Electric protective device and process of manufacturing the same

Abstract

An electric protective device capable of handling both short-circuit currents and minor overload currents of impermissible duration. The device for interrupting small overload currents of impermissible duration includes a cylinder, a plunger inside said cylinder, a spring biasing said plunger, heater means, a solder joint conductively connected to said heater means and said plunger, and a body of material evolving gases under the heat of an arc surrounding said solder joint, adjacent portions of said plunger and adjacent portions of said heater means. The process of manufacturing this device is preferably performed in two steps, namely arranging adjacent the solder joint of the device a sleeve-shaped body of melamine and an inorganic filler in a highly viscous putty-like form, and thereafter allowing said body to harden completely.

Dependencies are inferred from the claim text.