Mark L Weiss

US Patent:

45634270, Jan 7, 1986

Filed:

Oct 28, 1983

Appl. No.:

6/546597

Inventors:

Mark D. Weiss - Rockville MD
Stephen W. Christoffersen - Falls Church VA

International Classification:

G01N 3100
G01N 1700

US Classification:

436 6

Abstract:

A corrosion test assembly adapted for operative placement in a flowing gaseous medium for subjection to corrosive materials therein, more particularly, in scrubber systems, the assembly including a support and mounting means removably attachable to an outer surface of a component containing a flowing gaseous medium wherein at least one corrosion test specimen or coupon is mounted on the support and mounting means, with the test member extendable into the gaseous medium, wherein the test specimen is subjected to corrosive action by corrosive materials in the gaseous medium.

US Patent:

50088050, Apr 16, 1991

Filed:

Aug 3, 1989

Appl. No.:

7/389023

Inventors:

Carolyn A. B. Fiebig - Burtonsville MD
Mike R. Fuqua - Frederick MD
Suresh K. Gursahaney - Gaithersburg MD
Gregg M. Margosian - Germantown MD
Mark H. Weiss - Gaithersburg MD

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1120

US Classification:

364184

Abstract:

A real time control system is disclosed for controlling the sequential execution of scheduled operatons such as in process control or broadcast scheduling applications. The system uses a fail safe feature characterized as a sender/listener architecture. An external clock input to the sender and the listener assures synchronous sequential stepping through identical schedules stored in each processor. Under normal operation, the sender processor controls the execution of events as they are sent from a host computer connected to the system, Unscheduled events or errors are processed by being added to the schedule in real time for both the sender and listener processors. The listener processor monitors the sender's signaling in the controlled network and, in the case of a failure in the sender, the listener immediately assumes control of the system as the new sender. The listener executes commands which were omitted by the failing sender during the takeover interval and it then resumes the originally intended schedule of process control events.

US Patent:

47928905, Dec 20, 1988

Filed:

Dec 31, 1985

Appl. No.:

6/815434

Inventors:

Brian E. Blair - Raleigh NC
Mark H. Weiss - Raleigh NC

Assignee:

International Business Machines Corp. - Armonk NY

International Classification:

G06F 900

US Classification:

364200

Abstract:

A method for controlling a processor in a data processing system so that multiple events are serviced on a single interrupt level. On the occurrence of a first interrupt request the processor is forced to run the routine that services the interrupt in a background mode. This is accomplished by immediately clearing the interrupt source, thus permitting the processor to accept new interrupt requests on the same level. On the occurrence of a second interrupt request, at the same level, the processor branches from executing the first interrupt routine on the background mode to service the second interrupt request on an interrupt level or foreground mode.