Patents by Inventor Alfred Wittwer

Alfred Wittwer 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).

  • Patent number: 4715280
    Abstract: The pole body contains an insulating carrier element made of plastic and provided with elevations on one side and on an other side of the insulating carrier element. The elevation on the other side partially protrudes into a metal layer applied to the insulating carrier element and conjointly therewith forms a planar surface forming the two poles of the fuze. The pole body is manufactured by applying the metal layer to the insulating carrier element which is provided with wedge-shaped elevations. Subsequently, the tips or ridges of the elevations are removed to such an extent that planes including the metal layer are formed. One of the elevations constitutes an interrupted elevation and a number of detonating bridges is formed, depending on the number of interruptions in the elevation between the ends of the elevation bounded by the interruptions thereof. The pole body is used in electric fuze devices which have a reaction time in the microsecond range and thus are suited for use with ammunition.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: December 29, 1987
    Assignee: EMS-Inventa AG
    Inventor: Alfred Wittwer
  • Patent number: 4686903
    Abstract: The pole body for electric fuses comprises a homogeneous insulator in which a needle-shaped detonator pin is arranged normally to the plane of a metal layer which contacts a detonator charge on its opposite side. Due to the nearly point-shaped detonating bridge formed in the metal layer there occur, at the moment of detonation, very high current densities which cause melting of the detonating bridge. The pole body is manufactured from a glass tube surrounded by a metal tube. In order to prevent occlusion of gas in the insulator formed from the glass tube, a guiding body is placed upon the tip of the detonator pin which is part of a pole pin or of a pole cup during the melting operation. Preferably, the pole body is used in fuses with extremely short reaction times, for example, in ammunition, projectiles and the like.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: August 18, 1987
    Assignee: Ems-Inventia AG
    Inventor: Alfred Wittwer