The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1986
Filed:
Jun. 28, 1984
Gerhard Peche, Romrod, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
Cup-shaped switch contact member for an electric vacuum switch having a lead post, a bottom connected to the lead post, a cylinder wall connected to the bottom, and a contact ring secured to the cylinder wall and formed of a material favoring interruption of an arc and having a lower conductivity than that of the cylinder wall, the lead post having a diameter smaller than the inner diameter of the cylinder wall, the cylinder wall and the contact ring being at least partly slotted, the slots formed in the cylinder wall extending at an angle to the axis of rotation of the switch contact member and merging with the slots formed in the contact ring, including a contact surface formed on the contact ring and having a pair of concentric annular zones overlying respective radially inner and radially outer marginal regions of an annular end face of the cylinder wall, the contact surface also having a middle annular zone disposed between the concentric annular zones and being farther removed from the cylinder wall than either of the concentric annular zones, a layer of the material of the contact ring having a thickness approximately equal to a depth of maximum melting occuring during switch-off or disconnection of the switch contact member, the layer being disposed in vicinity of the slots formed in the contact ring and extending continuously along the contact surface without being slotted, the contact ring being of such thickness as to be able to absorb maximum bending forces occurring during closing or switch-on of the switch contact member without impermissible deformation.