WILLIAM JOSEPH MADDOX
Engineers in Lancaster, PA
License number
Pennsylvania PE011173E
Category
Engineers
Type
Professional Engineer
Address
Address
Lancaster, PA 17601
Personal information
See more information about WILLIAM JOSEPH MADDOX at radaris.comName
Address
Phone
5415 W Montgomery Ave, Philadelphia, PA 19131
Professional information
System For Applying A High Voltage Source To A Crt Through A Capacitive Load
US Patent:
4467224, Aug 21, 1984
Filed:
Mar 18, 1982
Appl. No.:
6/359611
Inventors:
William J. Maddox - Lancaster PA
Assignee:
RCA Corporation - New York NY
International Classification:
H03K 17687, H03K 326
US Classification:
307270
Abstract:
A system for applying a high test voltage to a CRT through a high capacitance load includes two serially connected MOSFETs which have opposite polarities. A video input pulse triggers one MOSFET through an opto-isolation network. The video pulse is delayed and triggers the other MOSFET. The trigger pulses are the same polarity and only one of the MOSFETs can conduct at a given time. The capacitive load is coupled between the MOSFETs and received a high voltage short time pulse when one of the MOSFETs is conductive. The use of two MOSFETs permits the testing of both cathode driven and grid driven CRTs.
Light Transmission Measurement Method
US Patent:
4289406, Sep 15, 1981
Filed:
Mar 9, 1979
Appl. No.:
6/018909
Inventors:
William J. Maddox - Lancaster PA
Assignee:
RCA Corporation - New York NY
International Classification:
G01N 2184, G01N 2186
US Classification:
356429
Abstract:
A method is provided for measuring light transmission through a continuous sheet having an aperture pattern thereon. A light source is positioned on one side of the sheet and a light sensor is positioned on the opposite side of the sheet. The improvement comprises bypassing a portion of the light from the light source around the sheet to the sensor. The bypassed light is used to update the calibration of the measurements.