Ball-locked mechanism for inserting a closure resistor
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United States of America Patent
Stats
-
Sep 4, 2001
Grant Date -
N/A
app pub date -
Nov 29, 1999
filing date -
Nov 30, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mechanism for inserting a closure resistor serves for an electrical switch which contains a semi-moving arcing contact secured to a metal rod connected to the resistor. The mechanism includes a metal tube mounted to slide on the rod and carrying fingers that plug onto a conductive plug of the switch. A switch is disposed between a shoulder provided on the rod and a shoulder provided on the tube so as to be compressed during a first stage of switch opening, and so as to exert a return force on the tube to displace it in the axial direction in order to separate the fingers from the plug during a second stage of switch opening. The mechanism also includes a system having at least one ball which locks the tube so as to prevent it from being displaced in the axial direction during the first opening stage, and which retracts during the second opening stage so as to release the tube so that it can be displaced.
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