sprigings

Claim 1

A CURRENT COLLECTOR DEVICE FOR TRANSFERRING ELECTRICAL CURRENT FROM A CONDUCTOR RAIL SYSTEM TO AN ELECTRICALLY ENERGIZABLE WORK UTILITY, COMPRISING IN COMBINATION, A MOUNTING BASE ADAPTED FOR PHYSICAL SECUREMENT TO THE WORK UTILITY FOR TRAVELLING MOTION THEREWITH, A PAIR OF SPACED APART CURRENT COLLECTOR SHOES EACH CARRYING A SEPARATE CONTACT BLOCK AND ORIENTED FOR DISPOSITION LENGTHWISE OF THE CONDUCTOR RAIL SYSTEM FROM WHICH THE WORK UTILITY IS ENERGIZED WITH THE CONTACT BLOCKS ADAPTED FOR SIMULTANEOUS SLIDING SURFACE CONTACT WITH THE SAME RAIL OF THE CONDUCTOR RAIL SYSTEM, A PAIR OF INDEPENDENT ARMS PIVOTALLY COUPLED TO SPACED APART POINTS OF SAID MOUNTING BASE FOR ROTATION ABOUT PARALLEL AXES AND EXTENDING AWAY FROM THE BASE IN CROSSWISE ORIENTATION TO ONE ANOTHER, EACH OF SAID ARMS BEING PIVOTALLY COUPLED AT ITS OUTER END TO A DIFFERENT ONE OF SAID PAIR OF COLLECTOR SHOES SO THAT SAID SHOES ARE PIVOTABLE ON PARALLEL AXES ORIENTED TRANSVERSELY TO THE LENGTHWISE EXTENT OF THE CONDUCTOR RAIL WITH WHICH THEY ARE ASSOCIATED AND WHICH PARALLEL AXES ARE PARALLEL TO THE PIVOTAL AXES OF SAID ARMS RELATIVE TO SAID MOUNTING BASE, AND RESILIENT BIASING MEANS EXTENDING BETWEEN AND COUPLED TO THE PROXIMATE ENDS OF SAID PAIR OF SHOES, WHEREBY SAID SHOES ARE BIASED TOWARD ONE ANOTHER AND THE OUTER ENDS OF SAID ARMS TEND TO PIVOT OUTWARD AWAY FROM SAID MOUNTING BASE.