Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1992-09-22
1993-07-13
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
361 41, H01H 8502, H01H 8514
Patent
active
052277585
ABSTRACT:
A tubular fuseholder housing carries two sets of generally-stationary contacts located at points spaced apart along the length of the housing. Within the housing is a fuse comprising a cartridge and, at opposite ends of the cartridge, terminal contacts for respectively engaging the stationary contacts when the cartridge is fully inserted into the housing. An insulating operating rod within the fuseholder housing is coupled to the fuse cartridge and extends toward the outer end of the housing.
Actuation of the operating rod separates the terminal contacts from the generally-stationary contacts and draws electric arcs between these contact. Closely adjacent the individual contacts of each set of stationary contacts and angularly aligned with the individual contacts, supplemental exhaust ports are provided in the fuseholder housing. The fuseholder housing normally contains dielectric liquid covering the fuse which is vaporizable by the arcs to generate gases that are exhausted through the supplemental ports. Actuation of the fuse cartridge from its fully-inserted position toward its disconnected position produces a pumping action within the fuseholder housing that forces liquid within the housing through the regions of said arcs and out the supplemental ports.
REFERENCES:
patent: 4625196 (1986-11-01), Muench et al.
Brochure of General Electric Co., Hickory, N.C., entitled "Bayonet Fuseholder", Publication No. PEP80.12, dated Dec. 1980 (8 pages).
Publication of RTE Corp., 1900 E. North St., Waukesha, WI 53186, entitled RTE EL Bay-O-Net Current Limiting Fuse Holder, Section 640; undated but published prior to 1989 (2 pages).
Broome Harold
Freedman William
General Electric Company
Policinski Henry J.
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