Catch unit for packing case or the like

Claim 1

IN A CATCH FOR RELEASABLY SECURING TOGETHER TWO SEPARABLE PANELS OR THE LIKE, THE COMBINATION COMPRISING A BASE ADAPTED FOR CONNECTION WITH ONE OF THE SAID PANELS, A FIRST LINK, A SECOND LINK CONNECTED WITH SAID FIRST LINK FOR PIVOTAL MOVEMENT RELATIVE THERETO ABOUT A FIRST TRANSVERSE PIVOT AXIS, A THIRD LINK HAVING A STRIKE ENGAGING PORTION THEREON CONNECTED WITH SAID SECOND LINK FOR PIVOTAL MOVEMENT RELATIVE THERETO ABOUT A SECOND TRANSVERSE PIVOT AXIS SPACED FROM SAID FIRST AXIS, SAID SECOND AND THIRD LINKS BEING PIVOTALLY MOVABLE RELATIVE TO SAID FIRST LINK AND RELATIVE EACH TO THE OTHER BETWEEN A FIRST STATE WHEREIN ALL OF THE SAID LINKS ARE GENERALLY LONGITUDINALLY ALIGNED AND A SECOND STATE WHEREIN SAID THIRD LINK LIES GENERALLY ADJACENT AND PARALLEL TO SAID FIRST LINK, AN OPERATING LEVER CONNECTED WITH SAID BASE FOR PIVOTAL MOVEMENT ABOUT A THIRD TRANSVERSE PIVOT AXIS FIXED RELATIVE TO SAID BASE BETWEEN AN OPEN POSITION AND A CLOSED POSITION, SAID FIRST LINK BEING CONNECTED WITH SAID LEVER FOR PIVOTAL MOVEMENT RELATIVE THERETO ABOUT A FOURTH TRANSVERSE PIVOT AXIS SPACED FROM SAID THIRD AXIS, AND MEANS FOR RELEASABLY RETAINING SAID FIRST, SECOND AND THIRD LINKS IN SAID FIRST AND SECOND STATES.