Bernhard Rothkegel is a notable inventor based in Nuremberg, Germany. He has made significant contributions to the field of electrical contact materials, holding a total of 10 patents. His work focuses on improving the production processes and material compositions used in electrical contacts.

Latest Patents

Rothkegel's latest patents include a method for the production of sintered electrical contact material. This innovation involves contact materials based on AgSnO.sub.2, with Bi.sub.2 O.sub.3 and CuO as additional metal oxide additives. The invention specifies that the total content of all metal oxides should be between 10 and 25% by volume, with the SnO.sub.2 share being less than 70% by volume, specifically around 65%, but not lower than 50%. The weight content of SnO.sub.2 is targeted to be in the range of 4% to 8%, and the weight percentage ratio of SnO.sub.2 to CuO is maintained between 8:1 and 12:1. The production process can involve either the purposeful admixture of Bi.sub.2 O.sub.3 powder to an internally oxidized alloy powder or the use of higher bismuth percentages directly in the alloy powder.

Career Highlights

Bernhard Rothkegel is associated with Siemens Aktiengesellschaft, where he applies his expertise in developing advanced electrical contact materials. His innovative approaches have led to the efficient production of two-layer sintered contact elements with a solderable silver layer.

Collaborations

Rothkegel has collaborated with notable coworkers such as Horst Schreiner and Wolfgang Haufe, contributing to the advancement of electrical contact technologies.

Conclusion

Bernhard Rothkegel's work in the field of electrical contact materials showcases his innovative spirit and dedication to improving manufacturing processes. His patents reflect a commitment to enhancing the performance and reliability of electrical components.

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