Lawrey James Chapin

US Patent:

42777712, Jul 7, 1981

Filed:

Nov 9, 1964

Appl. No.:

4/410830

Inventors:

Lawrey H. Chapin - Glendora CA
Robert O. Maze - Minneapolis MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G01S 378

US Classification:

340 27NA

Abstract:

Apparatus for use by the operator of an aircraft in guiding the aircraft, in areas where electric power lines are in operation. Pickup means are located at three or more locations on the aircraft and are used to detect three orthogonal components of the "near field" of the power line, the radiation field at 60 cycles per second being negligible. These components are fed through suitable computing and indicating means to direct the operator in flying the aircraft so that it approaches and then follows the power line, by displaying the angle between craft heading and power line direction, and the craft distance from the power line.