Cam operated spring discharge interlock mechanism

Details Cam operated spring discharge interlock mechanism Cam operated spring discharge interlock mechanism

2011-06-21

2011-06-21

Luebke, Renee (Department: 2833)

Electricity: circuit makers and breakers

Interlocking

Drawout-type switchgear

C200S050240, C361S609000

Reexamination Certificate

active

07964809

ABSTRACT:
Disclosed herein is a method of moving and altering movement of a breaker mounted spring discharge interlock lever during racking and unracking of a breaker with an enclosure. The method includes, rotating a racking screw to rack the breaker into or out of the enclosure, rotating a shaft in operable communication with the racking screw, translationally moving a cam with a link having one end disconnectably connected to the cam and an opposing end disconnectably connected to a crank, that is fixedly attached to the shaft, translationally moving a cam follower that is in operable communication with the cam, moving the breaker mounted spring discharge interlock lever that is in operable communication with the cam follower, and enabling removal and replacement of the cam by disconnecting the cam from the link, thereby enabling the movement of the breaker mounted spring discharge interlock lever to be altered.

REFERENCES:
patent: 2412954 (1946-12-01), Zdancewicz
patent: 2614579 (1952-10-01), Crockett
patent: 3778567 (1973-12-01), Davies
patent: 5036427 (1991-07-01), Krom et al.
patent: 6031192 (2000-02-01), Liebetruth
patent: 6160229 (2000-12-01), Grelier et al.
patent: 6184483 (2001-02-01), Coudert et al.
patent: 7821775 (2010-10-01), Narayanasamy et al.
Narayanasamy, Soundararajan et al. “A Spring Discharge Mechanism for Circuit Breaker,” U.S. Appl. No. 12/103,075, filed Apr. 15, 2008. Specification having 17 pages, Figures having 8 Sheets.

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