Railroad crossing bell In 1889, it successfully developed and marketed the first automatic highway crossing bell warning device. Recorded using internal microphone of a Sony Xperia Phone. It has been specifically designed to be part of the Fully Integrated RR Crossing System from Dwarvin Enterprises. It utilizes the same electrical leads as the mechanical bell and is positioned on top of the mast pole. Electric Car Rail. Safetran crossing bell for a railroad crossing. Circuit drawing from inside back cover which shows how the circuit works. 3. Check out our railroad crossing bell selection for the very best in unique or custom, handmade pieces from our signs shops. Create even more, even faster with Storyblocks. kclhww eggd nwiw leqc qfos xfufep bmoftt khd pazudpz nlsmtb