Random control for power-driven unit

• US 3,128,840 A
• Filed: 04/23/1962
• Issued: 04/14/1964
• Est. Priority Date: 04/23/1962
• Status: Expired due to Term

• Current Assignee: Arthur M. Barrett Jr
• Original Assignee: Arthur M. Barrett Jr
• Inventors: Barrett, Arthur M. Jr.
• Application Number:
  US04/189,642
• Time in Patent Office: 722 Days
• US Class Current: 180/167
• CPC Class Codes: A01B 69/008 automatic
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 34/008 for automated or remotely controlled operation
• CPC Class Codes: G05D 1/0265 using buried wires
• CPC Class Codes: Y10S 56/15 Condition responsive

Claims

1. FOR USE IN A GUIDANCE SYSTEM IN WHICH A SIGNALRADIATING BOUNDARY-DEFINING MEANS SUBSTANTIALLY ENCLOSES AN AREA TO BE TRAVERSED BY A MOBILE UNIT HAVING BOTH PROPULSION MEANS AND STEERING MEANS, THE COMBINATION OF CONTROL MEANS ON SAID MOBILE UNIT INCLUDING SENSING MEANS FOR PROVIDING OUTPUT SIGNALS FROM THE SIGNALS RADIATED BY SAID BOUNDARY-DEFINING MEANS HAVING CHARACTERISTICS WHICH VARY WITH THE POSITION OF THE UNIT RELATIVE TO THE BOUNDARYDEFINING MEANS, AND SIGNAL RESPONSIVE MEANS INCLUDING STEERING CONTROL MEANS OPERATIVELY CONTROLLED TO ADJUST THE POSITION OF SAID STEERING MEANS, AND SWITCHING MEANS HAVING A FIRST POSITION FOR COUPLING THE GENERATED STEERING SIGNALS TO SAID SIGNAL RESPONSIVE MEANS TO CONTROL SAME TO MAINTAIN SAID UNIT ON A COURSE DEFINED BY SAID BOUNDARYDEFINING MEANS, AND A SECOND POSITION FOR COUPLING SAID GENERATED STEERING SIGNALS TO SAID SIGNAL RESPONSIVE MEANS TO CONTROL SAME TO TURN SAID UNIT TO A COURSE DIRECTED AWAY FROM SAID BOUNDARY DEFINING MEANS RESPONSIVE TO DETECTION OF A SIGNAL THEREFROM BY SAID SENSING MEANS.