Dennis W Hollenbeck DeceasedSan Jose, CA

4517154, May 14, 1985

Jul 27, 1982

6/402053

Ulric E. Dennis - San Jose CA
Dennis W. Hollenbeck - San Jose CA
John A. Kirtland - San Jose CA
Kenneth B. Stackhouse - San Jose CA
Patricia A. Wilson - San Jose CA
William D. Hill - San Jose CA
David D. Akers - Los Gatos CA
Elmer D. Hill - Sacramento CA

General Electric Company - San Jose CA

G21C 1700

376259

A self-test system for a nuclear power plant, nuclear reactor protection system is disclosed. Nuclear protection systems are the electronic controls, typically including circuit cards, located intermediate between sensors (as for detecting core overheat) and a control (as for providing rod injection to shut down a reactor). Constant surveillance of the nuclear system protection system is provided by a microprocessor that serially addresses protection system circuit cards and loads them at pre-determined input points with test commands. The addressed cards are thereafter simultaneously activated by a system-wide command. The test command is a pulse which is so short in duration that its affect is transparent to the system and cannot cause overall system operation. The pulse passes through the actuating electrical components to verify, on the real actuating path, the operating integrity of the system. After an appropriate response interval, the output state of the system is recorded in system-wide resident registers.

4498196, Feb 5, 1985

Jul 27, 1982

6/402368

Peter W. Holoyda - San Jose CA
Dennis W. Hollenbeck - San Jose CA
William D. Hill - San Jose CA

General Electric Company - San Jose CA

H04B 900

455607

A testable physically isolated control circuit includes a first unit 10, a second unit 40, and an optical coupler 30 to couple units 10 and 40 together. The functional portion 10a of the first unit includes an input terminal 11 and an oscillator 12 for controlling a first transmitter 17. Signals from the first transmitter are received by a receiver 44 in unit 40 to control the relay 48. Each unit 10 and 40 also includes a testing portion 10b and 40b for monitoring the condition of the functional portions. The testing portion 40b detects the state of the receiver 44 and the relay 48 and transmits this information via transmitter 65 to a receiver 22 in first unit 10. This receiver 22 controls input terminals 29 and 15 to provide control information concerning the proper functioning of the circuit.

4485342, Nov 27, 1984

Jul 27, 1982

6/402373

William D. Hill - San Jose CA
Dennis W. Hollenbeck - San Jose CA
Kenneth M. Schor - Sudbury MA

General Electric Company - San Jose CA

H02J 300
H01H 4728

323351

A testable load driving circuit apparatus includes a solid-state load driver for controlling AC current loads coupled in series with a winding of a saturable core reactor used for sensing the presence or absence of load current through a load current monitor which is coupled to another winding in the reactor. The load driving circuitry may be tested during circuit operation by injecting a signal of insufficient duration to substantially affect the load circuit.

4914530, Apr 3, 1990

Sep 21, 1987

7/098913

Randolph H. Graham - Fremont CA
Dennis W. Hollenbeck - Santa Clara CA

Plus Development Corporation - Milpitas CA

G11B 509

360 48

In a rotating disk drive for storing and retrieving data used by a host system computer, a narrow gap is provided within a data sector format for each concentric data track of the drive. This gap may be normally located at the end of the track, in a speed tolerance buffer region following the last sector. In the event a media defect is detected which otherwise falls within a NAR area for a particular sector, this gap may be shifted to the beginning of the data track, thereby shifting all of the sectors and their NAR areas backward by the width of the gap. The media defect otherwise falling into the NAR area of a particular sector then falls harmlessly into a data field of a preceding sector, and this preceding sector may then be read and mapped out of service by insertion of a spare sector within the physical track without any loss of user data storage capability.

4495655, Jan 22, 1985

Nov 15, 1982

6/442395

Michael R. Benson - San Jose CA
William D. Hill - San Jose CA
Garrett G. OBrien - San Jose CA
Dennis W. Hollenbeck - San Jose CA

General Electric Company - San Jose CA

H04B 900

455603

A testable physically isolated control circuit includes a first unit 10, a second unit 40, and an optical coupler 30 to couple units 10 and 40 together. The functional portion 10a of the first unit includes an input terminal 11 and an oscillator 12 for controlling a first transmitter 17. Signals from the first transmitter are received by a receiver 44 in unit 40 to control the relay 48. Each unit 10 and 40 also includes a testing portion 10b and 40b for monitoring the condition of the functional portions. The testing portion 40b detects the state of the receiver 44 and the relay 48 and transmits this information via transmitter 65 to a receiver 22 in first unit 10. This receiver 22 controls input terminals 29 and 15 to provide control information concerning the proper functioning of the circuit.