MICHAL MARCELI FEILCHENFELD
Engineers in Pittsburgh, PA

4590604, May 20, 1986

Jan 13, 1983

6/457788

Michal M. Feilchenfeld - Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

G10L 100

381 42

A voice-controlled elevator security system. Access to an elevator system servicing a plurality of landings of a structure is controlled by comparing a voice signal of a potential user of the elevator system with stored voice signals of all authorized users. The comparison is accomplished by first digitizing the potential user's voice signal and comparing it, on a bit-by-bit basis, with a digital representation of the voice signals of all authorized users. If the comparison satisfies an established criterion, the potential user is determined to be an authorized user. Once this determination has been made, the authorized user can initiate car call signals for those landings to which the authorized user is permitted access. An authorized user can also temporarily modify the previous digital representation of the voice signal when the authorized user is suffering from laryngeal indisposition.

4534056, Aug 6, 1985

Aug 26, 1982

6/411792

Michal M. Feilchenfeld - Pittsburgh PA
Roger G. Byford - Washington Township, Armstrong County PA
Wing C. Quan - Waldwick NJ

Westinghouse Electric Corp. - Pittsburgh PA

G10L 100

381 42

A voice-controlled elevator security system. Access to an elevator system servicing a plurality of landings of a structure is controlled by comparing a voice signal of a potential user of the elevator system with stored voice signals of all authorized users. The comparison is accomplished by first digitizing the potential user's voice signal and comparing it, on a bit-by-bit basis, with a digital representation of the voice signals of all authorized users. Various criteria can be established for determining the number of binary bits that must agree to conclude that the potential user is an authorized user. Once this determination has been made, the authorized user can initiate car call signals for those landings to which the authorized user is permitted access.

4582672, Apr 15, 1986

Aug 11, 1982

6/407231

Charles R. Tuley - Penn Township, Westmoreland County PA
Douglas A. Bauman - Murrysville PA
Michal M. Feilchenfeld - Pittsburgh PA
Lesley Greenberg - Monroeville PA
James A. Neuner - Gibsonia PA

Westinghouse Electric Corp. - Pittsburgh PA

G21C 1700

376254

An inadvertent approach to criticality in a nuclear fueled electric power generating unit is detected and an alarm is generated through on-line monitoring of the neutron flux. The difficulties of accurately measuring the low levels of neutron flux in a subcritical reactor are overcome by the use of a microcomputer which continuously generates average flux count rate signals for incremental time periods from thousands of samples taken during each such period and which serially stores the average flux count rate signals for a preselected time interval. At the end of each incremental time period, the microcomputer compares the latest average flux count rate signal with the oldest, and preferably each of the intervening stored values, and if it exceeds any of them by at least a preselected multiplication factor, an alarm is generated. The interval and multiplication factor are chosen such that an alarm is generated early enough in the event to provide adequate time for an automatic system or the operator to take action which prevents the reactor from going critical yet minimizes the likelihood of a spurious response. As applied to a pressurized water reactor system, boron dilution events are detected in time that the chemical and volume control system can be isolated and the valves for the refueling water storage tank can be opened to inject highly borated water into the reactor coolant system to keep the reactor subcritical.

4646012, Feb 24, 1987

Jan 24, 1984

6/573459

Michal M. Feilchenfeld - Churchill PA
Charles G. Geis - N. Huntingdon PA

Westinghouse Electric Corp. - Pittsburgh PA

G01B 714, G01N 2772, G08C 1906, G01F 2500

324208

A digital rod position indicator having discrete coils spaced along the travel path of an elongated magnetically permeable member stores in digital form compensation signals for automatically adjusting the location relative to the coils at which the digital output signal representative of the position of the end of the elongate member transitions from one code to the next. The appropriate compensation signal is addressed using the digital output signal and a correction factor which takes into account the direction of movement including reversals.

4711757, Dec 8, 1987

Feb 27, 1986

6/833933

Michal M. Feilchenfeld - Pittsburgh PA
Grant R. Connors - Penn Hills PA

Westinghouse Electric Corp. - Pittsburgh PA

G21C 1700, G01R 3300

376258

Position indicating device for producing an indication of the position of a displaceable structure, the device including: a plurality of sensing elements extending along a defined path such that each element is associated with a respective location along the defined path, each element being operative to respond to the presence of a position representing member when the member extends from a starting point to the respective location associated with that element, the elements being coupled into respective pairs of elements, with each pair of elements having an output producing a signal only when a single element of its respective pair is responding to the presence of the member; a plurality of signal producing members each operative for producing a signal representing a predetermined logic state in response to a predetermined input signal; and circuit components operatively connecting the outputs to the signal producing members for causing a signal at each output to produce a predetermined input signal at a corresponding signal producing member and for causing a predetermined input signal to be produced at at least one signal producing member by a signal at at least two of the outputs.

4298859, Nov 3, 1981

May 21, 1980

6/151861

Michal M. Feilchenfeld - Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

G06K 7016

3401463Z

Shift registers are employed in a video line delay circuit coupling the output of an analog to digital converter to a digital processor in a line scan camera document reading system to permit a prescribed delay in the transmission of data to avoid loss of data appearing on a document prior to the document scan mark which is used for enabling the digital processor.

4357596, Nov 2, 1982

May 30, 1980

6/154742

Michal M. Feilchenfeld - Penn Hills PA

Westinghouse Electric Corp. - Pittsburgh PA

G06K 714

3401463Z

In a document scanning scheme where data is preceded on the document by a preprinted document scan mark, circuitry is employed to utilize multiple line scans of the scan mark by a line scan camera to verify the presence of a scan mark and avoid erroneous response to random marks on the document.

4356390, Oct 26, 1982

Mar 11, 1981

6/242755

Michal M. Feilchenfeld - Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

G06K 900

235455

The light levels reflected from a predetermined blank portion of an optically scanned document are monitored. The presence of dirt or smudges in the optical path which could adversely affect the validity of the information read from the document.

4099668, Jul 11, 1978

Oct 29, 1976

5/736796

Michal M. Feilchenfeld - Pittsburgh PA
Kenneth E. Daggett - Monroeville PA
Raymond A. Lloyd - Laurel MD

Westinghouse Electric Corp. - Pittsburgh PA

G06F 1100, G01R 1512

235304

A monitoring circuit for digital circuits is disclosed. The monitor is primarily applicable to digital circuits which operate in a cyclic mode with the digital patterns generated during each cycle being repeated in a predictable manner. A predetermined number of expected bit patterns are stored in a programmable memory. The stored bit patterns correspond on a bit-by-bit basis to the bit patterns generated by the circuit being monitored when this circuit is operating normally. In the self-scan mode each pattern generated by the circuit being monitored is compared to each of the patterns stored in the memory in a sequential manner. Each time a pattern generated by the circuit being monitored is found to identically correspond to a pattern stored in the memory a valid pattern pulse is generated which steps a down counter one count. If this process does not result in the down counter being stepped the expected number of times during the operating cycle, a flip-flop is set indicating that the circuit being monitored has malfunctioned. Provisions are also included for counting the transitions of a digital signal during predetermined portions of the cycle of the circuit being monitored and for monitoring the polarity and amplitude of a predetermined number of analog voltages.

4059749, Nov 22, 1977

Nov 9, 1976

5/740280

Michal M. Feilchenfeld - Pittsburgh PA

Westinghouse Electric Corporation - Pittsburgh PA

G06F 1100

235302

A monitor for checking a plurality of multi-bit digital patterns generated by a system being monitored to determine that each pattern is valid, that each of the patterns appear in the right sequence and that the total number of valid patterns detected during the testing cycle is as expected is disclosed. Additionally, the bit patterns are monitored to detect unexpected transitions. The results of these tests are then combined to form a composite malfunction signal indicative of the operational status of the system being monitored.