Rand J Eikelberger

US Patent:

20060257204, Nov 16, 2006

Filed:

May 13, 2005

Appl. No.:

11/128586

Inventors:

Jacob Matiosian - Norridge IL, US
Timothy Campion - Schaumburg IL, US
John Talamo - Elgin IL, US
Rand Eikelberger - Chicago IL, US
Carey Pickard - Auckland, NZ

Assignee:

Hye Lites Industries, LLC - Elk Grove IL

International Classification:

E01F 9/06

US Classification:

404016000

Abstract:

A marker for indicating boundaries or delineating traffic lanes in pavement such as roadways or airport runways is described. In an embodiment, the marker includes a high-strength plastic housing containing at least one retroreflective reflector, a light emitting diode (LED), at least one solar collector and a rechargeable battery. The retroreflective reflectors reflect light back to a light source, such as the headlights of a vehicle on a roadway or the light of an airplane on a runway. The LED can provide a light source that can be seen from greater viewing angles than the light reflected by the reflectors providing better visibility to operators of vehicles on curved roadways and allowing captains of airplanes to see the markers from the cockpit at closer range than if the markers used reflectors alone. In an embodiment, the marker also can include circuitry that controls the operation of the LED, the flow of current through the circuit and the charging of the battery.

US Patent:

39719952, Jul 27, 1976

Filed:

Aug 8, 1975

Appl. No.:

5/602938

Inventors:

Rand Jeffrey Eikelberger - Glenview IL

Assignee:

Illinois Tool Works Inc. - Chicago IL

International Classification:

H03H 706

US Classification:

328149

Abstract:

A single-core wheel velocity sensor which is substantially immune to exciter ring or wheel runout is provided by a toroidal-shaped magnetic core, a winding on the core, a bias magnet placed adjacent to the core, an oscillator which supplies a high-frequency signal to the core winding and a sensing circuit comprising a differential input amplifier which has a first input terminal coupled to receive the output signal from the winding of the core through a circuit path which has a relatively low value capacitor coupled from the first terminal to ground and a second terminal which has a circuit path which has a relatively high value capacitor coupled from the second terminal to ground, wherein a relatively low value resistor shunts the low value capacitor and a relatively high value resistor shunts the high value capacitor.

US Patent:

40889777, May 9, 1978

Filed:

Feb 2, 1977

Appl. No.:

5/764771

Inventors:

Joseph H. Bowman - Oak Park IL
Rand J. Eikelberger - Northfield IL
Arnold M. Miller - Schiller Park IL

Assignee:

Illinois Tool Works Inc. - Chicago IL

International Classification:

H01L 4308

US Classification:

338 32R

Abstract:

A contactless linear position sensor, or potentiometer, which has a linear output characteristic, is constructed with a pair of elongated, hollow cylindrical tubes which are made of magnetically saturable material and are aligned so that their axes form an angle of less than 180. degree. , with both of said tubes having at least one conductive wire coupled therewith which is interconnected with the wire that is coupled with the other tube, and a moveable permanent magnet which is formed as a segment of a circular ring with a pair of straight sides that move adjacent to the tubes so that the total volume of the tubes that is magnetically saturated remains substantially constant while the inductance ratio of the tubes varies. The present invention is directed to a version of this type of contactless device which has improved temperature performance that is achieved by the use of a magnetically permeable pole piece positioned adjacent the moving magnet which is substantially the same shape as the magnet and the magnetically permeable flux enhancer which is positioned so that the tubes are located intermediate the flux enhancer and the moveable magnet.