HAROLD A WILLIAMS
Engineering in Columbus, OH
License number
Massachusetts 22802
Expiration Date
Jun 30, 1984
Type
Mechanical Engineer
Address
Address
Columbus, OH 43221
Professional information
Inductance Controller With Load Regulator
US Patent:
5825164, Oct 20, 1998
Filed:
Dec 21, 1995
Appl. No.:
8/576799
Inventors:
Harold Richard Williams - Columbus OH
Assignee:
ADB-Alnaco, Inc. - Columbus OH
International Classification:
G05F 114
US Classification:
323255
Abstract:
A method for changing the inductance of a multiple-tap transformer in a circuit having a current regulator and the transformer, including the steps of comparing the current regulator's duty-cycle to a duty-cycle setpoint, increasing the turns ratio of the transformer when the duty-cycle is less than the setpoint. An apparatus for switching the taps of a multiple-tap transformer connected to a power supply and a load circuit, including a load regulator for generating a desired duty-cycle signal, and an inductance controller having a first reference signal generator, a comparator for comparing the reference signal to the desired duty-cycle, and relays connected to the transformer taps that are responsive to the comparator.
Ground Fault Detection And Measurement System For Airfield Lighting System
US Patent:
5638057, Jun 10, 1997
Filed:
May 9, 1994
Appl. No.:
8/239478
Inventors:
Harold R. Williams - Columbus OH
Assignee:
ADB-Alnaco, Inc. - Columbus OH
International Classification:
G08G 500
US Classification:
340947
Abstract:
The present invention includes an airfield lighting and control system for energizing at least one airfield control device and containing a ground fault detection system, comprising: (1) at least one airfield control device; (2) an AC electrical circuit conducting an AC signal and connected to said at least one airfield control device; (3) an inductive device, in electrical contact with said AC electrical circuit, which comprises (a) an inductive coil having an input pole and an output pole, and being loaded by a capacitor; (b) a driver winding for the inductive coil, the driver winding adapted to sense AC current flow through the inductor coil; (c) a sampling resistor connected to the driver winding and adapted to detect AC current in the form of a voltage across the sampling resistor; (d) signal processing circuitry comprising: (1) an inverting amplifier adapted to amplify the voltage; and (2) a phase shifter adapted to shift the phase of the voltage; and (e) a power amplifier connected to the signal processing circuitry and to the driver winding.
Airfield Lighting System
US Patent:
5485151, Jan 16, 1996
Filed:
May 6, 1993
Appl. No.:
8/059023
Inventors:
Edwin K. Runyon - Gahanna OH
Harold R. Williams - Columbus OH
Todd E. McCorkle - Newark OH
Mark E. Weihs - Toledo OH
Earl R. Williams - Columbus OH
Harold R. Williams - Columbus OH
Todd E. McCorkle - Newark OH
Mark E. Weihs - Toledo OH
Earl R. Williams - Columbus OH
Assignee:
ADB-Alnaco, Inc. - Columbus OH
International Classification:
B64F 118
US Classification:
340953
Abstract:
A microprocessor-controlled airfield lighting control and monitoring system having bi-directional communication between the controlling microprocessor and the airfield lights and/or sensors. The system also includes a metal container for the remote control microprocessor and an improved attachment arrangement for the power transistor associated therewith. A DC power supply is connected to the remote controller microprocessor and has an integrated circuit adapted to sense a threshold voltage, which causes the power transistor to short around the associated power source.
Airfield Lighting System
US Patent:
5969642, Oct 19, 1999
Filed:
Sep 30, 1996
Appl. No.:
8/722400
Inventors:
Edwin K. Runyon - Gahanna OH
Harold R. Williams - Columbus OH
Todd E. McCorkle - Newark OH
Mark E. Weihs - Toledo OH
Earl R. Williams - Columbus OH
Harold R. Williams - Columbus OH
Todd E. McCorkle - Newark OH
Mark E. Weihs - Toledo OH
Earl R. Williams - Columbus OH
Assignee:
Siemens Energy & Automation, Inc. - Alpharetta GA
International Classification:
B64F 118, G08G 500
US Classification:
340953
Abstract:
A microprocessor-controlled airfield lighting control and monitoring system having bi-directional communication between the controlling microprocessor and the airfield lights and/or sensors. The system also includes a metal container for the remote control microprocessor and an improved attachment arrangement for the power transistor associated therewith. A DC power supply is connected to the remote controller microprocessor and has an integrated circuit adapted to sense a threshold voltage, which causes the power transistor to short around the associated power source.
Method And Apparatus For Separating And Analyzing Composite Ac/Dc Waveforms
US Patent:
5872457, Feb 16, 1999
Filed:
Mar 7, 1996
Appl. No.:
8/611963
Inventors:
Harold Richard Williams - Columbus OH
Assignee:
ADB-Alnaco, Inc. - Columbus OH
International Classification:
G01R 2726
US Classification:
324654
Abstract:
The present invention includes a method for separating AC and DC components of a composite waveform, and an inductive device capable of performing the method. The present invention also includes a ground fault condition monitoring system containing an inductive device of the present invention, and an electrical distribution system containing such a ground fault condition monitoring system, such as one for a lighting system.
Method And Apparatus For Separating And Analyzing Composite Ac/Dc Waveforms
US Patent:
5648723, Jul 15, 1997
Filed:
May 9, 1994
Appl. No.:
8/239812
Inventors:
Harold Richard Williams - Columbus OH
Assignee:
ADB-Alnaco, Inc. - Columbus OH
International Classification:
G01R 3114
US Classification:
324509
Abstract:
The present invention includes a method for separating AC and DC components of a composite waveform, and an inductive device capable of performing the method. The present invention also includes a ground fault condition monitoring system containing an inductive device of the present invention, and an electrical distribution system containing such a ground fault condition monitoring system, such as one for a lighting system.