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US 4,687,891 AGranted
Fast manual closing mechanism of a miniature circuit breaker
AssigneeMerlin Gerin
InventorsWilliam Bartolo, Patrick De Robertis, Daniel Vanzetto
Life of this patent
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Abstract
The invention relates to a fast closing mechanism of a circuit breaker with an operating handle. The mechanism comprises an energy storage spring disposed between the handle and an intermediate lever supporting a transmission rod. A retaining plate operates in conjunction with a pin of the handle to occupy either an active position locking the rod during loading of the spring, or a retracted position unlocking the rod allowing the spring to be released at the end of closing travel.
Claims6
A fast manual closing mechanism of a moulded insulating casing electrical circuit-breaker, comprising:
- a manual opening and closing operating handle having a body coupled by a kinematic linkage system to a contact arm, and being mounted pivotally on a spindle;
- an energy storage spring anchored between said handle and an intermediate operating lever;
- a transmission rod articulated on said operating lever so as to form a dead center toggle joint coupled with said kinematic linkage system;
- a retaining plate able to occupy either an active position for locking the transmission rod during loading of the energy storage spring, or a retracted position for unlocking the rod to free said toggle joint and allow the energy storage spring to be released;
- and
- an unlocking pin fixed to the body of the handle in such a way as to move the retaining plate from the active position to the retractred position, when the handle reaches a predetermined point of its trajectory situated at the end of closing travel, said pin and plate forming a blocking device suitable to lock the kinematic linkage system during loading of said energy storage spring, and to free said system to bring about fast closing of the contacts of the circuit-breaker.
3 more elements
Dependencies are inferred from the claim text.