1
Joseph A Eccher: Fluoresent lamp current level controller. Hewlett Packard Company, November 22, 1994: US05367223 (28 worldwide citation)

A method and apparatus for automatically adjusting the light intensity output of a fluorescent lamp of a document scanner. The fluorescent lamp current level control apparatus comprises preheating circuitry for applying low voltage pulses of alternating polarity across filaments of the lamp, the low ...


2
Joseph A Eccher, Michael J Steinle: Feedback control system using optical incremental position encoder with dual sinusoidal intensity patterns. Hewlett Packard Company, Augustus W Winfield, May 15, 2001: US06232594 (11 worldwide citation)

A feedback control system has two sinusoidal quadrature position feedback signals generated by photosensitive detectors that sense light reflected from (or transmitted through) position encoding strips that have a reflectance (or transmissivity) that varies sinusoidally along the length of the strip ...


3
Jay G Sherritt, Joseph A Eccher: Audio indicating system. Ball Brothers Research Corporation, O Rourke Harris & Hill, March 22, 1977: US04014016 (7 worldwide citation)

A sightless indicating system and method is disclosed that is useful as an indicating device for diverse equipment, including equipment such as an electronic calculator, and is particularly useful by a blind person. When utilized as a part of an electronic calculator, a standard calculator keyboard ...


4
Thomas W Holmquist, Joseph A Eccher, Nicholas D Thayer: Method and system for sensing the proper insertion of a portable memory element. Hewlett Packard Development Company, David M Mason, April 22, 2003: US06553444 (2 worldwide citation)

The present invention provides a device for sensing when a portable memory element (“PME”) has been properly inserted and secured within a receiving port. The present invention achieves the objective by recognizing a change in an inductive current once a locking device properly secures the PME withi ...


5
Thomas W Holmquist, Ron L King, Joseph A Eccher: Motor driver fault protector. Hewlett Packard Development Company, June 17, 2003: US06580590 (2 worldwide citation)

A motor driver high current protector includes a voltage source, a current sensor, a comparator, a switch, a delay circuit, and an inhibitor. The current sensor is configured to sense current passing through the motor driver and output a voltage responsive to the sensed current. The comparator has a ...


6
Joseph A Eccher, Thomas Michael Love: Systems and methods for switched mode power amplification. Goodrich Corporation, Snell & Wilmer L, June 4, 2013: US08456146

Systems and methods for switched mode power amplification are disclosed herein. A circuit is provided comprising an amplifier network, a DC translation stage for receiving input voltage from the amplifier network and for providing an output voltage to a voltage boost circuit, and a feedback network ...


7
Thomas W Holmquist, Ron L King, Joseph A Eccher: Motor driver fault protector. Hewlett Packard Company, July 4, 2002: US20020085324-A1

A motor driver high current protector includes a voltage source, a current sensor, a comparator, a switch, a delay circuit, and an inhibitor. The current sensor is configured to sense current passing through the motor driver and output a voltage responsive to the sensed current. The comparator has a ...