MICHAL MARCELI FEILCHENFELD
Engineers in Pittsburgh, PA

License number
Pennsylvania PE001332K
Category
Engineers
Type
Professional Engineer
Address
Address
Pittsburgh, PA 15235

Personal information

See more information about MICHAL MARCELI FEILCHENFELD at radaris.com
Name
Address
Phone
Michal Feilchenfeld
2015 Hampstead Dr, Pittsburgh, PA 15235

Professional information

Michal Feilchenfeld Photo 1

Voice-Recognition Elevator Security System

US Patent:
4590604, May 20, 1986
Filed:
Jan 13, 1983
Appl. No.:
6/457788
Inventors:
Michal M. Feilchenfeld - Pittsburgh PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G10L 100
US Classification:
381 42
Abstract:
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.


Michal Feilchenfeld Photo 2

Voice-Recognition Elevator Security System

US Patent:
4534056, Aug 6, 1985
Filed:
Aug 26, 1982
Appl. No.:
6/411792
Inventors:
Michal M. Feilchenfeld - Pittsburgh PA
Roger G. Byford - Washington Township, Armstrong County PA
Wing C. Quan - Waldwick NJ
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G10L 100
US Classification:
381 42
Abstract:
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.


Michal Feilchenfeld Photo 3

Method And Apparatus For Preventing Inadvertent Criticality In A Nuclear Fueled Electric Powering Generating Unit

US Patent:
4582672, Apr 15, 1986
Filed:
Aug 11, 1982
Appl. No.:
6/407231
Inventors:
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
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G21C 1700
US Classification:
376254
Abstract:
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.


Michal Feilchenfeld Photo 4

Digital, Electromagnetic Rod Position Indicator With Precisely Controlled Transitions Between Digital States

US Patent:
4646012, Feb 24, 1987
Filed:
Jan 24, 1984
Appl. No.:
6/573459
Inventors:
Michal M. Feilchenfeld - Churchill PA
Charles G. Geis - N. Huntingdon PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G01B 714, G01N 2772, G08C 1906, G01F 2500
US Classification:
324208
Abstract:
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.


Michal Feilchenfeld Photo 5

Position Indicating Device

US Patent:
4711757, Dec 8, 1987
Filed:
Feb 27, 1986
Appl. No.:
6/833933
Inventors:
Michal M. Feilchenfeld - Pittsburgh PA
Grant R. Connors - Penn Hills PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G21C 1700, G01R 3300
US Classification:
376258
Abstract:
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.


Michal Feilchenfeld Photo 6

Digital Video Line Delay Circuit

US Patent:
4298859, Nov 3, 1981
Filed:
May 21, 1980
Appl. No.:
6/151861
Inventors:
Michal M. Feilchenfeld - Pittsburgh PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G06K 7016
US Classification:
3401463Z
Abstract:
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.


Michal Feilchenfeld Photo 7

Multi-Line Scan Mark Verification Circuit

US Patent:
4357596, Nov 2, 1982
Filed:
May 30, 1980
Appl. No.:
6/154742
Inventors:
Michal M. Feilchenfeld - Penn Hills PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G06K 714
US Classification:
3401463Z
Abstract:
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.


Michal Feilchenfeld Photo 8

Optical Path Monitoring Circuit For A Document Scanner

US Patent:
4356390, Oct 26, 1982
Filed:
Mar 11, 1981
Appl. No.:
6/242755
Inventors:
Michal M. Feilchenfeld - Pittsburgh PA
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G06K 900
US Classification:
235455
Abstract:
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.


Michal Feilchenfeld Photo 9

Monitoring Circuit

US Patent:
4099668, Jul 11, 1978
Filed:
Oct 29, 1976
Appl. No.:
5/736796
Inventors:
Michal M. Feilchenfeld - Pittsburgh PA
Kenneth E. Daggett - Monroeville PA
Raymond A. Lloyd - Laurel MD
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G06F 1100, G01R 1512
US Classification:
235304
Abstract:
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.


Michal Feilchenfeld Photo 10

Digital Monitor

US Patent:
4059749, Nov 22, 1977
Filed:
Nov 9, 1976
Appl. No.:
5/740280
Inventors:
Michal M. Feilchenfeld - Pittsburgh PA
Assignee:
Westinghouse Electric Corporation - Pittsburgh PA
International Classification:
G06F 1100
US Classification:
235302
Abstract:
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.