1
Fletcher W Chapin, David W Dranchak, David E Engle, Richard R Hall, Thomas G Macek: High density connector. International Business Machines Corporation, Lawrence R Fraley, October 29, 1991: US05061192 (142 worldwide citation)

An electrical connector for interconnecting a pair of circuit members (e.g., circuit module and printed circuit board) which assures highly reliable yet separable connections for these members. The connector includes an electrically insulative (e.g., plastic) frame which defines an internal opening ...


2
Robert H Katyl, Robert M Murcko, David W Dranchak: Fluorescent light ballast with information transmission circuitry. JRS Technology, Salzman & Levy, November 17, 1998: US05838116 (95 worldwide citation)

The present invention features an electronic fluorescent lighting ballast which provides a way to transmit data by modulating the light that is emitted from lamps in a luminaire. The modulation occurs at a sufficiently high frequency, so that it is imperceptible in the range of human vision. Data ca ...


3
Robert H Katyl, Robert M Murcko, David W Dranchak, James R Petrozello: Electronic ballast with embedded network micro-controller. Technical Consumer Products, Salzman & Levy, May 14, 2002: US06388396 (73 worldwide citation)

The present invention features an electronic ballast for use with gas discharge lamps incorporating a microprocessor-based network controller which facilitates the direct attachment of the ballast to a local or building-wide energy management systems. The use of the inventive ballast allows the prod ...


4
Robert H Katyl, Robert M Murcko, David W Dranchak, James R Petrozello: Electronic ballast with embedded network micro-controller. Jrs Technology, Salzman & Levy, January 30, 2001: US06181086 (69 worldwide citation)

The present invention features an electronic ballast for use with gas discharge lamps incorporating a microprocessor-based network controller which facilitates the direct attachment of the ballast to a local or building-wide energy management systems. The use of the inventive ballast allows the prod ...


5
Robert M Murcko, Robert H Katyl, David W Dranchak: Remote dimming control system for a fluorescent ballast utilizing existing building wiring. JRS Technology, Salzman & Levy, April 17, 2001: US06218787 (61 worldwide citation)

A system is described for remotely controlling the dimming level of ballasts for fluorescent lamps through standard two-wire AC power wiring normally used within buildings. The system makes use of a unique dimming control that creates a small positive-negative voltage asymmetry, or DC offset, and en ...


6
Fletcher W Chapin, David W Dranchak, David E Engle, Richard R Hall, Thomas G Macek: High density connector. International Business Machines Corporation, Lawrence R Fraley, November 17, 1992: US05163834 (59 worldwide citation)

An electrical connector for interconnecting a pair of circuit members (e.g., circuit module and printed circuit board) which assures highly reliable yet separable connections for these members. The connector includes an electrically insulative (e.g., plastic) frame which defines an internal opening ...


7
Raymond A Busacco, Fletcher W Chapin, David W Dranchak, Jaynal A Molla, George J Saxenmeyer Jr, Robert D Topa: Method of forming a conductive end portion on a flexible circuit member. International Business Machines Corporation, Lawrence R Fraley, August 24, 1993: US05237743 (52 worldwide citation)

A method of forming conductive end portions on a flexible circuit member having a dielectric layer (e.g., polyimide) with at least one conductive element (e.g., copper) thereon. The method comprises the steps of forming (e.g., punching) an opening through both dielectric and conductive element, prov ...


8
Raymond A Busacco, Chi S Chang, Fletcher W Chapin, David W Dranchak, Thomas G Macek, James R Petrozello, George J Saxenmeyer Jr, Rod A Smith: High density connector. International Business Machines Corporation, Lawrence R Fraley, September 28, 1993: US05248262 (43 worldwide citation)

An electrical connector for interconnecting a pair of circuit members (e.g., a circuit board and module), which, in one embodiment, includes a housing, at least one flexible circuit within the housing and a spring means attached to the flexible circuit at two spaced locations for exerting force agai ...


9
Robert H Katyl, David W Dranchak: Instant start electronic ballast with universal AC input voltage. Technical Consumer Products, Joseph H Taddeo, June 13, 2006: US07061188 (30 worldwide citation)

The present invention relates to an electronic ballast that energizes fluorescent lamps connected in a parallel configuration. The ballast employs a power factor correcting boost converter that can be used over a wide range of AC line voltages to provide regulated power to a self-oscillating sine wa ...


10
Robert H Katyl, Robert M Murcko, David W Dranchak: Inrush protection circuit. JRS Technology, Salzman & Levy, July 27, 1999: US05930130 (28 worldwide citation)

A large inrush of electrical current flow occurs during a short interval after switch closure, when power is applied to a conventional electronic ballast commonly used for fluorescent lighting. This inrush current flows as the main filter capacitor in the ballast charges to its steady state value. F ...