Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1990-03-09
1991-12-10
Scott, J. R.
Electricity: circuit makers and breakers
Liquid contact
Time delay
335 16, 335195, H01H 3302
Patent
active
050720821
ABSTRACT:
A high voltage ground blade assembly which has a folding member to aid in breaking ice and lowering the force to operate the blade assembly in combination with an electric coil which creates an electromagnetic force to prevent the folding member from moving when the blade assembly is in closed position and the blade assembly is conducting very high short-circuit current.
REFERENCES:
patent: 2959654 (1960-11-01), Caswell et al.
patent: 3238339 (1966-03-01), Fehling
patent: 4379956 (1983-04-01), Cleaveland et al.
patent: 4849590 (1989-07-01), Becker et al.
Cleaveland /Price Inc.
Palmer W. D.
Scott J. R.
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