(under subclass 217) Subject matter including means whereby the fuse link is expelled under the influence of gaseous pressure generated upon rupture of the element or by explosive or expansible material heated by current traversing the fuse.
(1) Note. For devices utilizing deionizing gas or vapor generating material for the purpose of blowing out an arc and in which expulsion of the fuse link occurs in the process of or incidental to the blowing out of the arc, search subclasses 273+ particularly indented subclass 281.
SEE OR SEARCH CLASS
218, High-Voltage Switches With Arc Preventing and Extinguishing Devices,
43+, for arc extinguishing means utilizing an air current and in which fuse extraction may accompany the blow out function.
