FOR PROVIDING OUTPUT SIGNALS IN RESPONSE TO AT LEAST ONE CHARACTERISTIC OF SAID DIFFERENCE SIGNAL.

10. A RADIO DOPPLER DIFFERENCE VEHICLE EVASIVE ACTION INDICATING SYSTEM COMPRISING, SPACED APART SENSING MEANS RESPONSIVE TO INCOMING SIGNALS OVER A 360* AZIMUTH, FIRST MEANS FOR SEPARATELY PROCESSING INCOMING SIGNALS FROM A SINGLE RELATIVELY MOVING OBJECT RECEIVED BY SAID SPACED APART SENSING MEANS TO OBTAIN DOPPLER FREQUENCY SHIFT SIGNALS, MEANS FOR COMBINING SAID DOPPLER FREQUENCY SHIFT SIGNALS FOR OBTAINING A DIFFERENCE SIGNAL, THRESHOLD MEANS FOR PROVIDING OUTPUT SIGNALS IN RESPONSE TO THE POLARITY AND MAGNITUDE OF SAID DIFFERENCE SIGNAL, AND INDICATOR MEANS CONNECTED TO SAID THRESHOLD MEANS AND RESPONSIVE TO SAID OUTPUT SIGNALS FOR PROVIDING AN EVASIVE ACTION INDICATION, AND TRANSMITTER MEANS CAPABLE OF EMITTING PULSE RADIO SIGNALS IN ALL DIRECTIONS FROM THE CARRYING VEHICLE FOR PROVIDING SAID INCOMING SIGNALS FROM TRANSMITTED PULSES RETURNING FROM RELATIVELY MOVING VEHICLES.