John W Korth

US Patent:

44172370, Nov 22, 1983

Filed:

Jun 4, 1981

Appl. No.:

6/270582

Inventors:

John K. Korth - Mount Prospect IL

International Classification:

G08B 2100

US Classification:

340686

Abstract:

An apparatus includes having a pair of spaced-apart right and left misalignment sensors which are adapted to be positioned on opposite sides of the wheel under test, and an electrical circuit for producing electrical signals when misalignments are sensed and for supplying them to a pair of visible light-emitting indicating devices which, in turn, provide visually discernible misalignment indicating information in response to the electrical signals. The method for detecting and indicating wheel misalignments includes the steps of placing the wheel between two spaced-apart oppositely-disposed misalignment sensors, rotating the wheel about its axis, producing electrical signals in response to the sensors detecting wheel misalignments, and observing indicating devices which respond to the electrical signals when the sensors detect misalignments of the wheel. In one form of the invention, the sensors each include a spring-loaded probe, and in the other two disclosed forms of the invention, the electrical circuit includes voltage-controlled oscillators.