By 1825, he had started practical work on a steam carriage, taking space for a small workshop in Oxford Street and filing a first patent for "An apparatus for propelling carriages on common roads or railways – without the aid of horses, with sufficient speed for the carriage of passengers and goods". His work encompassed the development of the blastpipe, which used steam to increase the flow of air through a steam engine's chimney, so increasing the draw of air over the fire and, in short, much increasing the power-to-weight ratio of the steam engine.