Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1983-05-06
1985-04-30
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148R, 200148B, 337 4, 337 9, H01H 3312
Patent
active
045146063
ABSTRACT:
A disconnect switch is disclosed having a puffer interrupter electrically connected with and operated by a knife switch or fused disconnect switch. A puffer interrupter includes a divided pressure chamber having at least one exterior wall which is flexible and responsive to the pressure therein. A fixed tubular electrical contact is carried by a fixed interior wall within the puffer interrupter housing so as to establish flow communication through the fixed interior wall. A floating electrical contact is carried by the flexible wall and is adapted to engage and disengage from the fixed electrical contact in response to movement of the flexible wall. A snap spring biases the floating contact away from the fixed contact during arc interruption. The knife switch carries a camming member which electrically connects the knife switch to the floating contact and which overcomes the snap spring in such a manner that the knife switch is electrically disconnected from the load before the puffer interrupter is discharged and is electrically connected to the load after the puffer interrupter is closed. Several embodiments of the abutting ends of the fixed and floating contacts and pressure chamber walls are illustrated.
REFERENCES:
patent: 2172225 (1939-09-01), Schofield et al.
patent: 2200122 (1940-05-01), Rawlins
patent: 2469203 (1949-05-01), Palme et al.
patent: 2480622 (1949-08-01), Warnock
patent: 2769063 (1956-10-01), Lingal
patent: 4123637 (1978-10-01), Lott et al.
Gabala James A.
Gealow Jon Carl
Gilroy Hugh M.
Macon Robert S.
McGraw-Edison Company
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