Carl Johan Grubbström

Title: The Innovations of Carl Johan Grubbström

Introduction

Carl Johan Grubbström is a notable inventor based in Saltsjö-Boo, Sweden. He has made significant contributions to the field of electrical engineering, particularly in the development of drive circuits for flash tubes. With a total of 2 patents, his work has had a considerable impact on photographic technology.

Latest Patents

Grubbström's latest patents include a drive circuit for a flash tube and a method for controlling the drive circuit. This invention discloses a drive circuit that comprises a capacitor and a first inductor switch group, which includes a first inductor and at least one first switch connected in series. The first inductor switch group is designed to be connected in series with the flash tube and the capacitor. Additionally, the drive unit features a second inductor switch group that is configured to work in parallel with the first inductor switch group. The method involves receiving input parameters related to desired flash characteristics and controlling the switches based on these parameters to achieve the desired output.

Another significant patent is for a flash tube that provides a flat peak synchronized output. This flash tube is specifically designed for photographic use and includes a length of glass tubing that encloses gas. The cathode inside the glass tubing is equipped with an element that aids in ionizing the gas, allowing for a spark stream to initiate from the upper part of the cathode. This design prevents the spark from spreading downwards, ensuring a consistent arc length during the light output.

Career Highlights

Throughout his career, Grubbström has worked with prominent companies such as Profoto AB and Atlas Copco Industrial Technique AB. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in the field of electrical engineering.

Collaborations

Grubbström has collaborated with notable individuals in his field, including Anton Falk and Ulf Carlsson. These partnerships have likely enriched his work and led to further advancements in his inventions.

Conclusion

Carl Johan Grubbström's contributions to the field of electrical engineering, particularly in the area of flash tube technology, demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to enhancing photographic technology and improving user experience.