Toggle clamp with adjustable guide

Claim 1

A TOGGLE CLAMP MECHANISM COMPRISING A PAIR OF SPACED BASE PLATE ELEMENTS, A CENTRAL CLAMP BAR EXTENDING BETWEEN SAID BASE PLATE ELEMENTS, A FIRST PIVOTAL CONNECTION BETWEEN ONE END OF SAID CLAMP BAR AND SAID BASE PLATE ELEMENTS, A HANDLE HAVING A YOKE SPANNING SAID CLAMP BAR AND BASE PLATE ELEMENTS, A SECOND PIVOTAL CONNECTION BETWEEN THE ENDS OF SAID YOKE AND SAID BASE PLATE ELEMENTS, A PAIR OF LINK ELEMENTS EXTENDING WITHIN SAID YOKE, A THIRD PIVOTAL CONNECTION BETWEEN ONE END OF SAID LINK ELEMENTS AND SAID CLAMP BAR, A FOURTH PIVOTAL CONNECTION BETWEEN THE OTHER END OF SAID LINK ELEMENTS AND SAID YOKE, SAID THIRD PIVOTAL CONNECTION BEING INTERMEDIATE AND ALIGNABLE WITH SAID SECOND AND FOURTH PIVOTAL CONNECTIONS WHEN SAID CLAMP ARM IS IN CLAMPING POSITION, SAID BASE PLATE ELEMENTS HAVING GUIDE EXTENSIONS FOR RECEIVING SAID CLAMP BAR OUTBOARD OF THE RESPECTIVE PIVOTAL CONNECTIONS, AND AN ADJUSTABLE BOLT FOR DRAWING SAID GUIDE EXTENSIONS TOGETHER TO A CLOSELY FITTING RELATIONSHIP WITH SAID CLAMP BAR WHEN THE LATTER IS IN CLAMPING POSITION.