Zvi H Meiksin

US Patent:

6370396, Apr 9, 2002

Filed:

May 25, 2000

Appl. No.:

09/578757

Inventors:

Zvi H. Meiksin - Pittsburgh PA
T. Brad Petrus - Pittsburgh PA
Robert J. Kilgore - Pittsburgh PA

Assignee:

Transtek, Inc. - Pittsburgh PA

International Classification:

H04M 1106

US Classification:

455560, 455557, 455561

Abstract:

A method and system for communication within an energy-transmission-limited environment. RF transceivers throughout the site are located site-wide such that areas within the site in which communications are desired are within range of at least one of the RF transceivers. At each location RF transceivers are connected to a control unit. The control unit provides power to the transceivers and allows bi-directional communication of audio/voice and/or digital information. The control units may be networked to each other using standard network type category-5 or equivalent cables and may communicate to one another via the network connection. The control units may also be networked via an alternating current powerline by using an alternating current modem. The transceiver of the present invention utilizes single sideband modulators to modulate voice and/or digital signals. The signals are demodulated and filtered at a receiving end of the transceiver.

US Patent:

7050831, May 23, 2006

Filed:

Jan 11, 2002

Appl. No.:

10/043902

Inventors:

Zvi H. Meiksin - Pittsburgh PA, US
T. Brad Petrus - Pittsburgh PA, US
Robert J. Kilgore - Pittsburgh PA, US

Assignee:

Transtek, Inc. - Pittsburgh PA

International Classification:

H04B 1/38

US Classification:

455560, 455 40, 455 411, 455203, 4555501

Abstract:

A method and system for communication within an energy-transmission-limited environment. RF transceivers throughout the site are located site-wide such that areas within the site in which communications are desired are within range of at least one of the RF transceivers. At each location RF transceivers are connected to a control unit. The control unit provides power to the transceivers and allows bi-directional communication of audio/voice and/or digital information. The control units may be networked to each other using standard network type category-5 or equivalent cables and may communicate to one another via the network connection. The control units may also be networked via an alternating current powerline by using an alternating current modem. The transceiver of the present invention utilizes single sideband modulators to modulate voice and/or digital signals. The signals are demodulated and filtered at a receiving end of the transceiver.

US Patent:

20020098867, Jul 25, 2002

Filed:

Jan 11, 2002

Appl. No.:

10/043901

Inventors:

Zvi Meiksin - Pittsburgh PA, US
T. Petrus - Pittsburgh PA, US
Robert Kilgore - Pittsburgh PA, US

International Classification:

H04M001/00

US Classification:

455/560000, 455/402000

Abstract:

A method and system for communication within an energy-transmission-limited environment. RF transceivers throughout the site are located site-wide such that areas within the site in which communications are desired are within range of at least one of the RF transceivers. At each location RF transceivers are connected to a control unit. The control unit provides power to the transceivers and allows bi-directional communication of audio/voice and/or digital information. The control units may be networked to each other using standard network type category-5 or equivalent cables and may communicate to one another via the network connection. The control units may also be networked via an alternating current powerline by using an alternating current modem. The transceiver of the present invention utilizes single sideband modulators to modulate voice and/or digital signals. The signals are demodulated and filtered at a receiving end of the transceiver. A comb filter attenuates noisy signals with drifting harmonics.

US Patent:

20080278319, Nov 13, 2008

Filed:

May 3, 2008

Appl. No.:

12/151077

Inventors:

Zvi H. Meiksin - Pittsburgh PA, US
Robert J. Kilgore - Pittsburgh PA, US

International Classification:

G08B 3/00
G08B 21/00
F16B 31/02
G08B 5/00

US Classification:

340540, 3408154, 3403841, 411 9

Abstract:

A detection and alarm system comprises a piezoelectric film sensor and associated circuitry. The sensor detects acoustic emission signals from metallic objects under stress upon which it is affixed. The associated circuitry receives electronic signals from the sensor, creates and evaluates a sensor output value including rate ratio and frequency content of such signals within preset time limits. This data allows the detection of impending failure, an alarm condition, of the metallic object by identifying significant changes in the rate of emission of such sensor signals. An alarm condition may then trigger an alarm signal to warn of such impending failure.

US Patent:

42310113, Oct 28, 1980

Filed:

Sep 24, 1979

Appl. No.:

6/078486

Inventors:

Robert M. DelVecchio - Vandergrift PA
Zvi H. Meiksin - Pittsburgh PA

Assignee:

University of Pittsburgh - Pittsburgh PA

International Classification:

G01L 122

US Classification:

338 2

Abstract:

An improved discontinuous film resistor and strain gauge is disclosed wherein the discontinuous metal film is maintained in a constant humidity in the range of 15% to 45% thereby substantially increasing the life of the strain gauge.

US Patent:

47377585, Apr 12, 1988

Filed:

Sep 27, 1985

Appl. No.:

6/781024

Inventors:

Zvi H. Meiksin - Pittsburgh PA
Melvin K. Fischman - Pittsburgh PA

Assignee:

Parksafe, Inc. - Pittsburgh PA

International Classification:

G08G 114

US Classification:

340 51

Abstract:

The present invention provides an improved electronic parking system which has the capability of providing a relatively inexpensive personal security system to better protect patrons while in the parking garage. The invention provides increased protection through the use of a portable and convenient transmitter carried by a patron which activates a receiver-relay to summon help and activates horns and sirens to frighten away an attacker. The response of the system is immediate and does not depend on visual or auditory interpretation.

US Patent:

42801141, Jul 21, 1981

Filed:

Apr 14, 1980

Appl. No.:

6/140133

Inventors:

Robert M. DelVecchio - Vandergrift PA
Zvi H. Meiksin - Pittsburgh PA

Assignee:

University of Pittsburgh - Pittsburgh PA

International Classification:

G01L 122

US Classification:

338 2

Abstract:

Improved discontinuous and cermet film resistors and strain gauges are disclosed wherein the film is maintained in a constant humidity in the range of 15% to 45% thereby substantially increasing the stable life of the strain gauge.

US Patent:

46528571, Mar 24, 1987

Filed:

Jul 25, 1986

Appl. No.:

6/887987

Inventors:

Zvi H. Meiksin - Pittsburgh PA

International Classification:

H03M 100

US Classification:

340347R

Abstract:

A method and apparatus for transmitting and receiving messages by electromagnetic induction in a power restricted environment is disclosed in which the message bandwidth is narrowed prior to transmission and restored to its original breadth upon reception. This is accomplished by imputting a signal of a given duration into a signal storage means and outputting the signal from the storage means over a longer duration. The signal must be converted into a form suitable for storage. In a first preferred embodiment this is accomplished by converting the message to a digital form inputting it into a signal storage means, retrieving the message from storage at a rate different from the input rate and converting the retrived message to analog form. In a second preferred embodiment the signal is differentiated, and converted into a square wave; the zero crossings are identified and stored. The method and apparatus here disclosed permit transmission of a message with a minimum power input and thus are particularly useful in mines and other power restricted areas.