Franciscus J Verhallen

Title: Innovations of Franciscus J Verhallen

Introduction

Franciscus J Verhallen is a notable inventor based in Eindhoven, Netherlands. He has made significant contributions to the field of recording devices, particularly focusing on temperature-dependent write-current control. With a total of 2 patents, his work has advanced the technology used in magnetic record carriers.

Latest Patents

One of his latest patents is a recording device that features temperature-dependent write-current control. This device is designed to record an information signal on a magnetic record carrier. It includes a write amplifier, a magnetoresistive magnetic head, and a compensation circuit that adjusts the amplitude of the write current based on temperature variations during recording. The compensation circuit also incorporates an actuator that ensures the record carrier is in contact with the magnetic head before recording begins. Additionally, the device is equipped with detector means to monitor the output signal from the magnetic head, which aids in generating a control signal to manage the write current amplitude effectively.

Another patent by Verhallen also focuses on a recording device with temperature-dependent write current control. This device comprises a recording amplifier, a magnetic head, and a controller that regulates the write current amplitude according to temperature changes. The magnetic head features both a write section for recording and a read section for playback, with the read section being of the magneto-resistive type. The temperature detector is integrated into the read section, enhancing the device's functionality.

Career Highlights

Franciscus J Verhallen has been associated with U.S. Philips Corporation, where he has contributed to various innovative projects. His expertise in recording technology has positioned him as a key figure in the development of advanced recording devices.

Collaborations

Throughout his career, Verhallen has collaborated with notable colleagues such as Rudolf A Van Doorn and Stephanus J Van Beckhoven. These collaborations have further enriched his work and contributed to the success of his inventions.

Conclusion

Franciscus J Verhallen's contributions to the field of recording technology demonstrate his innovative spirit and dedication to advancing the industry. His patents reflect a deep understanding of the complexities involved in recording devices, particularly in managing temperature variations. His work continues to influence the development of more efficient and reliable recording technologies.