Loading patent…
AssigneeU.S. Philips Corporation
InventorsWolf-Dieter Bauch, Rolf Gervelmeyer, Heinrich B. Merker
Estimating the term…
The electric lamp for series arrangement comprises at least one current-supply wire of nickel wire, copper wire or copper cladded wire. A shortcircuit switch is provided, which consists of a vitreous mass, in which copper powder is dispersed and which is fused with the current-supply wires, and of an oxide skin, which is present on the said current-supply wire at the sealing-in area in the mass. The vitreous mass is electrically conducting. An electrical connection between the current-supply wires is not obtained, however, until the filament burns through and the oxide skin breaks down due to the overvoltage then occurring.
An incandescent lamp, comprising:
Dependencies are inferred from the claim text.