Circuit breaker having an improved linkage

Claim 1

IN A CIRCUIT BREAKER THE COMBINATION COMPRISING STATIONARY AND MOVABLE CONTACTS, A FRAME PLATE, A CASE, A STATIONARY ARM CARRYING SAID STATIONARY CONTACT AND MOUNTED TO SAID CASE; A FOUR BAR LINKAGE COMPRISING A HANDLE LINK, A CATCH LINK, A CONNECTING LINK AND A FOURTH LINK; THE HANDLE LINK, THE CATCH LINK, THE CONNECTING LINK AND THE FOURTH LINK BEING PIVOTALLY CONNECTED TO DEFINE A FOUR-BAR LINKAGE; A CRADLE RESTRAINING MOVEMENT OF SAID CATCH LINK WHEN THE CIRCUIT BREAKER IS IN THE CONTACTS CLOSED POSITION, A HANDLE CONNECTED TO SAID HANDLE LINK, SAID STATIONARY CONTACT BEING ENGAGEABLE BY SAID MOVABLE CONTACT, A FIFTH LINK FORMING WITH SAID FOURTH LINK A TOGGLE, SAID FRAME PLATE BEING SECURED TO SAID CASE, A PINTLE TO WHICH ARE PIVOTALLY CONNECTED SAID HANDLE AND SAID CATCH LINK, SAID CATCH LINK AND SAID HANDLE LINK BEING PIVOTAL ON SAID PINTLE, A LOCK YIELDINGLY CARRIED BY SAID CRADLE AND ENGAGEABLE WITH SAID CATCH LINK, A SPRING BIASING SAID LOCK AND SAID CRADLE TOWARD A POSITION IN WHICH SAID LOCK IS ENGAGEABLE BY SAID CATCH LINK, MOVABLE ARM TO WHICH IS SECURED THE MOVABLE CONTACT, SAID MOVABLE ARM BEING CONNECTED TO SAID FIFTH LINK AND CONTROLLED THEREBY, AN ELECTROMAGNETIC MEANS TO RELEASE SAID CRADLE FROM SAID CATCH LINK, STOP MEANS LIMITING OVERTRAVEL MOVEMENT OF SAID TOGGLE WHEN THE CONTACTS ARE CLOSED, AND AN OPENING SPRING MEANS HAVING A PORTION MOUNTED TO SAID FRAME PLATE, SAID SPRING MEANS ENGAGING AND BIASING SAID MOVABLE CONTACT ARM TO THE CONTACTS OPEN POSITION, SAID LINKS BEING PROPORTIONED RELATIVE TO EACH OTHER TO PERMIT SAID TOGGLE TO ACT AS A RIGID STRUT TO TRANSFER THE OPENING SPRING PRESSURE TO SAID CATCH LINK AS THE MOVABLE ARM MOVES TO THE CONTACTS OPEN POSITION.