Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Patent
1978-12-21
1980-10-07
Beha, Jr., William H.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
315185S, 337262, A47G 3316, H01H 8554
Patent
active
042272289
ABSTRACT:
A fuse protects a decorative string set of series-connected miniature incandescent lamps from current overload. The fuse comprises a fuse body insertable into a compartment of a fuse socket wherein electrical contacts are located. A fuse wire which is supported on the body includes a central wire portion mounted in a bore of the body, a pair of intermediate wire portions extending through passageways formed in the body, and a pair of exposed end wire portions bent rearwardly to engage the outer surface of the body. A keying stud and recess are respectively formed on the socket and body to reliably establish an electro-mechanical connection between the exposed end wire portions and the contacts upon insertion of the body into the socket. A fuse plug is inserted into the bore to thereby enclose the central wire portion. All of the fuse parts, exclusive of the wire, are made of fire-resistant and electrically-insulating materials so that the central wire portion is enclosed in an environment resistant to heat and fire. The fuse is easy to manufacture and to assemble, particularly in mass production.
REFERENCES:
patent: 1545781 (1925-07-01), Long
patent: 2831087 (1958-04-01), Sundt
patent: 3968398 (1976-07-01), Lehmann et al.
patent: 4030059 (1977-06-01), Tong
Beha Jr. William H.
Cheng Paul S. Y.
Sadacca Albert V.
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