Company Filing History:
3 out of 47 
2 out of 26 
1 out of 8,679 
Years Active: 1993-1999
Title: The Innovations of Thomas L. Andrews
Introduction
Thomas L. Andrews is a notable inventor based in Ward, Colorado, with a remarkable portfolio of seven patents. His work primarily focuses on advancements in disk drive technology, showcasing his expertise in adaptive servo systems and power conservation mechanisms.
Latest Patents
One of Andrews' latest patents is the "Multi-harmonic compensator for track following in disk drives." This invention involves an adaptive servo system that compensates for a track being off center or distorted. It analyzes the spectral content of the radial variation of the centerline of a track relative to a rotation axis. The system generates multiple component signals that are harmonics of the rotation frequency and combines these signals into a positioning signal for an actuator. The analysis of the spectral content can be achieved through a discrete Fourier transform of a position error signal, which helps in generating a correction signal that cancels out previously determined components of the position error signal. This innovative system converges to produce a periodic signal that compensates for multiple harmonics in the radial variation of the track's position.
Another significant patent is the "Disk drive apparatus with power conservation capability." This invention is designed for use with portable and laptop information storage systems. The disk drive apparatus includes one or more 2.5-inch hard disks and features electronics that detect the lapse of predetermined time intervals since the last disk access. The apparatus incorporates power conservation means that power down specific components of the disk drive after certain time intervals have elapsed, enhancing energy efficiency.
Career Highlights
Throughout his career, Thomas L. Andrews has worked with several companies, including Integral Peripherals, Inc. and Mobile Storage Technology, Inc. His contributions to these organizations have significantly impacted the development of disk drive technologies.
Collaborations
Andrews has collaborated with notable coworkers such as Gary E. Counts and James H. Morehouse, further enriching his professional experience and contributions to the field.
Conclusion
Thomas L. Andrews is a distinguished inventor whose innovative patents have advanced disk drive technology. His work continues to influence the industry, showcasing the importance of innovation in technology.
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