Patents by Inventor Hans Dethlefsen

Hans Dethlefsen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Switching arrangement for the production of sequential current pulses
    Patent number: 3953804
    Abstract: The invention relates to a switching arrangement for the production of sequential current pulses such as for the control of flashing systems wherein the firing order can be achieved electronically. The invention further provides for a switching arrangement for sequential firing of blasting charges. Specific marginal conditions such as the maintenance of a minimum time interval between two successive explosions, due to the ratios of pressure waves, are given in the preferred embodiment.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: April 27, 1976
    Assignee: Siemens Atkiengesellschaft
    Inventors: Hans Dethlefsen, Alfred Hauenstein, Karl-Heinz Vogl