Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 4275664 | Step-platform operation A step-platform operator 17 for transit vehicles for driving a step 19 and a platform 18 between open and closed positions, includes a reversible drive motor 42 driving the step and platform through a lever and linkage for providing differential motion be... | 06/30/1981 |
| 4273498 | Railway car trap door lift A railway car includes conventional steps leading from a lower station platform to the floor level in a vestibule. A lift platform adapted to receive a seat or wheel chair is provided to lift a handicapped person who has difficulty going up or down steps.... | 06/16/1981 |
