CHRISTOPHER MARK ROGAN
Engineers in State College, PA
License number
Pennsylvania PE070661
Category
Engineers
Type
Professional Engineer
Address
Address
State College, PA 16801
Professional information
Intellingent Three-Way And Four-Way Dimmers
US Patent:
2007000, Jan 11, 2007
Filed:
Jun 6, 2006
Appl. No.:
11/447496
Inventors:
Donald Mosebrook - Coopersburg PA, US
Christopher Rogan - State College PA, US
Jamie Steffie - Slatington PA, US
Jon Keagy - Perkasie PA, US
Steven Detmer - Hellertown PA, US
Christopher Rogan - State College PA, US
Jamie Steffie - Slatington PA, US
Jon Keagy - Perkasie PA, US
Steven Detmer - Hellertown PA, US
International Classification:
H01H 33/59
US Classification:
307139000
Abstract:
A smart dimmer switch for control of a lighting load from an AC voltage source can replace any switch in a three-way or four-way lighting control system. The smart dimmer switch can be connected on the line-side or the load-side of a three-way system with a standard three-way switch in the other location. Further, the dimmer switch can replace a four-way switch in a four-way system and is operable to be coupled to two standard three-way switches. The dimmer switch includes either one or two semiconductor switches to control the intensity of the connected lighting load. The dimmer switch preferably includes a sensing circuit for detecting an electrical characteristic (i.e., either a voltage or a current) at a terminal of the dimmer to determine the state of the connected three-way switch(s) or four-way switch. The dimmer switch preferably controls the state of the semiconductor switch in response to either a toggle of any of the other switches in the system or an actuation of a toggle button of the dimmer switch.
Lighting Control Device For Use With Lighting Circuits Having Three-Way Switches
US Patent:
8212425, Jul 3, 2012
Filed:
Feb 9, 2010
Appl. No.:
12/702550
Inventors:
Donald Mosebrook - Coopersburg PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Jon M. Keagy - Perkasie PA, US
Steven E. Detmer - Hellertown PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Jon M. Keagy - Perkasie PA, US
Steven E. Detmer - Hellertown PA, US
Assignee:
Lutron Electronics Co., Inc. - Coopersburg PA
International Classification:
H01H 3/00
US Classification:
307139
Abstract:
A dimmer switch coupleable to a circuit including a power source, load, and single-pole double-throw three-way switch that comprises a first and a second fixed contact and a movable contact. The three-way switch has a first state and a second state. The dimmer switch comprises first, second and third load terminals coupled in series with the three-way switch. The dimmer switch comprises a controllably conductive device. A sensing device is coupled to the third load terminal such that when the three-way switch is in the second state, the sensing device is operable to sense an electrical characteristic associated with the third load terminal. A controller is coupled to the controllably conductive device and to the sensing device for rendering the controllably conductive device conductive in response to the sensed electrical characteristic and so that power is delivered through the second load terminal of the third load terminal depending on the state of the three-way switch.
Dimmer Switch For Use With Lighting Circuits Having Three-Way Switches
US Patent:
8212424, Jul 3, 2012
Filed:
Feb 9, 2010
Appl. No.:
12/702503
Inventors:
Donald Mosebrook - Coopersburg PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Jon M. Keagy - Perkasie PA, US
Steven E. Detmer - Hellertown PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Jon M. Keagy - Perkasie PA, US
Steven E. Detmer - Hellertown PA, US
Assignee:
Lutron Electronics Co., Inc. - Coopersburg PA
International Classification:
H01H 3/00
US Classification:
307139
Abstract:
A dimmer switch coupleable to a circuit including a power source, load, and single-pole double-throw three-way switch that comprises a first and a second fixed contact, and a movable contact. The three-way switch has a first state in which the movable contact is contacting the first fixed contact and a second state in which the movable contact is contacting the second fixed contact. The dimmer switch comprises first, second and third load terminals coupled in series with the three-way switch. The dimmer switch comprises first and second controllably conductive devices, such that the first and second controllably conductive devices are operable to conduct load current to control the amount of power delivered to the load when the three-way switch is in the respective first and second states; and a controller coupleable to the first and second controllably conductive devices for rendering the first and second controllably conductive devices conductive and non-conductive.
Load Control Device For Use With Lighting Circuits Having Three-Way Switches
US Patent:
7847440, Dec 7, 2010
Filed:
Aug 9, 2007
Appl. No.:
11/836535
Inventors:
Donald Mosebrook - Coopersburg PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Matthew Robert Blakeley - Allentown PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Matthew Robert Blakeley - Allentown PA, US
Assignee:
Lutron Electronics Co., Inc. - Coopersburg PA
International Classification:
H01H 9/54, H01H 33/59
US Classification:
307139, 307115
Abstract:
A smart dimmer for control of a lighting load from an AC power source can replace any switch in a three-way or four-way lighting control system. The smart dimmer can be connected on the line-side or the load-side of a three-way system with a standard three-way switch in the other location. According to one embodiment of the present invention, the dimmer includes two triacs to control the intensity of the connected lighting load. The dimmer preferably includes two gate drive circuits coupled to the gates of the triacs for rendering the triacs conductive each half-cycle of the AC power source. The gate drive circuits include sensing circuits for detect whether the gates currents are flowing after the triacs are rendered conductive. A controller is operable to determine the state of the lighting load in response to whether the gate current is flowing or not flowing.
Load Control Device For Use With Lighting Circuits Having Three-Way Switches
US Patent:
7772724, Aug 10, 2010
Filed:
Jun 22, 2007
Appl. No.:
11/767279
Inventors:
Donald Mosebrook - Coopersburg PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Matthew Robert Blakeley - Allentown PA, US
Christopher M. Rogan - State College PA, US
Jamie J. Steffie - Slatington PA, US
Matthew Robert Blakeley - Allentown PA, US
Assignee:
Lutron Electronics Co., Inc. - Coopersburg PA
International Classification:
H01H 9/54, H01H 33/59
US Classification:
307139, 307115
Abstract:
A smart switch for control of a lighting load from an AC voltage source can replace any switch in a three-way lighting control system. The smart switch can be connected on the line-side or the load-side of a three-way system with a standard three-way switch in the other location. The switch includes two semiconductor switches to control the connected lighting load. The switch preferably includes two sensing circuits for detecting the voltages at two of the load terminals of the switch to determine the state of the connected three-way switch(s), and thus, the load.
Hybrid Power And Energy For Robots
US Patent:
2013002, Jan 24, 2013
Filed:
Jul 20, 2012
Appl. No.:
13/554148
Inventors:
Karl Martin Reichard - State College PA, US
Christopher Mark Rogan - State College PA, US
Elisha M. Hughes - State College PA, US
Nathaniel John Hobbs - State College PA, US
Heath Fred Hofmann - Ann Arbor MI, US
Christopher Mark Rogan - State College PA, US
Elisha M. Hughes - State College PA, US
Nathaniel John Hobbs - State College PA, US
Heath Fred Hofmann - Ann Arbor MI, US
Assignee:
The Penn State Research Foundation - University Park PA
International Classification:
B60L 1/00
US Classification:
307 91
Abstract:
Advances in robot performance have been limited by a lack of advances in the mature field of battery technology. The focus of robotic power systems must expand from the use of single energy devices to the inclusion of multiple devices which can be optimized for a robotic platform. The challenge lies in the development of the hardware and control algorithms for a scalable power delivery architecture which satisfies the power and energy requirements of most unmanned ground vehicles. This invention is directed to an architecture which is easily scalable and facilitates the use of a wide variety of energy storage/generation devices, while focusing on the system control algorithm and its stability. The experimental results for an example system are presented demonstrating that the architecture functions properly when faced with real world robotic power demands.