Transmission device

Claim 1

A CHAIN COMPRISING AT LEAST ONE ROW OF ALTERNATING INNER AND OUTER ELONGATED SIDE PLATE LINKS, SUCCESSIVE PIVOT PINS INTERCONNECTING SAID LINKS, EACH OF SAID LINKS HAVING A FIRST OPENING NEAR ITS FORWARD END FOR RECEIVING A PIVOT PIN AND A SECOND OPENING NEAR ITS REAR END FOR RECEIVING THE NEXT SUCCESSIVE PIVOT PIN, AN AUXILIARY PLATE MEMBER SECURED TO THE OUTER FACE OF EACH INNER LINK AND AN AUXILIARY PLATE MEMBER SECURED TO THE INNER FACE OF EACH OUTER LINK, EACH AUXILIARY PLATE MEMBER HAVING A SEMI-CIRCULAR FORWARD END SURFACE AND A REAR END SURFACE EXTENDING BETWEEN SAID FIRST AND SAID SECOND OPENING OF THE ASSOCIATED LINK IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE CENTER LINE THEREOF, SAID AUXILIARY PLATE MEMBER HAVING AN OPENING NEAR SAID FORWARD END SURFACE THEREOF AND REGISTERING WITH SAID FIRST OPENING OF THE ASSOCIATED LINK TO PERMIT THE PASSAGE OF A PIVOT PIN THERETHROUGH, AND A LATERAL, REARWARDLY PROJECTING, SUBSTANTIALLY RECTANGULAR EXTENSION ON ONE LONGITUDINAL EDGE OF SAID AUXILIARY PLATE MEMBER, THE LENGTH OF SAID AUXILIARY PLATE MEMBER AS WELL AS THE LENGTH OF SAID EXTENSION BEING EQUAL TO THE DISTANCE BETWEEN THE AXES OF SAID FIRST AND SAID SECOND OPENINGS OF THE ASSOCIATED LINKS SO THAT A PORTION OF SAID REAR END SURFACE OF EACH AUXILIARY PLATE MEMBER IS IN CONTACT WITH A PORTION OF SAID FRONT END SURFACE OF A NEXT FOLLOWING AUXILIARY PLATE MEMBER AT LEAST WHEN THE LINKS ARE OUT OF ALIGNMENT, AND SO THAT ONE END OF EACH EXTENSION ENGAGES THE OTHER END OF A NEXT FOLLOWING EXTENSION WHEN THE LINKS ARE IN ALIGNMENT.