Metal working – Method of mechanical manufacture – Electrical device making
Patent
1987-09-04
1989-04-04
Pellinen, A. D.
Metal working
Method of mechanical manufacture
Electrical device making
29860, 298021, H01H 3900
Patent
active
048172707
ABSTRACT:
The heat coil assembly for a protector unit is formed of a line terminal, an intermediate member and a pin forming a single unit, with a spool mounted on the upper end of the pin and attached by a layer of fusible alloy. A coil on the spool has one end connected to the heat coil assembly and the other end connected to a second line terminal. The coil can be wound on the spool after attaching to the pin to form an assembly for positioning in a base of a protector. A protector may have two such heat coil assemblies, with associated primary gap protectors, and ground member. Back-up protector devices may also be provided, with line members connecting each heat coil assembly to a related back-up protector.
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patent: 3849750 (1974-11-01), Baumbach et al.
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patent: 4396969 (1983-08-01), Fasano
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patent: 4583954 (1986-04-01), Chapman, Jr. et al.
patent: 4594635 (1986-06-01), Scheithauer et al.
Gaffin Jeffrey A.
Northern Telecom Limited
Pellinen A. D.
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