Donald V Comiskey

US Patent:

20060077699, Apr 13, 2006

Filed:

Oct 12, 2004

Appl. No.:

10/962938

Inventors:

Donald Comiskey - West Chicago IL, US

International Classification:

H02M 7/04

US Classification:

363089000

Abstract:

A sense circuit is provided connected to a control loop of a circuit having an output. The sense circuit receives a signal derived from the output of the circuit and provides a controlling signal to the control loop. In one embodiment, the sense circuit is connected to the output of a switching power supply and monitors the switched output to ensure that the main output of the power supply is kept within predetermined thresholds. The sense circuit includes first and second comparators comparing the switched output, in one embodiment, to a reference voltage, on one hand, and comparing the main output signal to the reference voltage, on the other hand.

US Patent:

60346094, Mar 7, 2000

Filed:

Jan 20, 1999

Appl. No.:

9/234346

Inventors:

Donald V. Comiskey - West Chicago IL

International Classification:

G08G 1097

US Classification:

340631

Abstract:

A traffic-control sign that automatically displays a primary message, such as "STOP", when electrical power is absent, and an optional secondary message, such as "We Arrest Drunk Drivers", when electrical power is present. The motorless sign is continually encompassed by an enclosure having a transparent facade. A plurality of pivotally-mounted louver panels arranged in a louvered fashion are viewable through the transparent facade. A linkage rod interconnecting the panels provides for unison rotation of the panels. The linkage rod communicates with a solenoid so that the panels assume two distinct positions dependent on the state of the solenoid. These distinct positions reveal primary and secondary viewing surfaces to which the respective messages are affixed. Panel travel approximating 180 degrees allows the messages to be displayed on the overall viewing surfaces formed by the combined individual panel surfaces. Panel travel approximating 90 degrees allows one message to be displayed on the panels and the other message to be displayed on a separate viewing surface located behind the panels.

US Patent:

54951500, Feb 27, 1996

Filed:

Mar 3, 1995

Appl. No.:

8/398242

Inventors:

Robert M. Zawislak - Palatine IL
Donald A. Brichta - Western Springs IL
Donald V. Comiskey - West Chicago IL

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

G05F 100

US Classification:

315294

Abstract:

A series of arc lamps each has an inductor connected in series with its anode which is field-coupled to a similar inductor connected to its cathode, the inductors being connected in series with each other through the inductors between an arc lamp power supply and a high current modulator for illuminating the arc lamps, once ignited. Ignition takes place serially from a single source of high voltage through respective charging networks, the charge time of each network being different from the others so as to successively create arcs in the arc lamps in sequence. The high voltage used for initial ignition of the arc lamps is differentially balanced to ground by means of the coils in series with the cathode and anode respectively of each arc lamp. The coils are poled so that the buildup of field in each coupled pair oppose each other, thereby rendering the coils invisible to the high current modulation during illumination of the arc lamps.