Drive coupling

Claim 1

A DRIVE COUPLING FOR TRANSMITTING ROTARY DRIVE FROM A FIRST SHAFT TO ANOTHER SHAFT WHOSE AXIS MAY BE OFFSET FROM THAT OF SAID SHAFT, SAID DRIVE COUPLING INCLUDING FIRST AND SECOND COUPLING PLATES ADAPTED TO BE SECURED TO SUCH SHAFTS, EACH SAID COUPLING PLATE FIXEDLY CARRYING A PAIR OF BEARING BLOCKS SPACAED APART AT OPPOSITE SIDES OF THE AHAFT AXIS, A CROSS-RIB MEMBER INTERPOSED BETWEEN SAID COUPLING PLATES AND HAVING PROJECTING RIBS AT OPPOSITE SIDES THEREOF, SAID RIBS BEING AT RIGHT ANGLES TO EACH OTHER AND EACH SAID RIB EXTENDING INTO AND ONLY PARTLY FILLING THE SPACE BETWEEN THE PAIR OF BEARING BLOCKS ON A RESPECTIVE ONE OF SAID COUPLING PLATES, A PAIR OF PARALLEL RODS FIXED IN EACH OF SIAD RIBS AND EACH PAIR OF RODS BEING LATERALLY SPACED APART AND DISPOSED AT OPPOSITE SIDES OF THE CENTER OF SAID TRANSVERSE-RIB MEMBER, SAID RODS EXTENDING IN OPPOSITE DIRECTIONS THROUGH AND BEYOND SAID BEARING BLOCKS, AND A BEARING IN EACH BLOCK TIGHTLY BUT SLIDABLY RECEIVING A RESPECTIVE END OF ONE OF SAID RODS, EACH SAID BEARING INCLUDING PLURAL ENDLESS BALL-BEARING RACES EACH HAVING AN EXPOSED LINE OF BALL-BEARINGS EXTENDING PARALLEL TO THE AXIS OF THE ROD ENGAGAED THEREBY.