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Leonard W Jenski

from Roselle, IL
Age ~68
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Also known as:
Kathryn Jenski
Phone and address:
353 Brighton Bay, Keeneyville, IL 60172
(630) 529-7915
Related to:
Jack G Rowe, 100Kristin Depasquale, 50Araceli Cortes, 48Araceli Cortes, 28Giovanni PalmeriniMarjorie Rowe
Connected to:
Jay C Jensky, 58Morgan R Jensma, 28Alicia A Jenson, 55Ann E Jenson, 86April A Jenson, 45Aziele S Jenson, 75Bob B Jenson, 99Cathy A Jenson, 72Cody W Jenson, 33Connie R Jenson, 70

Leonard Jenski Phones & Addresses

  • 353 Brighton Bay, Roselle, IL 60172 (630) 529-7915
  • Itasca, IL
  • 234 Nantucket Hbr, Schaumburg, IL 60193
  • 353 Brighton Bay, Roselle, IL 60172

Work

Company: Robertshaw Jul 1981 to Jan 2016 Position: Hardware engineering manager

Skills

Hardware Engineering • Manufacturing

Industries

Electrical/Electronic Manufacturing

Resumes

Resumes

Leonard Jenski Photo 1

Leonard Jenski

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Location:
353 Brighton Bay, Roselle, IL 60172
Industry:
Electrical/Electronic Manufacturing
Work:
Robertshaw Jul 1981 - Jan 2016
Hardware Engineering Manager
Skills:
Hardware Engineering
Manufacturing

Publications

Us Patents

Adaptive Defrost Control Circuit With Relay Power Saving Feature

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US Patent:
7587906, Sep 15, 2009
Filed:
Mar 9, 2006
Appl. No.:
11/371482
Inventors:
Bay Estes - Palatine IL, US
Leonard W. Jenski - Roselle IL, US
Assignee:
Robertshaw Controls Company - Carol Stream IL
International Classification:
F25D 21/06
F25D 21/00
US Classification:
62151, 62 80, 62155
Abstract:
A defrost heater relay control circuit having reduced power consumption during a de-energized mode of operation is provided. The relay drive circuit utilizes a series connected capacitor to introduce a phase shift in the AC current waveform such that the amount of real power dissipated in the circuit during periods when the defrost heater control relay is de-energized is greatly reduced. This effectively shorts out the relay drive voltage without generating heat due to real power dissipation through the switched circuitry that disables the relay.

Damper Door Control From Adaptive Defrost Control

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US Patent:
20060218950, Oct 5, 2006
Filed:
Mar 23, 2006
Appl. No.:
11/388035
Inventors:
Leonard Jenski - Roselle IL, US
Robert Alvord - Elmwood Park IL, US
Gary Ashurst - Aurora IL, US
Thomas Donahue - Lombard IL, US
Assignee:
Robertshaw Controls Company - Richmond VA
International Classification:
F25D 17/04
US Classification:
062186000, 062187000, 062408000
Abstract:
An adaptive defrost control method and device for controlling a damper door during a defrost cycle is provided. Before entering the defrost cycle, the adaptive defrost control logic determines if the damper door is open. If the damper door is open, the defrost cycle is suspended until the door is closed. If the damper door is closed, the adaptive defrost control logic activates a barrier between the damper door motor and a power supply so that the damper door may not be opened during the defrost cycle. After the defrost cycle is completed, the adaptive defrost control logic removes the barrier between the damper door motor and a power supply. The damper door may then be opened and closed as necessary. Accordingly, warm moist air from the defrost cycle does not enter the fresh food compartment.

System And Method For Determining Defrost Power Delivered By A Defrost Heater

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US Patent:
20070234748, Oct 11, 2007
Filed:
Apr 6, 2006
Appl. No.:
11/399157
Inventors:
Robert Alvord - Elmwood Park IL, US
Leonard Jenski - Roselle IL, US
Benjamin Lease - Knoxville TN, US
Assignee:
Robertshaw Controls Company - Richmond VA
International Classification:
F25D 21/00
F25D 21/06
US Classification:
062150000, 062275000
Abstract:
An adaptive defrost control system of the present invention monitors an amount of current flowing through the defrost heater to calculate the amount of power delivered thereby. The circuit utilizes a thermistor to monitor the temperature rise of the electrical trace supplying current to the defrost heater to allow the controller to calculate an amount of power delivered thereby. A second thermistor may be used to compensate for a change in ambient temperature that might otherwise be attributed to a change in current flow through the power trace. A physical modification to the power trace to enhance the temperature rise characteristic at the point of placement of the thermistor enhances the accuracy of the calculation. A secondary current flow path around the branch of thermistor placement is also provided so as to not reduce the total current carrying capacity of the power trace.

System And Method For Detecting Miswiring Of An Electrical Appliance

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US Patent:
20120191399, Jul 26, 2012
Filed:
Jan 20, 2011
Appl. No.:
13/010332
Inventors:
Leonard W. Jenski - Roselle IL, US
Raymond Bambule - Naperville IL, US
Daniel Zuzuly - Geneva IL, US
Guy Mereness - Sycamore IL, US
Assignee:
ROBERTSHAW CONTROLS COMPANY - Carol Stream IL
International Classification:
G01R 31/02
US Classification:
702117
Abstract:
A system for detecting the miswiring of an electrical appliance that includes a microprocessor having first and second input connections to sample signals on two different electrical power lines. The microprocessor further includes a third input connection for a neutral line. In an embodiment of the invention, there is at least one switch through which electrical power can flow into a load. The at least one switch is controlled by the microprocessor. In a particular embodiment, the microprocessor is configured to compare the signals sampled at the first and second input connections to determine whether the electrical appliance has been wired correctly.

Driver Circuitry For Latching Type Valve And The Like

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US Patent:
62626205, Jul 17, 2001
Filed:
Nov 2, 1999
Appl. No.:
9/431820
Inventors:
Leonard W. Jenski - Roselle IL
Kevin G. Nowobilski - Orland Hills IL
Bay E. Estes - Palatine IL
Assignee:
Ranco Incorporated of Delaware - Wilmington DE
International Classification:
H03K 1756
US Classification:
327424
Abstract:
A driver circuit for a latching type valve is provided which utilizes an electronic switch assembly to provide the dual polarity necessary to actuate the latching type valve to both its open and closed states. The driver circuitry includes a microprocessor and a slope detector circuit for monitoring the coil current used to energize the valve solenoid to determine when the valve armature has moved to its fully actuated position. The driver circuit preferably utilizes power MOSFET devices in the switch assembly configured into an H-bridge to drive the solenoid coil. Advantageously, the user of power MOSFET devices eliminates the necessity for a current sense resistor in the control circuitry, thereby decreasing power dissipation and increasing efficiency of the drive circuit, thereby prolonging the battery life used to drive the valve. A pulse of fixed duration may be utilized to transition the valve to an OFF position, or a second slope detector may be implemented to control the transition to the OFF position in like manner. Monitoring of the actual time required to actuate the valve may be utilized to signal low battery voltage or a failed valve, if desired.

Zero Cross Relay Actuation Method And System Implementing Same

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US Patent:
62331329, May 15, 2001
Filed:
Sep 1, 1999
Appl. No.:
9/388042
Inventors:
Leonard Jenski - Roselle IL
Assignee:
Ranco Incorporated of Delaware - Wilmington DE
International Classification:
H01H 900
US Classification:
361160
Abstract:
An electromechanical relay drive system which prolongs relay life by ensuring operation of the relay in a manner to make and break contact between the contact electrodes at a zero crossing point of the switched waveform. Relay aging and environmental variations are dynamically compensated upon each actuation of the electromechanical relay to ensure proper timing of the energization and de-energization of the relay to ensure switching at the zero crossing point. Additionally, the drive system described compensates for variations in the actual contact operation during actuation for the positive and negative half cycle of the switched waveform. Furthermore, the system of the instant invention alternately energizes and de-energizes the electromechanical relay during the positive and negative half cycles of the switched waveform to prevent metal deposition from one contact electrode to the other. This system calculates the appropriate delays on a dynamic historical perspective by sensing slope changes of the coil voltage and current.

Self-Test Routine And Circuit For Led Display

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US Patent:
60284412, Feb 22, 2000
Filed:
Aug 14, 1997
Appl. No.:
8/911331
Inventors:
Robert J. Alvord - Elmwood Park IL
Leonard W. Jenski - Roselle IL
International Classification:
G01R 3100
US Classification:
324767
Abstract:
A method and apparatus for operating and executing a self-test routine of an LED display device adapted for assembly into home appliance. The device is comprised of a plurality of LED elements, a control processor, a switch assembly, and a signaling element. The self-test routine comprises disposing the switch assembly in a predetermined pattern for detecting switch operability and initiating a program in the processor for self-testing of illumination of the LED elements. The elements are monitored during the self-test routine for communicating a minimum current level preselected as identifying proper illumination. Failure of the self-test routine to properly detect minimum current levels precludes a proper response from the signaling element within a predetermined time limit, thereby causing the display device to be identified as an unacceptable device.

Self-Test Routine For Led Display

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US Patent:
60878460, Jul 11, 2000
Filed:
May 18, 1999
Appl. No.:
9/314043
Inventors:
Robert J. Alvord - Elmwood Park IL
Leonard W. Jenski - Roselle IL
Assignee:
Ranco Incorporated of Delware - Wilmington DE
International Classification:
G01R 3100
G01R 3126
US Classification:
324767
Abstract:
A method and apparatus for operating and executing a self-test routine of an LED display device adapted for assembly into home appliance. The device is comprised of a plurality of LED elements, a control processor, a switch assembly, and a signaling element. The self-test routine comprises disposing the switch assembly in a predetermined pattern for detecting switch operability and initiating a program in the processor for self-testing of illumination of the LED elements. The elements are monitored during the self-test routine for communicating a minimum current level preselected as identifying proper illumination. Failure of the self-test routine to properly detect minimum current levels precludes a proper response from the signaling element within a predetermined time limit, thereby causing the display device to be identified as an unacceptable device.
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Leonard W Jenski from Roselle, IL, age ~68 Get Report