John W Hassler, Jr

Title: Innovations of John W Hassler, Jr.

Introduction

John W Hassler, Jr. is a notable inventor based in Hollister, CA (US). He has made significant contributions to the field of data storage technology, holding 2 patents that showcase his innovative approaches to disk drive systems.

Latest Patents

Hassler's latest patents include a "Bootstrap method for writing servo tracks on a disk drive." This method involves defining and writing parallel and concentric magnetic signal tracks on a spinning disk surface. It utilizes components of the Head Disk Assembly (HDA) and is implemented by a digital signal central processing unit (CPU) or micro code in an integrated circuit (IC). The process begins with writing an initial magnetic signal track under minimum energy equilibrium conditions, followed by creating a digitized position signal table in memory. This table stores digital position signals that represent the amplitude of signals read from sampling points over multiple disk revolutions. The method allows for achieving track densities in excess of 10,000 tracks per inch.

Another significant patent is the "Self-servowriting disk drive and method." This invention describes a disk drive that includes a rotating disk with a recording surface and a transducer that is swept radially over the surface by a servo-actuator. The system maintains bit-synchronism between tracks by writing clock tracks in a specific sequence, ensuring accurate data retrieval and storage.

Career Highlights

Throughout his career, John W Hassler, Jr. has demonstrated a commitment to advancing technology in the field of data storage. His innovative methods have contributed to the efficiency and reliability of disk drive systems, making a lasting impact on the industry.

Collaborations

Hassler has collaborated with notable colleagues, including Daniel F Cribbs and Michael L Ellenberger, who have contributed to his projects and innovations.

Conclusion

John W Hassler, Jr. is a distinguished inventor whose work in disk drive technology has led to significant advancements in data storage methods. His patents reflect a deep understanding of the complexities involved in magnetic data storage systems.