Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1980-09-02
1982-09-28
Macon, Robert S.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200148F, H01H 3388
Patent
active
043519938
ABSTRACT:
A movable contact element is coupled by a step-up lever drive with a drive rod. The movable contact element is surrounded by a blast nozzle which moves along with the movable contact element. The blast nozzle is connected to a pump cylinder containing an extinguishing gas. The pump cylinder is guided to be vertically displaceable upon a pump piston and this pump piston is hingedly connected with one end of a first element of a toggle lever which in the cut-on position is in its bent position or mode, the second element of the toggle lever being hingedly connected at a stationary location. The toggle joint of the toggle lever is likewise coupled with the drive rod, so that during a cut-off stroke the toggle lever is extended and then again bent. So that at the start of a cut-off stroke there is initially accelerated the movable contact element and along therewith the blast nozzle as well as the pump cylinder and only thereafter is there compressed the extinguishing gas within the pump cylinder, the lever drive possesses a first coupling element or link which is hingedly connected at one end at the toggle joint and at its other end at the movable contact element as well as a second coupling element or link which is hingedly connected at one end between the ends of the first coupling element at such first coupling element and at its other end at the drive rod, so that at the start of the cut-off stroke the bent position of the toggle lever initially is intensified.
REFERENCES:
patent: 4329553 (1982-05-01), Graf
Kleeman Werner W.
Macon Robert S.
Sprecher & Schuh AG
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