Patent for a new and improved coupling for railroad cars. This design consists in "the combination of two sliding draw-heads, each provided with a shank having coiled around it a spring and a nut secured thereto, an upper sliding supporting-plate for the pin, having a tripping device, a lower sliding supporting-plate for the link, having a catch, a latch with a trip-arm for holding and releasing said plate, and a spring for drawing it back to its normal position" (lines 11-20).